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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(240, 122, 46, 0.25); }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; font-weight: 700; }
a { color: var(--terra); text-decoration: none; }
a:hover { color: var(--orange); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ---------- ambient background ---------- */
.ambient {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(52vw 42vw at 88% -8%, rgba(240, 122, 46, 0.12), transparent 62%),
    radial-gradient(46vw 38vw at -10% 22%, rgba(235, 179, 146, 0.22), transparent 60%),
    radial-gradient(50vw 46vw at 108% 78%, rgba(245, 158, 11, 0.10), transparent 62%),
    var(--bg);
}
.ambient::after {
  content: ""; position: absolute; inset: 0; opacity: 0.5;
  background-image:
    linear-gradient(rgba(124, 48, 34, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 48, 34, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(80vw 60vh at 60% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(80vw 60vh at 60% 0%, #000 0%, transparent 78%);
}

/* decorative four-point star (SKYAIFOX motif) */
.star { display: inline-block; width: 1em; height: 1em; vertical-align: -0.12em; }

/* ---------- topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: var(--space-4);
  padding: 0.8rem clamp(1rem, 4vw, 2.6rem);
  background: rgba(253, 246, 241, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: var(--line);
}
.brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-weight: 800; font-size: 1.06rem; letter-spacing: 0.01em; color: var(--ink);
}
.brand .star { width: 1.15em; height: 1.15em; }
.brand:hover { color: var(--brick); }
.topnav { display: flex; gap: clamp(0.7rem, 1.6vw, 1.5rem); margin-left: auto; flex-wrap: wrap; }
.topnav a {
  font-size: var(--text-sm); font-weight: 550; color: var(--body);
  padding: 0.28rem 0.15rem; border-bottom: 2px solid transparent;
}
.topnav a:hover { color: var(--brick); border-bottom-color: var(--orange); }

.lang-switch {
  display: inline-flex; gap: 2px; padding: 3px;
  background: var(--surface-tint); border: var(--line); border-radius: 999px;
}
.lang-btn {
  border: 0; background: transparent; color: var(--body);
  font-size: 0.78rem; font-weight: 650; letter-spacing: 0.02em;
  padding: 0.3rem 0.66rem; border-radius: 999px; transition: all .18s ease;
}
.lang-btn:hover { color: var(--brick); }
.lang-btn.is-active { background: var(--surface); color: var(--brick); box-shadow: 0 1px 4px rgba(124,48,34,.14); }

/* ---------- layout ---------- */
main { width: var(--container); margin: 0 auto; }
.section { padding: var(--space-6) 0; }
.section + .section { border-top: 1px dashed rgba(124, 48, 34, 0.14); }

.section-head { max-width: 46rem; margin-bottom: var(--space-5); }
.section-index {
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 600;
  color: var(--orange); letter-spacing: 0.22em; margin-bottom: 0.5rem;
}
.section-index::after { content: " ///"; color: var(--peach); }
.section-head h2 { font-size: var(--text-xl); margin-bottom: 0.6rem; letter-spacing: -0.01em; }
.section-head p { font-size: var(--text-sm); }

.card {
  background: var(--surface); border: var(--line); border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

/* reveal animation */
.panel-reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.panel-reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .panel-reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- hero ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(260px, 1fr); gap: var(--space-5); align-items: start; padding-top: var(--space-6); }
.hero-main { padding: clamp(1.6rem, 3.4vw, 2.8rem); background: linear-gradient(150deg, #FFFFFF 0%, #FDF6F1 78%, #FBEAD9 100%); }
.hero-kicker {
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 600;
  color: var(--terra); letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: var(--space-3);
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.hero h1 { font-size: var(--text-hero); font-weight: 800; letter-spacing: -0.02em; margin-bottom: var(--space-3); }
.hero h1 .accent {
  background: var(--grad-accent);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: var(--text-lg); line-height: 1.6; max-width: 36em; margin-bottom: var(--space-4); }

.chip-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: var(--space-4); }
.chip {
  font-size: var(--text-xs); font-weight: 600; color: var(--brick);
  background: var(--orange-soft); border: 1px solid rgba(240, 122, 46, 0.28);
  padding: 0.32rem 0.75rem; border-radius: 999px;
}

