/* ============================================================
   BUET Department of Chemical Engineering — Main Stylesheet
   ============================================================ */

/* ── CSS Custom Properties ─────────────────────────────────── */
:root {
  --navy:        #002147;
  --navy-dark:   #001530;
  --navy-light:  #003370;
  --gold:        #C9A94B;
  --gold-light:  #e0c070;
  --gold-dark:   #a88830;
  --white:       #ffffff;
  --off-white:   #f8f7f4;
  --gray-100:    #f2f1ee;
  --gray-200:    #e4e2dc;
  --gray-400:    #9b9790;
  --gray-600:    #5a5650;
  --gray-800:    #2e2c28;
  --text-body:   #333230;

  /* Typography */
  --font-serif:  'EB Garamond', 'Garamond', 'Times New Roman', Georgia, serif;
  --font-sans:   'Source Sans 3', 'Source Sans Pro', 'Segoe UI', system-ui, sans-serif;
  --font-mono:   'Courier New', monospace;

  /* Spacing scale */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Sizes */
  --max-width: 1200px;
  --nav-height: 70px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.14);

  /* Transitions */
  --ease: 0.25s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  color: var(--text-body);
  background: var(--white);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }
a  { color: var(--navy); text-decoration: none; transition: color var(--ease); }
a:hover { color: var(--gold-dark); }
ul { list-style: none; }

/* ── Google Fonts import ───────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

/* ── Utility Classes ───────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.section {
  padding: var(--sp-20) 0;
}

.section--alt {
  background: var(--off-white);
}

/* Section heading component */
.section-heading {
  margin-bottom: var(--sp-12);
}

.section-heading__label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-bottom: var(--sp-2);
}

.section-heading__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 500;
  color: var(--navy);
  line-height: 1.2;
  margin-bottom: var(--sp-4);
}

.section-heading__line {
  width: 56px;
  height: 3px;
  background: var(--gold);
  border: none;
  margin: 0;
}

.section-heading--center {
  text-align: center;
}

.section-heading--center .section-heading__line {
  margin: 0 auto;
}

/* Text utilities */
.text-navy  { color: var(--navy); }
.text-gold  { color: var(--gold); }
.text-muted { color: var(--gray-600); }

.font-serif { font-family: var(--font-serif); }
.font-sans  { font-family: var(--font-sans); }

/* Button styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.65rem 1.5rem;
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--ease);
  text-decoration: none;
}

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

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

.btn--outline {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy);
}

.btn--outline:hover {
  background: var(--navy);
  color: var(--white);
}

.btn--gold {
  background: var(--gold);
  color: var(--navy-dark);
  border-color: var(--gold);
}

.btn--gold:hover {
  background: var(--gold-dark);
  border-color: var(--gold-dark);
  color: var(--white);
}

.btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}

.btn--ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--white);
  color: var(--white);
}

/* Card base */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
  transition: box-shadow var(--ease), transform var(--ease);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Tag / badge */
.tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  background: var(--gray-100);
  color: var(--gray-600);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 2px;
}

.tag--gold {
  background: rgba(201,169,75,0.12);
  color: var(--gold-dark);
}

.tag--navy {
  background: var(--navy);
  color: var(--white);
}

/* ── TOP ANNOUNCEMENT BAR ──────────────────────────────────── */
.topbar {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.75);
  font-size: 0.8rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(201,169,75,0.3);
}

.topbar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-4);
}

.topbar__links {
  display: flex;
  gap: var(--sp-6);
}

.topbar__links a {
  color: rgba(255,255,255,0.65);
  font-size: 0.78rem;
  transition: color var(--ease);
}

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

/* ── NAVIGATION ─────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--navy);
  height: var(--nav-height);
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--sp-8);
}

/* Logo */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  text-decoration: none;
  flex-shrink: 0;
}

.navbar__logo-icon {
  width: 44px;
  height: 44px;
  background: none; /* var(--gold); */
  border-radius: 0; /* 50%; */
  /* display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy-dark);
  flex-shrink: 0;
  letter-spacing: -0.02em; */
}

.navbar__logo-text {
  display: flex;
  flex-direction: column;
}

.navbar__logo-dept {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.2;
}

.navbar__logo-univ {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
  font-weight: 400;
}

/* Main nav */
.navbar__nav {
  display: flex;
  align-items: center;
  gap: 0;
  height: 100%;
}

.nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 0 var(--sp-4);
  height: 100%;
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color var(--ease), background var(--ease);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--sp-4);
  right: var(--sp-4);
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform var(--ease);
}

