/* ===================================
   HVAC Cost Guide – Premium SaaS 2026
   Stripe/Webflow Inspired Full-Width Design
   Soft Blue + Warm Orange Contrast
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Soft Blue Primary */
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-300: #93c5fd;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-800: #1e40af;
  --blue-900: #1e3a8a;

  /* Warm Orange */
  --orange-50: #fff7ed;
  --orange-100: #ffedd5;
  --orange-200: #fed7aa;
  --orange-300: #fdba74;
  --orange-400: #fb923c;
  --orange-500: #f97316;
  --orange-600: #ea580c;
  --orange-700: #c2410c;

  /* Neutral Slate */
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;

  /* Background */
  --bg-primary: #f0f5ff;
  --bg-secondary: #ffffff;
  --bg-dark: var(--slate-900);
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-dark: rgba(15, 23, 42, 0.72);

  /* Text */
  --text-primary: var(--slate-900);
  --text-secondary: var(--slate-600);
  --text-muted: var(--slate-400);
  --text-inverse: #ffffff;

  /* Gradients */
  --gradient-blue: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --gradient-blue-light: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
  --gradient-orange: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  --gradient-hero-bg: linear-gradient(160deg, #0f172a 0%, #1e3a8a 40%, #1e40af 70%, #1d4ed8 100%);
  --gradient-card-glow: linear-gradient(135deg, rgba(59,130,246,0.08) 0%, rgba(249,115,22,0.06) 100%);
  --gradient-cta: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #8b5cf6 100%);
  --gradient-text-blue: linear-gradient(135deg, #60a5fa, #3b82f6, #2563eb);

  /* Glass */
  --glass-bg: rgba(255,255,255,0.72);
  --glass-border: rgba(255,255,255,0.25);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.06);
  --glass-blur: blur(24px);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.1);
  --shadow-2xl: 0 24px 64px rgba(0,0,0,0.14);
  --shadow-glow-blue: 0 0 40px rgba(59,130,246,0.25);
  --shadow-glow-orange: 0 0 40px rgba(249,115,22,0.25);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.04), 0 1px 4px rgba(0,0,0,0.03);
  --shadow-card-hover: 0 8px 32px rgba(59,130,246,0.12), 0 4px 12px rgba(0,0,0,0.06);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.75rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.875rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.25vw, 1rem);
  --text-lg: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-xl: clamp(1.1rem, 1rem + 0.5vw, 1.25rem);
  --text-2xl: clamp(1.3rem, 1.1rem + 1vw, 1.5rem);
  --text-3xl: clamp(1.6rem, 1.2rem + 2vw, 1.875rem);
  --text-4xl: clamp(2rem, 1.4rem + 3vw, 2.5rem);
  --text-5xl: clamp(2.5rem, 1.5rem + 5vw, 3.75rem);

  /* Spacing */
  --sp-xs: 0.25rem;
  --sp-sm: 0.5rem;
  --sp-md: 1rem;
  --sp-lg: 1.5rem;
  --sp-xl: 2rem;
  --sp-2xl: 3rem;
  --sp-3xl: 4rem;
  --sp-4xl: 5rem;
  --sp-5xl: 6rem;

  /* Layout */
  --container-max: 1400px;
  --content-max: 820px;
  --header-height: 72px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
  --transition-slow: 400ms var(--ease-out);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--blue-600); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--blue-700); }
a:focus-visible { outline: 2px solid var(--blue-500); outline-offset: 3px; border-radius: 2px; }

ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--text-primary);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
}
h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p { margin-bottom: var(--sp-md); color: var(--text-secondary); }

/* ===== BACKGROUND ===== */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 60% at 10% 90%, rgba(59,130,246,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 10%, rgba(249,115,22,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(99,102,241,0.04) 0%, transparent 60%),
    var(--bg-primary);
}

/* ===== SKIP LINK ===== */
.skip-link {
  position: absolute; top: -100%; left: var(--sp-md);
  background: var(--blue-600); color: #fff;
  padding: var(--sp-sm) var(--sp-md); border-radius: var(--radius-md);
  z-index: 10000; font-weight: 600;
}
.skip-link:focus { top: var(--sp-md); }

/* ===== CONTAINER ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}
.container-narrow { max-width: var(--content-max); margin: 0 auto; }

.text-center { text-align: center; }
.mt-xl { margin-top: var(--sp-xl) !important; }
.mt-2xl { margin-top: var(--sp-2xl) !important; }
.mb-xl { margin-bottom: var(--sp-xl) !important; }

/* ==========================================
   NAVBAR – Glass SaaS Style
   ========================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.82);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: box-shadow var(--transition-base);
}
.site-header.scrolled {
  box-shadow: var(--shadow-md);
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.03em;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
  text-decoration: none;
}
.site-logo:hover { transform: scale(1.02); }
.site-logo svg {
  width: 28px; height: 28px;
  filter: drop-shadow(0 2px 6px rgba(59,130,246,0.3));
}

/* Nav */
.main-nav ul { display: none; gap: var(--sp-xl); align-items: center; }
.main-nav a {
  color: var(--slate-600);
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--sp-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
  text-decoration: none;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--gradient-blue);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}
.main-nav a:hover { color: var(--blue-600); }
.main-nav a:hover::after,
.main-nav a.active::after { width: 100%; }
.main-nav a.active { color: var(--blue-600); }

/* Nav Right */
.nav-right {
  display: none;
  align-items: center;
  gap: var(--sp-md);
}
.nav-flags {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  font-size: var(--text-sm);
  color: var(--slate-500);
  font-weight: 500;
}
.nav-flags span { font-size: 1.15rem; }

.btn-signin {
  color: var(--slate-700);
  font-weight: 600;
  font-size: var(--text-sm);
  padding: var(--sp-sm) var(--sp-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.btn-signin:hover { color: var(--blue-600); background: var(--blue-50); }

.btn-getstarted {
  display: inline-flex;
  align-items: center;
  padding: var(--sp-sm) var(--sp-lg);
  background: var(--gradient-blue);
  color: #fff;
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(59,130,246,0.3);
  transition: all var(--transition-base);
}
.btn-getstarted:hover {
  box-shadow: 0 6px 20px rgba(59,130,246,0.45);
  transform: translateY(-2px);
  color: #fff;
}

/* Mobile Toggle */
.nav-toggle {
  display: block;
  background: none; border: none;
  cursor: pointer; padding: var(--sp-sm);
  width: 40px; height: 40px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--slate-800);
  margin: 5px auto;
  border-radius: 2px;
  transition: all var(--transition-base);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }

@media (min-width: 1024px) {
  .main-nav ul { display: flex; }
  .nav-toggle { display: none; }
  .nav-right { display: flex; }
}

.main-nav.open ul {
  display: flex !important;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0; right: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  padding: var(--sp-lg);
  border-bottom: 1px solid var(--slate-200);
  box-shadow: var(--shadow-lg);
  animation: slideDown 0.3s var(--ease-out);
}
.main-nav.open .nav-right-mobile {
  display: flex !important;
  flex-direction: column;
  padding: var(--sp-md) var(--sp-lg) var(--sp-lg);
  gap: var(--sp-sm);
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================
   HERO – Full-Width SaaS with 3D Scene
   ========================================== */
.hero-saas {
  position: relative;
  overflow: hidden;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero-bg);
  padding: calc(var(--header-height) + var(--sp-3xl)) 0 var(--sp-5xl);
}

