/* ═══════════════════════════════════════════════════════════
   CODESYNC — DESIGN SYSTEM
   Palette: Volcanic Glass + Electric Cyan
   Fonts: JetBrains Mono + Outfit
═══════════════════════════════════════════════════════════ */

:root {
  /* Core Colors */
  --bg-base:        #0e0e0e;
  --bg-surface:     #161616;
  --bg-elevated:    #1e1e1e;
  --bg-hover:       #252525;
  --bg-active:      #2a2a2a;
  --border:         #2e2e2e;
  --border-bright:  #3d3d3d;

  /* Text */
  --text-primary:   #e8e4df;
  --text-secondary: #8a8a8a;
  --text-muted:     #555;
  --text-inverse:   #0e0e0e;

  /* Brand */
  --orange:         #FF6B2B;
  --orange-dim:     #cc5522;
  --orange-glow:    rgba(255, 107, 43, 0.15);
  --cyan:           #00E5FF;
  --cyan-dim:       #00b8cc;
  --cyan-glow:      rgba(0, 229, 255, 0.12);

  /* Collaborator Colors */
  --collab-1:       #FF6B2B;
  --collab-2:       #00E5FF;
  --collab-3:       #A78BFA;
  --collab-4:       #34D399;
  --collab-5:       #F59E0B;
  --collab-6:       #F472B6;

  /* Editor */
  --editor-bg:      #111111;
  --editor-gutter:  #1a1a1a;
  --editor-line-hl: rgba(255, 107, 43, 0.04);
  --editor-select:  rgba(0, 229, 255, 0.15);

  /* Syntax */
  --syn-keyword:    #FF6B2B;
  --syn-string:     #A8FF78;
  --syn-comment:    #555;
  --syn-number:     #FFB088;
  --syn-function:   #00E5FF;
  --syn-operator:   #e8e4df;
  --syn-type:       #A78BFA;
  --syn-property:   #7dd3fc;

  /* Spacing */
  --topbar-h:       48px;
  --sidebar-w:      220px;
  --panel-w:        300px;
  --toolbar-h:      38px;
  --statusbar-h:    26px;

  /* Typography */
  --font-ui:        'Outfit', sans-serif;
  --font-mono:      'JetBrains Mono', monospace;

  /* Radius */
  --r-sm:   4px;
  --r-md:   6px;
  --r-lg:   10px;

  /* Transitions */
  --t-fast: 120ms ease;
  --t-med:  220ms ease;
  --t-slow: 380ms ease;
}

/* Light theme override */
body.theme-light {
  --bg-base:        #f5f5f5;
  --bg-surface:     #ffffff;
  --bg-elevated:    #f0f0f0;
  --bg-hover:       #e8e8e8;
  --bg-active:      #e0e0e0;
  --border:         #d0d0d0;
  --border-bright:  #b8b8b8;
  --text-primary:   #1a1a1a;
  --text-secondary: #555;
  --text-muted:     #999;
  --editor-bg:      #fafafa;
  --editor-gutter:  #f0f0f0;
  --syn-comment:    #999;
}

body.theme-darker {
  --bg-base:        #080808;
  --bg-surface:     #0d0d0d;
  --bg-elevated:    #141414;
  --bg-hover:       #1a1a1a;
  --bg-active:      #1f1f1f;
  --border:         #222;
  --editor-bg:      #090909;
}

/* ═══════════════════════════════════════════
   RESET & BASE
═══════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }
ul { list-style: none; }

/* ═══════════════════════════════════════════
   SCREENS
═══════════════════════════════════════════ */
.screen {
  position: fixed;
  inset: 0;
  display: none;
  opacity: 0;
  transition: opacity var(--t-slow);
}
.screen.active {
  display: flex;
  flex-direction: column;
  opacity: 1;
}

/* ═══════════════════════════════════════════
   LANDING SCREEN
═══════════════════════════════════════════ */
#landing-screen {
  background: var(--bg-base);
  overflow-y: auto;
  flex-direction: column;
}

