:root {
  --bg: #f4f6fb; --ink: #0f172a; --muted: #5b6577; --line: #e2e7f0; --card: #fff;
  --brand: #2563eb; --brand-ink: #fff; --accent: #ffd23f; --ok: #16a34a; --bad: #dc2626;
  --radius: 14px; --shadow: 0 1px 2px rgba(15,23,42,.06), 0 6px 24px rgba(15,23,42,.06);
  --hud-bg: rgba(10, 16, 30, .55); --hud-ink: #f8fafc;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink); background: var(--bg);
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { overscroll-behavior: none; }
button, input, select { font: inherit; color: inherit; }
kbd { display: inline-block; min-width: 1.6em; padding: .05em .4em; border: 1px solid #cbd5e1; border-bottom-width: 2px; border-radius: 6px; background: #fff; color: var(--ink); font: 600 .8em/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; text-align: center; }
[hidden] { display: none !important; }

.screen { display: none; min-height: 100%; }
.screen.active { display: block; }
#flight.active { display: block; position: fixed; inset: 0; overflow: hidden; background: #8fb7e0; touch-action: none; user-select: none; -webkit-user-select: none; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .4em; padding: .6em 1.1em; border-radius: 10px; border: 1px solid var(--line); background: #fff; color: var(--ink); font-weight: 600; cursor: pointer; text-decoration: none; transition: transform .08s, box-shadow .15s, background .15s; }
.btn:hover { box-shadow: var(--shadow); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn.primary:hover { background: #1d4ed8; }
.btn.ghost { background: transparent; }
.btn.big { padding: .8em 1.4em; font-size: 1.05rem; }
.btn:focus-visible, .seg button:focus-visible, .card:focus-visible { outline: 3px solid #93c5fd; outline-offset: 2px; }
.link { background: none; border: 0; color: inherit; text-decoration: underline; cursor: pointer; padding: 0; opacity: .85; }

/* ---------- home ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .9rem clamp(1rem, 4vw, 2.5rem); background: var(--ink); color: #fff; }
.brand { display: flex; align-items: center; gap: .6rem; color: #fff; text-decoration: none; font-size: 1.2rem; letter-spacing: .01em; }
.brand b { color: var(--accent); }
.chip { font-size: .78rem; padding: .3em .7em; border-radius: 999px; background: rgba(255,255,255,.12); color: #e2e8f0; white-space: nowrap; }
.chip.ok::before { content: "● "; color: #4ade80; }
.chip.warn::before { content: "● "; color: #fbbf24; }

.hero { background: linear-gradient(160deg, #0f172a 0%, #1e3a8a 55%, #2563eb 100%); color: #fff; padding: clamp(1.5rem, 5vw, 3.2rem) clamp(1rem, 4vw, 2.5rem) clamp(4rem, 8vw, 5.5rem); position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; right: -120px; top: -160px; width: 560px; height: 560px; border-radius: 50%; background: repeating-conic-gradient(from 10deg, rgba(255,255,255,.07) 0 4deg, transparent 4deg 60deg); pointer-events: none; }
.hero::before { content: ""; position: absolute; right: 150px; top: 110px; width: 26px; height: 26px; border-radius: 50%; background: rgba(255,210,63,.5); box-shadow: 0 0 0 10px rgba(255,210,63,.12); pointer-events: none; }
.hero-text { max-width: 720px; position: relative; z-index: 1; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; font-weight: 700; color: var(--accent); margin: 0 0 .4rem; }
.hero h1 { font-size: clamp(1.9rem, 5vw, 3rem); line-height: 1.08; margin: 0 0 .6rem; }
.lead { font-size: 1.05rem; color: #cbd5e1; margin: 0 0 1.2rem; max-width: 60ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .7rem; }
.hero .btn.ghost { color: #fff; border-color: rgba(255,255,255,.4); }
.hero .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--ink); }

