:root {
  --bg: #070c17;
  --bg-alt: #0b1120;
  --bg-card: #131c31;
  --border: #22304a;
  --text: #e6ebf5;
  --text-dim: #bcc6de;
  --accent: #d62828;
  --accent-soft: rgba(214, 40, 40, 0.16);
  --accent-dim: #7a1a1a;
  --gold: #e8b923;
  --gold-soft: rgba(232, 185, 35, 0.15);
  --on-accent: #fff6f0;
  --danger: #ff6b6b;
  --header-bg: rgba(7, 12, 23, 0.85);
  --hero-glow: #0f1a30;
  --radius: 10px;
  --max-width: 960px;
  --header-brand-h: 112px;
  --header-h: 56px;
}
/* Nen sang: trang anh vang, tinh than "co do sao vang" */
:root[data-theme="light"] {
  --bg: #fdf8ec;
  --bg-alt: #f7ecd2;
  --bg-card: #fffdf7;
  --border: #e6d6a8;
  --text: #241a10;
  --text-dim: #54462d;
  --accent: #d62828;
  --accent-soft: rgba(214, 40, 40, 0.10);
  --accent-dim: #b32626;
  --gold: #9c6f0b;
  --gold-soft: rgba(184, 134, 11, 0.14);
  --on-accent: #fff8f0;
  --danger: #c62828;
  --header-bg: rgba(253, 248, 236, 0.88);
  --hero-glow: #ffe9ae;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 112.5%; }

section[id] {
  scroll-margin-top: calc(var(--header-brand-h) + var(--header-h) + 12px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  transition: background-color 0.25s ease, color 0.25s ease;
}

body, .site-header, .hero, .banner, .corner-stat, .stat-tile, .badge-icon, .partner-badges,
.timeline-section, .activity-section, .activity-card, .site-footer,
.admin-links, .activity-modal-box, .activity-modal-close {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

a { color: inherit; }

/* ---------- Hieu ung tuong tac chung (hover chuot / cham tay) ---------- */
/* Bo sung dong loat cho cac khoi/nut chinh tren toan site cam giac "co the
   bam duoc": hover (chuot) nhun nhe len, cham/bam (:active, ca chuot lan
   cam ung) nhun nhe xuong. Chi THEM trang thai con thieu, khong ghi de cac
   hieu ung hover rieng da co (vd .activity-card:hover dich len 2px). */
@media (prefers-reduced-motion: no-preference) {
  .stat-tile,
  .corner-stat,
  .activity-card,
  .skill-card,
  .banner-dot,
  .theme-toggle,
  .admin-toggle,
  .hero-cta,
  .corner-fab,
  .event-summary,
  .nav a,
  .site-nav a {
    transition: transform 0.15s ease, border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
  }

  .stat-tile:hover,
  .corner-stat:hover {
    transform: translateY(-2px);
  }

  .stat-tile:active,
  .corner-stat:active,
  .activity-card:active,
  .skill-card:active,
  .banner-dot:active,
  .theme-toggle:active,
  .admin-toggle:active,
  .hero-cta:active,
  .corner-fab:active,
  .event-summary:active,
  .site-nav a:active {
    transform: scale(0.96);
  }
}

/* ---------- Thoi tiet, thoi gian va bai moi cua website ---------- */

.news-ticker {
  position: relative;
  z-index: 3;
  overflow: hidden;
  padding: 8px 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.news-ticker-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 0 20px;
}

.ticker-meta {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: 12px;
  padding-right: 12px;
  border-right: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.75rem;
  white-space: nowrap;
}

.ticker-weather {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: inherit;
  text-decoration: none;
}

.ticker-weather:hover,
.ticker-weather:focus-visible {
  color: var(--text);
  text-decoration: underline;
}

.ticker-weather-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.news-ticker-label {
  flex-shrink: 0;
  padding: 3px 10px;
  background: var(--accent-soft);
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.5;
  text-transform: uppercase;
  white-space: nowrap;
}

.news-ticker-viewport {
  position: relative;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 16px), transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 16px), transparent);
}

.news-ticker-track {
  display: flex;
  align-items: center;
  gap: 42px;
  width: max-content;
  white-space: nowrap;
  animation: news-ticker-scroll var(--ticker-duration, 80s) linear infinite;
}

.news-ticker:hover .news-ticker-track,
.news-ticker-track:focus-within {
  animation-play-state: paused;
}

.news-ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
}

.news-ticker-item:hover,
.news-ticker-item:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.news-ticker-date {
  flex-shrink: 0;
  padding: 1px 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: 0.67rem;
  font-weight: 600;
}

.news-ticker-loading {
  color: var(--text-dim);
  font-size: 0.8rem;
}

@keyframes news-ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-50% - 21px)); }
}

@media (prefers-reduced-motion: reduce) {
  .news-ticker-track { animation: none; }
  .news-ticker-viewport { overflow-x: auto; }
}

@media (max-width: 780px) {
  .news-ticker { padding: 7px 0 8px; }

  .news-ticker-inner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 6px 9px;
    padding: 0 12px;
  }

  .ticker-meta {
    grid-column: 1 / -1;
    justify-content: space-between;
    gap: 8px;
    padding: 0 0 5px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.69rem;
  }

  .news-ticker-label { padding: 2px 7px; }
  .news-ticker-track { gap: 28px; }
  .news-ticker-item { font-size: 0.76rem; }

  @keyframes news-ticker-scroll {
    from { transform: translateX(0); }
    to { transform: translateX(calc(-50% - 14px)); }
  }
}