/* ==========================================================================
   Neural Atelier — design system
   Dark, generative-AI studio aesthetic: deep graphite/violet, glass panels,
   a living node-graph as the signature motif, restrained glow.
   ========================================================================== */

:root{
  --bg:#0A0A16;
  --bg-1:#0D0D1F;
  --bg-2:#12122A;
  --bg-3:#1B1440;
  --ink:#F4F2FF;
  --ink-dim:#C6C2E6;
  --muted:#847FB0;
  --muted-dim:#5B5686;
  --line:rgba(244,242,255,0.09);
  --line-strong:rgba(244,242,255,0.18);
  --glass:rgba(139,124,255,0.055);
  --glass-strong:rgba(139,124,255,0.09);
  --accent:#8B7CFF;
  --accent-ink:#0A0A16;
  --accent-soft:rgba(139,124,255,0.16);
  --accent-shadow:rgba(139,124,255,.65);
  --cyan:#5FD4E0;
  --cyan-soft:rgba(95,212,224,0.16);
  --blob-2:rgba(95,212,224,.18);
  --success:#6EE7B7;
  --radius-sm:6px;
  --radius:16px;
  --radius-lg:26px;
  --font-head:'Space Grotesk',ui-sans-serif,system-ui,sans-serif;
  --font-body:'Inter',ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Monaco,monospace;
  --ease:cubic-bezier(.16,.8,.24,1);
  --ease-soft:cubic-bezier(.22,.9,.32,1);
  --dur-fast:200ms;
  --dur:560ms;
  --container:1240px;
}

/* Light mode — same system, daylight palette */
body.theme-light{
  --bg:#F5F3FC;
  --bg-1:#FFFFFF;
  --bg-2:#ECE8FA;
  --bg-3:#DCD4F7;
  --ink:#171331;
  --ink-dim:#443E68;
  --muted:#726C99;
  --muted-dim:#A29CC4;
  --line:rgba(23,19,49,0.10);
  --line-strong:rgba(23,19,49,0.20);
  --glass:rgba(255,255,255,0.55);
  --glass-strong:rgba(255,255,255,0.78);
  --accent:#6C4CF0;
  --accent-ink:#FFFFFF;
  --accent-soft:rgba(108,76,240,0.14);
  --accent-shadow:rgba(108,76,240,.32);
  --cyan:#0A8A9E;
  --cyan-soft:rgba(10,138,158,0.14);
  --blob-2:rgba(10,138,158,.14);
  --success:#0E8F63;
}
body{transition:background var(--dur) var(--ease-soft), color var(--dur) var(--ease-soft)}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@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;scroll-behavior:auto !important}
}
html,body{margin:0;padding:0;min-height:100%}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:600;margin:0;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}

::selection{background:var(--accent-soft);color:var(--ink)}

/* Skip link */
.skip-link{
  position:fixed;top:-60px;left:16px;z-index:1000;
  background:var(--accent);color:var(--accent-ink);
  padding:10px 16px;border-radius:var(--radius-sm);font-weight:600;
  text-decoration:none;transition:top var(--dur-fast) var(--ease);
}
.skip-link:focus{top:16px}

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

/* ==========================================================================
   Backdrop — ambient drifting gradient field
   ========================================================================== */
.field-backdrop{
  position:fixed;inset:0;z-index:-3;pointer-events:none;overflow:hidden;
  background:var(--bg);
}
.field-backdrop::before,.field-backdrop::after{
  content:'';position:absolute;border-radius:50%;filter:blur(90px);
  opacity:.35;will-change:transform;
}
.field-backdrop::before{
  width:640px;height:640px;top:-220px;left:-160px;
  background:radial-gradient(circle at 30% 30%, var(--bg-3), transparent 70%);
  animation:driftA 34s ease-in-out infinite alternate;
}
.field-backdrop::after{
  width:560px;height:560px;bottom:-200px;right:-140px;
  background:radial-gradient(circle at 60% 60%, var(--blob-2), transparent 70%);
  animation:driftB 40s ease-in-out infinite alternate;
}
@keyframes driftA{from{transform:translate(0,0) scale(1)}to{transform:translate(60px,40px) scale(1.08)}}
@keyframes driftB{from{transform:translate(0,0) scale(1)}to{transform:translate(-50px,-30px) scale(1.05)}}
.field-vignette{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:radial-gradient(120% 70% at 50% 0%, transparent 0%, var(--bg) 88%);
}
@media (prefers-reduced-motion:reduce){
  .field-backdrop::before,.field-backdrop::after{animation:none}
}

/* Cursor glow (desktop, fine pointer only) */
.cursor-glow{
  position:fixed;top:0;left:0;width:340px;height:340px;
  pointer-events:none;z-index:1;transform:translate(-999px,-999px);
  background:radial-gradient(circle, var(--accent-soft) 0%, transparent 68%);
  opacity:0;transition:opacity 400ms var(--ease);border-radius:50%;
}
.cursor-glow.is-active{opacity:1}
@media (hover:none), (pointer:coarse){ .cursor-glow{display:none} }

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal{
  opacity:0;transform:translateY(26px);filter:blur(6px);
  transition:opacity var(--dur) var(--ease-soft), transform var(--dur) var(--ease-soft), filter var(--dur) var(--ease-soft);
  transition-delay:var(--d,0ms);
}
.reveal.is-visible{opacity:1;transform:translateY(0);filter:blur(0)}

/* ==========================================================================
   Layout helpers
   ========================================================================== */
.wrap{max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:130px 0 40px;position:relative}
.section-head{display:flex;align-items:baseline;gap:16px;margin-bottom:52px;flex-wrap:wrap}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);white-space:nowrap;display:inline-flex;align-items:center;gap:8px;
}
.eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.section-title{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.02em}
.section-rule{
  flex:1;height:1px;min-width:40px;
  background:linear-gradient(90deg, var(--line-strong), transparent);
  position:relative;overflow:hidden;
}
.section-rule::after{
  content:'';position:absolute;top:0;left:-30%;width:30%;height:100%;
  background:linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity:0;
}
.section-head.is-visible .section-rule::after{opacity:.9;animation:pulseTravel 1.8s var(--ease) 220ms both}
@keyframes pulseTravel{from{left:-30%}to{left:110%}}

/* Glass panel primitive */
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  position:relative;
}

/* Spotlight hover — mouse-tracked glow on cards */
.spotlight{position:relative;overflow:hidden}
.spotlight::before{
  content:'';position:absolute;inset:0;pointer-events:none;opacity:0;
  background:radial-gradient(320px circle at var(--mx,50%) var(--my,50%), var(--accent-soft), transparent 70%);
  transition:opacity 320ms var(--ease);
}
.spotlight:hover::before,.spotlight:focus-within::before{opacity:1}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:999px;
  font-weight:600;font-size:14px;text-decoration:none;cursor:pointer;
  border:1px solid transparent;transition:transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  font-family:var(--font-body);position:relative;
}
.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 14px 34px -14px var(--accent-shadow)}
.btn-primary:hover{box-shadow:0 18px 42px -12px var(--accent-shadow)}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-ghost{background:var(--glass);color:var(--ink-dim);border-color:var(--line)}
.btn-ghost:hover{color:var(--ink);border-color:var(--line-strong)}
.btn-sm{padding:10px 16px;font-size:13px}
.magnetic{will-change:transform}

/* ==========================================================================
   Nav
   ========================================================================== */
.nav{
  position:sticky;top:0;z-index:200;
  border-bottom:1px solid var(--line);
  background:color-mix(in srgb, var(--bg) 74%, transparent);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.nav-inner{
  max-width:var(--container);margin:0 auto;padding:16px 32px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-mark{width:30px;height:30px;flex:none}
.brand-text{font-family:var(--font-mono);font-size:13px;letter-spacing:.03em;line-height:1.25}
.brand-text strong{display:block;font-weight:600;color:var(--ink);font-size:14px;font-family:var(--font-head)}
.brand-text span{color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.03em;
  color:var(--muted);text-decoration:none;padding:9px 14px;border-radius:999px;
  transition:color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a.is-active{color:var(--accent);background:var(--glass-strong)}
.nav-actions{display:flex;align-items:center;gap:8px}
.icon-btn{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:999px;
  color:var(--ink);cursor:pointer;transition:border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.icon-btn:hover{border-color:var(--accent);color:var(--accent)}
.icon-btn svg{width:17px;height:17px}
.nav-toggle{display:none}
.nav-toggle svg{width:18px;height:18px}

