/* ==========================================================================
   Mahdi Farhadi — Portfolio
   "Perception System Readout" — instrument HUD for autonomous-driving work
   Archivo (display) · Hanken Grotesk (body) · JetBrains Mono (telemetry)
   ========================================================================== */

/* ----------------------------------------------------- tokens : dark (default) */
:root {
  --bg:        #0A1417;
  --bg-2:      #0C1A1E;
  --surface:   #101F23;
  --surface-2: #16292E;
  --line:        rgba(255,255,255,.09);
  --line-strong: rgba(46,216,195,.28);
  --ink:      #E8F1F0;
  --ink-soft: #B4C4C3;
  --ink-mute: #7E938F;
  --accent:     #2ED8C3;
  --accent-2:   #29B7D6;
  --accent-dim: rgba(46,216,195,.14);
  --accent-ink: #04140F;
  --amber:      #F5A623;
  --glow:       rgba(46,216,195,.45);
  --shadow:     0 24px 60px -28px rgba(0,0,0,.75);

  --font-display: 'Archivo', system-ui, sans-serif;
  --font-body:    'Hanken Grotesk', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', monospace;

  --wrap: 1180px;
  --pad: clamp(1.15rem, 4.5vw, 3rem);
  --sect: clamp(4.5rem, 9vw, 8rem);
  --radius: 4px;
  --nav-h: 68px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:        #F2F7F5;
    --bg-2:      #E9F1EE;
    --surface:   #FFFFFF;
    --surface-2: #EDF4F1;
    --line:        rgba(11,28,30,.11);
    --line-strong: rgba(14,124,111,.30);
    --ink:      #0B1B1E;
    --ink-soft: #33484A;
    --ink-mute: #5E7472;
    --accent:     #0E7C6F;
    --accent-2:   #0B6F8A;
    --accent-dim: rgba(14,124,111,.10);
    --accent-ink: #FFFFFF;
    --amber:      #B96E0C;
    --glow:       rgba(14,124,111,.22);
    --shadow:     0 22px 50px -30px rgba(11,40,42,.4);
  }
}

/* explicit toggle overrides (must win over media query in both directions) */
:root[data-theme="dark"] {
  --bg:#0A1417; --bg-2:#0C1A1E; --surface:#101F23; --surface-2:#16292E;
  --line:rgba(255,255,255,.09); --line-strong:rgba(46,216,195,.28);
  --ink:#E8F1F0; --ink-soft:#B4C4C3; --ink-mute:#7E938F;
  --accent:#2ED8C3; --accent-2:#29B7D6; --accent-dim:rgba(46,216,195,.14);
  --accent-ink:#04140F; --amber:#F5A623; --glow:rgba(46,216,195,.45);
  --shadow:0 24px 60px -28px rgba(0,0,0,.75);
}
:root[data-theme="light"] {
  --bg:#F2F7F5; --bg-2:#E9F1EE; --surface:#FFFFFF; --surface-2:#EDF4F1;
  --line:rgba(11,28,30,.11); --line-strong:rgba(14,124,111,.30);
  --ink:#0B1B1E; --ink-soft:#33484A; --ink-mute:#5E7472;
  --accent:#0E7C6F; --accent-2:#0B6F8A; --accent-dim:rgba(14,124,111,.10);
  --accent-ink:#FFFFFF; --amber:#B96E0C; --glow:rgba(14,124,111,.22);
  --shadow:0 22px 50px -30px rgba(11,40,42,.4);
}

/* ----------------------------------------------------- reset / base */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.4vw + 0.95rem, 1.06rem);
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, video, canvas { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
strong { color: var(--ink); font-weight: 600; }
em { font-style: italic; color: var(--ink); }
::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: fixed; top: -60px; left: 12px; z-index: 200;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; border-radius: var(--radius); font-family: var(--font-mono);
  font-size: .8rem; transition: top .2s;
}
.skip-link:focus { top: 12px; }

.wrap { width: min(100% - 2 * var(--pad), var(--wrap)); margin-inline: auto; }

.mono { font-family: var(--font-mono); font-weight: 500; letter-spacing: .04em; }

