/* ==========================================================================
   tranngocquang.com.vn — design tokens
   Dark OLED + engineering HUD. See design-system/tran-ngoc-quang/.
   ========================================================================== */
:root {
  color-scheme: dark;

  --bg: #06070a;
  --bg-2: #0a0c11;
  --surface: #0e1117;
  --surface-2: #141821;
  --line: rgba(255, 255, 255, 0.07);
  --line-2: rgba(255, 255, 255, 0.13);

  --text: #eceff4;
  --text-2: #b9c0cd;
  --muted: #8a93a6;

  --accent: #c6ff3d;        /* signal lime */
  --accent-ink: #0b1100;
  --accent-soft: rgba(198, 255, 61, 0.12);
  --cyan: #52d6ff;
  --violet: #a58bff;
  --gold: #ffcf5c;
  --danger: #ff7a7a;

  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: "DM Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --r-sm: 8px;
  --r: 14px;
  --r-lg: 20px;

  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px;
  --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px;

  --container: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --nav-h: 64px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 160ms;
  --t: 240ms;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.muted { color: var(--muted); }
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }

.icon {
  width: 18px; height: 18px; flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

.skip {
  position: fixed; left: 16px; top: -60px; z-index: 100;
  background: var(--accent); color: var(--accent-ink); padding: 10px 14px; border-radius: var(--r-sm); font-weight: 700;
  transition: top var(--t-fast);
}
.skip:focus { top: 12px; }

/* ambient page background: faint engineering grid */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(82, 214, 255, 0.07), transparent 60%),
    radial-gradient(800px 600px at -10% 40%, rgba(165, 139, 255, 0.05), transparent 60%),
    var(--bg);
}

/* ---------- buttons ---------- */
.btn {
  --h: 48px;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: var(--h); padding: 0 20px;
  border-radius: 999px; border: 1px solid var(--line-2);
  font: 600 15px/1 var(--font-display); letter-spacing: 0.01em;
  transition: transform var(--t-fast) var(--ease-out), background-color var(--t-fast), border-color var(--t-fast), color var(--t-fast), box-shadow var(--t);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn--sm { --h: 40px; padding: 0 16px; font-size: 14px; }
.btn--block { width: 100%; }
.btn--accent { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn--accent:hover { box-shadow: 0 0 0 6px var(--accent-soft), 0 10px 40px -10px rgba(198, 255, 61, 0.55); }
.btn--accent .icon { transition: transform var(--t) var(--ease-out); }
.btn--accent:hover .icon { transform: translate(2px, -2px); }
.btn--ghost { background: rgba(255, 255, 255, 0.02); color: var(--text); }
.btn--ghost:hover { border-color: rgba(255, 255, 255, 0.3); background: rgba(255, 255, 255, 0.05); }
.btn[disabled] { opacity: 0.6; cursor: progress; }

.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px;
  border-radius: 999px; border: 1px solid var(--line-2); color: var(--text);
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.05); }

.kbd-btn {
  display: inline-flex; align-items: center; gap: 6px; height: 40px; padding: 0 12px;
  border-radius: 999px; border: 1px solid var(--line-2); color: var(--text-2);
  font: 500 13px/1 var(--font-mono);
  transition: color var(--t-fast), border-color var(--t-fast);
}
.kbd-btn .icon { width: 14px; height: 14px; }
.kbd-btn:hover { color: var(--text); border-color: rgba(255, 255, 255, 0.3); }

kbd {
  display: inline-grid; place-items: center; min-width: 22px; height: 22px; padding: 0 6px;
  border: 1px solid var(--line-2); border-bottom-width: 2px; border-radius: 6px;
  font: 500 12px/1 var(--font-mono); color: var(--text-2); background: var(--surface);
}