.landing-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
  animation: orb-drift 12s ease-in-out infinite alternate;
}
.glow-orb--1 {
  width: 500px; height: 500px;
  background: var(--orange);
  top: -100px; left: -100px;
  animation-delay: 0s;
}
.glow-orb--2 {
  width: 400px; height: 400px;
  background: var(--cyan);
  bottom: -80px; right: -80px;
  animation-delay: -6s;
}

@keyframes orb-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, 30px) scale(1.1); }
}

/* Landing Header */
.landing-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(14,14,14,0.8);
  backdrop-filter: blur(12px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-text {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}
.logo--sm .logo-text { font-size: 14px; }

.landing-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-link {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: color var(--t-fast);
}
.nav-link:hover { color: var(--text-primary); text-decoration: none; }

/* Landing Main */
.landing-main {
  position: relative;
  z-index: 10;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px 40px;
  gap: 48px;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  max-width: 640px;
  width: 100%;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border-bright);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface);
  letter-spacing: 0.02em;
}

.pulse-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #34D399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.4);
  animation: pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(52,211,153,0.5); }
  70%  { box-shadow: 0 0 0 8px rgba(52,211,153,0); }
  100% { box-shadow: 0 0 0 0 rgba(52,211,153,0); }
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -2px;
  color: var(--text-primary);
}
.title-accent {
  color: var(--orange);
  position: relative;
}
.title-accent::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
  border-radius: 2px;
}

.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
}

/* Join Panel */
.join-panel {
  width: 100%;
  max-width: 480px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,107,43,0.05);
}

.join-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}
.join-tab {
  flex: 1;
  padding: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border-bottom: 2px solid transparent;
  transition: all var(--t-fast);
  letter-spacing: 0.03em;
}
.join-tab:hover { color: var(--text-secondary); }
.join-tab.active {
  color: var(--orange);
  border-bottom-color: var(--orange);
  background: var(--orange-glow);
}

.join-form {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.join-form.hidden { display: none; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.input-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  text-transform: uppercase;
}
.label-opt {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-muted);
}

.input-field {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font-ui);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  outline: none;
}
.input-field:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px var(--orange-glow);
}
.input-field::placeholder { color: var(--text-muted); }
.input-mono { font-family: var(--font-mono); letter-spacing: 0.1em; }

.select-field {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' stroke='%23555' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
  cursor: pointer;
}
.select-field option { background: var(--bg-elevated); }

/* Buttons */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  background: var(--orange);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-ui);
  border-radius: var(--r-md);
  letter-spacing: 0.02em;
  transition: all var(--t-fast);
  position: relative;
  overflow: hidden;
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 60%);
  pointer-events: none;
}
.btn-primary:hover {
  background: #ff7d42;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255,107,43,0.35);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary.btn-sm { padding: 8px 14px; font-size: 12px; }

.btn-ghost {
  padding: 7px 16px;
  border: 1px solid var(--border-bright);
  border-radius: var(--r-md);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: all var(--t-fast);
}
.btn-ghost:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

/* Feature Strip */
.feature-strip {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  justify-content: center;
}
.feature-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 20px;
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}
.feature-icon { font-size: 14px; }
.feature-divider {
  width: 1px;
  height: 16px;
  background: var(--border);
}

/* ═══════════════════════════════════════════
   EDITOR SCREEN LAYOUT
═══════════════════════════════════════════ */
#editor-screen {
  background: var(--bg-base);
  flex-direction: column;
}

/* TOP BAR */
.editor-topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px 0 16px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 12px;
  z-index: 100;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.room-info {
  display: flex;
  align-items: center;
  gap: 6px;
}
.room-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}
.room-code {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.08em;
}
.btn-copy-room {
  color: var(--text-muted);
  padding: 3px;
  border-radius: var(--r-sm);
  transition: color var(--t-fast);
  position: relative;
}
.btn-copy-room:hover { color: var(--text-primary); }

.copy-toast {
  font-size: 10px;
  color: #34D399;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--t-fast);
  pointer-events: none;
}
.copy-toast.show { opacity: 1; }

.topbar-center {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  justify-content: center;
}

.sync-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(52,211,153,0.08);
  border: 1px solid rgba(52,211,153,0.2);
}
.sync-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #34D399;
  animation: pulse-ring 2s ease-out infinite;
}
.sync-label {
  font-size: 11px;
  font-weight: 600;
  color: #34D399;
  letter-spacing: 0.05em;
}
.sync-indicator.syncing .sync-dot { background: var(--orange); }
.sync-indicator.syncing .sync-label { color: var(--orange); }

