/* ==========================================================================
   soja.me — personal site
   ========================================================================== */

:root {
  --bg: #0b0d10;
  --bg-soft: #11151a;
  --bg-card: #141a21;
  --line: #222b35;
  --text: #e6ebf1;
  --muted: #93a1b1;
  --dim: #6b7a8c;
  --accent: #ff7a2f;
  --accent-2: #35c8d4;
  --accent-soft: rgba(255, 122, 47, 0.12);
  --radius: 14px;
  --maxw: 1120px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.75);
}

html[data-theme="light"] {
  --bg: #f7f8fa;
  --bg-soft: #ffffff;
  --bg-card: #ffffff;
  --line: #e2e6ec;
  --text: #10151b;
  --muted: #4d5a68;
  --dim: #7a8796;
  --accent: #e0561a;
  --accent-2: #0d8f9b;
  --accent-soft: rgba(224, 86, 26, 0.1);
  --shadow: 0 18px 40px -22px rgba(16, 21, 27, 0.28);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

a { color: var(--accent); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--accent-2); }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .6em; font-weight: 700; letter-spacing: -0.02em; }
p { margin: 0 0 1em; color: var(--muted); }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }
.accent { color: var(--accent); }

/* ---------- skip link ---------- */
.skip {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; color: #fff; }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }

.brand { font-family: var(--mono); font-weight: 700; font-size: 1rem; color: var(--text); white-space: nowrap; }
.brand:hover { color: var(--text); }
.brand .tilde { color: var(--accent); }
.brand .caret {
  color: var(--accent-2); animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: var(--muted); font-size: .88rem; padding: 8px 10px; border-radius: 8px;
  font-weight: 500; transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--bg-card); }
.nav-links a.active { color: var(--accent); background: var(--accent-soft); }
.nav-links a.ext { color: var(--accent-2); }

.nav-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px; display: grid; place-items: center; cursor: pointer;
  background: transparent; border: 1px solid var(--line); border-radius: 10px;
  color: var(--muted); transition: all .2s ease; padding: 0;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }
.nav-toggle { display: none; }
html[data-theme="light"] .icon-theme .moon { display: none; }
html[data-theme="light"] .icon-theme .sun { display: block; }
.icon-theme .sun { display: none; }
.icon-theme .moon { display: block; }

@media (max-width: 900px) {
  .nav-toggle { display: grid; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--bg-soft); border-bottom: 1px solid var(--line);
    padding: 12px 16px 18px; box-shadow: var(--shadow);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; font-size: 1rem; }
}

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  padding: 120px 0 80px; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: url("../img/intro-bg.jpg") center 45%/cover no-repeat;
  opacity: .62; filter: grayscale(12%) brightness(1.18) contrast(1.02);
  mask-image: linear-gradient(180deg, #000 0%, #000 62%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 62%, transparent 100%);
}
.hero-scrim {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    linear-gradient(100deg, var(--bg) 4%, color-mix(in srgb, var(--bg) 70%, transparent) 38%, transparent 72%),
    linear-gradient(180deg, var(--bg) 0%, transparent 18%);
}
.hero-glow {
  position: absolute; z-index: 0; border-radius: 50%; filter: blur(90px); opacity: .5;
  pointer-events: none;
}
.hero-glow.one { width: 520px; height: 520px; top: -120px; right: -80px; background: radial-gradient(circle, rgba(255,122,47,.35), transparent 70%); }
.hero-glow.two { width: 480px; height: 480px; bottom: -160px; left: -120px; background: radial-gradient(circle, rgba(53,200,212,.28), transparent 70%); }
.hero .wrap { position: relative; z-index: 1; }

.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: start; }
.hero-grid > .hero-side { margin-top: 84px; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } .hero-grid > .hero-side { margin-top: 0; } }

