/* ============================================
   AIDEN — Futuristic AI Assistant
   Palette: Deep Space + Cyan/Violet Neon
   Fonts: Syne + Share Tech Mono
   ============================================ */

:root {
  --bg-void:     #020408;
  --bg-deep:     #050C14;
  --bg-panel:    #080F1A;
  --bg-surface:  #0C1520;
  --bg-elevated: #101C2A;
  --bg-hover:    #142030;

  --cyan:        #00F5FF;
  --cyan-dim:    #00C4CC;
  --cyan-ghost:  rgba(0,245,255,0.08);
  --cyan-glow:   rgba(0,245,255,0.25);

  --violet:      #BF5FFF;
  --violet-dim:  #9B3FE0;
  --violet-ghost:rgba(191,95,255,0.08);
  --violet-glow: rgba(191,95,255,0.25);

  --pink:        #FF3CAC;
  --green-neon:  #39FF14;
  --amber:       #FFB800;

  --text-primary:   #E8F4FF;
  --text-secondary: rgba(232,244,255,0.6);
  --text-muted:     rgba(232,244,255,0.3);
  --text-ghost:     rgba(232,244,255,0.15);

  --border:      rgba(0,245,255,0.1);
  --border-bright: rgba(0,245,255,0.25);

  --font-display: 'Syne', sans-serif;
  --font-mono:    'Share Tech Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --sidebar-w: 260px;
  --topbar-h: 60px;

  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ============ RESET ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; height: 100%; }
body {
  font-family: var(--font-display);
  background: var(--bg-void);
  color: var(--text-primary);
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }
textarea { font-family: inherit; resize: none; border: none; outline: none; background: none; color: inherit; }
a { text-decoration: none; color: inherit; }

/* ============ PARTICLE CANVAS ============ */
#particleCanvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* ============ SCANLINES ============ */
.scanlines {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,245,255,0.015) 2px,
    rgba(0,245,255,0.015) 4px
  );
  animation: scanMove 8s linear infinite;
}
@keyframes scanMove {
  0% { background-position: 0 0; }
  100% { background-position: 0 100px; }
}

/* ============ BOOT SCREEN ============ */
.boot-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-void);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.boot-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  width: 360px;
}

.boot-hex {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: bootSpin 3s linear infinite;
}
@keyframes bootSpin {
  0% { filter: drop-shadow(0 0 8px var(--cyan)); }
  50% { filter: drop-shadow(0 0 20px var(--violet)); }
  100% { filter: drop-shadow(0 0 8px var(--cyan)); }
}

.boot-hex-letter {
  position: absolute;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.boot-text { text-align: center; }
.boot-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 0.3em;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.boot-sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.boot-progress { width: 100%; }
.boot-bar {
  height: 2px;
  background: rgba(0,245,255,0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
}
.boot-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  border-radius: 2px;
  transition: width 0.3s ease;
  box-shadow: 0 0 10px var(--cyan);
}
.boot-log {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan-dim);
  letter-spacing: 0.05em;
  min-height: 18px;
}

/* ============ APP LAYOUT ============ */
.app {
  position: relative;
  z-index: 2;
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ============ SIDEBAR ============ */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  transition: transform var(--transition), width var(--transition);
  position: relative;
  z-index: 10;
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--cyan), var(--violet), transparent);
  opacity: 0.4;
}

.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-hex {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 6px var(--cyan-glow));
}
.logo-hex span {
  position: absolute;
  font-weight: 800;
  font-size: 0.85rem;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-name {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.2em;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar__toggle {
  width: 30px; height: 30px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  border: 1px solid var(--border);
}
.sidebar__toggle:hover { color: var(--cyan); border-color: var(--border-bright); }

.new-chat-btn {
  margin: 16px;
  padding: 10px 16px;
  background: linear-gradient(135deg, rgba(0,245,255,0.1), rgba(191,95,255,0.1));
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-md);
  color: var(--cyan);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.new-chat-btn:hover {
  background: linear-gradient(135deg, rgba(0,245,255,0.18), rgba(191,95,255,0.18));
  box-shadow: 0 0 20px var(--cyan-glow);
}

.sidebar__section-label {
  padding: 8px 16px 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-ghost);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.chat-history {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 8px;
  overflow-y: auto;
  max-height: 180px;
}
.history-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: var(--transition);
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border: 1px solid transparent;
}
.history-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border);
}
.history-item.active {
  background: var(--cyan-ghost);
  color: var(--cyan);
  border-color: rgba(0,245,255,0.2);
}
.history-item svg { flex-shrink: 0; opacity: 0.6; }

