/* ==========================================================================
   Freeze-Tag Project Website — Premium Academic Research Showcase
   RTL-first, Persian typography excellence, mathematical elegance
   ========================================================================== */

/* Self-hosted Vazirmatn — Persian typography excellence */
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-Medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Vazirmatn';
  src: url('../fonts/Vazirmatn-ExtraBold.woff2') format('woff2');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Brand palette — directly from the poster for visual continuity */
  --color-primary: #57215D;
  --color-primary-dark: #3D1743;
  --color-primary-light: #6E2A76;
  --color-accent-blue: #3FB6DE;
  --color-accent-gold: #D9A441;

  /* Backgrounds & surfaces */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F6F1F8;
  --color-bg-hero: #24122B;

  /* Text */
  --color-ink: #221226;
  --color-ink-muted: #5B5566;
  --color-ink-on-dark: #F4EBF6;
  --color-border: #E4D9E8;

  /* Sizing & rhythm */
  --max-width: 1180px;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 9999px;

  /* Spacing (8px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  /* Typography */
  --font-sans: "Vazirmatn", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Reset & base */
*, *::before, *::after {
  box-sizing: border-box;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.9;
  color: var(--color-ink);
  background: var(--color-bg);
  direction: rtl;
  text-align: right;
}

/* Improve Persian readability */
h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 800;
  margin: 0 0 var(--space-4) 0;
}

p {
  margin: 0 0 var(--space-4) 0;
}

a {
  color: var(--color-accent-blue);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: var(--color-primary);
}

strong {
  font-weight: 700;
}

/* Utility classes */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-6);
  }
}

.section {
  padding-block: var(--space-8);
}

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

@media (max-width: 640px) {
  .section {
    padding-block: 56px;
  }
}

/* Typography scale */
h1.hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-4);
}

@media (max-width: 640px) {
  h1.hero-title {
    font-size: 34px;
  }
}

h2.section-title {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: var(--space-5);
  position: relative;
}

@media (max-width: 640px) {
  h2.section-title {
    font-size: 26px;
  }
}

h3 {
  font-size: 24px;
  font-weight: 600;
}

@media (max-width: 640px) {
  h3 { font-size: 20px; }
}

.text-muted {
  color: var(--color-ink-muted);
}

.kicker {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-3);
  text-transform: none;
}

/* ===== NAV ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 14px;
  gap: var(--space-3);
}

.nav-brand {
  font-weight: 700;
  font-size: 17px;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.nav-brand img {
  flex-shrink: 0;
}

.nav-brand .dot {
  width: 7px;
  height: 7px;
  background: var(--color-accent-gold);
  border-radius: 50%;
  display: inline-block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-ink);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: all 0.2s var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-cta {
  margin-inline-start: var(--space-3);
}

.mobile-only-cta {
  display: none;
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 18px;
  cursor: pointer;
  color: var(--color-ink);
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    inset-inline: 0;
    background: white;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
    gap: var(--space-2);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
  .nav-cta {
    display: none;
  }
  .mobile-only-cta {
    display: block;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  text-decoration: none;
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 10px rgba(87, 33, 93, 0.25);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(87, 33, 93, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-primary-dark);
}

.btn-small {
  font-size: 14px;
  padding: 8px 18px;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #57215D 0%, #3D1743 60%, #24122B 100%);
  color: var(--color-ink-on-dark);
  padding-block: 92px 72px;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 520px;
  gap: var(--space-7);
  align-items: center;
}

@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

.hero-content {
  max-width: 640px;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual img {
  max-width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  transition: transform 0.6s var(--ease);
  display: block;
}

.hero-visual img:hover {
  transform: rotate(0.6deg) scale(1.012);
}

.hero-visual::after {
  content: "پوشش ۱۸ ناحیه‌ای";
  position: absolute;
  bottom: 14px;
  inset-inline-end: 14px;
  font-size: 11px;
  background: rgba(36,18,43,0.65);
  color: rgba(255,255,255,0.85);
  padding: 2px 9px;
  border-radius: 999px;
  letter-spacing: .3px;
}

@media (prefers-reduced-motion: reduce) {
  .hero-visual img:hover { transform: none; }
}

.hero .kicker {
  color: rgba(244, 235, 246, 0.75);
}

.hero h1 {
  color: white;
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: 21px;
  line-height: 1.5;
  color: rgba(244, 235, 246, 0.9);
  margin-bottom: var(--space-5);
  max-width: 560px;
}

.hero-description {
  font-size: 16.5px;
  color: rgba(244, 235, 246, 0.78);
  line-height: 1.75;
  margin-bottom: var(--space-6);
  max-width: 580px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14.5px;
  color: rgba(244, 235, 246, 0.85);
  margin-bottom: var(--space-6);
}

