/* ============================================
   VETA Blog — Scholarly Academic Style
   Dual-theme: dark (midnight study) / light (daytime paper)
   ============================================ */

/* --- DARK THEME (midnight study) --- */
[data-theme="dark"] {
  --bg: #1c1a18;
  --bg-card: #252220;
  --bg-terminal: #1e1c1a;
  --bg-editor: #1c1a18;
  --surface: #2a2724;
  --surface-hover: #312e2a;
  --border: #3a3530;
  --border-focus: #c0392b;
  --text-primary: #d6cfc3;
  --text-secondary: #a0988a;
  --text-muted: #6e6860;
  --accent: #c0392b;
  --accent-glow: rgba(192, 57, 43, 0.08);
  --green: #5a8a5a;
  --red: #c0392b;
  --yellow: #b8a060;
  --orange: #b87040;
  --purple: #7a6a9a;
  --cyan: #5a8088;
  --card-shadow: 0 1px 4px rgba(0,0,0,0.15);
  --card-border: #3a3530;
  --font-mono: "Sarasa Mono SC", "LXGW WenKai Mono", "Noto Sans Mono SC", "JetBrains Mono", "Cascadia Code", monospace;
  --font-sans: "Sarasa Mono SC", "LXGW WenKai Mono", "Noto Sans Mono SC", "JetBrains Mono", "Cascadia Code", monospace;
  --font-display: "Sarasa Mono SC", "LXGW WenKai Mono", "Noto Sans Mono SC", "JetBrains Mono", "Cascadia Code", monospace;
  --radius: 4px;
  --radius-sm: 2px;
  --transition: 0.2s ease;
}

/* --- LIGHT THEME (daytime paper) --- */
[data-theme="light"] {
  --bg: #faf8f4;
  --bg-card: #fefdfb;
  --bg-terminal: #f8f6f1;
  --bg-editor: #fefdfb;
  --surface: #f2efe9;
  --surface-hover: #e8e4dc;
  --border: #d0cbc3;
  --border-focus: #c0392b;
  --text-primary: #1a1a1a;
  --text-secondary: #555555;
  --text-muted: #888888;
  --accent: #c0392b;
  --accent-glow: rgba(192, 57, 43, 0.05);
  --green: #4a7a4a;
  --red: #c0392b;
  --yellow: #a09040;
  --orange: #a8603a;
  --purple: #6a5a8a;
  --cyan: #4a6a70;
  --card-shadow: 0 1px 4px rgba(0,0,0,0.04);
  --card-border: #d0cbc3;
  --font-mono: "Sarasa Mono SC", "LXGW WenKai Mono", "Noto Sans Mono SC", "JetBrains Mono", "Cascadia Code", monospace;
  --font-sans: "Sarasa Mono SC", "LXGW WenKai Mono", "Noto Sans Mono SC", "JetBrains Mono", "Cascadia Code", monospace;
  --font-display: "Sarasa Mono SC", "LXGW WenKai Mono", "Noto Sans Mono SC", "JetBrains Mono", "Cascadia Code", monospace;
  --radius: 4px;
  --radius-sm: 2px;
  --transition: 0.2s ease;
}

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

html {
  font-size: 14px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  font-weight: 300;
  line-height: 1.6;
  letter-spacing: -0.01em;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1;
  font-kerning: normal;
}

body {
  display: flex;
  flex-direction: column;
  position: relative;
}

/* --- CRT Scanline Overlay — disabled for academic style --- */
#crt-overlay {
  display: none;
}

/* --- App Layout --- */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

#main-content {
  flex: 1;
  position: relative;
  overflow: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

/* --- Panel Visibility --- */
.panel {
  width: 100%;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.panel.hidden {
  display: none;
}

/* ============================================
   VIEWER MODE — Card Display
   ============================================ */
.viewer-panel {
  padding: 48px 40px;
}

.card-container {
  max-width: 680px;
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 40px 36px;
  hyphens: auto;
  word-break: break-word;
  overflow-wrap: break-word;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
}

.card-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  opacity: 0.6;
}

.card-container::after {
  display: none;
}

.card-container h1 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-style: italic;
  letter-spacing: -0.02em;
}

.card-container h2 {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  font-style: italic;
}

.card-container h3 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 10px;
  padding-left: 0;
  border-left: none;
  font-variant: small-caps;
  letter-spacing: 0.04em;
}

.card-container h3::before {
  counter-increment: section;
  content: "§ ";
  color: var(--accent);
  font-weight: 400;
  margin-right: 0.3em;
}

.card-container p {
  color: var(--text-primary);
  line-height: 1.65;
  margin-bottom: 8px;
  font-size: 0.88rem;
  text-align: justify;
  hyphens: auto;
}

.card-container strong {
  color: var(--text-primary);
  font-weight: 700;
}

.card-container em {
  color: var(--text-secondary);
  font-style: italic;
}

.card-container ul, .card-container ol {
  margin: 12px 0 16px 24px;
  color: var(--text-primary);
  line-height: 1.6;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  list-style: none;
}

