/* Ball Tracer: golf-friendly, phone-first */
:root{
  /* ===== BRAND PALETTE: swap these to rebrand (see js/brand.js) ===== */
  --brand-900:#0d3b22;--brand-800:#14532d;--brand-700:#1a6b3a;--brand-600:#1f7a3d;--brand-100:#e6f2e9;--brand-50:#f3f8f4;
  --accent:#f5c518;            /* highlight: active step, Recommended badge, focus ring */
  --page:#f7f4ea;              /* page background */
  --ink:#13261a;--ink-2:#3d5446;--muted:#4d6455;--muted-2:#6b8173;--line:#d5e2d8;--ok-line:#b9dcc4;--white:#fff;
  --live:#c0261b;--live-soft:#ffe4e1;   /* "Trace live" icon */
  --danger:#b42318;--danger-soft:#fdecea;--danger-ink:#8a1c12;
  --stage-bg:#0b1410;--game-bg:#0a0d12;
  --tracer:#ff3b3b;            /* default tracer color (also js/tracer.js opts.color) */
  /* ===== layout / type ===== */
  --radius:16px;--shadow:0 6px 24px color-mix(in srgb,var(--brand-900) 10%,transparent);
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  /* legacy aliases used by the game */
  --bg:var(--game-bg);--panel:var(--white);--txt:var(--ink);--acc:var(--brand-600);--acc2:#3ddc84
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--page);color:var(--ink);font:16px/1.5 var(--font);min-height:100vh;display:flex;flex-direction:column}
main{width:100%;max-width:980px;margin:0 auto;padding:12px 14px 8px;flex:1}
h1{font-size:28px;line-height:1.15;margin:8px 0 6px;letter-spacing:-.02em}
h2{font-size:20px;margin:0 0 6px;letter-spacing:-.01em}
h3{font-size:15px;margin:0 0 8px;text-transform:uppercase;letter-spacing:.06em;color:var(--brand-700)}
p{margin:0 0 10px}
.lead{font-size:17px;color:var(--ink-2);margin-bottom:16px}
.muted{color:var(--muted)}.small{font-size:14px}
b{font-weight:700}
button,input,select{font:inherit;color:inherit}
button,a,label,select,input,.sheet,.modal{touch-action:manipulation}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* header */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:calc(env(safe-area-inset-top) + 10px) 14px 10px;background:var(--brand-800);color:var(--white);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:8px;color:var(--white);text-decoration:none;min-height:44px}
.logo{width:36px;height:36px;border-radius:9px;box-shadow:0 0 0 1.5px color-mix(in srgb,var(--white) 35%,transparent)}
.wordmark{font-size:21px;letter-spacing:-.02em;font-weight:500}
.wordmark b{font-weight:800;color:var(--white);margin-left:2px}
.icon-btn{width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.12);color:var(--white);display:grid;place-items:center;cursor:pointer}
.icon-btn svg{width:24px;height:24px}

/* stepper */
.stepper{list-style:none;display:flex;gap:6px;padding:0;margin:4px 0 14px}
.stepper li{flex:1;display:flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--muted-2);background:var(--white);border:1px solid var(--line);border-radius:999px;padding:6px 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:all .25s}
.stepper span{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--brand-100);color:var(--brand-800);font-size:13px}
.stepper li.on{background:var(--brand-800);border-color:var(--brand-800);color:var(--white)}
.stepper li.on span{background:var(--accent);color:var(--brand-900)}
.stepper li.done span{background:var(--brand-600);color:var(--white)}
body[data-view=game] .stepper{display:none}

/* screens */
.panel{display:none}.panel.active{display:block}
.screen{display:none;animation:fade .25s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
body[data-view=start] #screenStart{display:block}
body:not([data-view=start]) #screenTrace{display:block}

