/*
Theme Name: HYUTE Student Club Official
Theme URI: https://roboticshyute.xyz
Author: HYUTE Faculty of Electrical & Electronic Engineering
Author URI: https://roboticshyute.xyz
Description: Giao diện Cổng thông tin CLB Robotics HYUTE đồng bộ theo ngôn ngữ thiết kế Cổng Sự Kiện HYUTE (doanhoi.hyute.edu.vn).
Version: 4.0.0
Text Domain: hyute-club
*/

:root {
  --brand: #1e40af;
  --brand-dark: #1e3a8a;
  --brand-light: #eff6ff;
  --accent: #dc2626;
  --accent-hover: #b91c1c;

  --color-primary: #1e3a8a;
  --color-primary-dark: #172554;
  --color-secondary: #1e40af;
  --color-secondary-light: #eff6ff;
  --color-accent: #dc2626;
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafb;
  --color-surface: #f3f4f6;
  --color-border: #e5e7eb;
  --color-border-strong: #d1d5db;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-text-light: #9ca3af;
  --color-success: #15803d;
  --color-success-bg: #dcfce7;
  --color-warning: #b45309;
  --color-warning-bg: #fef3c7;
  --color-error: #b91c1c;
  --color-error-bg: #fee2e2;
  --color-info: #1d4ed8;
  --color-info-bg: #dbeafe;

  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: #f8fafc;
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--brand-dark);
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  z-index: 9999;
}
.skip-link:focus {
  top: 12px;
}

/* ==========================================================================
   1. CONTAINER & SECTION SYSTEM (MATCHING DOANHOI.HYUTE.EDU.VN)
   ========================================================================== */
.container,
.container-page,
.clb-container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}
.container--narrow {
  max-width: 860px;
}

.section,
.clb-section {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}
.section--white {
  background-color: #ffffff;
  border-top: 1px solid #f3f4f6;
  border-bottom: 1px solid #f3f4f6;
}
.section--alt {
  background-color: #f8fafc;
}

/* Signature Section Title with Red Pill Bar on the Left */
.section-header {
  margin-bottom: 1.25rem;
}
.section-header--flex {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-bottom: 1.25rem;
}
.section-eyebrow {
  display: none; /* Hidden to match clean doanhoi.hyute.edu.vn headers */
}
.section-title {
  text-transform: uppercase;
  letter-spacing: 0.025em;
  color: var(--brand-dark);
  padding-left: 1rem;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.85rem;
  position: relative;
  margin-bottom: 0;
}
@media (min-width: 768px) {
  .section-title {
    font-size: 1.5rem;
    line-height: 2rem;
  }
}
.section-title::before {
  content: "";
  background-color: var(--accent);
  border-radius: 9999px;
  width: 0.375rem;
  position: absolute;
  top: 0.2rem;
  bottom: 0.2rem;
  left: 0;
}
.section-title.text-center {
  display: inline-block;
  text-align: center;
}
.section-desc {
  margin-top: 0.35rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}
.section-more-link {
  flex-shrink: 0;
  white-space: nowrap;
  color: var(--brand);
  font-size: 0.875rem;
  font-weight: 600;
}
.section-more-link:hover {
  color: var(--accent);
}

/* Grid System */
.grid-2, .clb-grid-2 {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.25rem;
}
.grid-3, .clb-grid-3 {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.25rem;
}
.grid-4, .clb-grid-4 {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.25rem;
}
@media (min-width: 640px) {
  .grid-2, .clb-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3, .clb-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-4, .clb-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid-3, .clb-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-4, .clb-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ==========================================================================
   2. STICKY HEADER (MATCHING DOANHOI.HYUTE.EDU.VN)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.site-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}
.brand-logos-trio {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.brand-logo-circle {
  width: 42px;
  height: 42px;
  border-radius: 9999px;
  object-fit: contain;
  background: #fff;
  box-shadow: 0 0 0 2px rgba(30, 64, 175, 0.12);
  padding: 1px;
}
.brand-logo-circle--clb {
  border-radius: 10px;
}
.site-brand__text {
  line-height: 1.25;
}
.site-brand__title {
  font-weight: 700;
  color: var(--brand-dark);
  font-size: 0.92rem;
  display: block;
}
@media (min-width: 1280px) {
  .site-brand__title { font-size: 1rem; }
}
.site-brand__sub {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  display: block;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.15rem;
}
.nav-list li a {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.65rem;
  border-radius: 0.375rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: #374151;
  white-space: nowrap;
}
.nav-list li a::after {
  content: "";
  position: absolute;
  left: 0.65rem;
  right: 0.65rem;
  bottom: 0.25rem;
  height: 2px;
  border-radius: 9999px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}
.nav-list li a:hover,
.nav-list li.current-menu-item > a {
  color: var(--brand);
}
.nav-list li a:hover::after,
.nav-list li.current-menu-item > a::after {
  transform: scaleX(1);
}

