:root {
  --bg: #fffaf3; --card: #ffffff; --ink: #1c1917; --muted: #78716c; --line: #e7e5e4;
  --brand: #c2410c; --brand-ink: #ffffff; --ok: #15803d; --warn: #b45309; --warn-bg: #fef3c7; --lock-bg: #f5f5f4;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1c1917; --card: #292524; --ink: #fafaf9; --muted: #a8a29e; --line: #44403c;
          --brand: #ea580c; --warn: #fbbf24; --warn-bg: #422006; --lock-bg: #3a3633; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 18px/1.5 system-ui, "Noto Sans TC", "PingFang TC", sans-serif; }
#app { max-width: 560px; margin: 0 auto; padding: 0 16px 120px; padding-top: env(safe-area-inset-top, 0px); }
h1 { font-size: 1.45rem; margin: 18px 0 2px; }
h2 { font-size: 1.1rem; margin: 22px 0 8px; color: var(--muted); }
.center { text-align: center; } .muted { color: var(--muted); } .small { font-size: .9rem; }
.row { display: flex; align-items: center; gap: 10px; }
.grow { flex: 1; min-width: 0; }
.item { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; margin: 8px 0; }
.item.locked { background: var(--lock-bg); }
.name { font-weight: 600; }
.price { color: var(--brand); font-weight: 700; white-space: nowrap; }
.chip { display: inline-block; font-size: .8rem; padding: 1px 8px; border-radius: 99px; border: 1px solid var(--brand); color: var(--brand); margin-left: 6px; }
.qty { display: flex; align-items: center; gap: 4px; }
.qty b { min-width: 2ch; text-align: center; font-size: 1.15rem; }
button { font: inherit; cursor: pointer; border: 0; border-radius: 12px; }
.qbtn { width: 44px; height: 44px; background: var(--brand); color: var(--brand-ink); font-size: 1.5rem; line-height: 1; }
.qbtn.minus { background: transparent; color: var(--brand); border: 2px solid var(--brand); }
.qbtn[disabled] { opacity: .35; }
.btn { display: block; width: 100%; padding: 14px; background: var(--brand); color: var(--brand-ink); font-weight: 700; text-align: center; text-decoration: none; border-radius: 14px; }
.btn.ghost { background: transparent; color: var(--brand); border: 2px solid var(--brand); }
.btn[disabled] { opacity: .45; }
.btn + .btn { margin-top: 10px; }
.banner { border-radius: 14px; padding: 10px 14px; margin: 12px 0; background: var(--warn-bg); color: var(--warn); font-weight: 600; }
.banner.ok { background: #dcfce7; color: var(--ok); }
@media (prefers-color-scheme: dark) { .banner.ok { background: #052e16; color: #4ade80; } }
.bar { position: fixed; left: 0; right: 0; bottom: 0; padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px)); background: var(--bg); border-top: 1px solid var(--line); }
.bar .btn { max-width: 560px; margin: 0 auto; }
.total { display: flex; justify-content: space-between; font-size: 1.3rem; font-weight: 800; margin: 16px 0 4px; }
.seg { display: flex; gap: 10px; margin: 10px 0; }
.seg button { flex: 1; padding: 14px; background: var(--card); border: 2px solid var(--line); color: var(--ink); font-weight: 600; }
.seg button.on { border-color: var(--brand); color: var(--brand); }
.back { background: none; color: var(--brand); padding: 14px 0 0; font-weight: 600; }
.ticket { text-align: center; margin-top: 8vh; }
.ticket .no { font-size: 6.5rem; font-weight: 900; line-height: 1.1; letter-spacing: 2px; color: var(--brand); }
.ticket .st { font-size: 1.5rem; font-weight: 700; margin: 8px 0 24px; }
body.ready { background: #16a34a; color: #fff; }
body.ready .ticket .no, body.ready .muted { color: #fff; }
body.ready .btn { background: #fff; color: #15803d; }
body.ready .btn.ghost { background: transparent; color: #fff; border-color: #fff; }