/* 3D Scene Background Image */
.hero-scene {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

/* Hero background image with zoom animation */
.hero-scene::before {
  content: '';
  position: absolute;
  inset: -20px;
  background: url('/assets/images/hero-bg-opt.png') center center / cover no-repeat;
  filter: brightness(0.55) saturate(1.3) contrast(1.1);
  animation: heroZoom 25s ease-in-out infinite alternate;
  transform-origin: center center;
}
@keyframes heroZoom {
  0% { transform: scale(1); }
  100% { transform: scale(1.08); }
}

/* Blue + Orange glow overlay on top of image */
.hero-scene::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 45% 80% at 12% 50%, rgba(59,130,246,0.3) 0%, transparent 70%),
    radial-gradient(ellipse 45% 80% at 88% 50%, rgba(249,115,22,0.25) 0%, transparent 70%),
    radial-gradient(ellipse 80% 60% at 50% 100%, rgba(15,23,42,0.6) 0%, transparent 60%);
  z-index: 1;
  animation: glowPulse 6s ease-in-out infinite alternate;
}

@keyframes glowPulse {
  0% { opacity: 0.6; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.1); }
}

/* SVG Ducts */
.hero-ducts {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.12;
  pointer-events: none;
}

/* Floating Particles */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.hero-particle {
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  animation: particleFloat 12s ease-in-out infinite;
}
.hero-particle:nth-child(1) { background: rgba(59,130,246,0.6); top: 20%; left: 15%; animation-delay: 0s; }
.hero-particle:nth-child(2) { background: rgba(249,115,22,0.5); top: 30%; right: 20%; animation-delay: -2s; }
.hero-particle:nth-child(3) { background: rgba(59,130,246,0.4); bottom: 25%; left: 30%; animation-delay: -4s; width: 8px; height: 8px; }
.hero-particle:nth-child(4) { background: rgba(249,115,22,0.5); top: 60%; right: 35%; animation-delay: -6s; }
.hero-particle:nth-child(5) { background: rgba(99,102,241,0.4); top: 15%; left: 55%; animation-delay: -8s; width: 4px; height: 4px; }
.hero-particle:nth-child(6) { background: rgba(59,130,246,0.5); bottom: 15%; right: 10%; animation-delay: -10s; }

@keyframes particleFloat {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
  25% { transform: translate(20px, -30px) scale(1.3); opacity: 0.8; }
  50% { transform: translate(-15px, 15px) scale(0.8); opacity: 0.4; }
  75% { transform: translate(10px, -20px) scale(1.1); opacity: 0.7; }
}

/* Hero Content */
.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: var(--sp-xs) var(--sp-lg);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  color: rgba(255,255,255,0.85);
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--sp-xl);
  backdrop-filter: blur(12px);
  animation: fadeUp 0.7s var(--ease-out);
}
.hero-badge-dot {
  width: 8px; height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: dotPulse 2s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-content h1 {
  color: #fff;
  font-size: var(--text-5xl);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: var(--sp-lg);
  text-shadow: 0 4px 30px rgba(0,0,0,0.2);
  animation: fadeUp 0.7s var(--ease-out) 0.1s both;
}

.hero-content .hero-sub {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.78);
  max-width: 560px;
  margin: 0 auto var(--sp-2xl);
  line-height: 1.6;
  animation: fadeUp 0.7s var(--ease-out) 0.2s both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== GLASS INPUT BAR ===== */
.hero-input-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-md);
  box-shadow: var(--glass-shadow), 0 0 60px rgba(59,130,246,0.1);
  max-width: 720px;
  margin: 0 auto var(--sp-xl);
  animation: fadeUp 0.7s var(--ease-out) 0.3s both;
}

.hero-input-group {
  flex: 1;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hero-input-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--slate-500);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.hero-input-group select,
.hero-input-group input {
  padding: var(--sp-sm) var(--sp-md);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  background: rgba(255,255,255,0.8);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}
.hero-input-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}
.hero-input-group select:focus,
.hero-input-group input:focus {
  outline: none;
  border-color: var(--blue-400);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.hero-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  padding: var(--sp-md) var(--sp-2xl);
  background: var(--gradient-blue);
  color: #fff;
  font-weight: 700;
  font-size: var(--text-base);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(59,130,246,0.35);
  transition: all var(--transition-base);
  white-space: nowrap;
  text-decoration: none;
  width: 100%;
}
.hero-cta-btn:hover {
  box-shadow: 0 8px 32px rgba(59,130,246,0.5);
  transform: translateY(-2px);
  color: #fff;
}
.hero-cta-btn svg { width: 18px; height: 18px; }

/* Hero Trust Line */
.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-lg);
  flex-wrap: wrap;
  color: rgba(255,255,255,0.55);
  font-size: var(--text-sm);
  animation: fadeUp 0.7s var(--ease-out) 0.45s both;
}
.hero-trust-item {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
}
.hero-trust-item svg { width: 16px; height: 16px; opacity: 0.7; }

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  padding: clamp(0.65rem, 1.5vw, 0.85rem) clamp(1.2rem, 3vw, 1.8rem);
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.12) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.btn:hover::before { opacity: 1; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient-blue);
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(59,130,246,0.3);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(59,130,246,0.45);
  transform: translateY(-2px);
  color: #fff !important;
}
.btn-primary:visited {
  color: #fff !important;
}

.btn-secondary {
  background: #fff;
  color: var(--slate-700);
  border: 1.5px solid var(--slate-200);
}
.btn-secondary:hover {
  border-color: var(--blue-300);
  background: var(--blue-50);
  color: var(--blue-600);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--gradient-orange);
  color: #fff;
  box-shadow: 0 4px 14px rgba(249,115,22,0.3);
}
.btn-accent:hover {
  box-shadow: 0 6px 20px rgba(249,115,22,0.45);
  transform: translateY(-2px);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--slate-600);
  border: 1.5px solid var(--slate-200);
}
.btn-ghost:hover {
  border-color: var(--blue-300);
  color: var(--blue-600);
  transform: translateY(-2px);
}

.btn-sm { padding: var(--sp-sm) var(--sp-lg); font-size: var(--text-xs); }
.btn-lg { padding: var(--sp-md) var(--sp-2xl); font-size: var(--text-base); }

/* ==========================================
   SECTIONS
   ========================================== */
.section { padding: clamp(3rem, 7vw, 6rem) 0; }
.section-alt {
  background: var(--slate-50);
  border-top: 1px solid var(--slate-100);
  border-bottom: 1px solid var(--slate-100);
}

.section-title {
  text-align: center;
  margin-bottom: var(--sp-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.section-title h2 {
  margin-bottom: var(--sp-sm);
}
.section-title p {
  color: var(--text-secondary);
  font-size: var(--text-lg);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--blue-600);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--sp-md);
}
.section-label::before,
.section-label::after {
  content: '';
  width: 20px; height: 1px;
  background: var(--blue-300);
}

/* ==========================================
   FEATURE STAT CARDS (4 horizontal)
   ========================================== */
.feature-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
  margin-top: calc(-1 * var(--sp-3xl));
  position: relative;
  z-index: 20;
  padding: 0 var(--sp-md);
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 640px) { .feature-stats { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .feature-stats { grid-template-columns: repeat(4, 1fr); } }