/* step 1 choices */
.choices{display:grid;gap:12px}
.choice{position:relative;display:grid;grid-template-columns:52px 1fr;grid-template-rows:auto auto;column-gap:14px;align-items:center;text-align:left;width:100%;background:var(--white);border:2px solid var(--line);border-radius:var(--radius);padding:18px 16px;cursor:pointer;box-shadow:var(--shadow);min-height:88px;transition:transform .12s,border-color .2s}
.choice:hover{border-color:var(--brand-600)}.choice:active{transform:scale(.985)}
.choice svg{grid-row:1/3;width:52px;height:52px;padding:12px;border-radius:14px;background:var(--brand-100);color:var(--brand-800)}
.choice .c-title{font-size:19px;font-weight:800;color:var(--ink)}
.choice .c-sub{font-size:15px;color:var(--ink-2)}
.choice em{font-style:normal;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.05em;background:var(--accent);color:var(--brand-900);padding:3px 8px;border-radius:999px;margin-left:6px;vertical-align:2px}
.choice.recommended{border-color:var(--brand-600)}
.choice input[type=file]{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
#liveBtn svg{background:var(--live-soft);color:var(--live)}
.links{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:center;margin:16px 0 4px}
.link-btn{background:none;border:0;color:var(--brand-700);font-weight:700;text-decoration:underline;text-underline-offset:3px;cursor:pointer;min-height:44px;padding:0 4px;font-size:16px}
@media (min-width:760px){.choices{grid-template-columns:repeat(3,1fr)}.choice{grid-template-columns:1fr;grid-template-rows:auto;row-gap:6px;padding:22px 18px}.choice svg{grid-row:auto}}

/* stage */
.stage-wrap{position:relative;background:var(--stage-bg);border-radius:var(--radius);overflow:hidden;display:flex;justify-content:center;align-items:center;min-height:180px;box-shadow:var(--shadow)}
.stage-box{position:relative;max-width:100%}
.stage-box video,.stage-box canvas#stage{position:absolute;inset:0;width:100%;height:100%;display:block}
.stage-box video{object-fit:fill;background:#000}
#stage{cursor:crosshair;touch-action:none}
.drop-hint{position:absolute;inset:0;display:none;align-items:center;justify-content:center;font-size:22px;color:var(--white);background:color-mix(in srgb,var(--brand-600) 50%,transparent);border:3px dashed var(--accent)}
.stage-wrap.drag .drop-hint{display:flex}
.src-name{font-size:13px;color:var(--muted);margin:6px 2px 0;min-height:18px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.stage-msg{position:absolute;left:0;right:0;margin:0 auto;width:fit-content;top:12px;background:color-mix(in srgb,var(--brand-900) 92%,transparent);color:var(--white);padding:10px 16px;border-radius:14px;text-align:center;max-width:92%;z-index:3;pointer-events:none;box-shadow:0 4px 18px rgba(0,0,0,.3);animation:pulseMsg 2s ease-in-out infinite}
.stage-msg b{display:block;font-size:19px}
.stage-msg span{display:block;font-size:14px;opacity:.9}
@keyframes pulseMsg{50%{box-shadow:0 0 0 6px color-mix(in srgb,var(--accent) 35%,transparent)}}
.stage-msg[hidden],.ana[hidden],.loupe[hidden],.status[hidden]{display:none}
.loupe{position:absolute;width:120px;height:120px;border-radius:50%;overflow:hidden;border:3px solid var(--white);box-shadow:0 6px 20px rgba(0,0,0,.45);z-index:5;pointer-events:none}
.loupe canvas{width:100%;height:100%;display:block}
.ana{position:absolute;inset:auto 10px 10px 10px;z-index:4;background:rgba(255,255,255,.96);color:var(--ink);border-radius:14px;padding:12px 14px;display:grid;grid-template-columns:1fr auto;gap:6px 12px;align-items:center;box-shadow:0 6px 20px rgba(0,0,0,.25)}
.ana-title{font-size:18px;font-weight:800;grid-column:1}
.ana .btn{grid-column:2;grid-row:1/4}
.ana .bar{height:10px;background:var(--brand-100);border-radius:6px;overflow:hidden;grid-column:1}
.ana .bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand-600),var(--accent));transition:width .2s}
#anaMsg{font-size:15px;color:var(--ink-2);grid-column:1}