.nav-link:hover,
.nav-link.active {
  color: var(--white);
  background: rgba(255,255,255,0.05);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

/* Dropdown */
.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 210px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-top: 3px solid var(--gold);
  box-shadow: var(--shadow-lg);
  padding: var(--sp-2) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.2s ease;
  z-index: 100;
}

.dropdown__item {
  display: block;
  padding: 0.55rem var(--sp-6);
  font-size: 0.85rem;
  color: var(--gray-800);
  border-left: 3px solid transparent;
  transition: all var(--ease);
}

.dropdown__item:hover {
  background: var(--off-white);
  border-left-color: var(--gold);
  color: var(--navy);
}

/* Chevron indicator */
.nav-link .chevron {
  font-size: 0.6rem;
  opacity: 0.6;
}

/* Mobile hamburger */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-2);
}

.navbar__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ── HERO SECTION ───────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 60%, #0a3060 100%);
  color: var(--white);
  padding: var(--sp-24) 0 var(--sp-20);
  position: relative;
  overflow: hidden;
}

/* Decorative geometric shapes */
.hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 420px;
  height: 420px;
  border: 80px solid rgba(201,169,75,0.07);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30px;
  left: 10%;
  width: 200px;
  height: 200px;
  border: 40px solid rgba(201,169,75,0.05);
  border-radius: 50%;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}

.hero__eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--sp-4);
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 500;
  line-height: 1.15;
  margin-bottom: var(--sp-6);
  color: var(--white);
}

.hero__title span {
  color: var(--gold);
}

.hero__desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: var(--sp-8);
}

.hero__actions {
  display: flex;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

/* Hero stats panel */
.hero__stats {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  padding: var(--sp-8);
  backdrop-filter: blur(8px);
}

.hero__stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
}

.stat-item {
  text-align: center;
  padding: var(--sp-4);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.stat-item:nth-child(n+3) {
  border-bottom: none;
  padding-top: var(--sp-4);
}

.stat-item__number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
  margin-bottom: var(--sp-1);
}

.stat-item__label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}

/* ── QUICK HIGHLIGHTS ──────────────────────────────────────── */
.highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--gray-200);
}

.highlight-card {
  padding: var(--sp-10) var(--sp-8);
  border-right: 1px solid var(--gray-200);
  position: relative;
  transition: background var(--ease);
}

.highlight-card:last-child { border-right: none; }

.highlight-card:hover { background: var(--off-white); }

.highlight-card__icon {
  width: 48px;
  height: 48px;
  background: rgba(201,169,75,0.12);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-4);
  font-size: 1.4rem;
}

.highlight-card__title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: var(--sp-2);
}

.highlight-card__desc {
  font-size: 0.88rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: var(--sp-4);
}

.highlight-card__link {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--gold-dark);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  letter-spacing: 0.02em;
}

.highlight-card__link::after {
  content: '→';
}

/* ── NEWS CARDS ─────────────────────────────────────────────── */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.news-card {
  display: flex;
  flex-direction: column;
}

.news-card__img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--gray-100);
}

.news-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.news-card:hover .news-card__img img {
  transform: scale(1.03);
}

.news-card__body {
  padding: var(--sp-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card__meta {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  margin-bottom: var(--sp-3);
}

.news-card__date {
  font-size: 0.75rem;
  color: var(--gray-400);
  font-weight: 500;
}

.news-card__title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  line-height: 1.4;
  margin-bottom: var(--sp-3);
}

.news-card__title a:hover { color: var(--gold-dark); }

.news-card__excerpt {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.65;
  flex: 1;
  margin-bottom: var(--sp-4);
}

.news-card__readmore {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--gold-dark);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ── NOTICES SECTION ────────────────────────────────────────── */
.notices-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.notice-item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--gray-200);
  transition: background var(--ease);
}

.notice-item:first-child { border-top: 1px solid var(--gray-200); }

.notice-item__date {
  flex-shrink: 0;
  width: 52px;
  text-align: center;
  background: var(--navy);
  color: var(--white);
  border-radius: 3px;
  padding: var(--sp-1) var(--sp-2);
}

.notice-item__day {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1;
}

.notice-item__month {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.8;
}

.notice-item__content { flex: 1; }

.notice-item__title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: var(--sp-1);
  line-height: 1.4;
}

.notice-item__title a:hover { color: var(--gold-dark); }

.notice-item__type {
  font-size: 0.72rem;
  color: var(--gray-400);
}

.notice-item__dl {
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--gold-dark);
  font-weight: 600;
}