.stat-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.stat-card:nth-child(1)::before { background: var(--gradient-blue); }
.stat-card:nth-child(2)::before { background: var(--gradient-orange); }
.stat-card:nth-child(3)::before { background: linear-gradient(135deg, #10b981, #059669); }
.stat-card:nth-child(4)::before { background: linear-gradient(135deg, #8b5cf6, #6366f1); }

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.stat-card:hover::before { opacity: 1; }

.stat-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-md);
}
.stat-card:nth-child(1) .stat-icon { background: var(--blue-100); color: var(--blue-600); }
.stat-card:nth-child(2) .stat-icon { background: var(--orange-100); color: var(--orange-600); }
.stat-card:nth-child(3) .stat-icon { background: #d1fae5; color: #059669; }
.stat-card:nth-child(4) .stat-icon { background: #ede9fe; color: #7c3aed; }
.stat-icon svg { width: 22px; height: 22px; }

.stat-value {
  font-size: var(--text-3xl);
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.stat-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==========================================
   GLASS CARD
   ========================================== */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}
.glass-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

/* ==========================================
   TOOLS GRID – Premium Cards
   ========================================== */
.tools-page-header {
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero-bg);
  padding: calc(var(--header-height) + var(--sp-3xl)) 0 var(--sp-3xl);
  text-align: center;
}
.tools-page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(59,130,246,0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(249,115,22,0.15) 0%, transparent 50%);
}
.tools-page-header .container { position: relative; z-index: 2; }
.tools-page-header h1 {
  color: #fff;
  font-size: var(--text-4xl);
  margin-bottom: var(--sp-md);
}
.tools-page-header .subtitle {
  color: rgba(255,255,255,0.78);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
}

/* Tools Stats Bar */
.tools-stats-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-lg);
  padding: var(--sp-xl) 0;
  max-width: var(--container-max);
  margin: 0 auto;
}
.tools-stat {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  padding: var(--sp-sm) var(--sp-lg);
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
}
.tools-stat svg { width: 18px; height: 18px; color: var(--blue-500); }
.tools-stat .stat-num { color: var(--blue-600); font-weight: 800; }

/* Tools Filter */
.tools-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-xl);
  justify-content: center;
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
}
@media (min-width: 640px) { .tools-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .tools-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1280px) { .tools-grid { grid-template-columns: repeat(4, 1fr); } }

/* Premium Tool Card */
.tool-card-premium {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all 0.4s var(--ease-out);
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  position: relative;
}
.tool-card-premium.revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.tool-card-premium:hover {
  box-shadow: 0 12px 40px rgba(59,130,246,0.15), 0 4px 12px rgba(0,0,0,0.06);
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(59,130,246,0.2);
}
.tool-card-premium.revealed:hover {
  transform: translateY(-8px) scale(1.02);
}

/* Card Top Gradient Strip */
.tool-card-premium::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.tool-card-premium:hover::before { opacity: 1; }
.tool-card-premium:nth-child(8n+1)::before { background: linear-gradient(90deg, #3b82f6, #60a5fa); }
.tool-card-premium:nth-child(8n+2)::before { background: linear-gradient(90deg, #f97316, #fb923c); }
.tool-card-premium:nth-child(8n+3)::before { background: linear-gradient(90deg, #10b981, #34d399); }
.tool-card-premium:nth-child(8n+4)::before { background: linear-gradient(90deg, #8b5cf6, #a78bfa); }
.tool-card-premium:nth-child(8n+5)::before { background: linear-gradient(90deg, #ec4899, #f472b6); }
.tool-card-premium:nth-child(8n+6)::before { background: linear-gradient(90deg, #06b6d4, #22d3ee); }
.tool-card-premium:nth-child(8n+7)::before { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.tool-card-premium:nth-child(8n+8)::before { background: linear-gradient(90deg, #6366f1, #818cf8); }

/* Card Icon Area */
.tool-card-icon {
  width: 100%;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.tool-card-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.08;
}
.tool-card-icon svg {
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 1;
  transition: all var(--transition-base);
}
.tool-card-premium:hover .tool-card-icon svg {
  transform: scale(1.15) rotate(-3deg);
}

/* 8 color themes for tool cards */
.tool-card-premium:nth-child(8n+1) .tool-card-icon { background: linear-gradient(135deg, rgba(59,130,246,0.1) 0%, rgba(37,99,235,0.05) 100%); }
.tool-card-premium:nth-child(8n+1) .tool-card-icon svg { color: #3b82f6; }
.tool-card-premium:nth-child(8n+2) .tool-card-icon { background: linear-gradient(135deg, rgba(249,115,22,0.1) 0%, rgba(234,88,12,0.05) 100%); }
.tool-card-premium:nth-child(8n+2) .tool-card-icon svg { color: #f97316; }
.tool-card-premium:nth-child(8n+3) .tool-card-icon { background: linear-gradient(135deg, rgba(16,185,129,0.1) 0%, rgba(5,150,105,0.05) 100%); }
.tool-card-premium:nth-child(8n+3) .tool-card-icon svg { color: #10b981; }
.tool-card-premium:nth-child(8n+4) .tool-card-icon { background: linear-gradient(135deg, rgba(139,92,246,0.1) 0%, rgba(124,58,237,0.05) 100%); }
.tool-card-premium:nth-child(8n+4) .tool-card-icon svg { color: #8b5cf6; }
.tool-card-premium:nth-child(8n+5) .tool-card-icon { background: linear-gradient(135deg, rgba(236,72,153,0.1) 0%, rgba(219,39,119,0.05) 100%); }
.tool-card-premium:nth-child(8n+5) .tool-card-icon svg { color: #ec4899; }
.tool-card-premium:nth-child(8n+6) .tool-card-icon { background: linear-gradient(135deg, rgba(6,182,212,0.1) 0%, rgba(8,145,178,0.05) 100%); }
.tool-card-premium:nth-child(8n+6) .tool-card-icon svg { color: #06b6d4; }
.tool-card-premium:nth-child(8n+7) .tool-card-icon { background: linear-gradient(135deg, rgba(245,158,11,0.1) 0%, rgba(217,119,6,0.05) 100%); }
.tool-card-premium:nth-child(8n+7) .tool-card-icon svg { color: #f59e0b; }
.tool-card-premium:nth-child(8n+8) .tool-card-icon { background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(79,70,229,0.05) 100%); }
.tool-card-premium:nth-child(8n+8) .tool-card-icon svg { color: #6366f1; }

/* Card Body */
.tool-card-body {
  padding: var(--sp-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}
.tool-card-body .tool-category {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.tool-card-body h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}
.tool-card-body h3 a { color: var(--text-primary); }
.tool-card-body h3 a:hover { color: var(--blue-600); }
.tool-card-body .tool-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}
.tool-card-body .tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  padding: var(--sp-sm) var(--sp-lg);
  background: var(--slate-50);
  color: var(--blue-600);
  font-weight: 700;
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  border: 1.5px solid var(--slate-200);
  transition: all var(--transition-base);
  text-decoration: none;
  align-self: flex-start;
  margin-top: auto;
}
.tool-card-body .tool-btn:hover {
  background: var(--gradient-blue);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(59,130,246,0.25);
  transform: translateY(-2px);
}
.tool-card-body .tool-btn svg { width: 16px; height: 16px; transition: transform var(--transition-fast); }
.tool-card-body .tool-btn:hover svg { transform: translateX(3px); }