/* ----------------------------------------------------- eyebrow / section head */
.eyebrow {
  display: inline-flex; align-items: center; gap: .6em;
  font-family: var(--font-mono); font-size: .74rem; font-weight: 500;
  letter-spacing: .18em; text-transform: uppercase; color: var(--accent);
}
.eyebrow .mono { color: var(--ink-mute); }
.eyebrow__sep { color: var(--ink-mute); margin: 0 .1em; }
.eyebrow__dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 var(--glow); animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 var(--glow); }
  70%  { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.section { padding-block: var(--sect); position: relative; }
.section__head { max-width: 720px; margin-bottom: clamp(2.4rem, 5vw, 3.8rem); }
.section__head .eyebrow { margin-bottom: 1rem; }
.section__title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.9rem, 1rem + 3.4vw, 3.1rem);
  line-height: 1.04; letter-spacing: -.02em; color: var(--ink);
  text-wrap: balance;
}

/* ----------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; gap: .55em;
  font-family: var(--font-mono); font-size: .82rem; font-weight: 500;
  letter-spacing: .03em; padding: .78em 1.3em; border-radius: var(--radius);
  border: 1px solid transparent; transition: transform .18s, background .2s, border-color .2s, color .2s;
  white-space: nowrap;
}
.btn svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.btn--solid { background: var(--accent); color: var(--accent-ink); box-shadow: 0 8px 24px -10px var(--glow); }
.btn--solid:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -10px var(--glow); }
.btn--ghost { border-color: var(--line-strong); color: var(--ink); background: var(--accent-dim); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn--text { color: var(--ink-soft); padding-inline: .4em; }
.btn--text:hover { color: var(--accent); }
.btn--lg { font-size: .92rem; padding: 1em 1.6em; }

/* ----------------------------------------------------- nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--nav-h);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
.nav.is-scrolled { border-bottom-color: var(--line); background: color-mix(in srgb, var(--bg) 88%, transparent); }
.nav__inner {
  height: 100%; width: min(100% - 2 * var(--pad), 1320px); margin-inline: auto;
  display: flex; align-items: center; gap: 1.5rem;
}
.nav__brand { display: flex; align-items: center; gap: .6rem; color: var(--ink); font-weight: 700; }
.nav__monogram {
  font-family: var(--font-mono); font-weight: 600; font-size: .82rem; letter-spacing: .05em;
  color: var(--accent); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: .34em .5em; line-height: 1; background: var(--accent-dim);
}
.nav__name { font-family: var(--font-display); font-size: .98rem; letter-spacing: -.01em; }
.nav__links { display: flex; gap: 1.55rem; margin-inline: auto; }
.nav__links a {
  position: relative; color: var(--ink-soft); font-size: .9rem; font-weight: 500;
  padding: .3em 0; transition: color .2s;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 100%; height: 1.5px;
  background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .28s;
}
.nav__links a:hover, .nav__links a.is-active { color: var(--ink); }
.nav__links a:hover::after, .nav__links a.is-active::after { transform: scaleX(1); }
.nav__actions { display: flex; align-items: center; gap: .7rem; }
.nav__resume svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.theme-toggle {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: var(--radius);
  border: 1px solid var(--line); color: var(--ink-soft); transition: color .2s, border-color .2s, transform .2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.theme-toggle svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.theme-toggle__moon { display: none; }
:root[data-theme="light"] .theme-toggle__sun { display: none; }
:root[data-theme="light"] .theme-toggle__moon { display: block; }

.nav__burger { display: none; width: 40px; height: 40px; flex-direction: column; justify-content: center; gap: 5px; padding: 0 8px; }
.nav__burger span { height: 2px; background: var(--ink); border-radius: 2px; transition: transform .3s, opacity .2s; }
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__scanline {
  position: absolute; left: 0; bottom: -1px; height: 1px; width: 100%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .5; animation: scan 6s linear infinite; transform-origin: left;
}
@keyframes scan { 0% { transform: translateX(-100%) scaleX(.35); } 100% { transform: translateX(200%) scaleX(.35); } }

