/* =============================================
   PRO STAR PLANET — Design System & Styles
   Ground-up rebuild — modern agency aesthetic
   ============================================= */

/* --- CSS Custom Properties --- */
:root {
  /* Brand Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;

  /* Neutrals */
  --color-dark: #0f172a;
  --color-dark-soft: #1e293b;
  --color-gray-900: #111827;
  --color-gray-800: #1f2937;
  --color-gray-700: #374151;
  --color-gray-600: #4b5563;
  --color-gray-500: #6b7280;
  --color-gray-400: #9ca3af;
  --color-gray-300: #d1d5db;
  --color-gray-200: #e5e7eb;
  --color-gray-100: #f3f4f6;
  --color-gray-50: #f9fafb;
  --color-white: #ffffff;

  /* Semantic */
  --color-success: #10b981;
  --color-radio: #ef4444;

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

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --container-wide: 1400px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 20px;
  --border-radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-glow: 0 0 40px rgba(37,99,235,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-gray-700);
  background: var(--color-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-dark);
  line-height: 1.2;
  font-weight: 700;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: var(--space-md);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

section {
  padding: var(--space-4xl) 0;
}

.section-dark {
  background: var(--color-dark);
  color: var(--color-gray-300);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-white);
}

.section-dark-soft {
  background: var(--color-dark-soft);
  color: var(--color-gray-300);
}

.section-dark-soft h2,
.section-dark-soft h3,
.section-dark-soft h4 {
  color: var(--color-white);
}

.section-light {
  background: var(--color-gray-50);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-header .label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.section-dark .section-header .label {
  color: var(--color-accent);
}

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

.section-header p {
  font-size: 1.125rem;
  color: var(--color-gray-500);
}

.section-dark .section-header p {
  color: var(--color-gray-400);
}

/* --- Grid Helpers --- */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-dark);
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
}

.btn-lg {
  padding: 1.125rem 2.5rem;
  font-size: 1.0625rem;
}

.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: all var(--transition-base);
}

.nav.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: var(--space-sm) 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-white);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-logo:hover {
  color: var(--color-white);
}

.nav-logo .logo-star {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-white);
}

.nav-cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: 0.625rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--color-primary-dark);
  color: var(--color-white) !important;
}

/* Mobile Nav */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-base);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: 5rem var(--space-xl) var(--space-xl);
    gap: var(--space-lg);
    transition: right var(--transition-slow);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-cta {
    width: 100%;
    text-align: center;
  }
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-dark) 0%, #0c1929 50%, #0f1b2d 100%);
  overflow: hidden;
  padding: var(--space-5xl) 0 var(--space-4xl);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(37, 99, 235, 0.3);
  color: var(--color-primary-light);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-xl);
  letter-spacing: 0.05em;
}

.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.03em;
}

.hero h1 .highlight {
  color: var(--color-accent);
}

.hero-sub {
  font-size: clamp(1.125rem, 2.5vw, 1.3125rem);
  color: var(--color-gray-400);
  line-height: 1.6;
  margin-bottom: var(--space-2xl);
  max-width: 580px;
}

.hero-stats {
  display: flex;
  gap: var(--space-3xl);
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat .number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
}

.hero-stat .label {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-top: var(--space-xs);
}

@media (max-width: 640px) {
  .hero-stats {
    gap: var(--space-xl);
  }
  .hero-stat .number {
    font-size: 1.5rem;
  }
}

/* --- Cards --- */
.card {
  background: var(--color-white);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-200);
}

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

.card-dark {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.card-dark:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  border-radius: var(--border-radius-sm);
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
}

.card-dark .card-icon {
  background: rgba(37, 99, 235, 0.15);
}

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

.card p {
  color: var(--color-gray-500);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

.card-dark p {
  color: var(--color-gray-400);
}

/* --- Service Cards --- */
.service-card {
  position: relative;
  overflow: hidden;
}

.service-card .card-number {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(37, 99, 235, 0.08);
  line-height: 1;
}

.card-dark .service-card .card-number,
.section-dark .card-number {
  color: rgba(255, 255, 255, 0.04);
}

/* --- Why Section / Feature Grid --- */
.feature-item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.feature-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  border-radius: var(--border-radius-sm);
  font-size: 1.25rem;
}

.feature-content h4 {
  margin-bottom: var(--space-xs);
}

.feature-content p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
  margin-bottom: 0;
}

