/* ---------- Design tokens (twilight by default) ---------- */
:root {
  --bg: #0b0c1a;
  --bg-elev: #14152a;
  --bg-sunken: #070812;
  --text: #ece9f7;
  --text-muted: #a9a4c4;
  --text-faint: #6f6a8c;
  --line: #262742;
  --accent: #c9a2ff;
  --accent-ink: #1a0f33;
  --accent-soft: #2a1f4d;
  --glow: #f5a3b8;
  --warn: #f6c177;
  --warn-soft: #2b2014;
  --shadow: 0 1px 2px rgba(0,0,0,.5), 0 16px 40px -16px rgba(60, 30, 120, .55);
  --radius: 14px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --twilight: linear-gradient(180deg, #0b0c1a 0%, #1d1a3f 30%, #4a2c6b 58%, #8a4a72 78%, #c97b6e 92%, #0b0c1a 100%);
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #f7f4fb;
  --bg-elev: #ffffff;
  --bg-sunken: #ece7f5;
  --text: #1a1630;
  --text-muted: #5d5878;
  --text-faint: #8d889f;
  --line: #ddd7ea;
  --accent: #6b3fb5;
  --accent-ink: #ffffff;
  --accent-soft: #e7dcfa;
  --glow: #c2537a;
  --warn: #a35a0f;
  --warn-soft: #fdf1e2;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 8px 24px -12px rgba(60,30,120,.2);
  color-scheme: light;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(120, 70, 190, .18), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(200, 100, 130, .12), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
code, pre { font-family: var(--mono); font-size: .875em; }
.wrap { width: min(1100px, 100% - 2.5rem); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

section { padding-block: clamp(3rem, 7vw, 5.5rem); }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .75rem 2rem; margin-bottom: 1.75rem; }
.section-head h2 { margin: 0; font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -.02em; background: linear-gradient(90deg, var(--text), color-mix(in srgb, var(--accent) 70%, var(--text))); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-head p { margin: 0; color: var(--text-muted); max-width: 52ch; }
.eyebrow { font-family: var(--mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin: 0 0 .5rem; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}
.nav-links a { text-shadow: 0 1px 8px rgba(0,0,0,.4); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; height: 60px; }
.brand { font-weight: 600; letter-spacing: -.01em; color: var(--text); display: flex; align-items: center; gap: .6rem; }
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.nav-links { display: flex; gap: 1.25rem; align-items: center; margin: 0; padding: 0; list-style: none; }
.nav-links a { color: var(--text-muted); font-size: .925rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.theme-btn {
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--text);
  border-radius: 999px; width: 36px; height: 36px; cursor: pointer; display: grid; place-items: center;
}
.theme-btn:hover { border-color: var(--text-faint); }
.theme-btn svg { width: 16px; height: 16px; }
.kaggle-badge svg { width: 12px; height: 12px; }
@media (max-width: 640px) { .nav-links li:not(:last-child) { display: none; } }