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50; height: var(--nav-h);
  transition: background-color var(--t), border-color var(--t), backdrop-filter var(--t);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(6, 7, 10, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-color: var(--line);
}
.nav__inner { height: 100%; display: flex; align-items: center; gap: var(--s-5); }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 18px/1 var(--font-display); letter-spacing: -0.02em; min-height: 44px; }
.brand__mark {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px;
  background: var(--accent); color: var(--accent-ink);
}
.brand__mark svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; }
.brand__mark circle { fill: currentColor; stroke: none; }
.brand__dim { color: var(--muted); font-weight: 500; }
.nav__links { display: flex; gap: 4px; margin-inline: auto; }
.nav__links a {
  position: relative; padding: 10px 12px; border-radius: 999px;
  font: 500 14px/1 var(--font-body); color: var(--text-2);
  transition: color var(--t-fast), background-color var(--t-fast);
}
.nav__links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.04); }
.nav__links a[aria-current="true"] { color: var(--text); }
.nav__links a[aria-current="true"]::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; width: 4px; height: 4px; margin-left: -2px;
  border-radius: 50%; background: var(--accent);
}
.nav__actions { display: flex; align-items: center; gap: 10px; }
.nav__menu { display: none; }
.mobile-menu {
  display: grid; gap: 2px; padding: 8px var(--gutter) 16px;
  background: rgba(6, 7, 10, 0.96); border-bottom: 1px solid var(--line);
}
.mobile-menu[hidden] { display: none; }
.mobile-menu a { padding: 14px 4px; font: 600 18px/1 var(--font-display); border-bottom: 1px solid var(--line); }

@media (max-width: 960px) {
  .nav__links { display: none; }
  .nav__menu { display: inline-grid; }
  .nav__actions { margin-left: auto; }
}
@media (max-width: 520px) {
  .nav__cta, .kbd-btn { display: none; }
}

/* ---------- hero ---------- */
.hero {
  position: relative; isolation: isolate;
  min-height: 100svh; padding-top: calc(var(--nav-h) + clamp(40px, 8vh, 96px)); padding-bottom: var(--s-7);
  display: flex; flex-direction: column; justify-content: space-between; gap: var(--s-8);
  overflow: hidden;
}
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero__grid {
  position: absolute; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 70% 40%, #000 20%, transparent 75%);
}
.hero__inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); align-items: end; gap: var(--s-6); }
.hero__copy { max-width: 720px; }

.status {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 14px 7px 10px; border-radius: 999px;
  border: 1px solid var(--line-2); background: rgba(14, 17, 23, 0.6);
  font: 500 13px/1.2 var(--font-mono); color: var(--text-2);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.status__dot { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.status__dot::after {
  content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 1px solid var(--accent);
  animation: ping 2.2s var(--ease-out) infinite;
}
@keyframes ping { from { transform: scale(0.6); opacity: 1; } to { transform: scale(1.8); opacity: 0; } }

.hero__title { margin-top: var(--s-5); font-family: var(--font-display); font-weight: 700; letter-spacing: -0.035em; }
.hero__name {
  display: block; font: 500 clamp(15px, 1.4vw, 18px)/1 var(--font-mono); letter-spacing: 0.02em;
  color: var(--accent); margin-bottom: var(--s-4); text-transform: uppercase;
}
.hero__line { display: block; font-size: clamp(40px, 6.6vw, 88px); line-height: 0.98; text-wrap: balance; }
.hero__line em {
  font-style: normal;
  background: linear-gradient(92deg, var(--accent) 0%, var(--cyan) 55%, var(--violet) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lede { margin-top: var(--s-5); max-width: 580px; font-size: clamp(16px, 1.4vw, 19px); line-height: 1.6; color: var(--text-2); }

.hero__lede strong { color: var(--text); font-weight: 700; }

.hero__cta { margin-top: var(--s-6); display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-3); }
.hint { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 6px; color: var(--muted); font-size: 14px; }
.hint:hover { color: var(--text-2); }