.header-cta {
  margin-left: 0.35rem;
}

.mobile-menu-toggle {
  display: none;
  height: 2.5rem;
  width: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  border: 1px solid #e5e7eb;
  background: #fff;
  color: #374151;
  cursor: pointer;
}
@media (max-width: 1120px) {
  .mobile-menu-toggle { display: inline-flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    padding: 1rem;
    flex-direction: column;
    align-items: stretch;
  }
  .main-nav.is-open { display: flex; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
  }
  .nav-list li a {
    display: block;
    padding: 0.65rem 0.75rem;
  }
  .header-cta {
    margin-left: 0;
    margin-top: 0.75rem;
  }
  .header-cta .btn { width: 100%; }
}

/* ==========================================================================
   3. BUTTONS, BADGES & CARDS (MATCHING DOANHOI.HYUTE.EDU.VN)
   ========================================================================== */
.btn, .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  line-height: 1.25rem;
}
.btn--primary, .btn--accent, .btn-primary {
  background-color: var(--accent);
  color: #ffffff !important;
  box-shadow: 0 1px 2px 0 rgba(220, 38, 38, 0.2);
}
.btn--primary:hover, .btn--accent:hover, .btn-primary:hover {
  background-color: var(--accent-hover);
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 6px -1px rgba(220, 38, 38, 0.3);
}
.btn--secondary, .btn--outline-light {
  border: 1px solid #bfdbfe;
  background-color: rgba(255, 255, 255, 0.85);
  color: var(--brand-dark) !important;
}
.btn--secondary:hover, .btn--outline-light:hover {
  background-color: #dbeafe;
  color: var(--brand-dark) !important;
}
.btn--brand {
  background-color: var(--brand);
  color: #ffffff !important;
}
.btn--brand:hover {
  background-color: var(--brand-dark);
  color: #ffffff !important;
  transform: translateY(-2px);
}
.btn--sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
}

.badge {
  display: inline-block;
  border-radius: 9999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1rem;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.badge--accent {
  background-color: var(--accent);
  color: #ffffff;
}
.badge--primary, .badge--info {
  background-color: #dbeafe;
  color: #1e40af;
}
.badge--success {
  background-color: #dcfce7;
  color: #15803d;
}
.badge--warning {
  background-color: #fef3c7;
  color: #b45309;
}
.badge--neutral {
  background-color: #f3f4f6;
  color: #4b5563;
}

.card, .clb-card {
  background-color: #ffffff;
  border: 1px solid #f3f4f6;
  border-radius: 1rem;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.card:hover, .clb-card:hover {
  transform: translateY(-0.25rem);
  border-color: #e5e7eb;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}
.card__thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  background-color: #eff6ff;
  overflow: hidden;
}
.card__thumb--5x3 {
  aspect-ratio: 5 / 3;
}
.card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.card:hover .card__thumb img {
  transform: scale(1.05);
}
.card__thumb-badge-left {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 2;
}
.card__thumb-badge-right {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 2;
}
.card__body, .clb-card-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}
.card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}
.card__title {
  font-size: 1rem;
  font-weight: 600;
  color: #1f2937;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__title a:hover {
  color: var(--brand);
}
.card__excerpt {
  font-size: 0.875rem;
  color: #6b7280;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}
.card__footer {
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px solid #f3f4f6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: #6b7280;
}
.card__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--brand);
}
.card__link--accent {
  color: var(--accent);
}