@media (max-width:900px){
  .nav-links{
    position:fixed;inset:64px 16px auto 16px;
    background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
    flex-direction:column;align-items:stretch;padding:10px;gap:2px;
    box-shadow:0 24px 60px -20px rgba(0,0,0,.6);
    opacity:0;transform:translateY(-8px);pointer-events:none;
    transition:opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  }
  .nav-links.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
  .nav-links a{padding:12px 14px;border-radius:var(--radius-sm)}
  .nav-toggle{display:flex}
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{padding:40px 0 20px;position:relative}
.hero-canvas-wrap{
  position:absolute;inset:-40px 0 auto 0;height:min(720px,100%);z-index:0;
  pointer-events:none;overflow:hidden;border-radius:var(--radius-lg);
  mask-image:radial-gradient(80% 80% at 50% 30%, black 55%, transparent 100%);
}
#neural-canvas{width:100%;height:100%;display:block}
.hero-frame{position:relative;z-index:1;padding:clamp(22px,4vw,44px) 0 0}
.hero-meta{
  display:flex;justify-content:space-between;align-items:flex-start;gap:16px;
  font-family:var(--font-mono);font-size:11.5px;color:var(--muted);letter-spacing:.05em;
  margin-bottom:34px;flex-wrap:wrap;
}
.hero-meta .tag-line{display:flex;gap:22px;flex-wrap:wrap}
.hero-meta strong{color:var(--ink-dim);font-weight:500}
.hero-eyebrow{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);display:inline-flex;align-items:center;gap:8px;margin-bottom:22px;
}
.hero-eyebrow::before{
  content:'';width:8px;height:8px;background:var(--accent);border-radius:50%;display:inline-block;
  box-shadow:0 0 0 4px var(--accent-soft);animation:blink 2.4s ease-in-out infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}
.hero-title{
  font-size:clamp(32px,5.8vw,64px);line-height:1.06;letter-spacing:-.03em;
  max-width:18ch;
}
.hero-title .kw{display:inline-block;overflow:hidden;vertical-align:top}
.hero-title .kw span{display:inline-block;transform:translateY(110%);transition:transform 760ms var(--ease-soft)}
.hero-title.is-ready .kw span{transform:translateY(0)}
.hero-title .kw.accent-word span{color:var(--accent)}
.hero-sub{
  color:var(--ink-dim);font-size:clamp(15px,1.8vw,17.5px);line-height:1.7;
  max-width:640px;margin-top:20px;
}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}

.hero-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:28px;margin-top:40px;align-items:stretch}
.spec-panel{padding:22px;display:flex;flex-direction:column;gap:14px}
.spec-panel-head{
  display:flex;justify-content:space-between;align-items:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);
  border-bottom:1px dashed var(--line);padding-bottom:10px;
}
.spec-row{display:flex;justify-content:space-between;gap:12px;font-size:14px}
.spec-row dt{color:var(--muted);font-family:var(--font-mono);font-size:12px}
.spec-row dd{margin:0;color:var(--ink);font-weight:500;text-align:right}
.spec-langs{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}
.chip{
  font-family:var(--font-mono);font-size:11px;padding:4px 10px;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--ink-dim);white-space:nowrap;background:var(--glass);
}

.stat-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat-cell{background:var(--bg-1);padding:18px 18px;text-align:left;position:relative}
.stat-live{
  position:absolute;top:12px;right:14px;font-family:var(--font-mono);font-size:9px;letter-spacing:.08em;
  color:var(--success);display:flex;align-items:center;gap:4px;
}
.stat-live::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--success);animation:blink 1.8s ease-in-out infinite}
.stat-num{font-family:var(--font-head);font-size:clamp(26px,3vw,36px);font-weight:700;color:var(--ink);letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat-num .unit{color:var(--accent);font-size:.6em;margin-left:2px}
.stat-label{font-family:var(--font-mono);font-size:11px;color:var(--muted);letter-spacing:.03em;margin-top:6px}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
}