.hero-stats span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Subtle geometric pattern for hero (octahedron motif) */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="220" height="220" viewBox="0 0 220 220" fill="none"><g opacity="0.07"><path d="M110 20 L190 70 L190 150 L110 200 L30 150 L30 70 Z" stroke="white" stroke-width="1.5"/><path d="M110 20 L110 200" stroke="white" stroke-width="1"/><path d="M30 70 L190 150" stroke="white" stroke-width="1"/><path d="M30 150 L190 70" stroke="white" stroke-width="1"/></g></svg>');
  background-repeat: repeat;
  background-size: 170px 170px;
  pointer-events: none;
  mix-blend-mode: screen;
}

/* ===== EXECUTIVE STRIP ===== */
.exec-strip {
  background: var(--color-primary);
  color: white;
  padding-block: var(--space-5);
}

.exec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

@media (max-width: 900px) {
  .exec-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .exec-grid { grid-template-columns: 1fr; }
}

.exec-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.exec-icon {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.12);
  border-radius: 8px;
  font-size: 18px;
}

.exec-item .number {
  font-size: 23px;
  font-weight: 700;
  display: block;
  line-height: 1.05;
  letter-spacing: -0.4px;
  color: #fff;
}

.exec-item .label {
  font-size: 14px;
  opacity: 0.9;
  line-height: 1.4;
}

/* ===== CARDS ===== */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 35px rgba(87, 33, 93, 0.08);
}

.card-alt {
  background: var(--color-bg-alt);
}

.frontier-card {
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s var(--ease), border-color 0.2s;
}

.frontier-card.is-active {
  box-shadow: 0 0 0 2px var(--color-primary);
  border-color: var(--color-primary);
}

.frontier-card .expand-btn {
  margin-top: auto;
  align-self: stretch; /* optional: makes button full width for better tap target */
}

.frontiers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-5);
  align-items: stretch;
  margin-bottom: var(--space-3);
}

/* Full-width breakout expansion panel for proofs */
.expansion-panel {
  margin-top: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  box-shadow: 0 10px 40px rgba(87, 33, 93, 0.08);
  position: relative;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 420ms var(--ease), opacity 300ms ease;
}

.expansion-panel.open {
  opacity: 1;
}

.expansion-panel .expansion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.expansion-panel .expansion-title {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 17px;
}

.expansion-close {
  background: none;
  border: 1px solid var(--color-border);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  color: var(--color-ink-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s var(--ease);
}

.expansion-close:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.expansion-content {
  font-size: 15.2px;
  line-height: 1.85;
}

.expansion-content p {
  margin: 0 0 var(--space-4) 0;
}

.expansion-content p:last-child {
  margin-bottom: 0;
}

.expansion-content .math-block {
  background: #F4EDF8; /* light purple-gray tint */
  border: 1px solid #E4D9E8;
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  margin: var(--space-4) 0;
  font-size: 15px;
  direction: ltr;
  text-align: left;
  overflow-x: auto;
}

.frontier-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.frontier-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.frontier-results {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: var(--space-4) 0;
}

.result-pill {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

.result-pill strong {
  color: var(--color-primary);
}

/* Math accordion */
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  margin-top: auto;
  transition: background 0.2s;
}

.accordion-trigger:hover {
  background: var(--color-bg-alt);
}

.accordion-trigger[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  margin-top: var(--space-4);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--color-ink);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.accordion-content.open {
  display: block;
}

.math-block {
  background: #F4EDF8; /* light purple-gray tint */
  border: 1px solid #E4D9E8;
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  margin: var(--space-3) 0;
  font-size: 15px;
  direction: ltr;
  text-align: left;
  overflow-x: auto;
}

/* ===== RESULTS SECTION ===== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .stat-grid {
    grid-template-columns: repeat(4, minmax(200px, 1fr));
  }
}
@media (max-width: 900px) {
  .stat-grid { grid-template-columns: repeat(2, minmax(170px, 1fr)); }
}
@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
}

.stat-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 18px 22px;
  text-align: center;
  transition: transform 0.25s var(--ease), box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(87,33,93,0.08);
}

.stat-number {
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
  color: var(--color-primary);
  margin-bottom: 2px;
  font-feature-settings: "tnum" "ss01";
  letter-spacing: -1.5px;
  white-space: nowrap;
}



@media (max-width: 640px) {
  .stat-number { font-size: 40px; letter-spacing: -1px; }
}

.stat-label {
  font-size: 13.5px;
  color: var(--color-ink-muted);
  line-height: 1.35;
  word-break: break-word;
}

