/* config.json 解密器 — 浅色主题，无外部依赖 */
:root {
  --bg: #f5f6f8;
  --bg-grad: radial-gradient(1200px 480px at 12% -8%, #eef1ff 0%, rgba(245, 246, 248, 0) 62%);
  --card: #ffffff;
  --ink: #17181c;
  --ink-2: #43474f;
  --ink-3: #6b7280;
  --line: #e3e5ea;
  --line-strong: #d2d6dd;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --accent-ink: #3a32c9;
  --ok: #0f7b4f;
  --ok-soft: #e7f6ee;
  --err: #b3261e;
  --err-soft: #fdeceb;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --r: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px -12px rgba(16, 24, 40, .12);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg-grad), var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(1020px, calc(100% - 40px)); margin: 0 auto; }

code {
  font-family: var(--mono);
  font-size: .88em;
  background: #f1f2f6;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: .08em .34em;
  color: var(--ink-2);
}

/* ---------- hero ---------- */
.hero { padding: 56px 0 30px; }

.brand { display: flex; align-items: center; gap: 14px; }

.logo {
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 12px;
  background: linear-gradient(150deg, #6366f1, #4338ca);
  color: #fff;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -.5px;
  box-shadow: 0 6px 16px -6px rgba(79, 70, 229, .55);
  flex: none;
}

h1 {
  margin: 0;
  font-size: 27px;
  letter-spacing: -.4px;
  line-height: 1.2;
  font-weight: 650;
}

.sub { margin: 3px 0 0; color: var(--ink-3); font-size: 13.5px; }

.lede {
  margin: 22px 0 0;
  color: var(--ink-2);
  font-size: 15px;
  max-width: 68ch;
}

.lede strong { color: var(--ink); }

.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

.pill {
  font-size: 12.5px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  border: 1px solid #dfe2ff;
  border-radius: 999px;
  padding: 4px 11px;
}

/* ---------- tabs ---------- */
.tabs {
  display: flex;
  gap: 4px;
  margin: 26px 0 16px;
  border-bottom: 1px solid var(--line);
}

.tab {
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 10px 14px 12px;
  margin-bottom: -1px;
  font: inherit;
  font-size: 14.5px;
  color: var(--ink-3);
  cursor: pointer;
  border-radius: 6px 6px 0 0;
  transition: color .15s, background .15s;
}

.tab:hover { color: var(--ink); background: rgba(79, 70, 229, .05); }
.tab.is-active { color: var(--accent-ink); border-bottom-color: var(--accent); font-weight: 600; }
.tab:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.panel { display: none; }
.panel.is-active { display: block; animation: fade .18s ease-out; }

@keyframes fade { from { opacity: 0; transform: translateY(3px); } to { opacity: 1; transform: none; } }

/* ---------- card ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

/* ---------- dropzone ---------- */
.dropzone {
  border: 1.5px dashed var(--line-strong);
  border-radius: 12px;
  background: #fbfbfd;
  padding: 30px 20px;
  text-align: center;
  color: var(--ink-3);
  cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
}

.dropzone:hover, .dropzone:focus-visible {
  border-color: #b9bdf5;
  background: #f8f8ff;
  color: var(--accent-ink);
  outline: none;
}

.dropzone.is-over {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.dropzone svg { color: var(--accent); opacity: .85; }
.dz-title { margin: 10px 0 2px; font-size: 15px; font-weight: 600; color: var(--ink); }
.dz-hint { margin: 0; font-size: 12.5px; color: var(--ink-3); }

/* ---------- form ---------- */
.field { display: block; margin-top: 16px; }

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 6px;
}

.field-label em {
  font-style: normal;
  font-weight: 400;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  margin-left: 6px;
}

.field-hint { display: block; margin-top: 5px; font-size: 12px; color: var(--ink-3); }

input[type="text"], textarea {
  width: 100%;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  padding: 9px 11px;
  transition: border-color .15s, box-shadow .15s;
}

textarea { resize: vertical; line-height: 1.55; }

input[type="text"]:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}

.check {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--ink-2);
  cursor: pointer;
}