/* Tool Skeleton Cards */
.skeleton-tool-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.skeleton-tool-card .skeleton-icon-area { height: 120px; }
.skeleton-tool-card .skeleton-tool-body { padding: var(--sp-lg); }
.skeleton-tool-card .skeleton-cat { width: 80px; height: 12px; margin-bottom: var(--sp-md); }
.skeleton-tool-card .skeleton-title { width: 75%; height: 18px; margin-bottom: var(--sp-sm); }
.skeleton-tool-card .skeleton-desc { width: 100%; height: 14px; margin-bottom: var(--sp-sm); }
.skeleton-tool-card .skeleton-desc:last-child { width: 60%; }
.skeleton-tool-card .skeleton-btn { width: 100px; height: 36px; margin-top: var(--sp-md); border-radius: var(--radius-full); }

/* ==========================================
   TOOL PAGE – 2 Column Layout
   ========================================== */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-xl);
  align-items: start;
}
@media (min-width: 1024px) {
  .tool-layout { grid-template-columns: 1fr 1fr; gap: var(--sp-2xl); }
}

.tool-inputs {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--sp-xl);
  box-shadow: var(--shadow-card);
  position: sticky;
  top: calc(var(--header-height) + var(--sp-md));
}
@media (max-width: 1023px) {
  .tool-inputs { position: static; }
}

.tool-form { display: flex; flex-direction: column; gap: var(--sp-md); }

.tool-results {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--sp-xl);
  box-shadow: var(--shadow-card);
  min-height: 400px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-md);
  margin-top: var(--sp-md);
}
.result-box {
  background: var(--slate-50);
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-md);
  text-align: center;
}
.result-box-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.result-box-value {
  font-size: var(--text-2xl);
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* Monthly Bars Chart */
.monthly-bars {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.monthly-bar-row {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
}
.monthly-bar-label {
  width: 36px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-align: right;
  flex-shrink: 0;
}
.monthly-bar-track {
  flex: 1;
  height: 22px;
  background: var(--slate-100);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
}
.monthly-bar-fill {
  height: 100%;
  border-radius: var(--radius-sm);
  transition: width 0.8s var(--ease-out);
  background: var(--gradient-blue);
}
.monthly-bar-fill.heat { background: var(--gradient-orange); }
.monthly-bar-value {
  width: 52px;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
}

/* Result Tip */
.result-tip {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-sm);
  padding: var(--sp-md);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-md);
  margin-top: var(--sp-lg);
  font-size: var(--text-sm);
  color: var(--blue-700);
  line-height: 1.5;
}
.result-tip svg { flex-shrink: 0; margin-top: 2px; }

/* ==========================================
   RELATED TOOLS CARDS
   ========================================== */
.related-tools-section { padding: var(--sp-3xl) 0; }
.related-tools-section h2 { text-align: center; margin-bottom: var(--sp-2xl); }
.related-tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
}
@media (min-width: 640px) { .related-tools-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .related-tools-grid { grid-template-columns: repeat(4, 1fr); } }

.related-tool-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
  text-decoration: none;
}
.related-tool-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: rgba(59,130,246,0.2);
}
.related-tool-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--blue-100); color: var(--blue-600);
}
.related-tool-icon svg { width: 24px; height: 24px; }
.related-tool-card:nth-child(2) .related-tool-icon { background: var(--orange-100); color: var(--orange-600); }
.related-tool-card:nth-child(3) .related-tool-icon { background: #d1fae5; color: #059669; }
.related-tool-card:nth-child(4) .related-tool-icon { background: #ede9fe; color: #7c3aed; }
.related-tool-card h4 { font-size: var(--text-base); margin: 0; }
.related-tool-card h4 span { color: var(--text-primary); }
.related-tool-card:hover h4 span { color: var(--blue-600); }
.related-tool-card p { font-size: var(--text-sm); color: var(--text-secondary); margin: 0; line-height: 1.55; }
.related-tool-card .related-tool-link {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--blue-600);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
}
.related-tool-card:hover .related-tool-link { gap: 8px; }
.related-tool-link svg { width: 16px; height: 16px; transition: transform var(--transition-fast); }
.related-tool-card:hover .related-tool-link svg { transform: translateX(3px); }

/* ==========================================
   ENERGY USAGE / CHARTS SECTION
   ========================================== */
.charts-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-xl);
}
@media (min-width: 1024px) {
  .charts-layout { grid-template-columns: 1.4fr 1fr; }
}

.charts-left { display: flex; flex-direction: column; gap: var(--sp-lg); }
.charts-right { display: flex; flex-direction: column; gap: var(--sp-lg); }

.chart-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-xl);
  box-shadow: var(--shadow-card);
}
.chart-card h4 {
  font-size: var(--text-lg);
  margin-bottom: var(--sp-md);
  font-weight: 700;
}

/* Simple CSS Bar Chart */
.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: var(--sp-sm);
  height: 180px;
  padding-top: var(--sp-md);
}
.bar-chart .bar {
  flex: 1;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all var(--transition-base);
  position: relative;
  min-width: 20px;
}
.bar-chart .bar:hover { opacity: 0.8; transform: scaleY(1.05); transform-origin: bottom; }
.bar-chart .bar-blue { background: var(--gradient-blue); }
.bar-chart .bar-orange { background: var(--gradient-orange); }
.bar-chart .bar-green { background: linear-gradient(180deg, #10b981, #059669); }
.bar-chart .bar-purple { background: linear-gradient(180deg, #8b5cf6, #6366f1); }
.bar-labels {
  display: flex;
  gap: var(--sp-sm);
  margin-top: var(--sp-sm);
}
.bar-labels span {
  flex: 1;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 500;
}

/* Savings Cards */
.savings-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}
.savings-card:hover { transform: translateX(4px); box-shadow: var(--shadow-md); }

.savings-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.savings-icon svg { width: 24px; height: 24px; }
.savings-card:nth-child(odd) .savings-icon { background: #d1fae5; color: #059669; }
.savings-card:nth-child(even) .savings-icon { background: var(--blue-100); color: var(--blue-600); }

.savings-info h5 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text-primary);
}
.savings-info p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0;
}
.savings-amount {
  font-size: var(--text-xl);
  font-weight: 900;
  color: #059669;
}

/* ==========================================
   BLOG TABS
   ========================================== */
.blog-tabs-section {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--sp-2xl);
  box-shadow: var(--shadow-card);
}

.tab-buttons {
  display: flex;
  gap: var(--sp-sm);
  flex-wrap: wrap;
  margin-bottom: var(--sp-xl);
  border-bottom: 2px solid var(--slate-100);
  padding-bottom: var(--sp-md);
}
.tab-btn {
  padding: var(--sp-sm) var(--sp-lg);
  background: transparent;
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--slate-500);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.tab-btn:hover { color: var(--blue-600); background: var(--blue-50); }
.tab-btn.active {
  background: var(--gradient-blue);
  color: #fff;
  box-shadow: 0 4px 12px rgba(59,130,246,0.25);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp 0.3s var(--ease-out); }

.blog-preview-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
}
@media (min-width: 640px) { .blog-preview-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .blog-preview-grid { grid-template-columns: repeat(3, 1fr); } }

.blog-preview-card {
  background: var(--slate-50);
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}
.blog-preview-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.blog-preview-img {
  width: 100%;
  height: 140px;
  background: var(--gradient-card-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-400);
}
.blog-preview-img svg { width: 40px; height: 40px; opacity: 0.5; }

