:root{
  --bg:#f7f5fb;--card:#fff;--ink:#171320;--muted:#777281;--line:#e8e3ef;
  --brand:#24184f;--brand-soft:#ece8f7;--danger:#b33a3a;--shadow:0 14px 36px rgba(29,19,61,.08);
  --green:#55745d
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Segoe UI",sans-serif}
body{min-height:100dvh}
button,input{font:inherit}button{-webkit-tap-highlight-color:transparent}
.app-shell{width:min(100%,520px);min-height:100dvh;margin:0 auto;padding:max(24px,env(safe-area-inset-top)) 18px max(28px,env(safe-area-inset-bottom))}
.app-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:10px 4px 18px}
.brand,.eyebrow{margin:0;color:var(--brand);font-size:12px;font-weight:800;letter-spacing:.14em}
h1,h2{margin:6px 0 0}h1{font-size:clamp(30px,8vw,42px);line-height:1.08;letter-spacing:-.04em}h2{font-size:24px;letter-spacing:-.03em}
.sub{margin:9px 0 0;color:var(--muted);font-size:13px;font-weight:700}
.icon-btn{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.78);color:var(--ink);font-size:20px;cursor:pointer}

.guide-card{display:grid;grid-template-columns:90px 1fr;gap:14px;align-items:center;padding:15px 17px;margin-bottom:12px;background:var(--brand-soft);border-radius:20px}
.guide-card strong{display:block;font-size:14px}.guide-card p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
.phone-guide{height:68px;position:relative}.phone-shape{position:absolute;left:22px;bottom:0;width:43px;height:60px;border:2px solid var(--brand);border-radius:9px;background:#fff;display:grid;place-items:start center;color:var(--brand);font-weight:900;padding-top:5px}
.cup-dot{position:absolute;left:40px;top:0;width:8px;height:8px;border-radius:50%;background:var(--brand)}.cup-label{position:absolute;left:52px;top:-4px;color:var(--brand);font-size:10px;font-weight:850}

.measure-card,.read-card{padding:22px;background:var(--card);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}
.cup-axis{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--brand);font-size:12px;font-weight:850}.axis-line{width:36px;height:1px;background:var(--brand)}
.level-stage{position:relative;width:min(76vw,340px);aspect-ratio:1;margin:14px auto 5px;border-radius:50%;background:#faf9fc;overflow:hidden}
.level-ring{position:absolute;inset:13%;border:2px solid var(--line);border-radius:50%}
.crosshair{position:absolute;left:50%;top:50%;background:var(--line);transform:translate(-50%,-50%)}.crosshair.horizontal{width:72%;height:1px}.crosshair.vertical{width:1px;height:72%}
.bubble{position:absolute;left:50%;top:50%;width:32px;height:32px;border-radius:50%;background:var(--brand);transform:translate(-50%,-50%);transition:left .08s linear,top .08s linear}
.slope-arrow{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:58px;font-weight:300;color:rgba(36,24,79,.22);z-index:0}
.stage-label{position:absolute;color:var(--muted);font-size:10px;font-weight:800}.stage-label.top{top:6px;left:50%;transform:translateX(-50%)}.stage-label.bottom{bottom:6px;left:50%;transform:translateX(-50%)}.stage-label.left{left:7px;top:50%;transform:translateY(-50%)}.stage-label.right{right:7px;top:50%;transform:translateY(-50%)}

.result-main{text-align:center;padding:8px 0 18px}.direction-label{margin:0 0 5px;color:var(--brand);font-size:17px;font-weight:900;letter-spacing:-.02em}.result-main>strong{display:block;font-size:48px;letter-spacing:-.06em}.result-main>span{display:block;margin-top:4px;color:var(--muted);font-size:12px;font-weight:750}
.axis-results{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:15px}.axis-results>div{padding:12px;border:1px solid var(--line);border-radius:15px;background:#faf9fc}.axis-results span{display:block;color:var(--muted);font-size:11px;font-weight:750}.axis-results strong{display:block;margin-top:5px;font-size:14px}
.primary-btn,.secondary-btn{width:100%;min-height:56px;border-radius:18px;font-size:16px;font-weight:850;cursor:pointer}.primary-btn{border:0;background:var(--brand);color:#fff}.secondary-btn{margin-top:8px;border:1px solid var(--brand);background:#fff;color:var(--brand)}.secondary-btn:disabled{opacity:.38;cursor:default}.primary-btn.compact{min-height:50px;margin-top:16px}
.status{margin:10px 2px 0;color:var(--muted);font-size:11px;line-height:1.5;text-align:center}

