:root {
  /* Palette: Mint (default) */
  --bg: #F1F8F1;
  --bg-soft: #E6F1E6;
  --paper: #FFFBEF;
  --paper-2: #FFF6E2;
  --ink: #23362C;
  --ink-soft: #4E6A5B;
  --ink-mute: #83998C;
  --mint: #7FC8A9;
  --mint-deep: #4F9E7E;
  --mint-ink: #2E6B52;
  --sand: #F4C95D;
  --sand-deep: #D9A441;
  --wood: #C79367;
  --wood-deep: #9E6B3D;
  --wood-dark: #6E4A2A;
  --rope: #B08768;
  --sky: #BEE3E1;
  --ocean: #5BA8C9;
  --coral: #E08B6E;
  --leaf: #6FB48A;
  --ai: #E8A26B;     /* AI — warm amber */
  --ds: #5BA8C9;     /* Data Science — ocean */
  --bc: #9C7BD1;     /* Blockchain — amethyst */
  --cl: #6FB48A;     /* Cloud — leaf */
  --shadow-soft: 0 10px 24px rgba(46,107,82,.08), 0 2px 6px rgba(46,107,82,.06);
  --shadow-card: 0 18px 40px rgba(46,107,82,.10), 0 4px 10px rgba(46,107,82,.06);
  --shadow-float: 0 28px 60px rgba(46,107,82,.14), 0 6px 14px rgba(46,107,82,.08);
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 30px;
  --r-pill: 999px;
  --density: 1; /* 1 = cozy, 1.2 = roomy */
  --font-head: 'Fraunces', 'Lora', Georgia, serif;
  --font-body: 'Nunito', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* Palette variants */
[data-palette="sand"] {
  --bg: #FBF4E6;
  --bg-soft: #F4E8CE;
  --paper: #FFFBEF;
  --paper-2: #FFF6E2;
  --ink: #3A2E1E;
  --ink-soft: #6E5A3A;
  --ink-mute: #9E8B6A;
  --mint: #E8C56A;
  --mint-deep: #C79040;
  --mint-ink: #7A4E1E;
}
[data-palette="ocean"] {
  --bg: #EEF6FA;
  --bg-soft: #DBEAF2;
  --paper: #FFFDF7;
  --ink: #1C3442;
  --ink-soft: #3E6277;
  --ink-mute: #7A95A6;
  --mint: #6FB7D3;
  --mint-deep: #3C7D9C;
  --mint-ink: #1E4A63;
}
[data-palette="forest"] {
  --bg: #EBF2E5;
  --bg-soft: #D6E3CA;
  --paper: #FCF7E8;
  --ink: #1F2E1F;
  --ink-soft: #405440;
  --ink-mute: #7A8A76;
  --mint: #6BA365;
  --mint-deep: #3F7038;
  --mint-ink: #254B22;
}

/* Dark / dusk island */
[data-mode="night"] {
  --bg: #18261E;
  --bg-soft: #223328;
  --paper: #2C3D33;
  --paper-2: #334A3C;
  --ink: #ECF5EC;
  --ink-soft: #BFD4C7;
  --ink-mute: #86A194;
  --mint: #6FB49A;
  --mint-deep: #9DD6BB;
  --mint-ink: #C7EED9;
  --sand: #E8C56A;
  --wood: #A67A53;
  --wood-deep: #8B6540;
  --wood-dark: #4E341E;
  --shadow-soft: 0 10px 24px rgba(0,0,0,.35), 0 2px 6px rgba(0,0,0,.2);
  --shadow-card: 0 18px 40px rgba(0,0,0,.45), 0 4px 10px rgba(0,0,0,.25);
  --shadow-float: 0 28px 60px rgba(0,0,0,.55), 0 6px 14px rgba(0,0,0,.3);
}

/* Font variants */
[data-font="rounded"] { --font-head: 'Fraunces', 'Lora', serif; --font-body: 'Nunito', system-ui, sans-serif; }
[data-font="warm"] { --font-head: 'Lora', Georgia, serif; --font-body: 'Nunito', system-ui, sans-serif; }
[data-font="clean"] { --font-head: 'Nunito', system-ui, sans-serif; --font-body: 'Nunito', system-ui, sans-serif; }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Island texture + circuit grid */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 12% -5%, color-mix(in oklab, var(--mint) 28%, transparent) 0%, transparent 60%),
    radial-gradient(700px 400px at 100% 8%, color-mix(in oklab, var(--sky) 35%, transparent) 0%, transparent 55%),
    radial-gradient(1000px 600px at 50% 120%, color-mix(in oklab, var(--mint) 22%, transparent) 0%, transparent 60%);
}
body::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: .5;
  background-image:
    linear-gradient(color-mix(in oklab, var(--mint-deep) 18%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in oklab, var(--mint-deep) 18%, transparent) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 70%);
}
[data-mode="night"] body::after { opacity: .35; }