/* ---------- Hero (full-height twilight masthead) ---------- */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  padding-block: 7rem 4rem; overflow: hidden; isolation: isolate;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -2;
  background: url("../assets/img/bg-masthead.jpg") center 35% / cover no-repeat;
  filter: grayscale(1) contrast(1.05) brightness(.9);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(180deg, rgba(11,12,26,.6) 0%, rgba(11,12,26,.25) 40%, rgba(11,12,26,.55) 78%, var(--bg) 100%),
    linear-gradient(180deg, rgba(20,16,60,.9) 0%, rgba(74,44,107,.6) 40%, rgba(150,78,120,.55) 62%, rgba(226,140,110,.5) 80%, rgba(246,190,130,.35) 90%, rgba(11,12,26,.7) 100%);
  mix-blend-mode: normal;
}
.stars {
  position: absolute; inset: 0 0 40% 0; z-index: -1; pointer-events: none; opacity: .9;
  background-image:
    radial-gradient(1px 1px at 12% 18%, #fff 60%, transparent), radial-gradient(1.5px 1.5px at 28% 8%, #fff 60%, transparent),
    radial-gradient(1px 1px at 41% 26%, #fff 60%, transparent), radial-gradient(1px 1px at 57% 12%, #fff 60%, transparent),
    radial-gradient(1.5px 1.5px at 66% 30%, #fff 60%, transparent), radial-gradient(1px 1px at 78% 9%, #fff 60%, transparent),
    radial-gradient(1px 1px at 88% 22%, #fff 60%, transparent), radial-gradient(1px 1px at 5% 38%, #fff 60%, transparent),
    radial-gradient(1.5px 1.5px at 93% 40%, #fff 60%, transparent), radial-gradient(1px 1px at 35% 44%, #fff 60%, transparent),
    radial-gradient(1px 1px at 72% 48%, #fff 60%, transparent), radial-gradient(1px 1px at 50% 36%, #fff 60%, transparent);
  animation: twinkle 6s ease-in-out infinite alternate;
  mask-image: linear-gradient(180deg, #000 20%, transparent 100%);
}
@keyframes twinkle { from { opacity: .55; } to { opacity: 1; } }
:root[data-theme="light"] .hero::after { background: linear-gradient(180deg, rgba(247,244,251,.35), rgba(247,244,251,.6) 60%, var(--bg) 100%), linear-gradient(180deg, rgba(120,90,200,.35), rgba(220,140,160,.35)); }
:root[data-theme="light"] .hero .tagline, :root[data-theme="light"] .hero .intro { color: var(--text); }
:root[data-theme="light"] .stars { display: none; }

.hero-grid { display: grid; grid-template-columns: auto 1fr; gap: 2.5rem; align-items: center; }
@media (max-width: 720px) { .hero-grid { grid-template-columns: 1fr; gap: 1.5rem; } }
.avatar {
  width: 156px; height: 156px; border-radius: 50%; object-fit: cover;
  border: 3px solid rgba(255,255,255,.7); box-shadow: 0 0 0 10px rgba(201,162,255,.15), 0 20px 50px -20px rgba(0,0,0,.8);
  background: var(--bg-sunken);
}
.hero .eyebrow { color: var(--glow); }
.hero h1 {
  margin: 0 0 .6rem; font-size: clamp(2.4rem, 6vw, 4rem); letter-spacing: .04em; line-height: 1.05;
  text-transform: uppercase; font-weight: 700; color: #fff; text-shadow: 0 2px 30px rgba(0,0,0,.5);
}
.hero .tagline { margin: 0 0 1rem; font-size: clamp(1.05rem, 2vw, 1.3rem); color: #e6def7; text-shadow: 0 1px 12px rgba(0,0,0,.5); }
.hero .intro { margin: 0; max-width: 62ch; color: #cfc6e6; text-shadow: 0 1px 12px rgba(0,0,0,.5); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.5rem; }
.hero .btn { background: rgba(20,21,42,.55); border-color: rgba(255,255,255,.18); color: #fff; backdrop-filter: blur(6px); }
.hero .btn-primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.hero .stat { background: rgba(20,21,42,.55); border-color: rgba(255,255,255,.12); backdrop-filter: blur(10px); }
.hero .stat .label { color: #cfc6e6; } .hero .stat .value { color: #fff; } .hero .stat .sub { color: #a9a4c4; }
.hero .live { background: var(--glow); box-shadow: 0 0 10px var(--glow); }

.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .55rem 1rem; border-radius: 999px; font-size: .9rem; font-weight: 500;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--text);
  cursor: pointer; transition: transform .12s ease, border-color .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); border-color: var(--text-faint); }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-primary:hover { border-color: var(--accent); }
.btn-sm { padding: .4rem .8rem; font-size: .82rem; }
.btn svg { width: 16px; height: 16px; }

/* ---------- Live stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .75rem; margin-top: 2.5rem; }
.stat {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.1rem; position: relative; overflow: hidden;
}
.stat .label { font-size: .78rem; color: var(--text-muted); display: flex; align-items: center; gap: .4rem; }
.stat .value { font-size: 1.75rem; font-weight: 600; letter-spacing: -.02em; margin-top: .15rem; font-variant-numeric: tabular-nums; }
.stat .sub { font-size: .75rem; color: var(--text-faint); margin-top: .1rem; }
.live {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1);} 50% { opacity: .4; transform: scale(.75);} }

