/*
 * base.css
 * --------
 * Foundation: CSS variables, resets, layout, header, sidebar,
 * status bar, toast, scrollbar, responsive.
 * 
 * Design Tokens from reflct.co DESIGN.md
 */

:root {
  /* ── Colors ── */
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #4b5563;
  --color-text-tertiary: #a3a3a3;
  --color-text-inverse: #eae8e3;
  --color-surface-base: #000000;
  --color-surface-muted: #ffffff;
  --color-surface-raised: #f5f2ee;
  --color-surface-strong: #4a7c59;
  --color-border-default: #e5e7eb;
  --color-border-strong: #121212;

  /* Legacy aliases (for compatibility) */
  --color-primary: #1a1a1a;
  --color-secondary: #4b5563;
  --color-tertiary: #a3a3a3;
  --color-accent: #4a7c59;
  --color-accent-hover: #3d6348;
  --color-accent-light: rgba(74, 124, 89, 0.08);
  --color-bg: #f5f2ee;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-border-light: #f0f0f0;

  /* ── Typography ── */
  --font-size-xs: 10px;
  --font-size-sm: 12px;
  --font-size-md: 14px;
  --font-size-lg: 15px;
  --font-size-xl: 16px;
  --font-size-2xl: 18px;
  --font-size-3xl: 19px;
  --font-size-4xl: 20px;

  /* ── Spacing ── */
  --space-1: 4px;
  --space-2: 6px;
  --space-3: 8px;
  --space-4: 10px;
  --space-5: 12px;
  --space-6: 16px;
  --space-7: 20px;
  --space-8: 24px;

  /* Legacy spacing aliases */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* ── Radius ── */
  --radius-xs: 16px;
  --radius-sm: 20px;
  --radius-md: 24px;
  --radius-lg: 32px;
  --radius-xl: 40px;
  --radius-2xl: 9999px;

  /* Legacy radius aliases */
  --radius-sm: 5px;
  --radius-md: 8px;

  /* ── Shadows ── */
  --shadow-1: 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px;
  --shadow-2: 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.1) 0px 4px 6px -4px;
  --shadow-3: 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.1) 0px 2px 4px -2px;
  --shadow-4: 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.16) 0px 30px 70px -24px;

  /* Legacy shadow aliases */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 2px 8px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.12);

  /* ── Motion ── */
  --motion-instant: 150ms;
  --motion-fast: 200ms;
  --motion-normal: 300ms;
  --motion-slow: 500ms;
  --motion-slower: 700ms;

  /* Legacy transition aliases */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  /* ── Layout ── */
  --header-height: 46px;
  --status-bar-height: 26px;
  --sidebar-width: 280px;
  --side-panel-width: 380px;

  /* ── Fonts ── */
  --font-sans: -apple-system, "Noto Sans SC", BlinkMacSystemFont, "SF Pro Display", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Menlo", "Monaco", "Cascadia Code", "Consolas", monospace;

  /* ── Preview ── */
  --preview-width-mobile: 375px;
  --preview-width-desktop: 720px;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-surface-raised);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

.lucide {
  display: block;
  width: 1em;
  height: 1em;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  flex-shrink: 0;
}

.sidebar-toggle .lucide,
.github-link .lucide,
.settings-panel-close .lucide {
  width: 18px;
  height: 18px;
}

/* ══════════════════════════════════════════════════════════════
   App root: vertical flex — header / main / status-bar
   ══════════════════════════════════════════════════════════════ */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 100%;
  width:100%;
  margin: 0 auto;
  background: var(--color-surface);
}

/* ── Header ── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-md);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--color-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
  background: var(--color-bg);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.sidebar-toggle:active { transform: translateY(0); }

.logo {
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 7px;
}
.logo img{
  border-radius: 48px;
  width:32px;
  height:32px;
  display:inline-block;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.header-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.header-nav-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.header-nav-btn:hover { color: var(--color-primary); background: var(--color-bg); transform: translateY(-1px); }
.header-nav-btn.active { color: var(--color-accent); background: var(--color-accent-light); }
.header-nav-btn:active { transform: translateY(0); }

.header-divider {
  width: 1px;
  height: 14px;
  background: var(--color-border);
}