.shell { position: relative; z-index: 1; }

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 700; letter-spacing: -0.01em; margin: 0; color: var(--ink); }
p { margin: 0; }

a { color: var(--mint-ink); text-decoration: none; }
a:hover { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 16px; z-index: 50;
  max-width: 1240px; margin: 16px auto 0;
  padding: 10px 14px 10px 18px;
  display: flex; align-items: center; gap: 18px;
  background: var(--paper);
  border-radius: var(--r-pill);
  box-shadow: var(--shadow-card);
  border: 1.5px solid color-mix(in oklab, var(--mint) 35%, transparent);
}
.nav-brand { display: flex; align-items: center; gap: 12px; font-family: var(--font-head); font-weight: 700; }
.nav-logo {
  width: 44px; height: 44px; border-radius: 14px;
  background: linear-gradient(160deg, var(--mint) 0%, var(--mint-deep) 100%);
  color: #fff; display: grid; place-items: center;
  font-weight: 800; letter-spacing: .02em;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,.12), 0 4px 10px rgba(46,107,82,.25);
  font-size: 15px;
}
.nav-brand-text { line-height: 1.1; }
.nav-brand-text .lab { font-size: 16px; color: var(--ink); }
.nav-brand-text .sub { font-size: 11px; color: var(--ink-mute); font-family: var(--font-body); font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.nav-links { margin-left: auto; display: flex; gap: 4px; }
.nav-link {
  padding: 8px 14px; border-radius: var(--r-pill);
  font-weight: 700; font-size: 14px; color: var(--ink-soft);
  transition: all .2s ease;
}
.nav-link:hover { background: var(--bg-soft); color: var(--ink); text-decoration: none; }
.nav-link.active { background: var(--mint); color: #fff; }
.nav-tools { display: flex; gap: 6px; align-items: center; margin-left: 8px; }
.nav-iconbtn {
  width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg-soft); color: var(--ink-soft);
  transition: all .2s ease;
}
.nav-iconbtn:hover { background: var(--mint); color: #fff; transform: rotate(-8deg); }

/* ---------- Layout ---------- */
.section {
  max-width: 1240px; margin: 0 auto;
  padding: calc(84px * var(--density)) 28px calc(36px * var(--density));
  position: relative;
}
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--paper); color: var(--mint-ink);
  font-weight: 700; font-size: 11.5px; letter-spacing: .18em; text-transform: uppercase;
  padding: 6px 14px; border-radius: var(--r-pill);
  border: 1.5px dashed color-mix(in oklab, var(--mint) 60%, transparent);
  font-family: var(--font-mono);
}
.section-eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--mint-deep);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--mint) 30%, transparent);
}
.section-title {
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.08;
  margin: 14px 0 10px;
  letter-spacing: -0.02em;
}
.section-sub { color: var(--ink-soft); font-size: 16px; max-width: 640px; }
.section-head { margin-bottom: calc(36px * var(--density)); }
.section-head .section-eyebrow { margin-bottom: 10px; }
.section-head .cli { margin-top: 6px; }

/* ---------- Hero ---------- */
.hero {
  padding-top: 56px; padding-bottom: 24px;
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 40px;
  align-items: center;
}
@media (max-width: 920px) { .hero { grid-template-columns: 1fr; } }

.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--paper); padding: 8px 14px 8px 8px;
  border-radius: var(--r-pill); box-shadow: var(--shadow-soft);
  font-weight: 700; font-size: 13px; color: var(--ink-soft);
  font-family: var(--font-mono); letter-spacing: .04em;
}
.hero-badge .dot {
  width: 22px; height: 22px; border-radius: 50%; background: var(--mint);
  display: grid; place-items: center; color: #fff; font-size: 12px;
  position: relative;
}
.hero-badge .dot::after {
  content: ""; position: absolute; inset: -4px; border-radius: 50%;
  border: 2px solid var(--mint); opacity: .5;
  animation: pulse 2s ease-out infinite;
}

/* Terminal-style tech meta chip */
.tech-chip {
  display: inline-flex; align-items: center; gap: 10px;
  background: color-mix(in oklab, var(--mint-ink) 92%, #000);
  color: color-mix(in oklab, var(--mint) 60%, #fff);
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 6px 12px; border-radius: 8px;
  font-weight: 600;
  border: 1.5px solid color-mix(in oklab, var(--mint) 40%, transparent);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--mint) 20%, transparent), 0 6px 14px rgba(46,107,82,.15);
}
.tech-chip .led { width: 8px; height: 8px; border-radius: 50%; background: #7FE6B2; box-shadow: 0 0 6px #7FE6B2; animation: blink 1.6s ease-in-out infinite; }
@keyframes blink { 0%,100% { opacity:1;} 50% { opacity:.4;} }