/* skeleton loading */
.skel { color: transparent !important; background: linear-gradient(90deg, var(--bg-sunken) 25%, var(--line) 50%, var(--bg-sunken) 75%); background-size: 200% 100%; animation: shimmer 1.3s infinite; border-radius: 6px; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ---------- Notice ---------- */
.notice {
  display: none; align-items: center; gap: .6rem; margin-top: 1.25rem;
  background: var(--warn-soft); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
  border-radius: 10px; padding: .6rem .9rem; font-size: .85rem;
}
.notice.show { display: flex; }

/* ---------- Filters ---------- */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.5rem; }
.chip {
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--text-muted);
  border-radius: 999px; padding: .35rem .8rem; font-size: .82rem; cursor: pointer; font-family: inherit;
}
.chip:hover { color: var(--text); border-color: var(--text-faint); }
.chip[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); border-color: transparent; font-weight: 500; }

/* ---------- Project cards ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 1.25rem; }
.card {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.35rem; display: flex; flex-direction: column; gap: .9rem;
  box-shadow: var(--shadow); transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 20%, transparent), 0 24px 50px -20px rgba(120,70,190,.45); }
.card.featured { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .card.featured { display: grid; grid-template-columns: 1.3fr 1fr; grid-template-areas: "head meta" "body meta" "foot meta"; column-gap: 2.5rem; }
  .card.featured .card-head { grid-area: head; }
  .card.featured .card-body { grid-area: body; }
  .card.featured .card-foot { grid-area: foot; }
  .card.featured .card-meta { grid-area: meta; border-left: 1px solid var(--line); padding-left: 2rem; border-top: 0; padding-top: 0; }
}
.card.hidden { display: none; }
.card-head { display: flex; flex-direction: column; gap: .35rem; }
.card-kicker { display: flex; align-items: center; justify-content: space-between; gap: .5rem; flex-wrap: wrap; }
.kaggle-badge {
  display: inline-flex; align-items: center; gap: .35rem; font-size: .72rem; font-weight: 600;
  color: #20beff; background: color-mix(in srgb, #20beff 12%, transparent); padding: .2rem .55rem; border-radius: 6px;
}
.card h3 { margin: 0; font-size: 1.2rem; letter-spacing: -.015em; }
.card h3 a { color: var(--text); }
.card .summary { margin: 0; color: var(--text-muted); font-size: .95rem; }
.card-body ul { margin: 0; padding-left: 1.1rem; color: var(--text-muted); font-size: .9rem; }
.card-body li { margin: .2rem 0; }
.card-body li::marker { color: var(--accent); }
.tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.tag { font-size: .72rem; padding: .18rem .55rem; border-radius: 6px; background: var(--bg-sunken); color: var(--text-muted); }

.card-meta { border-top: 1px solid var(--line); padding-top: .9rem; display: flex; flex-direction: column; gap: .7rem; font-size: .82rem; color: var(--text-muted); }
.meta-row { display: flex; flex-wrap: wrap; gap: .5rem 1.1rem; align-items: center; }
.meta-row span { display: inline-flex; align-items: center; gap: .35rem; }
.meta-row svg { width: 14px; height: 14px; opacity: .8; }
.pill { font-size: .72rem; padding: .15rem .5rem; border-radius: 999px; border: 1px solid var(--line); color: var(--text-faint); }
.pill.private { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: var(--warn-soft); }

.langbar { display: flex; height: 8px; border-radius: 999px; overflow: hidden; background: var(--bg-sunken); }
.langbar span { display: block; height: 100%; }
.langkey { display: flex; flex-wrap: wrap; gap: .35rem .9rem; font-size: .75rem; }
.langkey span { display: inline-flex; align-items: center; gap: .35rem; }
.langkey i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

.card-foot { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: auto; }
.card-foot .btn svg { width: 14px; height: 14px; }

