/* ================================================================
   「心中之城」活动官网 — 全局样式
   设计调性：深色底蕴 + 金色点缀 + 中国文化气韵
   参考：良渚遗址公园官网、三星堆官网
   ================================================================ */

/* ==================== CSS 变量 ==================== */
:root {
  /* 主色调 */
  --color-bg: #0f0f1a;
  --color-bg-elevated: #1a1a2e;
  --color-bg-card: #16213e;
  --color-bg-input: #1e1e36;

  /* 金色系 */
  --color-gold: #c9a84c;
  --color-gold-light: #d4b86a;
  --color-gold-dark: #a88a3d;
  --color-gold-dim: #7a6530;

  /* 文字色 */
  --color-text: #e8e6e3;
  --color-text-secondary: #a8a6a3;
  --color-text-muted: #6b6a67;

  /* 功能色 */
  --color-primary: #c9a84c;
  --color-success: #4caf50;
  --color-warning: #ff9800;
  --color-danger: #f44336;
  --color-info: #2196f3;

  /* 边框 / 分割线 */
  --border-color: #2a2a3e;
  --border-light: #3a3a4e;

  /* 圆角 */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-gold: 0 0 20px rgba(201,168,76,0.15);

  /* 过渡 */
  --transition: 0.25s ease;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --font-display: "Noto Serif SC", "STZhongsong", "SimSun", serif;

  /* 布局 */
  --max-width: 1200px;
  --header-height: 64px;
  --content-padding: 24px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* ==================== Typography ==================== */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.4; }
h1 { font-size: 2.5rem; letter-spacing: 0.04em; }
h2 { font-size: 1.8rem; letter-spacing: 0.03em; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }

p { margin-bottom: 0.8em; }

a {
  color: var(--color-gold-light);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-gold); }

.text-gold { color: var(--color-gold); }
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }

/* ==================== Layout ==================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

.page-header {
  text-align: center;
  padding: 80px 0 48px;
}

.page-header h1 {
  color: var(--color-gold);
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.page-header p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  color: var(--color-gold);
  margin-bottom: 8px;
}

.section-title p {
  color: var(--color-text-secondary);
}

/* ==================== Header / Nav ==================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(15,15,26,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition);
}

.site-header.scrolled {
  background: rgba(15,15,26,0.95);
  border-bottom-color: var(--border-light);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gold);
  text-decoration: none;
}

.logo-icon {
  font-size: 1.6rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-gold);
  border-bottom-color: var(--color-gold);
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 999;
  padding: 24px;
  flex-direction: column;
  gap: 8px;
}

.mobile-nav.open { display: flex; }

.mobile-nav a {
  display: block;
  padding: 16px 20px;
  color: var(--color-text);
  font-size: 1.1rem;
  text-decoration: none;
  border-radius: var(--radius);
  background: var(--color-bg-elevated);
  transition: all var(--transition);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--color-gold);
  background: var(--color-bg-card);
}

/* ==================== Buttons ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
  color: #1a1a1a;
  box-shadow: var(--shadow-gold);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 24px rgba(201,168,76,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-gold);
  border: 1.5px solid var(--color-gold);
}
.btn-outline:hover:not(:disabled) {
  background: rgba(201,168,76,0.1);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover:not(:disabled) {
  color: var(--color-text);
  background: rgba(255,255,255,0.05);
}

.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }

.btn-block { width: 100%; }

/* ==================== Cards ==================== */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}
.card:hover {
  border-color: var(--color-gold-dim);
  box-shadow: var(--shadow-gold);
  transform: translateY(-2px);
}

/* ==================== Forms ==================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: border-color var(--transition);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(201,168,76,0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a8a6a3' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-danger);
  margin-top: 4px;
  display: none;
}

.form-group.error .form-input,
.form-group.error .form-textarea {
  border-color: var(--color-danger);
}
.form-group.error .form-error { display: block; }

/* ==================== Auth Pages ==================== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(201,168,76,0.08) 0%, transparent 60%),
    var(--color-bg);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
}

.auth-card .auth-logo {
  text-align: center;
  margin-bottom: 32px;
}

.auth-card .auth-logo .logo-icon {
  font-size: 2.5rem;
}

.auth-card .auth-logo h2 {
  font-size: 1.5rem;
  color: var(--color-gold);
  margin-top: 8px;
}

.auth-card .auth-logo p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.auth-alt {
  text-align: center;
  margin-top: 24px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.auth-alt a {
  color: var(--color-gold-light);
  font-weight: 600;
}

/* ==================== Badge / Tag ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
}

.badge-gold {
  background: rgba(201,168,76,0.15);
  color: var(--color-gold-light);
  border: 1px solid rgba(201,168,76,0.3);
}

.badge-success {
  background: rgba(76,175,80,0.15);
  color: #66bb6a;
  border: 1px solid rgba(76,175,80,0.3);
}

.badge-pending {
  background: rgba(255,152,0,0.15);
  color: #ffa726;
  border: 1px solid rgba(255,152,0,0.3);
}

/* ==================== Toast ==================== */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-120px);
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 9999;
  pointer-events: none;
  transition: transform 0.35s cubic-bezier(0.18, 0.89, 0.32, 1.28);
  box-shadow: var(--shadow-lg);
}