.hud {
  justify-self: end; width: min(100%, 300px);
  padding: 14px 16px; border-radius: var(--r);
  border: 1px solid var(--line-2); background: rgba(10, 12, 17, 0.55);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  font: 400 12.5px/1 var(--font-mono);
}
.hud__row { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; border-bottom: 1px dashed var(--line); }
.hud__row:last-child { border-bottom: 0; }
.hud__k { color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; font-size: 11.5px; }
.hud__v { color: var(--text); font-variant-numeric: tabular-nums; }

.metrics {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 12, 17, 0.7), rgba(10, 12, 17, 0.2));
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.metric { padding: var(--s-5) var(--s-5) var(--s-5) 0; display: grid; gap: 6px; }
.metric + .metric { padding-left: var(--s-5); border-left: 1px solid var(--line); }
.metric__v { font: 700 clamp(28px, 3.2vw, 42px)/1 var(--font-display); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.metric__v small { font-size: 0.5em; margin-left: 2px; color: var(--text-2); font-weight: 600; letter-spacing: 0; }
.metric__arrow { color: var(--accent); margin: 0 0.08em; }
.metric__k { font-size: 13.5px; line-height: 1.45; color: var(--muted); }

@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hud { justify-self: start; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric:nth-child(3) { padding-left: 0; border-left: 0; }
  .metric:nth-child(n + 3) { border-top: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .hud { display: none; }
  .hero { gap: var(--s-7); }
}

/* ---------- sections ---------- */
.section { position: relative; padding-block: clamp(72px, 11vw, 140px); }
.section--tight { padding-block: clamp(56px, 8vw, 96px); }
.section + .section { border-top: 1px solid var(--line); }
.section__head { margin-bottom: clamp(32px, 5vw, 64px); max-width: 860px; }
.section__head--split { max-width: none; display: flex; align-items: end; justify-content: space-between; gap: var(--s-5); flex-wrap: wrap; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: var(--s-4);
  font: 500 13px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-2);
}
.eyebrow span { color: var(--accent); }
.eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--accent); order: -1; }
.section__title { font: 700 clamp(30px, 4.2vw, 56px)/1.05 var(--font-display); letter-spacing: -0.03em; text-wrap: balance; }
.section__title em { font-style: normal; color: var(--accent); }
.section__sub { margin-top: var(--s-4); color: var(--text-2); font-size: 17px; max-width: 620px; }

/* ---------- about ---------- */
.about { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
.about__text { display: grid; gap: var(--s-4); font-size: 18px; line-height: 1.7; color: var(--text-2); }
.about__text strong { color: var(--text); font-weight: 700; }
.pillars { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.pillar { background: var(--bg-2); padding: var(--s-5); display: grid; gap: var(--s-3); align-content: start; transition: background-color var(--t); }
.pillar:hover { background: var(--surface); }
.pillar__icon { width: 26px; height: 26px; color: var(--accent); stroke-width: 1.6; }
.pillar h3 { font: 600 19px/1.2 var(--font-display); letter-spacing: -0.01em; }
.pillar p { font-size: 15px; color: var(--muted); line-height: 1.6; }
@media (max-width: 960px) { .about { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .pillars { grid-template-columns: 1fr; } }

/* ---------- work ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  min-height: 40px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line-2);
  font: 500 14px/1 var(--font-body); color: var(--text-2);
  transition: background-color var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.chip:hover { color: var(--text); border-color: rgba(255, 255, 255, 0.3); }
.chip[aria-pressed="true"] { background: var(--text); color: var(--bg); border-color: var(--text); }

