/* =========================================================
   VINTAGE ACADEMIC EDITORIAL STYLESHEET
   Konsep: Buku/Jurnal Rapor Akademik Klasik — Parchment Paper,
   Fraunces Serif, Tinta Crimson Wax Seal, & Border Ganda Elegant.
   ========================================================= */

/* UTILITY RULE TERPENTING: Mencegah kebocoran elemen hidden pada CSS grid */
[hidden] {
  display: none !important;
}

:root {
  --paper:           #FAF8F5;
  --paper-card:      #FFFFFF;
  --paper-alt:       #F3EFE6;
  --paper-dark:      #1F1C1A;
  --paper-dark-card: #2B2724;

  --ink-primary:     #1C1917;
  --ink-heading:     #292524;
  --ink-body:        #44403C;
  --ink-muted:       #78716C;
  --ink-light:       #FAF8F5;

  --crimson:         #8B0000;
  --crimson-dim:     #991B1B;
  --crimson-soft:    #FEE2E2;

  --vintage-gold:    #9A6B1F;
  --vintage-gold-bg: #FEF3C7;

  --line:            #D6D0C1;
  --line-light:      #E7E3D7;
  --line-dark:       #44403C;

  --font-serif:      'Fraunces', Georgia, serif;
  --font-sans:       'Plus Jakarta Sans', sans-serif;
  --font-mono:       'IBM Plex Mono', monospace;

  --max-w:           1380px;
  --radius:          4px;
  --shadow-sm:       0 2px 8px rgba(28, 25, 23, 0.04);
  --shadow-md:       0 10px 25px -5px rgba(28, 25, 23, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink-body);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--ink-heading);
  line-height: 1.2;
}

/* Transisi Halus */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade {
  animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* =============== TOPBAR =============== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.1rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  color: var(--ink-heading);
}

.brand-dot {
  color: var(--crimson);
}

.nav {
  display: flex;
  gap: 1.8rem;
  align-items: center;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-muted);
  transition: color 0.2s ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--crimson);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--crimson);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--crimson);
  color: var(--crimson) !important;
  font-weight: 600;
  font-size: 0.86rem;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.nav-cta:hover {
  background: var(--crimson);
  color: #ffffff !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--ink-primary);
}

/* =============== HERO =============== */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4.5rem 2.5rem 1rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--crimson);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.vintage-symbol {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--crimson);
}

.hero-title {
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1.2rem;
}

.hero-name-highlight {
  font-style: italic;
  color: var(--ink-primary);
}

.degree-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--vintage-gold);
  border: 1.5px solid var(--vintage-gold);
  background: var(--vintage-gold-bg);
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  vertical-align: middle;
  margin-left: 0.75rem;
  transform: rotate(-4deg);
}

.hero-lede {
  font-size: 1.1rem;
  color: var(--ink-muted);
  max-width: 48ch;
  margin-bottom: 2.2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  transition: all 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--crimson);
  color: #ffffff;
  border: 1px solid var(--crimson);
}

.btn-primary:hover {
  background: var(--crimson-dim);
  transform: translateY(-2px);
}

.btn-ghost {
  background: var(--paper-card);
  border: 1px solid var(--line);
  color: var(--ink-heading);
}

.btn-ghost:hover {
  border-color: var(--crimson);
  color: var(--crimson);
  transform: translateY(-2px);
}

.hero-photo-wrapper {
  justify-self: center;
}

.hero-photo-card {
  position: relative;
  background: var(--paper-card);
  padding: 0.8rem;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}

.photo-frame-border {
  border: 2px double var(--line);
  padding: 4px;
}

.hero-img {
  width: 280px;
  height: 340px;
  object-fit: cover;
  filter: contrast(1.03) saturate(0.95);
}

.hero-photo-tag {
  position: absolute;
  bottom: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink-primary);
  color: #ffffff;
  padding: 0.45rem 1rem;
  display: flex;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  white-space: nowrap;
}

.tag-role {
  color: var(--paper-alt);
  font-weight: 600;
}

.tag-status {
  color: var(--vintage-gold);
  border-left: 1px solid var(--line-dark);
  padding-left: 0.6rem;
}

/* STAT STRIP (ARCHIVAL LEDGER STYLE) */
.stat-strip-container {
  margin-top: 4.5rem;
  border-top: 2px double var(--line);
  border-bottom: 2px double var(--line);
  background: var(--paper-alt);
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}

.stat-card {
  padding: 1.4rem 1rem;
  border-right: 1px solid var(--line);
  text-align: center;
}

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

.stat-card dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin-bottom: 0.3rem;
}

.stat-card dd {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--crimson);
}