.read-card{margin-top:12px}.section-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.experimental{padding:6px 9px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:10px;font-weight:900}
.controls{margin-top:18px}.controls label>span,fieldset legend{display:block;margin-bottom:8px;color:var(--ink);font-size:12px;font-weight:850}.distance-row{display:grid;grid-template-columns:1fr 58px;gap:12px;align-items:center}.distance-row input{width:100%;accent-color:var(--brand)}.distance-row strong{text-align:right;color:var(--brand)}
fieldset{margin:18px 0 0;padding:0;border:0}.segmented{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.segmented label{position:relative}.segmented input{position:absolute;opacity:0;pointer-events:none}.segmented span{display:block;padding:11px 4px;border:1px solid var(--line);border-radius:13px;text-align:center;color:var(--muted);font-size:12px;font-weight:850;cursor:pointer}.segmented input:checked+span{border-color:var(--brand);background:var(--brand-soft);color:var(--brand)}
.line-visual{margin-top:10px}.line-visual svg{display:block;width:100%;height:auto;max-height:320px}.hole{fill:var(--brand)}.ball{fill:#fff;stroke:var(--ink);stroke-width:2}.svg-label{fill:var(--muted);font-size:11px;font-weight:700}.aim-guide{stroke:var(--muted);stroke-width:2;stroke-dasharray:5 6;fill:none}.ball-path{stroke:var(--brand);stroke-width:5;stroke-linecap:round;fill:none}
.aim-result{text-align:center;padding:14px;border-radius:18px;background:var(--brand-soft)}.aim-result>span{display:block;color:var(--muted);font-size:11px;font-weight:750}.aim-result>strong{display:block;margin-top:6px;color:var(--brand);font-size:21px;letter-spacing:-.03em}.aim-result>small{display:block;margin-top:6px;color:var(--muted);font-size:10px;line-height:1.45}

.install-btn{width:100%;margin-top:12px;padding:15px;border:1px solid var(--brand);border-radius:16px;background:transparent;color:var(--brand);font-weight:800;cursor:pointer}
.update-banner{margin-top:12px;padding:13px 14px;border:1px solid var(--brand);border-radius:16px;background:#fff;display:flex;align-items:center;justify-content:space-between;gap:12px}.update-banner[hidden]{display:none}.update-banner strong{display:block;font-size:13px}.update-banner span{display:block;margin-top:2px;color:var(--muted);font-size:11px}.update-banner button{flex:0 0 auto;padding:10px 12px;border:0;border-radius:12px;background:var(--brand);color:#fff;font-size:12px;font-weight:850;cursor:pointer}
.footer{padding:28px 10px 8px;text-align:center;color:var(--muted);font-size:11px;line-height:1.75}.footer a{color:var(--brand);text-decoration:none;font-weight:800}.footer p{margin:3px 0}
.dialog{width:min(calc(100% - 30px),470px);max-height:88dvh;padding:0;border:0;border-radius:26px;background:transparent}.dialog::backdrop{background:rgba(18,12,31,.52);backdrop-filter:blur(4px)}.dialog-card{max-height:88dvh;overflow:auto;padding:24px;background:#fff;border-radius:26px}.dialog-title-row{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.dialog-copy{margin:14px 0;color:var(--muted);font-size:14px;line-height:1.75}.notice{margin-top:12px;padding:14px;border-radius:16px;background:#faf9fc;border:1px solid var(--line)}.notice strong{font-size:12px}.notice p{margin:5px 0 0;color:var(--muted);font-size:11px;line-height:1.6}
.toast{position:fixed;left:50%;bottom:calc(28px + env(safe-area-inset-bottom));transform:translate(-50%,20px);max-width:calc(100% - 36px);padding:12px 16px;border-radius:999px;background:#18131f;color:#fff;font-size:13px;font-weight:750;opacity:0;pointer-events:none;transition:.18s ease;white-space:nowrap;z-index:30}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:380px){.guide-card{grid-template-columns:76px 1fr}.axis-results{grid-template-columns:1fr}.measure-card,.read-card{padding:18px}}