/* GolfCake 3D — shadcn/ui-inspired dark theme (zinc neutrals, hairline borders, rounded-xl cards) */
:root {
  --background: #09090b;
  --card: #0c0c0f;
  --muted-bg: #18181b;
  --border: #27272a;
  --input: #27272a;
  --ring: #52525b;
  --foreground: #fafafa;
  --muted: #a1a1aa;
  --faint: #71717a;
  --primary: #fafafa;
  --primary-ink: #18181b;
  --chart-1: #2dd4bf;   /* chest  */
  --chart-2: #f59e0b;   /* hips   */
  --good: #22c55e;
  --ok: #eab308;
  --bad: #ef4444;
  --radius: 12px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--background); color: var(--foreground); }
body { font: 14px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button { font: inherit; color: inherit; }
::selection { background: #3f3f46; }

/* ---------- shell ---------- */
.top { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between;
  height: 56px; padding: 0 24px; border-bottom: 1px solid var(--border);
  background: rgba(9,9,11,.8); backdrop-filter: saturate(180%) blur(12px); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; text-decoration: none; font-size: 15px; letter-spacing: -.01em; }
.mark { width: 22px; height: 22px; border-radius: 6px; background: var(--primary); position: relative; }
.mark::after { content: ""; position: absolute; inset: 6px; border-radius: 50%; background: var(--background); }
.top nav { display: flex; gap: 4px; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 14px; padding: 6px 10px; border-radius: 8px; }
.top nav a:hover { color: var(--foreground); background: var(--muted-bg); }
main { max-width: 1180px; margin: 0 auto; padding: 24px 24px 72px; }

/* ---------- primitives ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 1px 2px rgba(0,0,0,.3); }
.card-h { padding: 20px 20px 0; }
.card-h h3 { margin: 0; font-size: 15px; font-weight: 600; letter-spacing: -.01em; }
.card-h p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.card-c { padding: 16px 20px 20px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 36px; padding: 0 14px; border-radius: 8px;
  border: 1px solid var(--input); background: transparent; cursor: pointer; text-decoration: none; font-size: 14px; font-weight: 500; }
.btn:hover { background: var(--muted-bg); }
.btn.primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.btn.primary:hover { background: #e4e4e7; }
.badge { display: inline-flex; align-items: center; gap: 6px; height: 22px; padding: 0 9px; border-radius: 6px; border: 1px solid var(--border);
  font-size: 12px; font-weight: 500; color: var(--muted); white-space: nowrap; }
.badge b { color: var(--foreground); font-weight: 600; }
.seg { display: inline-flex; background: var(--muted-bg); border-radius: 9px; padding: 3px; gap: 2px; }
.seg button { border: 0; background: transparent; height: 28px; padding: 0 11px; border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: 500; color: var(--muted); }
.seg button:hover { color: var(--foreground); }
.seg button.on { background: var(--background); color: var(--foreground); box-shadow: 0 1px 2px rgba(0,0,0,.4), 0 0 0 1px var(--border); }
.label-sm { font-size: 12px; color: var(--muted); font-weight: 500; }
.dotc { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex: none; }

/* ---------- home ---------- */
.hero { text-align: center; padding: 56px 0 8px; }
.hero .badge { margin-bottom: 18px; }
.hero h1 { font-size: clamp(32px, 5.4vw, 56px); line-height: 1.04; letter-spacing: -.04em; margin: 0 0 14px; font-weight: 700; }
.hero h1 span { color: var(--muted); }
.hero p { color: var(--muted); margin: 0 auto; max-width: 540px; font-size: 16px; }
.upload { max-width: 620px; margin: 36px auto 0; }
.drop { display: block; border: 1px dashed #3f3f46; border-radius: 10px; padding: 40px 24px; text-align: center; cursor: pointer;
  transition: border-color .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--muted); background: rgba(24,24,27,.6); }
.drop .icon { width: 44px; height: 44px; margin: 0 auto 14px; border-radius: 10px; display: grid; place-items: center; border: 1px solid var(--border); background: var(--muted-bg); }
.drop b { display: block; font-size: 15px; margin-bottom: 4px; font-weight: 600; }
.drop span { color: var(--muted); font-size: 13px; }
.upload .row { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 48px; }
.feature .card-c { padding-top: 0; }
.feature .ico { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--border); background: var(--muted-bg); display: grid; place-items: center; margin-bottom: 12px; }
.section-title { display: flex; align-items: baseline; justify-content: space-between; margin: 48px 0 14px; }
.section-title h2 { margin: 0; font-size: 18px; letter-spacing: -.02em; }
.section-title a { color: var(--muted); font-size: 13px; text-decoration: none; }
.section-title a:hover { color: var(--foreground); }

