:root {
  --bg: #f4f4f1;
  --card: #ffffff;
  --ink: #1b1b19;
  --muted: #6b6b66;
  --line: #e2e1dc;
  --accent: #1f6f5c;
  --accent-ink: #ffffff;
  --accent-soft: #e3f0ec;
  --warn: #9a5b00;
  --warn-soft: #fbf0dc;
  --danger: #b3261e;
  --danger-soft: #fbe5e3;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --radius: 14px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151514; --card: #1f1f1d; --ink: #ecebe6; --muted: #a09f98; --line: #34332f;
    --accent: #4fb89c; --accent-ink: #08201a; --accent-soft: #19332c;
    --warn: #e7b360; --warn-soft: #3a2c14; --danger: #f08a80; --danger-soft: #3d1c19;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #151514; --card: #1f1f1d; --ink: #ecebe6; --muted: #a09f98; --line: #34332f;
  --accent: #4fb89c; --accent-ink: #08201a; --accent-soft: #19332c;
  --warn: #e7b360; --warn-soft: #3a2c14; --danger: #f08a80; --danger-soft: #3d1c19;
  color-scheme: dark;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body {
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  -webkit-text-size-adjust: 100%;
  min-height: 100dvh;
}
button, input, select { font: inherit; color: inherit; }
.boot { padding: 40px 16px; color: var(--muted); }
.mono { font-family: var(--mono); letter-spacing: 0.02em; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.hidden { display: none !important; }

/* ---------- 布局 ---------- */
.shell { max-width: 640px; margin: 0 auto; padding: calc(var(--safe-t) + 12px) 16px calc(84px + var(--safe-b)); }
.top { display: flex; align-items: center; gap: 10px; padding: 4px 0 12px; }
.top h1 { font-size: 20px; line-height: 1.25; margin: 0; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); white-space: nowrap; }
.chip.dealer { background: var(--warn-soft); color: var(--warn); }
.icon-btn { border: 1px solid var(--line); background: var(--card); border-radius: 10px; padding: 6px 12px; font-size: 14px; }

.banner { display: flex; gap: 10px; align-items: center; background: var(--warn-soft); color: var(--warn);
  border-radius: var(--radius); padding: 10px 12px; margin-bottom: 12px; font-size: 14px; }
.banner span { flex: 1; }
.banner button { border: 0; background: var(--warn); color: var(--card); border-radius: 9px; padding: 6px 12px; font-weight: 600; white-space: nowrap; }

.search { width: 100%; border: 1px solid var(--line); background: var(--card); border-radius: 12px; padding: 10px 12px; margin-bottom: 10px; }
.list { display: flex; flex-direction: column; gap: 8px; }
.item { display: block; width: 100%; text-align: left; border: 1px solid var(--line); background: var(--card); border-radius: var(--radius); padding: 12px 14px; }
.item .row { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.item .id { font-family: var(--mono); font-size: 17px; font-weight: 600; }
.item .sub { color: var(--muted); font-size: 13px; margin-top: 2px; overflow-wrap: anywhere; }
.empty { text-align: center; color: var(--muted); padding: 40px 12px; }
.section-title { font-size: 13px; color: var(--muted); margin: 18px 4px 6px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 12px; }
.card h2 { font-size: 17px; margin: 0 0 6px; }
.card p { margin: 0 0 10px; }

.btn { display: block; width: 100%; border: 0; border-radius: 12px; padding: 13px 14px; font-weight: 600; text-align: center;
  background: var(--accent); color: var(--accent-ink); margin-top: 10px; }
.btn.secondary { background: var(--card); color: var(--ink); border: 1px solid var(--line); font-weight: 500; }
.btn.danger { background: var(--danger); color: #fff; }
.btn:disabled { opacity: 0.5; }
.btn-row { display: flex; gap: 8px; }
.btn-row .btn { flex: 1; }
.file-label { position: relative; overflow: hidden; }
.file-label input { position: absolute; inset: 0; opacity: 0; width: 100%; }