.stat-card-link {
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.stat-card-link:hover {
  background: var(--crimson-soft);
}

.stat-card-link:hover dt {
  color: var(--crimson);
}

/* =============== SECTIONS COMMON =============== */
.section {
  padding: 5.5rem 2.5rem;
}

.section-alt {
  background: var(--paper-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-dark {
  background: var(--paper-dark);
  color: var(--ink-light);
}

.section-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-header {
  margin-bottom: 2.8rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--crimson);
  display: block;
  margin-bottom: 0.4rem;
}

.section-label-light {
  color: var(--vintage-gold);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.3rem);
  font-weight: 700;
}

.section-title-light {
  color: #ffffff;
}

.section-note {
  font-size: 0.92rem;
  color: var(--ink-muted);
  margin-top: 0.4rem;
}

.vintage-divider {
  width: 60px;
  height: 2px;
  background: var(--crimson);
  margin-top: 0.8rem;
}

.divider-light {
  background: var(--vintage-gold);
}

/* =============== TENTANG =============== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: start;
}

.about-copy .lead-text {
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--ink-heading);
  margin-bottom: 1.2rem;
}

.about-copy p {
  color: var(--ink-body);
  margin-bottom: 1rem;
}

.identity-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 1.6rem;
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
}

.identity-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.identity-table tr {
  border-bottom: 1px solid var(--line-light);
}

.identity-table tr:last-child {
  border-bottom: none;
}

.identity-table td {
  padding: 0.65rem 0;
  vertical-align: top;
}

.identity-table td:first-child {
  color: var(--ink-muted);
  font-weight: 500;
  width: 38%;
  padding-right: 0.8rem;
}

.identity-table td:last-child {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-heading);
}

.subblock {
  margin-top: 3.5rem;
}

.subblock-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tag-list li {
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-body);
  transition: all 0.2s ease;
}

.tag-list li:hover {
  border-color: var(--crimson);
  color: var(--crimson);
}

/* =============== PENDIDIKAN =============== */
.edu-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.edu-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--crimson);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
}

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

.edu-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--crimson);
  margin-bottom: 0.6rem;
}

.edu-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.edu-major {
  font-weight: 600;
  color: var(--ink-muted);
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.edu-year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin-bottom: 1rem;
}

.edu-title {
  font-size: 0.88rem;
  color: var(--ink-body);
  background: var(--paper-alt);
  padding: 0.8rem;
  border-left: 3px solid var(--crimson);
  margin-bottom: 1.2rem;
  font-style: italic;
}

.edu-cumlaude {
  margin-top: auto;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--vintage-gold);
  border: 1px solid var(--vintage-gold);
  background: var(--vintage-gold-bg);
  padding: 0.25rem 0.75rem;
}

/* =============== FILTER / RECORD LIST =============== */
.filter-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 260px;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  padding: 0.75rem 1rem 0.75rem 2.6rem;
  border: 1px solid var(--line);
  background: var(--paper-card);
  color: var(--ink-heading);
  outline: none;
  transition: all 0.2s ease;
}

.search-input:focus {
  border-color: var(--crimson);
}

.select-box {
  position: relative;
  min-width: 180px;
}

.select-arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-muted);
  pointer-events: none;
}

.year-select {
  width: 100%;
  appearance: none;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  padding: 0.75rem 2.4rem 0.75rem 1rem;
  border: 1px solid var(--line);
  background: var(--paper-card);
  color: var(--ink-heading);
  outline: none;
  cursor: pointer;
}

.record-list {
  display: flex;
  flex-direction: column;
}

.record-item {
  background: var(--paper-card);
  border-bottom: 1px solid var(--line);
  padding: 1.2rem 1rem;
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 1.5rem;
  align-items: center;
  transition: all 0.2s ease;
}

.record-item:hover {
  background: #FFFDF9;
}

.rec-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--crimson);
}

.rec-title {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--ink-heading);
}

.rec-source {
  display: block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--ink-muted);
  margin-top: 0.25rem;
}

.rec-meta-box {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.4rem;
}

.rec-fund {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--vintage-gold);
  border: 1px solid var(--line);
  padding: 0.25rem 0.6rem;
  text-align: center;
  white-space: nowrap;
}

/* Clickable Underlined Title Links */
.rec-title-link,
.pub-title-link,
.book-title-link,
.hki-title-link {
  color: var(--ink-heading);
  text-decoration: underline;
  text-decoration-color: var(--crimson);
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.rec-title-link:hover,
.pub-title-link:hover,
.book-title-link:hover,
.hki-title-link:hover {
  color: var(--crimson);
  text-decoration-color: var(--crimson-dim);
}

.pub-pending {
  margin-top: auto;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-muted);
  font-style: italic;
}

