/* ============================================
   MODEL RECON — Global Styles
   Clean white, Comic Sans, responsive
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Comic+Neue:ital,wght@0,300;0,400;0,700;1,400&display=swap');

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

:root {
  --font: 'Comic Sans MS', 'Comic Sans', 'Chalkboard SE', 'Comic Neue', cursive;
  --font-fallback: 'Comic Neue', 'Comic Sans MS', cursive;
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #555555;
  --color-accent: #1a1a1a;
  --color-accent-light: #f5f5f5;
  --color-border: #e0e0e0;
  --color-hover: #f0f0f0;
  --max-width: 900px;
  --nav-height: 60px;
  --radius: 8px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
}

/* Force Comic Sans on every text element */
h1, h2, h3, h4, h5, h6, p, a, span, li, td, th, div, button, input, textarea {
  font-family: var(--font);
}

/* ---- CONTAINER ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1.5px solid var(--color-border);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
}

.nav-logo {
  display: block;
  height: 38px;
  width: auto;
  object-fit: contain;
}

.nav-brand {
  font-family: var(--font);
  font-size: 1.2rem;
  font-weight: bold;
  letter-spacing: -0.02em;
  color: var(--color-text);
  display: flex;
  align-items: center;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--color-muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--color-text);
  padding: 4px 8px;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: 80px 24px 60px;
  text-align: center;
  border-bottom: 1.5px solid var(--color-border);
}

.hero h1 {
  font-family: var(--font);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   PAGE HEADER (inner pages)
   ============================================ */
.page-header {
  padding: 60px 24px 40px;
  border-bottom: 1.5px solid var(--color-border);
  text-align: center;
}

.page-header h1 {
  font-family: var(--font);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin-bottom: 12px;
}

.page-header .subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   SECTIONS
   ============================================ */
.about-section,
.content-section {
  padding: 64px 0;
  border-bottom: 1.5px solid var(--color-border);
}

.about-section h2,
.content-section h2 {
  font-family: var(--font);
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.about-section p,
.content-section p {
  color: var(--color-muted);
  margin-bottom: 16px;
  max-width: 700px;
}

/* ---- CTA BOX ---- */
.cta-box {
  margin-top: 40px;
  padding: 32px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-accent-light);
}

.cta-box h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.cta-box p {
  margin-bottom: 20px;
}

.btn {
  display: inline-block;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--color-bg);
  background: var(--color-text);
  padding: 10px 24px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: opacity var(--transition);
}

.btn:hover {
  opacity: 0.8;
}

/* ============================================
   CARD GRID (Home explore)
   ============================================ */
.links-section {
  padding: 64px 0;
}

.links-section h2 {
  font-family: var(--font);
  font-size: 1.6rem;
  margin-bottom: 32px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.card {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: background var(--transition), border-color var(--transition);
}

.card:hover {
  background: var(--color-accent-light);
  border-color: #bbb;
}

.card-icon {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.card h3 {
  font-family: var(--font);
  font-size: 1rem;
  margin-bottom: 8px;
}

.card p {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.5;
}

/* ============================================
   RESEARCH / TECHNIQUES CONTENT
   ============================================ */
.topic-list {
  list-style: none;
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topic-item {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.topic-item h3 {
  font-family: var(--font);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.topic-item p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin: 0;
  max-width: 100%;
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 8px;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   PAPER PAGE
   ============================================ */
.paper-meta {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.paper-meta span {
  font-size: 0.82rem;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 3px 10px;
}

.paper-content {
  padding: 48px 0 64px;
}

.paper-content h2 {
  font-family: var(--font);
  font-size: 1.3rem;
  margin: 40px 0 12px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 6px;
}

.paper-content h3 {
  font-family: var(--font);
  font-size: 1.05rem;
  margin: 28px 0 8px;
  color: var(--color-text);
}

.paper-content p {
  color: var(--color-muted);
  margin-bottom: 16px;
  font-size: 0.95rem;
  max-width: 720px;
}

.paper-content a {
  color: var(--color-text);
  font-size: 0.85rem;
  text-decoration: underline;
}

.paper-content a:hover {
  opacity: 0.65;
}

.abstract-box {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--color-accent-light);
  margin: 32px 0;
}

.abstract-box h2 {
  border: none;
  margin-top: 0;
  padding-bottom: 0;
  font-size: 1.05rem;
}

.abstract-box p {
  font-size: 0.9rem;
  max-width: 100%;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 28px;
  font-size: 0.88rem;
  font-family: var(--font);
}

.data-table th,
.data-table td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}

.data-table th {
  background: var(--color-accent-light);
  font-weight: bold;
}

.data-table tr:nth-child(even) td {
  background: #fafafa;
}

.source-link {
  display: inline-block;
  margin: 4px 0 20px;
  font-size: 0.82rem;
  color: var(--color-muted);
  text-decoration: underline;
}

.phases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 16px 0 28px;
}

.phase-card {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

.phase-card .phase-num {
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.phase-card h4 {
  font-family: var(--font);
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.phase-card p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0;
  max-width: 100%;
}

/* ============================================
   ME PAGE
   ============================================ */
.me-section {
  padding: 64px 0;
}

.me-section h2 {
  font-family: var(--font);
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.me-section p {
  color: var(--color-muted);
  margin-bottom: 16px;
  max-width: 680px;
}

.me-section a {
  color: var(--color-text);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  border-top: 1.5px solid var(--color-border);
  padding: 32px 24px;
  margin-top: 0;
}

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

.footer-brand {
  font-family: var(--font);
  font-weight: bold;
  font-size: 1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.footer-links a {
  color: var(--color-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-copy {
  font-size: 0.8rem;
  color: #999;
  width: 100%;
  margin-top: 8px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  .navbar {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 20px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 8px 0 12px;
    gap: 4px;
    align-items: flex-start;
  }

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

  .nav-links a {
    width: 100%;
    padding: 8px 12px;
  }

  .hero {
    padding: 48px 20px 40px;
  }

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

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

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}