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-2); margin-bottom: var(--space-4); }
.stat {
  padding: 0.9rem 1rem; border-radius: var(--radius-sm);
  background: var(--surface); border: var(--line);
}
.stat-value {
  font-family: var(--font-mono); font-size: clamp(1.35rem, 1.1rem + 0.9vw, 1.9rem);
  font-weight: 700; color: var(--brick); line-height: 1.1;
}
.stat-value .unit { font-size: 0.6em; color: var(--orange); }
.stat-label { font-size: var(--text-xs); color: var(--muted); margin-top: 0.3rem; line-height: 1.4; }

.cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: var(--text-sm); font-weight: 650;
  padding: 0.68rem 1.25rem; border-radius: 999px; border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--grad-accent); color: #fff;
  box-shadow: 0 8px 20px -8px rgba(201, 87, 63, 0.55);
}
.btn-primary:hover { color: #fff; box-shadow: 0 12px 26px -8px rgba(201, 87, 63, 0.65); transform: translateY(-1px); }
.btn-ghost { background: var(--surface); border-color: var(--border-strong); color: var(--brick); }
.btn-ghost:hover { border-color: var(--orange); color: var(--brick); transform: translateY(-1px); }

.hero-side { display: grid; gap: var(--space-2); }
.hero-photo { overflow: hidden; padding: 0.6rem; }
.hero-photo img { border-radius: calc(var(--radius-md) - 0.35rem); width: 100%; aspect-ratio: 1; object-fit: cover; }
.hero-photo figcaption {
  display: flex; justify-content: space-between; gap: 0.6rem; flex-wrap: wrap;
  font-size: var(--text-xs); color: var(--muted); padding: 0.55rem 0.35rem 0.2rem;
}
.hero-note {
  padding: 0.95rem 1.1rem; font-size: var(--text-xs); line-height: 1.6;
  background: var(--surface-warm); border: var(--line); border-radius: var(--radius-sm); color: var(--body);
}
.hero-note strong { color: var(--brick); }

/* ---------- journey timeline ---------- */
.timeline { position: relative; display: grid; gap: var(--space-3); padding-left: 1.6rem; }
.timeline::before {
  content: ""; position: absolute; left: 0.42rem; top: 0.4rem; bottom: 0.4rem;
  width: 2px; background: linear-gradient(var(--peach), var(--orange), var(--peach));
  border-radius: 2px;
}
.timeline-item { position: relative; padding: 1.1rem 1.3rem; }
.timeline-item::before {
  content: ""; position: absolute; left: -1.53rem; top: 1.45rem;
  width: 0.8rem; height: 0.8rem; border-radius: 50%;
  background: var(--surface); border: 3px solid var(--orange);
  box-shadow: 0 0 0 4px rgba(240, 122, 46, 0.14);
}
.timeline-year {
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 700;
  color: var(--orange); letter-spacing: 0.08em;
}
.timeline-item h3 { font-size: var(--text-base); margin: 0.2rem 0 0.25rem; }
.timeline-org { font-size: var(--text-xs); font-weight: 650; color: var(--terra); margin-bottom: 0.35rem; }
.timeline-item p { font-size: var(--text-sm); }
.timeline-item .src { margin-top: 0.4rem; }

/* ---------- publications ---------- */
.pub-grid { display: grid; gap: var(--space-3); }
.pub-card { display: grid; grid-template-columns: auto 1fr; gap: 1.2rem; padding: 1.35rem 1.5rem; transition: box-shadow .2s ease, transform .2s ease; }
.pub-card:hover { box-shadow: var(--shadow-lift); transform: translateY(-2px); }
.pub-venue {
  align-self: start; text-align: center; min-width: 5.4rem;
  padding: 0.55rem 0.7rem; border-radius: var(--radius-sm);
  background: linear-gradient(150deg, var(--brick), var(--terra));
  color: #FBEEE6;
}
.pub-venue .v-name { font-family: var(--font-mono); font-weight: 700; font-size: 0.92rem; letter-spacing: 0.03em; display: block; color: #fff; }
.pub-venue .v-year { font-family: var(--font-mono); font-size: 0.74rem; opacity: 0.85; }
.pub-card h3 { font-size: var(--text-base); margin-bottom: 0.35rem; }
.pub-card h3 a { color: inherit; }
.pub-card h3 a:hover { color: var(--terra); }
.pub-meta { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 0.5rem; }
.pub-card p { font-size: var(--text-sm); }
.badge {
  display: inline-flex; align-items: center; gap: 0.3rem;
  font-size: 0.72rem; font-weight: 650; letter-spacing: 0.02em;
  padding: 0.16rem 0.6rem; border-radius: 999px;
  background: var(--surface-warm); border: 1px solid var(--border); color: var(--brick);
}
.badge.hot { background: var(--orange-soft); border-color: rgba(240, 122, 46, 0.35); color: var(--terra-dark); }

