/* NeuroScope - one stylesheet. Colours are tokens so light/dark swap in one place.
   Brand = violet -> pink gradient; data charts keep the validated categorical palette (--c1..--c8). */
:root {
  color-scheme: light;
  --page: #f4f5fb;
  --card: #ffffff;
  --surface: #fbfbfe;
  --sunken: #f0f1f8;
  --ink: #12142b;
  --ink-2: #4b5170;
  --muted: #868ca8;
  --grid: #e5e7f1;
  --axis: #c7cbe0;
  --border: rgba(18, 20, 43, 0.09);
  --border-strong: rgba(18, 20, 43, 0.17);
  --accent: #6d4aff;
  --accent-ink: #5231e6;
  --accent-wash: rgba(109, 74, 255, 0.10);
  --accent-2: #ec4899;
  --accent-3: #06b6d4;
  --grad: linear-gradient(135deg, #6d4aff 0%, #a855f7 50%, #ec4899 100%);
  --grad-cool: linear-gradient(135deg, #06b6d4 0%, #6d4aff 100%);
  --grad-warm: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);
  --glow: 0 10px 30px -8px rgba(109, 74, 255, .45);
  --good: #0ca30c;
  --good-ink: #067a06;
  --warn: #fab219;
  --serious: #ec835a;
  --bad: #d03b3b;
  --neg: #2a78d6;
  --pos: #e34948;
  --mid: #f0efec;
  --c1: #2a78d6; --c2: #eb6834; --c3: #1baf7a; --c4: #eda100;
  --c5: #e87ba4; --c6: #008300; --c7: #4a3aa7; --c8: #e34948;
  /* one colour per step and per layer type */
  --s-data: #06b6d4; --s-prep: #10b981; --s-model: #8b5cf6; --s-viz: #ec4899; --s-train: #f97316; --s-eval: #3b82f6;
  --k-linear: #8b5cf6; --k-conv: #3b82f6; --k-activation: #f59e0b; --k-pool: #14b8a6; --k-norm: #84cc16;
  --k-dropout: #94a3b8; --k-embedding: #ec4899; --k-recurrent: #f97316; --k-attention: #d946ef;
  --k-flatten: #64748b; --k-group: #6366f1; --k-other: #94a3b8; --k-input: #06b6d4; --k-output: #10b981; --k-loss: #ef4444;
  --shadow: 0 1px 2px rgba(18,20,43,.04), 0 6px 22px -6px rgba(18,20,43,.10);
  --shadow-lift: 0 2px 4px rgba(18,20,43,.05), 0 14px 34px -10px rgba(76, 52, 200, .28);
  --bg-art: radial-gradient(1100px 520px at 0% -8%, rgba(109,74,255,.13), transparent 60%),
            radial-gradient(900px 480px at 105% 0%, rgba(236,72,153,.10), transparent 60%),
            radial-gradient(800px 600px at 50% 120%, rgba(6,182,212,.08), transparent 60%);
  --radius: 14px;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #090b1a; --card: #11152e; --surface: #11152e; --sunken: #181d3b;
    --ink: #eef0ff; --ink-2: #b6bbd9; --muted: #7e85a8; --grid: #232849; --axis: #353c66;
    --border: rgba(255,255,255,.08); --border-strong: rgba(255,255,255,.16);
    --accent: #8b6dff; --accent-ink: #b6a5ff; --accent-wash: rgba(139,109,255,.16);
    --good-ink: #22c55e; --mid: #383835; --neg: #3987e5; --pos: #e66767;
    --c1: #3987e5; --c2: #d95926; --c3: #199e70; --c4: #c98500;
    --c5: #d55181; --c6: #008300; --c7: #9085e9; --c8: #e66767;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -8px rgba(0,0,0,.5);
    --shadow-lift: 0 2px 6px rgba(0,0,0,.4), 0 16px 36px -10px rgba(139,109,255,.35);
    --bg-art: radial-gradient(1100px 520px at 0% -8%, rgba(109,74,255,.22), transparent 60%),
              radial-gradient(900px 480px at 105% 0%, rgba(236,72,153,.14), transparent 60%),
              radial-gradient(800px 600px at 50% 120%, rgba(6,182,212,.10), transparent 60%);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #090b1a; --card: #11152e; --surface: #11152e; --sunken: #181d3b;
  --ink: #eef0ff; --ink-2: #b6bbd9; --muted: #7e85a8; --grid: #232849; --axis: #353c66;
  --border: rgba(255,255,255,.08); --border-strong: rgba(255,255,255,.16);
  --accent: #8b6dff; --accent-ink: #b6a5ff; --accent-wash: rgba(139,109,255,.16);
  --good-ink: #22c55e; --mid: #383835; --neg: #3987e5; --pos: #e66767;
  --c1: #3987e5; --c2: #d95926; --c3: #199e70; --c4: #c98500;
  --c5: #d55181; --c6: #008300; --c7: #9085e9; --c8: #e66767;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -8px rgba(0,0,0,.5);
  --shadow-lift: 0 2px 6px rgba(0,0,0,.4), 0 16px 36px -10px rgba(139,109,255,.35);
  --bg-art: radial-gradient(1100px 520px at 0% -8%, rgba(109,74,255,.22), transparent 60%),
            radial-gradient(900px 480px at 105% 0%, rgba(236,72,153,.14), transparent 60%),
            radial-gradient(800px 600px at 50% 120%, rgba(6,182,212,.10), transparent 60%);
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--page); color: var(--ink); font: 14px/1.45 var(--sans); -webkit-font-smoothing: antialiased; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent-ink); }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; }
h1 { font-size: 22px; font-weight: 650; }
h2 { font-size: 17px; font-weight: 650; }
h3 { font-size: 14px; font-weight: 650; }
h4 { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
p { margin: 0; }
code, .mono { font-family: var(--mono); font-size: 12.5px; }
.muted { color: var(--muted); }
.ink2 { color: var(--ink-2); }
.small { font-size: 12px; }
.tnum { font-variant-numeric: tabular-nums; }
.hidden { display: none !important; }
.grow { flex: 1; min-width: 0; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.nowrap { flex-wrap: nowrap; }
.col { display: flex; flex-direction: column; gap: 10px; }
.between { justify-content: space-between; }
.gap-lg { gap: 18px; }
.mt { margin-top: 12px; } .mt-lg { margin-top: 20px; } .mb { margin-bottom: 12px; }

/* ---------- top bar ---------- */
.topbar { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 18px; padding: 0 18px;
  height: 56px; background: var(--card); border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 16px; letter-spacing: -.01em; white-space: nowrap; }
.steps { display: flex; gap: 2px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.steps::-webkit-scrollbar { display: none; }
.step { display: flex; align-items: center; gap: 7px; padding: 7px 12px; border-radius: 8px; border: 0; background: none;
  color: var(--ink-2); cursor: pointer; white-space: nowrap; font-weight: 500; }
.step:hover { background: var(--sunken); color: var(--ink); }
.step .n { width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font-size: 11px; font-weight: 700;
  border: 1.5px solid var(--axis); color: var(--muted); }
.step.done .n { background: var(--good); border-color: var(--good); color: #fff; }
.step.active { background: var(--accent-wash); color: var(--accent-ink); }
.step.active .n { border-color: var(--accent); color: var(--accent-ink); }
.step.done.active .n { background: var(--accent); border-color: var(--accent); color: #fff; }
.top-actions { display: flex; gap: 6px; }
.statusline { display: flex; gap: 8px; padding: 8px 18px; font-size: 12px; color: var(--ink-2); flex-wrap: wrap; min-height: 34px;
  border-bottom: 1px solid var(--border); background: var(--surface); }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 2px 9px; border-radius: 99px; background: var(--sunken);
  border: 1px solid var(--border); white-space: nowrap; font-size: 12px; }
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.pill.good .dot { background: var(--good); } .pill.warn .dot { background: var(--warn); } .pill.run .dot { background: var(--accent); animation: pulse 1s infinite; }
.pill.bad .dot { background: var(--bad); }
@keyframes pulse { 50% { opacity: .3; } }

main { max-width: 1480px; margin: 0 auto; padding: 18px 18px 60px; }
.page { display: none; }
.page.show { display: block; animation: fade .18s ease-out; }
@keyframes fade { from { opacity: 0; transform: translateY(3px); } }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.page-head p { color: var(--ink-2); margin-top: 4px; max-width: 760px; }