.creator-info {
  font-size: 14px;
  color: var(--color-tertiary);
  white-space: nowrap;
  font-weight:500;
}
.creator-info a { color: var(--color-accent); text-decoration: none; }
.creator-info a:hover { opacity: .7; }

.github-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  color: var(--color-tertiary);
  transition: all var(--transition-fast);
  text-decoration: none;
}
.github-link:hover { background: var(--color-bg); color: var(--color-primary); transform: translateY(-1px); }
.github-link:active { transform: translateY(0); }

/* ══════════════════════════════════════════════════════════════
   Main area: horizontal flex — sidebar? + editor + preview (+ right-panel)
   ══════════════════════════════════════════════════════════════ */
.main-area {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
  position: relative;
}

/* Resize Handle */
.resize-handle {
  width: 4px;
  background: transparent;
  cursor: col-resize;
  flex-shrink: 0;
  transition: background var(--transition-fast);
  position: relative;
}

.resize-handle:hover,
.resize-handle.dragging {
  background: var(--color-accent);
}

.resize-handle::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: -4px;
  right: -4px;
}

/* Editor Panel */
.editor-panel {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--color-border);
  overflow: hidden;
  min-height: 0;
  flex: 1;
  min-width: 200px;
  max-width: 60%;
}

/* Preview Panel */
.preview-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
  flex: 1;
  min-width: 300px;
  position: relative;
}

/* Right Panel (Theme/Code) */
.right-panel {
  width: var(--side-panel-width);
  min-width: 280px;
  max-width: 500px;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}

.right-panel-tabs {
  display: flex;
  align-items: center;
  padding: 0 var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
  gap: 2px;
}

.right-panel-tab {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--color-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.right-panel-tab:hover {
  color: var(--color-primary);
}

.right-panel-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.right-panel-close {
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--color-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.right-panel-close:hover {
  background: var(--color-bg);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.right-panel-close:active { transform: translateY(0); }

.right-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md) var(--space-lg);
}

.right-panel-body::-webkit-scrollbar { width: 4px; }
.right-panel-body::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }

/* Right panel slide transition */
.right-panel-slide-enter-active,
.right-panel-slide-leave-active {
  transition: width var(--transition-normal), opacity var(--transition-normal);
  overflow: hidden;
}

.right-panel-slide-enter-from,
.right-panel-slide-leave-to {
  width: 0;
  opacity: 0;
}

/* Settings Overlay (覆盖形式) */
.settings-overlay {
  position: fixed;
  top: var(--header-height);
  right: 0;
  bottom: var(--status-bar-height);
  width: var(--side-panel-width);
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: -4px 0 16px rgba(0, 0, 0, 0.06);
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.settings-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.settings-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.settings-panel-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.settings-panel-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--color-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.settings-panel-close:hover {
  background: var(--color-bg);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.settings-panel-close:active { transform: translateY(0); }

.settings-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md) var(--space-lg);
}

/* ── Left Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar-section { padding: var(--space-sm) var(--space-md); }
.sidebar-section + .sidebar-section { border-top: 1px solid var(--color-light-border); }

.sidebar-section-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--color-tertiary);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: var(--space-sm);
}

.sidebar-action-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  width: 100%;
  padding: 8px 8px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--color-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}
.sidebar-action-btn:hover { background: var(--color-bg); color: var(--color-primary); transform: translateY(-1px); }
.sidebar-action-btn.primary { background: var(--color-accent); color: white; font-weight: 500; }
.sidebar-action-btn.primary:hover { background: var(--color-accent-hover); }
.sidebar-action-btn:active { transform: translateY(0); }
.sidebar-action-btn svg { flex-shrink: 0; }

.sidebar-search-input {
  width: 100%;
  margin-bottom: var(--space-sm);
  padding: 7px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: var(--color-bg);
  color: var(--color-primary);
}

.sidebar-search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
}

.sidebar-doc-list { display: flex; flex-direction: column; gap: 2px; }

.sidebar-doc-item {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.sidebar-doc-item:hover { background: var(--color-bg); color: var(--color-primary); }
.sidebar-doc-item.active { background: var(--color-accent-light); color: var(--color-accent); font-weight: 500; }
.sidebar-doc-item svg { flex-shrink: 0; margin-top: 2px; }

.sidebar-doc-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 2px;
  flex: 1;
}