.capability-list {
  padding: 4px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.capability-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.cap-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.cap-dot--cyan   { background: var(--cyan);       box-shadow: 0 0 6px var(--cyan); }
.cap-dot--violet { background: var(--violet);     box-shadow: 0 0 6px var(--violet); }
.cap-dot--pink   { background: var(--pink);       box-shadow: 0 0 6px var(--pink); }
.cap-dot--green  { background: var(--green-neon); box-shadow: 0 0 6px var(--green-neon); }

.sidebar__footer {
  margin-top: auto;
  padding: 16px;
  border-top: 1px solid var(--border);
}
.system-status {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}
.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}
.status-val { color: var(--cyan-dim); }
.status-val--online { color: var(--green-neon); }
.sidebar__version {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-ghost);
  letter-spacing: 0.05em;
}

/* ============ CHAT MAIN ============ */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  position: relative;
}

/* ============ TOPBAR ============ */
.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(5,12,20,0.8);
  backdrop-filter: blur(12px);
  flex-shrink: 0;
  position: relative;
  z-index: 5;
}
.topbar::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--violet), transparent);
  opacity: 0.4;
}

.topbar__left { display: flex; align-items: center; gap: 12px; }
.mobile-menu-btn {
  display: none;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.mobile-menu-btn:hover { color: var(--cyan); border-color: var(--border-bright); }

.topbar__title { display: flex; flex-direction: column; }
.topbar__name {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.15em;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.topbar__status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.status-pulse {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green-neon);
  box-shadow: 0 0 6px var(--green-neon);
  animation: statusPulse 2s ease-in-out infinite;
}
@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.topbar__right { display: flex; align-items: center; gap: 8px; }
.topbar__model {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--violet);
  letter-spacing: 0.05em;
}
.topbar__btn {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.topbar__btn:hover { color: var(--cyan); border-color: var(--border-bright); background: var(--bg-hover); }

/* ============ MESSAGES ============ */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0;
  scroll-behavior: smooth;
}
.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-track { background: transparent; }
.messages::-webkit-scrollbar-thumb { background: rgba(0,245,255,0.2); border-radius: 4px; }
.messages::-webkit-scrollbar-thumb:hover { background: rgba(0,245,255,0.4); }

/* ============ WELCOME ============ */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 24px 24px;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.welcome__avatar {
  position: relative;
  width: 120px; height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
}

.avatar-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
  animation: ringRotate linear infinite;
}
.avatar-ring--1 {
  width: 120px; height: 120px;
  border-color: rgba(0,245,255,0.3);
  animation-duration: 8s;
}
.avatar-ring--2 {
  width: 96px; height: 96px;
  border-color: rgba(191,95,255,0.25);
  animation-duration: 6s;
  animation-direction: reverse;
}
.avatar-ring--3 {
  width: 72px; height: 72px;
  border-color: rgba(0,245,255,0.15);
  animation-duration: 4s;
  border-style: dashed;
}
@keyframes ringRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.avatar-core {
  width: 56px; height: 56px;
  background: radial-gradient(circle, rgba(0,245,255,0.15), rgba(191,95,255,0.1));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px var(--cyan-glow), 0 0 60px var(--violet-glow);
}
.avatar-hex {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-hex span {
  position: absolute;
  font-weight: 800;
  font-size: 1.3rem;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome__title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.welcome__title span {
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.welcome__sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: 40px;
}

.quick-prompts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 640px;
}
.quick-prompt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-align: left;
  font-size: 0.82rem;
  color: var(--text-secondary);
  transition: var(--transition);
  line-height: 1.4;
}
.quick-prompt:hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
  color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,245,255,0.08);
}
.qp-icon { font-size: 1.1rem; flex-shrink: 0; }

/* ============ MESSAGE BUBBLES ============ */
.message {
  padding: 8px 24px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  animation: msgIn 0.3s ease;
}
@keyframes msgIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.message--user { display: flex; justify-content: flex-end; }
.message--ai { display: flex; justify-content: flex-start; gap: 12px; align-items: flex-start; }

.msg-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,245,255,0.2), rgba(191,95,255,0.1));
  border: 1px solid rgba(0,245,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 800;
  background-clip: text;
  box-shadow: 0 0 12px var(--cyan-glow);
  color: var(--cyan);
  font-family: var(--font-display);
}

.msg-bubble {
  max-width: 75%;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  font-size: 0.92rem;
  line-height: 1.75;
}

.message--user .msg-bubble {
  background: linear-gradient(135deg, rgba(0,245,255,0.12), rgba(191,95,255,0.12));
  border: 1px solid rgba(0,245,255,0.2);
  border-radius: var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);
  color: var(--text-primary);
}

.message--ai .msg-bubble {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
  color: var(--text-primary);
}