/* ---------- cards / layout ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); min-width: 0; }
.card.flat { box-shadow: none; }
.card.pad-sm { padding: 12px; }
.card > h3, .card > .card-head { margin-bottom: 12px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.grid { display: grid; gap: 14px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.split { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 16px; align-items: start; }
.split.wide-left { grid-template-columns: minmax(0, 1fr) 380px; }
.sticky { position: sticky; top: 104px; }
@media (max-width: 1100px) { .split, .split.wide-left { grid-template-columns: 1fr; } .sticky { position: static; } .g4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 760px) { .g2, .g3, .g4 { grid-template-columns: 1fr; } main { padding: 12px 12px 60px; } .topbar { gap: 8px; padding: 0 10px; } .brand span { display: none; } .step { padding: 6px 8px; } .step .lbl { display: none; } }

.empty { padding: 36px 20px; text-align: center; color: var(--muted); border: 1.5px dashed var(--border-strong); border-radius: var(--radius); }
.empty h3 { color: var(--ink-2); margin-bottom: 6px; }
.empty .btn { margin-top: 12px; }
.note { padding: 10px 12px; border-radius: 8px; background: var(--accent-wash); color: var(--ink); font-size: 13px; }
.note.warn { background: rgba(250, 178, 25, .14); }
.note.bad { background: rgba(208, 59, 59, .10); }
.note.good { background: rgba(12, 163, 12, .10); }
.notes { display: flex; flex-direction: column; gap: 6px; }

/* ---------- buttons & inputs ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 8px 14px; border-radius: 8px;
  border: 1px solid var(--border-strong); background: var(--card); cursor: pointer; font-weight: 550; white-space: nowrap;
  transition: background .12s, border-color .12s; line-height: 1.2; }
.btn:hover { background: var(--sunken); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.07); }
.btn.danger { color: var(--bad); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--sunken); }
.btn.sm { padding: 5px 10px; font-size: 13px; }
.btn.xs { padding: 2px 7px; font-size: 12px; border-radius: 6px; }
.btn.icon { width: 32px; padding: 5px 0; }
.btn.lg { padding: 11px 20px; font-size: 15px; }
.seg { display: inline-flex; background: var(--sunken); border-radius: 9px; padding: 3px; gap: 2px; border: 1px solid var(--border); flex-wrap: wrap; }
.seg button { border: 0; background: none; padding: 6px 12px; border-radius: 7px; cursor: pointer; color: var(--ink-2); font-weight: 550; }
.seg button.on { background: var(--card); color: var(--ink); box-shadow: 0 1px 2px rgba(0,0,0,.12); }
.seg.sm button { padding: 3px 9px; font-size: 12.5px; }
input[type=text], input[type=number], input:not([type]), select, textarea {
  border: 1px solid var(--border-strong); background: var(--surface); border-radius: 7px; padding: 6px 9px; min-width: 0; }
input:focus, select:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { width: 100%; resize: vertical; }
select { padding-right: 6px; }
input[type=number] { width: 90px; }
input[type=range] { accent-color: var(--accent); }
input[type=checkbox], input[type=radio] { accent-color: var(--accent); width: 15px; height: 15px; margin: 0; }
label.chk { display: flex; gap: 8px; align-items: flex-start; cursor: pointer; padding: 3px 0; }
label.chk > input { margin-top: 2px; flex: none; }
label.chk small { display: block; color: var(--muted); font-size: 12px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field > span { font-size: 12px; color: var(--ink-2); font-weight: 550; }
.field > small { color: var(--muted); font-size: 11.5px; }
.fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
.form-sec { padding: 12px 0; border-top: 1px solid var(--border); }
.form-sec:first-child { border-top: 0; padding-top: 0; }
.form-sec > h4 { margin-bottom: 8px; }
.form-sec > select, .field > select, .field > input:not([type=checkbox]):not([type=radio]) { max-width: 100%; }
.form-sec > select { width: 100%; }
.radios { display: flex; flex-direction: column; gap: 2px; }

/* ---------- tables ---------- */
.tbl-wrap { overflow: auto; max-width: 100%; border: 1px solid var(--border); border-radius: 8px; }
table.tbl { border-collapse: collapse; width: 100%; font-size: 12.5px; }
.tbl th, .tbl td { padding: 6px 10px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
.tbl th { background: var(--sunken); font-weight: 600; color: var(--ink-2); position: sticky; top: 0; }
.tbl td.num, .tbl th.num { text-align: right; font-variant-numeric: tabular-nums; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td.wrap { white-space: normal; min-width: 240px; }
.tbl tr.sel td { background: var(--accent-wash); }
.tbl tr.click { cursor: pointer; } .tbl tr.click:hover td { background: var(--sunken); }

/* ---------- dataset picker ---------- */
.ds-group { margin-bottom: 18px; }
.ds-group > h4 { margin-bottom: 8px; }
.ds-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.ds-card { text-align: left; padding: 12px 13px; border: 1px solid var(--border); border-radius: 9px; background: var(--card); cursor: pointer;
  display: flex; flex-direction: column; gap: 4px; transition: border-color .12s, transform .12s; }
.ds-card:hover { border-color: var(--accent); }
.ds-card.on { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; background: var(--accent-wash); }
.ds-card b { font-weight: 600; }
.ds-card span { color: var(--ink-2); font-size: 12.5px; }
.kind-tag { font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.drop { border: 1.5px dashed var(--border-strong); border-radius: 10px; padding: 22px; text-align: center; cursor: pointer; color: var(--ink-2); }
.drop.over { border-color: var(--accent); background: var(--accent-wash); }
.gallery { display: flex; flex-direction: column; gap: 8px; }
.gallery .g-row { display: flex; gap: 6px; align-items: center; }
.gallery .g-row > b { width: 110px; font-size: 12px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gallery img, .thumb { width: 44px; height: 44px; image-rendering: pixelated; border-radius: 4px; border: 1px solid var(--border); object-fit: cover; background: #000; }

/* ---------- text pipeline trace ---------- */
.trace-ex { border: 1px solid var(--border); border-radius: 9px; overflow: hidden; margin-bottom: 12px; }
.trace-ex .ex-head { padding: 8px 12px; background: var(--sunken); display: flex; justify-content: space-between; gap: 8px; font-size: 12px; }
.tstep { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 10px; padding: 7px 12px; border-top: 1px solid var(--border); }
.tstep.same { opacity: .55; }
.tstep .sname { font-size: 12px; font-weight: 600; color: var(--ink-2); }
.tstep .sname small { display: block; font-weight: 400; color: var(--muted); font-size: 11px; line-height: 1.3; }
.tstep .sval { font-family: var(--mono); font-size: 12px; word-break: break-word; }
.tok { display: inline-block; padding: 1px 6px; margin: 2px 3px 2px 0; border-radius: 5px; background: var(--sunken); border: 1px solid var(--border); font-family: var(--mono); font-size: 12px; }
.tok.gone { text-decoration: line-through; color: var(--bad); border-color: rgba(208,59,59,.3); background: rgba(208,59,59,.07); }
.tok.chg { border-color: var(--c2); background: rgba(235,104,52,.10); }
.tok.pad { opacity: .35; }

/* ---------- model builder ---------- */
.layer-stack { display: flex; flex-direction: column; gap: 0; }
.lcard { border: 1px solid var(--border); border-radius: 10px; background: var(--card); padding: 10px 12px; position: relative; }
.lcard.err { border-color: var(--bad); box-shadow: 0 0 0 1px var(--bad) inset; }
.lcard.io { background: var(--sunken); }
.lcard .lhead { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lcard .lhead .idx { width: 22px; height: 22px; border-radius: 6px; background: var(--sunken); display: grid; place-items: center; font-size: 11px; font-weight: 700; color: var(--ink-2); }
.lcard .lhead select.ltype { font-weight: 600; }
.lcard .shape { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--ink-2); display: flex; gap: 8px; align-items: center; }
.lcard .lparams { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-top: 9px; align-items: flex-end; }
.lcard .lparams .field input[type=number] { width: 78px; }
.lcard .ldoc { font-size: 12px; color: var(--muted); margin-top: 6px; }
.lcard .lerr { color: var(--bad); font-size: 12.5px; margin-top: 6px; font-weight: 550; }
.lcard .lacts { display: flex; gap: 2px; }
.lcard .lacts .btn { padding: 2px 6px; }
.connector { height: 18px; display: flex; justify-content: center; position: relative; }
.connector::before { content: ""; width: 2px; background: var(--axis); }
.connector .ins { position: absolute; top: 0; height: 18px; width: 18px; border-radius: 50%; border: 1px solid var(--border-strong); background: var(--card);
  font-size: 13px; line-height: 15px; text-align: center; cursor: pointer; opacity: 0; transition: opacity .1s; color: var(--ink-2); padding: 0; }
.connector:hover .ins { opacity: 1; }
.auto-badge { font-size: 10.5px; background: var(--sunken); border: 1px solid var(--border); border-radius: 5px; padding: 0 5px; color: var(--muted); }
.act-pick { display: flex; align-items: center; gap: 6px; }
.act-pick svg { flex: none; }
.neuron-acts { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; width: 100%; }
.neuron-acts select { font-size: 11.5px; padding: 2px 3px; }
.neuron-acts .na { display: flex; flex-direction: column; align-items: center; gap: 1px; font-size: 10px; color: var(--muted); }
.add-menu { display: flex; flex-direction: column; gap: 10px; }
.add-menu .grp { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.add-menu .grp > span { width: 100px; font-size: 12px; color: var(--muted); font-weight: 600; }
.preset-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { padding: 6px 11px; border-radius: 99px; border: 1px solid var(--border-strong); background: var(--card); cursor: pointer; font-size: 12.5px; font-weight: 550; }
.chip:hover { border-color: var(--accent); color: var(--accent-ink); }
.chip.on { background: var(--accent); color: #fff; border-color: var(--accent); }
.zoo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.zoo-card { border: 1px solid var(--border); border-radius: 10px; padding: 13px; background: var(--card); display: flex; flex-direction: column; gap: 8px; }
.zoo-card .facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 3px 10px; font-size: 12px; color: var(--ink-2); }
.zoo-card .facts b { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.tree { font-size: 12.5px; max-height: 560px; overflow: auto; }
.tree .tn { display: grid; grid-template-columns: minmax(0,1fr) 110px 70px; gap: 8px; padding: 3px 4px; border-radius: 5px; align-items: center; }
.tree .tn:hover { background: var(--sunken); }
.tree .tn .nm { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tree .tn .nm .tg { cursor: pointer; display: inline-block; width: 14px; color: var(--muted); }
.tree .tn .shp { font-family: var(--mono); font-size: 11.5px; color: var(--ink-2); }
.tree .tn .prm { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.code-area { font-family: var(--mono); font-size: 12.5px; min-height: 360px; line-height: 1.5; tab-size: 4; background: var(--sunken); }
pre.code { background: var(--sunken); padding: 12px; border-radius: 8px; overflow: auto; font-size: 12px; max-height: 420px; margin: 0; }

/* ---------- visualize ---------- */
.viz-bar { display: flex; gap: 10px 16px; align-items: center; flex-wrap: wrap; }
.viz-bar .grpbox { display: flex; gap: 6px; align-items: center; }
.viz-bar .lbl { font-size: 12px; color: var(--muted); font-weight: 600; }
.viz-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr) 320px; gap: 14px; align-items: start; margin-top: 14px; }
@media (max-width: 1250px) { .viz-layout { grid-template-columns: 230px minmax(0,1fr); } .viz-layout > .viz-right { grid-column: 1 / -1; } }
@media (max-width: 800px) { .viz-layout { grid-template-columns: 1fr; } }
.flow { position: relative; display: flex; gap: 0; overflow-x: auto; padding: 6px 2px 12px; align-items: stretch; scroll-behavior: smooth; }
.fcard { flex: none; width: 128px; border: 1px solid var(--border); border-radius: 10px; background: var(--card); padding: 8px; cursor: pointer;
  display: flex; flex-direction: column; gap: 5px; transition: border-color .15s, box-shadow .2s, opacity .2s; position: relative; }
.fcard:hover { border-color: var(--border-strong); }
.fcard.sel { border-color: var(--accent); box-shadow: 0 0 0 1.5px var(--accent) inset; }
.fcard.pending { opacity: .38; }
.fcard.fwd-now { box-shadow: 0 0 0 3px rgba(42,120,214,.35); border-color: var(--accent); }
.fcard.bwd-now { box-shadow: 0 0 0 3px rgba(227,73,72,.35); border-color: var(--pos); }
.fcard .fname { font-weight: 650; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fcard .ftype { font-size: 11px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fcard .fshape { font-family: var(--mono); font-size: 10.5px; color: var(--ink-2); }
.fcard .fimg { width: 100%; height: 76px; object-fit: contain; image-rendering: pixelated; background: var(--sunken); border-radius: 5px; }
.fcard .fimg.empty { display: grid; place-items: center; font-size: 11px; color: var(--muted); }
.fcard .fstat { font-size: 10.5px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.fcard .fbar { height: 4px; border-radius: 2px; background: var(--sunken); overflow: hidden; }
.fcard .fbar > i { display: block; height: 100%; background: var(--pos); }
.fcard .expand { position: absolute; top: 5px; right: 5px; font-size: 10px; padding: 0 4px; }
.fcard.child { width: 112px; background: var(--surface); }
.fcard.group-open { border-style: dashed; }
.farrow { flex: none; width: 22px; display: flex; align-items: center; justify-content: center; color: var(--axis); font-size: 14px; }
.farrow.lit-f { color: var(--accent); } .farrow.lit-b { color: var(--pos); }
.phase-legend { display: flex; gap: 14px; font-size: 12px; color: var(--ink-2); align-items: center; }
.phase-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 4px; vertical-align: -1px; }
.detail-tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin: 0 -16px 14px; padding: 0 12px; overflow-x: auto; }
.detail-tabs button { border: 0; background: none; padding: 9px 12px; cursor: pointer; color: var(--ink-2); font-weight: 550; border-bottom: 2px solid transparent; white-space: nowrap; }
.detail-tabs button.on { color: var(--accent-ink); border-bottom-color: var(--accent); }
.detail-tabs button:disabled { opacity: .35; cursor: default; }
.maps-img { max-width: 100%; image-rendering: pixelated; border-radius: 6px; cursor: crosshair; display: block; }
.stat-row { display: flex; gap: 6px 14px; flex-wrap: wrap; font-size: 12px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.stat-row b { color: var(--ink); font-weight: 600; }
.math { background: var(--sunken); border-radius: 8px; padding: 12px 14px; font-size: 13.5px; line-height: 1.7; }
.math .eq { font-family: "Cambria Math", "STIX Two Math", Georgia, serif; font-size: 15px; display: block; margin: 4px 0; }
.math .eq.fwd { color: var(--accent-ink); } .math .eq.bwd { color: var(--pos); }
.nterm-tbl td, .nterm-tbl th { padding: 4px 8px; }
.input-view img { width: 100%; image-rendering: pixelated; border-radius: 8px; border: 1px solid var(--border); }
.tokens-hl { display: flex; flex-wrap: wrap; gap: 3px 2px; line-height: 1.9; font-size: 13px; }
.tokens-hl span { padding: 2px 4px; border-radius: 4px; margin-right: 2px; }
.pbar { display: grid; grid-template-columns: minmax(60px, 120px) minmax(0,1fr) 54px; gap: 6px; align-items: center; font-size: 12px; margin: 3px 0; }
.pbar .nm { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pbar .track { height: 14px; background: var(--sunken); border-radius: 3px; position: relative; overflow: hidden; }
.pbar .track > i { position: absolute; top: 0; bottom: 0; left: 0; background: var(--axis); border-radius: 0 3px 3px 0; }
.pbar.pred .track > i { background: var(--accent); }
.pbar.tgt .nm { font-weight: 700; }
.pbar .v { text-align: right; font-variant-numeric: tabular-nums; }
.dbar { display: grid; grid-template-columns: minmax(60px, 130px) minmax(0,1fr) 64px; gap: 6px; align-items: center; font-size: 12px; margin: 3px 0; }
.dbar .track { height: 12px; position: relative; }
.dbar .track::before { content: ""; position: absolute; left: 50%; top: -2px; bottom: -2px; width: 1px; background: var(--axis); }
.dbar .track > i { position: absolute; top: 0; bottom: 0; border-radius: 2px; }
.dbar .nm { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dbar .v { text-align: right; font-variant-numeric: tabular-nums; }
.netgraph { width: 100%; overflow-x: auto; }
.netgraph svg { display: block; }
.netgraph .neuron { cursor: pointer; }
.netgraph .neuron:hover circle, .netgraph .neuron:hover rect { stroke: var(--ink); stroke-width: 2; }