/* Hero data readout */
.hero-readout {
  margin-top: 20px; padding: 14px 16px;
  background: var(--paper);
  border-radius: var(--r-md);
  border: 1.5px solid color-mix(in oklab, var(--mint) 35%, transparent);
  font-family: var(--font-mono); font-size: 12px;
  color: var(--ink-soft); line-height: 1.8;
  box-shadow: var(--shadow-soft);
  max-width: 560px;
  position: relative; overflow: hidden;
}
.hero-readout::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--ai), var(--ds), var(--bc), var(--cl));
}
.hero-readout b { color: var(--mint-ink); font-weight: 700; }
.hero-readout .blink { color: var(--mint-deep); animation: blink 1s step-end infinite; }
.hero h1 {
  font-size: clamp(40px, 6.2vw, 80px);
  line-height: 0.98;
  margin: 22px 0 18px;
  letter-spacing: -0.03em;
}
.hero h1 em { font-style: italic; color: var(--mint-deep); font-family: var(--font-head); }
.hero-tag { font-size: 18px; color: var(--ink-soft); max-width: 560px; }
.hero-ctas { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: var(--r-pill); font-weight: 800;
  font-size: 15px; transition: transform .2s ease, box-shadow .2s ease;
  box-shadow: 0 6px 0 rgba(0,0,0,.06);
}
.btn-primary { background: var(--mint); color: #fff; box-shadow: inset 0 -4px 0 rgba(0,0,0,.12), var(--shadow-soft); }
.btn-primary:hover { transform: translateY(-2px); text-decoration: none; }
.btn-ghost { background: var(--paper); color: var(--ink); box-shadow: var(--shadow-soft); }
.btn-ghost:hover { transform: translateY(-2px); text-decoration: none; }

.hero-stats { display: flex; gap: 28px; margin-top: 36px; flex-wrap: wrap; }
.hero-stat { }
.hero-stat .n { font-family: var(--font-head); font-weight: 700; font-size: 32px; color: var(--mint-deep); line-height: 1; }
.hero-stat .l { color: var(--ink-mute); font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; margin-top: 6px; }

.hero-art { position: relative; aspect-ratio: 1 / 1; }

/* ---------- Signboards ---------- */
/* Primary: wooden plank signpost */
.signboard-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
@media (max-width: 760px) { .signboard-grid { grid-template-columns: 1fr; } }

.signboard {
  position: relative;
  padding: 34px 30px 30px;
  border-radius: var(--r-lg);
  background: var(--paper);
  box-shadow: var(--shadow-card);
  transition: transform .35s cubic-bezier(.2,.9,.3,1.3), box-shadow .3s ease;
  transform-origin: 50% 100%;
  overflow: hidden;
}
.signboard::before {
  content: ""; position: absolute; left: 50%; top: -14px; transform: translateX(-50%);
  width: 78px; height: 18px; border-radius: 0 0 12px 12px;
  background: linear-gradient(180deg, var(--wood-deep), var(--wood));
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.2);
  z-index: 2;
}
.signboard::after {
  content: ""; position: absolute; left: 50%; top: -6px; transform: translateX(-50%);
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--wood-dark); box-shadow: inset 0 -2px 0 rgba(255,255,255,.2);
  z-index: 3;
}
/* Circuit trace behind signboard content */
.signboard .circuit {
  position: absolute; inset: 0; pointer-events: none;
  opacity: .08; z-index: 0;
}
.signboard > * { position: relative; z-index: 1; }
.signboard.reveal:hover { transform: rotate(-1.2deg) translateY(-4px); box-shadow: var(--shadow-float); }
.signboard.reveal:nth-child(even):hover { transform: rotate(1.2deg) translateY(-4px); }
.signboard.reveal:hover .circuit { opacity: .18; }

