/* ==========================================================================
   AI Teacher Toolkit Pro — v3 Styles
   A premium EdTech website design
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */

:root {
  /* Colors - Primary */
  --color-navy: #1A365D;
  --color-navy-light: #234876;
  --color-navy-dark: #0F2341;
  
  /* Colors - Accent */
  --color-teal: #0891B2;
  --color-teal-light: #22D3EE;
  --color-teal-dark: #0E7490;
  --color-coral: #F97316;
  --color-emerald: #059669;
  
  /* Colors - Neutrals */
  --color-white: #FFFFFF;
  --color-cream: #FAFBFC;
  --color-slate-50: #F8FAFC;
  --color-slate-100: #F1F5F9;
  --color-slate-200: #E2E8F0;
  --color-slate-300: #CBD5E1;
  --color-slate-400: #94A3B8;
  --color-slate-500: #64748B;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1E293B;
  --color-slate-900: #0F172A;
  
  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0F2341 0%, #1A365D 40%, #0E7490 100%);
  --gradient-cta: linear-gradient(135deg, #0891B2 0%, #0E7490 100%);
  --gradient-warm: linear-gradient(135deg, #F97316 0%, #EA580C 100%);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 40px rgba(8, 145, 178, 0.15);
  
  /* Borders */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* --------------------------------------------------------------------------
   Base Reset
   -------------------------------------------------------------------------- */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-slate-700);
  background: var(--color-white);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-slate-900);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 5vw, var(--text-5xl)); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.75rem, 4vw, var(--text-4xl)); letter-spacing: -0.02em; }
h3 { font-size: clamp(1.25rem, 3vw, var(--text-2xl)); }
h4 { font-size: var(--text-xl); }

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: var(--text-lg);
  color: var(--color-slate-600);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-16) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-24) 0;
  }
}

.section-alt {
  background: var(--color-slate-50);
}

.section-dark {
  background: var(--gradient-hero);
  color: var(--color-white);
}

.section-dark h2,
.section-dark h3 {
  color: var(--color-white);
}

.text-center {
  text-align: center;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-cta);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.logo-icon svg {
  width: 24px;
  height: 24px;
}

.logo-text {
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-navy);
}

.nav-links {
  display: none;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-weight: 500;
  color: var(--color-slate-600);
  transition: color var(--duration-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-teal);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-teal);
  border-radius: 1px;
}

.btn-nav {
  padding: var(--space-2) var(--space-5);
  background: var(--gradient-cta);
  color: white !important;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: transform var(--duration-fast), box-shadow var(--duration-fast);
}

.btn-nav:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(8, 145, 178, 0.3);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-slate-700);
  border-radius: 2px;
  transition: all var(--duration-fast);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  background: white;
  padding: var(--space-6);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-lg);
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu a {
  display: block;
  padding: var(--space-3) 0;
  font-weight: 500;
  color: var(--color-slate-700);
  border-bottom: 1px solid var(--color-slate-100);
}

.mobile-menu .btn {
  margin-top: var(--space-4);
  width: 100%;
  text-align: center;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-base);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-cta);
  color: white;
  box-shadow: 0 4px 14px -3px rgba(8, 145, 178, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px -3px rgba(8, 145, 178, 0.5);
}

.btn-secondary {
  background: white;
  color: var(--color-navy);
  border: 2px solid var(--color-navy);
}

.btn-secondary:hover {
  background: var(--color-navy);
  color: white;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
}

.btn-coral {
  background: var(--gradient-warm);
  color: white;
  box-shadow: 0 4px 14px -3px rgba(249, 115, 22, 0.4);
}

.btn-coral:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px -3px rgba(249, 115, 22, 0.5);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -10%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(8, 145, 178, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, rgba(15, 35, 65, 0.5), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  padding: var(--space-8) 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-teal-light);
  margin-bottom: var(--space-6);
  backdrop-filter: blur(4px);
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