/* ---------- charts ---------- */
.chart { position: relative; width: 100%; }
.chart svg { display: block; overflow: visible; }
.chart text { fill: var(--muted); font-size: 11px; font-family: var(--sans); }
.chart .gridline { stroke: var(--grid); stroke-width: 1; }
.chart .axisline { stroke: var(--axis); stroke-width: 1; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 12px; color: var(--ink-2); margin-bottom: 6px; }
.legend i { display: inline-block; width: 12px; height: 3px; border-radius: 2px; margin-right: 5px; vertical-align: 3px; }
.legend i.dash { background-image: linear-gradient(90deg, currentColor 50%, transparent 50%) !important; background-size: 5px 3px; }
.chart-title { font-size: 12.5px; font-weight: 600; color: var(--ink-2); margin-bottom: 4px; display: flex; justify-content: space-between; gap: 8px; }
.tooltip { position: fixed; z-index: 100; pointer-events: none; background: var(--card); color: var(--ink); border: 1px solid var(--border-strong);
  border-radius: 7px; padding: 6px 9px; font-size: 12px; box-shadow: 0 4px 16px rgba(0,0,0,.14); opacity: 0; transition: opacity .08s; max-width: 320px; font-variant-numeric: tabular-nums; }
.tooltip.show { opacity: 1; }
.tooltip .tt-row { display: flex; gap: 8px; align-items: center; justify-content: space-between; }
.tooltip .sw { width: 9px; height: 9px; border-radius: 2px; display: inline-block; margin-right: 5px; }
.stat-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.tile { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.tile .k { font-size: 12px; color: var(--ink-2); font-weight: 550; }
.tile .v { font-size: 26px; font-weight: 650; letter-spacing: -.01em; margin-top: 2px; }
.tile .s { font-size: 11.5px; color: var(--muted); }
.cm-cell { cursor: pointer; }
.cm-cell:hover { stroke: var(--ink); stroke-width: 1.5; }
.sample-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.sample { border: 1px solid var(--border); border-radius: 8px; padding: 7px; cursor: pointer; display: flex; gap: 8px; align-items: flex-start; font-size: 12px; background: var(--card); }
.sample:hover { border-color: var(--accent); }
.sample .st { flex: 1; min-width: 0; }
.sample .st .txt { color: var(--ink-2); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.sample .bad { color: var(--bad); font-weight: 600; }
.sample .ok { color: var(--good-ink); font-weight: 600; }
.progress { height: 8px; background: var(--sunken); border-radius: 4px; overflow: hidden; }
.progress > i { display: block; height: 100%; background: var(--accent); transition: width .25s; }
.boundary-wrap { position: relative; width: 100%; aspect-ratio: 1; max-width: 420px; }
.boundary-wrap img { position: absolute; inset: 0; width: 100%; height: 100%; border-radius: 8px; image-rendering: auto; }
.boundary-wrap svg { position: absolute; inset: 0; }
.drawpad { border: 1px solid var(--border-strong); border-radius: 8px; touch-action: none; cursor: crosshair; background: #000; display: block; }
.diag { display: flex; gap: 10px; align-items: flex-start; padding: 9px 11px; border-radius: 8px; background: var(--sunken); font-size: 13px; }
.diag .ic { font-weight: 800; width: 18px; text-align: center; flex: none; }
.diag.warn .ic { color: #b07a00; } .diag.bad .ic { color: var(--bad); } .diag.good .ic { color: var(--good-ink); } .diag.info .ic { color: var(--accent-ink); }

/* ---------- modal & toasts ---------- */
.modal-back { position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 60; display: grid; place-items: center; padding: 16px; animation: fade .12s; }
.modal { background: var(--card); border-radius: 12px; width: min(760px, 100%); max-height: 88vh; display: flex; flex-direction: column; box-shadow: 0 16px 48px rgba(0,0,0,.25); border: 1px solid var(--border); }
.modal.wide { width: min(1100px, 100%); }
.modal .m-head { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.modal .m-body { padding: 16px 18px; overflow: auto; }
.modal .m-foot { padding: 12px 18px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }
.toasts { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 8px; z-index: 120; }
.toast { background: var(--ink); color: var(--card); padding: 10px 14px; border-radius: 9px; max-width: 420px; box-shadow: 0 6px 20px rgba(0,0,0,.2); font-size: 13px; animation: fade .15s; }
.toast.bad { background: var(--bad); color: #fff; }
.toast.good { background: var(--good-ink); color: #fff; }
.menu { position: absolute; z-index: 70; background: var(--card); border: 1px solid var(--border-strong); border-radius: 9px; box-shadow: 0 8px 28px rgba(0,0,0,.16); padding: 5px; min-width: 200px; }
.menu button { display: block; width: 100%; text-align: left; border: 0; background: none; padding: 7px 10px; border-radius: 6px; cursor: pointer; }
.menu button:hover { background: var(--sunken); }
.spinner { width: 16px; height: 16px; border: 2px solid var(--border-strong); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; display: inline-block; vertical-align: -3px; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-over { display: flex; align-items: center; gap: 10px; color: var(--ink-2); padding: 20px; justify-content: center; }
kbd { font-family: var(--mono); font-size: 11px; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; padding: 0 4px; }

/* =====================================================================
   THEME LAYER (v2): colour, depth and motion. Later rules override above.
   ===================================================================== */
body { background: var(--bg-art), var(--page); background-attachment: fixed; }
::selection { background: rgba(109,74,255,.22); }

/* header */
.topbar { background: color-mix(in srgb, var(--card) 78%, transparent); backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px); border-bottom: 1px solid var(--border); }
.brand { cursor: pointer; }
.brand span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; font-weight: 800; }
.brand svg { transition: transform .5s cubic-bezier(.2,.8,.2,1.4); }
.brand:hover svg { transform: rotate(-12deg) scale(1.08); }
.statusline { background: transparent; border-bottom: 0; padding-top: 10px; }
.pill { background: var(--card); box-shadow: 0 1px 2px rgba(0,0,0,.04); }

/* step tabs: each step has its own colour + icon */
.step { position: relative; border-radius: 10px; transition: background .15s, color .15s; }
.step .n { border: 0; width: 24px; height: 24px; border-radius: 8px; font-size: 13px; color: #fff;
  background: color-mix(in srgb, var(--sc, var(--accent)) 85%, #000 0%); box-shadow: 0 3px 8px -3px var(--sc, var(--accent)); }
.step .n .ico { filter: saturate(1.2); }
.step:not(.active):not(.done) .n { background: color-mix(in srgb, var(--sc) 16%, transparent); color: var(--sc); box-shadow: none; }
.step.done .n { background: var(--sc); color: #fff; }
.step.done .n::after { content: "✓"; position: absolute; transform: translate(9px, -9px); font-size: 9px; width: 13px; height: 13px;
  border-radius: 50%; background: var(--good); color: #fff; display: grid; place-items: center; border: 2px solid var(--card); }
.step.active { background: color-mix(in srgb, var(--sc) 12%, transparent); color: var(--ink); }
.step.active::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: -9px; height: 3px; border-radius: 3px; background: var(--sc); }
.step.home .n { background: var(--grad); color: #fff; box-shadow: var(--glow); }