/* ==========================================================================
   About
   ========================================================================== */
.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:start}
.about-text{font-size:17px;line-height:1.9;color:var(--ink-dim)}
.about-text strong{color:var(--ink);font-weight:600}
.id-card{padding:26px;position:relative}
.id-card-corner{position:absolute;top:16px;right:16px;width:52px;height:52px;opacity:.5}
.id-card-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line);font-size:13.5px}
.id-card-row:last-child{border-bottom:none}
.id-card-row dt{font-family:var(--font-mono);color:var(--muted);font-size:11.5px;text-transform:uppercase;letter-spacing:.04em}
.id-card-row dd{margin:0;color:var(--ink);font-weight:500;text-align:right}
.status-dot{display:inline-flex;align-items:center;gap:6px;color:var(--success)}
.status-dot::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 3px color-mix(in srgb, var(--success) 25%, transparent);animation:blink 2.2s ease-in-out infinite}
.focus-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

@media (max-width:900px){.about-grid{grid-template-columns:1fr}}

/* ==========================================================================
   Skills — constellation grid
   ========================================================================== */
.skills-constellation{position:relative}
.skills-lines{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.5;pointer-events:none}
.skills-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:repeat(6,1fr);gap:20px;
}
.skill-panel{
  grid-column:span 3;padding:26px;
  transition:border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.skill-panel:hover{border-color:var(--line-strong);transform:translateY(-4px)}
.skill-panel.span-2{grid-column:span 2}
.skill-panel.is-full{grid-column:span 6}
.skill-panel-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px}
.skill-index{font-family:var(--font-mono);font-size:11px;color:var(--muted)}
.skill-panel h3{font-size:18px}
.skill-desc{color:var(--muted);font-size:14px;line-height:1.65;margin-bottom:16px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  font-family:var(--font-mono);font-size:12px;padding:6px 12px;border-radius:999px;
  border:1px solid var(--line);color:var(--ink-dim);background:var(--bg-1);
  transition:border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.tag:hover{border-color:var(--accent);color:var(--accent)}
@media (max-width:1000px){
  .skill-panel,.skill-panel.span-2{grid-column:span 6}
}

/* ==========================================================================
   Timeline — signal path
   ========================================================================== */
.timeline{position:relative}
.timeline-track{
  position:absolute;left:8px;top:6px;bottom:6px;width:3px;border-radius:999px;
  background:var(--line-strong);
}
.timeline-track-fill{
  position:absolute;left:0;top:0;width:100%;height:0;border-radius:999px;
  background:linear-gradient(180deg, var(--accent), var(--cyan));
  box-shadow:0 0 14px 1px var(--accent-soft);
}
.timeline-item{position:relative;padding:0 0 44px 46px}
.timeline-item:last-child{padding-bottom:4px}
.timeline-dot{
  position:absolute;left:0;top:2px;width:19px;height:19px;border-radius:50%;
  background:var(--bg-1);border:3px solid var(--line-strong);
  transition:border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.timeline-dot::after{
  content:'';position:absolute;inset:-3px;border-radius:50%;
  border:1.5px solid var(--accent);opacity:0;transform:scale(.7);
}
.timeline-item.is-visible .timeline-dot{border-color:var(--accent);background:var(--accent);box-shadow:0 0 0 6px var(--accent-soft)}
.timeline-item.is-visible .timeline-dot::after{animation:dotPulse 2.6s var(--ease-soft) 300ms infinite}
@keyframes dotPulse{
  0%{opacity:.7;transform:scale(.7)}
  70%{opacity:0;transform:scale(1.7)}
  100%{opacity:0;transform:scale(1.7)}
}
@media (prefers-reduced-motion:reduce){
  .timeline-item.is-visible .timeline-dot::after{animation:none}
}
.timeline-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.timeline-kind{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  padding:3px 10px;border-radius:999px;border:1px solid var(--line-strong);color:var(--muted);
}
.timeline-kind.kind-work{color:var(--cyan);border-color:color-mix(in srgb, var(--cyan) 45%, transparent)}
.timeline-kind.kind-edu{color:var(--accent);border-color:color-mix(in srgb, var(--accent) 45%, transparent)}
.timeline-date{font-family:var(--font-mono);font-size:12px;color:var(--muted)}
.timeline-item h3{font-size:19px;margin-bottom:2px}
.timeline-org{color:var(--ink-dim);font-size:14px;margin-bottom:12px}
.timeline-desc{color:var(--muted);font-size:15px;line-height:1.75;max-width:700px}
.timeline-achievements{margin-top:14px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px 20px;max-width:760px}
.timeline-achievements li{
  font-size:13.5px;color:var(--ink-dim);padding-left:16px;position:relative;line-height:1.55;
}
.timeline-achievements li::before{content:'';position:absolute;left:0;top:8px;width:6px;height:1px;background:var(--accent)}

