:root {
  --bg: #f6f7fb;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --border: #e6e8ef;
  --text: #1c2130;
  --text-soft: #5b6478;
  --muted: #8b93a7;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --accent-hover: #4338ca;
  --success: #16a34a;
  --danger: #dc2626;
  --code-bg: #0f1222;
  --code-text: #e6e8f2;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.06);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f18;
    --bg-soft: #12141f;
    --card: #161926;
    --border: #262a3a;
    --text: #e9ebf4;
    --text-soft: #b3b9cc;
    --muted: #808aa3;
    --accent: #7c83ff;
    --accent-soft: #1b1f3a;
    --accent-hover: #969bff;
    --code-bg: #0a0c16;
    --code-text: #e6e8f2;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg-soft) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}
.brand:hover {
  text-decoration: none;
}
.brand .logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
}
.nav {
  display: flex;
  gap: 6px;
}
.nav a {
  color: var(--text-soft);
  padding: 7px 12px;
  border-radius: 9px;
  font-size: 0.92rem;
  transition: background 0.15s, color 0.15s;
}
.nav a:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}
.nav a.active {
  color: var(--accent);
  background: var(--accent-soft);
}

/* ---------- Layout ---------- */
main {
  padding: 40px 0 64px;
}
.page-title {
  font-size: 1.7rem;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}
.page-sub {
  color: var(--text-soft);
  margin: 0 0 28px;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 56px 0 12px;
}
.hero h1 {
  font-size: 2.3rem;
  margin: 0 0 12px;
  letter-spacing: -0.03em;
}
.hero p {
  color: var(--text-soft);
  font-size: 1.05rem;
  max-width: 620px;
  margin: 0 auto;
}

/* ---------- Cards grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 36px;
}
.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.tool-card:hover {
  text-decoration: none;
  transform: translateY(-3px);
  border-color: var(--accent);
}
.tool-card .icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--accent-soft);
  font-size: 22px;
  margin-bottom: 14px;
}
.tool-card h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
  color: var(--text);
}
.tool-card p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.92rem;
}

/* ---------- Panels / forms ---------- */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.panel h2 {
  margin: 0 0 16px;
  font-size: 1.15rem;
}
.field {
  margin-bottom: 16px;
}
.field > label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 6px;
}
.hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 5px;
}
input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}
textarea {
  resize: vertical;
  font-family: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.5;
}
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 620px) {
  .row {
    grid-template-columns: 1fr;
  }
}

.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.seg button {
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text-soft);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  font-family: inherit;
  transition: all 0.15s;
}
.seg button:hover {
  border-color: var(--accent);
}
.seg button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* 分组任务选择器 */
.task-groups {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.task-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.task-group-label {
  font-size: 0.78rem;
  color: var(--muted);
  min-width: 64px;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  font-family: inherit;
  transition: all 0.15s;
}
.btn:hover {
  border-color: var(--accent);
}
.btn-primary,
.btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover,
.btn.active:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-soft);
  cursor: pointer;
}
.checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

/* ---------- Command output ---------- */
.output {
  position: relative;
}
.output pre {
  margin: 0;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 18px 18px;
  border-radius: 12px;
  overflow-x: auto;
  font-family: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-left: 8px;
  vertical-align: middle;
}

.status {
  font-size: 0.88rem;
  margin-top: 10px;
  min-height: 1.2em;
}
.status.ok {
  color: var(--success);
}
.status.err {
  color: var(--danger);
}

.dynamic-list .file-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.dynamic-list .file-row input {
  flex: 1;
}
.icon-btn {
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text-soft);
  width: 40px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.1rem;
}
.icon-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- JSON tool ---------- */
.json-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
}
@media (max-width: 860px) {
  .json-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}
.json-pane {
  min-width: 0;
}
.json-pane textarea {
  min-height: 460px;
}
.json-output {
  min-height: 460px;
  max-height: 640px;
  overflow: auto;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 12px;
  padding: 16px;
  font-family: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
}
.tok-key { color: #79c0ff; }
.tok-string { color: #7ee787; }
.tok-number { color: #ffab70; }
.tok-boolean { color: #ff7b72; }
.tok-null { color: #ff7b72; }
.tok-punc { color: #b3b9cc; }

/* 解析错误提示 */
.json-error {
  margin: 0;
  color: #ff9a9a;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
  font-size: 0.9rem;
  line-height: 1.6;
}

/* 树形视图 */
.json-output.tree {
  white-space: normal;
}
.jt-line {
  white-space: pre-wrap;
  word-break: break-word;
}
.jt-children {
  margin-left: 1.4em;
  border-left: 1px dashed rgba(179, 185, 204, 0.18);
}
.jt-header {
  cursor: pointer;
  border-radius: 4px;
}
.jt-header:hover {
  background: rgba(255, 255, 255, 0.05);
}
.jt-toggle {
  display: inline-block;
  width: 1.1em;
  color: var(--muted);
  user-select: none;
}
.jt-toggle::before {
  content: "▾";
}
.jt-node.collapsed > .jt-header .jt-toggle::before {
  content: "▸";
}
.jt-node.collapsed > .jt-children,
.jt-node.collapsed > .jt-closer,
.jt-node.collapsed > .jt-header .jt-open {
  display: none;
}
.jt-node:not(.collapsed) > .jt-header .jt-summary {
  display: none;
}
.jt-summary {
  color: #808aa3;
  font-style: italic;
}
.jt-key { color: #79c0ff; }
.jt-string { color: #7ee787; }
.jt-number { color: #ffab70; }
.jt-boolean { color: #ff7b72; }
.jt-null { color: #ff7b72; }
.jt-punc { color: #b3b9cc; }