/* ---------- vulnerability research ---------- */
.vuln-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr); gap: var(--space-4); align-items: start; }
.vendor-cards { display: grid; gap: var(--space-2); }
.vendor-card { display: flex; align-items: center; gap: 0.9rem; padding: 0.95rem 1.15rem; }
.vendor-mark {
  width: 2.6rem; height: 2.6rem; border-radius: var(--radius-xs); flex: none;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 1.05rem; color: #fff;
  background: var(--grad-accent);
}
.vendor-card:nth-child(2n) .vendor-mark { background: linear-gradient(140deg, var(--amber), var(--orange)); }
.vendor-card:nth-child(3n) .vendor-mark { background: linear-gradient(140deg, var(--terra), var(--brick)); }
.vendor-card h3 { font-size: var(--text-sm); }
.vendor-card p { font-size: var(--text-xs); color: var(--muted); }
.vendor-count { margin-left: auto; font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem; color: var(--orange); }

.cve-panel { overflow: hidden; }
.cve-panel-head { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: baseline; padding: 1.1rem 1.3rem 0.4rem; }
.cve-panel-head h3 { font-size: var(--text-base); }
.cve-panel-head span { font-size: var(--text-xs); color: var(--muted); }
.table-scroll { overflow-x: auto; }
.cve-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.cve-table th {
  text-align: left; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); padding: 0.7rem 1rem; border-bottom: var(--line); white-space: nowrap;
}
.cve-table td { padding: 0.62rem 1rem; border-bottom: 1px solid rgba(124, 48, 34, 0.07); vertical-align: top; }
.cve-table tr:last-child td { border-bottom: 0; }
.cve-table tbody tr:hover { background: rgba(240, 122, 46, 0.05); }
.cve-id { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600; color: var(--brick); white-space: nowrap; }
.cve-note { padding: 0.9rem 1.3rem; font-size: var(--text-xs); color: var(--muted); background: var(--surface-warm); border-top: var(--line); line-height: 1.6; }

/* ---------- awards ---------- */
.award-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: var(--space-2); }
.award-card { padding: 1.15rem 1.25rem; position: relative; overflow: hidden; }
.award-card::after {
  content: ""; position: absolute; right: -1.4rem; top: -1.4rem; width: 5.4rem; height: 5.4rem;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.16), transparent 70%);
}
.award-year { font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 700; color: var(--amber); }
.award-card h3 { font-size: var(--text-sm); margin: 0.25rem 0 0.3rem; }
.award-card p { font-size: var(--text-xs); }
.award-card .src { margin-top: 0.45rem; }

/* ---------- talks ---------- */
.talk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-2); }
.talk-card { padding: 1.2rem 1.3rem; display: flex; flex-direction: column; gap: 0.45rem; transition: box-shadow .2s ease, transform .2s ease; }
.talk-card:hover { box-shadow: var(--shadow-lift); transform: translateY(-2px); }
.talk-top { display: flex; align-items: center; gap: 0.55rem; flex-wrap: wrap; }
.talk-conf {
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 700; letter-spacing: 0.05em;
  color: #fff; background: var(--grad-accent); padding: 0.18rem 0.6rem; border-radius: var(--radius-xs);
}
.talk-card[data-kind="teaching"] .talk-conf { background: linear-gradient(140deg, var(--amber), var(--orange)); }
.talk-year { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--muted); font-weight: 600; }
.talk-card h3 { font-size: var(--text-sm); line-height: 1.45; }
.talk-card p { font-size: var(--text-xs); }
.talk-card .src { margin-top: auto; padding-top: 0.3rem; }