/* buttons */
.btn { border-radius: 10px; transition: transform .12s, box-shadow .2s, background .15s, border-color .15s; }
.btn:active:not(:disabled) { transform: translateY(1px) scale(.99); }
.btn.primary { background: var(--grad); border: 0; box-shadow: var(--glow); background-size: 140% 140%; background-position: 0% 50%; }
.btn.primary:hover { filter: none; background-position: 100% 50%; box-shadow: 0 14px 34px -10px rgba(236,72,153,.55); transform: translateY(-1px); }
.btn.primary:disabled { box-shadow: none; }
.seg button.on { box-shadow: 0 2px 6px -2px rgba(76,52,200,.35); color: var(--accent-ink); }
.chip.on { background: var(--grad); border-color: transparent; }
.chip { transition: transform .12s, border-color .15s, color .15s; }
.chip:hover { transform: translateY(-1px); }

/* cards & motion */
.card { border-radius: var(--radius); }
.ds-card, .zoo-card, .sample, .tile, .qs-card, .hiw-step, .see-tile { transition: transform .18s cubic-bezier(.2,.8,.2,1), box-shadow .2s, border-color .2s; }
.ds-card:hover, .zoo-card:hover, .sample:hover, .qs-card:hover, .see-tile:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.ds-card.on { background: color-mix(in srgb, var(--accent) 8%, var(--card)); }
.page.show { animation: page-in .35s cubic-bezier(.2,.8,.2,1); }
@keyframes page-in { from { opacity: 0; transform: translateY(10px); } }
.page.show .reveal { animation: rise .55s cubic-bezier(.2,.8,.2,1) both; }
.page.show .reveal:nth-child(2) { animation-delay: .06s; } .page.show .reveal:nth-child(3) { animation-delay: .12s; }
.page.show .reveal:nth-child(4) { animation-delay: .18s; } .page.show .reveal:nth-child(5) { animation-delay: .24s; }
@keyframes rise { from { opacity: 0; transform: translateY(16px); } }
.page-head h1 { display: flex; align-items: center; gap: 10px; }
.page-head h1 .hico { width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; font-size: 19px;
  background: color-mix(in srgb, var(--sc) 16%, transparent); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--sc) 30%, transparent); }
.tile { position: relative; overflow: hidden; }
.tile::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad); opacity: .8; }
.progress { height: 10px; }
.progress > i { background: var(--grad); background-size: 200% 100%; position: relative; overflow: hidden; }
.progress > i::after { content: ""; position: absolute; inset: 0;
  background: repeating-linear-gradient(-45deg, rgba(255,255,255,.22) 0 8px, transparent 8px 16px); animation: stripes 1s linear infinite; }
@keyframes stripes { to { background-position: 22px 0; } }
.spinner { border-top-color: var(--accent-2); border-right-color: var(--accent); }
.note { border-left: 3px solid var(--accent); }
.note.warn { border-left-color: var(--warn); } .note.bad { border-left-color: var(--bad); } .note.good { border-left-color: var(--good); }
.kind-tag { display: inline-flex; align-items: center; gap: 5px; color: var(--kc, var(--muted)); }
.kind-tag::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--kc, var(--muted)); }
.rec-badge { font-size: 10.5px; font-weight: 700; padding: 1px 7px; border-radius: 99px; color: #fff; background: var(--grad); margin-left: 6px; }
.chart svg path.draw { stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 1.1s cubic-bezier(.4,0,.2,1) forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* coach (what to do on this page) */
.coach { position: relative; display: flex; gap: 14px; align-items: flex-start; padding: 14px 16px; margin-bottom: 16px; border-radius: var(--radius);
  background: linear-gradient(135deg, color-mix(in srgb, var(--sc, var(--accent)) 13%, var(--card)), var(--card));
  border: 1px solid color-mix(in srgb, var(--sc, var(--accent)) 30%, transparent); box-shadow: var(--shadow); animation: rise .5s both; }
.coach .c-ico { font-size: 22px; width: 40px; height: 40px; flex: none; display: grid; place-items: center; border-radius: 12px; background: var(--card);
  box-shadow: 0 4px 12px -4px color-mix(in srgb, var(--sc, var(--accent)) 60%, transparent); }
.coach h3 { margin-bottom: 6px; }
.coach ol { margin: 0; padding-left: 18px; color: var(--ink-2); display: grid; gap: 3px; }
.coach ol li::marker { color: var(--sc, var(--accent)); font-weight: 800; }
.coach .c-x { position: absolute; top: 8px; right: 8px; }

/* next-step guide pinned at the bottom */
.guide { position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 40; display: flex; align-items: center; gap: 12px;
  padding: 8px 8px 8px 16px; border-radius: 99px; background: color-mix(in srgb, var(--card) 85%, transparent); backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px); border: 1px solid var(--border-strong); box-shadow: 0 12px 40px -12px rgba(18,20,43,.35); max-width: calc(100vw - 24px);
  animation: guide-in .5s cubic-bezier(.2,.8,.2,1.2); }
@keyframes guide-in { from { opacity: 0; transform: translate(-50%, 20px); } }
.guide .dots { display: flex; gap: 5px; }
.guide .dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--axis); transition: background .3s, transform .3s; }
.guide .dots i.done { background: var(--good); } .guide .dots i.now { background: var(--accent); transform: scale(1.35); }
.guide .txt { font-size: 13px; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.guide .txt b { color: var(--ink); }
.guide .btn { border-radius: 99px; }
@media (max-width: 700px) { .guide .dots { display: none; } }
main { padding-bottom: 96px; }

/* layer-type colours in the flow */
.fcard { border-top: 3px solid var(--kc, var(--border)); }
.fcard .ftype { display: flex; align-items: center; gap: 5px; }
.fcard .ftype::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--kc, var(--muted)); flex: none; }
.fcard.fwd-now { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 45%, transparent), 0 10px 26px -8px color-mix(in srgb, var(--accent) 60%, transparent);
  animation: pulse-f 0.9s ease-in-out infinite; }
.fcard.bwd-now { box-shadow: 0 0 0 3px color-mix(in srgb, var(--pos) 45%, transparent), 0 10px 26px -8px color-mix(in srgb, var(--pos) 60%, transparent);
  animation: pulse-f 0.9s ease-in-out infinite; }
@keyframes pulse-f { 50% { transform: translateY(-3px); } }
.fcard.sel { box-shadow: 0 0 0 2px var(--accent) inset, var(--shadow-lift); }
.farrow { position: relative; width: 26px; }
.farrow::before { content: ""; position: absolute; left: 3px; right: 3px; top: 50%; height: 2px; border-radius: 2px; background: var(--axis); transition: background .3s; }
.farrow.lit-f::before { background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.farrow.lit-b::before { background: linear-gradient(90deg, var(--pos), #f59e0b); }
.farrow { color: transparent; }
.farrow .dot { position: absolute; top: calc(50% - 4px); width: 8px; height: 8px; border-radius: 50%; opacity: 0; }
.farrow.go-f .dot { background: var(--accent); box-shadow: 0 0 10px var(--accent); animation: travel-f .5s linear infinite; }
.farrow.go-b .dot { background: var(--pos); box-shadow: 0 0 10px var(--pos); animation: travel-b .5s linear infinite; }
@keyframes travel-f { from { left: 0; opacity: 1; } to { left: 18px; opacity: 1; } }
@keyframes travel-b { from { left: 18px; opacity: 1; } to { left: 0; opacity: 1; } }
.kind-legend { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 11.5px; color: var(--muted); margin-top: 4px; }
.kind-legend span { display: inline-flex; align-items: center; gap: 5px; }
.kind-legend i { width: 9px; height: 9px; border-radius: 3px; background: var(--kc); }
.lcard { border-left: 4px solid var(--kc, var(--border)); }
.netgraph line.flow-f { stroke-dasharray: 5 5; animation: dash-f .6s linear infinite; }
.netgraph line.flow-b { stroke-dasharray: 5 5; animation: dash-b .6s linear infinite; }
@keyframes dash-f { to { stroke-dashoffset: -10; } }
@keyframes dash-b { to { stroke-dashoffset: 10; } }