/* ---------- Activity list ---------- */
.activity { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: .75rem; }
.act {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: 12px; padding: .9rem 1rem;
  display: flex; flex-direction: column; gap: .3rem; color: var(--text);
}
.act:hover { text-decoration: none; border-color: var(--text-faint); }
.act .name { font-weight: 600; font-size: .95rem; display: flex; align-items: center; gap: .5rem; justify-content: space-between; }
.act .desc { font-size: .82rem; color: var(--text-muted); overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.act .foot { font-size: .75rem; color: var(--text-faint); display: flex; gap: .8rem; align-items: center; margin-top: .2rem; }
.act .foot i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: .3rem; vertical-align: middle; }

/* ---------- How it works ---------- */
.how {
  position: relative; isolation: isolate; border-block: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(11,12,26,.92), rgba(42,31,77,.78) 50%, rgba(11,12,26,.94)),
    url("../assets/img/bg-signup.jpg") center / cover fixed no-repeat;
}
:root[data-theme="light"] .how { background: linear-gradient(180deg, rgba(247,244,251,.92), rgba(231,220,250,.85) 50%, rgba(247,244,251,.94)), url("../assets/img/bg-signup.jpg") center / cover fixed no-repeat; }
.how .step, .how .codeblock { background: color-mix(in srgb, var(--bg-elev) 80%, transparent); backdrop-filter: blur(8px); }
@media (max-width: 900px) { .how { background-attachment: scroll; } }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); gap: 1rem; counter-reset: step; }
.step { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); font-family: var(--mono); color: var(--accent); font-size: .8rem; display: block; margin-bottom: .4rem; }
.step h3 { margin: 0 0 .35rem; font-size: 1rem; }
.step p { margin: 0; font-size: .875rem; color: var(--text-muted); }
.codeblock {
  margin-top: 1.25rem; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.2rem; overflow-x: auto; font-size: .8rem; line-height: 1.6; color: var(--text-muted);
}
.codeblock .k { color: var(--accent); }
.codeblock .s { color: var(--warn); }

/* ---------- Contact / footer ---------- */
.contact .cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: .75rem; }
.contact .c { background: var(--bg-elev); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.1rem; color: var(--text); display: flex; gap: .8rem; align-items: center; }
.contact .c:hover { text-decoration: none; border-color: var(--text-faint); }
.contact .c svg { width: 20px; height: 20px; color: var(--accent); flex: none; }
.contact .c small { display: block; color: var(--text-muted); font-size: .78rem; }
footer { border-top: 1px solid var(--line); padding: 1.5rem 0 2.5rem; color: var(--text-faint); font-size: .8rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; }

/* ---------- README modal ---------- */
dialog.readme {
  width: min(820px, 100% - 2rem); max-height: min(85vh, 900px); padding: 0; border: 1px solid var(--line);
  border-radius: 16px; background: var(--bg-elev); color: var(--text); box-shadow: var(--shadow);
}
dialog.readme::backdrop { background: rgba(0,0,0,.5); backdrop-filter: blur(3px); }
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.25rem; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--bg-elev); }
.modal-head strong { font-family: var(--mono); font-size: .9rem; }
.modal-body { padding: 1.25rem 1.5rem 1.75rem; overflow-y: auto; max-height: calc(85vh - 64px); }
.md h1, .md h2, .md h3 { letter-spacing: -.015em; margin-top: 1.5em; }
.md h1:first-child { margin-top: 0; }
.md pre { background: var(--bg-sunken); padding: .9rem 1rem; border-radius: 10px; overflow-x: auto; }
.md code { background: var(--bg-sunken); padding: .1em .35em; border-radius: 4px; }
.md pre code { background: none; padding: 0; }
.md img { display: inline-block; }
.md table { border-collapse: collapse; } .md td, .md th { border: 1px solid var(--line); padding: .35rem .6rem; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }

/* =====================================================================
   Story layer: progress, chapter dots, sky canvas, motion, new chapters
   ===================================================================== */

.progress { position: fixed; top: 0; left: 0; height: 2px; width: 0; z-index: 30; background: linear-gradient(90deg, var(--accent), var(--glow)); box-shadow: 0 0 12px var(--accent); }