.blog-preview-body {
  padding: var(--sp-lg);
}
.blog-preview-body h4 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--sp-sm);
  line-height: 1.3;
}
.blog-preview-body h4 a { color: var(--text-primary); }
.blog-preview-body h4 a:hover { color: var(--blue-600); }
.blog-preview-body p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0 0 var(--sp-md);
}

/* ==========================================
   TRUST SECTION
   ========================================== */
.trust-section {
  text-align: center;
  padding: var(--sp-3xl) 0;
}

.trust-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-xl);
  margin-top: var(--sp-2xl);
}

.trust-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-sm);
  padding: var(--sp-xl) var(--sp-2xl);
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  min-width: 160px;
}
.trust-badge-icon {
  font-size: 2.5rem;
  margin-bottom: var(--sp-xs);
}
.trust-badge h4 {
  font-size: var(--text-lg);
  font-weight: 800;
  margin: 0;
}
.trust-badge p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: 0;
}

/* ==========================================
   CTA SECTION
   ========================================== */
.cta-section {
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero-bg);
  padding: var(--sp-4xl) 0;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(59,130,246,0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(249,115,22,0.15) 0%, transparent 50%);
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
  color: #fff;
  font-size: var(--text-4xl);
  margin-bottom: var(--sp-md);
}
.cta-section p {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-lg);
  max-width: 500px;
  margin: 0 auto var(--sp-xl);
}
.cta-section .btn-primary {
  background: #3b82f6;
  color: #ffffff;
  box-shadow: 0 6px 24px rgba(0,0,0,0.2);
}
.cta-section .btn-primary:hover {
  background: #2563eb;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  color: #ffffff;
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
  background: var(--slate-950);
  color: var(--slate-400);
  padding: var(--sp-4xl) 0 var(--sp-xl);
  width: 100%;
  margin-top: auto;
}

.footer-inner {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 4rem);
  box-sizing: border-box;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-2xl);
  margin-bottom: var(--sp-2xl);
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
}

.footer-brand h4 {
  color: #fff;
  font-size: var(--text-xl);
  font-weight: 800;
  margin-bottom: var(--sp-md);
}

.footer-brand p {
  color: var(--slate-400);
  font-size: var(--text-sm);
  line-height: 1.65;
  max-width: 320px;
}

.footer-col h5 {
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--sp-md);
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li { margin-bottom: var(--sp-sm); }

.footer-col a {
  color: var(--slate-400);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--slate-500);
}

@media (min-width: 768px) {
  .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}

.footer-bottom a {
  color: var(--slate-500);
  text-decoration: none;
}

.footer-bottom a:hover { color: #fff; }

.footer-flags {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  font-size: var(--text-sm);
  color: var(--slate-500);
}

.footer-flags span { font-size: 1.25rem; }

/* Extra spacing for pages with sections */
.section + .site-footer,
.section-alt + .site-footer {
  margin-top: var(--sp-3xl);
}

/* ==========================================
   COOKIE CONSENT
   ========================================== */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: rgba(15,23,42,0.95);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: #fff;
  padding: var(--sp-lg);
  z-index: 9999;
  box-shadow: 0 -8px 32px rgba(0,0,0,0.2);
  display: none;
}
.cookie-banner.show { display: block; animation: fadeUp 0.4s var(--ease-out); }
.cookie-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-md);
  align-items: center;
}
@media (min-width: 768px) {
  .cookie-content { flex-direction: row; justify-content: space-between; }
}
.cookie-banner p { font-size: var(--text-sm); margin: 0; flex: 1; }
.cookie-banner a { color: var(--orange-400); text-decoration: underline; }
.cookie-buttons { display: flex; gap: var(--sp-sm); flex-wrap: wrap; }
.cookie-btn {
  padding: var(--sp-sm) var(--sp-lg);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}
.cookie-btn-accept { background: #10b981; color: #fff; }
.cookie-btn-accept:hover { background: #059669; transform: translateY(-1px); }
.cookie-btn-reject { background: transparent; color: #fff; border: 1px solid var(--slate-600); }
.cookie-btn-reject:hover { background: var(--slate-800); }
.cookie-btn-customize { background: transparent; color: #fbbf24; text-decoration: underline; }

/* ==========================================
   ARTICLE CONTENT (blog posts, about, etc)
   ========================================== */

/* General link styles for better readability */
a {
  color: var(--blue-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}
a:hover {
  color: var(--blue-700);
}

/* Body text styling for better readability */
body {
  color: var(--text-primary);
  line-height: 1.6;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  line-height: 1.3;
}



/* Tool card text */
.tool-card-body h3 {
  color: var(--text-primary);
  font-weight: 700;
}
.tool-card-body p {
  color: var(--text-secondary);
}

.page-header-inner {
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero-bg);
  padding: calc(var(--header-height) + var(--sp-3xl)) 0 var(--sp-3xl);
  text-align: center;
}
.page-header-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(59,130,246,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(249,115,22,0.1) 0%, transparent 50%);
}
.page-header-inner .container { position: relative; z-index: 2; }
.page-header-inner h1 {
  color: #fff;
  font-size: var(--text-4xl);
  margin-bottom: var(--sp-md);
}
.page-header-inner .subtitle {
  color: rgba(255,255,255,0.75);
  font-size: var(--text-lg);
  max-width: 560px;
  margin: 0 auto;
}

/* Breadcrumbs */
.breadcrumbs {
  padding: var(--sp-md) 0;
  font-size: 0.875rem;
  color: #64748b;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: clamp(1.25rem, 4vw, 3rem);
  padding-right: clamp(1.25rem, 4vw, 3rem);
  display: block;
}
.breadcrumbs a { 
  color: #64748b; 
  text-decoration: none;
  transition: color 0.2s;
}
.breadcrumbs a:hover { 
  color: #2563eb; 
}
.breadcrumbs span { 
  margin: 0 0.5rem; 
  color: #94a3b8;
}

.article-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--sp-2xl) clamp(1.25rem, 4vw, 3rem);
}
.article-content h2 {
  margin-top: var(--sp-2xl);
  padding-bottom: var(--sp-sm);
  border-bottom: 2px solid var(--slate-100);
}
.article-content h3 { margin-top: var(--sp-xl); color: var(--text-primary); }
.article-content p { color: var(--text-secondary); line-height: 1.8; }
.article-content ul, .article-content ol {
  padding-left: var(--sp-xl);
  margin-bottom: var(--sp-md);
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: var(--sp-sm); color: var(--text-secondary); }
.article-content a { color: var(--blue-600); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--blue-700); }

/* Blog Post Header Meta - Fix contrast on dark background */
.page-header-inner .meta {
  color: rgba(255,255,255,0.95);
  font-size: var(--text-sm);
  margin-top: var(--sp-md);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
}
.page-header-inner .meta a {
  color: #fff !important;
  text-decoration: none;
  font-weight: 600;
}
.page-header-inner .meta a:hover {
  color: var(--blue-200) !important;
  text-decoration: underline;
}
.page-header-inner .meta .author,
.page-header-inner .meta .reviewed,
.page-header-inner .meta .date {
  color: rgba(255,255,255,0.85);
}
.page-header-inner .meta .reviewed {
  font-style: italic;
  font-size: 0.85rem;
}