/* ---------- home ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 32px; align-items: center; padding: 18px 0 8px; }
.hero .eyebrow { display: inline-flex; gap: 8px; align-items: center; font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent-ink); background: var(--accent-wash); padding: 5px 12px; border-radius: 99px; }
.hero h1 { font-size: clamp(30px, 4.4vw, 52px); line-height: 1.06; letter-spacing: -.03em; font-weight: 800; margin: 14px 0 14px; }
.hero h1 .g { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 16.5px; color: var(--ink-2); max-width: 560px; line-height: 1.6; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.hero .fine { margin-top: 14px; font-size: 12.5px; color: var(--muted); display: flex; gap: 14px; flex-wrap: wrap; }
.hero-art { position: relative; aspect-ratio: 5/4; border-radius: 24px; overflow: hidden;
  background: radial-gradient(circle at 30% 20%, rgba(109,74,255,.35), transparent 55%), radial-gradient(circle at 80% 90%, rgba(236,72,153,.30), transparent 55%), #0d1030;
  box-shadow: 0 30px 60px -24px rgba(76,52,200,.55); border: 1px solid rgba(255,255,255,.08); }
.hero-art canvas { width: 100%; height: 100%; display: block; }
.hero-art .legend-f, .hero-art .legend-b { position: absolute; bottom: 14px; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 99px;
  color: #fff; transition: opacity .4s; }
.hero-art .legend-f { left: 14px; background: rgba(109,74,255,.85); } .hero-art .legend-b { right: 14px; background: rgba(227,73,72,.85); }
.hero-art .hl { position: absolute; top: 14px; left: 14px; right: 14px; display: flex; justify-content: space-between; font-size: 11px; color: rgba(255,255,255,.65); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.sec-title { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin: 34px 0 14px; flex-wrap: wrap; }
.sec-title h2 { font-size: 22px; letter-spacing: -.02em; }
.qs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.qs-card { position: relative; text-align: left; border: 1px solid var(--border); background: var(--card); border-radius: 18px; padding: 18px; cursor: pointer;
  display: flex; flex-direction: column; gap: 8px; overflow: hidden; box-shadow: var(--shadow); }
.qs-card::after { content: ""; position: absolute; inset: auto -40px -60px auto; width: 150px; height: 150px; border-radius: 50%; background: var(--qc); opacity: .12; transition: transform .4s; }
.qs-card:hover::after { transform: scale(1.4); }
.qs-card .qi { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; font-size: 24px; background: var(--qc);
  box-shadow: 0 10px 20px -8px var(--qc); }
.qs-card h3 { font-size: 16px; margin-top: 4px; }
.qs-card p { color: var(--ink-2); font-size: 13px; line-height: 1.5; }
.qs-card .meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; padding-top: 6px; }
.qs-card .meta span { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 99px; background: var(--sunken); color: var(--ink-2); }
.qs-card .go { font-weight: 700; color: var(--accent-ink); font-size: 13px; }
.hiw { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; position: relative; }
.hiw::before { content: ""; position: absolute; left: 6%; right: 6%; top: 29px; height: 3px; border-radius: 3px;
  background: linear-gradient(90deg, var(--s-data), var(--s-prep), var(--s-model), var(--s-viz), var(--s-train), var(--s-eval));
  background-size: 200% 100%; animation: flowbar 4s linear infinite; opacity: .55; }
@keyframes flowbar { to { background-position: -200% 0; } }
.hiw-step { position: relative; text-align: center; cursor: pointer; padding: 0 4px; background: none; border: 0; display: flex; flex-direction: column; align-items: center; justify-content: flex-start; color: inherit; }
.hiw-step .hi { width: 58px; height: 58px; margin: 0 auto 10px; border-radius: 18px; display: grid; place-items: center; font-size: 26px; background: var(--card);
  border: 2px solid var(--sc); box-shadow: 0 10px 22px -10px var(--sc); transition: transform .2s; }
.hiw-step:hover .hi { transform: translateY(-4px) rotate(-4deg); }
.hiw-step b { display: block; font-size: 13.5px; }
.hiw-step span { font-size: 12px; color: var(--ink-2); line-height: 1.45; display: block; margin-top: 3px; }
.see-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.see-tile { background: var(--card); border: 1px solid var(--border); border-radius: 18px; overflow: hidden; box-shadow: var(--shadow); }
.see-tile .art { height: 140px; display: grid; place-items: center; background: linear-gradient(160deg, var(--sunken), var(--card)); }
.see-tile .cap { padding: 12px 14px; }
.see-tile .cap b { display: block; font-size: 14px; }
.see-tile .cap span { font-size: 12.5px; color: var(--ink-2); }
.home-foot { margin-top: 34px; padding: 18px 20px; border-radius: 18px; display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 10%, var(--card)), color-mix(in srgb, var(--accent-2) 8%, var(--card))); border: 1px solid var(--border); }
@media (max-width: 1000px) { .hero { grid-template-columns: 1fr; } .hiw { grid-template-columns: repeat(3, 1fr); row-gap: 22px; } .hiw::before { display: none; } .see-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .hiw { grid-template-columns: repeat(2, 1fr); } .see-grid { grid-template-columns: 1fr; } }
/* tour set-up overlay */
.tour-steps { display: grid; gap: 10px; margin: 6px 0 4px; }
.tour-steps .ts { display: flex; gap: 10px; align-items: center; color: var(--muted); transition: color .2s; }
.tour-steps .ts i { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--axis); display: grid; place-items: center; font-style: normal; font-size: 12px; flex: none; }
.tour-steps .ts.now { color: var(--ink); } .tour-steps .ts.now i { border-color: var(--accent); border-top-color: transparent; animation: spin .7s linear infinite; }
.tour-steps .ts.done { color: var(--ink); } .tour-steps .ts.done i { background: var(--good); border-color: var(--good); color: #fff; animation: pop .3s; }
@keyframes pop { 50% { transform: scale(1.25); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }

.see-tile path.loss-a[pathLength] { stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 2.2s .4s cubic-bezier(.4,0,.2,1) forwards; }
.see-tile:hover path.loss-a[pathLength] { animation: draw 1.4s cubic-bezier(.4,0,.2,1) forwards; }
.page-head .coach { order: 5; flex-basis: 100%; margin: 4px 0 0; }