.file-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--t-fast);
}
.file-tab.active {
  color: var(--text-primary);
  border-color: var(--orange);
  background: var(--orange-glow);
}
.file-tab svg { color: var(--orange); }

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.presence-bar {
  display: flex;
  align-items: center;
  gap: -4px;
}

.avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  margin-left: -6px;
  cursor: pointer;
  transition: transform var(--t-fast), z-index var(--t-fast);
  position: relative;
  z-index: 1;
}
.avatar:first-child { margin-left: 0; }
.avatar:hover { transform: translateY(-3px) scale(1.1); z-index: 10; }

.avatar-tooltip {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elevated);
  border: 1px solid var(--border-bright);
  border-radius: var(--r-sm);
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--t-fast);
}
.avatar:hover .avatar-tooltip { opacity: 1; }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-icon {
  width: 30px; height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  color: var(--text-secondary);
  transition: all var(--t-fast);
}
.btn-icon:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.btn-icon--danger:hover {
  background: rgba(239,68,68,0.1);
  color: #ef4444;
}

/* ═══════════════════════════════════════════
   WORKSPACE LAYOUT
═══════════════════════════════════════════ */
.workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

/* ═══════════════════════════════════════════
   SIDEBAR
═══════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-section {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.sidebar-section--bottom {
  margin-top: auto;
  border-bottom: none;
  border-top: 1px solid var(--border);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.sidebar-add {
  width: 18px; height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1;
  transition: all var(--t-fast);
}
.sidebar-add:hover {
  background: var(--bg-hover);
  color: var(--orange);
}

.file-tree { padding: 0 6px; }
.file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--t-fast);
}
.file-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.file-item.active {
  background: var(--orange-glow);
  color: var(--orange);
  border: 1px solid rgba(255,107,43,0.2);
}
.file-item svg { flex-shrink: 0; opacity: 0.6; }
.file-item.active svg { opacity: 1; }

.collab-list { padding: 0 6px; }
.collab-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  border-radius: var(--r-sm);
  font-size: 12px;
  color: var(--text-secondary);
}
.collab-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.collab-name { flex: 1; font-weight: 500; }
.collab-you {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg-elevated);
  padding: 1px 5px;
  border-radius: 3px;
}
.collab-typing {
  font-size: 10px;
  color: var(--text-muted);
  font-style: italic;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 14px;
}
.settings-label {
  font-size: 12px;
  color: var(--text-secondary);
}
.settings-select {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  font-size: 11px;
  padding: 3px 6px;
  outline: none;
  cursor: pointer;
}

.font-size-ctrl {
  display: flex;
  align-items: center;
  gap: 6px;
}
.fs-btn {
  width: 20px; height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1;
  transition: all var(--t-fast);
}
.fs-btn:hover { border-color: var(--orange); color: var(--orange); }
.fs-val {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
  min-width: 20px;
  text-align: center;
}

/* Toggle */
.toggle { display: flex; align-items: center; cursor: pointer; }
.toggle input { display: none; }
.toggle-track {
  width: 32px; height: 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 100px;
  position: relative;
  transition: all var(--t-fast);
}
.toggle-track::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all var(--t-fast);
}
.toggle input:checked + .toggle-track {
  background: var(--orange-glow);
  border-color: var(--orange);
}
.toggle input:checked + .toggle-track::after {
  background: var(--orange);
  transform: translateX(14px);
}

/* ═══════════════════════════════════════════
   EDITOR CONTAINER
═══════════════════════════════════════════ */
.editor-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--editor-bg);
  min-width: 0;
}

.editor-toolbar {
  height: var(--toolbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 8px;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-select {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  font-size: 12px;
  font-family: var(--font-mono);
  padding: 4px 8px;
  outline: none;
  cursor: pointer;
  transition: border-color var(--t-fast);
}
.lang-select:focus { border-color: var(--orange); }

.toolbar-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  transition: all var(--t-fast);
}
.toolbar-btn:hover {
  border-color: var(--border-bright);
  color: var(--text-primary);
}
.toolbar-btn:active { transform: scale(0.97); }