.home-main { max-width: 1180px; margin: -3rem auto 0; padding: 0 clamp(.75rem, 3vw, 1.5rem) 2rem; display: grid; gap: 1.2rem; grid-template-columns: 1fr; position: relative; }
@media (min-width: 900px) { .home-main { grid-template-columns: 1fr 1fr; } .home-main > .panel:first-child { grid-column: 1 / -1; } }
.panel { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: clamp(1rem, 2.5vw, 1.5rem); border: 1px solid var(--line); }
.panel-head h2, .panel h2 { font-size: 1.1rem; margin: 0 0 1rem; display: flex; align-items: center; gap: .55rem; }
.num { display: inline-grid; place-items: center; width: 1.6rem; height: 1.6rem; border-radius: 50%; background: var(--brand); color: #fff; font-size: .85rem; }
.note { font-size: .82rem; color: var(--muted); background: #fff8db; border: 1px solid #fde68a; padding: .55rem .75rem; border-radius: 10px; margin: 1rem 0 0; }
.hint { font-size: .82rem; color: var(--muted); margin: .4rem 0 0; min-height: 1.2em; }
.muted { color: var(--muted); }

.cards { display: grid; gap: .9rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { position: relative; display: flex; flex-direction: column; text-align: left; border: 2px solid var(--line); border-radius: 12px; background: #fff; padding: 0; overflow: hidden; cursor: pointer; transition: border-color .15s, box-shadow .15s, transform .15s; }
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card[aria-checked="true"] { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
.card[aria-checked="true"]::after { content: "✓ Selected"; position: absolute; top: .55rem; right: .55rem; background: var(--brand); color: #fff; font-size: .72rem; font-weight: 700; padding: .2em .6em; border-radius: 999px; }
.card .img { background: linear-gradient(180deg, #e0ecff 0%, #f8fbff 100%); aspect-ratio: 16 / 10; display: grid; place-items: center; }
.card .img img { width: 92%; height: 92%; object-fit: contain; }
.card .body { padding: .75rem .9rem .9rem; display: flex; flex-direction: column; gap: .35rem; flex: 1; }
.card .title { display: flex; justify-content: space-between; align-items: baseline; gap: .5rem; }
.card h3 { margin: 0; font-size: 1rem; }
.card .price { font-weight: 800; color: var(--brand); white-space: nowrap; }
.card p { margin: 0; font-size: .85rem; color: var(--muted); line-height: 1.4; }
.card .tags { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: auto; padding-top: .4rem; }
.tag { font-size: .7rem; font-weight: 600; padding: .15em .55em; border-radius: 999px; background: #eef2ff; color: #3730a3; }
.tag.example { background: #fef3c7; color: #92400e; }
.meter { display: grid; grid-template-columns: 5.5em 1fr; align-items: center; gap: .4rem; font-size: .72rem; color: var(--muted); }
.meter i { display: block; height: 6px; border-radius: 3px; background: linear-gradient(90deg, var(--brand) var(--v), #e5e7eb var(--v)); }

.settings .setting { margin-bottom: 1.1rem; }
.settings label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .4rem; }
.settings label output { font-weight: 500; color: var(--muted); margin-left: .3em; }
.setting.two { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; background: #eef1f6; border-radius: 10px; padding: 3px; gap: 3px; }
.seg button { border: 0; background: transparent; padding: .5em .3em; border-radius: 8px; font-weight: 600; font-size: .86rem; cursor: pointer; color: var(--muted); }
.seg button[aria-pressed="true"] { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
input[type=range] { width: 100%; accent-color: var(--brand); }
.dir-row { display: flex; align-items: center; gap: .6rem; }
.dir-dial { flex: none; width: 30px; height: 30px; border-radius: 50%; border: 2px solid #cbd5e1; position: relative; }
.dir-dial i { position: absolute; left: 50%; top: 2px; width: 2px; height: 12px; background: var(--brand); transform-origin: 50% 11px; margin-left: -1px; border-radius: 1px; }
.dir-dial i::before { content: ""; position: absolute; left: -3px; bottom: -4px; border: 4px solid transparent; border-top-color: var(--brand); }
label.check { display: flex; align-items: center; gap: .5rem; font-weight: 500; margin: .3rem 0; cursor: pointer; }

.ctl-grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .ctl-grid { grid-template-columns: 1fr 1fr; } }
.controls-ref h3 { font-size: .85rem; margin: 0 0 .4rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
table.keys { border-collapse: collapse; font-size: .85rem; width: 100%; margin-bottom: .6rem; }
table.keys td { padding: .25rem .3rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.keys td:first-child { white-space: nowrap; width: 1%; padding-right: .8rem; }
.foot { text-align: center; font-size: .78rem; color: var(--muted); padding: 1rem 1rem 2rem; }

