/* ── CSS Custom Properties ──────────────────────────────────────────── */
:root {
  --bg-primary: #0C0C0C;
  --bg-secondary: #141414;
  --bg-tertiary: #1A1A1A;
  --bg-hover: #222222;
  --bg-active: #333333;
  --border: #444444;
  --border-light: #333333;
  --text-primary: #F2F2F2;
  --text-secondary: #CCCCCC;
  --text-muted: #888888;
  --accent: #D77757;
  --accent-hover: #E08B6D;
  --accent-subtle: rgba(215, 119, 87, 0.15);
  --success: #5FCC68;
  --success-subtle: rgba(95, 204, 104, 0.15);
  --warning: #D4A843;
  --warning-subtle: rgba(212, 168, 67, 0.15);
  --danger: #E05252;
  --danger-subtle: rgba(224, 82, 82, 0.15);
  --font-mono: "SF Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --radius: 8px;
  --radius-sm: 4px;
  --transition: 150ms ease;
}

/* ── Reset & Base ──────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-tertiary);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  font-size: inherit;
}

/* ── Container ─────────────────────────────────────────────────────── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Header ────────────────────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}

.site-header .container {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: 16px;
}

.about {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 8px;
  line-height: 1.5;
}

.github-link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 4px;
}
.github-link:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
  text-decoration: none;
}

/* ── Presets Bar ───────────────────────────────────────────────────── */
.presets-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 0;
  flex-wrap: wrap;
}

.presets-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
}

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

.preset-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

.preset-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

.preset-btn-reset {
  margin-left: auto;
  border-style: dashed;
}

.preset-btn-reset:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
  background: var(--bg-hover);
}

.preset-btn-reset.active {
  border-color: var(--text-muted);
  color: var(--text-primary);
  background: var(--bg-hover);
  border-style: dashed;
}

.preset-icon {
  font-size: 0.9rem;
}

/* ── Panels ────────────────────────────────────────────────────────── */
.panels {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 14px 20px;
  background: var(--bg-secondary);
  gap: 16px;
  transition: background var(--transition);
  cursor: pointer;
  user-select: none;
}

.panel-header:hover {
  background: var(--bg-hover);
}

.panel-header:active {
  background: var(--accent-subtle);
}

.panel-header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.panel-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.panel-title {
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.panel-count {
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-subtle);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
  white-space: nowrap;
}

.panel-desc {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.panel-chevron {
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
  color: var(--text-muted);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.panel-header:hover .panel-chevron {
  color: var(--text-primary);
}

.panel-header:active .panel-chevron {
  color: var(--accent);
}

.panel-header[aria-expanded="false"] .panel-chevron {
  transform: rotate(-90deg);
}

.panel-body {
  padding: 12px 20px 20px;
  display: block;
}

.panel-header[aria-expanded="false"] + .panel-body {
  display: none;
}

.panel-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.select-all-btn,
.select-none-btn {
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.select-all-btn:hover,
.select-none-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-subtle);
}

/* ── Subcategory ───────────────────────────────────────────────────── */
.subcategory {
  margin-top: 16px;
}

.subcategory:first-of-type {
  margin-top: 0;
}

.subcategory-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-light);
}

.panel-help {
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.5;
  margin-bottom: 12px;
}

.subcategory-help {
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.5;
  margin-bottom: 10px;
}

/* ── Toggle Items ──────────────────────────────────────────────────── */
.toggle-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toggle-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.toggle-item:hover {
  background: var(--bg-hover);
}

.toggle-switch {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--bg-active);
  border-radius: 10px;
  transition: background var(--transition);
  cursor: pointer;
}

.toggle-track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: all var(--transition);
}

.toggle-switch input:checked + .toggle-track {
  background: var(--accent);
}

.toggle-switch input:checked + .toggle-track::after {
  transform: translateX(16px);
  background: #fff;
}

.toggle-switch input:focus-visible + .toggle-track {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.toggle-info {
  flex: 1;
  min-width: 0;
}

.toggle-label {
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline;
}

.toggle-category {
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 8px;
  vertical-align: middle;
}