/* --- Radio Section --- */
.radio-section {
  position: relative;
  background: linear-gradient(135deg, #1a0a0a 0%, #2d0a0a 50%, #1a0a0a 100%);
  overflow: hidden;
}

.radio-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(239, 68, 68, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.radio-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  letter-spacing: 0.05em;
}

.radio-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 900px) {
  .radio-grid {
    grid-template-columns: 1fr;
  }
}

.radio-content h2 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.radio-content p {
  color: var(--color-gray-400);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.radio-highlight {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}

.radio-highlight .highlight-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: #f87171;
  line-height: 1;
}

.radio-highlight .highlight-text {
  font-size: 1rem;
  color: var(--color-gray-300);
  margin-top: var(--space-xs);
}

.radio-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.radio-feature {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.radio-feature:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(239, 68, 68, 0.2);
}

.radio-feature h4 {
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.radio-feature p {
  color: var(--color-gray-400);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

/* --- Portfolio --- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 900px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
}

.portfolio-item {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-gray-100);
  cursor: pointer;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-item:hover img {
  transform: scale(1.05);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.9) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-xl);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-overlay h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--space-xs);
}

.portfolio-overlay span {
  color: var(--color-gray-400);
  font-size: 0.8125rem;
}

/* --- Process --- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  position: relative;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0.3;
}

@media (max-width: 900px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid::before {
    display: none;
  }
}

@media (max-width: 640px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}

.process-step {
  text-align: center;
  position: relative;
}

.process-number {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 800;
  font-size: 1.25rem;
  border-radius: 50%;
  margin: 0 auto var(--space-lg);
  position: relative;
  z-index: 2;
}

.process-step h4 {
  margin-bottom: var(--space-sm);
}

.process-step p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
}

/* --- City Expansion --- */
.expansion-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 900px) {
  .expansion-grid {
    grid-template-columns: 1fr;
  }
}

.expansion-visual {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.city-tag {
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--color-primary);
  padding: 0.625rem 1rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: center;
  transition: all var(--transition-base);
}

.city-tag:hover {
  background: rgba(37, 99, 235, 0.2);
  transform: translateY(-2px);
}

/* --- Reviews --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

@media (max-width: 900px) {
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

.review-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
}

.review-stars {
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: var(--space-md);
  letter-spacing: 2px;
}

.review-card blockquote {
  font-size: 0.9375rem;
  color: var(--color-gray-600);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  font-style: normal;
}

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

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.review-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-dark);
}

.review-role {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
}

/* --- CTA Section --- */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, #4f46e5 100%);
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

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

.cta-section p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.125rem;
  max-width: 580px;
  margin: 0 auto var(--space-2xl);
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-gray-400);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .nav-logo {
  margin-bottom: var(--space-lg);
  font-size: 1.25rem;
}

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.7;
}

.footer h4 {
  color: var(--color-white);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

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

.footer ul a {
  color: var(--color-gray-400);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer ul a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 0.875rem;
}

/* --- Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }
.fade-up-delay-5 { transition-delay: 0.5s; }

/* --- Utilities --- */
.text-center { text-align: center; }
.text-white { color: var(--color-white); }
.text-muted { color: var(--color-gray-500); }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mb-0 { margin-bottom: 0; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* --- Mobile Sticky CTA --- */
.mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  text-align: center;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.2);
}

.mobile-cta a {
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

@media (max-width: 900px) {
  .mobile-cta {
    display: block;
  }

  /* Extra bottom padding so content isn't hidden behind sticky CTA */
  .footer {
    padding-bottom: calc(var(--space-xl) + 60px);
  }

  /* Tighten section padding on mobile */
  section {
    padding: var(--space-3xl) 0;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--space-5xl) + 1rem) 0 var(--space-3xl);
  }

  .hero h1 {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
  }

  .hero-sub {
    font-size: 1rem;
  }

  .section-header {
    margin-bottom: var(--space-2xl);
  }

  .feature-item {
    flex-direction: column;
    gap: var(--space-md);
  }

  .expansion-visual {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
    text-align: center;
  }

  .expansion-visual {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Selection color --- */
::selection {
  background: rgba(37, 99, 235, 0.2);
  color: var(--color-dark);
}

/* --- Focus visible for accessibility --- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--color-gray-600);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-500);
}