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

:root {
  --bg-primary: #1e1e1e;
  --bg-secondary: #252526;
  --bg-tertiary: #2d2d2d;
  --bg-accent: #1a2744;
  --border: #3e3e42;
  --text-primary: #cccccc;
  --text-secondary: #CCCCAA;
  --text-muted: #6a6a6a;
  --accent-blue: #0e639c;
  --accent-navy: #1a3a5c;
  --accent-hover: #2a4a7f;
  --activity-bar-width: 46px;
  --sidebar-expanded: 140px;
  --status-bar-height: 34px;
  --font-ui: 'Victor Mono', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
  --font-mono: 'Victor Mono', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
}

@media screen {
  html, body { height: 100%; overflow: hidden; }
}

body {
  font-family: var(--font-ui);
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
}

#app {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ===== Top Bar ===== */
#top-bar {
  height: 34px;
  min-height: 34px;
  background: var(--accent-navy);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  z-index: 25;
  border-bottom: 1px solid var(--border);
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-bar-title {
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-ui);
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-primary);
  background: #44678b;
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
}

.lang-toggle:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-blue);
}

.lang-toggle svg {
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

/* ===== Activity Bar / Sidebar ===== */
#activity-bar {
  width: var(--activity-bar-width);
  min-width: var(--activity-bar-width);
  background: linear-gradient(180deg, #3a3a3d 0%, #252526 30%, #1a1a1a 100%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding-top: 4px;
  gap: 0;
  z-index: 10;
  overflow: hidden;
  transition: width 0.18s ease, min-width 0.18s ease;
}

#activity-bar.expanded {
  width: var(--sidebar-expanded);
  min-width: var(--sidebar-expanded);
}

.activity-icon {
  width: 100%;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 0.15s, background 0.1s;
  border-left: 2px solid transparent;
  white-space: nowrap;
  position: relative;
}

.activity-icon:hover {
  color: #fff;
  background: var(--accent-navy);
}

.activity-icon.active {
  color: #fff;
  border-left-color: #fff;
  background: var(--accent-navy);
}

.activity-icon svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.activity-label {
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.1s ease;
}

#activity-bar.expanded .activity-label {
  opacity: 1;
}

/* Tooltip shown next to icons when the bar is collapsed */
.activity-tooltip {
  position: fixed;
  top: 0;
  left: 0;
  transform: translateY(-50%);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 12px;
  line-height: 1;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 3px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s ease;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* ===== Main Content ===== */
#main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

#editor-area {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* ===== Welcome Screen ===== */
#welcome {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  background: linear-gradient(135deg, #0a0a0a 0%, #0d1b2a 40%, #1a3a5c 100%);
}

.terminal-body {
  padding: 32px 24px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#pixel-canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  max-width: 100%;
  height: auto;
}

.welcome-desc {
  margin-top: 50px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.6;
  max-width: 95%;
}

.welcome-desc .highlight {
  color: #00e5ff;
}

.welcome-hint {
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text-muted);
  text-align: center;
}

/* ===== Editor Panes ===== */
#editor-panes {
  display: none; /* hidden by default; JS toggles to flex when a section is opened */
  flex: 1;
  overflow: hidden;
}

.editor-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  border-right: 1px solid var(--border);
}

.editor-pane:last-child {
  border-right: none;
}

.pane-tab-bar {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  min-height: 38px;
  align-items: stretch;
  overflow-x: auto;
  scrollbar-width: none;
}

.pane-tab-bar::-webkit-scrollbar { display: none; }

.pane-tab {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 12px;
  font-size: 12px;
  cursor: pointer;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-right: 1px solid var(--border);
  white-space: nowrap;
  transition: background 0.1s;
  position: relative;
  min-width: 0;
}

.pane-tab:hover {
  background: var(--bg-tertiary);
}

.pane-tab.active {
  background: linear-gradient(135deg, #0a0a0a 0%, #0d1b2a 40%, #1a3a5c 100%);
  color: #fff;
  border-bottom: 1px solid transparent;
}

.pane-tab.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-blue);
}

.pane-tab-title {
  overflow: hidden;
  text-overflow: ellipsis;
}

.pane-tab-close {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
  opacity: 1;
  transition: opacity 0.1s, background 0.1s;
}

.pane-tab-close:hover {
  background: rgba(255,255,255,0.1);
}

.pane-tab-close svg {
  width: 14px;
  height: 14px;
}

/* PDF button in tab bar */
.pane-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-right: 8px;
  margin-left: auto;
}

.pdf-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  font-size: 14px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.1s, color 0.1s;
}

.pdf-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.pdf-btn svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.pane-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  background: linear-gradient(135deg, #0a0a0a 0%, #0d1b2a 40%, #1a3a5c 100%);
}