.bento { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-4); }
.card {
  position: relative; display: flex; flex-direction: column;
  border-radius: var(--r-lg); border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  overflow: hidden;
  transition: border-color var(--t), transform var(--t) var(--ease-out), box-shadow var(--t);
}
.card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity var(--t);
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(198, 255, 61, 0.08), transparent 45%);
}
.card:hover { border-color: var(--line-2); transform: translateY(-3px); box-shadow: 0 24px 60px -30px rgba(0, 0, 0, 0.9); }
.card:hover::before { opacity: 1; }
.card[hidden] { display: none; }
.card--xl { grid-column: span 3; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); }
.card--lg { grid-column: span 3; }
.card__body { position: relative; display: flex; flex-direction: column; gap: var(--s-3); padding: clamp(20px, 2.4vw, 32px); flex: 1; }
.card__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.card__title { font: 600 clamp(20px, 1.9vw, 26px)/1.2 var(--font-display); letter-spacing: -0.02em; text-wrap: balance; }
.card--xl .card__title { font-size: clamp(24px, 2.6vw, 34px); }
.card__desc { color: var(--text-2); font-size: 15.5px; line-height: 1.6; }
.card__desc strong { color: var(--accent); font-weight: 700; }
.card__list { display: grid; gap: 8px; padding: 0; list-style: none; font-size: 14.5px; color: var(--muted); }
.card__list li { position: relative; padding-left: 18px; }
.card__list li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 8px; height: 1px; background: var(--accent); }
.card__foot { margin-top: auto; padding-top: var(--s-4); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s-3); }
.card__visual { position: relative; min-height: 320px; border-right: 1px solid var(--line); background: radial-gradient(circle at 50% 55%, rgba(82, 214, 255, 0.08), transparent 65%), #05060a; }
.card__visual canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.card__visual::after {
  content: "novel-view synthesis · orbit"; position: absolute; left: 16px; bottom: 14px;
  font: 400 11.5px/1 var(--font-mono); color: var(--muted); letter-spacing: 0.06em; text-transform: uppercase;
}

.tag, .badge {
  display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px; border-radius: 999px;
  font: 500 12px/1 var(--font-mono); letter-spacing: 0.02em; white-space: nowrap;
}
.tag { border: 1px solid var(--line-2); color: var(--text-2); }
.badge--gold { background: rgba(255, 207, 92, 0.12); color: var(--gold); border: 1px solid rgba(255, 207, 92, 0.3); }
.badge .icon { width: 14px; height: 14px; }

.stack { display: flex; flex-wrap: wrap; gap: 6px; }
.stack li {
  padding: 5px 9px; border-radius: 6px; background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line);
  font: 400 12.5px/1.2 var(--font-mono); color: var(--text-2);
}
.private { display: inline-flex; align-items: center; gap: 6px; font: 400 12.5px/1 var(--font-mono); color: var(--muted); }
.private .icon { width: 14px; height: 14px; }
.links { display: inline-flex; gap: 16px; }
.link {
  display: inline-flex; align-items: center; gap: 4px; min-height: 44px;
  font: 600 14px/1 var(--font-display); color: var(--text);
  transition: color var(--t-fast);
}
.link .icon { width: 16px; height: 16px; transition: transform var(--t) var(--ease-out); }
.link:hover { color: var(--accent); }
.link:hover .icon { transform: translate(2px, -2px); }

.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; margin-block: var(--s-2); }
.kpis div { background: var(--bg-2); padding: 14px 16px; display: flex; flex-direction: column-reverse; gap: 6px; }
.kpis dt { font: 400 12px/1.3 var(--font-mono); color: var(--muted); }
.kpis dd { font: 700 clamp(22px, 2.4vw, 30px)/1 var(--font-display); letter-spacing: -0.02em; color: var(--text); font-variant-numeric: tabular-nums; }

@media (min-width: 961px) {
  .card--lg { display: grid; }
  .card--lg .card__body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); column-gap: var(--s-7); align-content: start; }
  .card--lg .card__meta, .card--lg .card__title, .card--lg .card__desc { grid-column: 1; }
  .card--lg .kpis { grid-column: 2; grid-row: 1 / span 3; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; }
  .card--lg .card__list { grid-column: 1; }
  .card--lg .card__foot { grid-column: 2; align-self: end; }
}
@media (max-width: 960px) {
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card--xl, .card--lg { grid-column: span 2; }
  .card--xl { grid-template-columns: 1fr; }
  .card__visual { min-height: 260px; border-right: 0; border-bottom: 1px solid var(--line); }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .bento { grid-template-columns: 1fr; }
  .card--xl, .card--lg { grid-column: auto; }
}

