:root{--bg: #0f1115;--surface: #171a21;--surface-2: #1f232c;--border: #272c37;--text: #f2f3f5;--muted: #9aa1ae;--accent: #2fbfa4;--accent-ink: #06201a;--danger: #ef6b6b;color-scheme:dark}@media(prefers-color-scheme:light){:root{--bg: #f6f7f5;--surface: #ffffff;--surface-2: #eceeea;--border: #dfe2dc;--text: #16181d;--muted: #5d6572;--accent: #178a75;--accent-ink: #ffffff;--danger: #c43d3d;color-scheme:light}}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text)}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-tap-highlight-color:transparent}button,input{font:inherit;color:inherit}.app{max-width:720px;margin:0 auto;padding:calc(env(safe-area-inset-top,0px) + 20px) 16px calc(env(safe-area-inset-bottom,0px) + 110px)}.top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:16px}h1{font-size:1.6rem;margin:0;letter-spacing:-.01em}.sub{margin:2px 0 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20px);width:58px;height:58px;border-radius:18px;border:0;cursor:pointer;background:var(--accent);color:var(--accent-ink);display:flex;align-items:center;justify-content:center;box-shadow:0 10px 28px #0006}.sheet-backdrop{position:fixed;inset:0;z-index:30;background:#0000008c;display:flex;align-items:flex-end;justify-content:center}.sheet{width:100%;max-width:560px;background:var(--surface);border-radius:22px 22px 0 0;border:1px solid var(--border);padding:22px 18px calc(env(safe-area-inset-bottom,0px) + 18px);display:grid;gap:14px;max-height:92vh;overflow-y:auto}.sheet h2{margin:0 0 2px;font-size:1.15rem}.sheet label{display:grid;gap:6px;font-size:.82rem;font-weight:600;color:var(--muted)}.optional{font-weight:400;opacity:.8}.sheet input{width:100%;padding:12px 14px;background:var(--bg);border:1px solid var(--border);border-radius:12px;font-size:1rem;color:var(--text);font-weight:400}.sheet-actions{display:flex;gap:8px;align-items:center;margin-top:4px}.spacer{flex:1}.error{margin:0;color:var(--danger);font-size:.85rem}.toast{position:fixed;left:50%;bottom:calc(env(safe-area-inset-bottom,0px) + 96px);transform:translate(-50%);background:var(--text);color:var(--bg);padding:10px 16px;border-radius:999px;font-size:.85rem;font-weight:600;z-index:40}@media(min-width:640px){.grid{grid-template-columns:repeat(2,1fr)}.sheet-backdrop{align-items:center}.sheet{border-radius:22px}}.install-banner{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:12px 0 4px;padding:14px;background:var(--surface);border:1px solid 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