/* ── HEAD MESSAGE ───────────────────────────────────────────── */
.head-message {
  background: var(--navy);
  color: var(--white);
  padding: var(--sp-20) 0;
  position: relative;
  overflow: hidden;
}

.head-message::before {
  content: '"';
  position: absolute;
  top: -20px;
  left: 5%;
  font-family: var(--font-serif);
  font-size: 20rem;
  color: rgba(201,169,75,0.05);
  line-height: 1;
  pointer-events: none;
}

.head-message__inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--sp-12);
  align-items: start;
  position: relative;
  z-index: 1;
}

.head-message__photo {
  border-radius: 4px;
  overflow: hidden;
  border: 3px solid var(--gold);
}

.head-message__photo img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.head-message__photo-placeholder {
  width: 100%;
  aspect-ratio: 4/5;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: rgba(255,255,255,0.3);
}

.head-message__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--sp-4);
}

.head-message__text {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: rgba(255,255,255,0.9);
  line-height: 1.8;
  margin-bottom: var(--sp-6);
}

.head-message__name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
}

.head-message__title {
  font-size: 0.82rem;
  color: var(--gold);
}

/* ── FACULTY CARDS ──────────────────────────────────────────── */
.faculty-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: var(--sp-6);
}

.faculty-card {
  text-align: center;
  padding: var(--sp-8) var(--sp-6);
}

.faculty-card__photo {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto var(--sp-4);
  border: 3px solid var(--gray-200);
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--gray-400);
  transition: border-color var(--ease);
}

.faculty-card:hover .faculty-card__photo {
  border-color: var(--gold);
}

.faculty-card__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.faculty-card__name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: var(--sp-1);
}

.faculty-card__designation {
  font-size: 0.8rem;
  color: var(--gold-dark);
  font-weight: 600;
  margin-bottom: var(--sp-2);
}

.faculty-card__email {
  font-size: 0.78rem;
  color: var(--gray-600);
  margin-bottom: var(--sp-3);
  word-break: break-all;
}

.faculty-card__interests {
  font-size: 0.77rem;
  color: var(--gray-400);
  line-height: 1.5;
  font-style: italic;
}

/* ── RESEARCH AREA CARDS ────────────────────────────────────── */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: var(--sp-6);
}

.research-card {
  padding: var(--sp-8);
  border-left: 4px solid var(--gold);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-left: 4px solid var(--gold);
  transition: box-shadow var(--ease), transform var(--ease);
}

.research-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.research-card__icon {
  font-size: 2rem;
  margin-bottom: var(--sp-4);
}

.research-card__title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: var(--sp-3);
}

.research-card__desc {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin-bottom: var(--sp-4);
}

.research-card__link {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--gold-dark);
  letter-spacing: 0.04em;
}

/* ── PAGE BANNER (inner pages) ──────────────────────────────── */
.page-banner {
  background: linear-gradient(135deg, var(--navy-dark), var(--navy));
  color: var(--white);
  padding: var(--sp-16) 0 var(--sp-12);
  border-bottom: 4px solid var(--gold);
}

.page-banner__breadcrumb {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: var(--sp-4);
}

.page-banner__breadcrumb a {
  color: rgba(255,255,255,0.55);
}

.page-banner__breadcrumb a:hover { color: var(--gold); }

.page-banner__breadcrumb span { color: rgba(255,255,255,0.3); }

.page-banner__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 500;
  line-height: 1.2;
}

.page-banner__subtitle {
  margin-top: var(--sp-3);
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
}

/* ── SIDEBAR LAYOUT ─────────────────────────────────────────── */
.content-with-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--sp-12);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--sp-8));
}

.sidebar-widget {
  background: var(--off-white);
  border: 1px solid var(--gray-200);
  border-top: 3px solid var(--navy);
  padding: var(--sp-6);
  margin-bottom: var(--sp-6);
}

.sidebar-widget__title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--gray-200);
}

.sidebar-nav__item {
  display: block;
  padding: var(--sp-2) 0;
  font-size: 0.875rem;
  color: var(--gray-800);
  border-bottom: 1px solid var(--gray-200);
  transition: color var(--ease);
}

.sidebar-nav__item:last-child { border-bottom: none; }

.sidebar-nav__item:hover,
.sidebar-nav__item.active {
  color: var(--gold-dark);
  padding-left: var(--sp-2);
}

/* ── TABLES ─────────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th {
  background: var(--navy);
  color: var(--white);
  padding: 0.75rem var(--sp-4);
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