/* Editor Body */
.editor-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

.line-numbers {
  width: 52px;
  flex-shrink: 0;
  background: var(--editor-gutter);
  border-right: 1px solid var(--border);
  padding: 16px 0;
  overflow: hidden;
  user-select: none;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
  text-align: right;
}
.line-num {
  padding: 0 10px 0 4px;
  display: block;
  transition: color var(--t-fast);
}
.line-num.active { color: var(--orange); }

.editor-scroll-area {
  flex: 1;
  position: relative;
  overflow: auto;
}

.code-editor {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 16px;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: transparent;
  caret-color: var(--orange);
  z-index: 2;
  white-space: pre;
  overflow-wrap: normal;
  tab-size: 2;
  -webkit-text-fill-color: transparent;
}
.code-editor::selection {
  background: var(--editor-select);
  -webkit-text-fill-color: transparent;
}

.code-highlight {
  position: absolute;
  inset: 0;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre;
  overflow-wrap: normal;
  pointer-events: none;
  z-index: 1;
  tab-size: 2;
  margin: 0;
}

/* Syntax highlight classes */
.tok-keyword  { color: var(--syn-keyword); font-weight: 600; }
.tok-string   { color: var(--syn-string); }
.tok-comment  { color: var(--syn-comment); font-style: italic; }
.tok-number   { color: var(--syn-number); }
.tok-function { color: var(--syn-function); }
.tok-operator { color: var(--syn-operator); }
.tok-type     { color: var(--syn-type); }
.tok-property { color: var(--syn-property); }
.tok-punct    { color: var(--text-secondary); }

/* Remote Cursors */
.remote-cursors {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}
.remote-cursor {
  position: absolute;
  width: 2px;
  border-radius: 1px;
  animation: cursor-blink 1.2s ease-in-out infinite;
}
.remote-cursor-label {
  position: absolute;
  top: -20px;
  left: 0;
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-ui);
  padding: 2px 6px;
  border-radius: 3px 3px 3px 0;
  white-space: nowrap;
  color: #fff;
  pointer-events: none;
}
@keyframes cursor-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

/* Status Bar */
.editor-statusbar {
  height: var(--statusbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 6px;
}
.status-item {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}
.status-sep { color: var(--border-bright); font-size: 11px; }

.typing-indicator {
  color: var(--cyan);
  font-style: italic;
  font-family: var(--font-ui);
  font-size: 11px;
  min-width: 120px;
}

/* ═══════════════════════════════════════════
   RIGHT PANEL
═══════════════════════════════════════════ */
.right-panel {
  width: var(--panel-w);
  flex-shrink: 0;
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.panel-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 10px 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--t-fast);
  position: relative;
}
.panel-tab:hover { color: var(--text-secondary); }
.panel-tab.active {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  background: var(--cyan-glow);
}

.unread-badge {
  position: absolute;
  top: 6px; right: 6px;
  min-width: 16px; height: 16px;
  background: var(--orange);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  border-radius: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}
.unread-badge.hidden { display: none; }

.panel-content {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}
.panel-content.active { display: flex; }

/* Chat */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 2px; }

.chat-msg {
  display: flex;
  flex-direction: column;
  gap: 3px;
  animation: msg-in 0.2s ease-out;
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.chat-msg--system .chat-msg-text {
  font-size: 11px;
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  padding: 4px 0;
}
.chat-msg-header {
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.chat-msg-author {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.chat-msg-time {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.chat-msg-text {
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.5;
  word-break: break-word;
}
.chat-msg-text code {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-elevated);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--cyan);
}

.chat-input-area {
  padding: 10px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.chat-input-row {
  display: flex;
  gap: 6px;
}
.chat-input {
  flex: 1;
  padding: 8px 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: border-color var(--t-fast);
}
.chat-input:focus { border-color: var(--cyan); }
.chat-input::placeholder { color: var(--text-muted); }

.btn-send {
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cyan);
  color: var(--bg-base);
  border-radius: var(--r-md);
  transition: all var(--t-fast);
  flex-shrink: 0;
}
.btn-send:hover {
  background: var(--cyan-dim);
  transform: scale(1.05);
}