/* transport */
.transport{display:flex;align-items:center;gap:8px;margin:10px 0}
.transport input[type=range]{flex:1;min-width:80px;height:44px;accent-color:var(--brand-600)}
.time{font-variant-numeric:tabular-nums;font-size:14px;color:var(--muted);min-width:86px;text-align:right}
body[data-view=start] .transport,body[data-view=live] .transport,body[data-view=analyzing] .transport{display:none}
body[data-view=live] .src-name{display:none}

/* cards per view */
.card{display:none;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:10px 0;box-shadow:var(--shadow);animation:fade .25s ease}
body[data-view=tap] #panelTap,body[data-view=hand] #panelHand,body[data-view=result] #panelResult,body[data-view=live] #panelLive{display:block}
.row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.row.end{justify-content:flex-end}
.steps-small{margin:0 0 6px;padding-left:22px}

/* buttons */
.btn{min-height:44px;padding:10px 16px;border-radius:12px;border:2px solid var(--line);background:var(--white);color:var(--ink);font-weight:700;font-size:16px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;transition:background .15s,transform .1s}
.btn:hover{border-color:var(--brand-600)}.btn:active{transform:scale(.98)}
.btn.primary{background:var(--brand-600);border-color:var(--brand-600);color:var(--white)}
.btn.primary:hover{background:var(--brand-700)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--brand-700);text-decoration:underline;text-underline-offset:3px}
.btn.icon{width:48px;padding:0;font-size:18px}
.btn.big{min-height:56px;font-size:18px;flex:1 1 140px;border-radius:14px}
.btn.rec{background:var(--danger);border-color:var(--danger);color:var(--white)}
.btn:disabled{opacity:.45;pointer-events:none}
.big-actions{display:flex;gap:10px;flex-wrap:wrap}

/* result */
.status{background:var(--brand-50);border:1px solid var(--ok-line);border-radius:12px;padding:10px 14px;margin-bottom:12px;font-size:16px}
.style-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}
.swatches{display:flex;gap:10px}
.sw{width:44px;height:44px;border-radius:50%;background:var(--c);border:3px solid var(--white);box-shadow:0 0 0 2px var(--line);cursor:pointer}
.sw.active{box-shadow:0 0 0 3px var(--brand-800)}
.seg{display:inline-flex;border:2px solid var(--line);border-radius:12px;overflow:hidden;background:var(--white)}
.seg button{min-height:44px;min-width:64px;padding:0 14px;border:0;background:var(--white);color:var(--ink-2);font-weight:700;cursor:pointer}
.seg button.active{background:var(--brand-800);color:var(--white)}
#recStatus{margin-top:8px;min-height:20px}
#adjustBtn{display:block;margin:6px auto 0}

/* live */
.live-banner{font-size:22px;font-weight:800;text-align:center;border-radius:14px;padding:16px 12px;background:var(--brand-100);color:var(--brand-900);margin-bottom:10px;transition:background .25s}
.live-banner.armed{background:var(--brand-600);color:var(--white);font-size:28px;animation:ready 1.4s ease-in-out infinite}
.live-banner.flight{background:var(--accent);color:var(--brand-900)}
.live-banner.hold,.live-banner.done{background:var(--brand-800);color:var(--white)}
.live-banner.fail{background:var(--danger-soft);color:var(--danger-ink)}
@keyframes ready{50%{box-shadow:0 0 0 8px color-mix(in srgb,var(--brand-600) 25%,transparent)}}
#liveDone[hidden],#livePanel[hidden]{display:none}
.toggle{display:flex;align-items:center;gap:12px;min-height:44px;font-size:16px;cursor:pointer}
.toggle input{width:24px;height:24px;accent-color:var(--brand-600);flex:none}