.data-table td {
  padding: 0.7rem var(--sp-4);
  border-bottom: 1px solid var(--gray-200);
  color: var(--text-body);
}

.data-table tr:hover td { background: var(--off-white); }

/* ── CONTACT ─────────────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: start;
}

.contact-info__item {
  display: flex;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.contact-info__icon {
  width: 40px;
  height: 40px;
  background: var(--navy);
  color: var(--white);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.contact-info__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-400);
  margin-bottom: var(--sp-1);
}

.contact-info__value {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* Contact form */
.form-group {
  margin-bottom: var(--sp-4);
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: var(--sp-2);
  letter-spacing: 0.03em;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.65rem var(--sp-4);
  border: 1px solid var(--gray-200);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--text-body);
  background: var(--white);
  transition: border-color var(--ease), box-shadow var(--ease);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(0,33,71,0.08);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

/* ── MAP ─────────────────────────────────────────────────────── */
.map-wrapper {
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
  margin-top: var(--sp-8);
}

.map-wrapper iframe {
  display: block;
  width: 100%;
  height: 380px;
}

/* ── GALLERY ─────────────────────────────────────────────────── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--sp-3);
}

.gallery-item {
  overflow: hidden;
  border-radius: 3px;
  aspect-ratio: 4/3;
  background: var(--gray-100);
  cursor: pointer;
  position: relative;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.gallery-item:hover img { transform: scale(1.05); }

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,21,48,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--ease);
  color: var(--white);
  font-size: 1.8rem;
}

.gallery-item:hover .gallery-item__overlay { opacity: 1; }

/* ── TIMELINE ────────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: var(--sp-10);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold), var(--navy));
}

.timeline-item {
  position: relative;
  margin-bottom: var(--sp-10);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--sp-10) - 4px);
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px var(--gold);
}

.timeline-item__year {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--gold-dark);
  margin-bottom: var(--sp-1);
}

.timeline-item__title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: var(--sp-2);
}

.timeline-item__text {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.65;
}

/* ── TABS ────────────────────────────────────────────────────── */
.tabs {
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: var(--sp-8);
  display: flex;
  gap: 0;
}

.tab-btn {
  padding: var(--sp-3) var(--sp-6);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-600);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--ease);
  letter-spacing: 0.02em;
}

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

.tab-btn.active {
  color: var(--navy);
  border-bottom-color: var(--gold);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── QUICK LINKS SECTION ─────────────────────────────────────── */
.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--sp-4);
}

.quick-link-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-6) var(--sp-4);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 4px;
  text-align: center;
  transition: all var(--ease);
  text-decoration: none;
}

.quick-link-item:hover {
  border-color: var(--gold);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
  color: var(--navy);
}

.quick-link-item__icon {
  width: 44px;
  height: 44px;
  background: var(--navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  font-size: 1.2rem;
}

.quick-link-item__label {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--navy);
}

/* ── FOOTER ──────────────────────────────────────────────────── */
.footer {
  background: var(--navy-dark);
  color: rgba(255,255,255,0.75);
  margin-top: auto;
}

.footer__main {
  padding: var(--sp-16) 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-10);
}

.footer-col__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.footer-col__logo-icon {
  width: 40px;
  height: 40px;
  background: none; /* var(--gold); */
  border-radius: 0; /* 50%; */
   /*
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--navy-dark);
  font-size: 0.95rem;
   */
}

.footer-col__logo-text {
  font-family: var(--font-serif);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
}

.footer-col__desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--sp-6);
}

.footer-col__social {
  display: flex;
  gap: var(--sp-3);
}

.social-link {
  width: 34px;
  height: 34px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  transition: all var(--ease);
  text-decoration: none;
}

.social-link:hover {
  background: var(--gold);
  color: var(--navy-dark);
}

.footer-col__title {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--sp-4);
}

.footer-nav__item {
  display: block;
  padding: var(--sp-1) 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--ease);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.footer-nav__item:hover {
  color: var(--white);
  padding-left: var(--sp-2);
}

.footer__bottom {
  padding: var(--sp-4) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-4);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

.footer__bottom a {
  color: rgba(255,255,255,0.4);
}

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

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__desc { max-width: 100%; }
  .hero__actions { justify-content: center; }

  .hero__stats {
    max-width: 480px;
    margin: 0 auto;
  }

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

  .content-with-sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar { position: static; }
}

/* ── Prevent body scroll when mobile nav is open ────────────── */
body.nav-open {
  overflow: hidden;
}