.check input { margin-top: 3px; accent-color: var(--accent); flex: none; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

.advanced {
  margin-top: 16px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.advanced summary {
  cursor: pointer;
  font-size: 13.5px;
  color: var(--ink-2);
  font-weight: 600;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before {
  content: "";
  width: 6px; height: 6px;
  border-right: 1.6px solid var(--ink-3);
  border-bottom: 1.6px solid var(--ink-3);
  transform: rotate(-45deg);
  transition: transform .15s;
  margin-right: 2px;
}
.advanced[open] summary::before { transform: rotate(45deg); }

/* ---------- buttons ---------- */
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

.btn {
  appearance: none;
  display: inline-block;
  text-decoration: none;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 9px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--ink-2);
  cursor: pointer;
  transition: transform .06s, box-shadow .15s, background .15s, border-color .15s;
}

.btn:hover { background: #fafafc; border-color: var(--line-strong); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(180deg, #5b52ea, #463ede);
  border-color: #4338ca;
  color: #fff;
  box-shadow: 0 1px 2px rgba(67, 56, 202, .3), 0 8px 18px -10px rgba(67, 56, 202, .7);
}

.btn-primary:hover { background: linear-gradient(180deg, #6459f0, #4b42e6); }

.btn-ghost { background: transparent; }
.btn-small { padding: 6px 12px; font-size: 13px; }

/* ---------- alert ---------- */
.alert {
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 13.5px;
  background: var(--err-soft);
  border: 1px solid #f6c9c5;
  color: var(--err);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- result ---------- */
.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.result-head h2 { margin: 0; font-size: 16px; font-weight: 650; }
.result-actions { display: flex; gap: 8px; }

.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }

.chip {
  font-size: 12px;
  font-family: var(--mono);
  color: var(--ink-2);
  background: #f4f5f8;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 4px 9px;
}

.chip.ok { color: var(--ok); background: var(--ok-soft); border-color: #c6e9d8; }
.chip.bad { color: var(--err); background: var(--err-soft); border-color: #f6c9c5; }

.code {
  margin: 0;
  max-height: 460px;
  overflow: auto;
  background: #fbfbfd;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  font-family: var(--mono);
  font-size: 12.6px;
  line-height: 1.62;
  color: #1f2430;
  tab-size: 2;
  white-space: pre;
}

.code::selection { background: #dcdcff; }

.sf-out {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--ok-soft);
  border: 1px solid #c6e9d8;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ok);
  word-break: break-all;
}

.sub-h {
  margin: 22px 0 10px;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--ink-2);
}

.presets { display: flex; flex-wrap: wrap; gap: 8px; }

.preset {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fafafc;
  color: var(--ink-2);
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}

.preset:hover { background: var(--accent-soft); border-color: #dfe2ff; color: var(--accent-ink); }

/* ---------- explain ---------- */
.explain h2 { margin: 0 0 14px; font-size: 16px; font-weight: 650; }

.chain {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0 0 16px;
  display: grid;
  gap: 8px;
}

.chain li {
  counter-increment: step;
  position: relative;
  padding: 10px 14px 10px 44px;
  background: #fafafc;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 13.5px;
}

.chain li::before {
  content: counter(step);
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 21px; height: 21px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 11.5px;
  font-weight: 700;
}

.chain b { display: block; font-weight: 600; }
.chain span { color: var(--ink-3); font-size: 12.5px; font-family: var(--mono); }

.note { margin: 0; font-size: 13.5px; color: var(--ink-2); }
.note.dim { margin-top: 12px; color: var(--ink-3); font-size: 12.5px; }

/* ---------- footer ---------- */
.foot {
  margin-top: 34px;
  padding: 20px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 12.5px;
}

.foot .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 12px);
  background: #17181c;
  color: #fff;
  font-size: 13px;
  padding: 9px 16px;
  border-radius: 9px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s, transform .18s;
  z-index: 50;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 720px) {
  .hero { padding: 36px 0 22px; }
  h1 { font-size: 22px; }
  .grid2 { grid-template-columns: 1fr; }
  .card { padding: 16px; }
  .wrap { width: calc(100% - 28px); }
}