.toggle-desc {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 2px;
}

.toggle-preview-btn {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  padding: 0;
  transition: color var(--transition);
}

.toggle-preview-btn:hover {
  color: var(--accent);
}

.toggle-preview {
  margin-top: 8px;
  padding: 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 300px;
  overflow-y: auto;
  display: none;
}

.toggle-preview.expanded {
  display: block;
}

/* ── Warnings ──────────────────────────────────────────────────────── */
.panel-warnings:empty {
  display: none;
}

.panel-warnings {
  margin-top: 12px;
}

.warning-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  background: var(--warning-subtle);
  border: 1px solid rgba(210, 153, 34, 0.3);
  border-radius: var(--radius);
  margin-bottom: 8px;
  font-size: 0.85rem;
}

.warning-icon {
  flex-shrink: 0;
  color: var(--warning);
  font-size: 1rem;
  line-height: 1.4;
}

.warning-text {
  color: var(--text-primary);
}

.warning-text strong {
  color: var(--warning);
}

/* Security warnings (red tint) */
.warning-security {
  background: rgba(220, 80, 60, 0.08);
  border-color: rgba(220, 80, 60, 0.35);
}

.warning-security .warning-icon {
  color: #dc503c;
}

.warning-security .warning-text strong {
  color: #dc503c;
}

/* Caution warnings (orange tint) */
.warning-caution {
  background: rgba(215, 119, 87, 0.08);
  border-color: rgba(215, 119, 87, 0.35);
}

.warning-caution .warning-icon {
  color: var(--accent);
}

.warning-caution .warning-text strong {
  color: var(--accent);
}

/* ── Output Panel ──────────────────────────────────────────────────── */
.output-panel {
  margin-top: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.output-title {
  font-size: 1rem;
  font-weight: 600;
}

.output-tabs {
  display: flex;
  gap: 4px;
}

.output-tab {
  padding: 4px 12px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition);
}

.output-tab:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.output-tab.active {
  color: var(--accent);
  background: var(--accent-subtle);
}

.output-body {
  position: relative;
}

.output-content {
  display: none;
}

.output-content.active {
  display: block;
}

.code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-light);
}

.code-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.copy-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.copy-btn.copied {
  color: var(--success);
  border-color: var(--success);
}

.copy-label {}

.code-block {
  padding: 16px;
  margin: 0;
  background: var(--bg-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-secondary);
  overflow-x: auto;
  max-height: 500px;
  overflow-y: auto;
  white-space: pre;
  tab-size: 2;
}

/* ── Zip Download ──────────────────────────────────────────────────── */
.zip-download {
  padding: 40px 20px;
  text-align: center;
}

.zip-info {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.download-btn:hover {
  background: var(--accent-hover);
}

.zip-hint {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 16px;
}

.zip-hint code {
  color: var(--text-secondary);
}

/* ── Share Bar ─────────────────────────────────────────────────────── */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
}

.share-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.share-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.share-status {
  font-size: 0.8rem;
  color: var(--success);
}

/* ── Footer ────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  margin-top: 40px;
}

.site-footer .contribute {
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: center;
  margin-bottom: 12px;
}

.site-footer p {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
}

/* ── Empty State ───────────────────────────────────────────────────── */
.empty-state {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .site-header .container {
    flex-direction: column;
    gap: 12px;
  }

  .github-link {
    align-self: flex-start;
    margin-top: 0;
  }

  .presets-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .preset-btn-reset {
    margin-left: 0;
  }

  .panel-header {
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 10px;
  }

  .panel-header-left {
    flex-basis: 100%;
  }

  .panel-header-right {
    width: 100%;
    justify-content: flex-end;
  }

  .panel-body {
    padding: 12px 16px 16px;
  }

  .toggle-item {
    padding: 8px;
  }

  .output-header {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }

  .code-block {
    font-size: 0.7rem;
    padding: 12px;
  }
}

/* ── Scrollbar ─────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-active);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ── Selection ─────────────────────────────────────────────────────── */
::selection {
  background: var(--accent-subtle);
  color: var(--accent-hover);
}