/* ── Tablet breakpoint ──────────────────────────────────────── */
@media (max-width: 900px) {
  .navbar__toggle { display: flex; }

  .navbar__nav {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--navy-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--sp-4) var(--sp-6) var(--sp-10);
    gap: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    height: auto;
    /* Slide-in animation */
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.28s ease;
    opacity: 0;
    z-index: 999;
  }

  .navbar__nav.open {
    display: flex;
    transform: translateX(0);
    opacity: 1;
  }

  /* Overlay scrim behind open menu */
  .navbar__nav.open::before {
    display: none; /* handled by body.nav-open scroll-lock */
  }

  .nav-item {
    width: 100%;
    height: auto;
    border-bottom: 1px solid rgba(255,255,255,0.07);
  }

  .nav-item:first-child {
    border-top: 1px solid rgba(255,255,255,0.07);
  }

  .nav-link {
    width: 100%;
    padding: var(--sp-4) var(--sp-2);
    height: auto;
    /* Ensure adequate tap target */
    min-height: 48px;
    justify-content: space-between;
  }

  .nav-link::after { display: none; }

  /* Chevron rotates when dropdown is open */
  .nav-item.open > .nav-link .chevron {
    transform: rotate(180deg);
    transition: transform 0.2s ease;
  }

  .nav-link .chevron {
    transition: transform 0.2s ease;
  }

  /* Dropdown becomes accordion panel */
  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-left: 3px solid var(--gold);
    background: rgba(255,255,255,0.04);
    padding: var(--sp-1) 0;
    display: none;
    /* Animate open */
    animation: none;
  }

  .nav-item.open .dropdown { display: block; }

  .dropdown__item {
    color: rgba(255,255,255,0.7);
    padding: 0.7rem var(--sp-6);
    min-height: 44px;
    display: flex;
    align-items: center;
    border-left: none;
  }

  .dropdown__item:hover,
  .dropdown__item:focus {
    background: rgba(255,255,255,0.07);
    color: var(--white);
    padding-left: var(--sp-6);
  }

  .topbar { display: none; }

  /* Layout overrides */
  .highlights { grid-template-columns: 1fr; }
  .highlight-card { border-right: none; border-bottom: 1px solid var(--gray-200); }
  .highlight-card:last-child { border-bottom: none; }

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

/* ── Mobile breakpoint ──────────────────────────────────────── */
@media (max-width: 768px) {
  :root { --nav-height: 60px; }

  .news-grid { grid-template-columns: 1fr; }
  .hero__stats-grid { grid-template-columns: 1fr 1fr; }

  .head-message__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .head-message__photo {
    max-width: 160px;
    margin: 0 auto;
  }

  .footer__main {
    grid-template-columns: 1fr;
    gap: var(--sp-8);
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .quick-links-grid { grid-template-columns: repeat(2, 1fr); }
  .faculty-grid { grid-template-columns: repeat(2, 1fr); }
  .research-grid { grid-template-columns: 1fr; }

  /* Tabs: horizontally scrollable on mobile */
  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
    padding-bottom: 1px;
  }
  .tabs::-webkit-scrollbar { display: none; }

  .tab-btn {
    flex-shrink: 0;
    padding: var(--sp-3) var(--sp-4);
    min-height: 44px;
  }

  /* Container padding tighter on mobile */
  .container { padding: 0 var(--sp-4); }

  /* Page banner padding */
  .page-banner { padding: var(--sp-12) 0 var(--sp-8); }

  /* Logo text: hide university line on very small screens */
  .navbar__logo-univ { display: none; }

  /* Ensure logo doesn't get crushed */
  .navbar__logo { gap: var(--sp-2); }
  .navbar__logo-icon { width: 36px; height: 36px; }
  .navbar__logo-dept { font-size: 0.85rem; }
}

@media (max-width: 480px) {
  .faculty-grid { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .section { padding: var(--sp-12) 0; }
  .quick-links-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── PRINT ───────────────────────────────────────────────────── */
@media print {
  .navbar, .topbar, .footer, .hero__actions { display: none; }
  .hero { background: none; color: var(--navy); padding: var(--sp-8) 0; }
}

/* ── Extra small phones (≤ 480px) — tap target & sizing fixes ── */
@media (max-width: 480px) {
  .btn, .nav-link, .dropdown__item, .tab-btn,
  .footer-nav__item, .sidebar-nav__item {
    min-height: 44px;
  }
  .navbar__logo-dept { font-size: 0.8rem; }
  .navbar__logo-icon { width: 32px; height: 32px; }
}