/* ============================================
   UIN SULTHAN THAHA SAIFUDDIN JAMBI
   Main Stylesheet
   ============================================ */

/* Design Tokens */
:root {
  --primary:       #1B4F9E;   /* deep royal blue - from logo */
  --primary-dark:  #0F2F6A;
  --primary-light: #2C6CC4;
  --accent:        #00B3BE;   /* teal/cyan - from logo top arc */
  --accent-warm:   #D4A72C;   /* gold - for akreditasi badge feel */
  --text-dark:     #1A1A2E;
  --text-body:     #374151;
  --text-muted:    #6B7280;
  --bg-light:      #F8FAFF;
  --bg-white:      #FFFFFF;
  --border:        #E5E9F2;
  --shadow-sm:     0 2px 8px rgba(27,79,158,0.08);
  --shadow-md:     0 8px 32px rgba(27,79,158,0.12);
  --shadow-lg:     0 20px 60px rgba(27,79,158,0.16);
  --radius:        12px;
  --radius-lg:     20px;
  --transition:    all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::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: 'Plus Jakarta Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', 'Segoe UI', sans-serif;
  color: var(--text-dark);
  line-height: 1.25;
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
p { margin-bottom: 1rem; }

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-wide { max-width: 1400px; }

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header-top {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: white;
  font-size: 0.8rem;
  padding: 6px 0;
}

.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.header-top-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.header-top-links a {
  color: rgba(255,255,255,0.85);
  font-size: 0.78rem;
  transition: var(--transition);
}

.header-top-links a:hover { color: var(--accent); }

.nav-main {
  padding: 14px 0;
}

.nav-main .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.site-logo img {
  height: 52px;
  width: auto;
}

.logo-text .logo-title {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
}

.logo-text .logo-name {
  font-size: 0.95rem;
  color: var(--primary-dark);
  font-weight: 800;
  line-height: 1.2;
  display: block;
}

.logo-text .logo-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}

.nav-links a {
  display: block;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-dark);
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--bg-light);
  color: var(--primary);
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%) !important;
  color: white !important;
  border-radius: 8px !important;
}

.nav-cta:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%) !important;
  color: white !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--accent) 100%);
  color: white;
  padding: 80px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
  color: white;
}

.hero h1 {
  color: white;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}

.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.88);
  margin-bottom: 32px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: white;
  color: var(--primary);
  border-color: white;
}

.btn-primary:hover {
  background: var(--bg-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  color: var(--primary);
}

.btn-secondary {
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,0.6);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  border-color: white;
  color: white;
  transform: translateY(-2px);
}

.btn-blue {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.btn-blue:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: white;
}

.hero-image-wrap {
  position: relative;
}

.hero-image-wrap img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 3px solid rgba(255,255,255,0.2);
}

.hero-stats {
  display: flex;
  gap: 24px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat strong {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: white;
  line-height: 1;
}

.hero-stat span {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.75);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   AKREDITASI BADGE STRIP
   ============================================ */
.akreditasi-strip {
  background: linear-gradient(135deg, var(--accent-warm) 0%, #f0c040 100%);
  padding: 16px 0;
}

.akreditasi-strip .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  text-align: center;
}

.akreditasi-text {
  font-weight: 800;
  color: var(--primary-dark);
  font-size: 1rem;
}

.akreditasi-unggul {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--primary-dark);
  letter-spacing: -0.02em;
}

/* ============================================
   SECTIONS GENERAL
   ============================================ */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 12px;
  position: relative;
  padding: 0 16px;
}

.section-eyebrow::before,
.section-eyebrow::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 28px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.section-eyebrow::before { right: 100%; margin-right: -12px; }
.section-eyebrow::after  { left: 100%; margin-left: -12px; }

.section-title {
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}

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

.card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.card-body {
  padding: 24px;
}

.card-category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.card-title {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.card-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  margin-top: 16px;
  align-items: center;
}

/* ============================================
   GRID LAYOUTS
   ============================================ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

/* ============================================
   STATISTICS BAR
   ============================================ */
.stats-bar {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 48px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item {
  padding: 20px;
  border-right: 1px solid rgba(255,255,255,0.15);
}

.stat-item:last-child { border-right: none; }

.stat-number {
  font-size: 2.75rem;
  font-weight: 900;
  color: white;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.75);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================
   FACULTY CARDS
   ============================================ */
.faculty-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.faculty-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
}

.faculty-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.faculty-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 16px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.faculty-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.35;
  margin-bottom: 8px;
}

.faculty-prodi {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================================
   NEWS SECTION
   ============================================ */
.news-featured {
  grid-column: span 2;
}