/* ----------------------------------------------------- hero */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  padding-top: var(--nav-h); overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero__grid {
  position: absolute; inset: 0; z-index: 1; 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(120% 90% at 20% 20%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(120% 90% at 20% 20%, #000 0%, transparent 75%);
  opacity: .5;
}
.hero__vignette {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background:
    radial-gradient(90% 70% at 78% 40%, transparent 30%, var(--bg) 100%),
    linear-gradient(180deg, transparent 55%, var(--bg) 100%);
}
.hero__inner { position: relative; z-index: 3; width: min(100% - 2 * var(--pad), var(--wrap)); margin-inline: auto; padding-block: 5vh; }
.hero__eyebrow { font-size: .8rem; margin-bottom: 1.7rem; }
.hero__title {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(3.6rem, 1rem + 13vw, 9.5rem);
  line-height: .9; letter-spacing: -.035em; color: var(--ink);
  text-shadow: 0 0 60px color-mix(in srgb, var(--bg) 60%, transparent);
}
.hero__lede {
  max-width: 40ch; margin-top: 1.8rem; font-size: clamp(1.05rem, .5vw + 1rem, 1.3rem);
  line-height: 1.6; color: var(--ink-soft);
}
.hero__lede em { color: var(--accent); font-style: normal; font-weight: 600; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2.2rem; align-items: center; }
.hero__meta {
  display: flex; flex-wrap: wrap; gap: 1.6rem; margin-top: 2.6rem;
  font-size: .85rem; color: var(--ink-soft);
}
.hero__meta li { display: flex; align-items: baseline; gap: .55rem; }
.hero__meta .mono { color: var(--ink-mute); font-size: .68rem; letter-spacing: .12em; }
.hero__socials { display: flex; gap: .4rem; margin-top: 2rem; }
.hero__socials a {
  display: grid; place-items: center; width: 42px; height: 42px; border-radius: var(--radius);
  border: 1px solid var(--line); color: var(--ink-soft); transition: color .2s, border-color .2s, transform .2s, background .2s;
}
.hero__socials a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-3px); background: var(--accent-dim); }
.hero__socials svg[stroke] { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.hero__scroll {
  position: absolute; left: 50%; bottom: 1.6rem; transform: translateX(-50%); z-index: 3;
  display: flex; flex-direction: column; align-items: center; gap: .6rem;
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .28em; color: var(--ink-mute);
}
.hero__scroll-track { width: 20px; height: 32px; border: 1.5px solid var(--line-strong); border-radius: 12px; display: flex; justify-content: center; padding-top: 5px; }
.hero__scroll-dot { width: 3px; height: 7px; border-radius: 2px; background: var(--accent); animation: scrolldot 1.8s ease-in-out infinite; }
@keyframes scrolldot { 0%,100% { transform: translateY(0); opacity: 1; } 60% { transform: translateY(11px); opacity: .2; } }

/* ----------------------------------------------------- ticker */
.ticker {
  border-block: 1px solid var(--line); background: var(--bg-2); overflow: hidden;
  padding-block: .85rem; position: relative;
}
.ticker__track {
  display: flex; align-items: center; gap: 1.4rem; width: max-content;
  font-family: var(--font-mono); font-size: .82rem; letter-spacing: .04em;
  color: var(--ink-mute); animation: marquee 42s linear infinite; white-space: nowrap;
}
.ticker__track span { color: var(--ink-soft); }
.ticker__track i { color: var(--accent); font-style: normal; font-size: .6rem; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.ticker:hover .ticker__track { animation-play-state: paused; }

/* ----------------------------------------------------- about */
.about__grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.about__lede p { font-size: clamp(1.05rem, .5vw + 1rem, 1.24rem); line-height: 1.66; color: var(--ink-soft); }
.about__lede p + p { margin-top: 1.2rem; }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--surface); padding: 1.5rem 1.35rem; display: flex; flex-direction: column; gap: .5rem; }
.stat__num {
  font-family: var(--font-display); font-weight: 800; font-size: clamp(2.2rem, 4vw, 3rem);
  line-height: 1; color: var(--accent); font-variant-numeric: tabular-nums; letter-spacing: -.02em;
}
.stat__label { font-size: .82rem; line-height: 1.35; color: var(--ink-mute); }