.dots { position: fixed; right: 1.1rem; top: 50%; transform: translateY(-50%); z-index: 15; display: flex; flex-direction: column; gap: .9rem; }
.dots a { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--text-faint); opacity: .5; transition: all .25s ease; }
.dots a.active { background: var(--accent); opacity: 1; box-shadow: 0 0 0 4px var(--accent-soft), 0 0 14px var(--accent); }
.dots a::after { content: attr(data-label); position: absolute; right: 1.2rem; top: 50%; transform: translateY(-50%) translateX(6px); font-size: .7rem; font-family: var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); opacity: 0; white-space: nowrap; transition: all .2s ease; pointer-events: none; }
.dots a:hover::after, .dots a.active::after { opacity: 1; transform: translateY(-50%); }
@media (max-width: 900px) { .dots { display: none; } }

.sky { position: absolute; inset: 0; z-index: -1; pointer-events: none; will-change: transform; }
.hero-wrap { position: relative; z-index: 1; }
.hero .eyebrow { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; text-transform: none; letter-spacing: .02em; font-size: .8rem; }
.type { color: var(--accent); font-weight: 600; }
.caret { display: inline-block; width: 2px; height: 1em; background: var(--glow); margin-left: 2px; vertical-align: -0.15em; animation: blink 1s steps(2) infinite; }
@keyframes blink { to { opacity: 0; } }
.stat .value { font-size: 2rem; }
.scroll-cue { position: absolute; left: 50%; bottom: 1.5rem; transform: translateX(-50%); width: 26px; height: 42px; border: 2px solid rgba(255,255,255,.35); border-radius: 14px; z-index: 1; }
.scroll-cue span { position: absolute; left: 50%; top: 6px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--glow); animation: cue 1.8s ease-in-out infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(16px); opacity: 0; } 100% { opacity: 0; } }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.grid .reveal:nth-child(2) { transition-delay: .08s; } .grid .reveal:nth-child(3) { transition-delay: .16s; } .grid .reveal:nth-child(4) { transition-delay: .24s; }
.timeline .reveal:nth-child(n) { transition-delay: calc(var(--i, 0) * 60ms); }

/* tilt shine */
.tilt { transform-style: preserve-3d; transition: transform .25s ease, border-color .2s ease, box-shadow .2s ease; position: relative; overflow: hidden; }
.tilt::after { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s; background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(201,162,255,.16), transparent 45%); }
.tilt:hover::after { opacity: 1; }
.card.reveal.in { transform: none; }

/* cursor glow */
.cursor-glow { position: fixed; left: -300px; top: -300px; width: 600px; height: 600px; margin: -300px 0 0 -300px; border-radius: 50%; pointer-events: none; z-index: 0; opacity: 0; transition: opacity .6s; background: radial-gradient(circle, rgba(140,90,220,.14), rgba(245,163,184,.06) 35%, transparent 60%); mix-blend-mode: screen; }
:root[data-theme="light"] .cursor-glow { mix-blend-mode: multiply; background: radial-gradient(circle, rgba(140,90,220,.10), transparent 60%); }
main, header, footer { position: relative; z-index: 1; }

/* timeline */
.timeline { list-style: none; margin: 0; padding: 0 0 0 1.5rem; position: relative; }
.timeline::before { content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, var(--line), var(--accent) 60%, var(--glow)); }
.tl { position: relative; display: grid; grid-template-columns: 110px 1fr; gap: 1.25rem; padding: .7rem 0 .7rem 1.25rem; }
.tl::before { content: ""; position: absolute; left: -1.5rem; top: 1.1rem; width: 12px; height: 12px; border-radius: 50%; background: var(--bg); border: 2px solid var(--text-faint); box-sizing: border-box; }
.tl.kaggle::before { border-color: #20beff; background: color-mix(in srgb, #20beff 40%, var(--bg)); box-shadow: 0 0 10px rgba(32,190,255,.5); }
.tl.now::before { border-color: var(--glow); background: var(--glow); box-shadow: 0 0 0 4px color-mix(in srgb, var(--glow) 25%, transparent), 0 0 14px var(--glow); animation: pulse 1.8s ease-in-out infinite; }
.tl-when { font-family: var(--mono); font-size: .8rem; color: var(--text-muted); padding-top: .15rem; }
.tl.now .tl-when { color: var(--glow); }
.tl-body { display: flex; flex-direction: column; gap: .1rem; }
.tl-title { font-weight: 600; color: var(--text); }
.tl-note { font-size: .82rem; color: var(--text-muted); }
@media (max-width: 560px) { .tl { grid-template-columns: 1fr; gap: .1rem; } }