.pane-content h2 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #fff;
}

.pane-content .section-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

/* Section content styles */
.skill-category {
  margin-bottom: 24px;
}

.skill-category h3 {
  font-size: 15px;
  font-weight: 600;
  color: #6cb6ff;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 5px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.timeline-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.timeline-item:last-child {
  border-bottom: none;
}

.timeline-date {
  font-size: 14px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  min-width: 100px;
  padding-top: 2px;
}

.timeline-body h4 {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.timeline-body .org {
  font-size: 15px;
  color: #6cb6ff;
  margin-bottom: 6px;
}

.timeline-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.project-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
  transition: border-color 0.15s;
}

.project-card:hover {
  border-color: var(--accent-blue);
}

.project-card h4 {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}

.project-card .tech {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #6cb6ff;
  margin-bottom: 8px;
}

.project-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.research-item {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.research-item:last-child { border-bottom: none; }

.research-item h4 {
  font-size: 17px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}

.research-item .venue {
  font-size: 14px;
  color: #6cb6ff;
  font-style: italic;
  margin-bottom: 6px;
}

.research-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.about-text {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.8;
}

.about-text p {
  margin-bottom: 16px;
}

/* ===== Status Bar ===== */
#status-bar {
  height: var(--status-bar-height);
  min-height: var(--status-bar-height);
  background: var(--accent-navy);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  font-size: 10px;
  color: var(--text-primary);
  z-index: 20;
}

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

.status-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-contact {
  display: flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  color: var(--text-primary);
  transition: color 0.15s;
  font-family: var(--font-mono);
  font-size: 14px;
}

.status-contact:hover {
  color: #6cb6ff;
}

.status-contact svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  flex-shrink: 0;
}

.status-separator {
  color: var(--text-muted);
  opacity: 0.5;
}

/* ===== Print Styles ===== */
@media screen {
  .print-header,
  .print-footer {
    display: none;
  }
}

@media print {
  html, body {
    width: 100%;
    height: auto;
    overflow: visible !important;
    background: #fff !important;
    color: #000 !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  body {
    display: block !important;
    flex-direction: unset !important;
  }

  #app {
    display: block !important;
    overflow: visible !important;
  }

  #top-bar,
  #activity-bar,
  #status-bar,
  #pointer-glow,
  #welcome,
  .pane-tab-bar,
  .pane-tab,
  .pane-actions,
  #editor-panes > .editor-pane:not(.printing) {
    display: none !important;
  }

  #main-content {
    display: block !important;
    overflow: visible !important;
  }

  #editor-area {
    display: block !important;
    overflow: visible !important;
  }

  #editor-panes {
    display: block !important;
    flex: unset !important;
    overflow: visible !important;
  }

  .editor-pane {
    border: none !important;
    display: block !important;
    flex: unset !important;
    flex-direction: unset !important;
    overflow: visible !important;
  }

  .editor-pane.printing {
    display: block !important;
    padding: 12mm 12mm 10mm 10mm !important;
  }

  .pane-content {
    padding: 0 !important;
    background: #fff !important;
    color: #000 !important;
    overflow: visible !important;
    flex: unset !important;
  }

  .pane-content * {
    color: #000 !important;
  }

  .pane-content .skill-tag {
    border-color: #333 !important;
    background: #f0f0f0 !important;
  }

  .pane-content .project-card {
    border-color: #ccc !important;
    background: #fafafa !important;
    break-inside: avoid;
  }

  .pane-content .timeline-item,
  .pane-content .research-item {
    break-inside: avoid;
  }

  .print-header {
    display: flex !important;
    justify-content: center;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    padding: 8px 16mm;
    font-size: 11px;
    color: #444;
    background: #fff;
    border-bottom: 1px solid #d1d1d1;
    z-index: 999;
  }

  .print-footer {
    display: flex !important;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    padding: 8px 16mm;
    font-size: 12px;
    color: #444;
    background: #fff;
    border-top: 1px solid #d1d1d1;
    z-index: 999;
  }

  .print-footer span {
    color: #444 !important;
  }

  .print-footer .print-page-number {
    /* text set by JS */
  }

  @page {
    margin: 0;
  }
}

/* ===== Pointer Glow ===== */
#pointer-glow {
  position: fixed;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  pointer-events: none;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 230, 255, 0.6), transparent 70%);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease-out;
}

/* ===== Accent dot / uptime ===== */
.status-dot {
  color: #6cb6ff;
}

#uptime {
  font-family: var(--font-mono);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #424242; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root {
    --sidebar-expanded: 200px;
  }

  .pane-content { padding: 20px; }
  .status-contact span { display: none; }
  .terminal-body { padding: 24px 16px 20px; }
  #editor-panes { flex-direction: column; }
  .editor-pane { border-right: none; border-bottom: 1px solid var(--border); }
}