/* ---------- timeline ---------- */
.timeline { position: relative; display: grid; gap: 0; }
.tl { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: var(--s-6); padding: var(--s-6) 0; border-top: 1px solid var(--line); }
.tl:last-child { border-bottom: 1px solid var(--line); }
.tl__when { font: 500 13.5px/1.6 var(--font-mono); color: var(--muted); padding-top: 4px; font-variant-numeric: tabular-nums; }
.tl__body { display: grid; gap: 8px; max-width: 780px; }
.tl__body h3 { font: 600 clamp(20px, 2vw, 24px)/1.25 var(--font-display); letter-spacing: -0.015em; }
.tl__at { color: var(--accent); font-weight: 500; }
.tl__where { font: 400 13.5px/1.4 var(--font-mono); color: var(--muted); }
.tl__body p:last-child { color: var(--text-2); }
.tl--edu .tl__at { color: var(--cyan); }
.tl { transition: background-color var(--t); }
@media (max-width: 720px) { .tl { grid-template-columns: 1fr; gap: var(--s-3); } }

/* ---------- pipeline ---------- */
.pipeline { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--s-3); counter-reset: stage; }
.stage {
  position: relative; padding: var(--s-5); border-radius: var(--r-lg); border: 1px solid var(--line);
  background: var(--bg-2); display: grid; gap: var(--s-3); align-content: start;
}
.stage:not(:last-child)::after {
  content: ""; position: absolute; top: 38px; right: calc(-1 * var(--s-3) - 1px); width: var(--s-3); height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.stage__n { font: 500 12px/1 var(--font-mono); color: var(--accent); letter-spacing: 0.08em; }
.stage__t { font: 600 22px/1 var(--font-display); letter-spacing: -0.02em; }
@media (max-width: 1100px) { .pipeline { grid-template-columns: repeat(3, minmax(0, 1fr)); } .stage::after { display: none; } }
@media (max-width: 720px) { .pipeline { grid-template-columns: 1fr; } }

/* ---------- honors ---------- */
.honors { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.awards { display: grid; }
.award { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: var(--s-4); padding: var(--s-5) 0; border-top: 1px solid var(--line); }
.award:last-child { border-bottom: 1px solid var(--line); }
.award__year { font: 500 14px/1.6 var(--font-mono); color: var(--accent); }
.award h3 { font: 600 20px/1.3 var(--font-display); letter-spacing: -0.01em; }
.award p { margin-top: 4px; color: var(--text-2); font-size: 15px; }
.creds { padding: var(--s-5); border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--bg-2); display: grid; gap: var(--s-3); }
.creds__t { font: 500 12.5px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.creds__t:not(:first-child) { margin-top: var(--s-4); }
.creds ul { display: grid; gap: 10px; font-size: 15px; color: var(--text-2); }
.langs li { display: flex; justify-content: space-between; gap: 12px; padding-bottom: 10px; border-bottom: 1px dashed var(--line); }
.langs li:last-child { border-bottom: 0; padding-bottom: 0; }
.langs .muted { font: 400 13px/1.6 var(--font-mono); }
@media (max-width: 900px) { .honors { grid-template-columns: 1fr; } }

/* ---------- github ---------- */
.repos { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-3); }
.repo {
  display: flex; flex-direction: column; gap: 10px; min-height: 150px; padding: var(--s-5);
  border-radius: var(--r); border: 1px solid var(--line); background: var(--bg-2);
  transition: border-color var(--t), background-color var(--t);
}
a.repo:hover { border-color: var(--line-2); background: var(--surface); }
.repo__name { font: 500 15px/1.3 var(--font-mono); color: var(--text); word-break: break-word; }
.repo__desc { font-size: 14px; color: var(--muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.repo__meta { margin-top: auto; display: flex; flex-wrap: wrap; gap: 14px; font: 400 12.5px/1 var(--font-mono); color: var(--muted); }
.repo__meta span { display: inline-flex; align-items: center; gap: 6px; }
.repo__lang::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--dot, var(--muted)); }
.repo--skeleton {
  background: linear-gradient(90deg, var(--bg-2) 25%, var(--surface) 50%, var(--bg-2) 75%);
  background-size: 200% 100%; animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }
.repos__empty { grid-column: 1 / -1; color: var(--muted); font-size: 15px; }
@media (max-width: 900px) { .repos { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .repos { grid-template-columns: 1fr; } }