.currently { display: none; }

.open-to {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px;
  margin: 0 auto 28px; max-width: 640px;
}
.open-to-k {
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2);
}
.open-to ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.open-to li {
  font-family: var(--mono); font-size: .78rem; color: var(--muted);
  border: 1px solid var(--line); background: var(--bg-card);
  padding: 5px 11px; border-radius: 999px;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent-2); background: color-mix(in srgb, var(--accent-2) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent-2) 30%, transparent);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 0 currentColor; animation: pulse 2.2s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-2) 60%, transparent); }
  70% { box-shadow: 0 0 0 9px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.hero h1 { font-size: clamp(2.6rem, 6.5vw, 4.3rem); margin-bottom: .2em; }
.hero h1 .light { color: var(--dim); font-weight: 300; }
.hero h1 .so {
  text-shadow:
    0 0 3px color-mix(in srgb, var(--accent) 50%, transparent),
    0 0 8px color-mix(in srgb, var(--accent) 32%, transparent);
}
.hero-role { font-size: clamp(1.05rem, 2.2vw, 1.35rem); color: var(--text); font-weight: 600; margin-bottom: .5em; }
.hero-role .sep { color: var(--accent); margin: 0 10px; }
.hero-lede { max-width: 60ch; font-size: 1.05rem; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn {
  display: inline-flex; align-items: center; gap: 9px; cursor: pointer;
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: .95rem;
  border: 1px solid var(--line); background: var(--bg-card); color: var(--text);
  transition: transform .18s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease;
}
.btn:hover { transform: translateY(-2px); color: var(--text); border-color: var(--accent); box-shadow: var(--shadow); }
.btn svg { width: 17px; height: 17px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff9d5c); border-color: transparent; color: #14100c;
}
.btn-primary:hover { color: #14100c; }

/* terminal card */
.terminal {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; font-family: var(--mono); font-size: .88rem;
}
.terminal-bar { display: flex; align-items: center; gap: 7px; padding: 11px 14px; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg-soft) 70%, transparent); }
.terminal-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.terminal-bar i:nth-child(1) { background: #ff5f57; }
.terminal-bar i:nth-child(2) { background: #febc2e; }
.terminal-bar i:nth-child(3) { background: #28c840; }
.terminal-bar span { margin-left: auto; color: var(--dim); font-size: .75rem; }
.terminal-body { padding: 18px 18px 22px; line-height: 1.85; min-height: 180px; }
.terminal-body .cmd { color: var(--text); }
.terminal-body .prompt { color: var(--accent-2); }
.terminal-body .kw { color: var(--dim); }
.terminal-body .fn { color: var(--accent); }
.terminal-body .out { color: var(--muted); }
.cursor { display: inline-block; width: 8px; background: var(--accent); animation: blink 1.05s steps(1) infinite; color: transparent; }

.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 1;
  display: grid; justify-items: center; gap: 8px; color: var(--dim); font-family: var(--mono); font-size: .7rem;
  letter-spacing: .12em; text-transform: uppercase;
}
.mouse { width: 22px; height: 34px; border: 1.5px solid var(--dim); border-radius: 12px; position: relative; }
.mouse::after {
  content: ""; position: absolute; left: 50%; top: 7px; width: 2px; height: 6px; margin-left: -1px;
  background: var(--accent); border-radius: 2px; animation: wheel 1.6s ease-in-out infinite;
}
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(11px); } }
@media (max-width: 900px) { .scroll-hint { display: none; } }

/* ---------- sections ---------- */
section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { margin-bottom: 48px; max-width: 66ch; }
.section-num { font-family: var(--mono); color: var(--accent); font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; display: block; margin-bottom: 10px; }
.section-head h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin-bottom: .35em; }
.section-head p { font-size: 1.03rem; margin: 0; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 48px; align-items: start; }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; gap: 36px; } }
.about-grid p { font-size: 1.05rem; }

.stats { display: grid; gap: 14px; }
.stat {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 20px; display: flex; align-items: baseline; gap: 14px;
}
.stat b { font-family: var(--mono); font-size: 1.6rem; color: var(--accent); line-height: 1; }
.stat span { color: var(--muted); font-size: .93rem; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.tag {
  font-family: var(--mono); font-size: .78rem; color: var(--muted);
  border: 1px solid var(--line); background: var(--bg-card);
  padding: 5px 11px; border-radius: 999px; transition: all .2s ease;
}
.tag:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

/* ---------- speaking ---------- */
#speaking .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 960px) { #speaking .cards { grid-template-columns: 1fr; } }
.card-links { margin-top: 14px; }

/* ---------- research ---------- */
.pubs { display: grid; gap: 20px; }
.pub {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px; position: relative; overflow: hidden;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.pub::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2)); opacity: 0; transition: opacity .25s ease;
}
.pub:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); box-shadow: var(--shadow); }
.pub:hover::before { opacity: 1; }

.pub-top { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 12px; }
.pill {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted);
}
.pill.year { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); background: var(--accent-soft); }
.pill.venue { color: var(--accent-2); border-color: color-mix(in srgb, var(--accent-2) 35%, transparent); }