.card-container ul li::before, .card-container ol li::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  margin-left: -20px;
  vertical-align: middle;
  background: var(--accent);
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

.card-container blockquote {
  border-left: none;
  padding: 6px 0 6px 16px;
  margin: 12px 0;
  color: var(--text-secondary);
  font-style: italic;
  font-size: 1rem;
  position: relative;
}

.card-container blockquote::before {
  content: "";
  position: absolute;
  left: 6px;
  bottom: 12px;
  top: auto;
  transform: none;
  width: 1px;
  height: 1em;
  background: var(--accent);
  opacity: 0.5;
  box-shadow: 2px 0 0 0 var(--accent);
}

.card-container code {
  background: var(--surface);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88em;
  border: 1px solid var(--border);
}

.card-container pre {
  background: var(--bg-terminal);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  margin: 16px 0;
  overflow-x: auto;
}

.card-container pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
  border: none;
}

.card-container hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

.card-container a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  transition: border-bottom var(--transition);
}

.card-container a:hover {
  border-bottom: 2px solid var(--accent);
}

.card-container img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 8px 0;
  border: 1px solid var(--border);
}

/* ============================================
   EDITOR MODE — Single Panel
   ============================================ */
.editor-panel {
  padding: 0 !important;
  border-bottom: 1px solid var(--border);
}

.editor-single {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
}

.editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--surface);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  flex-shrink: 0;
  letter-spacing: 0.03em;
}

.editor-header span:first-child {
  color: var(--text-primary);
  font-weight: 600;
}

.editor-hint {
  font-size: 0.65rem;
  color: var(--text-muted);
  opacity: 0.8;
}

/* --- Code Editor (full-width, no preview) --- */
.code-editor {
  flex: 1;
  background: var(--bg-editor);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.75;
  padding: 22px;
  border: none;
  outline: none;
  resize: none;
  tab-size: 2;
  white-space: pre-wrap;
  word-wrap: break-word;
  caret-color: var(--accent);
}

.code-editor::placeholder { color: var(--text-muted); }

.code-editor:focus {
  box-shadow: inset 0 0 0 1px var(--accent);
}

/* ============================================
   TERMINAL PANEL —学术莫兰迪终端
   ============================================ */
.terminal-panel {
  position: relative;
  background: var(--bg-terminal);
  border-top: 1px solid var(--accent);
  height: 320px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: terminalSlideIn 0.15s ease-out;
}

.terminal-panel.hidden {
  display: none;
}

@keyframes terminalSlideIn {
  from { height: 0; opacity: 0; }
  to { height: 320px; opacity: 1; }
}

.terminal-resize-handle {
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 6px;
  cursor: ns-resize;
  z-index: 10;
}

.terminal-resize-handle:hover { background: var(--accent); opacity: 0.15; }

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--surface);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  user-select: none;
}

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  font-weight: 600;
  letter-spacing: 0.06em;
  font-variant: small-caps;
}

.terminal-actions { display: flex; align-items: center; gap: 12px; }

.terminal-user-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-secondary);
  background: var(--surface-hover);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-weight: 600;
}

.terminal-close-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 1px 5px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  line-height: 1;
  font-family: var(--font-mono);
}

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

.terminal-output {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-wrap: break-word;
}

.terminal-output::-webkit-scrollbar { width: 6px; }
.terminal-output::-webkit-scrollbar-track { background: transparent; }
.terminal-output::-webkit-scrollbar-thumb { background: var(--border); border-radius: var(--radius-sm); }
.terminal-output::-webkit-scrollbar-thumb:hover { background: var(--accent); }

.preview-pane h1 { font-family: var(--font-display); }

.terminal-welcome pre {
  color: var(--accent);
  font-size: 0.65rem;
  line-height: 1.3;
  margin-bottom: 12px;
  opacity: 0.7;
}

.terminal-welcome p {
  margin-bottom: 4px;
  color: var(--text-muted);
  font-size: 0.73rem;
}

.terminal-welcome code, .terminal-welcome kbd {
  background: var(--surface);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.73rem;
  color: var(--accent);
  border: 1px solid var(--border);
}

.command-line { color: var(--accent); margin-bottom: 2px; font-weight: 600; }
.command-line .prompt { color: var(--text-secondary); }
.output-line { color: var(--text-secondary); margin-bottom: 1px; }
.output-line.error { color: var(--red); font-weight: 600; }

.terminal-input-line {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-terminal);
  flex-shrink: 0;
}

.terminal-prompt {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  margin-right: 8px;
  user-select: none;
}

.terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  caret-color: var(--accent);
}

.terminal-input::placeholder { color: var(--text-muted); }

/* ============================================
   STATUS BAR
   ============================================ */
.status-bar {
  width: 100%;
  height: 28px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  user-select: none;
  flex-shrink: 0;
  letter-spacing: 0.03em;
}

.status-bar.below-fold { margin-top: 0; }

.status-mode {
  color: var(--accent);
  font-weight: 600;
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: var(--radius-sm); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .card-container { padding: 32px 24px; }
  .terminal-panel { height: 240px; }
}