:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #16202a;
  --muted: #667788;
  --line: #e3e8ee;
  --accent: #0f766e;
  --accent-soft: #e6f4f2;
  --ok: #15803d;
  --warn: #b45309;
  --err: #b91c1c;
  --shadow: 0 1px 2px rgba(16, 32, 42, .06), 0 8px 24px -12px rgba(16, 32, 42, .18);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1418;
    --card: #161d23;
    --text: #e6edf3;
    --muted: #93a2b1;
    --line: #26313a;
    --accent: #2dd4bf;
    --accent-soft: #10302e;
    --ok: #4ade80;
    --warn: #fbbf24;
    --err: #f87171;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 30px -18px rgba(0, 0, 0, .8);
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }

.hero {
  padding: 56px 0 36px;
  background:
    radial-gradient(1200px 400px at 20% -10%, var(--accent-soft), transparent 70%),
    var(--bg);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--accent); font-weight: 650; letter-spacing: .02em;
  font-size: 15px;
}
.logo { width: 22px; height: 22px; }

.hero h1 {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.2;
  letter-spacing: -.02em;
  margin: 18px 0 12px;
}

.lead { margin: 0 0 8px; color: var(--muted); max-width: 46em; }
.lead.strong { color: var(--text); font-weight: 550; }

main.wrap { padding-top: 28px; padding-bottom: 8px; }

/* ---------- 上传区 ---------- */
.drop {
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  background: var(--card);
  padding: 38px 22px;
  text-align: center;
  transition: border-color .15s, background .15s, transform .15s;
  cursor: pointer;
}
.drop:hover, .drop:focus-visible { border-color: var(--accent); outline: none; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); transform: scale(1.005); }
.drop-icon { width: 40px; height: 40px; color: var(--accent); opacity: .9; }
.drop-title { font-weight: 600; margin: 12px 0 4px; }
.drop-sub { color: var(--muted); font-size: 14px; margin: 0 0 18px; }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  border-radius: 10px;
  padding: 9px 18px;
  font: inherit;
  font-size: 15px;
  font-weight: 550;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover { filter: brightness(1.06); color: #fff; }
.btn.ghost { background: transparent; }
.btn.small { padding: 6px 12px; font-size: 13.5px; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.options {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-top: 18px;
}
.spacer { flex: 1; }

.switch { display: flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.track {
  width: 40px; height: 22px; border-radius: 999px;
  background: var(--line); position: relative; flex: none;
  transition: background .15s;
}
.track::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, .25);
  transition: transform .15s;
}
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(18px); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 2px; }
.switch-text { font-size: 14.5px; }
.switch-text em { color: var(--muted); font-style: normal; font-size: 13px; }

/* ---------- 任务卡片 ---------- */
.list { margin-top: 26px; display: grid; gap: 18px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-head {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
.card-name {
  font-weight: 600; font-size: 14.5px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  min-width: 0; flex: 1;
}
.card-meta { color: var(--muted); font-size: 12.5px; flex: none; }

.status {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; color: var(--muted); font-size: 14px;
}
.status .dot {
  width: 10px; height: 10px; border-radius: 50%; flex: none;
  background: var(--accent);
  animation: pulse 1.1s ease-in-out infinite;
}
.status.ok .dot { animation: none; background: var(--ok); }
.status.err .dot { animation: none; background: var(--err); }
@keyframes pulse { 0%, 100% { opacity: .3 } 50% { opacity: 1 } }

.bar {
  height: 4px; margin: -6px 16px 10px;
  background: var(--line); border-radius: 999px; overflow: hidden;
}
.bar i {
  display: block; height: 100%; width: 0;
  background: var(--accent); border-radius: 999px;
  transition: width .2s ease;
}

.log {
  padding: 0 16px 12px; margin: 0; list-style: none;
  color: var(--muted); font-size: 12.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.log li { padding: 1px 0; }
.log li::before { content: "› "; color: var(--accent); }

.body { padding: 16px; display: grid; gap: 16px; }

.preview { position: relative; display: flex; justify-content: center; }
.preview canvas {
  display: block; max-width: 100%; max-height: 340px;
  width: auto; height: auto;
  border-radius: 10px; border: 1px solid var(--line);
  background: #fff;
}

.result {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: start;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, transparent, rgba(15, 118, 110, .03));
}
.result.fail { display: block; color: var(--muted); }

.result-main { min-width: 0; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.badge {
  font-size: 12px; padding: 3px 9px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  white-space: nowrap;
}
.badge.ok { background: transparent; color: var(--ok); border-color: color-mix(in srgb, var(--ok) 35%, transparent); }

.text {
  margin: 0;
  font: 14px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  word-break: break-all;
  white-space: pre-wrap;
  max-height: 9.5em;
  overflow: auto;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}
.text.is-link { color: var(--accent); text-decoration: none; display: block; }
.text.is-link:hover { text-decoration: underline; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.qr {
  width: 168px; flex: none;
  text-align: center;
}
.qr svg, .qr img {
  width: 168px; height: 168px; display: block;
  border-radius: 8px; border: 1px solid var(--line); background: #fff;
}
.qr .qr-note { font-size: 11.5px; color: var(--muted); margin-top: 6px; line-height: 1.4; }

.hint {
  color: var(--muted); font-size: 13.5px; margin: 0;
}

.err-box {
  padding: 12px 14px; border-radius: 10px;
  background: color-mix(in srgb, var(--err) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--err) 30%, transparent);
  color: var(--err); font-size: 14px;
}

/* ---------- 说明 ---------- */
.tips { margin: 42px 0 12px; }
.tips h2 { font-size: 18px; margin: 0 0 14px; }
.tip-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.tip {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px;
}
.tip h3 { margin: 0 0 6px; font-size: 14.5px; color: var(--accent); }
.tip p { margin: 0; color: var(--muted); font-size: 13.5px; }

.foot {
  padding: 30px 20px 44px; color: var(--muted);
  font-size: 13px; text-align: center;
}
.foot p { margin: 4px 0; }
.foot a { color: var(--accent); text-decoration: none; }
.foot a:hover { text-decoration: underline; }
.muted { color: var(--muted); }

@media (max-width: 620px) {
  .hero { padding: 40px 0 28px; }
  .result { grid-template-columns: 1fr; }
  .qr { width: 100%; }
  .qr svg, .qr img { width: 100%; max-width: 220px; height: auto; margin: 0 auto; }
}