/* ============================================================
   Christopher Monterola — Personal Website
   Design System: Minimalist Executive (iOS-inspired)
   Accent: Tangerine #F07523
   ============================================================ */

:root {
  --tangerine:       #F07523;
  --tangerine-light: #FFF3EC;
  --tangerine-mid:   #FDDEC9;
  --tangerine-dark:  #C85D0F;
  --text-primary:    #111111;
  --text-secondary:  #555555;
  --text-muted:      #999999;
  --bg:              #FFFFFF;
  --surface:         #F8F8F8;
  --surface-2:       #F2F2F2;
  --border:          #E8E8E8;
  --border-light:    #F0F0F0;
  --nav-height:      64px;
  --max-width:       880px;
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Text',
          'Helvetica Neue', 'Segoe UI', Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display',
          'Helvetica Neue', 'Segoe UI', Arial, sans-serif;
  --radius:          10px;
  --radius-sm:       6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow:    0 4px 16px rgba(0,0,0,0.07), 0 1px 4px rgba(0,0,0,0.04);
  --transition: 0.2s ease;
}

/* ── Reset ───────────────────────────────────────────────── */
*, *::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);
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
}
img { display: block; max-width: 100%; }
a { color: var(--tangerine); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.75; }

/* ── Navigation ──────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 100;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(0,0,0,0.07);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.2px;
}
.nav-logo span { color: var(--tangerine); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}
.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 450;
  padding: 6px 10px;
  border-radius: 6px;
  transition: all var(--transition);
  letter-spacing: -0.1px;
}
.nav-links a:hover { color: var(--text-primary); background: var(--surface); opacity: 1; }
.nav-links a.active { color: var(--tangerine); font-weight: 500; }

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  border: none;
  background: none;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: all var(--transition);
}

/* ── Page Wrapper ────────────────────────────────────────── */
.page-wrapper {
  padding-top: var(--nav-height);
  min-height: 100vh;
}
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Hero (Home) ─────────────────────────────────────────── */
.hero {
  padding: 80px 0 72px;
  border-bottom: 1px solid var(--border-light);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 148px;
  gap: 40px;
  align-items: center;
}
.hero-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--tangerine);
  margin-bottom: 14px;
}
.hero-name {
  font-family: var(--font-display);
  font-size: 46px;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -1.5px;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.hero-title {
  font-size: 17px;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: -0.2px;
  margin-bottom: 4px;
}
.hero-institution {
  font-size: 14px;
  color: var(--tangerine);
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-tagline {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 28px;
  letter-spacing: -0.1px;
}
.hero-bio {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.1px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--tangerine);
  color: #fff;
}
.btn-primary:hover { background: var(--tangerine-dark); opacity: 1; color: #fff; }
.btn-ghost {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text-primary); opacity: 1; }

/* Avatar placeholder */
.avatar {
  width: 148px; height: 148px;
  border-radius: 50%;
  background: var(--tangerine-light);
  border: 3px solid var(--tangerine-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.avatar-initials {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 600;
  color: var(--tangerine);
  letter-spacing: -2px;
  user-select: none;
}

/* ── Page Header (inner pages) ───────────────────────────── */
.page-header {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border-light);
}
.page-header-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--tangerine);
  margin-bottom: 10px;
}
.page-header h1 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.page-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.65;
}

/* ── Section ─────────────────────────────────────────────── */
.section { padding: 56px 0; }
.section + .section { border-top: 1px solid var(--border-light); }
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--tangerine);
  margin-bottom: 20px;
}
.section-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 650;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.section-body {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text-secondary);
}
.section-body p + p { margin-top: 14px; }

/* ── Interest Tags ───────────────────────────────────────── */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  background: var(--tangerine-light);
  color: var(--tangerine-dark);
  font-size: 13px;
  font-weight: 500;
  padding: 5px 13px;
  border-radius: 20px;
  border: 1px solid var(--tangerine-mid);
}

/* ── Timeline ────────────────────────────────────────────── */
.timeline { list-style: none; position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 7px; top: 6px; bottom: 6px;
  width: 1px;
  background: var(--border);
}
.timeline-item {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 18px;
  margin-bottom: 32px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--tangerine);
  margin-top: 3px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.timeline-content {}
.timeline-date {
  font-size: 12px;
  font-weight: 500;
  color: var(--tangerine);
  letter-spacing: 0.2px;
  margin-bottom: 3px;
}
.timeline-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.1px;
  margin-bottom: 2px;
}
.timeline-sub {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.timeline-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── People Cards ────────────────────────────────────────── */
.people-group + .people-group { margin-top: 48px; }
.people-group-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-light);
}
.people-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.person-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: all var(--transition);
}
.person-card:hover { box-shadow: var(--shadow); border-color: var(--tangerine-mid); }
.person-name {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}
.person-detail {
  font-size: 13px;
  color: var(--text-muted);
}
.person-year {
  font-size: 12px;
  color: var(--tangerine);
  font-weight: 500;
  margin-top: 8px;
}