.msg-bubble p { margin-bottom: 10px; }
.msg-bubble p:last-child { margin-bottom: 0; }
.msg-bubble code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: rgba(0,245,255,0.08);
  border: 1px solid rgba(0,245,255,0.15);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--cyan);
}
.msg-bubble pre {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  margin: 12px 0;
}
.msg-bubble pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.82rem;
  color: var(--cyan-dim);
  display: block;
  white-space: pre;
}
.msg-bubble strong { color: var(--cyan); font-weight: 600; }
.msg-bubble em { color: var(--violet); font-style: italic; }
.msg-bubble ul, .msg-bubble ol {
  padding-left: 20px;
  margin: 8px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.msg-bubble li { color: var(--text-secondary); }

.msg-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding: 0 2px;
}
.msg-time {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-ghost);
}
.msg-copy {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-ghost);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: var(--transition);
}
.msg-copy:hover {
  color: var(--cyan);
  border-color: rgba(0,245,255,0.2);
  background: var(--cyan-ghost);
}

/* ============ TYPING INDICATOR ============ */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 24px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}
.typing-bubble {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.typing-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  animation: typingBounce 1.2s ease-in-out infinite;
  box-shadow: 0 0 6px var(--cyan);
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; background: var(--violet); box-shadow: 0 0 6px var(--violet); }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.6; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* ============ INPUT AREA ============ */
.input-area {
  padding: 16px 24px 20px;
  border-top: 1px solid var(--border);
  background: rgba(5,12,20,0.9);
  backdrop-filter: blur(12px);
  flex-shrink: 0;
  position: relative;
}
.input-area::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--violet), transparent);
  opacity: 0.3;
}

.input-wrap {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
}

.input-glow {
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
  filter: blur(8px);
}
.input-wrap:focus-within .input-glow { opacity: 0.15; }

.input-box {
  position: relative;
  z-index: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 14px 16px;
  transition: border-color 0.3s ease;
}
.input-wrap:focus-within .input-box {
  border-color: rgba(0,245,255,0.35);
}

.input-box textarea {
  flex: 1;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-primary);
  max-height: 160px;
  overflow-y: auto;
  padding: 0;
}
.input-box textarea::placeholder { color: var(--text-ghost); }
.input-box textarea::-webkit-scrollbar { width: 3px; }
.input-box textarea::-webkit-scrollbar-thumb { background: rgba(0,245,255,0.2); border-radius: 3px; }

.input-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.char-count {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-ghost);
  white-space: nowrap;
}

.send-btn {
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  color: var(--bg-void);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  box-shadow: 0 0 16px var(--cyan-glow);
}
.send-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 0 24px var(--cyan-glow), 0 0 24px var(--violet-glow);
}
.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 860px;
  margin: 8px auto 0;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-ghost);
  letter-spacing: 0.03em;
}
.input-footer-right { display: flex; gap: 4px; align-items: center; }
kbd {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
}

/* ============ SCROLLBAR ============ */
.chat-history::-webkit-scrollbar { width: 3px; }
.chat-history::-webkit-scrollbar-thumb { background: rgba(0,245,255,0.15); border-radius: 3px; }

/* ============ LIGHT THEME ============ */
body.light-theme {
  --bg-void:     #F0F4FF;
  --bg-deep:     #E8EEFF;
  --bg-panel:    #FFFFFF;
  --bg-surface:  #F5F8FF;
  --bg-elevated: #EEF2FF;
  --bg-hover:    #E4EAFF;
  --text-primary:   #0A1020;
  --text-secondary: rgba(10,16,32,0.65);
  --text-muted:     rgba(10,16,32,0.4);
  --text-ghost:     rgba(10,16,32,0.2);
  --border:      rgba(0,100,200,0.12);
  --border-bright: rgba(0,100,200,0.3);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0; top: 0;
    height: 100vh;
    transform: translateX(-100%);
    z-index: 100;
  }
  .sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: 4px 0 40px rgba(0,0,0,0.5);
  }
  .mobile-menu-btn { display: flex; }
  .quick-prompts { grid-template-columns: 1fr; }
  .topbar__model { display: none; }
  .message { padding: 8px 16px; }
  .msg-bubble { max-width: 90%; }
  .input-area { padding: 12px 16px 16px; }
  .input-footer-right { display: none; }
}

@media (max-width: 480px) {
  .welcome { padding: 24px 16px; }
  .welcome__avatar { width: 90px; height: 90px; }
  .avatar-ring--1 { width: 90px; height: 90px; }
  .avatar-ring--2 { width: 70px; height: 70px; }
  .avatar-ring--3 { width: 52px; height: 52px; }
}