/* 二维码生成器 —— 与仓库其它静态站保持同一套克制的浅色/深色风格 */
*, *::before, *::after { box-sizing: border-box; }

:root {
  color-scheme: light dark;
  --bg: #f6f6f3;
  --card: #ffffff;
  --soft: #f1f1ee;
  --field: #fcfcfb;
  --fg: #17181a;
  --muted: #6b6f6c;
  --faint: #9a9d99;
  --line: #e3e3de;
  --line-strong: #c9cbc5;
  --accent: #1f5fd0;
  --primary: #17181a;
  --on-primary: #ffffff;
  --danger: #b42318;
  --danger-bg: #fff3f1;
  --danger-line: #ffd5cf;
  --warn: #8a5300;
  --warn-bg: #fff8e8;
  --warn-line: #f5e2b8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131413;
    --card: #1b1c1b;
    --soft: #202220;
    --field: #202220;
    --fg: #ececea;
    --muted: #9ea19d;
    --faint: #7c807c;
    --line: #2c2f2c;
    --line-strong: #41453f;
    --accent: #8fb0ff;
    --primary: #ececea;
    --on-primary: #161715;
    --danger: #ff9b90;
    --danger-bg: #351d1b;
    --danger-line: #5a2b26;
    --warn: #e8bd72;
    --warn-bg: #332a17;
    --warn-line: #4d3f22;
  }
}

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.masthead { padding: 34px 0 18px; }
.masthead-inner { max-width: 1080px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--primary); color: var(--on-primary);
  flex: none;
}
.brand h1 { font-size: 21px; font-weight: 650; margin: 0; letter-spacing: -0.01em; }
.tagline { margin: 8px 0 0; color: var(--muted); font-size: 13.5px; max-width: 620px; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 18px;
  align-items: start;
  padding-top: 8px;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
}

.input-panel { display: flex; flex-direction: column; gap: 14px; }
.preview-panel { position: sticky; top: 20px; }

/* ---------- 模式切换 ---------- */
.tabs {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  align-self: flex-start;
}
.tabs [role="tab"] {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 13.5px;
  padding: 6px 18px;
  border-radius: 7px;
  cursor: pointer;
}
.tabs [role="tab"][aria-selected="true"] {
  background: var(--card);
  color: var(--fg);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.09);
}
.tabs [role="tab"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ---------- 表单 ---------- */
.label {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 7px;
}
.label-note { font-size: 12px; font-weight: 400; color: var(--muted); }

textarea {
  display: block;
  width: 100%;
  min-height: 96px;
  resize: vertical;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--field);
  color: var(--fg);
  font: 13.5px/1.6 ui-monospace, SFMono-Regular, "Cascadia Mono", Menlo, Consolas, monospace;
  word-break: break-all;
}
textarea:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}
textarea::placeholder { color: var(--faint); }

.meta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 12px;
  margin-top: 7px;
  font-size: 12px;
  color: var(--muted);
}
.usage { font-variant-numeric: tabular-nums; }
.usage.over { color: var(--danger); font-weight: 600; }
.usage-note { color: var(--faint); }

.link {
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: 12px;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.error,
.warn {
  margin: 8px 0 0;
  padding: 9px 11px;
  border-radius: 8px;
  font-size: 12.5px;
  line-height: 1.55;
}
.error {
  color: var(--danger);
  background: var(--danger-bg);
  border: 1px solid var(--danger-line);
}
.warn {
  color: var(--warn);
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
}
.hint { margin: 6px 0 0; font-size: 12px; color: var(--muted); }
.hint.bad { color: var(--danger); }

/* ---------- 样式设置 ---------- */
.options { border: 0; padding: 0; margin: 2px 0 0; }
.options legend {
  padding: 0;
  margin-bottom: 9px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.field-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 10px;
}
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field > span { font-size: 12px; color: var(--muted); }

input[type="number"],
select {
  width: 100%;
  height: 38px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  color: var(--fg);
  font: inherit;
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
}
input[type="color"] {
  width: 100%;
  height: 38px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 5px; }
input[type="color"]::-moz-color-swatch { border: 0; border-radius: 5px; }

.logo-actions { display: flex; align-items: center; gap: 6px; height: 38px; }
.btn-file {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}
.btn-file:hover { border-color: var(--line-strong); }
.btn-plain {
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
.btn-plain:hover { color: var(--fg); border-color: var(--line-strong); }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 预览 ---------- */
.view-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}
.view-head h2 { margin: 0; font-size: 14px; font-weight: 650; }
.version {
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.preview-box {
  display: grid;
  place-items: center;
  min-height: 260px;
  padding: 18px;
  background:
    linear-gradient(45deg, var(--soft) 25%, transparent 25%, transparent 75%, var(--soft) 75%) 0 0 / 16px 16px,
    linear-gradient(45deg, var(--soft) 25%, transparent 25%, transparent 75%, var(--soft) 75%) 8px 8px / 16px 16px,
    var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
#preview {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 340px;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.09);
}
#preview[hidden] { display: none; }
.empty {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  max-width: 260px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--card);
  color: var(--fg);
  font: inherit;
  font-size: 13.5px;
  cursor: pointer;
  transition: border-color 0.12s, background-color 0.12s, opacity 0.12s;
}
.btn:hover:not(:disabled) { border-color: var(--line-strong); background: var(--soft); }
.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
  font-weight: 600;
}
.btn.primary:hover:not(:disabled) { background: var(--primary); opacity: 0.88; }
.btn:disabled { opacity: 0.42; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- 批量 ---------- */
.batch-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.batch-toolbar .hint { margin: 0; }
.batch-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  max-height: 440px;
  overflow: auto;
  border-top: 1px solid var(--line);
}
.batch-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}
.batch-item:last-child { border-bottom: 0; }
.thumb {
  display: block;
  width: 52px;
  height: 52px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.thumb-bad {
  display: grid;
  place-items: center;
  background: var(--danger-bg);
  border-color: var(--danger-line);
  color: var(--danger);
  font-size: 11px;
}
.batch-meta { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.batch-idx {
  flex: none;
  font: 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}
.batch-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12.5px;
  color: var(--fg);
}
.btn-sm {
  height: 28px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--card);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}
.btn-sm:hover:not(:disabled) { color: var(--fg); border-color: var(--line-strong); }
.btn-sm:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- 页脚 ---------- */
.footer {
  margin-top: 26px;
  padding-bottom: 44px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}
.footer p { margin: 3px 0; }
.footer a { color: var(--accent); text-underline-offset: 2px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .preview-panel { position: static; }
  .preview-box { min-height: 220px; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 14px; }
  .masthead { padding-top: 24px; }
  .panel { padding: 16px; border-radius: 12px; }
  .field-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field-grid .field:last-child { grid-column: 1 / -1; }
  .actions .btn { flex: 1 1 auto; }
  .batch-list { max-height: 360px; }
}