/* ---------- contact ---------- */
.contact { overflow: hidden; }
.contact::before {
  content: ""; position: absolute; inset: auto -20% -60% -20%; height: 90%; pointer-events: none; z-index: -1;
  background: radial-gradient(closest-side, rgba(198, 255, 61, 0.08), transparent);
}
.contact__inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
.socials { display: grid; gap: 8px; margin-top: var(--s-6); }
.social {
  width: 100%; display: flex; align-items: center; gap: 14px; min-height: 56px; padding: 0 18px;
  border-radius: var(--r); border: 1px solid var(--line); background: var(--bg-2);
  font: 500 15px/1.2 var(--font-mono); color: var(--text-2); text-align: left;
  transition: border-color var(--t-fast), color var(--t-fast), background-color var(--t-fast);
}
.social > span:not(.sr-only) { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.social:hover { color: var(--text); border-color: var(--line-2); background: var(--surface); }
.social .icon { color: var(--accent); }
.social__end { margin-left: auto; color: var(--muted) !important; width: 16px; height: 16px; }

.form {
  padding: clamp(20px, 3vw, 32px); border-radius: var(--r-lg); border: 1px solid var(--line-2);
  background: linear-gradient(180deg, var(--surface), var(--bg-2)); display: grid; gap: var(--s-4);
}
.form__head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.form__head h3 { font: 600 22px/1.2 var(--font-display); }
.form__route { font: 400 12px/1 var(--font-mono); color: var(--muted); }
.field { display: grid; gap: 6px; }
.field label { font: 500 14px/1.2 var(--font-body); color: var(--text); }
.field input, .field textarea {
  width: 100%; min-height: 48px; padding: 12px 14px; border-radius: var(--r-sm);
  background: var(--bg); border: 1px solid var(--line-2); color: var(--text); font-size: 16px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.field textarea { resize: vertical; min-height: 132px; line-height: 1.5; }
.field input:hover, .field textarea:hover { border-color: rgba(255, 255, 255, 0.24); }
.field input:focus-visible, .field textarea:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.field [aria-invalid="true"] { border-color: var(--danger); }
.field__help { font-size: 13.5px; color: var(--muted); }
.field__error { font-size: 13.5px; color: var(--danger); min-height: 0; }
.field__error:empty { display: none; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__summary { padding: 14px 16px; border-radius: var(--r-sm); border: 1px solid rgba(255, 122, 122, 0.4); background: rgba(255, 122, 122, 0.08); font-size: 14.5px; }
.form__summary strong { display: block; margin-bottom: 4px; }
.form__summary a { color: var(--danger); text-decoration: underline; text-underline-offset: 3px; }
.form__status { font-size: 14.5px; min-height: 1.4em; color: var(--text-2); }
.form__status.is-ok { color: var(--accent); }
.form__status.is-err { color: var(--danger); }
@media (max-width: 900px) { .contact__inner { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: var(--s-6) 0 calc(var(--s-6) + env(safe-area-inset-bottom)); }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-3) var(--s-5); font-size: 14px; color: var(--muted); }
.footer__tele { display: flex; flex-wrap: wrap; gap: var(--s-5); font: 400 13px/1 var(--font-mono); }
.footer__tele > span { display: inline-flex; align-items: center; gap: 8px; }
.footer__tele .icon { width: 14px; height: 14px; color: var(--accent); }