/* Word count badge styling */
.page-header-inner .word-count,
.page-header-inner .meta .word-count {
  background: rgba(255,255,255,0.2);
  color: #fff !important;
  padding: 0.3rem 0.85rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-block;
  backdrop-filter: blur(4px);
}

/* Word count badge */
.word-count {
  background: rgba(59,130,246,0.1);
  color: var(--blue-600) !important;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-block;
}

/* Blog Card Text - Better contrast */
.blog-card-body h3 {
  color: var(--text-primary);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--sp-sm);
  line-height: 1.4;
}
.blog-card-body h3 a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.blog-card-body h3 a:hover {
  color: var(--blue-600);
}
.blog-card-body .blog-excerpt {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: var(--sp-md);
}
.blog-card-body .blog-meta {
  color: var(--text-muted);
  font-size: var(--text-xs);
}
.blog-card-body .blog-meta a {
  color: var(--blue-600);
  text-decoration: none;
}
.blog-card-body .blog-meta a:hover {
  text-decoration: underline;
}

/* Related Articles Section */
.related-articles {
  background: var(--bg-primary);
  padding: var(--sp-2xl) 0;
  margin-top: var(--sp-2xl);
}
.related-articles h2 {
  font-size: var(--text-2xl);
  color: var(--text-primary);
  margin-bottom: var(--sp-xl);
}
.related-articles .blog-card-body h3 {
  color: var(--text-primary);
}
.related-articles .blog-card-body h3 a {
  color: var(--text-primary);
  text-decoration: none;
}
.related-articles .blog-card-body h3 a:hover {
  color: var(--blue-600);
}

/* Category Badge in Article Header */
.page-header-inner .category-badge {
  display: inline-block;
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: #fff !important;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Word Count Badge */
.page-header-inner .word-count {
  color: rgba(255,255,255,0.6);
  font-size: var(--text-xs);
  margin-top: var(--sp-sm);
}

/* Reviewed by text */
.page-header-inner .reviewed-by {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-xs);
  margin-top: var(--sp-xs);
}

.article-content table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: var(--sp-lg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  font-size: var(--text-sm);
}
.article-content thead th {
  background: var(--gradient-blue);
  color: #fff;
  font-weight: 700;
  padding: var(--sp-md) var(--sp-lg);
  text-align: left;
  border: none;
}
.article-content tbody td {
  padding: var(--sp-md) var(--sp-lg);
  border-bottom: 1px solid var(--slate-100);
  background: #fff;
}
.article-content tbody tr:hover td { background: var(--slate-50); }

/* TOC */
.toc {
  background: var(--slate-50);
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-xl);
  margin: var(--sp-xl) 0;
}
.toc h3 { margin-bottom: var(--sp-md); font-size: var(--text-lg); }
.toc ol { padding-left: var(--sp-lg); }
.toc li { margin-bottom: var(--sp-sm); }
.toc a { color: var(--text-secondary); font-size: var(--text-sm); }
.toc a:hover { color: var(--blue-600); }

/* FAQ */
.faq-section { margin-top: var(--sp-2xl); }
.faq-item {
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-md);
  margin-bottom: var(--sp-md);
  overflow: hidden;
  background: #fff;
}
.faq-question {
  width: 100%;
  padding: var(--sp-lg);
  background: transparent;
  border: none;
  text-align: left;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
  font-family: var(--font-sans);
}
.faq-question:hover { background: var(--slate-50); }
.faq-question::after {
  content: '+';
  font-size: var(--text-xl);
  color: var(--blue-500);
  font-weight: 300;
  transition: transform var(--transition-base);
}
.faq-question[aria-expanded="true"]::after { content: '−'; color: var(--orange-500); }
.faq-answer { padding: 0 var(--sp-lg); max-height: 0; overflow: hidden; transition: all var(--transition-slow); }
.faq-answer.open { padding: 0 var(--sp-lg) var(--sp-lg); max-height: 2000px; }
.faq-answer p { color: var(--text-secondary); font-size: var(--text-sm); }

/* Author Box */
.author-box {
  display: flex; gap: var(--sp-lg); align-items: flex-start;
  padding: var(--sp-xl);
  background: var(--slate-50);
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-xl);
  margin: var(--sp-xl) 0;
}
.author-avatar {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--gradient-blue);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.author-info h4 { margin-bottom: var(--sp-xs); font-size: var(--text-lg); }
.author-info .credentials { font-size: var(--text-sm); color: var(--text-muted); margin-bottom: var(--sp-sm); }
.author-info .bio { font-size: var(--text-sm); color: var(--text-secondary); }

/* Team Member */
.team-member {
  display: flex; gap: var(--sp-xl);
  padding: var(--sp-xl);
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  margin-bottom: var(--sp-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
}
.team-member:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
.member-avatar {
  flex-shrink: 0; width: 90px; height: 90px; border-radius: 50%;
  background: var(--gradient-blue);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.member-info h3 { margin-bottom: var(--sp-xs); font-size: var(--text-lg); }
.member-info .member-title { font-size: var(--text-sm); color: var(--blue-600); font-weight: 600; margin-bottom: var(--sp-sm); }
.member-info p { font-size: var(--text-sm); }
@media (max-width: 640px) {
  .team-member { flex-direction: column; align-items: center; text-align: center; }
}

/* Blog Index Grid */
.blog-index {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--sp-xl) clamp(1.25rem, 4vw, 3rem);
}

/* Featured Post (spans full width) */
.blog-featured {
  grid-column: 1 / -1;
  background: var(--bg-secondary);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  display: grid;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .blog-featured { grid-template-columns: 1.2fr 1fr; }
}
.blog-featured:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}
.blog-featured-img {
  position: relative;
  overflow: hidden;
  min-height: 250px;
}
.blog-featured-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}
.blog-featured:hover .blog-featured-img img {
  transform: scale(1.03);
}
.blog-card-content {
  padding: var(--sp-2xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
@media (max-width: 767px) {
  .blog-card-content {
    padding: var(--sp-xl);
  }
}
.featured-badge {
  display: inline-block;
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: #fff;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  width: fit-content;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.blog-featured .blog-card-content h2 {
  font-size: var(--text-2xl);
  margin: 0 0 1rem;
  line-height: 1.3;
}
.blog-featured .blog-card-content h2 a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.blog-featured .blog-card-content h2 a:hover {
  color: var(--blue-600);
}
.blog-featured .blog-card-content .blog-excerpt {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}
.blog-featured .blog-card-content .blog-meta {
  margin-bottom: 1.5rem;
}

/* Blog Grid */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-lg);
  margin-top: var(--sp-xl);
}
@media (min-width: 640px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .blog-grid { grid-template-columns: repeat(3, 1fr); } }

/* Blog Card (grid style) */
.blog-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: translateY(30px) scale(0.96);
}
.blog-card.revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out), box-shadow var(--transition-base);
}
.blog-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-6px) scale(1.02);
}
.blog-card.revealed:hover {
  transform: translateY(-6px) scale(1.02);
}

.blog-card-img {
  width: 100%;
  height: 160px;
  background: linear-gradient(135deg, rgba(59,130,246,0.08) 0%, rgba(249,115,22,0.06) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.blog-card-img svg { width: 44px; height: 44px; opacity: 0.3; color: var(--blue-400); transition: all var(--transition-base); }
.blog-card:hover .blog-card-img svg { opacity: 0.5; transform: scale(1.1); }
.blog-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.04) 100%);
}