/* ---------- flight ---------- */
#scene { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hud { position: absolute; inset: 0; pointer-events: none; color: var(--hud-ink); font-variant-numeric: tabular-nums; text-shadow: 0 1px 2px rgba(0,0,0,.35); }
.hud-top { position: absolute; top: max(10px, env(safe-area-inset-top)); left: 10px; right: 10px; display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: start; }
.hud-box { background: var(--hud-bg); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); border-radius: 12px; padding: 8px 12px; }
.hud-box.left { justify-self: start; } .hud-box.right { justify-self: end; text-align: right; }
.hud-box.center { padding: 4px 6px 6px; text-align: center; }
.compass { display: block; width: min(260px, 38vw); height: 34px; }
.hdg { font: 700 .95rem/1 ui-monospace, Menlo, monospace; margin-top: 2px; color: var(--accent); }
.metric { display: flex; align-items: baseline; gap: 6px; white-space: nowrap; }
.hud-box.right .metric { justify-content: flex-end; }
.metric .lbl { font-size: .68rem; font-weight: 700; letter-spacing: .08em; opacity: .75; width: 2.6em; }
.metric .val { font: 700 1.35rem/1.15 ui-monospace, SFMono-Regular, Menlo, monospace; min-width: 3.2em; text-align: right; }
.metric .val i { font-style: normal; font-size: .7em; margin-right: 2px; opacity: .8; }
.metric .unit { font-size: .72rem; opacity: .75; width: 2.2em; }
.metric.small { font-size: .72rem; opacity: .8; }
.hud-bars { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); display: flex; gap: 10px; }
.bar { position: relative; width: 26px; height: 170px; background: var(--hud-bg); border-radius: 8px; overflow: hidden; border: 1px solid rgba(255,255,255,.2); }
.bar .fill { position: absolute; left: 0; right: 0; bottom: 0; height: 100%; transform-origin: bottom; transform: scaleY(0); }
.fill.col { background: linear-gradient(0deg, #22c55e, #facc15 70%, #ef4444); }
.fill.rpm { background: linear-gradient(0deg, #1d4ed8, #60a5fa); }
.bar-lbl { position: absolute; top: 4px; left: 0; right: 0; text-align: center; font-size: .58rem; font-weight: 800; letter-spacing: .04em; }
.bar-val { position: absolute; bottom: 4px; left: 0; right: 0; text-align: center; font-size: .6rem; font-weight: 700; }
.hud-wind { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); background: var(--hud-bg); border-radius: 12px; padding: 8px 10px; display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: .8rem; }
.hud-wind small { opacity: .75; font-size: .62rem; letter-spacing: .08em; }
.wind-arrow { display: inline-block; font-size: 1.4rem; line-height: 1; transition: transform .3s; transform-origin: 50% 50%; color: #93c5fd; }
.wind-arrow { rotate: -90deg; } /* glyph points right; base points up (nose direction) */
.hud-warn { position: absolute; top: 34%; left: 50%; transform: translateX(-50%); background: rgba(220, 38, 38, .85); color: #fff; padding: .35em .9em; border-radius: 8px; font-weight: 800; letter-spacing: .06em; font-size: .85rem; }
.hud-buttons { position: absolute; bottom: max(12px, env(safe-area-inset-bottom)); right: 12px; display: flex; gap: 8px; pointer-events: auto; }
.icon-btn { min-width: 44px; height: 44px; padding: 0 12px; border-radius: 12px; border: 1px solid rgba(255,255,255,.25); background: var(--hud-bg); color: #fff; font-weight: 700; cursor: pointer; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.icon-btn:hover { background: rgba(10,16,30,.75); }
#vrBtn { background: #7c3aed; border-color: #a78bfa; }
.model-tag { position: absolute; left: 12px; bottom: max(14px, env(safe-area-inset-bottom)); background: var(--hud-bg); padding: 6px 10px; border-radius: 10px; font-size: .8rem; }
.model-tag b { color: var(--accent); }
.keyhelp { position: absolute; left: 50%; bottom: max(14px, env(safe-area-inset-bottom)); transform: translateX(-50%); background: var(--hud-bg); padding: 6px 12px; border-radius: 10px; font-size: .8rem; white-space: nowrap; }
.keyhelp kbd, .tutorial kbd { background: rgba(255,255,255,.92); }