/* ---------- learning theatre (Train tab) ---------- */
.th-algos { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.th-algo { text-align: left; display: flex; flex-direction: column; gap: 3px; padding: 12px 14px; border-radius: 14px; border: 1.5px solid var(--border);
  background: var(--card); cursor: pointer; transition: transform .15s, border-color .15s, box-shadow .2s; }
.th-algo:hover { transform: translateY(-2px); box-shadow: var(--shadow-lift); }
.th-algo.on { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--card)); box-shadow: 0 0 0 1px var(--accent) inset; }
.th-algo .ai { font-size: 22px; }
.th-algo span:last-child { font-size: 12.5px; color: var(--ink-2); }
.th-layout { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 14px; align-items: start; }
@media (max-width: 1150px) { .th-layout { grid-template-columns: 1fr; } .th-algos { grid-template-columns: 1fr; } }
.th-top { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; align-items: flex-start; margin-bottom: 10px; }
.th-top > div:first-child { max-width: 560px; }
.th-rule { background: var(--sunken); padding: 6px 10px; border-radius: 8px; }
.th-controls { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; padding: 10px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.th-phase { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
.th-phase .ph { font-size: 11.5px; font-weight: 700; padding: 4px 10px; border-radius: 99px; background: var(--sunken); color: var(--muted); transition: all .25s; }
.th-phase .ph.on { color: #fff; background: var(--grad); box-shadow: var(--glow); }
.th-narr { min-height: 118px; padding: 14px 4px 6px; }
.th-narr-h { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.th-narr-h h3 { font-size: 16px; }
.th-narr p { margin: 4px 0; line-height: 1.55; }
.th-count { font-size: 11px; font-weight: 700; color: var(--accent-ink); background: var(--accent-wash); padding: 2px 8px; border-radius: 99px; }
.eqs { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.eq-chip { font-family: "Cambria Math", "STIX Two Math", Georgia, serif; font-size: 14px; padding: 4px 10px; border-radius: 8px; background: var(--sunken);
  border: 1px solid var(--border); border-left: 3px solid var(--kc, var(--accent)); animation: rise .35s both; }
.eqs.big .eq-chip { font-size: 17px; padding: 6px 12px; }
.eq-chip b { color: var(--accent-ink); }
.mini-plot { max-width: 420px; }
.th-stage { padding-top: 6px; }
.th-net { overflow-x: auto; }
.th-svg { display: block; min-width: 640px; }
.th-edge { transition: stroke .7s, stroke-width .7s, opacity .45s; }
.th-edge.spot { stroke-width: 4px !important; opacity: 1 !important; }
.th-circle { stroke: var(--axis); stroke-width: 1.5px; transition: fill .45s; }
.th-ring { fill: none; transition: stroke .45s, stroke-width .45s; }
.th-node { transition: opacity .45s; }
.th-node.spot .th-circle { stroke: var(--ink); stroke-width: 2.5px; }
.th-node.spot { animation: th-bump .9s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes th-bump { 50% { transform: scale(1.12); } }
.th-val { font: 700 9.5px var(--sans); pointer-events: none; transition: fill .3s; }
.th-head { font: 700 12.5px var(--sans); fill: var(--ink); }
.th-sub { font: 600 11px var(--sans); fill: var(--accent-ink); }
.th-lab { font: 500 11px var(--sans); fill: var(--ink-2); }
.th-elab { font: 700 9.5px var(--mono); fill: var(--ink); }
.th-elab-bg { fill: var(--card); stroke: var(--accent); stroke-width: 1; opacity: .92; }
.th-loss { transition: opacity .4s; }
.th-loss-c { fill: color-mix(in srgb, var(--pos) 14%, var(--card)); stroke: var(--pos); stroke-width: 2px; }
.th-loss-v { font: 800 15px var(--sans); fill: var(--pos); }
.th-legend { margin-top: 6px; }
.th-pulse { animation: th-ping 1.2s ease-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes th-ping { 0% { stroke-opacity: 1; } 100% { stroke-opacity: .2; } }
.th-chips { display: flex; flex-wrap: wrap; gap: 4px; }
.th-chip { width: 30px; height: 26px; border-radius: 7px; border: 1px solid var(--border-strong); background: var(--card); font-size: 11.5px; font-weight: 700; cursor: pointer; }
.th-chip.ok { border-bottom: 3px solid var(--good); } .th-chip.bad { border-bottom: 3px solid var(--bad); }
.th-chip.on { background: var(--grad); color: #fff; border-color: transparent; }
.th-chip:disabled { opacity: .45; cursor: default; }
.th-blocks { display: flex; align-items: stretch; overflow-x: auto; padding: 6px 2px 10px; }
.th-card { flex: none; width: 128px; border: 1px solid var(--border); border-top: 3px solid var(--kc, var(--k-group)); border-radius: 12px; background: var(--card); padding: 8px;
  display: flex; flex-direction: column; gap: 4px; transition: opacity .3s, box-shadow .3s; font-size: 12px; }
.th-card.off { opacity: .35; }
.th-card.now-f { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 45%, transparent); animation: pulse-f .9s ease-in-out infinite; }
.th-card.now-b { box-shadow: 0 0 0 3px color-mix(in srgb, var(--pos) 45%, transparent); animation: pulse-f .9s ease-in-out infinite; }
.th-card img { width: 100%; height: 72px; object-fit: contain; image-rendering: pixelated; background: var(--sunken); border-radius: 6px; }
.th-img-empty { height: 72px; border-radius: 6px; background: var(--sunken); }
.th-lossv { font-size: 22px; font-weight: 800; color: var(--pos); padding: 18px 0; text-align: center; }
.th-arrow { flex: none; width: 22px; position: relative; }
.th-arrow::before { content: ""; position: absolute; left: 2px; right: 2px; top: 50%; height: 2px; background: var(--axis); border-radius: 2px; }
.th-arrow.lit::before { background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.th-arrow.back::before { background: linear-gradient(90deg, var(--pos), #f59e0b); }

/* ---------- EDA ---------- */
:root { --s-eda: #0ea5e9; }
.eda-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.eda-feat { border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; background: var(--surface); display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.eda-feat > .row b, .eda-feat > b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.eda-score { font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 99px; white-space: nowrap; color: var(--accent-ink);
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 22%, transparent) var(--sv), var(--sunken) var(--sv)); }
.eda-mix { display: grid; grid-template-columns: 90px minmax(0, 1fr) 44px; gap: 6px; align-items: center; font-size: 12px; }
.eda-mix .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.eda-mix .bar { display: flex; height: 12px; border-radius: 3px; overflow: hidden; background: var(--sunken); gap: 1px; }
.eda-mix .bar i { display: block; height: 100%; }
.eda-mix .v { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink-2); }
.eda-words { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: baseline; }
.eda-word { font-weight: 700; color: var(--kc); }
.eda-means { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; }
.eda-mean { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 8px; border-radius: 12px; border: 1px solid var(--border); border-top: 3px solid var(--kc); background: var(--surface); }
.eda-mean img { width: 96px; height: 96px; image-rendering: pixelated; border-radius: 8px; }
.eda-ins { border-left: 4px solid var(--s-eda); }

/* ---- Data page: upload strip on top, full-width picker, compact side list once loaded ---- */
.drop-strip { display: flex; align-items: center; gap: 16px; text-align: left; padding: 16px 20px; margin-bottom: 18px;
  background: color-mix(in srgb, var(--s-data) 6%, var(--card)); border-color: color-mix(in srgb, var(--s-data) 45%, var(--border-strong)); }
.drop-strip:hover { border-color: var(--accent); }
.drop-strip .drop-ico { font-size: 26px; width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; flex: none;
  background: color-mix(in srgb, var(--s-data) 16%, var(--card)); }
.drop-strip .drop-txt { flex: 1; min-width: 0; }
.drop-strip .drop-txt .small { margin-top: 3px; color: var(--ink-2); }
.drop-strip .btn { flex: none; pointer-events: none; }
.drop-strip .drive-btn { pointer-events: auto; }
.drive-btn .drive-ico { color: #1fa463; font-size: 0.85em; }
.drop-strip.compact { padding: 10px 12px; gap: 10px; margin-bottom: 12px; }
.drop-strip.compact .drop-ico { width: 34px; height: 34px; font-size: 17px; border-radius: 9px; }
.ds-group-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.ds-group-head h4 { margin: 0; }
.ds-ctl { display: flex; align-items: center; gap: 6px; }
.ds-ctl select { padding: 3px 8px; font-size: 12.5px; }
.ds-card { position: relative; }
.ds-card .rec-badge { position: absolute; top: -9px; right: 10px; margin: 0; font-style: normal; font-size: 10.5px; font-weight: 700;
  letter-spacing: .02em; text-transform: none; white-space: nowrap; padding: 2px 9px; box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 35%, transparent); }
.ds-split { grid-template-columns: 320px minmax(0, 1fr); }
.ds-side { max-height: calc(100vh - 120px); overflow-y: auto; padding: 2px 6px 10px 2px; }
.ds-picker.compact .ds-group { margin-bottom: 12px; }
.ds-picker.compact .ds-grid { grid-template-columns: 1fr; gap: 6px; }
.ds-picker.compact .ds-card { padding: 8px 11px; }
.ds-picker.compact .ds-card b { display: flex; align-items: center; gap: 8px; font-size: 13.5px; }
.ds-picker.compact .ds-card .rec-badge { top: 50%; transform: translateY(-50%); }
.kdot { width: 8px; height: 8px; border-radius: 50%; background: var(--kc, var(--muted)); flex: none; }
@media (max-width: 1100px) { .ds-side { max-height: none; overflow: visible; } }
@media (max-width: 640px) { .drop-strip { flex-wrap: wrap; } .drop-strip .btn { width: 100%; } }
.card .stat-tiles { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.tile .v.word { font-size: 19px; line-height: 1.35; overflow-wrap: anywhere; text-transform: capitalize; }
@media (max-width: 1100px) { .ds-split { grid-template-columns: 1fr; } .ds-side { position: static; } }