/* ── Publications ────────────────────────────────────────── */
.pub-year-group + .pub-year-group { margin-top: 40px; }
.pub-year-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--tangerine);
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.pub-list { list-style: none; }
.pub-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
}
.pub-item:last-child { border-bottom: none; }
.pub-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.1px;
  margin-bottom: 5px;
  line-height: 1.45;
}
.pub-title a { color: var(--text-primary); }
.pub-title a:hover { color: var(--tangerine); opacity: 1; }
.pub-authors {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 3px;
}
.pub-journal {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
}
.pub-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--tangerine-light);
  color: var(--tangerine-dark);
  margin-left: 6px;
  vertical-align: middle;
  font-style: normal;
}

/* ── Awards ──────────────────────────────────────────────── */
.award-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 20px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-light);
}
.award-item:last-child { border-bottom: none; }
.award-year {
  font-size: 13px;
  font-weight: 600;
  color: var(--tangerine);
  padding-top: 2px;
}
.award-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.2px;
  margin-bottom: 4px;
}
.award-org {
  font-size: 14px;
  color: var(--text-secondary);
}
.award-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.55;
}

/* ── Thoughts / Blog ─────────────────────────────────────── */
.thoughts-list { list-style: none; }
.thought-item {
  display: block;
  padding: 26px 0;
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition);
  cursor: pointer;
}
.thought-item:first-child { border-top: 1px solid var(--border-light); }
.thought-item:hover .thought-title { color: var(--tangerine); }
.thought-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.thought-date {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}
.thought-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--tangerine);
  background: var(--tangerine-light);
  padding: 2px 8px;
  border-radius: 4px;
}
.thought-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.4px;
  color: var(--text-primary);
  margin-bottom: 7px;
  line-height: 1.3;
  transition: color var(--transition);
}
.thought-excerpt {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 600px;
}

/* Thought post reader */
#post-reader { display: none; }
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 32px;
  cursor: pointer;
  transition: color var(--transition);
}
.post-back:hover { color: var(--tangerine); }
.post-content {
  max-width: 680px;
}
.post-content h1 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.8px;
  line-height: 1.15;
  margin-bottom: 12px;
}
.post-content .post-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 36px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}
.post-content h2 {
  font-size: 20px; font-weight: 650;
  letter-spacing: -0.3px;
  margin: 32px 0 10px;
  color: var(--text-primary);
}
.post-content h3 {
  font-size: 17px; font-weight: 600;
  margin: 24px 0 8px;
  color: var(--text-primary);
}
.post-content p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.post-content ul, .post-content ol {
  padding-left: 24px;
  margin-bottom: 18px;
}
.post-content li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.post-content blockquote {
  border-left: 3px solid var(--tangerine);
  padding: 4px 20px;
  margin: 24px 0;
  color: var(--text-secondary);
  font-style: italic;
}
.post-content code {
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--tangerine-dark);
}
.post-content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  overflow-x: auto;
  margin-bottom: 20px;
}
.post-content pre code {
  background: none; padding: 0; color: var(--text-primary);
}

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-light);
  padding: 36px 0;
  margin-top: 40px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--tangerine); opacity: 1; }

/* ── Utility ─────────────────────────────────────────────── */
.divider { height: 1px; background: var(--border-light); margin: 0; }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--tangerine); }
.mt-0 { margin-top: 0; }
.scholar-banner {
  background: var(--tangerine-light);
  border: 1px solid var(--tangerine-mid);
  border-radius: var(--radius);
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}
.scholar-banner p {
  font-size: 14px;
  color: var(--text-secondary);
}
.scholar-banner strong { color: var(--text-primary); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 700px) {
  :root { --max-width: 100%; }

  .nav-links { display: none; flex-direction: column; gap: 0;
    position: absolute; top: var(--nav-height); left: 0; right: 0;
    background: rgba(255,255,255,0.97);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 12px 24px; border-radius: 0; }
  .nav-toggle { display: flex; }

  .hero { padding: 48px 0 44px; }
  .hero-grid { grid-template-columns: 1fr; }
  .avatar { width: 88px; height: 88px; order: -1; }
  .avatar-initials { font-size: 28px; }
  .hero-name { font-size: 34px; }

  .page-header { padding: 40px 0 28px; }
  .page-header h1 { font-size: 28px; }

  .section { padding: 40px 0; }
  .section-title { font-size: 20px; }

  .award-item { grid-template-columns: 48px 1fr; gap: 14px; }
  .people-grid { grid-template-columns: 1fr 1fr; }
  .thought-title { font-size: 17px; }
  .post-content h1 { font-size: 26px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}