.signboard-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.signboard-glyph {
  width: 54px; height: 54px; border-radius: 16px;
  display: grid; place-items: center; color: #fff;
  font-size: 28px; font-weight: 800;
  box-shadow: inset 0 -4px 0 rgba(0,0,0,.18), 0 0 0 4px color-mix(in oklab, var(--mint) 16%, transparent);
  flex-shrink: 0;
  position: relative;
}
.signboard-glyph::after {
  content: ""; position: absolute; inset: -8px; border-radius: 22px;
  border: 1.5px dashed currentColor; opacity: .4;
  animation: spin 18s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.signboard[data-area="ai"] .signboard-glyph::after { color: var(--ai); }
.signboard[data-area="ds"] .signboard-glyph::after { color: var(--ds); }
.signboard[data-area="bc"] .signboard-glyph::after { color: var(--bc); }
.signboard[data-area="cl"] .signboard-glyph::after { color: var(--cl); }
.signboard[data-area="ai"] .signboard-glyph { background: var(--ai); }
.signboard[data-area="ds"] .signboard-glyph { background: var(--ds); }
.signboard[data-area="bc"] .signboard-glyph { background: var(--bc); }
.signboard[data-area="cl"] .signboard-glyph { background: var(--cl); }
.signboard-id { font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-mute); letter-spacing: .22em; }
.signboard-id::before { content: "// "; color: color-mix(in oklab, var(--mint) 70%, var(--ink-mute)); }
.signboard-name { font-family: var(--font-head); font-weight: 700; font-size: 24px; line-height: 1.1; color: var(--ink); margin-top: 4px; }
.signboard-desc { color: var(--ink-soft); font-size: 15px; line-height: 1.55; margin: 10px 0 16px; }
.signboard-topics { display: flex; flex-wrap: wrap; gap: 8px; }
.topic-chip {
  padding: 5px 11px; border-radius: 8px;
  background: var(--bg-soft); color: var(--ink-soft);
  font-weight: 700; font-size: 11.5px;
  font-family: var(--font-mono);
  letter-spacing: .02em;
  border: 1px solid transparent;
}
.topic-chip::before { content: "◦ "; opacity: .6; }
.signboard[data-area="ai"] .topic-chip { background: color-mix(in oklab, var(--ai) 18%, var(--paper)); color: color-mix(in oklab, var(--ai) 80%, var(--ink)); }
.signboard[data-area="ds"] .topic-chip { background: color-mix(in oklab, var(--ds) 18%, var(--paper)); color: color-mix(in oklab, var(--ds) 80%, var(--ink)); }
.signboard[data-area="bc"] .topic-chip { background: color-mix(in oklab, var(--bc) 18%, var(--paper)); color: color-mix(in oklab, var(--bc) 80%, var(--ink)); }
.signboard[data-area="cl"] .topic-chip { background: color-mix(in oklab, var(--cl) 18%, var(--paper)); color: color-mix(in oklab, var(--cl) 80%, var(--ink)); }

/* Signboard variant styles */
[data-sign="plank"] .signboard {
  background: linear-gradient(180deg, var(--paper-2), color-mix(in oklab, var(--wood) 10%, var(--paper-2)));
  border: 2px solid color-mix(in oklab, var(--wood) 35%, transparent);
}
[data-sign="plank"] .signboard::before { background: linear-gradient(180deg, var(--wood-deep), var(--wood)); }

[data-sign="mint"] .signboard {
  background: var(--paper);
  border: 2.5px solid var(--mint);
}
[data-sign="mint"] .signboard::before { background: linear-gradient(180deg, var(--mint-deep), var(--mint)); }
[data-sign="mint"] .signboard::after { background: var(--mint-deep); }

[data-sign="parchment"] .signboard {
  background: linear-gradient(180deg, #FFF8E1, #FAE9C6);
  border: none;
  box-shadow: 0 10px 22px rgba(180,130,50,.16), 0 2px 4px rgba(180,130,50,.1), inset 0 0 0 1.5px rgba(150,110,60,.2);
}
[data-sign="parchment"] .signboard::before { display: none; }
[data-sign="parchment"] .signboard::after {
  content: ""; width: 14px; height: 14px; top: 10px; left: 14px; transform: none;
  background: radial-gradient(circle at 30% 30%, rgba(0,0,0,.35), rgba(0,0,0,.1));
}

[data-sign="outline"] .signboard {
  background: var(--paper);
  border: 2.5px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
}
[data-sign="outline"] .signboard:hover { transform: translate(-2px,-2px) rotate(-.8deg); box-shadow: 10px 10px 0 var(--ink); }
[data-sign="outline"] .signboard::before, [data-sign="outline"] .signboard::after { display: none; }

/* ---------- Wooden member board ---------- */
.people-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.member {
  background: var(--paper);
  border-radius: var(--r-lg);
  padding: 22px 20px 20px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform .3s cubic-bezier(.2,.9,.3,1.3);
  border: 1.5px solid color-mix(in oklab, var(--mint) 15%, transparent);
}
.member.reveal:hover { transform: translateY(-4px) rotate(-.5deg); }
.member.reveal:nth-child(3n):hover { transform: translateY(-4px) rotate(.6deg); }
.member-photo {
  width: 100%; aspect-ratio: 1; border-radius: var(--r-md);
  overflow: hidden; position: relative;
  display: grid; place-items: center;
}
.member-photo svg { width: 82%; height: 82%; }
.member-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.member-role {
  position: absolute; top: -10px; right: 14px;
  background: var(--mint); color: #fff;
  padding: 5px 12px; border-radius: var(--r-pill);
  font-weight: 800; font-size: 11px; letter-spacing: .08em;
  box-shadow: var(--shadow-soft);
}
.member[data-role="PI"] .member-role { background: var(--wood-deep); }
.member[data-role="Staff"] .member-role { background: var(--sand-deep); }
.member[data-role="PhD"] .member-role { background: var(--bc); }
.member[data-role="MS"] .member-role { background: var(--ocean); }

