/* ============================================================
   SolutionMall — Hybrid Cable Website
   Main Stylesheet (style.css)
   Deep Blue Professional Theme
   ============================================================ */

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #050f1e;
  color: #e8f0fe;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---- CSS Variables ---- */
:root {
  --navy-900: #050f1e;
  --navy-800: #0a1929;
  --navy-700: #0d2137;
  --navy-600: #102a47;
  --navy-500: #1a3a5c;
  --blue-700: #1565C0;
  --blue-600: #1976D2;
  --blue-500: #2196F3;
  --blue-400: #42A5F5;
  --blue-300: #90CAF9;
  --accent: #00B0FF;
  --accent-hover: #0091EA;
  --white: #ffffff;
  --gray-100: #f0f4f8;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e0;
  --gray-400: #a0aec0;
  --gray-500: #718096;
  --gray-600: #4a5568;
  --text-primary: rgba(255,255,255,0.96);
  --text-secondary: rgba(255,255,255,0.72);
  --text-muted: rgba(255,255,255,0.48);
  --border: rgba(255,255,255,0.08);
  --card-bg: rgba(255,255,255,0.04);
  --card-hover: rgba(255,255,255,0.08);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
  --container: 1200px;
  --header-h: 72px;
}

/* ---- Container ---- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }
h5 { font-size: 0.9375rem; font-weight: 600; }
p { color: var(--text-secondary); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: var(--blue-600);
  color: var(--white);
  border-color: var(--blue-600);
}
.btn-primary:hover {
  background: var(--blue-500);
  border-color: var(--blue-500);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(33,150,243,0.4);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--accent);
  color: var(--navy-900);
  border-color: var(--accent);
  font-weight: 700;
}
.btn-accent:hover {
  background: #33BFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,176,255,0.4);
}
.btn-sm { padding: 8px 18px; font-size: 0.875rem; }
.btn-lg { padding: 16px 36px; font-size: 1rem; }

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(5,15,30,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(5,15,30,0.97);
  box-shadow: var(--shadow-md);
}
.header-inner {
  display: flex;
  align-items: center;
  height: var(--header-h);
  gap: 24px;
}

/* Logo */
.logo-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-img {
  height: 32px;
  width: auto;
  /* white logo used for dark header/footer */
}
.logo-url {
  font-size: 0.6875rem;
  color: var(--blue-300);
  letter-spacing: 0.02em;
  margin-top: 2px;
  transition: color var(--transition);
}
.logo-block:hover .logo-url { color: var(--accent); }

/* Nav */
.main-nav { flex: 1; }
.main-nav > ul {
  display: flex;
  align-items: center;
  gap: 2px;
  justify-content: center;
  flex-wrap: nowrap;
}
.main-nav > ul > li {
  position: relative;
}
.main-nav > ul > li > a {
  display: block;
  padding: 6px 10px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.main-nav > ul > li > a:hover,
.main-nav > ul > li.active > a {
  color: var(--white);
  background: var(--card-bg);
}

/* Dropdown */
.main-nav .has-dropdown { position: relative; }
.main-nav .dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  min-width: 200px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  transform: translateX(-50%) translateY(-8px);
  box-shadow: var(--shadow-lg);
  z-index: 100;
}
.main-nav .has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.main-nav .dropdown li a {
  display: block;
  padding: 10px 16px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.main-nav .dropdown li a:hover {
  color: var(--white);
  background: var(--card-hover);
}

/* Header Right */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.lang-switcher select {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}
.lang-switcher select:hover { border-color: var(--blue-400); }
.lang-switcher select option { background: var(--navy-800); color: var(--white); }

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---- Hero Section ---- */
.hero-section {
  position: relative;
  min-height: 68vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--header-h);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(5,15,30,0.92) 0%,
    rgba(10,25,41,0.85) 40%,
    rgba(21,101,192,0.3) 100%
  );
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(33,150,243,0.15);
  border: 1px solid rgba(33,150,243,0.3);
  color: var(--blue-300);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--white);
}
.hero-title .highlight {
  color: var(--accent);
  display: block;
}
.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 600px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.stat-item { text-align: left; }
.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---- Section Common ---- */
.section {
  padding: 80px 0;
}
.section-alt {
  background: var(--navy-800);
}
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}
.section-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-600), var(--accent));
  margin: 16px auto 0;
  border-radius: 2px;
}