/* Timeline */
.timeline {
  position: relative;
  margin: var(--space-6) 0;
}

.timeline::before {
  content: "";
  position: absolute;
  inset-inline-start: 19px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  display: flex;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
}

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

.timeline-dot {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-primary);
  flex-shrink: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
}

.timeline-content {
  padding-top: 4px;
}

.timeline-badge {
  display: inline-block;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 6px;
}

.badge-published {
  background: var(--color-primary);
  color: white;
}

.badge-draft {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

/* Results table */
.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  margin-top: var(--space-4);
}

.results-table th,
.results-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  text-align: right;
}

.results-table th {
  font-weight: 600;
  background: var(--color-bg-alt);
  color: var(--color-ink-muted);
  font-size: 13px;
}

.results-table td:first-child {
  font-weight: 500;
}

.results-table .highlight {
  color: var(--color-primary);
  font-weight: 700;
}

.table-toggle {
  font-size: 14px;
  margin-top: var(--space-3);
  color: var(--color-primary);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

/* ===== SIMULATION ===== */
.sim-container {
  background: #FBF8FC;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
}

.sim-image-wrapper {
  position: relative;
  background: #f4f0f7;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: var(--space-4);
  box-shadow: 0 2px 20px rgba(87,33,93,0.08), inset 0 0 0 1px var(--color-border);
}

.sim-image-wrapper img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: contain;
  background: #f9f6fb;
  transition: opacity 120ms ease;
}

.sim-controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.sim-scrubber {
  flex: 1;
  min-width: 220px;
  accent-color: var(--color-primary);
}

.sim-step-label {
  font-size: 14px;
  font-weight: 600;
  min-width: 140px;
  color: var(--color-ink-muted);
  font-feature-settings: "tnum";
}

.sim-buttons {
  display: flex;
  gap: var(--space-2);
}

.sim-meta {
  font-size: 13.5px;
  color: var(--color-ink-muted);
  margin-top: var(--space-3);
}

/* ===== TIMELINE & PUBLICATIONS ===== */
.pub-list {
  list-style: none;
  padding: 0;
  margin: var(--space-5) 0 0;
}

.pub-list li {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.ref {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.ref-box {
  background: #FBF8FC;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-5);
}

.ref-box h3 {
  color: var(--color-primary);
  font-weight: 600;
}

/* ===== FAQ ===== */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: right;
  background: transparent;
  border: none;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--color-ink);
}

.faq-question:hover {
  background: var(--color-bg-alt);
}

.faq-answer {
  display: none;
  padding: 0 20px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-ink-muted);
}

.faq-answer.open {
  display: block;
}

/* ===== DOWNLOADS ===== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-4);
}

.download-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  transition: transform .2s var(--ease), box-shadow .2s;
}

.download-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(87,33,93,0.07);
}

.download-card .icon {
  font-size: 28px;
  margin-bottom: var(--space-3);
}

.download-card h4 {
  margin: 0 0 4px;
}

.download-card p {
  font-size: 14px;
  color: var(--color-ink-muted);
  flex: 1;
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

@media (max-width: 800px) {
  .about-grid { grid-template-columns: 1fr; }
}

.person {
  display: flex;
  gap: var(--space-4);
}

.person-avatar {
  width: 72px;
  height: 72px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  font-weight: 700;
  color: var(--color-primary);
}

.person-info h3 {
  margin: 2px 0 6px;
}

.person-info h3 a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s var(--ease);
}

.person-info h3 a:hover {
  text-decoration-color: var(--color-primary-dark);
}

.person-bio {
  font-size: 15px;
  line-height: 1.75;
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--color-bg-alt);
  padding: var(--space-6) 0;
  font-size: 14px;
  color: var(--color-ink-muted);
  border-top: 1px solid var(--color-border);
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Math specific */
.katex {
  font-size: 1.02em !important;
}

.math, .math-inline {
  direction: ltr !important;
  unicode-bidi: isolate;
  text-align: left;
  display: inline-block;
}

.math-block {
  direction: ltr !important;
  text-align: left;
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

button:focus-visible {
  outline-offset: 2px;
}

/* Subtle premium touches */
.section-title::after {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  background: linear-gradient(to left, var(--color-accent-gold), var(--color-primary));
  margin-top: 10px;
  border-radius: 3px;
}

/* Make sure LTR content inside RTL page is handled */
.ltr {
  direction: ltr;
  text-align: left;
}

/* Responsive tweaks */
@media (max-width: 640px) {
  .hero {
    padding-block: 60px 48px;
  }
  .stat-number {
    font-size: 38px;
  }
}