/* ---------- processing ---------- */
.proc { max-width: 440px; margin: 72px auto; }
.proc .card-c { padding-top: 18px; }
.steps { list-style: none; margin: 0 0 18px; padding: 0; display: grid; gap: 10px; }
.steps li { display: flex; gap: 10px; align-items: center; color: var(--faint); font-size: 14px; }
.steps li i { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid var(--border); flex: none; display: grid; place-items: center; }
.steps li.done { color: var(--muted); }
.steps li.done i { background: var(--primary); border-color: var(--primary); }
.steps li.done i::after { content: ""; width: 7px; height: 4px; border: solid var(--primary-ink); border-width: 0 0 2px 2px; transform: rotate(-45deg) translate(1px, -1px); }
.steps li.now { color: var(--foreground); }
.steps li.now i { border-color: var(--foreground); border-top-color: transparent; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.bar { height: 4px; background: var(--muted-bg); border-radius: 99px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--primary); border-radius: 99px; transition: width .6s ease; }
.err { color: var(--bad); }

/* ---------- results ---------- */
.res-grid { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 16px; align-items: start; }
.side { display: grid; gap: 16px; position: sticky; top: 72px; }
.score-card .card-c { display: flex; gap: 18px; align-items: center; }
.ring { --v: 0; --c: var(--primary); width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center; flex: none;
  background: radial-gradient(closest-side, var(--card) 84%, transparent 85% 100%), conic-gradient(var(--c) calc(var(--v) * 1%), var(--muted-bg) 0); }
.ring b { font-size: 30px; letter-spacing: -.03em; font-weight: 700; }
.score-card h2 { margin: 0; font-size: 17px; letter-spacing: -.02em; }
.score-card p { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.catrow { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; align-items: center; padding: 9px 0; border-top: 1px solid var(--border); font-size: 13px; }
.catrow:first-child { border-top: 0; padding-top: 0; }
.catrow .v { font-variant-numeric: tabular-nums; font-weight: 600; }
.catrow .meter { grid-column: 1 / -1; height: 4px; background: var(--muted-bg); border-radius: 99px; overflow: hidden; }
.catrow .meter i { display: block; height: 100%; border-radius: 99px; }

.stage-card { overflow: hidden; }
.stage-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.stage { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); }
.pane { position: relative; aspect-ratio: 3 / 4; background: #050506; }
.pane + .pane { border-left: 1px solid var(--border); }
.pane .tag { position: absolute; top: 10px; left: 10px; z-index: 2; }
.pane canvas { display: block; width: 100%; height: 100%; }
.pane.video { display: grid; place-items: center; }
.pane.video canvas { width: auto; height: auto; max-width: 100%; max-height: 100%; }
.toggle2d { position: absolute; bottom: 10px; left: 10px; z-index: 2; }
.transport { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--border); }
.play { width: 36px; height: 36px; border-radius: 8px; border: 0; background: var(--primary); color: var(--primary-ink); cursor: pointer; display: grid; place-items: center; flex: none; }
.play:hover { background: #e4e4e7; }
input[type=range] { flex: 1; accent-color: var(--foreground); min-width: 80px; }
.time { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 13px; min-width: 86px; text-align: right; }
.phases { display: grid; grid-template-columns: repeat(10, 1fr); gap: 8px; padding: 0 16px 16px; }
.ph { border: 1px solid var(--border); background: var(--muted-bg); border-radius: 8px; padding: 0; cursor: pointer; overflow: hidden; text-align: left; transition: border-color .15s; }
.ph:hover { border-color: var(--ring); }
.ph img { display: block; width: 100%; aspect-ratio: 3/4; object-fit: cover; opacity: .8; }
.ph span { display: block; font-size: 11px; padding: 5px 7px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ph span b { color: var(--foreground); font-weight: 600; margin-right: 3px; }
.ph.on { border-color: var(--foreground); }
.ph.on img { opacity: 1; }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.fault { display: grid; grid-template-columns: auto 1fr auto; gap: 4px 10px; align-items: start; padding: 12px 0; border-top: 1px solid var(--border); }
.fault:first-child { border-top: 0; padding-top: 0; }
.fault .dotc { margin-top: 6px; background: var(--ok); }
.fault.high .dotc { background: var(--bad); }
.fault.low .dotc { background: var(--faint); }
.fault b { font-weight: 600; }
.fault p { grid-column: 2 / 4; margin: 0; color: var(--muted); font-size: 13px; }
.fault .btn { height: 26px; padding: 0 8px; font-size: 12px; }
.good { color: var(--muted); margin: 0; }