.member-name { font-family: var(--font-head); font-weight: 700; font-size: 18px; margin-top: 14px; line-height: 1.2; }
.member-title { color: var(--ink-soft); font-size: 13px; font-weight: 600; margin-top: 4px; line-height: 1.4; }
.member-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.member-tag { background: var(--bg-soft); color: var(--ink-soft); font-size: 11px; font-weight: 700; padding: 4px 9px; border-radius: var(--r-pill); }
.member-area-bar {
  height: 5px; border-radius: 3px; margin-top: 14px;
  background: var(--mint);
}
.member[data-area="ai"] .member-area-bar { background: var(--ai); }
.member[data-area="ds"] .member-area-bar { background: var(--ds); }
.member[data-area="bc"] .member-area-bar { background: var(--bc); }
.member[data-area="cl"] .member-area-bar { background: var(--cl); }

.member-name a {
  color: inherit; text-decoration: none;
  background-image: linear-gradient(var(--mint-deep), var(--mint-deep));
  background-size: 0 1.5px; background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size .25s ease, color .2s ease;
}
.member-name a:hover {
  color: var(--mint-deep);
  background-size: 100% 1.5px;
}

.member-link {
  position: absolute; bottom: 14px; right: 14px;
  width: 34px; height: 34px; border-radius: 50%;
  background: color-mix(in oklab, var(--mint) 18%, var(--paper));
  color: var(--mint-deep);
  display: grid; place-items: center;
  border: 1.5px solid color-mix(in oklab, var(--mint) 35%, transparent);
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
  transition: all .2s ease;
}
.member-link:hover { background: var(--mint); color: #fff; transform: rotate(20deg); }

/* ---------- Alumni ---------- */
.alumni-wrap {
  display: grid; grid-template-columns: 1fr 2fr; gap: 24px;
  margin-top: 32px;
}
@media (max-width: 760px) { .alumni-wrap { grid-template-columns: 1fr; } }
.alumni-card {
  background: var(--paper);
  border-radius: var(--r-lg);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  border: 1.5px dashed color-mix(in oklab, var(--mint) 40%, transparent);
}
.alumni-card h4 { font-size: 20px; margin-bottom: 14px; color: var(--mint-ink); }
.alumni-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.alumni-list li { display: flex; gap: 10px; font-size: 14px; padding: 8px 10px; border-radius: 10px; transition: background .2s ease; align-items: baseline; }
.alumni-list li:hover { background: var(--bg-soft); }
.alumni-list .nm { font-weight: 700; color: var(--ink); }
.alumni-list .pos { color: var(--ink-soft); }
.alumni-list .yr { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); margin-left: auto; }
[data-alumni="other"] .alumni-list { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); display: grid; }

/* ---------- Papers bulletin board ---------- */
.board {
  background:
    repeating-linear-gradient(45deg, color-mix(in oklab, var(--wood) 12%, var(--paper-2)) 0 4px, color-mix(in oklab, var(--wood) 18%, var(--paper-2)) 4px 8px);
  padding: calc(28px * var(--density)) calc(26px * var(--density));
  border-radius: var(--r-xl);
  border: 10px solid var(--wood);
  box-shadow: inset 0 0 0 2px var(--wood-dark), var(--shadow-card);
  position: relative;
}
.board::before, .board::after {
  content: ""; position: absolute; width: 18px; height: 18px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff8, transparent 50%), var(--wood-dark);
  top: -6px;
}
.board::before { left: -6px; }
.board::after { right: -6px; }

.paper-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.paper-filter button {
  padding: 8px 14px; border-radius: var(--r-pill);
  background: var(--paper); color: var(--ink-soft);
  font-weight: 700; font-size: 13px;
  border: 2px solid transparent;
  transition: all .2s ease;
}
.paper-filter button.active { background: var(--mint); color: #fff; border-color: var(--mint-deep); }
.paper-filter button:not(.active):hover { border-color: color-mix(in oklab, var(--mint) 40%, transparent); }

.papers {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.paper {
  background: var(--paper);
  border-radius: 6px;
  padding: 22px 18px 18px;
  box-shadow: 0 8px 16px rgba(46,60,50,.12), 0 2px 4px rgba(46,60,50,.08);
  position: relative;
  font-family: var(--font-body);
  transform-origin: 50% 0;
  transition: transform .3s cubic-bezier(.2,.9,.3,1.3), box-shadow .3s ease;
}
.paper:nth-child(3n+1) { background: #FFF6D8; transform: rotate(-1.2deg); }
.paper:nth-child(3n+2) { background: #E3F3E5; transform: rotate(.9deg); }
.paper:nth-child(3n+3) { background: #FFE8D1; transform: rotate(-.5deg); }
.paper:hover { transform: rotate(0) translateY(-4px); box-shadow: 0 16px 28px rgba(46,60,50,.2); z-index: 2; }