/* Color variants for card images */
.blog-card:nth-child(4n+1) .blog-card-img { background: linear-gradient(135deg, rgba(59,130,246,0.12) 0%, rgba(37,99,235,0.06) 100%); }
.blog-card:nth-child(4n+1) .blog-card-img svg { color: var(--blue-500); }
.blog-card:nth-child(4n+2) .blog-card-img { background: linear-gradient(135deg, rgba(249,115,22,0.12) 0%, rgba(234,88,12,0.06) 100%); }
.blog-card:nth-child(4n+2) .blog-card-img svg { color: var(--orange-500); }
.blog-card:nth-child(4n+3) .blog-card-img { background: linear-gradient(135deg, rgba(16,185,129,0.12) 0%, rgba(5,150,105,0.06) 100%); }
.blog-card:nth-child(4n+3) .blog-card-img svg { color: #059669; }
.blog-card:nth-child(4n+4) .blog-card-img { background: linear-gradient(135deg, rgba(139,92,246,0.12) 0%, rgba(99,102,241,0.06) 100%); }
.blog-card:nth-child(4n+4) .blog-card-img svg { color: #7c3aed; }

.blog-card-body { padding: var(--sp-lg); flex: 1; display: flex; flex-direction: column; }
.blog-card-body .badge {
  display: inline-block;
  align-self: flex-start;
  padding: var(--sp-xs) var(--sp-md);
  font-size: var(--text-xs);
  font-weight: 700;
  border-radius: var(--radius-full);
  background: var(--blue-50);
  color: var(--blue-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-sm);
}
.blog-card:nth-child(4n+2) .blog-card-body .badge { background: var(--orange-50); color: var(--orange-700); }
.blog-card:nth-child(4n+3) .blog-card-body .badge { background: #d1fae5; color: #047857; }
.blog-card:nth-child(4n+4) .blog-card-body .badge { background: #ede9fe; color: #6d28d9; }

.blog-card-body h3 {
  font-size: var(--text-base);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: var(--sp-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-body h3 a { color: var(--text-primary); }
.blog-card-body h3 a:hover { color: var(--blue-600); }
.blog-card-body .blog-excerpt {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--sp-md);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-body .blog-meta { display: flex; flex-wrap: wrap; gap: var(--sp-sm); font-size: var(--text-xs); color: var(--text-muted); margin-bottom: var(--sp-md); }

/* ==========================================
   SKELETON LOADING ANIMATION
   ========================================== */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--slate-100);
  border-radius: var(--radius-md);
}
.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.6) 50%, transparent 100%);
  animation: shimmer 1.5s ease-in-out infinite;
}
@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.skeleton-card {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.skeleton-card .skeleton-img { height: 160px; width: 100%; border-radius: 0; }
.skeleton-card .skeleton-body { padding: var(--sp-lg); }
.skeleton-card .skeleton-badge { width: 80px; height: 22px; border-radius: var(--radius-full); margin-bottom: var(--sp-md); }
.skeleton-card .skeleton-title { width: 85%; height: 20px; margin-bottom: var(--sp-sm); }
.skeleton-card .skeleton-text { width: 100%; height: 14px; margin-bottom: var(--sp-sm); }
.skeleton-card .skeleton-text:last-child { width: 60%; }
.skeleton-card .skeleton-meta { display: flex; gap: var(--sp-sm); margin-top: var(--sp-md); }
.skeleton-card .skeleton-meta span { width: 70px; height: 12px; border-radius: var(--radius-sm); }

.skeleton-hidden { display: none; }
.skeleton-visible .skeleton-card { animation: none; }

/* ==========================================
   FILTER BAR
   ========================================== */
.blog-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-xl);
  align-items: center;
}
.filter-btn {
  padding: var(--sp-sm) var(--sp-lg);
  background: transparent;
  border: 1.5px solid var(--slate-200);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--slate-500);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.filter-btn:hover { border-color: var(--blue-300); color: var(--blue-600); background: var(--blue-50); }
.filter-btn.active { background: var(--gradient-blue); color: #fff; border-color: transparent; box-shadow: 0 4px 12px rgba(59,130,246,0.25); }

/* ==========================================
   BACK TO TOP
   ========================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--gradient-blue);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(59,130,246,0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 100;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(59,130,246,0.45); }
.back-to-top svg { width: 20px; height: 20px; }

/* Calculator Forms */
.calculator-wrapper {
  background: var(--bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-2xl);
  margin: var(--sp-xl) 0;
  box-shadow: var(--shadow-card);
}
.calc-form { display: grid; gap: var(--sp-lg); }
.form-group { display: flex; flex-direction: column; gap: var(--sp-xs); }
.form-group label { font-weight: 600; font-size: var(--text-sm); color: var(--text-primary); }
.form-group .help-text { font-size: var(--text-xs); color: var(--text-muted); }
.form-group input, .form-group select {
  padding: var(--sp-md) var(--sp-lg);
  border: 1.5px solid var(--slate-200);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
  background: #fff;
}
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--blue-400);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.08);
}
.calc-results {
  background: var(--slate-50);
  border-radius: var(--radius-md);
  padding: var(--sp-xl);
  margin-top: var(--sp-lg);
  border: 1px solid var(--slate-100);
}
.result-highlight {
  background: var(--gradient-blue);
  color: #fff;
  border-radius: var(--radius-md);
  padding: var(--sp-lg);
  text-align: center;
  margin-bottom: var(--sp-lg);
  box-shadow: 0 8px 24px rgba(59,130,246,0.25);
}
.result-highlight .value { font-size: var(--text-3xl); font-weight: 900; }
.result-highlight .label { font-size: var(--text-sm); opacity: 0.85; }

/* Newsletter */
.newsletter {
  position: relative;
  overflow: hidden;
  background: var(--gradient-blue);
  color: #fff;
  padding: var(--sp-2xl) var(--sp-xl);
  border-radius: var(--radius-2xl);
  text-align: center;
  margin: var(--sp-2xl) 0;
  box-shadow: 0 12px 40px rgba(59,130,246,0.2);
}
.newsletter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 60%);
}
.newsletter > * { position: relative; z-index: 2; }
.newsletter h3 { color: #fff; margin-bottom: var(--sp-sm); font-size: var(--text-2xl); }
.newsletter p { color: rgba(255,255,255,0.85); max-width: 500px; margin: 0 auto var(--sp-lg); }
.newsletter-form {
  display: flex; flex-direction: column; gap: var(--sp-md);
  max-width: 440px; margin: 0 auto;
}
@media (min-width: 640px) { .newsletter-form { flex-direction: row; } }
.newsletter-form input {
  flex: 1;
  padding: var(--sp-md) var(--sp-lg);
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  background: rgba(255,255,255,0.12);
  color: #fff;
}
.newsletter-form input::placeholder { color: rgba(255,255,255,0.55); }
.newsletter-form input:focus {
  outline: none;
  border-color: rgba(255,255,255,0.5);
  box-shadow: 0 0 0 4px rgba(255,255,255,0.1);
}

/* Related Links */
.related-links {
  background: var(--slate-50);
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-xl);
  margin: var(--sp-xl) 0;
}
.related-links h3 { margin-bottom: var(--sp-md); }
.related-links ul { padding-left: 0; }
.related-links li { margin-bottom: var(--sp-sm); padding-left: var(--sp-lg); position: relative; }
.related-links li::before { content: '→'; position: absolute; left: 0; color: var(--blue-500); font-weight: 700; }