.interests { margin-top: clamp(2.6rem, 5vw, 4rem); border-top: 1px solid var(--line); padding-top: 2rem; }
.interests__label { font-size: .72rem; letter-spacing: .18em; color: var(--ink-mute); margin-bottom: 1.1rem; }
.chips { display: flex; flex-wrap: wrap; gap: .6rem; }
.chips li {
  font-size: .84rem; padding: .5em .95em; border: 1px solid var(--line); border-radius: 100px;
  color: var(--ink-soft); background: var(--surface); transition: color .2s, border-color .2s, background .2s, transform .2s;
}
.chips li:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); transform: translateY(-2px); }

/* ----------------------------------------------------- timeline */
.timeline { position: relative; display: flex; flex-direction: column; gap: 2.4rem; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 1px; background: var(--line); }
.tl { position: relative; display: grid; grid-template-columns: 200px 1fr; gap: 2.2rem; padding-left: 2.4rem; }
.tl::before {
  content: ""; position: absolute; left: 3px; top: 8px; width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent); box-shadow: 0 0 0 4px var(--bg), 0 0 14px -2px var(--glow);
}
.tl__time { padding-top: 2px; }
.tl__time .mono { font-size: .78rem; color: var(--ink-mute); letter-spacing: .06em; }
.tl__role { font-family: var(--font-display); font-weight: 700; font-size: 1.24rem; color: var(--ink); letter-spacing: -.01em; display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; }
.tl__lvl {
  font-family: var(--font-mono); font-size: .62rem; font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent); border: 1px solid var(--line-strong); border-radius: 100px; padding: .25em .7em; background: var(--accent-dim);
}
.tl__org { font-size: .95rem; color: var(--ink-soft); margin-top: .3rem; font-weight: 500; }
.tl__loc { color: var(--ink-mute); font-weight: 400; }
.tl__points { margin-top: .95rem; display: flex; flex-direction: column; gap: .5rem; }
.tl__points li { position: relative; padding-left: 1.25rem; font-size: .95rem; line-height: 1.55; }
.tl__points li::before { content: ""; position: absolute; left: 0; top: .62em; width: 6px; height: 1.5px; background: var(--accent); }

/* ----------------------------------------------------- projects / cases */
.projects { padding-bottom: calc(var(--sect) * .6); }
.case { margin-top: clamp(3.5rem, 7vw, 6rem); }
.case:first-of-type { margin-top: 0; }

.case__head { display: flex; gap: 1.1rem; align-items: baseline; margin-bottom: 1.1rem; }
.case__id {
  font-size: .78rem; color: var(--accent); border: 1px solid var(--line-strong);
  border-radius: var(--radius); padding: .3em .55em; background: var(--accent-dim); flex-shrink: 0; letter-spacing: .08em;
}
.case__title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.4rem, 1rem + 1.6vw, 2.05rem); line-height: 1.08; letter-spacing: -.015em; color: var(--ink); text-wrap: balance; }
.case__meta { font-size: .76rem; color: var(--ink-mute); margin-top: .45rem; letter-spacing: .05em; }
.case__desc { max-width: 66ch; font-size: 1.04rem; line-height: 1.62; color: var(--ink-soft); }
.case__note { font-size: .72rem; color: var(--ink-mute); margin-top: 1.1rem; letter-spacing: .04em; }

.tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.3rem; }
.tags li {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .03em; padding: .4em .75em;
  border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink-mute); background: var(--surface);
}

/* frame + corner ticks */
.frame { position: relative; }
.frame__tick { position: absolute; width: 14px; height: 14px; z-index: 4; pointer-events: none; opacity: .85; }
.frame__tick--tl { top: -1px; left: -1px; border-top: 2px solid var(--accent); border-left: 2px solid var(--accent); }
.frame__tick--tr { top: -1px; right: -1px; border-top: 2px solid var(--accent); border-right: 2px solid var(--accent); }
.frame__tick--bl { bottom: -1px; left: -1px; border-bottom: 2px solid var(--accent); border-left: 2px solid var(--accent); }
.frame__tick--br { bottom: -1px; right: -1px; border-bottom: 2px solid var(--accent); border-right: 2px solid var(--accent); }

