:root {
  --bg: #f8f9fa;
  --surface: #ffffff;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --radius: 8px;
  --error: #dc2626;
  --success: #16a34a;
  --active-bg: #eff6ff;
  --input-bg: #f3f4f6;
  --btn-secondary-bg: #e5e7eb;
  --btn-secondary-hover: #d1d5db;
}

[data-theme="dark"] {
  --bg: #0d1117;
  --surface: #161b22;
  --text: #c9d1d9;
  --text-secondary: #8b949e;
  --primary: #58a6ff;
  --primary-hover: #79b8ff;
  --border: #30363d;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --error: #f85149;
  --success: #3fb950;
  --active-bg: #1c2333;
  --input-bg: #1c2128;
  --btn-secondary-bg: #21262d;
  --btn-secondary-hover: #30363d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.no-scroll {
  height: 100vh;
  overflow: hidden;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  height: 36px;
}

.logo {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  padding: 0 8px 0 0;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.tool-nav {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
}

.tool-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  transition: all 0.15s ease;
  line-height: 1.4;
}

.tool-nav a:hover,
.tool-nav a.active {
  color: var(--primary);
  background: var(--active-bg);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.search-trigger {
  background: transparent;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 3px 8px;
  border-radius: 6px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  font-size: 0.8rem;
}

.search-trigger:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--active-bg);
}

.search-trigger svg {
  width: 14px;
  height: 14px;
}

.search-shortcut {
  font-size: 0.7rem;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--bg);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  font-family: system-ui, sans-serif;
  line-height: 1.4;
}

.theme-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--primary);
  background: var(--active-bg);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-moon,
:root:not([data-theme]) .theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

/* ---- 搜索弹窗 ---- */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.4);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
}

.search-overlay.search-open {
  display: flex;
}

.search-dialog {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 420px;
  max-width: 90vw;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-bottom: 1px solid var(--border);
  gap: 10px;
}

.search-icon {
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.search-input-wrap input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 14px 0;
  font-size: 1rem;
  color: var(--text);
  outline: none;
}

.search-input-wrap input::placeholder {
  color: var(--text-secondary);
}

.search-close {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
  cursor: pointer;
  flex-shrink: 0;
}

.search-results {
  padding: 6px;
  max-height: 320px;
  overflow-y: auto;
}

.search-item {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  transition: background 0.1s ease;
}

.search-item:hover,
.search-item.selected {
  background: var(--active-bg);
  color: var(--primary);
}

.search-empty {
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.container {
  flex: 1;
  width: 100%;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.container.no-scroll {
  overflow: hidden;
  min-height: 0;
}

h1 {
  margin: 0 0 6px;
  font-size: 1.4rem;
}

.lead {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.tool-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-color: var(--primary);
}

.tool-card .icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.tool-card .name {
  font-weight: 600;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.form-row {
  margin-bottom: 16px;
}

label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 0.95rem;
}

textarea,
input[type='text'],
input[type='number'],
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--surface);
  color: var(--text);
}

textarea {
  min-height: 180px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    'Liberation Mono', monospace;
  line-height: 1.5;
}

input[type='text'],
input[type='number'] {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    'Liberation Mono', monospace;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

button {
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius);
  background: var(--primary);
  color: white;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover {
  background: var(--primary-hover);
}

button.secondary {
  background: var(--btn-secondary-bg);
  color: var(--text);
}

button.secondary:hover {
  background: var(--btn-secondary-hover);
}

button.small {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.result-box {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  min-height: 60px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    'Liberation Mono', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
}

.error {
  color: var(--error);
}

.success {
  color: var(--success);
}

.hint {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .two-col {
    grid-template-columns: 1fr;
  }

  .site-header {
    gap: 8px;
  }

  .tool-nav a {
    padding: 3px 8px;
    font-size: 0.75rem;
  }
}

/* ---- Toast 提示 ---- */
.toast-container {
  position: fixed;
  top: 48px;
  left: 0;
  width: 100%;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: auto;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.toast-show {
  opacity: 1;
  transform: scale(1);
}

.toast-hide {
  opacity: 0;
  transform: scale(0.9);
}

.toast-success {
  background: var(--success);
  color: #fff;
}

.toast-error {
  background: var(--error);
  color: #fff;
}

.toast-info {
  background: var(--primary);
  color: #fff;
}

.toast-warning {
  background: #f5a623;
  color: #fff;
}