.paper-pin {
  position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 20px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff8, transparent 45%), #D1484E;
  box-shadow: 0 3px 6px rgba(0,0,0,.25), inset 0 -2px 0 rgba(0,0,0,.2);
}
.paper:nth-child(3n+2) .paper-pin { background: radial-gradient(circle at 35% 30%, #fff8, transparent 45%), #4B8FB2; }
.paper:nth-child(3n+3) .paper-pin { background: radial-gradient(circle at 35% 30%, #fff8, transparent 45%), #6BA865; }

.paper.is-new .paper-pin::after {
  content: ""; position: absolute; inset: -6px; border-radius: 50%;
  border: 2px solid currentColor; color: #D1484E;
  animation: pulse 1.8s ease-out infinite;
}
.paper:nth-child(3n+2).is-new .paper-pin::after { color: #4B8FB2; }
.paper:nth-child(3n+3).is-new .paper-pin::after { color: #6BA865; }
@keyframes pulse { 0% { transform: scale(.8); opacity: .9; } 100% { transform: scale(1.8); opacity: 0; } }

.paper-meta { display: flex; gap: 8px; align-items: center; font-size: 11px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-mute); }
.paper-year { font-family: var(--font-mono); background: rgba(0,0,0,.08); padding: 2px 8px; border-radius: 6px; }
.paper-id { font-family: var(--font-mono); font-size: 10px; color: var(--ink-mute); letter-spacing: .1em; margin-left: auto; opacity: .7; }
.paper-area-dot { width: 8px; height: 8px; border-radius: 50%; }
.paper[data-area="ai"] .paper-area-dot { background: var(--ai); }
.paper[data-area="ds"] .paper-area-dot { background: var(--ds); }
.paper[data-area="bc"] .paper-area-dot { background: var(--bc); }
.paper[data-area="cl"] .paper-area-dot { background: var(--cl); }
.paper h4 { font-family: var(--font-head); font-weight: 700; font-size: 16px; line-height: 1.25; margin: 10px 0 8px; color: var(--ink); }
.paper-authors { font-size: 12.5px; color: var(--ink-soft); line-height: 1.5; }
.paper-tags { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.paper-tag { font-size: 10.5px; font-weight: 800; padding: 3px 8px; border-radius: var(--r-pill); background: rgba(0,0,0,.08); color: var(--ink); }
.paper-venue { font-family: var(--font-head); font-style: italic; font-weight: 600; color: var(--mint-ink); font-size: 13px; margin-top: 4px; }

/* ---------- Projects ---------- */
.projects {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.project {
  background: var(--paper);
  border-radius: var(--r-lg);
  padding: 26px 24px 22px;
  box-shadow: var(--shadow-card);
  position: relative;
  border-left: 6px solid var(--mint);
  transition: transform .25s ease, box-shadow .25s ease;
}
.project[data-area="ai"] { border-left-color: var(--ai); }
.project[data-area="ds"] { border-left-color: var(--ds); }
.project[data-area="bc"] { border-left-color: var(--bc); }
.project[data-area="cl"] { border-left-color: var(--cl); }
.project.reveal:hover { transform: translateY(-3px); box-shadow: var(--shadow-float); }

.project-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.project-eyebrow { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .14em; text-transform: uppercase; font-weight: 700; }
.project-status {
  font-size: 10.5px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  padding: 5px 10px; border-radius: var(--r-pill);
}
.project-status[data-status="active"] { background: color-mix(in oklab, var(--mint) 25%, var(--paper)); color: var(--mint-ink); }
.project-status[data-status="done"] { background: var(--bg-soft); color: var(--ink-mute); }
.project h4 { font-size: 20px; margin: 6px 0 8px; line-height: 1.2; }
.project-desc { color: var(--ink-soft); font-size: 14px; line-height: 1.55; }
.project-collab { font-size: 12.5px; color: var(--ink-soft); margin-top: 12px; }
.project-collab b { color: var(--mint-ink); }
.project-progress {
  margin-top: 16px; display: flex; align-items: center; gap: 10px;
  font-size: 12px; color: var(--ink-mute); font-weight: 700;
}
.project-progress .bar { flex: 1; height: 8px; background: var(--bg-soft); border-radius: 4px; overflow: hidden; }
.project-progress .bar span { display: block; height: 100%; border-radius: 4px; background: var(--mint); transition: width 1s cubic-bezier(.2,.9,.3,1); }
.project[data-area="ai"] .project-progress .bar span { background: var(--ai); }
.project[data-area="ds"] .project-progress .bar span { background: var(--ds); }
.project[data-area="bc"] .project-progress .bar span { background: var(--bc); }
.project[data-area="cl"] .project-progress .bar span { background: var(--cl); }
.project-span { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); margin-top: 6px; letter-spacing: .08em; }

/* ---------- Contact postcard ---------- */
.postcard-wrap {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px;
  align-items: start;
}
@media (max-width: 820px) { .postcard-wrap { grid-template-columns: 1fr; } }

.postcard {
  background: var(--paper);
  border-radius: var(--r-lg);
  padding: 0;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  position: relative;
  border: 2px solid color-mix(in oklab, var(--mint) 30%, transparent);
}
.postcard-stamp {
  position: absolute; top: 16px; right: 16px;
  width: 74px; height: 92px;
  background: var(--paper-2);
  border: 2px dashed var(--wood-deep);
  border-radius: 6px;
  display: grid; place-items: center;
  font-family: var(--font-head); font-weight: 700; color: var(--wood-deep); font-size: 11px;
  text-align: center; line-height: 1.1; padding: 6px;
  transform: rotate(4deg);
}
.postcard-stamp .big { font-size: 22px; line-height: 1; display: block; }
.postcard-body { padding: 28px; }
.postcard-title { font-size: 22px; margin-bottom: 6px; }
.postcard-sub { color: var(--ink-soft); font-size: 14px; margin-bottom: 18px; }
.field { display: block; margin-bottom: 14px; }
.field label { font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-mute); display: block; margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; padding: 12px 14px; font: inherit; color: var(--ink);
  background: var(--bg-soft); border: 2px solid transparent; border-radius: var(--r-md);
  transition: all .2s ease;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--mint); background: var(--paper-2); }
.field textarea { resize: vertical; min-height: 90px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-submit { margin-top: 6px; }
.form-success { color: var(--mint-ink); font-weight: 700; font-size: 14px; margin-top: 10px; }

.tpl-picker {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
@media (max-width: 620px) { .tpl-picker { grid-template-columns: 1fr; } }
.tpl-chip {
  text-align: left;
  padding: 10px 12px;
  border-radius: var(--r-md);
  background: var(--bg-soft);
  border: 2px solid transparent;
  cursor: pointer;
  font: inherit; color: var(--ink);
  transition: all .2s ease;
  display: flex; flex-direction: column; gap: 2px;
}
.tpl-chip b { font-size: 13.5px; font-weight: 800; }
.tpl-chip small { font-size: 11.5px; color: var(--ink-mute); font-weight: 600; }
.tpl-chip:hover { background: var(--paper-2); border-color: color-mix(in oklab, var(--mint) 40%, transparent); }
.tpl-chip.on {
  background: color-mix(in oklab, var(--mint) 22%, var(--paper));
  border-color: var(--mint-deep);
}
.tpl-chip.on b { color: var(--mint-deep); }

.tpl-preview {
  background: var(--paper-2);
  border: 1.5px dashed color-mix(in oklab, var(--mint-deep) 35%, transparent);
  border-radius: var(--r-md);
  padding: 14px 16px;
  margin-bottom: 14px;
}
.tpl-head { display: grid; gap: 4px; font-size: 13px; margin-bottom: 10px; }
.tpl-head .tpl-k {
  display: inline-block; min-width: 62px;
  font-size: 10.5px; font-weight: 800; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-mute);
}
.tpl-head code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink);
  background: transparent;
}
.tpl-body {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  white-space: pre-wrap;
  margin: 0;
  padding-top: 8px;
  border-top: 1px dashed color-mix(in oklab, var(--mint-deep) 25%, transparent);
  max-height: 180px;
  overflow-y: auto;
}

.mailbox {
  background: var(--paper);
  border-radius: var(--r-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border: 1.5px solid color-mix(in oklab, var(--mint) 20%, transparent);
}
.mailbox h4 { font-size: 18px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.mailbox address { font-style: normal; color: var(--ink-soft); font-size: 14px; white-space: pre-line; line-height: 1.7; }
.mailbox-row { display: flex; gap: 10px; align-items: center; font-size: 14px; padding: 10px 0; border-top: 1.5px dashed color-mix(in oklab, var(--mint) 30%, transparent); color: var(--ink-soft); }
.mailbox-row .lbl { font-weight: 800; color: var(--ink); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; min-width: 60px; }
.socials { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.social {
  padding: 9px 14px; border-radius: var(--r-pill);
  background: var(--bg-soft); color: var(--ink-soft);
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-weight: 700; font-size: 12px;
  letter-spacing: .04em;
  border: 1.5px solid transparent;
  transition: all .2s ease;
}
.social::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--mint-deep);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--mint) 30%, transparent);
}
.social:hover { background: var(--mint); color: #fff; text-decoration: none; transform: translateY(-3px); border-color: var(--mint-deep); }
.social:hover::before { background: #fff; box-shadow: 0 0 0 2px rgba(255,255,255,.4); }

/* ---------- Island SVG art ---------- */
.island-art {
  width: 100%; height: 100%; display: block;
  filter: drop-shadow(0 18px 24px rgba(46,107,82,.18));
}
.island-art .cloud { animation: drift 16s ease-in-out infinite; transform-origin: center; }
.island-art .cloud-2 { animation-delay: -8s; animation-duration: 20s; }
@keyframes drift { 0%,100% { transform: translateX(0); } 50% { transform: translateX(12px); } }

.float { animation: float 4.5s ease-in-out infinite; transform-origin: center; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

/* Footer */
.footer {
  max-width: 1240px; margin: 40px auto 24px; padding: 28px;
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
  color: var(--ink-mute); font-size: 13px;
  border-top: 2px dashed color-mix(in oklab, var(--mint) 40%, transparent);
}
.footer b { color: var(--ink-soft); }

/* ---------- Tweaks ---------- */
.tweaks {
  position: fixed; right: 18px; bottom: 18px; z-index: 80;
  background: var(--paper); border-radius: var(--r-lg);
  padding: 18px 18px 16px; width: 280px;
  box-shadow: var(--shadow-float);
  border: 2px solid color-mix(in oklab, var(--mint) 35%, transparent);
  transform-origin: bottom right;
  transition: all .3s cubic-bezier(.2,.9,.3,1.2);
}
.tweaks h5 { font-size: 15px; font-family: var(--font-head); display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.tweaks h5 .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px color-mix(in oklab, var(--mint) 25%, transparent); }
.tweaks .group { margin-top: 14px; }
.tweaks .group-label { font-size: 10.5px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 8px; }
.tweaks .row { display: flex; gap: 6px; flex-wrap: wrap; }
.tweaks button.swatch {
  padding: 6px 10px; border-radius: var(--r-pill); font-weight: 700; font-size: 12px;
  background: var(--bg-soft); color: var(--ink-soft);
  border: 2px solid transparent;
  transition: all .15s ease;
}
.tweaks button.swatch.on { background: var(--mint); color: #fff; border-color: var(--mint-deep); }
.tweaks button.swatch:hover:not(.on) { border-color: color-mix(in oklab, var(--mint) 40%, transparent); }
.tweaks-close { position: absolute; top: 10px; right: 10px; color: var(--ink-mute); font-size: 18px; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; }
.tweaks-close:hover { background: var(--bg-soft); color: var(--ink); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .7s cubic-bezier(.2,.9,.3,1.1); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* CLI command bar */
.cli {
  display: inline-flex; align-items: stretch;
  background: color-mix(in oklab, var(--mint-ink) 94%, #000);
  color: color-mix(in oklab, var(--mint) 50%, #F4FFF7);
  font-family: var(--font-mono); font-size: 12.5px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(46,107,82,.18), inset 0 0 0 1.5px color-mix(in oklab, var(--mint) 40%, transparent);
  margin-bottom: 14px;
  max-width: 100%;
}
[data-mode="night"] .cli {
  background: #0E1A14;
  box-shadow: 0 10px 24px rgba(0,0,0,.45), inset 0 0 0 1.5px color-mix(in oklab, var(--mint) 45%, transparent);
}
.cli-chrome {
  display: flex; gap: 5px; align-items: center;
  padding: 0 10px;
  background: rgba(0,0,0,.18);
}
.cli-chrome .dot { width: 9px; height: 9px; border-radius: 50%; }
.cli-chrome .dot.r { background: #E06B5C; }
.cli-chrome .dot.y { background: #E8BE5C; }
.cli-chrome .dot.g { background: #7FE6B2; }
.cli-prompt {
  padding: 8px 14px;
  display: flex; align-items: center; gap: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cli-user { color: #7FE6B2; font-weight: 700; }
.cli-at { color: color-mix(in oklab, var(--mint) 40%, #8FA69A); }
.cli-host { color: #C9E8DC; font-weight: 600; }
.cli-path { color: #E8BE5C; }
.cli-sep { color: color-mix(in oklab, var(--mint) 30%, #8FA69A); margin: 0 2px; }
.cli-cmd { color: #F4FFF7; }
.cli-flag { color: #C8A8E8; }
.cli-cursor {
  display: inline-block; width: 8px; height: 14px;
  background: #7FE6B2;
  margin-left: 2px;
  animation: blink 1s step-end infinite;
  vertical-align: -2px;
}
@media (max-width: 640px) {
  .cli-prompt { font-size: 11px; padding: 8px 10px; }
  .cli-host, .cli-at { display: none; }
}

/* Decorative leaves */
.leaf-deco {
  position: absolute; pointer-events: none; opacity: .6;
}
.leaf-deco.tl { top: 20px; left: 10px; transform: rotate(-12deg); }
.leaf-deco.br { bottom: 20px; right: 20px; transform: rotate(140deg); }