.media-zoom { display: block; width: 100%; position: relative; overflow: hidden; border-radius: var(--radius); cursor: zoom-in; }
.media-zoom img { width: 100%; transition: transform .5s cubic-bezier(.2,.7,.2,1); }
.media-zoom::after {
  content: "⤢ enlarge"; position: absolute; right: 10px; bottom: 10px; z-index: 3;
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .05em; color: var(--ink);
  background: color-mix(in srgb, var(--bg) 72%, transparent); border: 1px solid var(--line-strong);
  padding: .35em .6em; border-radius: var(--radius); opacity: 0; transition: opacity .25s; backdrop-filter: blur(4px);
}
.media-zoom:hover img { transform: scale(1.03); }
.media-zoom:hover::after { opacity: 1; }

/* wide panorama case */
.case--wide .case__desc { margin-top: .3rem; }
.case__panorama { margin-top: 1.6rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 8px; }
.case__panorama .media-zoom { border-radius: 2px; }
.case__panorama img { border-radius: 2px; }
.case__cap { margin-top: .7rem; padding: 0 4px; font-size: .78rem; color: var(--ink-mute); display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.case__cap .mono { color: var(--accent); font-size: .68rem; }

/* split case (video / plot) */
.case__split-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(1.8rem, 4vw, 3.4rem); align-items: center; }
.case--reverse .case__media-col { order: 2; }
.case__text-col .case__desc { margin-top: 0; }

/* device (video monitor) */
.device { max-width: 380px; margin-inline: auto; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface-2); padding: 10px; box-shadow: var(--shadow); }
.device__bar { display: flex; align-items: center; gap: .5rem; font-size: .64rem; letter-spacing: .14em; color: var(--ink-mute); padding: .1rem .25rem .55rem; }
.device__led { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--glow); animation: pulse 2s infinite; }
.device__screen { width: 100%; border-radius: 4px; background: #000; aspect-ratio: 484 / 668; object-fit: cover; }
.device__play {
  position: absolute; right: 20px; bottom: 20px; z-index: 5; width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center; background: color-mix(in srgb, var(--bg) 55%, transparent);
  border: 1px solid var(--line-strong); backdrop-filter: blur(6px); color: var(--accent); transition: transform .2s, background .2s, opacity .3s;
}
.device__play:hover { transform: scale(1.08); background: var(--accent); color: var(--accent-ink); }
.device__play svg { fill: currentColor; }
.device__play .ic-pause { display: none; }
.device.is-playing .device__play .ic-play { display: none; }
.device.is-playing .device__play .ic-pause { display: block; }
.device__play { opacity: 0; }
.device:hover .device__play, .device.is-paused .device__play { opacity: 1; }

/* plot frame (traffic) */
.frame--plot { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 8px; max-width: 460px; margin-inline: auto; }
.frame--plot .media-zoom { border-radius: 2px; }

/* gallery (thesis) */
.gallery { margin-top: 1.8rem; display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.gallery__item { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); grid-column: span 2; position: relative; }
.gallery__item--lg { grid-column: span 3; }
.gallery__item img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.gallery__cap {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 3; padding: 1.4rem .85rem .7rem;
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .03em; color: #fff;
  background: linear-gradient(transparent, rgba(4,12,14,.82)); pointer-events: none;
}

/* more cards */
.more__head { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; color: var(--ink); margin-top: clamp(3.5rem, 7vw, 5.5rem); margin-bottom: 1.5rem; display: flex; align-items: center; gap: .7rem; }
.more__head .mono { font-size: .7rem; color: var(--accent); letter-spacing: .16em; border: 1px solid var(--line-strong); padding: .3em .6em; border-radius: var(--radius); background: var(--accent-dim); }
.more { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }
.mcard {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 1.5rem 1.4rem;
  display: flex; flex-direction: column; gap: .5rem; transition: transform .22s, border-color .22s, background .22s;
}
.mcard:hover { transform: translateY(-4px); border-color: var(--line-strong); background: var(--surface-2); }
.mcard h4 { font-family: var(--font-display); font-weight: 700; font-size: 1.06rem; color: var(--ink); line-height: 1.2; }
.mcard__meta { font-size: .68rem; color: var(--ink-mute); letter-spacing: .05em; }
.mcard p { font-size: .9rem; line-height: 1.5; color: var(--ink-soft); }
.mcard__link { font-family: var(--font-mono); font-size: .76rem; margin-top: auto; padding-top: .4rem; display: inline-flex; align-items: center; gap: .35em; }
.mcard__link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ----------------------------------------------------- skills */
.skills { background: var(--bg-2); border-block: 1px solid var(--line); }
.skillgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.skillcard { background: var(--bg); padding: 1.7rem 1.5rem; transition: background .25s; }
.skillcard:hover { background: var(--surface); }
.skillcard__label { font-size: .7rem; letter-spacing: .18em; color: var(--accent); margin-bottom: 1.1rem; }
.skillcard__list { display: flex; flex-wrap: wrap; gap: .5rem .5rem; }
.skillcard__list li {
  font-size: .86rem; color: var(--ink-soft); padding: .4em .8em; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--surface); display: inline-flex; align-items: center; gap: .5em;
}
.lvl { font-family: var(--font-mono); font-size: .6rem; letter-spacing: .06em; text-transform: uppercase; color: var(--accent-ink); background: var(--accent); padding: .18em .45em; border-radius: 2px; }