/* Disclaimer */
.disclaimer-box {
  background: var(--orange-50);
  border: 1px solid var(--orange-200);
  border-radius: var(--radius-md);
  padding: var(--sp-lg);
  margin: var(--sp-xl) 0;
  font-size: var(--text-sm);
  color: var(--orange-700);
}
.disclaimer-box strong { display: block; margin-bottom: var(--sp-xs); }

/* ==========================================
   SCROLL ANIMATIONS
   ========================================== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

.stagger-children > * {
  opacity: 0; transform: translateY(20px);
  animation: staggerFade 0.5s var(--ease-out) forwards;
}
.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.4s; }
@keyframes staggerFade { to { opacity: 1; transform: translateY(0); } }

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 767px) {
  .hero-saas { min-height: auto; padding: calc(var(--header-height) + var(--sp-2xl)) 0 var(--sp-3xl); }
  .hero-input-bar { flex-direction: column; }
  .hero-input-group { min-width: 100%; }
  .hero-cta-btn { width: 100%; }
  .feature-stats { margin-top: calc(-1 * var(--sp-xl)); }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ==========================================
   PRINT
   ========================================== */
@media print {
  .site-header, .site-footer, .cookie-banner, .hero-particles, .hero-ducts, .bg-mesh { display: none !important; }
  body { background: #fff; color: #000; }
  a { color: #000; text-decoration: underline; }
}

/* ==========================================
   ADVERTISING STYLES
   Centralized ad management system
   ========================================== */

/* Ad Container Base Styles */
.ad-container {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: var(--sp-2xl) auto;
  padding: 0;
  position: relative;
  background: transparent;
}

.ad-container:empty,
.ad-container .ad-dev-placeholder {
  margin: var(--sp-xl) auto;
}

/* Ad Wrapper */
.ad-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* Ad Label */
.ad-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 4px 8px;
  text-align: center;
  width: 100%;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

/* Ad Slot (ins element) */
.ad-slot {
  width: 100%;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.adsbygoogle {
  display: block !important;
  width: 100% !important;
}

/* Development Mode Placeholder */
.ad-dev-placeholder {
  width: 100%;
  background: var(--bg-secondary);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
}

/* Ad Loading State */
.ad-container.ad-loading::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: adShimmer 1.5s infinite;
}

@keyframes adShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ==========================================
   AD PLACEMENTS
   ========================================== */

/* Header Ad */
.ad-container-header {
  margin: var(--sp-lg) auto;
}

.ad-container-header .ad-wrapper {
  border-radius: var(--radius-md);
}

/* In-Content Ads */
.ad-container-in-content-1,
.ad-container-in-content-2,
.ad-container-IN_CONTENT_1,
.ad-container-IN_CONTENT_2 {
  margin: var(--sp-2xl) auto;
  padding: var(--sp-lg) 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.ad-container-in-content-1 .ad-label,
.ad-container-in-content-2 .ad-label,
.ad-container-IN_CONTENT_1 .ad-label,
.ad-container-IN_CONTENT_2 .ad-label {
  border-bottom: none;
  margin-bottom: var(--sp-sm);
}

/* Footer Ad */
.ad-container-footer {
  margin: var(--sp-xl) auto var(--sp-2xl);
}

.ad-container-footer .ad-wrapper {
  background: var(--bg-primary);
}

/* Blog Index Ad */
.ad-container-blog-index,
.ad-container-BLOG_INDEX {
  margin: var(--sp-2xl) 0;
}

/* Sidebar Ads */
.ad-container-sidebar,
.ad-container-sidebar-top,
.ad-container-sidebar-bottom,
.ad-container-SIDEBAR_TOP,
.ad-container-SIDEBAR_BOTTOM {
  margin: 0 0 var(--sp-xl);
  width: 300px;
  flex-shrink: 0;
}

.ad-container-sidebar .ad-wrapper,
.ad-container-sidebar-top .ad-wrapper,
.ad-container-sidebar-bottom .ad-wrapper,
.ad-container-SIDEBAR_TOP .ad-wrapper,
.ad-container-SIDEBAR_BOTTOM .ad-wrapper {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* Sticky Sidebar Ad */
.ad-sticky {
  position: sticky;
  top: calc(var(--header-height) + var(--sp-lg));
}

.ad-sticky.ad-container-SIDEBAR_BOTTOM,
.ad-sticky.ad-container-sidebar-bottom {
  position: static;
}

/* ==========================================
   CONTENT + SIDEBAR LAYOUT
   ========================================== */

.content-with-sidebar {
  display: flex;
  gap: var(--sp-2xl);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.content-with-sidebar .article-content,
.content-with-sidebar .content-container {
  flex: 1;
  min-width: 0;
}

.content-with-sidebar .content-sidebar {
  width: 300px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
}

/* ==========================================
   MOBILE ADJUSTMENTS
   ========================================== */

@media (max-width: 767px) {
  .ad-container {
    margin: var(--sp-xl) auto;
  }
  
  .ad-container-header {
    margin: var(--sp-md) auto;
  }
  
  .ad-container-sidebar,
  .ad-container-sidebar-top,
  .ad-container-sidebar-bottom,
  .ad-container-SIDEBAR_TOP,
  .ad-container-SIDEBAR_BOTTOM {
    width: 100%;
    max-width: 336px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .ad-sticky {
    position: static;
  }
  
  .ad-dev-placeholder {
    min-height: 100px !important;
  }
  
  .content-with-sidebar {
    flex-direction: column;
  }
  
  .content-with-sidebar .content-sidebar {
    width: 100%;
    order: 2;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .ad-container-sidebar,
  .ad-container-sidebar-top,
  .ad-container-sidebar-bottom,
  .ad-container-SIDEBAR_TOP,
  .ad-container-SIDEBAR_BOTTOM {
    width: 100%;
    max-width: 728px;
  }
}

/* ==========================================
   RESPONSIVE AD SIZES
   ========================================== */

/* Large leaderboard - desktop only */
@media (min-width: 1024px) {
  .ad-container-header .ad-wrapper {
    max-width: 970px;
  }
}

/* Medium rectangle - tablet */
@media (min-width: 768px) and (max-width: 1023px) {
  .ad-container-in-content-1,
  .ad-container-in-content-2,
  .ad-container-IN_CONTENT_1,
  .ad-container-IN_CONTENT_2 {
    max-width: 728px;
  }
}

/* Mobile banner - phones */
@media (max-width: 767px) {
  .ad-container-header .ad-wrapper {
    max-width: 320px;
  }
  
  .ad-container-in-content-1,
  .ad-container-in-content-2,
  .ad-container-IN_CONTENT_1,
  .ad-container-IN_CONTENT_2 {
    max-width: 336px;
  }
}

/* ==========================================
   AD SECTION DIVIDER
   ========================================== */

.ad-section-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-400), var(--orange-400));
  border-radius: 2px;
  margin: var(--sp-2xl) auto;
  opacity: 0.5;
}

/* ==========================================
   PRINT - HIDE ADS
   ========================================== */

@media print {
  .ad-container,
  .ad-dev-placeholder,
  .ad-section-divider {
    display: none !important;
  }
}

/* ==========================================
   REDUCED MOTION
   ========================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}