/* ---------- 底部标签 ---------- */
.tabs { position: fixed; left: 0; right: 0; bottom: 0; background: var(--card); border-top: 1px solid var(--line);
  display: flex; justify-content: center; padding: 6px 4px calc(6px + var(--safe-b)); z-index: 5; }
.tabs .inner { display: flex; width: 100%; max-width: 640px; }
.tabs button { flex: 1; border: 0; background: none; padding: 8px 2px; font-size: 13px; color: var(--muted); border-radius: 10px; }
.tabs button[aria-current="page"] { color: var(--accent); font-weight: 700; background: var(--accent-soft); }

/* ---------- 表单 ---------- */
.field { margin: 10px 0; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.field input, .field select { width: 100%; border: 1px solid var(--line); background: var(--bg); border-radius: 11px; padding: 11px 12px; font-size: 17px; }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.seg { display: grid; grid-template-columns: 1fr 1fr; background: var(--bg); border: 1px solid var(--line); border-radius: 11px; padding: 3px; margin: 12px 0 4px; }
.seg button { border: 0; background: none; padding: 9px; border-radius: 9px; color: var(--muted); }
.seg button[aria-pressed="true"] { background: var(--card); color: var(--ink); font-weight: 700; box-shadow: 0 1px 2px rgba(0,0,0,.12); }
.seg button.sub[aria-pressed="true"] { color: var(--danger); }
.error { color: var(--danger); font-size: 14px; margin-top: 8px; min-height: 1em; }

dl.info { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; margin: 0; font-size: 14px; }
dl.info dt { color: var(--muted); }
dl.info dd { margin: 0; overflow-wrap: anywhere; }

/* ---------- 弹层 ---------- */
#layer:empty { display: none; }
.scrim { position: fixed; inset: 0; background: rgba(0,0,0,.38); z-index: 20; display: flex; align-items: flex-end; justify-content: center; }
.sheet { background: var(--card); width: 100%; max-width: 640px; max-height: 92dvh; overflow-y: auto; border-radius: 18px 18px 0 0;
  padding: 10px 16px calc(18px + var(--safe-b)); animation: up .18s ease-out; }
@keyframes up { from { transform: translateY(24px); opacity: .6; } to { transform: none; opacity: 1; } }
@media (min-width: 700px) { .scrim { align-items: center; } .sheet { border-radius: 18px; } }
.sheet .grab { width: 38px; height: 5px; border-radius: 3px; background: var(--line); margin: 2px auto 10px; }
.sheet h2 { font-size: 19px; margin: 4px 0 8px; }
.sheet p { margin: 6px 0; }
.code-box { font-family: var(--mono); font-size: 24px; line-height: 1.5; font-weight: 600; letter-spacing: 0.04em; word-spacing: 0.25em;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 10px 0; user-select: all; -webkit-user-select: all; overflow-wrap: anywhere; }
.code-box.subtract { border-color: var(--danger); }
.note { background: var(--bg); border-radius: 11px; padding: 10px 12px; font-size: 13px; color: var(--muted); margin-top: 10px; }
.note.warn { background: var(--warn-soft); color: var(--warn); }
.note.danger { background: var(--danger-soft); color: var(--danger); }

.hist { border-bottom: 1px solid var(--line); padding: 10px 2px; }
.hist:last-child { border-bottom: 0; }
.hist .row { display: flex; justify-content: space-between; gap: 8px; }
.hist .act { font-weight: 600; }
.hist .act.sub { color: var(--danger); }
.hist .act.add { color: var(--accent); }
.hist .code { font-family: var(--mono); font-size: 13px; color: var(--muted); overflow-wrap: anywhere; }
.copy-link { border: 0; background: none; color: var(--accent); padding: 0; font-size: 13px; }

#toast { position: fixed; left: 50%; top: calc(var(--safe-t) + 14px); transform: translateX(-50%); background: var(--ink); color: var(--bg);
  padding: 9px 16px; border-radius: 99px; font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 40; max-width: 90vw; text-align: center; }
#toast.show { opacity: 1; }

.hero { padding: 28px 4px 8px; }
.hero h1 { font-size: 26px; margin: 0 0 6px; }
.hero p { color: var(--muted); margin: 0; }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; vertical-align: -3px; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }