/*
  Unified site CSS (public pages)
  - Uses Bootstrap 5 for layout & base components
  - This file contains the site's custom theme + a few small helpers
*/

:root {
  --sl-text: #0f172a;
  --sl-muted: #64748b;
  --sl-bg: #f8fafc;
  --sl-card: #ffffff;
  --sl-border: rgba(15, 23, 42, 0.12);
  --sl-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  --sl-radius: 18px;
}

html,
body {
  height: 100%;
}

body {
  background: var(--sl-bg);
  color: var(--sl-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji",
    "Segoe UI Emoji";
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

/* -------------------------
   Hero banner
-------------------------- */

.hero-banner {
  background: url("/img/baner_sonla130_960_glow.webp") center/cover no-repeat;
  min-height: 240px;
  position: relative;
  display: flex;
  align-items: stretch;
}

.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(2, 6, 23, 0.78), rgba(2, 6, 23, 0.25));
}

.hero-overlay {
  position: relative;
  z-index: 1;
  width: 100%;
  color: #fff;
  display: flex;
  align-items: center;
}

.hero-title {
  font-weight: 800;
  letter-spacing: 0.2px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

.hero-subtitle {
  font-size: 1.05rem;
  opacity: 0.95;
}

.hero-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.hero-actions .btn {
  border-radius: 999px;
  font-weight: 700;
  padding: 0.55rem 1rem;
}

@media (max-width: 575.98px) {
  .hero-banner {
    min-height: 200px;
  }
  .hero-subtitle {
    font-size: 0.95rem;
  }
}

/* -------------------------
   Page helpers
-------------------------- */

.page-wrap {
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.section-title {
  font-weight: 800;
}

/* -------------------------
   Countdown block
-------------------------- */

.countdown-card {
  background: var(--sl-card);
  border: 1px solid var(--sl-border);
  border-radius: var(--sl-radius);
  box-shadow: var(--sl-shadow);
}

.countdown-label {
  color: var(--sl-muted);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.countdown-deadline {
  font-weight: 800;
  font-size: clamp(1rem, 2.4vw, 1.4rem);
}

.countdown-text {
  font-weight: 900;
  font-size: clamp(1.05rem, 3vw, 1.75rem);
}

/* -------------------------
   Navigation cards (home)
-------------------------- */

.nav-card {
  display: block;
  border-radius: var(--sl-radius);
  overflow: hidden;
  background: var(--sl-card);
  border: 1px solid var(--sl-border);
  box-shadow: var(--sl-shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.nav-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
}

.nav-card img {
  width: 100%;
  height: auto;
  display: block;
}

/* -------------------------
   Footer
-------------------------- */

.site-footer {
  background: var(--sl-card);
  border-top: 1px solid var(--sl-border);
}

/* -------------------------
   Small visual tweaks
-------------------------- */

.img-thumbnail {
  border-radius: 12px;
}

.table thead th {
  white-space: nowrap;
}

.form-required::after {
  content: " *";
  color: #dc3545;
}

/* Upload bộ ảnh thumbnails */
.boanh-thumb {
  max-height: 200px;
  object-fit: cover;
  cursor: pointer;
}

/* Legacy container for older pages still using #Main */
#Main {
  padding: 1.25rem 0;
}