/* ==========================================================================
   Projects
   ========================================================================== */
.project-filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px}
.filter-pill{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;
  padding:9px 16px;border-radius:999px;border:1px solid var(--line);
  background:var(--glass);color:var(--muted);cursor:pointer;
  transition:border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.filter-pill:hover{color:var(--ink)}
.filter-pill.is-active{color:var(--accent-ink);background:var(--accent);border-color:var(--accent)}

.projects-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.project-card{
  grid-column:span 1;padding:26px;position:relative;
  transition:border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), opacity 320ms var(--ease), max-height 420ms var(--ease);
}
.project-card:hover{border-color:var(--line-strong);transform:translateY(-4px)}
.project-card.is-flagship{grid-column:span 2}
.project-card.is-hidden{
  display:none;
}
.project-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:14px}
.project-head .icon-btn{width:46px;height:46px;flex:none}
.project-head .icon-btn svg{width:25px;height:25px}
.project-index{font-family:var(--font-mono);font-size:11px;color:var(--muted)}
.project-card h3{font-size:22px;margin-bottom:6px}
.project-tagline{font-family:var(--font-mono);font-size:12px;color:var(--accent);letter-spacing:.02em}
.project-desc{color:var(--ink-dim);font-size:15px;line-height:1.7;margin:14px 0}
.project-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:14px;margin:18px 0;padding:16px 0;border-top:1px dashed var(--line);border-bottom:1px dashed var(--line)}
.project-stats div strong{display:block;font-family:var(--font-head);font-size:18px;color:var(--ink)}
.project-stats div span{font-family:var(--font-mono);font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.03em}
.project-detail{
  max-height:0;overflow:hidden;transition:max-height 480ms var(--ease);
}
.project-detail-inner{padding-top:6px}
.project-detail ul{margin:6px 0 0;display:grid;gap:8px}
.project-detail li{font-size:13.5px;color:var(--muted);padding-left:16px;position:relative;line-height:1.6}
.project-detail li::before{content:'';position:absolute;left:0;top:8px;width:6px;height:1px;background:var(--cyan)}
.project-actions{display:flex;justify-content:space-between;align-items:center;margin-top:18px;gap:10px;flex-wrap:wrap}
.project-toggle{
  background:none;border:none;color:var(--ink-dim);font-family:var(--font-mono);font-size:12.5px;
  cursor:pointer;display:flex;align-items:center;gap:6px;padding:8px 0;
}
.project-toggle svg{width:12px;height:12px;transition:transform var(--dur-fast) var(--ease)}
.project-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.project-toggle:hover{color:var(--accent)}
.project-links{display:flex;gap:10px}

.lab-list{margin-top:26px;border-top:1px solid var(--line);padding-top:22px}
.lab-list-head{font-family:var(--font-mono);font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px}
.lab-item{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:14px 4px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink);
  transition:padding-left var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.lab-item:last-child{border-bottom:none}
.lab-item:hover{padding-left:8px;color:var(--accent)}
.lab-item-name{font-weight:600;font-size:15px}
.lab-item-desc{color:var(--muted);font-size:13.5px;margin-top:2px;font-weight:400}
.lab-item-arrow{font-family:var(--font-mono);font-size:14px;color:var(--muted);flex:none}

@media (max-width:900px){
  .projects-grid{grid-template-columns:1fr}
  .project-card.is-flagship{grid-column:span 1}
}

