/* ============================================================
   Sections — hero, value dial, research, industry, projects,
   publications, teaching/awards, beyond, contact, footer.
   Shared primitives (buttons, nav, reveal) live in base.css.
   ============================================================ */

/* ---------- hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 700px 420px at 82% 18%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%),
    radial-gradient(ellipse 600px 400px at 8% 85%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 70%);
  pointer-events: none;
}
.hero .wrap { display: grid; grid-template-columns: 1.35fr 0.9fr; gap: 60px; align-items: center; }

.hero-kicker { margin-bottom: 22px; }
.hero h1 {
  font-size: clamp(2.5rem, 5.4vw, 4.1rem);
  line-height: 1.06;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
}
.hero-sub {
  margin-top: 24px;
  font-size: 1.18rem;
  color: var(--text-dim);
  max-width: 560px;
}
.pill-row {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-portrait {
  position: relative;
  justify-self: center;
}
.hero-portrait .frame {
  width: 300px; height: 360px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
}
.hero-portrait img { width: 100%; height: 100%; object-fit: cover; filter: contrast(1.03); }
.hero-portrait .tag {
  position: absolute;
  bottom: -18px; left: -22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  font-family: var(--sans);
  font-size: 0.72rem;
  color: var(--text-dim);
  box-shadow: var(--shadow);
  line-height: 1.5;
}
.hero-portrait .tag b { color: var(--accent-2); display: block; font-size: 0.9rem; }

.scroll-cue {
  position: absolute;
  bottom: 34px; left: 28px;
  font-family: var(--sans);
  font-size: 0.7rem;
  color: var(--text-faint);
  display: flex;
  align-items: center;
  gap: 10px;
}
.scroll-cue .line { width: 32px; height: 1px; background: var(--text-faint); animation: pulse-line 2s infinite; }
@keyframes pulse-line { 50% { transform: scaleX(0.4); opacity: 0.4; } }

/* ---------- value dial ---------- */
.dial-section { background: var(--bg-soft); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.dial-head { max-width: 720px; }
.dial-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.5rem); margin-top: 10px; }
.dial-head p { color: var(--text-dim); margin-top: 16px; font-size: 1.03rem; }

.dial-control {
  margin-top: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
}
.dial-control-row { display: flex; align-items: center; gap: 20px; }
.dial-side {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.dial-side.left { color: var(--accent-soft); }
.dial-side.right { color: var(--accent-2-soft); }
.dial-side .dot { width: 8px; height: 8px; border-radius: 50%; }
.dial-side.left .dot { background: var(--accent); }
.dial-side.right .dot { background: var(--accent-2); }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--border) 50%, var(--accent-2));
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--text);
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}
input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--text);
  cursor: pointer;
}

.dial-readout {
  margin-top: 14px;
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--text-dim);
  text-align: center;
}
.dial-readout b { color: var(--text); }

.dial-filters {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.dial-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.dial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: 12px;
  padding: 22px 22px 20px;
  will-change: transform;
  transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.25s ease, background 0.2s ease;
}
.dial-card:hover { background: var(--bg-card-hover); }
.dial-card.cat-research { border-left-color: var(--accent); }
.dial-card.cat-industry { border-left-color: var(--accent-2); }
.dial-card.cat-teaching,
.dial-card.cat-personal { border-left-color: var(--text-faint); }
.dial-card.is-hidden { display: none; }

.dial-card-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.dial-card h4 { font-size: 1.08rem; line-height: 1.3; }
.dial-card .meta { font-family: var(--sans); font-size: 0.7rem; color: var(--text-faint); margin-top: 6px; }
.dial-card p { font-size: 0.9rem; color: var(--text-dim); margin: 12px 0 0; line-height: 1.55; }
.dial-card .tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.dial-card .tags span {
  font-family: var(--sans); font-size: 0.63rem; letter-spacing: 0.03em;
  padding: 3px 8px; border-radius: 999px; background: var(--bg-soft); color: var(--text-faint);
}
.score-badge {
  font-family: var(--sans);
  font-size: 0.65rem;
  color: var(--text-faint);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 9px;
  flex-shrink: 0;
}

/* ---------- research / built ---------- */
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }

.research-list { display: flex; flex-direction: column; gap: 22px; }
.research-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 34px;
}
.research-card .rc-meta {
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--text-faint);
}
.research-card .rc-meta .org { color: var(--accent-soft); display: block; margin-top: 6px; font-size: 0.8rem; }
.research-card h3 { font-size: 1.35rem; margin-bottom: 14px; }
.research-card .challenge {
  font-size: 0.9rem;
  color: var(--text-dim);
  border-left: 2px solid var(--border);
  padding-left: 14px;
  margin-bottom: 16px;
  font-style: italic;
}
.research-card ul { margin: 0; padding-left: 18px; color: var(--text-dim); font-size: 0.94rem; }
.research-card li { margin-bottom: 8px; line-height: 1.6; }
.research-card li::marker { color: var(--accent); }
.research-card .rc-tags { margin-top: 18px; display: flex; gap: 8px; flex-wrap: wrap; }
.research-card .rc-tags span {
  font-family: var(--sans); font-size: 0.65rem; padding: 4px 10px; border-radius: 999px;
  background: var(--bg-soft); color: var(--text-faint); border: 1px solid var(--border-soft);
}