/* ----------------------------------------------------- research / education */
.research__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.4rem, 3vw, 2.4rem); align-items: start; }

.pub { border: 1px solid var(--line-strong); border-radius: var(--radius); background: linear-gradient(180deg, var(--accent-dim), transparent 60%), var(--surface); padding: 1.8rem 1.7rem; position: relative; overflow: hidden; }
.pub::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent); }
.pub__badge { font-size: .68rem; letter-spacing: .14em; color: var(--accent); margin-bottom: 1rem; }
.pub__title { font-family: var(--font-display); font-weight: 700; font-size: 1.28rem; line-height: 1.24; color: var(--ink); letter-spacing: -.01em; }
.pub__authors { margin-top: .9rem; font-size: .92rem; color: var(--ink); font-weight: 500; }
.pub__authors::first-letter { color: var(--accent); }
.pub__venue { margin-top: .35rem; font-size: .88rem; color: var(--ink-mute); line-height: 1.45; }
.pub__doi { display: inline-flex; align-items: center; gap: .5em; margin-top: 1.2rem; font-family: var(--font-mono); font-size: .78rem; padding: .5em .85em; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--bg-2); transition: border-color .2s, background .2s; }
.pub__doi:hover { border-color: var(--accent); background: var(--accent-dim); }
.pub__doi .mono { color: var(--ink-mute); }

.edu { display: flex; flex-direction: column; gap: 1.3rem; }
.edu__item { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 1.4rem 1.5rem; }
.edu__row { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
.edu__row h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; color: var(--ink); line-height: 1.2; }
.edu__yr { font-size: .74rem; color: var(--ink-mute); white-space: nowrap; }
.edu__org { margin-top: .4rem; font-size: .9rem; color: var(--accent); font-weight: 500; }
.edu__note { margin-top: .5rem; font-size: .86rem; color: var(--ink-mute); line-height: 1.5; }

.awards { border-top: 1px solid var(--line); padding-top: 1.2rem; margin-top: .2rem; }
.awards__label { font-size: .68rem; letter-spacing: .16em; color: var(--ink-mute); margin-bottom: .8rem; }
.awards ul { display: flex; flex-direction: column; gap: .6rem; }
.awards li { font-size: .9rem; color: var(--ink-soft); display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.awards__yr { font-size: .68rem; color: var(--ink-mute); white-space: nowrap; }

/* ----------------------------------------------------- contact */
.contact { position: relative; overflow: hidden; border-top: 1px solid var(--line); background: var(--bg-2); text-align: center; }
.contact__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; opacity: .9; }
.contact__inner { position: relative; z-index: 2; max-width: 780px; }
.contact .eyebrow { justify-content: center; }
.contact__title { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.9rem, 1rem + 3.6vw, 3.3rem); line-height: 1.08; letter-spacing: -.02em; color: var(--ink); margin: 1.2rem auto 0; text-wrap: balance; }
.contact__lede { max-width: 52ch; margin: 1.3rem auto 0; font-size: 1.08rem; color: var(--ink-soft); }
.contact__actions { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; margin-top: 2.2rem; }
.contact__links { display: flex; flex-wrap: wrap; gap: 1.6rem; justify-content: center; margin-top: 2.6rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.contact__links li { display: flex; align-items: center; gap: .5rem; font-size: .9rem; }
.contact__links .mono { font-size: .64rem; letter-spacing: .1em; color: var(--accent-ink); background: var(--accent); padding: .3em .5em; border-radius: 2px; }
.contact__links a { color: var(--ink-soft); }
.contact__links a:hover { color: var(--accent); }