.news-featured .card-img {
  height: 300px;
}

.news-featured .card-title {
  font-size: 1.4rem;
}

/* ============================================
   PARTNER LOGOS
   ============================================ */
.partner-section {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.partner-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 40px;
}

.partner-logos img {
  max-height: 60px;
  max-width: 140px;
  object-fit: contain;
  filter: grayscale(40%);
  opacity: 0.8;
  transition: var(--transition);
}

.partner-logos img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb-section {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  font-size: 0.82rem;
}

.breadcrumb li:not(:last-child)::after {
  content: '›';
  margin-left: 8px;
  color: var(--text-muted);
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb li:last-child { color: var(--primary); font-weight: 600; }

/* ============================================
   PAGE HERO (inner pages)
   ============================================ */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 60px 0;
  color: white;
  text-align: center;
}

.page-hero h1 {
  color: white;
  margin-bottom: 12px;
}

.page-hero p {
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto;
}

/* ============================================
   CONTENT ARTICLE
   ============================================ */
.content-article {
  max-width: 820px;
  margin: 0 auto;
}

.content-article h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.content-article h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--primary);
}

.content-article ul,
.content-article ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.content-article li {
  margin-bottom: 0.5rem;
}

.content-article blockquote {
  border-left: 4px solid var(--accent);
  padding: 1rem 1.5rem;
  background: var(--bg-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-body);
}

/* ============================================
   INFO BOXES
   ============================================ */
.info-box {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  border-left: 4px solid var(--primary);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.info-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.info-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  color: white;
}

.info-content strong {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.info-content span {
  font-size: 0.95rem;
  color: var(--text-dark);
  font-weight: 600;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--primary-dark);
  color: white;
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo img { height: 48px; }

.footer-logo-text .name {
  font-size: 0.95rem;
  font-weight: 800;
  color: white;
  display: block;
}

.footer-logo-text .sub {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.6);
  display: block;
}

.footer-desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.75;
  margin-bottom: 24px;
}

.footer-contact-item {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  align-items: flex-start;
}

.footer-contact-item span:first-child {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.footer-col h4 {
  color: white;
  font-size: 0.9rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 28px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links a::before {
  content: '›';
  color: var(--accent);
  font-weight: 700;
}

.footer-links a:hover { color: white; padding-left: 4px; }

.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  margin: 0;
}

.footer-bottom a {
  color: var(--accent);
}

.social-links {
  display: flex;
  gap: 10px;
}

.social-link {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.8);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
}

/* ============================================
   ANNOUNCEMENT TICKER
   ============================================ */
.announcement-bar {
  background: var(--primary);
  color: white;
  padding: 10px 0;
  overflow: hidden;
}

.announcement-inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.announcement-label {
  background: var(--accent);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
  flex-shrink: 0;
}

.announcement-text {
  font-size: 0.82rem;
  white-space: nowrap;
  animation: ticker 30s linear infinite;
}

@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============================================
   TABLE STYLES
   ============================================ */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th {
  background: var(--primary);
  color: white;
  padding: 14px 16px;
  text-align: left;
  font-weight: 700;
  font-size: 0.82rem;
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
}

.data-table tr:nth-child(even) { background: var(--bg-light); }
.data-table tr:hover td { background: #EEF3FB; }

/* ============================================
   BADGE / TAGS
   ============================================ */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
}

.badge-blue {
  background: #DBEAFE;
  color: var(--primary);
}

.badge-teal {
  background: #CCFBF1;
  color: #0F766E;
}

.badge-gold {
  background: #FEF3C7;
  color: #92400E;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 80px 24px 24px;
    gap: 0;
    z-index: 999;
  }

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

  .nav-links a {
    padding: 14px 12px;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    font-size: 1rem;
  }

  .nav-toggle { display: flex; }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-image-wrap { display: none; }

  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .news-featured { grid-column: span 1; }

  .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.15); }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.text-primary { color: var(--primary); }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: 2rem; }
.mt-8 { margin-top: 4rem; }
.fw-bold { font-weight: 700; }

.divider {
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

.highlight-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.highlight-box h2,
.highlight-box h3 {
  color: white;
}

.highlight-box p {
  color: rgba(255,255,255,0.9);
}

/* Sticky back-to-top */
#back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: white;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  cursor: pointer;
  z-index: 500;
  text-decoration: none;
}

#back-to-top.visible {
  opacity: 1;
  pointer-events: all;
}

#back-to-top:hover {
  background: var(--accent);
  transform: translateY(-3px);
  color: white;
}