/* ==============================
   Сброс и базовые стили
   ============================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #0d0d0d;
  --color-surface: #1a1a1a;
  --color-surface-2: #222;
  --color-border: #333;
  --color-text: #e8e8e8;
  --color-text-muted: #888;
  --color-accent: #e63946;
  --color-visited: #4caf50;
  --color-not-visited: #666;
  --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.2s;
}
a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==============================
   Шапка
   ============================== */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}
.site-title:hover {
  opacity: 1;
  text-decoration: none;
}

.metro-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background-color: var(--color-accent);
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 0.2s;
}
.site-nav a:hover {
  color: var(--color-text);
  text-decoration: none;
  opacity: 1;
}

/* ==============================
   Основной контент
   ============================== */
.main-content {
  flex: 1;
  padding: 2.5rem 0;
}

/* ==============================
   Подвал
   ============================== */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1.25rem 0;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  text-align: center;
}

/* ==============================
   Главная страница — статистика
   ============================== */
.hero {
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.hero p {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.stats-bar {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.75rem;
  text-align: center;
  min-width: 130px;
}

.stat-card .number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.stat-card .label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.progress-bar-wrap {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  height: 10px;
  margin-bottom: 2.5rem;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), #ff6b6b);
  border-radius: 999px;
  transition: width 0.5s ease;
}

/* ==============================
   Фильтры
   ============================== */
.filters {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
  align-items: center;
}

.filters label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.filter-btn {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-accent);
  color: var(--color-text);
  background: rgba(230, 57, 70, 0.12);
}

/* ==============================
   Сетка карточек станций
   ============================== */
.stations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.station-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.station-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.station-card.visited {
  border-left: 4px solid var(--color-visited);
}

.station-card.not-visited {
  border-left: 4px solid var(--color-not-visited);
  opacity: 0.7;
}

.card-thumb {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: var(--color-surface-2);
}

.card-thumb-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--color-border);
}

.card-body {
  padding: 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.card-line {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.line-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}
.card-title:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.card-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: auto;
}

.card-status {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  display: inline-block;
  align-self: flex-start;
}

.card-status.visited {
  background: rgba(76, 175, 80, 0.15);
  color: var(--color-visited);
  border: 1px solid rgba(76, 175, 80, 0.3);
}

.card-status.not-visited {
  background: rgba(102, 102, 102, 0.15);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* ==============================
   Страница станции
   ============================== */
.station-page {
  max-width: 860px;
  margin: 0 auto;
}

.station-header {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.station-meta-top {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.line-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.visited-badge {
  font-size: 0.8rem;
  color: var(--color-visited);
  background: rgba(76, 175, 80, 0.15);
  border: 1px solid rgba(76, 175, 80, 0.3);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.not-visited-badge {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: rgba(102, 102, 102, 0.1);
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.station-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.visited-date {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.cover-photo {
  margin-top: 1rem;
  border-radius: calc(var(--radius) - 2px);
  overflow: hidden;
}

.cover-photo img {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  background: var(--color-surface-2);
}

/* Тело страницы станции */
.station-body {
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.station-body h2 {
  font-size: 1.4rem;
  margin: 2rem 0 0.75rem;
  color: var(--color-text);
}

.station-body h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--color-text);
}

.station-body p {
  margin-bottom: 1rem;
}

.station-body ul, .station-body ol {
  margin: 0.75rem 0 1rem 1.5rem;
}

/* ==============================
   Галерея
   ============================== */
.station-gallery {
  margin-bottom: 2.5rem;
}

.station-gallery h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
}

.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: var(--color-surface-2);
  transition: transform 0.3s;
}

.gallery-item:hover img {
  transform: scale(1.04);
}

.gallery-item figcaption {
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ==============================
   Подвал страницы станции
   ============================== */
.station-footer {
  display: flex;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.back-link, .line-link {
  font-size: 0.9rem;
}

/* ==============================
   Лейаут страницы «По линиям» (основа + боковая панель)
   ============================== */
.lines-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-areas: "sidebar main";
  gap: 2rem;
  align-items: start;
}

/* Правая боковая панель */
.lines-layout--right {
  grid-template-columns: 1fr 240px;
  grid-template-areas: "main sidebar";
}

.lines-toc {
  grid-area: sidebar;
  position: sticky;
  top: calc(1rem + 60px); /* учитываем высоту sticky-шапки */
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

.lines-toc-inner {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
}

.lines-toc-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.lines-toc-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-line-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  transition: background 0.15s, color 0.15s;
}

.toc-line-item:hover {
  background: rgba(255,255,255,0.05);
  color: var(--color-text);
  text-decoration: none;
  opacity: 1;
}

.toc-line-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.toc-line-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toc-line-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.lines-main {
  grid-area: main;
  min-width: 0;
}

@media (max-width: 860px) {
  .lines-layout,
  .lines-layout--right {
    grid-template-columns: 1fr;
    grid-template-areas:
      "sidebar"
      "main";
  }

  .lines-toc {
    position: static;
    max-height: none;
  }
}

/* ==============================
   Панель фильтра на странице линий
   ============================== */
.lines-filter-bar {
  margin-bottom: 1.75rem;
}

.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  user-select: none;
}

.toggle-label:hover {
  color: var(--color-text);
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background-color: var(--color-border);
  border-radius: 999px;
  transition: background-color 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 3px;
  top: 3px;
  background-color: #fff;
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--color-accent);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(18px);
}

/* ==============================
   Секция по линиям
   ============================== */
.line-section {
  margin-bottom: 2.5rem;
  /* Компенсация высоты sticky-шапки (~64px) + небольшой отступ */
  scroll-margin-top: 80px;
}

.line-section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.line-color-bar {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ==============================
   Адаптивность
   ============================== */
@media (max-width: 600px) {
  .hero h1 { font-size: 1.5rem; }
  .stations-grid { grid-template-columns: 1fr; }
  .stat-card .number { font-size: 2rem; }
  .site-nav { gap: 1rem; }
  .station-title { font-size: 1.5rem; }
}