:root{color-scheme:light dark;--bg:#fafafa;--fg:#171717;--muted:#5c5c5c;--line:#e2e2e2;--card:#fff;--accent:#171717;--on-accent:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#141414;--fg:#ececec;--muted:#a3a3a3;--line:#2c2c2c;--card:#1c1c1c;--accent:#ececec;--on-accent:#141414}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:34rem;margin:0 auto;padding:48px 20px 64px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}
.brand{font-weight:650;letter-spacing:-.01em}.brand span{color:var(--muted);font-weight:400}
h1{font-size:1.6rem;line-height:1.25;margin:0 0 8px;letter-spacing:-.02em}p{margin:0 0 16px}.muted{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px;margin:24px 0}
label{display:block;font-weight:550;margin:16px 0 6px}input,textarea{width:100%;font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:inherit}
.hint{font-size:.9rem;color:var(--muted);margin-top:6px}
.button{display:inline-flex;justify-content:center;align-items:center;width:100%;font:inherit;font-weight:600;padding:12px 16px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:inherit;text-decoration:none;cursor:pointer;margin-top:12px}
.button.primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.or{text-align:center;color:var(--muted);margin:16px 0}.row{display:flex;justify-content:space-between;gap:16px;padding:8px 0;border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:0}.total{font-size:1.25rem;font-weight:650}.alert{border:1px solid var(--line);border-left:4px solid var(--fg);padding:10px 12px;border-radius:6px}
.links{display:flex;flex-direction:column;gap:6px;margin-top:24px}.links a,.link{color:inherit}
form.inline{display:inline}form.inline button{background:none;border:0;padding:0;font:inherit;color:var(--muted);text-decoration:underline;cursor:pointer}
footer{margin-top:40px;font-size:.9rem;color:var(--muted);display:flex;gap:16px;flex-wrap:wrap}