.toast-show {
  transform: translateX(-50%) translateY(0);
}

.toast-info { background: var(--color-bg-card); border: 1px solid var(--border-light); color: var(--color-text); }
.toast-success { background: #1b3a1b; border: 1px solid var(--color-success); color: #a5d6a7; }
.toast-warning { background: #3a2e1b; border: 1px solid var(--color-warning); color: #ffe0b2; }
.toast-error { background: #3a1b1b; border: 1px solid var(--color-danger); color: #ef9a9a; }

/* ==================== Loading / Empty / Error states ==================== */
.loading-spinner,
.empty-state,
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  color: var(--color-text-muted);
  text-align: center;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.empty-icon,
.error-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* ==================== Footer ==================== */
.site-footer {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand h3 {
  color: var(--color-gold);
  margin-bottom: 8px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer-links h4 {
  color: var(--color-text);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.footer-links a {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* ==================== Filter Bar ==================== */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-bar .form-select {
  width: auto;
  min-width: 140px;
}

.filter-bar .search-input {
  flex: 1;
  min-width: 200px;
}

/* ==================== Work Grid ==================== */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.work-card {
  background: var(--color-bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.work-card:hover {
  border-color: var(--color-gold-dim);
  box-shadow: var(--shadow-gold);
  transform: translateY(-3px);
}

.work-card-cover {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-bg-elevated);
}

.work-card-body {
  padding: 20px;
}

.work-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.work-card-body p {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.work-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.work-card-stats {
  display: flex;
  gap: 12px;
}

.work-card-stats span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==================== Vote Button ==================== */
.btn-vote {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: transparent;
  border: 1.5px solid var(--color-gold);
  color: var(--color-gold);
  border-radius: 100px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-vote:hover:not(:disabled) {
  background: var(--color-gold);
  color: #1a1a1a;
}

.btn-vote.voted {
  background: var(--color-gold);
  color: #1a1a1a;
  border-color: var(--color-gold);
}

.btn-vote .vote-count {
  font-weight: 700;
}

/* ==================== Modal ==================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.modal-header h3 {
  color: var(--color-gold);
}

.modal-close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.modal-close:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.05);
}

/* ==================== Pagination ==================== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}

.pagination button {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-color);
  background: var(--color-bg-card);
  color: var(--color-text);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.pagination button:hover:not(:disabled) {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.pagination button.active {
  background: var(--color-gold);
  color: #1a1a1a;
  border-color: var(--color-gold);
}

.pagination button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ==================== Tabs ==================== */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--color-bg-elevated);
  padding: 4px;
  border-radius: var(--radius);
  margin-bottom: 32px;
  overflow-x: auto;
}

.tab-btn {
  padding: 10px 24px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--color-text);
}

.tab-btn.active {
  background: var(--color-bg-card);
  color: var(--color-gold);
}

/* ==================== Upload Area ==================== */
.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--color-bg-input);
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--color-gold);
  background: rgba(201,168,76,0.05);
}

.upload-area .upload-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.upload-area p {
  color: var(--color-text-secondary);
  margin: 0;
}

.upload-area .upload-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

.upload-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.upload-preview-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.upload-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.upload-preview-item .remove-btn {
  position: absolute;
  top: 2px;
  right: 2px;
  background: rgba(0,0,0,0.7);
  color: white;
  border: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 0.7rem;
  cursor: pointer;
}

/* ==================== Admin ==================== */
.admin-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - var(--header-height));
  margin-top: var(--header-height);
}

.admin-sidebar {
  background: var(--color-bg-elevated);
  border-right: 1px solid var(--border-color);
  padding: 24px;
}

.admin-sidebar h3 {
  color: var(--color-gold);
  margin-bottom: 24px;
  font-size: 1rem;
}

.admin-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius);
  margin-bottom: 4px;
  font-size: 0.9rem;
  transition: all var(--transition);
}

.admin-nav a:hover,
.admin-nav a.active {
  color: var(--color-gold);
  background: rgba(201,168,76,0.08);
}

.admin-content {
  padding: 32px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.admin-table th {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.admin-table tr:hover td {
  background: rgba(255,255,255,0.02);
}

/* ==================== Countdown ==================== */
.countdown-bar {
  background: linear-gradient(135deg, rgba(201,168,76,0.1), rgba(201,168,76,0.05));
  border: 1px solid rgba(201,168,76,0.2);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.countdown-item {
  text-align: center;
}

.countdown-item .number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

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

/* ==================== Track Cards ==================== */
.track-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.track-card {
  background: var(--color-bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

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

.track-card .track-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.track-card h3 {
  color: var(--color-gold);
  margin-bottom: 8px;
}

.track-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ==================== Detail Page ==================== */
.detail-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 24px 40px;
}

.detail-header {
  margin-bottom: 32px;
}

.detail-header h1 {
  color: var(--color-gold);
  margin-bottom: 12px;
}

.detail-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
}

.detail-cover {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}

.detail-content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text);
}

.detail-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.15rem; }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .section { padding: 48px 0; }

  .track-cards {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .work-grid {
    grid-template-columns: 1fr;
  }

  .countdown-bar { gap: 16px; padding: 16px; }
  .countdown-item .number { font-size: 1.8rem; }

  .admin-layout {
    grid-template-columns: 1fr;
  }
  .admin-sidebar { display: none; }

  .auth-card { padding: 28px 20px; }

  .filter-bar { flex-direction: column; }
  .filter-bar .form-select { width: 100%; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .track-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}