:root{--brand: #0f4c81;--brand-dark: #0b3a63;--ink: #1a1a1a;--muted: #6b7280;--line: #e5e7eb;--bg: #f7f8fa;--card: #ffffff;--warn: #b45309;--radius: 12px}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:16px;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}h1{font-size:1.5rem;margin:0 0 .25rem}h2{font-size:1.1rem;margin:0 0 .5rem}p{margin:0 0 1rem;line-height:1.45}.muted{color:var(--muted)}.app{min-height:100%;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:calc(env(safe-area-inset-top) + 12px) 16px 12px;background:var(--brand);color:#fff}.brand{font-weight:700;letter-spacing:.02em}.brand.large{font-size:1.4rem;color:var(--brand);margin-bottom:4px}.proto{font-size:.7rem;font-weight:700;letter-spacing:.08em;color:var(--warn);background:#fff7ed;padding:2px 8px;border-radius:999px}.topbar .proto{background:#ffffff26;color:#ffd7a8}.content{flex:1;padding:16px;padding-bottom:calc(env(safe-area-inset-bottom) + 24px)}.screen{min-height:100%;padding:16px}.screen.center{display:flex;align-items:center;justify-content:center}.page{display:flex;flex-direction:column;gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.card.narrow{width:100%;max-width:380px;text-align:center}.card.narrow .proto{display:inline-block;margin-bottom:20px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;width:100%;font-size:1rem;font-weight:600;border-radius:var(--radius);border:1px solid transparent;cursor:pointer}.btn.primary{background:var(--brand);color:#fff}.btn.primary:active{background:var(--brand-dark)}.btn.ghost{background:transparent;color:var(--brand);border-color:var(--line)}