/* ---------- industry timeline ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 1px; background: var(--border); }
.tl-item { position: relative; padding-bottom: 44px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute; left: -34px; top: 4px;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent-2);
}
.tl-item .tl-date { font-family: var(--sans); font-size: 0.72rem; color: var(--text-faint); }
.tl-item h3 { font-size: 1.2rem; margin-top: 8px; }
.tl-item .tl-org { color: var(--accent-2-soft); font-size: 0.92rem; margin-top: 3px; font-family: var(--sans); }
.tl-item ul { margin: 14px 0 0; padding-left: 18px; color: var(--text-dim); font-size: 0.93rem; }
.tl-item li { margin-bottom: 7px; line-height: 1.6; }
.tl-item li::marker { color: var(--accent-2); }

/* ---------- academic projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
}
.project-card:hover { border-color: var(--accent-2); transform: translateY(-3px); }
.project-card .pc-top { display: flex; justify-content: space-between; align-items: center; }
.project-card h4 { font-size: 1.05rem; }
.project-card .pc-year { font-family: var(--sans); font-size: 0.68rem; color: var(--text-faint); }
.project-card p { color: var(--text-dim); font-size: 0.9rem; margin-top: 12px; flex: 1; }
.project-card .pc-link {
  margin-top: 16px;
  font-family: var(--sans); font-size: 0.72rem; color: var(--accent-soft);
  display: inline-flex; align-items: center; gap: 6px;
}
.project-card .pc-link svg { width: 12px; height: 12px; }

/* ---------- publications ---------- */
.pub-list { display: flex; flex-direction: column; }
.pub-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 26px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-soft);
}
.pub-item:first-child { border-top: 1px solid var(--border-soft); }
.pub-item .pub-year { font-family: var(--sans); color: var(--accent-soft); font-size: 0.85rem; }
.pub-item p { margin: 0; font-size: 0.97rem; color: var(--text-dim); line-height: 1.65; }
.pub-item b { color: var(--text); }
.pub-item a { color: var(--accent-2-soft); border-bottom: 1px dotted var(--accent-2-soft); }
.pub-item .venue { display: block; margin-top: 6px; font-family: var(--sans); font-size: 0.72rem; color: var(--text-faint); }

/* ---------- teaching ---------- */
.mini-list { list-style: none; margin: 32px 0 0; padding: 0; }
.mini-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
}
.mini-list li:first-child { border-top: 1px solid var(--border-soft); }
.mini-list .ml-title { font-size: 0.96rem; color: var(--text); }
.mini-list .ml-sub { display: block; font-size: 0.82rem; color: var(--text-faint); margin-top: 3px; }
.mini-list .ml-year { font-family: var(--sans); font-size: 0.72rem; color: var(--text-faint); white-space: nowrap; }
.subhead { font-family: var(--sans); font-weight: 500; font-size: 0.75rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 18px; }

/* ---------- volunteer ---------- */
.volunteer-list { list-style: none; margin: 32px auto 0; padding: 0; max-width: 560px; }
.volunteer-list li { padding: 14px 0; border-bottom: 1px solid var(--border-soft); font-size: 0.95rem; text-align: left; display: flex; justify-content: space-between; gap: 16px; align-items: baseline; }
.volunteer-list li:first-child { border-top: 1px solid var(--border-soft); }
.volunteer-list .v-org { color: var(--text); }
.volunteer-list .v-role { color: var(--text-faint); font-size: 0.82rem; text-align: right; white-space: nowrap; }
.medium-tags { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- believe (values statement) ---------- */
.believe-section { text-align: center; }
.believe-statement {
  max-width: 780px;
  margin: 18px auto 0;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  line-height: 1.5;
  color: var(--text);
}
.believe-statement em { font-style: italic; color: var(--accent); }

/* ---------- section intro paragraph ---------- */
.section-intro { max-width: 680px; color: var(--text-dim); font-size: 1.02rem; margin-top: 14px; line-height: 1.7; }

/* ---------- labeled sub-block (used for publications list) ---------- */
.mini-link-row { margin-top: 40px; }
.mini-link-row .subhead { margin-bottom: 14px; }

/* ---------- art section (expanded) ---------- */
.art-section { text-align: center; }
.art-statement {
  max-width: 640px;
  margin: 18px auto 0;
  color: var(--text-dim);
  font-size: 1.08rem;
  line-height: 1.7;
}
.art-section .medium-tags { justify-content: center; margin: 22px 0; }
.art-section .medium-tags span {
  font-family: var(--sans); font-size: 0.72rem; padding: 6px 14px; border-radius: 999px;
  background: var(--bg-card); border: 1px solid var(--border-soft); color: var(--text-dim);
}

/* ---------- flip book (art gallery) ---------- */
.flipbook { max-width: 340px; margin: 36px auto 28px; }
.flipbook-stage {
  position: relative;
  aspect-ratio: 4 / 5;
  perspective: 1600px;
}
.flip-card {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: var(--bg-card);
  transform-origin: left center;
  transition: transform 0.5s cubic-bezier(.3,.1,.2,1), opacity 0.4s ease;
}
.flip-card img { width: 100%; height: 100%; object-fit: cover; display: block; }
.flipbook-controls { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 18px; }
.flipbook-controls button {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: border-color 0.2s, color 0.2s;
}
.flipbook-controls button:hover { border-color: var(--accent-2); color: var(--accent-2); }
.flipbook-controls button svg { width: 16px; height: 16px; }
.flip-counter { font-family: var(--sans); font-size: 0.82rem; color: var(--text-faint); min-width: 54px; text-align: center; }

/* ---------- contact / footer ---------- */
.contact-section { text-align: center; }
.contact-section h2 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
.contact-section p { color: var(--text-dim); margin: 18px auto 0; max-width: 520px; }
.contact-links { margin-top: 40px; display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

footer { padding: 34px 0; border-top: 1px solid var(--border-soft); }
footer .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; }
footer p { font-family: var(--sans); font-size: 0.72rem; color: var(--text-faint); margin: 0; }