/* ---- Overview Cards ---- */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}
.overview-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.overview-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: var(--card-hover);
}
.overview-icon {
  width: 52px;
  height: 52px;
  background: rgba(33,150,243,0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.overview-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 10px;
}
.overview-card p {
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* ---- Products Section ---- */
.products-section { padding: 80px 0; }
.product-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}
.tab-btn {
  padding: 10px 22px;
  border-radius: 50px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn:hover { border-color: var(--blue-400); color: var(--white); }
.tab-btn.active {
  background: var(--blue-600);
  border-color: var(--blue-600);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(25,118,210,0.4);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.product-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.product-card-body { padding: 20px; }
.product-card-body h4 { font-size: 1rem; margin-bottom: 8px; }
.product-card-body p { font-size: 0.875rem; color: var(--text-muted); }
.product-tag {
  display: inline-block;
  background: rgba(33,150,243,0.15);
  color: var(--blue-300);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 50px;
  margin-bottom: 10px;
}

/* ---- Scenarios ---- */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.scenario-card {
  display: block;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.scenario-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-card:hover img { transform: scale(1.05); }
.scenario-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5,15,30,0.9) 0%, rgba(5,15,30,0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
}
.scenario-overlay h3 { font-size: 1.25rem; margin-bottom: 6px; }
.scenario-overlay p { font-size: 0.875rem; color: var(--text-secondary); }

/* ---- Solutions ---- */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.solution-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}
.solution-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.solution-card-body { padding: 24px; }
.solution-card-body h3 { font-size: 1.125rem; margin-bottom: 10px; }
.solution-card-body p { font-size: 0.9375rem; color: var(--text-secondary); margin-bottom: 20px; }
.solution-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.solution-tag {
  background: rgba(33,150,243,0.1);
  color: var(--blue-300);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
  border: 1px solid rgba(33,150,243,0.2);
}
.solution-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: gap var(--transition);
}
.solution-link:hover { gap: 10px; }

/* ---- Selection Guide ---- */
.selection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 40px;
}
.selection-step {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  position: relative;
}
.step-num {
  width: 40px;
  height: 40px;
  background: var(--blue-600);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin: 0 auto 16px;
}
.selection-step h4 { margin-bottom: 10px; }
.selection-step p { font-size: 0.875rem; }

/* ---- Insights ---- */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.insight-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform var(--transition), background var(--transition);
}
.insight-card:hover {
  transform: translateY(-3px);
  background: var(--card-hover);
}
.insight-icon {
  font-size: 1.75rem;
  margin-bottom: 14px;
}
.insight-card h4 { font-size: 1rem; margin-bottom: 8px; }
.insight-card p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.65; }

/* ---- Safety Section ---- */
.safety-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}
.safety-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue-500);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: transform var(--transition), background var(--transition);
}
.safety-card:hover {
  transform: translateY(-3px);
  background: var(--card-hover);
}
.safety-card.risk-high { border-left-color: #ef5350; }
.safety-card.risk-medium { border-left-color: #FFA726; }
.safety-card.risk-low { border-left-color: #66BB6A; }
.safety-icon { font-size: 1.75rem; margin-bottom: 12px; }
.safety-card h4 { font-size: 1rem; margin-bottom: 8px; }
.safety-card p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.65; }
.risk-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 50px;
  margin-top: 10px;
}
.risk-badge.high { background: rgba(239,83,80,0.15); color: #ef9a9a; }
.risk-badge.medium { background: rgba(255,167,38,0.15); color: #FFCC80; }
.risk-badge.low { background: rgba(102,187,106,0.15); color: #A5D6A7; }

/* Compliance Table */
.compliance-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin-top: 32px;
}
.compliance-table th {
  background: var(--navy-700);
  color: var(--text-primary);
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--blue-600);
}
.compliance-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}
.compliance-table tr:hover td { background: var(--card-bg); }
.cert-badge {
  display: inline-block;
  background: rgba(33,150,243,0.12);
  color: var(--blue-300);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  margin: 2px;
}