/* ---------- command palette ---------- */
.cmdk {
  width: min(640px, calc(100vw - 32px)); max-height: min(520px, calc(100svh - 120px));
  margin: 12vh auto auto; padding: 0; border: 0; background: transparent; color: var(--text);
}
.cmdk::backdrop { background: rgba(3, 4, 6, 0.7); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.cmdk[open] .cmdk__box { animation: pop 200ms var(--ease-out); }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(0.98); } }
.cmdk__box { border-radius: var(--r-lg); border: 1px solid var(--line-2); background: var(--surface); box-shadow: 0 40px 120px -20px #000; overflow: hidden; }
.cmdk__search { display: flex; align-items: center; gap: 12px; padding: 0 16px; border-bottom: 1px solid var(--line); }
.cmdk__search .icon { color: var(--muted); }
.cmdk__search input { flex: 1; min-width: 0; height: 58px; background: transparent; border: 0; outline: 0; font-size: 16px; }
.cmdk__search input::placeholder { color: var(--muted); }
.cmdk__list { list-style: none; margin: 0; padding: 8px; max-height: 380px; overflow-y: auto; }
.cmdk__group { padding: 10px 10px 6px; font: 500 11.5px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.cmdk__item { display: flex; align-items: center; gap: 12px; min-height: 44px; padding: 0 12px; border-radius: 10px; cursor: pointer; color: var(--text-2); }
.cmdk__item .icon { width: 16px; height: 16px; color: var(--muted); }
.cmdk__item kbd { margin-left: auto; }
.cmdk__item[aria-selected="true"] { background: rgba(255, 255, 255, 0.06); color: var(--text); }
.cmdk__item[aria-selected="true"] .icon { color: var(--accent); }
.cmdk__empty { padding: 24px 12px; color: var(--muted); text-align: center; }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 80; transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  padding: 12px 18px; border-radius: 999px; background: var(--text); color: var(--bg); font: 600 14px/1 var(--font-body);
  transition: opacity var(--t), transform var(--t) var(--ease-out);
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); transition-delay: var(--d, 0ms); }
.js .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .js .reveal { opacity: 1; transform: none; }
  .card:hover { transform: none; }
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.notfound { min-height: 100svh; display: grid; place-content: center; gap: 24px; }

@media (hover: none), (max-width: 720px) { .hint { display: none; } }

.about__vi { padding: var(--s-4) var(--s-5); border-left: 2px solid var(--accent); background: var(--bg-2); border-radius: 0 var(--r-sm) var(--r-sm) 0; font-size: 16px; }
.about__vi-k { display: block; margin-bottom: 6px; font: 500 12px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }

/* ---------- language switch, footer links ---------- */
.lang-btn {
  display: inline-grid; place-items: center; min-width: 44px; height: 40px; padding: 0 10px;
  border-radius: 999px; border: 1px solid var(--line-2); color: var(--text-2);
  font: 500 13px/1 var(--font-mono); transition: color var(--t-fast), border-color var(--t-fast);
}
.lang-btn:hover { color: var(--text); border-color: rgba(255, 255, 255, 0.3); }
.footer__links { display: flex; flex-wrap: wrap; gap: 8px 20px; width: 100%; order: -1; padding-bottom: var(--s-3); }
.footer__links a { color: var(--text-2); min-height: 32px; display: inline-flex; align-items: center; }
.footer__links a:hover { color: var(--accent); }
.card__foot .link + .link, .card__foot .links + .link { margin-left: 4px; }