.tutorial { position: absolute; top: 96px; left: 50%; transform: translateX(-50%); width: min(460px, calc(100% - 24px)); background: rgba(255,255,255,.95); color: var(--ink); border-radius: 14px; padding: 12px 14px; box-shadow: 0 10px 30px rgba(0,0,0,.25); pointer-events: auto; }
.tut-head { display: flex; align-items: center; gap: .6rem; }
.tut-head b { flex: 1; font-size: 1.02rem; }
.tut-step { font-size: .7rem; font-weight: 800; letter-spacing: .06em; color: #fff; background: var(--brand); border-radius: 999px; padding: .2em .6em; white-space: nowrap; }
.tutorial p { margin: .5rem 0 .6rem; font-size: .9rem; line-height: 1.45; }
.tut-progress { height: 8px; border-radius: 4px; background: #e5e7eb; overflow: hidden; }
.tut-progress div { height: 100%; width: 0; background: linear-gradient(90deg, #22c55e, #16a34a); transition: width .2s; }
.tut-dots { display: flex; gap: 6px; list-style: none; padding: 0; margin: .55rem 0 0; }
.tut-dots li { flex: 1; height: 4px; border-radius: 2px; background: #e5e7eb; }
.tut-dots li.done { background: var(--ok); } .tut-dots li.cur { background: var(--brand); }
.tutorial.success { animation: pop .5s; }
@keyframes pop { 30% { transform: translateX(-50%) scale(1.04); } }

.sticks { position: absolute; inset: auto 0 0 0; height: 0; pointer-events: none; }
.stick { position: absolute; bottom: max(70px, calc(env(safe-area-inset-bottom) + 60px)); width: min(36vw, 150px); aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(255,255,255,.18) 0 30%, rgba(255,255,255,.08) 31%); border: 2px solid rgba(255,255,255,.45); pointer-events: auto; touch-action: none; }
.stick.left { left: max(16px, env(safe-area-inset-left)); border-radius: 26px; }
.stick.right { right: max(16px, env(safe-area-inset-right)); }
.stick::before, .stick::after { content: ""; position: absolute; background: rgba(255,255,255,.3); }
.stick::before { left: 50%; top: 10%; bottom: 10%; width: 2px; margin-left: -1px; }
.stick::after { top: 50%; left: 10%; right: 10%; height: 2px; margin-top: -1px; }
.stick .knob { position: absolute; left: 50%; top: 50%; width: 38%; aspect-ratio: 1; border-radius: 50%; transform: translate(-50%, -50%); background: radial-gradient(circle at 35% 30%, #fff, #cbd5e1); box-shadow: 0 3px 10px rgba(0,0,0,.35); z-index: 1; }
.stick.active { border-color: var(--accent); }
.stick-lbl { position: absolute; top: -1.5em; left: 0; right: 0; text-align: center; font-size: .62rem; font-weight: 800; letter-spacing: .08em; color: #fff; text-shadow: 0 1px 2px rgba(0,0,0,.6); }
body.touch .hud-bars { top: 42%; }
body.touch .model-tag, body.touch .keyhelp { display: none; }
body.touch .hud-buttons { top: max(118px, calc(env(safe-area-inset-top) + 108px)); bottom: auto; flex-direction: column; }
body.touch .hud-wind { top: auto; bottom: calc(min(36vw, 150px) + 110px); }