.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 0 32px; }
.group { font-size: 12px; color: var(--faint); font-weight: 500; margin: 16px 0 2px; grid-column: 1 / -1; }
.group:first-child { margin-top: 0; }
.metric { padding: 10px 0; border-bottom: 1px solid var(--border); }
.metric .mtop { display: flex; justify-content: space-between; gap: 8px; }
.metric .v { font-variant-numeric: tabular-nums; font-weight: 600; }
.metric .note { font-size: 12px; color: var(--faint); margin-top: 4px; }
.scale { position: relative; height: 4px; border-radius: 99px; background: var(--muted-bg); margin-top: 9px; }
.scale .zone { position: absolute; top: 0; bottom: 0; background: #3f3f46; border-radius: 99px; }
.scale .dot { position: absolute; top: 50%; width: 10px; height: 10px; margin: -5px 0 0 -5px; border-radius: 50%; box-shadow: 0 0 0 2px var(--card); }
canvas.chart { width: 100%; height: 180px; display: block; }
.legend { display: flex; gap: 14px; font-size: 12px; color: var(--muted); margin-top: 10px; align-items: center; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }

.history { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
.hcard { overflow: hidden; text-decoration: none; transition: border-color .15s; }
.hcard:hover { border-color: var(--ring); }
.hcard img { width: 100%; aspect-ratio: 4/5; object-fit: cover; display: block; background: #050506; border-bottom: 1px solid var(--border); }
.hcard .meta { padding: 10px 12px; display: flex; justify-content: space-between; align-items: center; }
.hcard .meta b { font-size: 16px; }
.hcard .meta span { color: var(--muted); font-size: 12px; }
.empty { color: var(--muted); text-align: center; margin: 48px 0; }

@media (max-width: 980px) {
  .res-grid { grid-template-columns: 1fr; }
  .side { position: static; grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  main { padding: 16px 16px 56px; }
  .top { padding: 0 16px; }
  .features, .cols, .metrics, .side { grid-template-columns: 1fr; }
  .phases { grid-template-columns: repeat(5, 1fr); }
  .stage-top .seg button { padding: 0 8px; font-size: 12px; }
}
@media (max-width: 480px) {
  .stage { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: 28px; }
}

/* ---------- coaching additions ---------- */
.stage-ctl { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.legend3d { position: absolute; top: 10px; right: 10px; z-index: 2; }
.row-h { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.fault.first { background: var(--muted-bg); border: 1px solid var(--border); border-radius: 10px; padding: 12px; margin-bottom: 4px; }
.fault .prio { grid-column: 1 / -1; justify-self: start; margin-bottom: 6px; color: var(--foreground); border-color: var(--ring); }
.drill { grid-column: 2 / 4; margin-top: 6px; font-size: 13px; }
.drill summary { cursor: pointer; color: var(--foreground); font-weight: 500; list-style: none; }
.drill summary::-webkit-details-marker { display: none; }
.drill summary::before { content: "+"; display: inline-block; width: 14px; color: var(--muted); }
.drill[open] summary::before { content: "–"; }
.drill summary span { color: var(--faint); font-weight: 400; margin-left: 6px; }
.drill ol { margin: 8px 0 0; padding-left: 20px; color: var(--muted); }
.drill li { margin: 3px 0; }
.seqline { margin: 10px 0 0; font-size: 13px; color: var(--muted); }
.seqline .note { color: var(--faint); }
.trend-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
canvas.trend { width: 100%; height: 120px; display: block; }
@media (max-width: 860px) { .trend-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .trend-grid { grid-template-columns: 1fr; } .stage-ctl { justify-content: flex-start; } }