:root {
  --bg: #f3f5f8; --card: #ffffff; --text: #111827; --muted: #5b6676; --line: #e5e8ee; --brand: #0e7490; --brand-ink: #ffffff;
  --ok-bg: #e7f6ec; --ok: #166534; --warn-bg: #fff4d6; --warn: #7a4b00; --bad-bg: #fde8e8; --bad: #9b1c1c; --focus: #0e7490;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1218; --card: #161d26; --text: #eaf0f6; --muted: #9aa8b8; --line: #263140; --brand: #22b3d4; --brand-ink: #04222b;
    --ok-bg: #12301f; --ok: #7be0a2; --warn-bg: #3a2c0a; --warn: #f2c96b; --bad-bg: #3a1616; --bad: #ff9d9d; --focus: #22b3d4;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; min-height: 100vh; display: flex; flex-direction: column; }
.top { background: var(--brand); color: var(--brand-ink); padding: 18px 20px; font-weight: 800; font-size: 19px; letter-spacing: -0.2px; }
main { flex: 1; width: 100%; max-width: 560px; margin: 0 auto; padding: 18px 16px 8px; }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 14px 16px 26px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px 20px; box-shadow: 0 1px 2px rgba(0,0,0,.04); }
.center { text-align: center; padding: 38px 20px; }
.eyebrow { margin: 0 0 4px; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: 1.3px; text-transform: uppercase; }
h1 { margin: 0 0 6px; font-size: 24px; line-height: 1.2; letter-spacing: -0.5px; }
.for { margin: 0 0 14px; color: var(--muted); }
.banner { border-radius: 12px; padding: 12px 14px; margin: 14px 0; font-weight: 600; }
.banner.ok { background: var(--ok-bg); color: var(--ok); }
.banner.warn { background: var(--warn-bg); color: var(--warn); }
.banner.bad { background: var(--bad-bg); color: var(--bad); }
.lines { width: 100%; border-collapse: collapse; margin-top: 8px; }
.lines td { padding: 11px 0; border-top: 1px solid var(--line); vertical-align: top; }
.lines td.price { text-align: right; font-weight: 700; white-space: nowrap; padding-left: 12px; }
.lines .sub { display: block; color: var(--muted); font-size: 13.5px; font-weight: 400; }
.total { display: flex; justify-content: space-between; align-items: baseline; border-top: 2px solid var(--text); margin-top: 6px; padding-top: 12px; }
.total span { font-weight: 800; }
.total strong { font-size: 30px; letter-spacing: -1px; }
.note { color: var(--muted); margin: 16px 0 0; white-space: pre-wrap; }
form { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
label { display: block; font-weight: 700; margin-bottom: 6px; }
input[type=text] { width: 100%; font: inherit; padding: 14px 14px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--bg); color: var(--text); }
input[type=text]:focus, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
button { font: inherit; cursor: pointer; border: 0; border-radius: 14px; }
button.primary { width: 100%; margin-top: 14px; padding: 16px; background: var(--brand); color: var(--brand-ink); font-weight: 800; font-size: 17px; }
button.danger { width: 100%; margin-top: 10px; padding: 14px; background: var(--bad-bg); color: var(--bad); font-weight: 800; }
button.link { display: block; margin: 12px auto 0; background: none; color: var(--muted); text-decoration: underline; padding: 10px; }
button:disabled { opacity: .55; cursor: default; }
.err { color: var(--bad); font-weight: 600; margin: 10px 0 0; }
.small { color: var(--muted); font-size: 13.5px; margin: 14px 0 0; }
.confirm { margin-top: 22px; padding: 16px; border-radius: 14px; background: var(--bad-bg); }
.confirm p { margin: 0 0 6px; color: var(--bad); }
.spin { width: 28px; height: 28px; margin: 0 auto 12px; border: 3px solid var(--line); border-top-color: var(--brand); border-radius: 50%; animation: s 0.9s linear infinite; }
@keyframes s { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spin { animation: none; } }
[hidden] { display: none !important; }