/* ---------- media ---------- */
.media-list { display: grid; gap: var(--space-2); }
.media-item { display: grid; grid-template-columns: auto 1fr; gap: 1rem; padding: 1rem 1.2rem; align-items: start; }
.media-outlet {
  min-width: 6.2rem; text-align: center; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
  color: var(--terra-dark); background: var(--surface-warm); border: var(--line);
  padding: 0.4rem 0.6rem; border-radius: var(--radius-xs);
}
.media-item h3 { font-size: var(--text-sm); margin-bottom: 0.2rem; }
.media-item h3 a { color: inherit; }
.media-item h3 a:hover { color: var(--terra); }
.media-item p { font-size: var(--text-xs); }

/* ---------- ventures ---------- */
.venture-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: var(--space-3); }
.venture-card { padding: 1.4rem 1.5rem; display: flex; flex-direction: column; gap: 0.6rem; transition: box-shadow .2s ease, transform .2s ease; }
.venture-card:hover { box-shadow: var(--shadow-lift); transform: translateY(-2px); }
.venture-head { display: flex; align-items: center; gap: 0.85rem; }
.venture-logo {
  width: 3rem; height: 3rem; border-radius: var(--radius-sm); flex: none;
  display: grid; place-items: center; font-weight: 800; font-size: 1.15rem; color: #fff;
  background: var(--grad-accent); box-shadow: 0 6px 14px -6px rgba(201, 87, 63, 0.5);
}
.venture-card:nth-child(2) .venture-logo { background: linear-gradient(140deg, var(--amber), var(--orange)); }
.venture-card:nth-child(3) .venture-logo { background: linear-gradient(140deg, var(--terra), var(--brick)); }
.venture-head h3 { font-size: var(--text-base); }
.venture-period { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); font-weight: 600; }
.venture-card p { font-size: var(--text-sm); }
.venture-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.venture-card .src { margin-top: auto; padding-top: 0.4rem; }

/* ---------- open source ---------- */
.oss-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: var(--space-2); }
.oss-card { padding: 1.1rem 1.25rem; display: flex; flex-direction: column; gap: 0.45rem; }
.oss-card h3 { font-family: var(--font-mono); font-size: var(--text-sm); font-weight: 650; }
.oss-card p { font-size: var(--text-xs); }

/* ---------- source link ---------- */
.src { font-size: var(--text-xs); }
.src a {
  display: inline-flex; align-items: center; gap: 0.3rem;
  font-weight: 600; color: var(--terra);
  border-bottom: 1px dashed rgba(201, 87, 63, 0.4); padding-bottom: 1px;
}
.src a:hover { color: var(--orange); border-bottom-color: var(--orange); }
.src a::after { content: "↗"; font-size: 0.85em; }

/* ---------- contact ---------- */
.contact-panel {
  padding: clamp(1.8rem, 4vw, 3rem);
  background: var(--grad-panel);
  border: 1px solid rgba(240, 122, 46, 0.25);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  position: relative; overflow: hidden;
}
.contact-panel::before {
  content: ""; position: absolute; right: -6rem; top: -6rem; width: 18rem; height: 18rem;
  background: radial-gradient(circle, rgba(240, 122, 46, 0.16), transparent 68%);
}
.contact-panel h2 { font-size: var(--text-xl); margin-bottom: 0.6rem; }
.contact-panel > p { font-size: var(--text-sm); max-width: 40em; margin-bottom: var(--space-4); }
.contact-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; position: relative; }

/* ---------- footer ---------- */
.footer {
  width: var(--container); margin: 0 auto; padding: var(--space-4) 0 var(--space-5);
  border-top: 1px dashed rgba(124, 48, 34, 0.14);
  display: flex; flex-wrap: wrap; gap: 0.8rem; justify-content: space-between;
  font-size: var(--text-xs); color: var(--muted);
}
.footer a { color: var(--muted); }
.footer a:hover { color: var(--terra); }

.noscript-note {
  width: var(--container); margin: 1rem auto; padding: 1rem 1.2rem;
  background: var(--surface-warm); border: var(--line); border-radius: var(--radius-sm);
  font-size: var(--text-sm); color: var(--body);
}

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .hero-side { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
  .hero-photo { max-width: 320px; }
  .vuln-layout { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .topnav { display: none; }
  .pub-card { grid-template-columns: 1fr; }
  .pub-venue { justify-self: start; display: inline-flex; gap: 0.5rem; align-items: baseline; min-width: 0; }
  .media-item { grid-template-columns: 1fr; }
  .media-outlet { justify-self: start; }
}