/* ==========================================================================
   Practice / sandbox
   ========================================================================== */
.practice-card{padding:28px}
.practice-task{margin:0 0 18px;font-size:16px;color:var(--ink-dim);font-weight:400}
.practice-task code{font-family:var(--font-mono);color:var(--accent);background:var(--bg-1);padding:2px 6px;border-radius:4px}
.practice-controls{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.practice-controls label{font-family:var(--font-mono);font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
#lang-select{
  padding:10px 14px;border-radius:var(--radius-sm);border:1px solid var(--line-strong);
  background:var(--bg-1);color:var(--ink);font-family:var(--font-mono);font-size:13px;font-weight:500;
  cursor:pointer;max-width:200px;
}
.practice-body{display:flex;gap:18px;align-items:flex-start}
#code-input{
  flex:1;min-height:150px;padding:16px;border-radius:var(--radius-sm);
  border:1px solid var(--line-strong);background:var(--bg-1);color:var(--ink);
  font-family:var(--font-mono);font-size:13.5px;line-height:1.6;resize:vertical;
}
#code-input:focus{border-color:var(--accent)}
.practice-actions{width:220px;display:flex;flex-direction:column;gap:12px}
.result{
  min-height:70px;padding:12px;border-radius:var(--radius-sm);border:1px solid var(--line);
  background:var(--bg-1);color:var(--muted);display:flex;align-items:center;justify-content:center;
  text-align:center;font-size:13px;font-family:var(--font-mono);
}
.result.success{border-color:color-mix(in srgb, var(--success) 45%, transparent);color:var(--success)}
.result.error{border-color:color-mix(in srgb, var(--accent) 45%, transparent);color:var(--accent)}
.practice-note{margin-top:16px;color:var(--muted);font-size:12.5px;font-family:var(--font-mono)}
@media (max-width:800px){
  .practice-body{flex-direction:column}
  .practice-actions{width:100%}
}

/* ==========================================================================
   Footer / contact
   ========================================================================== */
.footer{border-top:1px solid var(--line);margin-top:60px;padding:64px 0 32px;position:relative;overflow:hidden}
.footer-accent{position:absolute;top:0;left:50%;transform:translateX(-50%);width:min(900px,90vw);height:220px;pointer-events:none;opacity:.5}
.footer-panel{
  padding:clamp(24px,4vw,44px);
  display:grid;grid-template-columns:1.3fr 1fr;gap:36px;position:relative;
}
.footer-title{font-size:clamp(24px,3vw,32px);letter-spacing:-.02em;margin-bottom:14px}
.footer-lead{color:var(--ink-dim);font-size:15.5px;line-height:1.7;max-width:440px}
.footer-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.footer-meta{display:flex;flex-direction:column;gap:12px;justify-content:center}
.footer-meta-row{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:10px;font-size:13.5px}
.footer-meta-row dt{font-family:var(--font-mono);color:var(--muted);font-size:11.5px;text-transform:uppercase}
.footer-meta-row dd{margin:0;color:var(--ink);font-weight:500;text-align:right}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  margin-top:28px;padding-top:20px;font-family:var(--font-mono);font-size:11.5px;color:var(--muted);
}
@media (max-width:800px){
  .footer-panel{grid-template-columns:1fr}
}

/* ==========================================================================
   Responsive base
   ========================================================================== */
@media (max-width:900px){
  .section{padding:96px 0 20px}
  .wrap{padding:0 20px}
}
@media (max-width:600px){
  body{font-size:15px}
  .section{padding:76px 0 12px}
  .hero{padding:32px 0 24px}
  .hero-meta{gap:10px}
  .hero-actions .btn{flex:1;justify-content:center}
  .stat-strip{grid-template-columns:1fr}
  .project-stats{grid-template-columns:repeat(2,1fr)}
  .id-card-row,.footer-meta-row,.spec-row{flex-wrap:wrap}
  .timeline-achievements{grid-template-columns:1fr}
  .timeline-item{padding-left:38px}
  .project-filters{gap:6px}
  .filter-pill{padding:8px 13px;font-size:11.5px}
}
@media (max-width:400px){
  .hero-eyebrow{font-size:11px}
  .hero-meta{font-size:10.5px}
  .stat-cell{padding:14px}
}

.modal{display:none}