/* ---- EDA v2: sub-tabs, distribution/violin/box charts, pies, canvas scatter, pair plot, projections ---- */
.eda-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 14px; padding: 5px; border-radius: 14px; background: var(--sunken); border: 1px solid var(--border); position: sticky; top: 64px; z-index: 5; }
.eda-tabs button { border: 0; background: none; padding: 8px 14px; border-radius: 10px; font-weight: 600; font-size: 13.5px; color: var(--ink-2); cursor: pointer; transition: background .15s, color .15s; }
.eda-tabs button:hover { color: var(--ink); background: color-mix(in srgb, var(--s-eda) 10%, transparent); }
.eda-tabs button.on { background: var(--card); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12), inset 0 -2px 0 var(--s-eda); }
.eda-how { font-size: 12.5px; color: var(--ink-2); background: color-mix(in srgb, var(--s-eda) 7%, var(--card)); border-left: 3px solid var(--s-eda); border-radius: 6px; padding: 7px 10px; margin: 8px 0 10px; }
.eda-how b { color: var(--ink); }
.eda-toolbar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.check { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; user-select: none; }
.seg.sm button { padding: 5px 10px; font-size: 12.5px; }
.eda-dist { display: block; overflow: visible; }
.eda-dist .gridline, .eda-sc .gridline, svg .gridline { stroke: var(--grid, var(--border)); stroke-width: 1; }
.eda-dist text, .eda-feat svg text { font-size: 10px; fill: var(--muted); }
.eda-row:hover > path, .eda-row:hover > rect[rx] { filter: brightness(1.08) saturate(1.2); }
.eda-pie-wrap { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.eda-pie-wrap.sm { gap: 10px; flex-wrap: nowrap; align-items: flex-start; }
.eda-pie .pie-seg { transform-origin: center; transform-box: view-box; animation: pie-in .6s cubic-bezier(.2,.8,.2,1) both; animation-delay: calc(var(--i) * 60ms); transition: transform .15s; }
.eda-pie .pie-seg:hover { transform: scale(1.04); }
@keyframes pie-in { from { opacity: 0; transform: scale(.6) rotate(-30deg); } }
.eda-pie .pie-n { font-size: 22px; font-weight: 700; fill: var(--ink); }
.eda-pie .pie-l { font-size: 11px; fill: var(--muted); }
.eda-pbar { grid-template-columns: 110px minmax(0, 1fr) 92px; }
.eda-stats td.num, .eda-stats th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.eda-stats td.hot { color: var(--bad); font-weight: 650; }
.eda-stats td.warm { color: var(--warn); font-weight: 650; }
.eda-sc { width: 100%; position: relative; }
.eda-sc canvas { display: block; cursor: crosshair; border-radius: 8px; }
.ramp-legend { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-2); }
.ramp-legend i { display: inline-block; width: 140px; height: 9px; border-radius: 5px; }
.ramp-legend span:first-child { font-weight: 650; color: var(--ink); }
.eda-ctl { gap: 8px; flex-wrap: wrap; }
.eda-ctl select { max-width: 170px; }
.eda-picks { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.eda-picks .chip { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; }
.eda-picks .chip input { display: none; }
.eda-pair canvas { display: block; cursor: pointer; }
.eda-knn { font-size: 13px; padding: 8px 12px; border-radius: 9px; margin-bottom: 10px; border: 1px solid var(--border); }
.eda-knn b { font-size: 16px; }
.eda-knn.good { background: color-mix(in srgb, var(--good) 10%, var(--card)); border-color: color-mix(in srgb, var(--good) 40%, var(--border)); }
.eda-knn.mid { background: color-mix(in srgb, var(--warn) 10%, var(--card)); border-color: color-mix(in srgb, var(--warn) 40%, var(--border)); }
.eda-knn.bad { background: color-mix(in srgb, var(--bad) 8%, var(--card)); border-color: color-mix(in srgb, var(--bad) 35%, var(--border)); }
.eda-load { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px 18px; }
.eda-lrow { display: grid; grid-template-columns: minmax(0, 1fr) 60px 40px; gap: 6px; align-items: center; font-size: 11.5px; margin-top: 3px; }
.eda-lrow .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.eda-lrow .lbar { position: relative; height: 9px; background: var(--sunken); border-radius: 3px; }
.eda-lrow .lbar::after { content: ""; position: absolute; left: 50%; top: -2px; bottom: -2px; width: 1px; background: var(--axis, var(--border-strong)); }
.eda-lrow .lbar i { position: absolute; top: 0; bottom: 0; border-radius: 3px; }
.eda-lrow .v { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink-2); }
.eda-mean img + img { margin-top: 4px; }
.eda-mix .nm .kdot { display: inline-block; margin-right: 5px; vertical-align: 1px; }
.eda-proj-ctl { border-left: 4px solid var(--s-eda); }
@media (max-width: 640px) { .eda-tabs { position: static; } .eda-pbar { grid-template-columns: 80px minmax(0, 1fr) 80px; } }

/* ---- server time: account button, paywall, packs ---- */
.acct-btn { font-variant-numeric: tabular-nums; border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.acct-btn.low { border-color: var(--warn); color: var(--warn); }
.acct-choice { align-items: stretch; }
.acct-choice ul { margin: 6px 0 12px; padding-left: 18px; line-height: 1.7; font-size: 13.5px; }
.acct-free { border-color: color-mix(in srgb, var(--good) 45%, var(--border)); }
.acct-packs { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.acct-pack { position: relative; border: 1px solid var(--border); border-radius: 12px; padding: 14px; display: flex; flex-direction: column; gap: 4px; background: var(--card); }
.acct-pack.best { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.acct-pack .rec-badge { position: absolute; top: -9px; right: 10px; margin: 0; }
.acct-pack .btn { margin-top: 8px; }
.ap-title { font-weight: 700; }
.ap-price { font-size: 26px; font-weight: 800; letter-spacing: -.02em; }
.ap-hours { font-weight: 600; color: var(--ink-2); }
.acct-signin { display: flex; flex-direction: column; gap: 10px; max-width: 420px; }
.acct-signin input { font-size: 15px; }
.acct-how { margin: 8px 0; padding-left: 18px; line-height: 1.7; font-size: 13px; color: var(--ink-2); }
.tier-note { font-size: 10.5px; font-weight: 700; padding: 1px 8px; border-radius: 99px; margin-left: 8px; text-transform: none; letter-spacing: 0; vertical-align: 1px; }
.tier-note.free { background: color-mix(in srgb, var(--good) 14%, var(--card)); color: var(--good-ink, var(--good)); }
.tier-note.paid { background: color-mix(in srgb, var(--accent) 12%, var(--card)); color: var(--accent-ink, var(--accent)); align-self: flex-start; }
.ds-card .paid-tag { position: absolute; bottom: 8px; right: 10px; font-style: normal; font-size: 12px; opacity: .75; }
#btn-compute.in-browser { border-color: color-mix(in srgb, var(--good) 55%, var(--border)); color: var(--good-ink, var(--good)); }
.where-on { border-color: var(--accent) !important; box-shadow: 0 0 0 1px var(--accent) inset; }
.boot-wait { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 80px 20px; color: var(--ink-2); font-weight: 550; }
/* the Apply button stays in view while the preprocessing options scroll */
.prep-panel { padding-bottom: 0; }
.prep-apply { position: sticky; bottom: 0; background: var(--card); padding: 12px 0 14px; margin-top: 8px; border-top: 1px solid var(--border); z-index: 2; box-shadow: 0 -8px 12px -8px rgba(0,0,0,.12); }
.where-opt { cursor: pointer; }
.where-opt h3 { margin: 0; font-size: 15px; }
.where-opt ul { font-size: 13px; line-height: 1.6; }
.prep-fab { position: fixed; right: 22px; bottom: 22px; z-index: 40; box-shadow: 0 8px 24px color-mix(in srgb, var(--accent) 45%, transparent); }
@media (max-width: 640px) { .prep-fab { right: 12px; bottom: 76px; } }

/* Site footer: pricing / privacy / contact links (payment and Google sign-in reviews look for them) */
.site-foot { display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: center; padding: 18px 16px 84px; font-size: 12.5px; color: var(--muted); border-top: 1px solid var(--border); margin-top: 24px; }
.site-foot a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
.site-foot a:hover { color: var(--ink); }