/* ---- Calculators ---- */
.calc-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.calc-tab {
  padding: 10px 22px;
  border-radius: 50px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.calc-tab:hover { border-color: var(--blue-400); color: var(--white); }
.calc-tab.active {
  background: var(--blue-600);
  border-color: var(--blue-600);
  color: var(--white);
}
.calc-panel { display: none; }
.calc-panel.active { display: block; }
.calc-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  max-width: 800px;
  margin: 0 auto;
}
.calc-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.form-group input,
.form-group select {
  width: 100%;
  background: var(--navy-700);
  border: 1px solid var(--border);
  color: var(--white);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus { border-color: var(--blue-400); }
.form-group select option { background: var(--navy-800); }
.calc-result {
  background: var(--navy-700);
  border: 1px solid var(--blue-600);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
  display: none;
}
.calc-result.visible { display: block; }
.result-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
}
.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9375rem;
}
.result-item:last-child { border-bottom: none; }
.result-item .label { color: var(--text-secondary); }
.result-item .value { font-weight: 600; color: var(--white); }
.result-item .value.highlight { color: var(--accent); font-size: 1.125rem; }

/* ---- Calculator Intro Cards ---- */
.calc-intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-top: 8px;
}
.calc-intro-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.calc-intro-card:hover {
  border-color: rgba(59,130,246,0.5);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.3);
}
.calc-intro-icon {
  font-size: 2.2rem;
  margin-bottom: 18px;
  line-height: 1;
}
.calc-intro-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}
.calc-intro-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
}
.calc-intro-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px 0;
}
.calc-intro-features li {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.65);
  padding: 5px 0;
  padding-left: 20px;
  position: relative;
}
.calc-intro-features li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: #34d399;
  font-weight: 700;
}
.calc-intro-btn {
  display: inline-block;
  text-align: center;
  margin-top: auto;
}

/* ---- CTA Section ---- */
.cta-section,
#cta .cta-box {
  background: linear-gradient(135deg, var(--navy-700) 0%, var(--blue-700) 100%);
  padding: 80px 0;
  text-align: center;
}
#cta { background: linear-gradient(135deg, var(--navy-700) 0%, var(--blue-700) 100%); }
.cta-section h2, #cta .cta-box h2 { margin-bottom: 16px; }
.cta-section p, #cta .cta-box p { color: var(--text-secondary); margin-bottom: 56px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 28px; justify-content: center; flex-wrap: wrap; }

/* ---- Footer ---- */
.site-footer {
  background: var(--navy-900);
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-logo {
  height: 36px;
  width: auto;
  filter: brightness(0) invert(1);
  margin-bottom: 12px;
}
.footer-url {
  display: block;
  color: var(--blue-300);
  font-size: 0.875rem;
  margin-bottom: 16px;
  transition: color var(--transition);
}
.footer-url:hover { color: var(--accent); }
.footer-brand p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.7; }
.footer-links h5 {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-links ul li { margin-bottom: 10px; }
.footer-links ul li a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-links ul li a:hover { color: var(--white); }
.footer-contact h5 {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-contact ul li { margin-bottom: 10px; }
.footer-contact ul li a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-contact ul li a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.8125rem; color: var(--text-muted); }
.footer-socials {
  display: flex;
  align-items: center;
  gap: 12px;
}
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.social-icon:hover {
  background: var(--accent);
  color: var(--white);
}

/* ---- Reveal Animation ---- */
.reveal {
  opacity: 1;
  transform: none;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .main-nav { display: none; }
  .main-nav.open { display: block; position: fixed; top: var(--header-h); left: 0; right: 0; background: var(--navy-800); padding: 16px; border-bottom: 1px solid var(--border); }
  .main-nav.open > ul { flex-direction: column; gap: 4px; }
  .main-nav .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: var(--navy-900); margin-top: 4px; }
  .mobile-menu-btn { display: flex; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 56px 0; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn { justify-content: center; }
}

/* ---- Scene Detail Panel ---- */
.scene-detail {
  margin-top: 32px;
  background: var(--navy-800);
  border: 1px solid var(--accent);
  border-radius: 16px;
  padding: 32px;
  animation: fadeInUp 0.35s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.scene-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}
.scene-detail-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  margin: 0;
}
.scene-close-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.scene-close-btn:hover {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}
.scene-detail-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}
.scene-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.scene-block {
  background: var(--navy-900);
  border-radius: 10px;
  padding: 18px 20px;
}
.scene-block-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 10px;
}
.scene-block-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}
.scene-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.scene-list li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}
.scene-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.scene-detail-footer {
  display: flex;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.scenario-card {
  cursor: pointer;
}
.scenario-card.active {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
@media (max-width: 768px) {
  .scene-detail-body { grid-template-columns: 1fr; }
  .scene-detail { padding: 20px; }
}