/* now chapter */
.now-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 1.25rem; margin-bottom: 1.25rem; }
@media (max-width: 800px) { .now-grid { grid-template-columns: 1fr; } }
.panel { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem 1.35rem; box-shadow: var(--shadow); }
.panel h3 { margin: 0 0 .9rem; font-size: .8rem; font-family: var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); }
.feed { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .75rem; }
.feed li { display: flex; flex-direction: column; gap: .15rem; padding-left: 1rem; border-left: 2px solid var(--line); }
.feed li:first-child { border-color: var(--glow); }
.feed-msg { color: var(--text); font-weight: 500; font-size: .95rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.feed-meta { font-size: .78rem; color: var(--text-faint); } .feed-meta b { color: var(--text-muted); font-weight: 500; }
.donut-wrap { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.donut { width: 150px; height: 150px; border-radius: 50%; background: var(--pie, conic-gradient(var(--line) 0 100%)); display: grid; place-items: center; flex: none; transform: scale(.85) rotate(-20deg); opacity: .4; transition: transform .9s cubic-bezier(.2,.7,.2,1), opacity .9s; }
.donut.ready { transform: none; opacity: 1; }
.donut-hole { width: 98px; height: 98px; border-radius: 50%; background: var(--bg-elev); display: grid; place-content: center; text-align: center; }
.donut-hole strong { font-size: 1.35rem; letter-spacing: -.02em; } .donut-hole small { font-size: .68rem; color: var(--text-faint); }
.donut-key { list-style: none; margin: 0; padding: 0; font-size: .82rem; display: flex; flex-direction: column; gap: .35rem; color: var(--text-muted); }
.donut-key i { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-right: .5rem; vertical-align: middle; }
.donut-key b { color: var(--text); font-weight: 600; margin-left: .3rem; }

/* backstage meter */
.steps .step p { font-size: .82rem; }
.meter { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1.5rem; margin-top: 1.25rem; padding: .8rem 1.1rem; border: 1px solid var(--line); border-radius: 999px; background: color-mix(in srgb, var(--bg-elev) 80%, transparent); font-size: .82rem; color: var(--text-muted); font-family: var(--mono); }
.meter strong { color: var(--text); }
.meter a { margin-left: auto; }
.meter > span:first-child { display: inline-flex; align-items: center; gap: .5rem; color: var(--glow); }

/* trim */
.card .summary { font-size: 1rem; }
.card-body ul { font-size: .85rem; }
.section-head p { font-size: .95rem; }
.feed-meta code { font-size: .72rem; color: var(--text-faint); }

/* ===== v6: ticker, heatmap, palette, timeline draw, magnet, kbd ===== */
.kbd-btn { display: inline-flex; gap: 2px; border: 1px solid var(--line); background: var(--bg-elev); border-radius: 8px; padding: .3rem .4rem; cursor: pointer; color: var(--text-muted); }
.kbd-btn:hover { border-color: var(--text-faint); color: var(--text); }
kbd { font-family: var(--mono); font-size: .68rem; padding: .05rem .3rem; border-radius: 4px; background: var(--bg-sunken); border: 1px solid var(--line); color: inherit; }
@media (max-width: 640px) { .nav-links li:not(:last-child):not(:nth-last-child(2)) { display: none; } }

.ticker { overflow: hidden; border-block: 1px solid var(--line); background: color-mix(in srgb, var(--bg-elev) 60%, transparent); padding: .6rem 0; opacity: 0; transition: opacity .8s; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.ticker.ready { opacity: 1; }
.ticker-track { display: flex; gap: 2.2rem; width: max-content; animation: ticker calc(var(--n, 12) * 2.6s) linear infinite; }
.ticker:hover .ticker-track { animation-play-state: paused; }
@keyframes ticker { to { transform: translateX(-50%); } }
.tk { display: inline-flex; align-items: center; gap: .45rem; font-family: var(--mono); font-size: .78rem; color: var(--text-muted); white-space: nowrap; }
.tk i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.tk b { color: var(--text); font-weight: 600; }
.tag-tk { color: var(--accent); }

