/* ═══════════════════════════════════════════════
   SHARED DESIGN SYSTEM
   Professional Gray Minimal Portfolio
   ═══════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@300;400;500;600&display=swap');

/* ── Tokens ────────────────────────────────── */
:root {
  --white:  #FFFFFF;
  --50:     #F8F8F7;
  --100:    #EFEFED;
  --200:    #DEDCD8;
  --300:    #C4C1BB;
  --400:    #9E9B95;
  --500:    #78756F;
  --700:    #3D3B37;
  --900:    #181715;

  --serif: 'Instrument Serif', Georgia, serif;
  --sans:  'Inter', system-ui, sans-serif;

  --max:   1040px;
  --px:    clamp(20px, 5vw, 72px);
  --ease:  cubic-bezier(.4,0,.2,1);
}

/* ── Reset ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--white);
  color: var(--900);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }

/* ── Editable ──────────────────────────────── */
[contenteditable] { cursor: text; }
[contenteditable]:focus {
  outline: 1.5px dashed var(--300);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Nav ───────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--px);
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--100);
}

.nav-logo {
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  color: var(--900);
  text-decoration: none;
  letter-spacing: -.01em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.nav-links li a {
  display: block;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--400);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 4px;
  transition: color .15s var(--ease), background .15s var(--ease);
  letter-spacing: .01em;
}
.nav-links li a:hover    { color: var(--900); background: var(--50); }
.nav-links li a.active   { color: var(--900); font-weight: 500; }

/* ── Wrap ──────────────────────────────────── */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--px);
}

/* ── Page header (reused across inner pages) ─ */
.page-header {
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--100);
}
.page-eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--400);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-eyebrow::before {
  content: '';
  display: inline-block;
  width: 18px; height: 1px;
  background: var(--300);
}
.page-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(38px, 6vw, 64px);
  letter-spacing: -.03em;
  line-height: 1.05;
  color: var(--900);
  margin-bottom: 18px;
}
.page-subtitle {
  font-size: 15px;
  font-weight: 300;
  color: var(--500);
  max-width: 520px;
  line-height: 1.8;
}

/* ── Section label ─────────────────────────── */
.sec-label {
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--400);
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--100);
}

/* ── Divider ───────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--100); }

/* ── Row entry (timeline/list style) ──────── */
.entry-list { display: flex; flex-direction: column; }
.entry {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px 40px;
  padding: 28px 0;
  border-top: 1px solid var(--100);
}
.entry:last-child { border-bottom: 1px solid var(--100); }
.entry-meta { padding-top: 2px; }
.entry-period {
  font-size: 12px;
  font-weight: 500;
  color: var(--400);
  margin-bottom: 4px;
  letter-spacing: .01em;
}
.entry-tag {
  display: inline-block;
  font-size: 10.5px;
  background: var(--50);
  border: 1px solid var(--200);
  color: var(--500);
  padding: 2px 8px;
  border-radius: 3px;
}
.entry-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--900);
  margin-bottom: 4px;
  line-height: 1.25;
}
.entry-org {
  font-size: 13px;
  font-weight: 500;
  color: var(--700);
  margin-bottom: 8px;
}
.entry-desc {
  font-size: 13.5px;
  font-weight: 300;
  color: var(--500);
  line-height: 1.75;
  max-width: 600px;
}
.entry-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.pill {
  font-size: 11px;
  font-weight: 400;
  color: var(--500);
  border: 1px solid var(--200);
  padding: 3px 10px;
  border-radius: 3px;
  background: var(--white);
}

/* ── Card grid ─────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--100);
  border: 1px solid var(--100);
}
.card {
  background: var(--white);
  padding: 28px 26px;
  transition: background .15s var(--ease);
}
.card:hover { background: var(--50); }
.card-label {
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--400);
  margin-bottom: 10px;
}
.card-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--900);
  margin-bottom: 8px;
  line-height: 1.3;
}
.card-body {
  font-size: 13px;
  font-weight: 300;
  color: var(--500);
  line-height: 1.7;
}
.card-footer {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--100);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-link {
  font-size: 12px;
  font-weight: 500;
  color: var(--900);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color .15s var(--ease);
}
.card-link:hover { color: var(--500); }
.card-link svg { transition: transform .15s var(--ease); }
.card-link:hover svg { transform: translate(2px,-2px); }
.card-year { font-size: 11px; color: var(--400); }

/* ── Cert card ─────────────────────────────── */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.cert-card {
  border: 1px solid var(--200);
  border-radius: 6px;
  padding: 22px 22px 18px;
  background: var(--white);
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.cert-card:hover {
  border-color: var(--400);
  box-shadow: 0 4px 20px rgba(0,0,0,.05);
}
.cert-issuer {
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--400);
  margin-bottom: 8px;
}
.cert-name {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--900);
  line-height: 1.4;
  margin-bottom: 6px;
}
.cert-date { font-size: 12px; color: var(--400); }
.cert-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 14px;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--700);
  text-decoration: none;
  transition: color .15s var(--ease);
}
.cert-link:hover { color: var(--900); }

/* ── Buttons ───────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 500;
  padding: 10px 22px;
  border-radius: 4px;
  text-decoration: none;
  transition: background .15s var(--ease), color .15s var(--ease), border-color .15s var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-dark  { background: var(--900); color: var(--white); }
.btn-dark:hover { background: var(--700); }
.btn-ghost { background: transparent; color: var(--900); border-color: var(--200); }
.btn-ghost:hover { border-color: var(--400); background: var(--50); }

/* ── Footer ────────────────────────────────── */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--100);
  padding: 20px var(--px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  background: var(--white);
}
.footer-copy {
  font-size: 11.5px;
  color: var(--400);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 11.5px;
  color: var(--400);
  text-decoration: none;
  transition: color .15s var(--ease);
}
.footer-links a:hover { color: var(--900); }

/* ── Responsive ────────────────────────────── */
@media (max-width: 680px) {
  .entry { grid-template-columns: 1fr; gap: 6px; }
  .entry-meta { display: flex; align-items: center; gap: 10px; }
}
@media (max-width: 500px) {
  .nav-links li:not(:last-child) { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}