:root {
  --bg-primary: #1b1c19;
  --bg-secondary: #232520;
  --bg-card: #2a2c25;
  --bg-input: #1e201b;
  --border: #3d3f35;
  --text-primary: #e6e4d8;
  --text-secondary: #9e9c8a;
  --text-muted: #6e6d5e;
  --accent: #c5a332;
  --accent-hover: #dbb942;
  --danger: #c0392b;
  --success: #5a8a3c;
  --warning: #c9902b;
  --radius: 6px;
  --transition: 0.18s ease;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --stripe-gold: linear-gradient(90deg, transparent, var(--accent), transparent);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("https://img.daydev.ru/yeBu9/wahAXAHA47.png/raw") center / cover no-repeat fixed;
  opacity: 0.15;
  z-index: 0;
  pointer-events: none;
}
.page, .navbar, .container, .modal-overlay {
  position: relative;
  z-index: 1;
}
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #55574a; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.navbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.navbar::after {
  content: "";
  display: block;
  height: 3px;
  background: var(--stripe-gold);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.nav-title {
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
}
.nav-links { display: flex; gap: 4px; flex-wrap: wrap; }
.nav-link {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  padding: 7px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition);
}
.nav-link:hover {
  background: rgba(197,163,50,0.08);
  color: var(--accent);
  border-color: rgba(197,163,50,0.2);
}
.nav-link.active {
  background: rgba(197,163,50,0.12);
  color: var(--accent);
  border-color: var(--accent);
}

.page { display: none; animation: fadeIn 0.25s ease; }
.page.active { display: block; }
.subpage { display: none; animation: fadeIn 0.2s ease; }
.subpage.active { display: block; }

.subnav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 20px 0;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.subnav-btn {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  padding: 7px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.83rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition);
}
.subnav-btn:hover {
  background: rgba(197,163,50,0.08);
  color: var(--accent);
}
.subnav-btn.active {
  background: var(--accent);
  color: #1a1b17;
  border-color: var(--accent);
  font-weight: 700;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 7px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.83rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition);
  margin-bottom: 18px;
}
.back-btn:hover {
  background: rgba(197,163,50,0.08);
  color: var(--accent);
  border-color: var(--accent);
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  border-radius: 3px 0 0 3px;
}
.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 18px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-title::before {
  content: "✦";
  color: var(--accent);
  font-size: 0.7rem;
}

.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.93rem;
  font-family: inherit;
  transition: all var(--transition);
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(197,163,50,0.12);
}
.form-textarea { resize: vertical; min-height: 80px; }
.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%239e9c8a'%3E%3Cpath d='M1 1l5 6 5-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}
.btn-primary {
  background: var(--accent);
  color: #1a1b17;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 4px 14px rgba(197,163,50,0.25);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero {
  position: relative;
  width: 100%;
  height: 65vh;
  min-height: 420px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin-bottom: 28px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 40px rgba(0,0,0,0.5);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(27,28,25,0.3) 0%,
    rgba(27,28,25,0.55) 40%,
    rgba(27,28,25,0.92) 85%
  );
}
.hero-title {
  position: relative;
  z-index: 1;
  font-size: 3rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 4px;
  text-align: center;
  text-shadow: 0 2px 20px rgba(0,0,0,0.7);
  padding-bottom: 40px;
}

.hero-text {
  text-align: center;
  padding: 60px 20px 0;
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 40px;
}

#page1 {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 110px);
}

.gallery-section {
  margin-top: auto;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 10px 0 30px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
  aspect-ratio: 16 / 10;
}
.gallery-item:hover {
  border-color: var(--accent);
  transform: scale(1.03);
  box-shadow: 0 6px 24px rgba(0,0,0,0.4);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.lecture-list { display: flex; flex-direction: column; gap: 10px; }
.lecture-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.lecture-item:hover {
  border-color: var(--accent);
  background: rgba(197,163,50,0.04);
}
.lecture-title { font-weight: 600; font-size: 0.93rem; }
.lecture-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 6px 14px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.lecture-link:hover {
  background: var(--accent);
  color: #1a1b17;
}