/* ----------------------------------------------------- footer */
.footer { border-top: 1px solid var(--line); padding-block: 2rem; background: var(--bg); }
.footer__inner { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; font-size: .78rem; color: var(--ink-mute); }
.footer__brand { color: var(--ink-soft); letter-spacing: .12em; }
.footer__mid { color: var(--ink-mute); }

/* ----------------------------------------------------- lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 300; display: grid; place-items: center; padding: 4vw;
  background: color-mix(in srgb, #04090b 88%, transparent); backdrop-filter: blur(8px);
  cursor: zoom-out; opacity: 0; animation: fadein .25s forwards;
}
.lightbox[hidden] { display: none; }
@keyframes fadein { to { opacity: 1; } }
.lightbox__img { max-width: 96vw; max-height: 88vh; border-radius: var(--radius); border: 1px solid var(--line-strong); box-shadow: 0 30px 80px -20px rgba(0,0,0,.8); }
.lightbox__close { position: fixed; top: 18px; right: 24px; font-size: 2.4rem; line-height: 1; color: #fff; width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.2); }
.lightbox__close:hover { background: rgba(255,255,255,.12); }
.lightbox__hint { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); font-size: .7rem; letter-spacing: .1em; color: rgba(255,255,255,.6); }

/* ----------------------------------------------------- reveal animation */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in-view { opacity: 1; transform: none; }
.tl.reveal:nth-child(n) { transition-delay: .04s; }
.more .mcard:nth-child(2) { transition-delay: .07s; }
.more .mcard:nth-child(3) { transition-delay: .14s; }
.more .mcard:nth-child(4) { transition-delay: .21s; }
.skillgrid .skillcard:nth-child(2) { transition-delay: .05s; }
.skillgrid .skillcard:nth-child(3) { transition-delay: .1s; }
.skillgrid .skillcard:nth-child(4) { transition-delay: .15s; }
.skillgrid .skillcard:nth-child(5) { transition-delay: .2s; }
.skillgrid .skillcard:nth-child(6) { transition-delay: .25s; }

/* ============================================================ responsive */
@media (max-width: 940px) {
  :root { --nav-h: 62px; }
  .nav__links {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; gap: 0; margin: 0;
    background: color-mix(in srgb, var(--bg) 96%, transparent); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line); padding: .5rem var(--pad) 1.2rem;
    transform: translateY(-120%); transition: transform .35s cubic-bezier(.2,.7,.2,1); pointer-events: none;
  }
  .nav__links.is-open { transform: translateY(0); pointer-events: auto; }
  .nav__links a { padding: .85rem 0; border-bottom: 1px solid var(--line); font-size: 1rem; }
  .nav__links a::after { display: none; }
  .nav__burger { display: flex; }
  .nav__name { display: none; }
  .about__grid { grid-template-columns: 1fr; gap: 2.4rem; }
  .research__grid { grid-template-columns: 1fr; }
  .case__split-grid { grid-template-columns: 1fr; gap: 2rem; }
  .case--reverse .case__media-col { order: 0; }
  .device, .frame--plot { max-width: 340px; }
}

@media (max-width: 620px) {
  .tl { grid-template-columns: 1fr; gap: .5rem; padding-left: 2rem; }
  .tl__time { padding-top: 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .gallery__item, .gallery__item--lg { grid-column: span 1; }
  .gallery__item--lg { grid-column: span 2; }
  .hero__meta { gap: 1rem 1.4rem; }
  .footer__inner { justify-content: center; text-align: center; }
  .nav__resume span { display: none; }
  .nav__resume { padding: .6em .7em; }
}

@media (max-width: 400px) {
  .stats { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .gallery__item--lg { grid-column: span 1; }
}

/* ============================================================ reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .ticker__track { animation: none; }
  .hero__scroll-dot { animation: none; }
}