.hero h1 {
  color: white;
  font-size: clamp(2.5rem, 6vw, 4rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-teal-light) 0%, #5EEAD4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl));
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 560px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-6);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
}

.trust-item svg {
  width: 20px;
  height: 20px;
  color: var(--color-emerald);
}

/* Hero Graphic */
.hero-graphic {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  z-index: 1;
}

@media (min-width: 1024px) {
  .hero-graphic {
    display: block;
  }
}

.hero-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transform: rotate(-5deg);
}

.hero-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  width: 320px;
  transition: transform var(--duration-normal) var(--ease-out);
}

.hero-card:hover {
  transform: translateX(-8px);
}

.hero-card-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-cta);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hero-card-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.hero-card h3 {
  color: white;
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.hero-card p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Section Headers
   -------------------------------------------------------------------------- */

.section-header {
  max-width: 680px;
  margin: 0 auto var(--space-12);
  text-align: center;
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  color: var(--color-slate-600);
  font-size: var(--text-lg);
}

.section-header.light h2,
.section-header.light p {
  color: white;
}

.section-header.light p {
  opacity: 0.85;
}

/* --------------------------------------------------------------------------
   Problems Section
   -------------------------------------------------------------------------- */

.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.problem-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
}

.problem-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.problem-icon {
  width: 64px;
  height: 64px;
  background: var(--color-slate-50);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
}

.problem-icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-teal);
}

.problem-card h3 {
  margin-bottom: var(--space-3);
}

.problem-card p {
  color: var(--color-slate-600);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Solution Section
   -------------------------------------------------------------------------- */

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
}

.solution-item {
  position: relative;
  padding-left: var(--space-16);
}

.solution-number {
  position: absolute;
  left: 0;
  top: -8px;
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--color-slate-100);
  line-height: 1;
}

.solution-item h3 {
  margin-bottom: var(--space-2);
  color: var(--color-navy);
}

.solution-item p {
  color: var(--color-slate-600);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Categories Section
   -------------------------------------------------------------------------- */

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-6);
}

.category-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-cta);
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-out);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-slate-50) 0%, var(--color-slate-100) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.category-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-teal);
}

.category-card h3 {
  margin-bottom: var(--space-3);
}

.category-card p {
  color: var(--color-slate-600);
  margin-bottom: var(--space-4);
}

.category-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-slate-100);
}

.category-count {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-teal);
  background: rgba(8, 145, 178, 0.1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.category-link {
  font-weight: 600;
  color: var(--color-teal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--duration-fast);
}

.category-link:hover {
  gap: var(--space-2);
}

.category-link svg {
  width: 16px;
  height: 16px;
}

/* --------------------------------------------------------------------------
   Testimonials
   -------------------------------------------------------------------------- */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}

.testimonial-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  font-size: 5rem;
  font-family: Georgia, serif;
  color: var(--color-slate-100);
  line-height: 1;
}

.testimonial-quote {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-slate-700);
  margin-bottom: var(--space-6);
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  background: var(--gradient-cta);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-lg);
}

.testimonial-info p {
  margin: 0;
}

.testimonial-name {
  font-weight: 600;
  color: var(--color-slate-900);
}

.testimonial-title {
  font-size: var(--text-sm);
  color: var(--color-slate-500);
}

/* --------------------------------------------------------------------------
   Stats Section
   -------------------------------------------------------------------------- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
  text-align: center;
}

.stat-item {
  padding: var(--space-6);
}

.stat-value {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-5xl));
  font-weight: 800;
  color: var(--color-teal-light);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.8);
}

/* --------------------------------------------------------------------------
   Pricing
   -------------------------------------------------------------------------- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  transition: transform var(--duration-normal) var(--ease-out);
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  border: 2px solid var(--color-teal);
  transform: scale(1.02);
  box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-cta);
  color: white;
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}

.pricing-price {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-navy);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.pricing-period {
  font-size: var(--text-sm);
  color: var(--color-slate-500);
  margin-bottom: var(--space-6);
}