/* sheet (adjust) */
.sheet{position:fixed;left:0;right:0;bottom:0;z-index:30;background:var(--white);border-radius:20px 20px 0 0;box-shadow:0 -8px 30px rgba(0,0,0,.2);height:50vh;display:flex;flex-direction:column;animation:up .25s ease;max-width:760px;margin:0 auto}
.sheet[hidden]{display:none}
@keyframes up{from{transform:translateY(30px);opacity:0}to{transform:none;opacity:1}}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--line)}
.sheet-head h2{margin:0}
.sheet-body{overflow:auto;padding:8px 16px calc(16px + env(safe-area-inset-bottom))}
.adj-group{border-bottom:1px solid var(--line);padding:12px 0}
.adj-group:last-child{border:0}
.field{display:flex;flex-direction:column;gap:6px;margin:8px 0;font-weight:600}
.field select{min-height:44px;border:2px solid var(--line);border-radius:10px;padding:0 10px;background:var(--white);font-weight:500}
.field input[type=range]{width:100%;height:44px;accent-color:var(--brand-600)}
.field input[type=color]{width:64px;height:44px;border:2px solid var(--line);border-radius:10px;padding:2px;background:var(--white)}
.range-ends{display:flex;align-items:center;gap:10px;font-weight:500}
.range-ends input{flex:1}
.hint{font-size:15px;color:var(--ink-2)}
.stats{white-space:pre-wrap;font-size:14px;color:var(--ink-2);font-variant-numeric:tabular-nums}
body.sheet-open main{padding-bottom:52vh}
body.sheet-open .stepper,body.sheet-open .src-name{display:none}
body.sheet-open .card{display:none!important}

/* modals */
.modal{position:fixed;inset:0;z-index:40;background:color-mix(in srgb,var(--brand-900) 55%,transparent);display:flex;align-items:flex-end;justify-content:center;padding:12px;animation:fade .2s ease}
.modal[hidden]{display:none}
.modal-card{background:var(--white);border-radius:22px;max-width:520px;width:100%;max-height:92vh;overflow:auto;padding:20px;position:relative;box-shadow:0 10px 40px rgba(0,0,0,.3)}
@media (min-width:640px){.modal{align-items:center}}
.hero{width:100%;height:auto;display:block;border-radius:14px;margin:0 0 14px}
.slides .slide{display:none}.slides .slide.active{display:block;animation:fade .25s ease}
.skip{position:absolute;top:10px;right:12px;background:rgba(255,255,255,.9);border:0;color:var(--brand-800);font-weight:700;min-height:44px;padding:0 12px;border-radius:999px;cursor:pointer;z-index:2}
.dots{display:flex;justify-content:center;gap:8px;margin:8px 0}
.dots i{width:9px;height:9px;border-radius:50%;background:var(--line)}.dots i.on{background:var(--brand-600);width:22px;border-radius:6px}
.tip-list{padding-left:20px;margin:0}.tip-list li{margin:0 0 8px}
.err-icon{font-size:36px}
.err ul{padding-left:20px;margin:6px 0 10px}.err li{margin-bottom:6px}

/* footer */
.foot{max-width:980px;margin:0 auto;padding:10px 16px calc(18px + env(safe-area-inset-bottom));text-align:center;color:var(--ink-2);font-size:14px}
.foot p{margin:4px 0}
body[data-view=live] .foot,body.sheet-open .foot{display:none}

/* practice game (reuses game.js) */
.game-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.game-head h1{margin:0}
.loadrow{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:8px 0}
.seg#diffSeg button.active{background:var(--brand-800);color:var(--white)}
.hud{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:8px 0}
.hud>div{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:6px 8px;text-align:center}
.hud .k{display:block;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.hud .v{font-size:19px;font-weight:800;font-variant-numeric:tabular-nums}
.game-wrap{border-radius:var(--radius);overflow:hidden;background:var(--game-bg)}
#gameCanvas{display:block;width:100%;touch-action:none;cursor:none;user-select:none;-webkit-user-select:none}
@media (max-width:640px){
  h1{font-size:25px}
  .stepper li{font-size:13px;padding:5px 6px}
  .hud{grid-template-columns:repeat(3,1fr)}.hud .v{font-size:16px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}