/* =============== PUBLIKASI =============== */
.pub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.pub-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.pub-card:hover {
  border-color: var(--crimson);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.pub-badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.7rem;
  background: var(--paper-alt);
  color: var(--crimson);
  border: 1px solid var(--line);
  margin-bottom: 0.8rem;
}

.pub-badge.scopus {
  background: #EFF6FF;
  color: #1D4ED8;
  border-color: #BFDBFE;
}

.pub-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.6rem;
}

.pub-meta {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-bottom: 1.2rem;
}

.pub-link {
  margin-top: auto;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--crimson);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.pub-link:hover {
  color: var(--crimson-dim);
}

/* =============== BUKU TABS & GRID =============== */

/* Vintage Index Card Tabs */
.tabs-segmented {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--line);
  padding-bottom: 0;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-weight: 600;
  padding: 0.75rem 1.4rem;
  border: 1px solid var(--line);
  border-bottom: none;
  background: var(--paper-alt);
  color: var(--ink-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  top: 2px;
}

.tab-btn:hover {
  color: var(--ink-heading);
  background: var(--paper-card);
}

.tab-btn.active {
  background: var(--paper-card);
  color: var(--crimson);
  border-color: var(--line);
  border-top: 3px solid var(--crimson);
}

.tab-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  background: rgba(28, 25, 23, 0.08);
  color: var(--ink-heading);
}

.tab-btn.active .tab-badge {
  background: var(--crimson);
  color: #ffffff;
}

/* Grid Layout Buku */
.book-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.book-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 1.4rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
}

.book-card:hover {
  border-color: var(--crimson);
  transform: translateY(-3px);
}

.book-card h4 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  line-height: 1.4;
}

.book-card .book-publisher {
  font-size: 0.85rem;
  color: var(--crimson);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.book-card .book-details {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-top: auto;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--line);
}

/* =============== PENGALAMAN & TIMELINE =============== */
.track-layout {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 2.2rem;
  margin-bottom: 3.5rem;
  align-items: start;
}

.track-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 900px) {
  .track-layout {
    grid-template-columns: 1fr;
  }
}

.timeline {
  border-left: 2px solid var(--line);
  padding-left: 1.4rem;
}

.timeline li {
  position: relative;
  padding-bottom: 1.5rem;
}

.timeline li:last-child {
  padding-bottom: 0;
}

.timeline li::before {
  content: '';
  position: absolute;
  left: -1.75rem;
  top: 0.35rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--crimson);
}

.tl-year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--crimson);
  display: block;
  margin-bottom: 0.2rem;
}

.tl-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-heading);
}

.tl-org {
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.hki-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.hki-item {
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 1.1rem 1.3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: all 0.2s ease;
}

.hki-item:hover {
  border-color: var(--crimson);
}

.hki-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-heading);
}

.hki-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.hki-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--crimson);
  white-space: nowrap;
}

/* =============== KONTAK =============== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-info-card, .contact-links-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.contact-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line-light);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.92rem;
}

.contact-list li:last-child {
  border-bottom: none;
}

.contact-list li span:first-child {
  color: var(--ink-muted);
}

.contact-list li span:last-child {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink-heading);
}

.contact-links-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-heading);
  margin-bottom: 1.2rem;
}

.contact-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.ext-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink-heading);
  padding: 0.8rem 1.2rem;
  font-weight: 600;
  font-size: 0.92rem;
  transition: all 0.2s ease;
}

.ext-btn:hover {
  background: var(--crimson-soft);
  border-color: var(--crimson);
  color: var(--crimson);
}

.ext-btn-highlight {
  background: var(--crimson);
  border-color: var(--crimson);
  color: #ffffff;
}

.ext-btn-highlight:hover {
  background: var(--crimson-dim);
  border-color: var(--crimson-dim);
  color: #ffffff;
}

/* =============== FOOTER =============== */
.footer {
  background: var(--paper-alt);
  color: var(--ink-muted);
  border-top: 2px double var(--line);
  padding: 2.5rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-sub {
  font-size: 0.78rem;
  margin-top: 0.4rem;
  opacity: 0.85;
}

/* =============== RESPONSIVE =============== */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero-photo-wrapper {
    justify-self: start;
    margin-top: 1.5rem;
  }
  .stat-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid, .track-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  .edu-track, .pub-grid, .book-grid, .hki-list {
    grid-template-columns: 1fr;
  }
  
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    border-bottom: 1px solid var(--line);
    display: none;
    gap: 1.2rem;
    box-shadow: var(--shadow-md);
  }
  .nav.open {
    display: flex;
  }
  .nav-toggle {
    display: flex;
  }
}