/* ==========================================================================
   4. HERO CAROUSEL (BLOCK 2 OF DOANHOI.HYUTE.EDU.VN)
   ========================================================================== */
.hyute-carousel-sec {
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.hyute-carousel-box {
  position: relative;
  overflow: hidden;
  border-radius: 1rem;
  border: 1px solid #dbeafe;
  background-color: #ffffff;
  box-shadow: 0 10px 15px -3px rgba(30, 58, 138, 0.06);
}
.hyute-slide {
  display: none;
  grid-template-columns: 1fr;
}
.hyute-slide.is-active {
  display: grid;
}
@media (min-width: 768px) {
  .hyute-slide.is-active {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.hyute-slide__media {
  position: relative;
  overflow: hidden;
  background-color: #eff6ff;
  height: 240px;
}
@media (min-width: 768px) {
  .hyute-slide__media {
    height: 380px;
  }
}
.hyute-slide__bg-blur {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.1);
  filter: blur(20px);
  opacity: 0.4;
}
.hyute-slide__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hyute-slide__content {
  display: flex;
  align-items: center;
  background: linear-gradient(to bottom right, #ffffff, rgba(239, 246, 255, 0.65), #e0f2fe);
  padding: 1.5rem 1.5rem 3.5rem;
  color: #172554;
}
@media (min-width: 768px) {
  .hyute-slide__content {
    padding: 2rem 2.25rem 3.5rem;
  }
}
.hyute-slide__title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.375;
  color: #172554;
  margin-bottom: 0.75rem;
}
@media (min-width: 768px) {
  .hyute-slide__title {
    font-size: 1.55rem;
  }
}
.hyute-slide__desc {
  font-size: 0.9rem;
  color: #334155;
  margin-bottom: 1rem;
  line-height: 1.55;
}
.hyute-carousel-nav-btn {
  position: absolute;
  bottom: 1.1rem;
  height: 2.25rem;
  width: 2.25rem;
  border-radius: 9999px;
  border: 1px solid #dbeafe;
  background: rgba(255, 255, 255, 0.92);
  color: #1e3a8a;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.hyute-carousel-nav-btn:hover {
  background: #dbeafe;
}
.hyute-carousel-dots {
  position: absolute;
  bottom: 1.35rem;
  right: 1.5rem;
  display: flex;
  gap: 0.45rem;
  z-index: 10;
}
.hyute-carousel-dot {
  height: 0.625rem;
  width: 0.625rem;
  border-radius: 9999px;
  border: none;
  background-color: #bfdbfe;
  cursor: pointer;
  transition: all 0.25s ease;
}
.hyute-carousel-dot.is-active {
  width: 1.5rem;
  background-color: #1d4ed8;
}

/* ==========================================================================
   5. WEEKLY SCHEDULE BOARD & STATS STRIP & ORG TREE (DOANHOI STYLE)
   ========================================================================== */
.weekly-board {
  background: #ffffff;
  border: 1px solid #f3f4f6;
  border-radius: 1rem;
  padding: 1rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.weekly-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.4rem;
}
@media (max-width: 900px) {
  .weekly-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 520px) {
  .weekly-grid {
    grid-template-columns: 1fr;
  }
}
.weekly-col {
  background: #f8fafc;
  border-radius: 0.65rem;
  padding: 0.65rem;
  min-height: 110px;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.weekly-col--today {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
}
.weekly-day-hdr {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #6b7280;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid #e5e7eb;
}
.weekly-col--today .weekly-day-hdr {
  color: var(--brand);
}
.weekly-pill {
  display: block;
  background: var(--accent);
  color: #ffffff !important;
  border-radius: 0.5rem;
  padding: 0.45rem 0.6rem;
  font-size: 0.75rem;
  line-height: 1.3;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}
.weekly-pill--blue {
  background: var(--brand);
}
.weekly-pill:hover {
  filter: brightness(0.95);
}