/* ---------- sub pages ---------- */
.page { padding-top: calc(var(--nav-h) + clamp(32px, 6vw, 72px)); padding-bottom: var(--s-9); }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0 0 var(--s-5); font: 400 13px/1.4 var(--font-mono); color: var(--muted); }
.crumbs li + li::before { content: "/"; margin-right: 6px; color: var(--line-2); }
.crumbs a { color: var(--text-2); }
.crumbs a:hover { color: var(--accent); }
.page__head { max-width: 900px; display: grid; gap: var(--s-4); }
.page__title { font: 700 clamp(34px, 5.4vw, 68px)/1.02 var(--font-display); letter-spacing: -0.035em; text-wrap: balance; }
.page__lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--text-2); line-height: 1.6; max-width: 760px; }
.page__meta { display: flex; flex-wrap: wrap; gap: 8px; }
.page__kpis { margin: clamp(32px, 5vw, 56px) 0; }
.page__grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: clamp(32px, 5vw, 72px); align-items: start; }
.prose { display: grid; gap: var(--s-5); max-width: 760px; }
.prose h2 { font: 600 clamp(22px, 2.4vw, 30px)/1.2 var(--font-display); letter-spacing: -0.02em; margin-top: var(--s-5); }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--text-2); font-size: 17px; line-height: 1.75; }
.prose strong { color: var(--text); }
.prose ul { display: grid; gap: 10px; padding-left: 0; list-style: none; }
.prose ul li { position: relative; padding-left: 22px; }
.prose ul li::before { content: ""; position: absolute; left: 0; top: 0.85em; width: 10px; height: 1px; background: var(--accent); }
.prose code { font: 400 0.9em var(--font-mono); background: rgba(255, 255, 255, 0.06); padding: 1px 6px; border-radius: 4px; color: var(--text); }
.page__aside { position: sticky; top: calc(var(--nav-h) + 24px); display: grid; gap: var(--s-4); }
.panel { padding: var(--s-5); border-radius: var(--r-lg); border: 1px solid var(--line); background: var(--bg-2); display: grid; gap: var(--s-3); }
.panel__t { font: 500 12.5px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.panel--cta { border-color: rgba(198, 255, 61, 0.35); background: linear-gradient(180deg, rgba(198, 255, 61, 0.06), var(--bg-2)); }
.panel--cta p { color: var(--text-2); font-size: 15px; }
.related { margin-top: clamp(56px, 8vw, 96px); padding-top: var(--s-7); border-top: 1px solid var(--line); }
.related__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--s-3); margin-top: var(--s-5); }
.related a.repo { min-height: 120px; }
@media (max-width: 960px) { .page__grid { grid-template-columns: 1fr; } .page__aside { position: static; } }

/* resume */
.resume { max-width: 900px; }
.resume__section { padding: var(--s-6) 0; border-top: 1px solid var(--line); display: grid; gap: var(--s-4); }
.resume__section > h2 { font: 500 13px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.resume__item { display: grid; gap: 6px; }
.resume__item + .resume__item { margin-top: var(--s-4); }
.resume__row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; align-items: baseline; }
.resume__row h3 { font: 600 19px/1.3 var(--font-display); }
.resume__when { font: 400 13.5px/1.4 var(--font-mono); color: var(--muted); }
.resume__sub { color: var(--text-2); font-size: 15px; }
.resume__item ul { display: grid; gap: 6px; padding-left: 18px; margin: 4px 0 0; color: var(--text-2); font-size: 15.5px; line-height: 1.6; }
.resume__skills { display: grid; grid-template-columns: 160px minmax(0, 1fr); gap: 8px 16px; font-size: 15.5px; }
.resume__skills dt { font: 500 13.5px/1.6 var(--font-mono); color: var(--muted); }
.resume__skills dd { color: var(--text-2); }
.resume__contact { display: flex; flex-wrap: wrap; gap: 8px 20px; font: 400 14px/1.4 var(--font-mono); color: var(--text-2); }
.resume__contact a:hover { color: var(--accent); }
@media (max-width: 600px) { .resume__skills { grid-template-columns: 1fr; gap: 2px; } .resume__skills dd { margin-bottom: 10px; } }
@media print {
  body { background: #fff; color: #111; }
  body::before, .nav, .footer, .cmdk, .toast, .skip, .no-print, .crumbs { display: none !important; }
  .page { padding: 0; }
  .page__title, .resume__row h3 { color: #111; }
  .page__lead, .resume__sub, .resume__item ul, .resume__skills dd, .resume__contact { color: #333; }
  .resume__section { border-color: #ddd; padding: 14px 0; break-inside: avoid; }
  .resume__section > h2 { color: #111; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
}