/* Output Panel */
.output-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.output-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.output-console {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
}
.output-line { color: var(--text-primary); }
.output-line--info { color: var(--text-muted); font-style: italic; }
.output-line--error { color: #ef4444; }
.output-line--warn  { color: var(--orange); }
.output-line--log   { color: var(--text-primary); }
.output-line--result { color: var(--cyan); }

/* History Panel */
.history-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}
.history-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px;
  border-radius: var(--r-sm);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--t-fast);
}
.history-item:hover { background: var(--bg-hover); }
.history-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-top: 4px;
  flex-shrink: 0;
}
.history-info { flex: 1; min-width: 0; }
.history-action {
  font-size: 12px;
  color: var(--text-primary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.history-meta {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* ═══════════════════════════════════════════
   MODALS
═══════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: overlay-in 0.15s ease-out;
}
.modal-overlay.hidden { display: none; }

@keyframes overlay-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal {
  background: var(--bg-elevated);
  border: 1px solid var(--border-bright);
  border-radius: var(--r-lg);
  width: 100%;
  max-width: 440px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
  animation: modal-in 0.2s ease-out;
}
.modal--sm { max-width: 320px; }

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}
.modal-close {
  width: 24px; height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  font-size: 18px;
  transition: all var(--t-fast);
}
.modal-close:hover { background: var(--bg-hover); color: var(--text-primary); }

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.modal-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.share-link-row {
  display: flex;
  gap: 8px;
}
.share-link-row .input-field { flex: 1; font-size: 12px; }

.share-qr-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px;
  border: 1px dashed var(--border-bright);
  border-radius: var(--r-md);
}
.qr-mock {
  width: 80px; height: 80px;
  background: var(--bg-surface);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}
.qr-inner {
  width: 60px; height: 60px;
  background:
    repeating-linear-gradient(0deg, var(--border) 0px, var(--border) 2px, transparent 2px, transparent 6px),
    repeating-linear-gradient(90deg, var(--border) 0px, var(--border) 2px, transparent 2px, transparent 6px);
  border-radius: 2px;
}
.share-qr-placeholder span {
  font-size: 11px;
  color: var(--text-muted);
}

/* ═══════════════════════════════════════════
   RUN TOAST
═══════════════════════════════════════════ */
.run-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-bright);
  border-radius: var(--r-md);
  padding: 10px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  z-index: 500;
  opacity: 0;
  transition: all var(--t-med);
}
.run-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.run-toast.hidden { display: none; }
.run-toast-icon { color: var(--orange); font-size: 12px; }

/* ═══════════════════════════════════════════
   SCROLLBARS
═══════════════════════════════════════════ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ═══════════════════════════════════════════
   WORD WRAP
═══════════════════════════════════════════ */
.wrap-on .code-editor,
.wrap-on .code-highlight {
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

/* ═══════════════════════════════════════════
   ANIMATIONS — PAGE LOAD
═══════════════════════════════════════════ */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-badge    { animation: fade-up 0.5s ease-out 0.1s both; }
.hero-title    { animation: fade-up 0.5s ease-out 0.2s both; }
.hero-sub      { animation: fade-up 0.5s ease-out 0.3s both; }
.join-panel    { animation: fade-up 0.5s ease-out 0.4s both; }
.feature-strip { animation: fade-up 0.5s ease-out 0.5s both; }

/* ═══════════════════════════════════════════
   SYNC PULSE ANIMATION
═══════════════════════════════════════════ */
@keyframes sync-flash {
  0%   { box-shadow: 0 0 0 0 rgba(0,229,255,0.4); }
  50%  { box-shadow: 0 0 0 6px rgba(0,229,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,229,255,0); }
}
.sync-flash { animation: sync-flash 0.6s ease-out; }

/* ═══════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════ */
@media (max-width: 900px) {
  :root { --sidebar-w: 0px; --panel-w: 0px; }
  .sidebar, .right-panel { display: none; }
}
@media (max-width: 600px) {
  .landing-header { padding: 16px 20px; }
  .landing-nav { display: none; }
  .hero-title { font-size: 32px; }
  .form-row { grid-template-columns: 1fr; }
  .topbar-center { display: none; }
}