/* Gradient Stats Banner */
.stats-gradient-bar {
  border-radius: 1rem;
  background: linear-gradient(to right, var(--brand-dark), var(--brand), var(--accent));
  padding: 1.5rem;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.15);
}
.stats-gradient-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  text-align: center;
}
@media (min-width: 640px) {
  .stats-gradient-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Dashed Organization Box */
.org-dashed-box {
  border-radius: 1rem;
  border: 2px dashed #bae6fd;
  background-color: rgba(240, 249, 255, 0.5);
  padding: 1.25rem;
}

/* Subpages Page Hero & Forms */
.page-hero {
  background: linear-gradient(to right, var(--brand-dark), var(--brand));
  color: #ffffff;
  padding-top: 2.25rem;
  padding-bottom: 2.25rem;
}
.page-hero__title {
  color: #ffffff;
  font-size: 1.65rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.page-hero__desc {
  color: #dbeafe;
  font-size: 0.95rem;
  max-width: 68ch;
  margin: 0;
}

.breadcrumb-bar {
  background: #ffffff;
  border-bottom: 1px solid #f3f4f6;
  padding: 0.6rem 0;
}
.breadcrumb-nav {
  font-size: 0.8rem;
  color: #6b7280;
  display: flex;
  gap: 0.4rem;
  align-items: center;
}
.breadcrumb-nav a {
  color: var(--brand);
  font-weight: 600;
}

.form-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 1rem;
  padding: 1.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
.form-group { margin-bottom: 1rem; }
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.35rem;
}
.form-label .required { color: var(--accent); }
.form-control, .form-select, .form-textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid #d1d5db;
  border-radius: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}
.form-textarea { min-height: 110px; }
.form-control:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--brand);
  outline: 2px solid rgba(30, 64, 175, 0.15);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.filter-btn {
  padding: 0.4rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  background: #ffffff;
  color: #4b5563;
  border: 1px solid #e5e7eb;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--brand);
  color: #ffffff !important;
  border-color: var(--brand);
}

.member-card {
  text-align: center;
  padding: 1.25rem;
  align-items: center;
}
.member-avatar {
  width: 72px;
  height: 72px;
  border-radius: 9999px;
  margin: 0 auto 0.75rem;
  background: var(--brand-light);
  color: var(--brand-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  overflow: hidden;
  border: 2px solid #dbeafe;
}
.member-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.2rem;
}
.member-role {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand);
  margin-bottom: 0.4rem;
}
.member-spec {
  font-size: 0.78rem;
  color: #6b7280;
  margin: 0;
}

.alert {
  padding: 0.85rem 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}
.alert--success { background: #dcfce7; color: #15803d; }
.alert--warning { background: #fef3c7; color: #b45309; }
.alert--error   { background: #fee2e2; color: #b91c1c; }

.empty-state {
  background: #ffffff;
  border: 1px dashed #cbd5e1;
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
}
.empty-state__title {
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 0.35rem;
}
.empty-state__desc {
  font-size: 0.875rem;
  color: #6b7280;
  margin: 0;
}

.cta-banner {
  border-radius: 1rem;
  background: linear-gradient(to right, var(--brand-dark), var(--brand));
  padding: 2rem;
  color: #ffffff;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.cta-banner h2 { color: #ffffff; font-size: 1.35rem; margin-bottom: 0.35rem; }
.cta-banner p { color: #dbeafe; font-size: 0.9rem; margin: 0; }
.cta-banner__actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ==========================================================================
   6. FOOTER (MATCHING DOANHOI.HYUTE.EDU.VN)
   ========================================================================== */
.site-footer {
  margin-top: 4rem;
  background-color: var(--brand-dark);
  color: #ffffff;
}
.footer-main {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .footer-main {
    grid-template-columns: 1.35fr 1fr;
  }
}
.footer-info-line {
  font-size: 0.875rem;
  color: #dbeafe;
  margin-bottom: 0.25rem;
}
.footer-cat-list {
  list-style: none;
  font-size: 0.875rem;
  color: #dbeafe;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem 1.5rem;
}
.footer-cat-list a:hover {
  color: #ffffff;
  text-decoration: underline;
}
.footer-copy {
  border-top: 1px solid #1e40af;
  padding-top: 1rem;
  padding-bottom: 1rem;
  text-align: center;
  font-size: 0.75rem;
  color: #bfdbfe;
}