.pricing-features {
  text-align: left;
  margin-bottom: var(--space-6);
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  color: var(--color-slate-600);
}

.pricing-features li svg {
  width: 20px;
  height: 20px;
  color: var(--color-emerald);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-card .btn {
  width: 100%;
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */

.cta-section {
  text-align: center;
  padding: var(--space-20) var(--space-6);
}

.cta-section h2 {
  color: white;
  margin-bottom: var(--space-4);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto var(--space-8);
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

/* Trust Badges */
.trust-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-8);
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-sm);
}

.trust-badge svg {
  width: 20px;
  height: 20px;
  color: var(--color-teal-light);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.footer {
  background: var(--color-slate-900);
  color: var(--color-slate-400);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.footer-brand .logo {
  margin-bottom: var(--space-4);
}

.footer-brand .logo-text {
  color: white;
}

.footer-brand p {
  max-width: 300px;
  margin: 0;
}

.footer-links h4 {
  color: white;
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
}

.footer-links a {
  display: block;
  padding: var(--space-2) 0;
  transition: color var(--duration-fast);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-slate-800);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.footer-bottom p {
  margin: 0;
  font-size: var(--text-sm);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: var(--color-slate-800);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-fast);
}

.footer-social a:hover {
  background: var(--color-teal);
}

.footer-social svg {
  width: 18px;
  height: 18px;
}

/* --------------------------------------------------------------------------
   Page Header (Products, About)
   -------------------------------------------------------------------------- */

.page-header {
  background: var(--gradient-hero);
  padding: calc(80px + var(--space-16)) 0 var(--space-16);
  text-align: center;
  color: white;
}

.page-header h1 {
  color: white;
  margin-bottom: var(--space-4);
}

.page-header p {
  max-width: 600px;
  margin: 0 auto;
  font-size: var(--text-lg);
  opacity: 0.9;
}

/* --------------------------------------------------------------------------
   Products Grid
   -------------------------------------------------------------------------- */

.products-section h2 {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.products-section h2 svg {
  width: 32px;
  height: 32px;
  color: var(--color-teal);
}

.section-description {
  color: var(--color-slate-600);
  margin-bottom: var(--space-8);
  max-width: 700px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.product-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.product-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.product-card p {
  color: var(--color-slate-600);
  font-size: var(--text-sm);
  flex-grow: 1;
  margin-bottom: var(--space-4);
}

.product-price {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-teal);
}

.bundle-cta {
  text-align: center;
  margin-top: var(--space-8);
  padding: var(--space-6);
  background: var(--color-slate-50);
  border-radius: var(--radius-xl);
}

.bundle-cta span {
  color: var(--color-slate-600);
}

.bundle-cta .product-price {
  margin: 0 var(--space-2);
}

/* --------------------------------------------------------------------------
   About Page
   -------------------------------------------------------------------------- */

.about-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-16) var(--space-6);
}

.about-content h2 {
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-slate-100);
}

.about-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.about-content p {
  color: var(--color-slate-700);
  line-height: 1.8;
}

.credentials-list {
  margin: var(--space-4) 0;
  padding-left: var(--space-6);
}

.credentials-list li {
  padding: var(--space-2) 0;
  color: var(--color-slate-700);
  position: relative;
}

.credentials-list li::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-6));
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--color-teal);
  border-radius: 50%;
}

.contact-box {
  background: var(--color-slate-50);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-top: var(--space-8);
}

.contact-box h3 {
  margin-bottom: var(--space-4);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.6s var(--ease-out) forwards;
}

.fade-in-up {
  animation: fadeInUp 0.6s var(--ease-out) forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */

@media print {
  .nav,
  .footer,
  .btn {
    display: none !important;
  }
  
  body {
    color: black;
    background: white;
  }
  
  .hero {
    background: none;
    color: black;
    min-height: auto;
    padding: 2rem 0;
  }
  
  .hero h1,
  .section-dark h2 {
    color: black;
  }
}