.timeline { --draw: 0; }
.timeline::before { transform-origin: top; transform: scaleY(var(--draw)); transition: transform .15s linear; }
.tl::before { transition: border-color .4s, background .4s; }

.heat { margin-top: 2.5rem; padding: 1.1rem 1.2rem; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow-x: auto; }
.heat-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: .8rem; }
.heat-head .eyebrow { display: inline-flex; align-items: center; gap: .5rem; text-transform: none; letter-spacing: .02em; }
.heat-total { font-family: var(--mono); font-size: .8rem; color: var(--text-muted); }
.heat-grid { display: grid; grid-template-rows: repeat(7, 11px); grid-auto-flow: column; grid-auto-columns: 11px; gap: 3px; min-width: 740px; }
.heat-grid i, .heat-legend i { display: block; width: 11px; height: 11px; border-radius: 2.5px; background: var(--bg-sunken); border: 1px solid color-mix(in srgb, var(--line) 60%, transparent); }
.heat.ready .heat-grid i { animation: pop .5s ease both; animation-delay: calc(var(--d) * 1.2ms); }
@keyframes pop { from { opacity: 0; transform: scale(.4); } to { opacity: 1; transform: none; } }
.l1 { background: color-mix(in srgb, var(--accent) 30%, var(--bg-sunken)) !important; }
.l2 { background: color-mix(in srgb, var(--accent) 55%, var(--bg-sunken)) !important; }
.l3 { background: color-mix(in srgb, var(--accent) 80%, var(--glow)) !important; }
.l4 { background: var(--glow) !important; box-shadow: 0 0 8px var(--glow); }
.heat-legend { display: flex; align-items: center; gap: 4px; margin-top: .7rem; font-size: .72rem; color: var(--text-faint); }
.heat-legend span { margin: 0 .3rem; }

.palette { width: min(560px, 100% - 2rem); padding: 0; border: 1px solid var(--line); border-radius: 16px; background: var(--bg-elev); color: var(--text); box-shadow: var(--shadow); margin-top: 12vh; }
.palette::backdrop { background: rgba(5,5,15,.55); backdrop-filter: blur(4px); }
.palette input { width: 100%; box-sizing: border-box; font: inherit; font-size: 1rem; padding: 1rem 1.2rem; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--text); outline: none; }
.palette ul { list-style: none; margin: 0; padding: .4rem; max-height: 50vh; overflow-y: auto; }
.palette li { display: grid; grid-template-columns: 70px 1fr auto; gap: .8rem; align-items: center; padding: .55rem .8rem; border-radius: 10px; cursor: pointer; font-size: .92rem; }
.palette li[aria-selected="true"] { background: var(--accent-soft); }
.p-group { font-family: var(--mono); font-size: .68rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); }
.p-hint { font-size: .78rem; color: var(--text-faint); max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.p-empty { color: var(--text-muted); justify-content: center; display: flex !important; }
.palette-foot { display: flex; gap: 1.2rem; padding: .6rem 1.2rem; border-top: 1px solid var(--line); font-size: .72rem; color: var(--text-faint); }
.palette-foot kbd { margin-right: .25rem; }

.hero .btn, .chip, .contact .c { transition: transform .18s ease, border-color .15s ease; will-change: transform; }
:root[data-sky="day"] .hero::after { background:
  linear-gradient(180deg, rgba(11,12,26,.35) 0%, rgba(11,12,26,.15) 40%, rgba(11,12,26,.55) 78%, var(--bg) 100%),
  linear-gradient(180deg, rgba(60,50,120,.75) 0%, rgba(120,80,150,.55) 40%, rgba(200,120,140,.5) 62%, rgba(246,170,120,.55) 80%, rgba(250,210,150,.4) 90%, rgba(11,12,26,.7) 100%); }

.tl.build::before { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 40%, var(--bg)); box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 50%, transparent); }
footer { gap: .5rem 1.5rem; }
#footer-host { font-family: var(--mono); font-size: .72rem; color: var(--accent); }