.overlay { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(15,23,42,.55); backdrop-filter: blur(3px); pointer-events: auto; }
.dialog { background: #fff; border-radius: 16px; padding: 1.4rem; width: min(360px, calc(100% - 32px)); display: grid; gap: .6rem; box-shadow: 0 20px 50px rgba(0,0,0,.3); }
.dialog h2 { margin: 0 0 .3rem; text-align: center; }
.dialog .hint { text-align: center; }
.crash-flash { position: absolute; inset: 0; display: grid; place-items: center; background: radial-gradient(circle, rgba(220,38,38,.25), rgba(127,29,29,.55)); pointer-events: none; animation: flash .6s; }
.crash-flash div { background: rgba(127,29,29,.9); color: #fff; padding: 1rem 1.6rem; border-radius: 14px; text-align: center; display: grid; gap: .2rem; }
.crash-flash b { font-size: 2rem; letter-spacing: .2em; }
@keyframes flash { 0% { background: rgba(255,255,255,.9); } }
.toast { position: absolute; left: 50%; top: 40%; transform: translate(-50%, -50%); background: rgba(22,163,74,.92); color: #fff; padding: .6em 1.2em; border-radius: 12px; font-weight: 700; font-size: 1.1rem; pointer-events: none; animation: toast 1.8s forwards; }
@keyframes toast { 0% { opacity: 0; transform: translate(-50%, -30%); } 15%, 75% { opacity: 1; transform: translate(-50%, -50%); } 100% { opacity: 0; } }

/* ---------- summary ---------- */
.summary-main { max-width: 980px; margin: 1.5rem auto; padding: 0 clamp(.75rem, 3vw, 1.5rem) 2rem; display: grid; gap: 1.2rem; }
.sum-head { display: grid; grid-template-columns: minmax(0, 280px) 1fr; gap: 1.2rem; align-items: center; }
.sum-head img { width: 100%; height: auto; background: linear-gradient(180deg, #e0ecff, #f8fbff); border-radius: 12px; }
.sum-head h1 { margin: 0 0 .3rem; font-size: clamp(1.5rem, 4vw, 2.2rem); }
.summary-card .lead { color: var(--muted); }
.summary-card .eyebrow { color: var(--brand); }
.summary-card.crashed .eyebrow { color: var(--bad); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: .8rem; margin: 1.3rem 0; }
.stat { background: #f6f8fc; border: 1px solid var(--line); border-radius: 12px; padding: .8rem 1rem; }
.stat .k { font-size: .75rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 700; }
.stat .v { font-size: 1.6rem; font-weight: 800; font-variant-numeric: tabular-nums; margin-top: .15rem; }
.stat .v small { font-size: .9rem; font-weight: 600; color: var(--muted); margin-left: .2em; }
.sum-actions { display: flex; flex-wrap: wrap; gap: .7rem; }
.recent-list { list-style: none; margin: 0; padding: 0; }
.recent-list li { display: grid; grid-template-columns: 1fr auto auto auto; gap: 1rem; padding: .55rem 0; border-bottom: 1px solid var(--line); font-size: .88rem; align-items: center; }
.recent-list li.muted { display: block; }
.recent-list .crash { color: var(--bad); font-weight: 700; }
.recent-list .num2 { font-variant-numeric: tabular-nums; color: var(--muted); }

@media (max-width: 640px) {
  .sum-head { grid-template-columns: 1fr; }
  .sum-head img { max-width: 320px; }
  .sum-actions .btn { flex: 1 1 100%; }
  .setting.two { grid-template-columns: 1fr; }
  .hero::before { display: none; }
  .metric .val { font-size: 1rem; min-width: 2.6em; }
  .metric .lbl { width: auto; font-size: .6rem; }
  .metric .unit { width: auto; font-size: .62rem; }
  .metric.small { display: none; }
  .metric { gap: 4px; }
  .hud-box { padding: 6px 8px; }
  .hud-top { gap: 6px; left: 6px; right: 6px; }
  .compass { width: 30vw; }
  .bar { height: 120px; width: 22px; }
  .recent-list li { grid-template-columns: 1fr auto auto; } .recent-list li .when { display: none; }
  .tutorial { top: auto; bottom: calc(min(36vw, 150px) + 96px); }
}
@media (max-height: 500px) and (orientation: landscape) {
  .stick { width: min(30vh, 130px); bottom: 16px; }
  .bar { height: 100px; }
  .tutorial { top: 70px; width: min(380px, 50vw); padding: 8px 10px; }
  .tutorial p { font-size: .8rem; margin: .3rem 0; }
  body.touch .hud-buttons { top: 70px; }
  body.touch .hud-wind { bottom: auto; top: 50%; }
  .hud-bars { display: none; }
}