.pub h3 { font-size: 1.16rem; margin-bottom: .45em; }
.pub .authors { font-size: .9rem; color: var(--dim); margin-bottom: .7em; }
.pub .authors b { color: var(--text); font-weight: 600; }
.pub p { font-size: .97rem; margin-bottom: 1em; }

.links { display: flex; flex-wrap: wrap; gap: 8px; }
.link-chip {
  display: inline-flex; align-items: center; gap: 7px; font-size: .82rem; font-weight: 600;
  padding: 7px 13px; border-radius: 8px; border: 1px solid var(--line);
  color: var(--muted); background: transparent; transition: all .2s ease;
}
.link-chip:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.link-chip svg { width: 14px; height: 14px; }

/* ---------- projects ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
#work .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 760px) { #work .cards { grid-template-columns: 1fr; } }
.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column; gap: 6px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); box-shadow: var(--shadow); }
.card-logo {
  height: 34px; width: auto; max-width: 170px; margin-bottom: 22px; object-fit: contain;
  object-position: left center; align-self: flex-start;
}
.card-icon {
  width: 52px; height: 52px; border-radius: 12px; margin-bottom: 14px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.1rem; margin-bottom: .3em; }
.card p { font-size: .95rem; margin-bottom: .8em; }
.card .links { margin-top: auto; }

/* ---------- gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 1100px) { .gallery { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 900px) { .gallery { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .gallery { grid-template-columns: 1fr; } }
.shot {
  display: block; width: 100%; margin: 0; border-radius: 10px; overflow: hidden;
  border: 1px solid var(--line); position: relative; cursor: zoom-in;
  background: var(--bg-card); aspect-ratio: 4 / 3;
}
.shot img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease, filter .5s ease; filter: grayscale(35%); }
.shot:hover img { transform: scale(1.045); filter: grayscale(0); }
.shot::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(0,0,0,.45));
  opacity: 0; transition: opacity .35s ease;
}
.shot:hover::after { opacity: 1; }

.lightbox {
  position: fixed; inset: 0; z-index: 200; display: none;
  background: rgba(6, 8, 10, .94); backdrop-filter: blur(6px);
  align-items: center; justify-content: center; padding: 32px;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: min(1100px, 92vw); max-height: 86vh; border-radius: 10px; object-fit: contain; }
.lb-btn {
  position: absolute; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
  color: #fff; width: 46px; height: 46px; border-radius: 50%; cursor: pointer;
  display: grid; place-items: center; font-size: 1.4rem; line-height: 1; transition: background .2s ease;
}
.lb-btn:hover { background: rgba(255,255,255,.18); }
.lb-close { top: 22px; right: 24px; }
.lb-prev { left: 22px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 22px; top: 50%; transform: translateY(-50%); }

/* ---------- contact ---------- */
.contact-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 20px;
  padding: 52px 40px; text-align: center; box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.contact-card::before {
  content: ""; position: absolute; top: -60%; left: 50%; transform: translateX(-50%);
  width: 460px; height: 460px; border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle, var(--accent-soft), transparent 68%);
}
.contact-card > * { position: relative; }
.contact-card h2 { font-size: clamp(1.7rem, 4vw, 2.3rem); }
.contact-card p { max-width: 54ch; margin: 0 auto 26px; }

.email-btn { font-family: var(--mono); font-size: 1rem; letter-spacing: .01em; }
.email-note { font-size: .82rem; color: var(--dim); margin-top: 14px; }

.socials { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 34px; }
.social {
  display: inline-flex; align-items: center; gap: 9px; padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--line); color: var(--muted); font-size: .9rem; font-weight: 500;
  transition: all .2s ease;
}
.social:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); background: var(--accent-soft); }
.social svg { width: 17px; height: 17px; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 34px 0; background: var(--bg-soft); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
footer p { margin: 0; font-size: .88rem; font-family: var(--mono); }
footer .top-link { font-size: .85rem; color: var(--muted); font-family: var(--mono); }
footer .top-link:hover { color: var(--accent); }

/* ---------- publications: show more ---------- */
.pubs-more { margin-top: 20px; }
.pubs-more .btn svg { width: 16px; height: 16px; transition: transform .25s ease; }
.pubs-more .btn.is-open svg { transform: rotate(180deg); }
.nowrap .mono { font-size: .82rem; color: var(--dim); }