.sidebar-doc-title {
  font-size: 14px;
  line-height: 1.4;
  color: inherit;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-doc-title-row {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.sidebar-doc-dirty {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3d6b4a;
  flex-shrink: 0;
}

.sidebar-doc-time {
  font-size: 11px;
  line-height: 1.3;
  color: var(--color-text-tertiary);
  opacity: 0.7;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-doc-item.active .sidebar-doc-time {
  color: var(--color-accent);
  opacity: 0.6;
}

.sidebar-doc-actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.sidebar-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--color-light-border);
  background: var(--color-surface);
  color:var(--color-text-tertiary);
  border-radius: 4px;
  line-height: 1;
  padding: 0;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-icon-btn svg {
  width: 14px;
  height: 14px;
}

.sidebar-icon-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-border);
  transform: translateY(-1px);
}

.sidebar-icon-btn.danger {
  color: var(--color-text-tertiary);
}

.sidebar-icon-btn.danger:hover {
  color: #df6b6b;
}

.sidebar-icon-btn:active { transform: translateY(0); }

/* Sidebar slide transition */
.sidebar-enter-active, .sidebar-leave-active {
  transition: width var(--transition-normal), opacity var(--transition-normal);
  overflow: hidden;
}
.sidebar-enter-from, .sidebar-leave-to { width: 0 !important; opacity: 0; }

/* ── Status Bar ── */
.status-bar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-md);
  height: var(--status-bar-height);
  padding: 0 var(--space-md);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 11px;
  color: var(--color-tertiary);
  flex-shrink: 0;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.status-right {
  justify-content: flex-start;
}

.status-item { display: flex; align-items: center; gap: 4px; white-space: nowrap; }
.status-saved, .status-saved svg { color: #3d6b4a; }
.status-saving { color: #3d6b4a; }
.status-error { color: #df6b6b; }

/* ── Toast ── */
.toast-container { position: fixed; bottom: var(--space-lg); right: var(--space-lg); z-index: 2000; }

.toast {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: toastIn .2s ease-out;
}
.toast-success { background: #3d6b4a; color: white; }
.toast-error   { background: #df6b6b; color: white; }

@keyframes toastIn {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.toast-fade-enter-active, .toast-fade-leave-active { transition: opacity .15s ease; }
.toast-fade-enter-from, .toast-fade-leave-to { opacity: 0; }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3000;
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-4);
  width: 90%;
  max-width: 360px;
  overflow: hidden;
}

.modal-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border-default);
}

.modal-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.modal-body {
  padding: var(--space-6);
}

.modal-body p {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-2) 0;
}

.modal-warning {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-surface-raised);
}

.modal-btn {
  padding: var(--space-2) var(--space-5);
  font-size: var(--font-size-md);
  font-weight: 500;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--motion-instant);
  border: none;
}

.modal-btn-cancel {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-default);
}

.modal-btn-cancel:hover {
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
}

.modal-btn-danger {
  background: #df6b6b;
  color: white;
}

.modal-btn-danger:hover {
  background: #B71C1C;
  transform: translateY(-1px);
}

.modal-fade-enter-active, .modal-fade-leave-active {
  transition: opacity var(--motion-fast);
}

.modal-fade-enter-from, .modal-fade-leave-to {
  opacity: 0;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-tertiary); }

/* ══════════════════════════════════════════════════════════════
   Responsive
   ══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .header { padding: 0 var(--space-sm); }
  .logo span { display: none; }
  .creator-info { display: none; }
  .header-nav-btn span { display: none; }

  .sidebar {
    position: absolute;
    left: 0; top: var(--header-height);
    height: calc(100vh - var(--header-height) - var(--status-bar-height));
    z-index: 200;
    box-shadow: var(--shadow-lg);
  }

  .main-area {
    flex-direction: column;
  }

  .editor-panel {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    flex: none;
    height: 40%;
    width: 100% !important;
  }

  .resize-handle[data-handle="editor-preview"] {
    display: none;
  }

  .preview-panel {
    flex: 1;
    width: 100% !important;
  }

  .resize-handle[data-handle="preview-right"] {
    display: none;
  }

  .right-panel {
    width: 100% !important;
    max-width: none;
  }

  .settings-overlay {
    width: 100%;
    max-width: none;
  }

  .status-bar { padding: 0 var(--space-sm); }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .right-panel { width: 340px !important; max-width: 340px; }
}