/* ============================================
   BOSS - BITBOX Operating System Software
   Landing Page Stylesheet
   ============================================ */

/* --- CSS Variables (Light Theme - default) --- */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #3b82f6;
  --accent: #06b6d4;
  --accent-dark: #0891b2;

  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;

  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #f8fafc;

  --border: #e2e8f0;
  --border-light: #f1f5f9;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);

  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --nav-height: 64px;
  --nav-bg: rgba(255, 255, 255, 0.85);
  --nav-border: rgba(226, 232, 240, 0.8);
  --nav-shadow: 0 1px 3px rgba(0,0,0,0.05);

  --transition: 0.3s ease;
  --transition-fast: 0.15s ease;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  --bg: #0a0e1a;
  --bg-alt: #111827;
  --bg-card: #1e293b;
  --bg-input: #1e293b;

  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --border: #1e293b;
  --border-light: #273548;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.5), 0 8px 10px -6px rgba(0,0,0,0.4);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.6);

  --nav-bg: rgba(10, 14, 26, 0.92);
  --nav-border: rgba(30, 41, 59, 0.8);
  --nav-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

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

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

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

ul { list-style: none; }

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* =============================================
   NAVBAR
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.nav {
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--nav-border);
  transition: all var(--transition);
}

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

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 16px;
}

/* Brand */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon {
  font-size: 1.5rem;
  color: var(--primary);
  filter: drop-shadow(0 0 4px rgba(37, 99, 235, 0.4));
}

.brand-text {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
}

.brand-sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-left: -4px;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.06);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
  font-weight: 600;
}

/* Nav Toggle (hamburger) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: rgba(37, 99, 235, 0.08);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

.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);
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
}

.icon-sun, .icon-moon { width: 18px; height: 18px; }
.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(10, 14, 26, 0.92) 0%,
    rgba(15, 23, 42, 0.88) 40%,
    rgba(37, 99, 235, 0.4) 100%
  );
}

[data-theme="light"] .hero-bg::after {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(248, 250, 252, 0.92) 40%,
    rgba(37, 99, 235, 0.15) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0 120px;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 28px;
  letter-spacing: 0.3px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
  color: var(--text);
}

.title-accent {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.2em;
}

.hero-description {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 560px;
}

/* Hero Buttons */
.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.45);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-alt);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

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

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

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.82rem;
}

.btn-active {
  background: var(--primary) !important;
  color: #fff !important;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 40px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -1px;
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  text-align: center;
}

.scroll-indicator {
  width: 28px;
  height: 44px;
  border: 2px solid var(--text-muted);
  border-radius: 14px;
  position: relative;
  margin: 0 auto;
}

.scroll-indicator span {
  display: block;
  width: 4px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-bounce 2s infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(12px); opacity: 0.3; }
}

/* =============================================
   SECTIONS COMMON
   ============================================= */
.section {
  padding: 100px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.subsection-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin: 48px 0 24px;
  padding-left: 16px;
  border-left: 3px solid var(--primary);
}

/* =============================================
   FEATURES GRID
   ============================================= */
.features-section {
  background: var(--bg-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  position: relative;
  padding: 32px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  text-decoration: none;
  display: block;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.2);
}

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

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  line-height: 1;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =============================================
   PARALLAX GALLERY
   ============================================= */
.parallax-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  perspective: 1000px;
}

.parallax-gallery.gallery-2col {
  grid-template-columns: repeat(2, 1fr);
}

.parallax-gallery.gallery-3col {
  grid-template-columns: repeat(3, 1fr);
}

.parallax-item {
  will-change: transform;
  transition: transform 0.1s linear;
}

.parallax-item.parallax-wide {
  grid-column: 1 / -1;
}

/* Gallery Item */
.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  cursor: pointer;
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(37, 99, 235, 0.3);
}

.gallery-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top;
  transition: transform 0.5s ease;
}

.parallax-wide .gallery-img {
  height: 360px;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.03);
}

/* Gallery Overlay */
.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.5) 70%, transparent 100%);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transform: translateY(100%);
  transition: transform var(--transition);
}

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

.gallery-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
}

.gallery-desc {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.4;
}

/* =============================================
   LIGHTBOX
   ============================================= */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox.lightbox-open {
  display: flex;
  animation: fadeIn 0.3s ease;
}

.lightbox-content {
  position: relative;
  max-width: 1100px;
  max-height: 90vh;
  width: 100%;
  text-align: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
}

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  z-index: 2001;
}

.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
  transform: scale(1.1);
}

.lightbox-close svg {
  width: 20px;
  height: 20px;
}

.lightbox-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: none;
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  z-index: 2001;
}

.lightbox-nav:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-50%) scale(1.1);
}

.lightbox-nav svg {
  width: 24px;
  height: 24px;
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

/* =============================================
   VIDEO SECTION
   ============================================= */
.video-section {
  background: var(--bg);
}

.video-container {
  max-width: 900px;
  margin: 0 auto;
}

.video-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  background: #000;
  border: 1px solid var(--border);
}

.video-wrapper video {
  display: block;
  width: 100%;
  height: auto;
}

.video-controls {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.music-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.music-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.music-toggle.active {
  background: rgba(37, 99, 235, 0.1);
  border-color: var(--primary);
  color: var(--primary);
}

.music-toggle svg {
  width: 18px;
  height: 18px;
}

.video-description {
  text-align: center;
  margin-top: 20px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
  background: linear-gradient(135deg, #1e3a5f, #0f172a);
  padding: 100px 0;
}

[data-theme="light"] .cta-section {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
}

.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

[data-theme="light"] .cta-title {
  color: var(--text);
}

.cta-description {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 36px;
  line-height: 1.7;
}

[data-theme="light"] .cta-description {
  color: var(--text-secondary);
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-section .btn-secondary {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-color: rgba(255,255,255,0.25);
}

.cta-section .btn-secondary:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}

[data-theme="light"] .cta-section .btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}

[data-theme="light"] .cta-section .btn-secondary:hover {
  background: var(--bg-alt);
  border-color: var(--primary);
  color: var(--primary);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 60px 0 24px;
}

.footer-content {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 48px;
  align-items: start;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand .brand-icon {
  font-size: 1.3rem;
}

.footer-brand .brand-text {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text);
}

.footer-brand .brand-sub {
  font-size: 0.65rem;
}

.footer-info {
  max-width: 340px;
}

.footer-tagline {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.footer-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 40px;
}

.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-col span {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* =============================================
   REVEAL ANIMATION
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    overflow-y: auto;
    z-index: 999;
  }

  .nav-menu.nav-open {
    display: flex;
    animation: fadeIn 0.3s ease;
  }

  .nav-menu .nav-link {
    padding: 14px 16px;
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

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

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

  .footer-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .hero-content {
    padding: 60px 0 80px;
  }

  .hero-stats {
    gap: 24px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .parallax-gallery,
  .parallax-gallery.gallery-2col,
  .parallax-gallery.gallery-3col {
    grid-template-columns: 1fr;
  }

  .gallery-img,
  .parallax-wide .gallery-img {
    height: 200px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .hero-title {
    font-size: 2rem;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .cta-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 20px;
  }

  .lightbox {
    padding: 16px;
  }

  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }