/* ============================================================
   José Luis Salmerón — Academic site
   ============================================================ */

:root {
  --bg:            #070a14;
  --bg-soft:       #0d1222;
  --surface:       rgba(255, 255, 255, 0.035);
  --card-bg:       #10131c;
  --surface-2:     rgba(255, 255, 255, 0.06);
  --border:        rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text:          #eef1f8;
  --text-soft:     #aab2c7;
  --text-mute:     #6f7896;
  --accent:        #8a9bff;
  --accent-2:      #d6a05c;
  --accent-3:      #e6c069;
  --grad: linear-gradient(120deg, #8a9bff 0%, #e6c069 110%);
  --shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6);
  --radius: 18px;
  --maxw: 1180px;
  --font-display: 'Sora', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

html[data-theme="light"] {
  --bg:            #fbfcfe;
  --bg-soft:       #ffffff;
  --surface:       rgba(20, 30, 70, 0.035);
  --card-bg:       #f3f4f8;
  --surface-2:     rgba(20, 30, 70, 0.06);
  --border:        rgba(20, 30, 70, 0.1);
  --border-strong: rgba(20, 30, 70, 0.18);
  --text:          #131829;
  --text-soft:     #3f4861;
  --text-mute:     #6b7390;
  --accent:        #2e3e93;
  --accent-2:      #9c5a23;
  --accent-3:      #b5831c;
  --grad: linear-gradient(120deg, #2e3e93 0%, #be8c24 115%);
  --shadow: 0 24px 60px -28px rgba(40, 50, 90, 0.3);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

::selection { background: var(--accent-2); color: #fff; }

/* ---------- Background decoration ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  opacity: 0.5;
}
.bg-glow {
  position: fixed; z-index: -1; border-radius: 50%;
  filter: blur(110px); opacity: 0.5; pointer-events: none;
}
.bg-glow--1 {
  width: 620px; height: 620px; top: -180px; right: -120px;
  background: radial-gradient(circle, var(--accent-3), transparent 65%);
}
.bg-glow--2 {
  width: 560px; height: 560px; top: 420px; left: -180px;
  background: radial-gradient(circle, var(--accent), transparent 65%);
}
/* Light theme: clean, near-white background — soft cool tints only, no violet wash */
html[data-theme="light"] .bg-glow--1 {
  background: radial-gradient(circle, var(--accent), transparent 65%);
  opacity: 0.1;
}
html[data-theme="light"] .bg-glow--2 {
  background: radial-gradient(circle, var(--accent-3), transparent 65%);
  opacity: 0.08;
}
html[data-theme="light"] .bg-grid { opacity: 0.6; }

/* ---------- Navigation ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--border);
}
.nav__inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
}
.nav__brand { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.nav__brand-mark {
  font-family: var(--font-display); font-weight: 800; font-size: 0.85rem;
  letter-spacing: 0.5px; color: #fff;
  background: var(--grad); padding: 8px 10px; border-radius: 10px; line-height: 1;
}
.nav__brand-text { font-family: var(--font-display); font-size: 1rem; }
.nav__links { display: flex; gap: 26px; }
.nav__links a {
  font-size: 0.92rem; color: var(--text-soft); font-weight: 500;
  position: relative; transition: color 0.2s;
}
.nav__links a::after {
  content: ''; position: absolute; left: 0; bottom: -5px; height: 2px; width: 0;
  background: var(--grad); border-radius: 2px; transition: width 0.25s ease;
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { width: 100%; }
.nav__actions { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  display: grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--border); border-radius: 11px;
  background: var(--surface); color: var(--text-soft); cursor: pointer;
  transition: all 0.2s ease;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface-2); }
.icon-btn--menu { display: none; }
.icon-sun { display: none; }
html[data-theme="light"] .icon-sun { display: block; }
html[data-theme="light"] .icon-moon { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 24px; border-radius: 12px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  cursor: pointer; transition: transform 0.18s ease, box-shadow 0.25s ease, background 0.25s;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--grad); color: #fff;
  box-shadow: 0 10px 30px -10px var(--accent);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 38px -10px var(--accent-2); }
.btn--ghost {
  background: var(--surface); color: var(--text); border-color: var(--border-strong);
}
.btn--ghost:hover { transform: translateY(-2px); background: var(--surface-2); }

/* ---------- Layout / sections ---------- */
.section {
  max-width: var(--maxw); margin: 0 auto; padding: 96px 24px;
}
.section__head { margin-bottom: 48px; max-width: 720px; }
.section__kicker {
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 1px;
  color: var(--accent); text-transform: uppercase; display: block; margin-bottom: 14px;
}
.section__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.7rem); line-height: 1.12; letter-spacing: -0.02em;
}
.section__sub { color: var(--text-soft); margin-top: 14px; font-size: 1.05rem; }
.section__sub a { color: var(--accent); font-weight: 600; }
.section__sub a:hover { text-decoration: underline; }

.grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- Hero ---------- */
.hero {
  max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: 1.25fr 0.9fr; gap: 56px; align-items: center;
  padding: 160px 24px 70px;
}
.hero__eyebrow {
  font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 2px;
  text-transform: uppercase; color: var(--accent-3); margin-bottom: 18px;
}
.hero__title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2.8rem, 7vw, 5rem); line-height: 0.98; letter-spacing: -0.03em;
}
.hero__role {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.05rem, 2.2vw, 1.35rem); margin-top: 22px; color: var(--text);
}
.hero__lede {
  color: var(--text-soft); font-size: 1.08rem; margin-top: 18px; max-width: 560px;
}
.hero__lede strong { color: var(--text); font-weight: 600; }
.hero__note {
  margin-top: 18px; font-size: 0.92rem; color: var(--text-mute);
  display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 10px 16px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--border);
}
.hero__note a { color: var(--accent); font-weight: 600; }
.hero__note a:hover { text-decoration: underline; }
.hero__actions { display: flex; align-items: center; gap: 18px; margin-top: 34px; flex-wrap: wrap; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__social { display: flex; gap: 12px; }
.hero__social a {
  display: grid; place-items: center; width: 44px; height: 44px;
  border: 1px solid var(--border); border-radius: 12px; color: var(--text-soft);
  background: var(--surface); transition: all 0.2s ease;
}
.hero__social a:hover {
  color: #fff; border-color: transparent; background: var(--grad);
  transform: translateY(-3px);
}

.hero__portrait { display: flex; justify-content: center; }
.portrait-frame {
  position: relative; border-radius: 26px; padding: 8px;
  background: linear-gradient(145deg, var(--border-strong), transparent);
  box-shadow: var(--shadow);
}
.portrait-frame::before {
  content: ''; position: absolute; inset: -2px; border-radius: 28px; z-index: -1;
  background: var(--grad); opacity: 0.55; filter: blur(18px);
}
.portrait-frame img {
  border-radius: 20px; width: 320px; height: 380px; object-fit: cover;
  object-position: center top;
}
.portrait-badge {
  position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 8px; white-space: nowrap;
  background: color-mix(in srgb, var(--bg-soft) 88%, transparent);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-strong); border-radius: 999px;
  padding: 9px 16px; font-size: 0.82rem; font-weight: 600;
  font-family: var(--font-display); box-shadow: var(--shadow);
}
.portrait-badge__dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent-3);
  box-shadow: 0 0 0 0 var(--accent-3); animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-3) 70%, transparent); }
  70% { box-shadow: 0 0 0 9px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* ---------- Metrics ---------- */
.metrics {
  max-width: var(--maxw); margin: 0 auto; padding: 20px 24px;
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px;
}
.metric {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 20px; text-align: center;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s;
}
.metric:hover { transform: translateY(-4px); border-color: var(--border-strong); background: var(--surface-2); }
.metric__num {
  display: block; font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.8rem, 3.4vw, 2.5rem); line-height: 1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.metric__num--text { font-size: clamp(1.5rem, 3vw, 2.1rem); }
.metric__label {
  display: block; margin-top: 10px; color: var(--text-mute);
  font-size: 0.82rem; letter-spacing: 0.5px; text-transform: uppercase; font-weight: 600;
}

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.4fr 0.9fr; gap: 36px; align-items: start; }
.about__text p { margin-bottom: 18px; color: var(--text-soft); font-size: 1.06rem; }
.about__text strong { color: var(--text); font-weight: 600; }
.about__card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
}
.about__card h3 {
  font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 18px;
}
.kv { list-style: none; }
.kv li {
  display: flex; flex-direction: column; gap: 2px;
  padding: 11px 0; border-bottom: 1px solid var(--border);
}
.kv li:last-child { border-bottom: none; }
.kv span { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-mute); }
.kv strong { font-weight: 600; font-size: 0.97rem; }
.kv a { color: var(--accent); }
.about__chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.chip {
  font-size: 0.78rem; font-weight: 600; font-family: var(--font-display);
  padding: 6px 12px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-soft);
}

/* ---------- Research grid ---------- */
.research-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.rcard {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 22px;
  transition: transform 0.25s ease, border-color 0.25s, background 0.25s;
  position: relative; overflow: hidden;
}
.rcard::before {
  content: ''; position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%);
  transition: opacity 0.3s;
}
.rcard:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.rcard:hover::before { opacity: 1; }
.rcard__icon {
  font-size: 1.8rem; margin-bottom: 14px;
  width: 52px; height: 52px; display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 14px;
}
.rcard h3 { font-family: var(--font-display); font-size: 1.02rem; margin-bottom: 8px; position: relative; }
.rcard p { color: var(--text-soft); font-size: 0.9rem; position: relative; }

/* ---------- Timeline ---------- */
.timeline { list-style: none; position: relative; max-width: 780px; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--accent), var(--accent-2), transparent);
}
.tl { position: relative; padding: 0 0 34px 42px; }
.tl:last-child { padding-bottom: 0; }
.tl__dot {
  position: absolute; left: 0; top: 6px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
}
.tl__time {
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--accent-3); font-weight: 500;
}
.tl__body h3 { font-family: var(--font-display); font-size: 1.18rem; margin: 5px 0 3px; }
.tl__org { color: var(--text-soft); font-size: 0.96rem; }

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.project {
  position: relative;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  box-shadow: 0 6px 18px -14px rgba(0, 0, 0, 0.5);
  transition: transform 0.25s ease, border-color 0.25s, box-shadow 0.25s;
}
.project:hover { transform: translateY(-5px); border-color: var(--border-strong); z-index: 1; box-shadow: 0 16px 34px -18px rgba(0, 0, 0, 0.6); }
.project__top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; }
.project__amount {
  font-family: var(--font-display); font-weight: 800; font-size: 1.6rem;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.project__year { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-mute); }
.project h3 { font-family: var(--font-display); font-size: 1.18rem; margin-bottom: 10px; }
.project p { color: var(--text-soft); font-size: 0.96rem; }
.project__funder { color: var(--text-mute) !important; font-size: 0.86rem !important; margin-top: 10px; font-style: italic; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.tags span {
  font-size: 0.74rem; font-weight: 600; padding: 5px 11px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-soft);
}

/* ---------- Projects list ---------- */
.proj-list { list-style: none; max-width: 940px; }
.proj {
  display: grid; grid-template-columns: 42px 1fr; gap: 18px; align-items: start;
  padding: 18px 8px; border-bottom: 1px solid var(--border); border-left: 2px solid transparent;
  transition: background 0.2s, border-color 0.2s;
}
.proj:hover { background: var(--surface); border-left-color: var(--accent); }
.proj__icon {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  font-size: 1.2rem; line-height: 1;
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  border: 1px solid var(--border);
}
.proj__top { display: flex; align-items: baseline; gap: 12px; margin-bottom: 4px; flex-wrap: wrap; }
.proj__year {
  font-family: var(--font-mono); font-weight: 500; font-size: 0.9rem; color: var(--accent);
}
.proj__badge {
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.02em; white-space: nowrap;
  padding: 2px 9px; border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 26%, transparent); color: var(--accent);
}
.proj__badge--fund {
  color: #fff; border-color: transparent; background: var(--grad);
}
.proj__title { font-family: var(--font-display); font-size: 1rem; font-weight: 600; line-height: 1.4; margin-bottom: 4px; color: var(--text); }
.proj__desc { color: var(--text-soft); font-size: 0.88rem; line-height: 1.55; margin-bottom: 6px; }
.proj__funder {
  color: var(--text-mute); font-size: 0.8rem; font-weight: 500; font-style: italic;
}
@media (max-width: 640px) {
  .proj { grid-template-columns: 34px 1fr; gap: 13px; }
  .proj__icon { width: 32px; height: 32px; font-size: 1.05rem; }
}

/* ---------- Publications ---------- */
.pub-controls {
  display: flex; justify-content: space-between; align-items: center; gap: 18px;
  flex-wrap: wrap; margin-bottom: 28px;
}
.pub-filter { display: flex; flex-wrap: wrap; gap: 8px; }
.pub-filter button {
  font-family: var(--font-display); font-weight: 600; font-size: 0.84rem;
  padding: 8px 14px; border-radius: 999px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-soft);
  transition: all 0.2s ease;
}
.pub-filter button:hover { border-color: var(--border-strong); color: var(--text); }
.pub-filter button.is-active { background: var(--grad); color: #fff; border-color: transparent; }
.pub-filter__n {
  display: inline-block; margin-left: 5px; padding: 1px 7px; border-radius: 999px;
  font-size: 0.72rem; background: var(--surface-2); color: var(--text-mute);
}
.pub-filter button.is-active .pub-filter__n { background: rgba(255,255,255,0.22); color: #fff; }
.pub-search {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 9px 14px; color: var(--text-mute); min-width: 260px; flex: 1; max-width: 340px;
}
.pub-search:focus-within { border-color: var(--accent); }
.pub-search input {
  background: none; border: none; outline: none; color: var(--text);
  font-family: var(--font-body); font-size: 0.92rem; width: 100%;
}
.pub-list { list-style: none; }
.pub {
  display: grid; grid-template-columns: 58px 1fr; gap: 20px; align-items: start;
  padding: 18px 8px; border-bottom: 1px solid var(--border); border-left: 2px solid transparent;
  transition: background 0.2s, border-color 0.2s; animation: fadeUp 0.4s ease both;
}
.pub:hover { background: var(--surface); }
.pub--journal:hover { border-left-color: var(--accent); }
.pub--conference:hover { border-left-color: var(--accent-3); }
.pub--book:hover { border-left-color: var(--accent-2); }
.pub__year {
  font-family: var(--font-mono); font-weight: 500; font-size: 0.95rem; color: var(--accent);
  padding-top: 1px;
}
.pub__title {
  display: inline; font-weight: 600; font-size: 1rem; color: var(--text);
  line-height: 1.45; text-decoration: none; transition: color 0.18s;
}
.pub__title:hover { color: var(--accent); }
.pub__ext {
  display: inline-block; margin-left: 5px; font-size: 0.82rem; color: var(--text-mute);
  opacity: 0; transform: translateY(-1px); transition: opacity 0.18s;
}
.pub__title:hover .pub__ext { opacity: 1; color: var(--accent); }
.pub__meta { margin-top: 5px; font-size: 0.9rem; color: var(--text-soft); }
.pub__authors .me { color: var(--accent-3); font-weight: 600; }
.pub__venue { font-style: italic; font-weight: 500; }
.pub__venue::before { content: ' · '; font-style: normal; color: var(--text-mute); }
.pub--journal .pub__venue { color: var(--accent); }
.pub--conference .pub__venue { color: var(--accent-3); }
.pub--book .pub__venue { color: var(--accent-2); }
.pub-empty { text-align: center; color: var(--text-mute); padding: 40px; }

/* BibTeX */
.pub__actions { margin-top: 9px; }
.pub__bib-toggle {
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 500;
  letter-spacing: 0.3px; cursor: pointer; color: var(--text-mute);
  background: var(--surface); border: 1px solid var(--border); border-radius: 7px;
  padding: 4px 10px; transition: all 0.18s ease;
}
.pub__bib-toggle:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface-2); }
.pub__bib-toggle[aria-expanded="true"] { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); }
.pub__bib {
  margin-top: 12px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--bg-soft); overflow: hidden; animation: fadeUp 0.3s ease both;
}
.pub__bib-code {
  margin: 0; padding: 16px 18px; overflow-x: auto;
  font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.6; color: var(--text-soft);
  white-space: pre; tab-size: 2;
}
.pub__bib-btns {
  display: flex; gap: 8px; padding: 10px 14px; border-top: 1px solid var(--border);
  background: var(--surface);
}
.pub__bib-copy, .pub__bib-dl {
  font-family: var(--font-display); font-size: 0.78rem; font-weight: 600; cursor: pointer;
  border-radius: 8px; padding: 6px 13px; transition: all 0.18s ease;
}
.pub__bib-copy { background: var(--grad); color: #fff; border: 1px solid transparent; }
.pub__bib-copy:hover { transform: translateY(-1px); }
.pub__bib-dl { background: transparent; color: var(--text-soft); border: 1px solid var(--border-strong); }
.pub__bib-dl:hover { color: var(--text); background: var(--surface-2); }

/* ---------- Teaching (per-course password gate) ---------- */
.teach__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.teach-card {
  display: flex; flex-direction: column; gap: 12px; padding: 24px 22px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: transform 0.22s ease, border-color 0.22s, background 0.22s;
}
.teach-card__title {
  font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; color: var(--text);
  display: flex; align-items: center; gap: 9px; line-height: 1.3;
}
.teach-card__lock { color: var(--text-mute); display: inline-flex; }
.teach-card__form { display: flex; gap: 8px; margin-top: auto; }
.teach-card__form input {
  flex: 1; min-width: 0; padding: 10px 13px; border-radius: 10px; font-size: 0.92rem;
  background: var(--bg-soft); border: 1px solid var(--border-strong); color: var(--text);
  font-family: var(--font-body); outline: none; transition: border-color 0.2s;
}
.teach-card__form input:focus { border-color: var(--accent); }
.teach-card__form .btn { padding: 10px 16px; font-size: 0.88rem; }
.teach-card__msg { font-size: 0.84rem; min-height: 1em; margin: -4px 0 0; color: var(--text-mute); }
.teach-card__msg.is-error { color: #e5484d; }
/* Unlocked (link) state */
.teach-card--open { text-decoration: none; }
.teach-card--open:hover { transform: translateY(-4px); border-color: var(--border-strong); background: var(--surface-2); }
.teach-card--open .teach-card__title { color: var(--text); }
.teach-card__ext { color: var(--accent); font-size: 0.85rem; }
.teach-card__desc { color: var(--text-soft); font-size: 0.9rem; }
.teach-card__open-tag {
  margin-top: auto; font-family: var(--font-mono); font-size: 0.74rem; font-weight: 500;
  color: var(--accent-3);
}

/* ---------- Partners ---------- */
.marquee {
  display: flex; flex-direction: column; gap: 16px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 7%, #000 93%, transparent);
}
.marquee__row { overflow: hidden; }
.marquee__track {
  display: flex; gap: 14px; width: max-content;
  animation: marquee-scroll 46s linear infinite;
}
.marquee__row--rev .marquee__track { animation-direction: reverse; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track span {
  white-space: nowrap; flex: none;
  padding: 14px 24px; border-radius: 12px;
  font-family: var(--font-display); font-weight: 600; font-size: 1rem;
  color: var(--text-soft);
  background: var(--surface); border: 1px solid var(--border);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.marquee__track span:hover {
  color: var(--text); border-color: var(--border-strong); background: var(--surface-2);
}
@keyframes marquee-scroll { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .marquee { -webkit-mask-image: none; mask-image: none; }
  .marquee__row { overflow-x: auto; }
  .marquee__track { animation: none; }
}

/* ---------- Contact ---------- */
.contact {
  position: relative; border-radius: 28px; overflow: hidden;
  border: 1px solid var(--border-strong);
  background: var(--surface);
}
.contact::before {
  content: ''; position: absolute; inset: 0; z-index: 0; opacity: 0.16;
  background: var(--grad);
}
.contact__inner { position: relative; z-index: 1; padding: 64px 48px; max-width: 680px; }
.contact__inner p { color: var(--text-soft); margin-top: 16px; font-size: 1.08rem; }
.contact__links { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  padding: 36px 24px; border-top: 1px solid var(--border);
  color: var(--text-mute); font-size: 0.9rem; flex-wrap: wrap; gap: 8px;
}
.footer__meta { font-family: var(--font-mono); letter-spacing: 0.5px; }
.footer__meta a { color: var(--accent); font-weight: 500; }
.footer__meta a:hover { text-decoration: underline; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 130px; }
  .hero__lede { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .hero__portrait { order: -1; }
  .about { grid-template-columns: 1fr; }
  .research-grid { grid-template-columns: repeat(2, 1fr); }
  .projects { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
  .teach__grid { grid-template-columns: 1fr; }
  .nav__links { display: none; }
  .icon-btn--menu { display: grid; }
  .nav__links.is-open {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: 72px; right: 16px; left: 16px;
    background: var(--bg-soft); border: 1px solid var(--border); border-radius: 16px;
    padding: 16px; box-shadow: var(--shadow);
  }
  .nav__links.is-open a { padding: 10px 8px; }
  .section { padding: 64px 20px; }
  .pub { grid-template-columns: 46px 1fr; gap: 14px; }
  .contact__inner { padding: 40px 26px; }
}
@media (max-width: 520px) {
  .research-grid, .metrics { grid-template-columns: 1fr 1fr; }
  .portrait-frame img { width: 260px; height: 310px; }
  .nav__brand-text { display: none; }
}