.unit-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}
.unit-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.unit-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-color, var(--accent));
  transition: height var(--transition);
}
.unit-card:hover {
  border-color: var(--card-color, var(--accent));
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.4);
}
.unit-card:hover::after { height: 5px; }
.unit-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.unit-card-dot {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  flex-shrink: 0;
  background: var(--card-color, var(--accent));
}
.unit-card-name { font-weight: 700; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.5px; }
.unit-card-abbr { font-size: 0.78rem; color: var(--text-muted); font-weight: 600; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
  backdrop-filter: blur(4px);
}
.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  max-width: 540px;
  width: 92%;
  max-height: 80vh;
  overflow-y: auto;
  animation: slideUp 0.25s ease;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
}
.modal-close {
  float: right;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition);
}
.modal-close:hover { color: var(--danger); }

.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--success);
  color: #fff;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 2000;
  animation: slideIn 0.3s ease;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}
.toast.error { background: var(--danger); }

.promotion-info {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.promotion-info p {
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.promotion-info a {
  color: var(--accent);
  font-weight: 600;
}

.command-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.command-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
}
.command-card-rank {
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.78rem;
  margin-bottom: 6px;
}
.command-card-name { font-size: 1rem; font-weight: 600; }

.order-item {
  padding: 14px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  cursor: pointer;
  transition: all var(--transition);
}
.order-item:hover {
  border-color: var(--accent);
  background: rgba(197,163,50,0.05);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(24px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes slideIn { from { transform: translateX(80px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

@media (max-width: 768px) {
  .hero { height: 35vh; min-height: 240px; }
  .hero-title { font-size: 1.5rem; letter-spacing: 2px; padding-bottom: 24px; }
  .nav-links { width: 100%; }
  .nav-link { flex: 1; text-align: center; font-size: 0.72rem; padding: 7px 6px; letter-spacing: 0; }
  .unit-cards { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .card { padding: 18px; }
  .btn { padding: 10px 18px; font-size: 0.8rem; }
  .subnav-btn { font-size: 0.7rem; padding: 6px 10px; }
  .nav-title { font-size: 0.95rem; letter-spacing: 1px; }
  .card-title { font-size: 1rem; }
}
/* === СВЕТЛАЯ ТЕМА === */
[data-theme="light"] {
  --bg-primary: #e8e6dc;
  --bg-secondary: #dfdccb;
  --bg-card: #f2f1ea;
  --bg-input: #fafaf6;
  --border: #c5c2ad;
  --text-primary: #1b1c19;
  --text-secondary: #5a5846;
  --text-muted: #8a886e;
  --accent: #9a7d20;
  --accent-hover: #b8962a;
}
[data-theme="light"] .navbar { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
[data-theme="light"] .nav-link.active { background: rgba(154,125,32,0.1); }
[data-theme="light"] .subnav-btn.active { color: #fafaf5; }
[data-theme="light"] .btn-primary { color: #fafaf5; }
[data-theme="light"] .btn-primary:hover { color: #fafaf5; }
[data-theme="light"] .lecture-link:hover { color: #fafaf5; }
[data-theme="light"] .hero::after {
  background: linear-gradient(180deg, rgba(232,230,220,0.3) 0%, rgba(232,230,220,0.55) 40%, rgba(232,230,220,0.92) 85%);
}
[data-theme="light"] .hero-title { text-shadow: 0 2px 20px rgba(0,0,0,0.25); }
[data-theme="light"] .card { box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
[data-theme="light"] .toast { color: #fff; }
[data-theme="light"] ::-webkit-scrollbar-track { background: var(--bg-primary); }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: #c5c2ad; border-radius: 4px; }
[data-theme="light"] ::-webkit-scrollbar-thumb:hover { background: #b0ad9a; }
[data-theme="light"] .modal-overlay { background: rgba(0,0,0,0.35); }
[data-theme="light"] .form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='%235a5846'%3E%3Cpath d='M1 1l5 6 5-6'/%3E%3C/svg%3E");
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 6px 10px;
  transition: all var(--transition);
  line-height: 1;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(197,163,50,0.08);
}