/* ══════════════════════════════════════════════════════════════
   PALL AGENTX — LUXURY NOIR GOLD DESIGN SYSTEM v1.2
   Premium Autonomous AI Interface
   ══════════════════════════════════════════════════════════════ */

/* ── CSS Custom Properties ───────────────────────────────── */
:root {
  /* Core Palette */
  --black:        #000000;
  --black-soft:   #050505;
  --charcoal-1:   #0a0a0a;
  --charcoal-2:   #111111;
  --charcoal-3:   #1a1a1a;
  --charcoal-4:   #222222;
  --charcoal-5:   #2a2a2a;
  --gray-dark:    #333333;
  --gray-mid:     #555555;
  --gray-light:   #888888;
  --gray-soft:    #aaaaaa;
  --white-dim:    #cccccc;
  --white-soft:   #e0e0e0;
  --white:        #f5f5f5;

  /* Gold Palette */
  --gold:         #c9a84c;
  --gold-light:   #f0d98c;
  --gold-dark:    #a07c2e;
  --gold-muted:   #8a7030;
  --gold-glow:    rgba(201, 168, 76, 0.15);
  --gold-border:  rgba(201, 168, 76, 0.2);
  --gold-border-hover: rgba(201, 168, 76, 0.4);

  /* Typography */
  --font-display: 'Cinzel', serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'Share Tech Mono', 'SF Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --ease-premium: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 800ms;
  --duration-glacial: 1200ms;

  /* Sidebar */
  --sidebar-width: 280px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  background-color: var(--black);
  color: var(--white-soft);
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
  width: 100vw;
}

::selection {
  background: var(--gold);
  color: var(--black);
}

::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--charcoal-5);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gray-dark);
}

/* ── App Container (Split Screen) ────────────────────────── */
.app-container {
  display: flex;
  flex-direction: row;
  height: 100vh;
  height: 100dvh;
  width: 100%;
  overflow: hidden;
}

/* ══════════════════════════════════════════════════════════════
   LEFT PANEL — Visual / 3D Canvas Area
   ══════════════════════════════════════════════════════════════ */
.panel-visual {
  flex: 0 0 42%;
  max-width: 42%;
  height: 100%;
  background: var(--black);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--gold-border);
}

.visual-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--space-2xl);
  text-align: center;
}

/* Ambient Canvas */
#ambient-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.4;
}

/* Brand Block */
.brand-block {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  margin: auto 0; /* Auto margin pushes the panel-bottom-info to the bottom while centering the brand block */
  animation: fadeInUp var(--duration-glacial) var(--ease-premium) both;
}

/* ══════════════════════════════════════════════════════════════
   3D DIGITAL EARTH GLOBE
   ══════════════════════════════════════════════════════════════ */
.earth-container {
  position: relative;
  width: 160px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
}

/* Ambient glow behind the globe */
.earth-glow {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 168, 76, 0.12) 0%, rgba(201, 168, 76, 0.04) 40%, transparent 70%);
  animation: earthGlowPulse 4s ease-in-out infinite;
  z-index: 0;
}

/* The sphere itself */
.earth-sphere {
  position: relative;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(201, 168, 76, 0.08) 0%, rgba(0, 0, 0, 0.9) 60%, rgba(0, 0, 0, 1) 100%);
  border: 1px solid rgba(201, 168, 76, 0.25);
  box-shadow:
    0 0 30px rgba(201, 168, 76, 0.08),
    0 0 60px rgba(201, 168, 76, 0.04),
    inset 0 0 40px rgba(0, 0, 0, 0.8),
    inset -8px -8px 20px rgba(201, 168, 76, 0.05);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: earthRotate 30s linear infinite;
  z-index: 2;
}

/* Longitude lines (vertical ellipses) */
.earth-line.longitude {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 0.5px solid rgba(201, 168, 76, 0.15);
  top: 0;
  left: 0;
}

.earth-line.longitude.l1 { transform: rotateY(0deg); }
.earth-line.longitude.l2 { transform: rotateY(36deg); }
.earth-line.longitude.l3 { transform: rotateY(72deg); }
.earth-line.longitude.l4 { transform: rotateY(108deg); }
.earth-line.longitude.l5 { transform: rotateY(144deg); }

/* Latitude lines (horizontal circles) */
.earth-line.latitude {
  position: absolute;
  border-radius: 50%;
  border: 0.5px solid rgba(201, 168, 76, 0.12);
  left: 50%;
  transform: translateX(-50%);
}

.earth-line.latitude.lat1 { width: 40%; height: 40%; top: 5%; }
.earth-line.latitude.lat2 { width: 70%; height: 10%; top: 22%; }
.earth-line.latitude.lat3 { width: 100%; height: 6%; top: 47%; }
.earth-line.latitude.lat4 { width: 70%; height: 10%; top: 68%; }
.earth-line.latitude.lat5 { width: 40%; height: 40%; bottom: 5%; }

/* Logo letter */
.brand-logo-letter {
  position: relative;
  z-index: 5;
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-light), var(--gold), var(--gold-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
  filter: drop-shadow(0 0 8px rgba(201, 168, 76, 0.3));
}

/* Outer orbital ring */
.earth-ring-outer {
  position: absolute;
  width: 155px;
  height: 155px;
  border-radius: 50%;
  border: 0.5px solid rgba(201, 168, 76, 0.1);
  animation: ringOrbit 20s linear infinite reverse;
  z-index: 1;
}

.earth-ring-outer::before {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 6px var(--gold), 0 0 12px rgba(201, 168, 76, 0.3);
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: 6px;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 50%, var(--gold-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-subtitle {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 8px;
  text-transform: uppercase;
  color: var(--gray-light);
}

.brand-line {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: var(--space-sm) 0;
}

.brand-tagline {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--gray-mid);
  font-style: italic;
  max-width: 260px;
  line-height: 1.6;
}

/* ── Status Bar ──────────────────────────────────────────── */
.status-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}

.status-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray-mid);
  transition: background var(--duration-normal) var(--ease-premium);
}

.status-dot.active {
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold-glow);
  animation: pulseGold 3s ease-in-out infinite;
}

.status-label {
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-mid);
}

/* ── Bottom Info Block (Contact + Tech Data) ─────────────── */
.panel-bottom-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  z-index: 3;
  text-align: center;
  animation: fadeIn var(--duration-glacial) var(--ease-premium) 1s both;
  width: 90%;
  max-width: 340px;
}

.contact-line {
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: 400;
  color: var(--gold-dark);
  letter-spacing: 0.5px;
  line-height: 1.5;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid rgba(201, 168, 76, 0.1);
  border-radius: var(--radius-sm);
  background: rgba(201, 168, 76, 0.03);
}

.tech-data-block {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: center;
}

.tech-line {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  color: var(--charcoal-5);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  line-height: 1.6;
  user-select: none;
}

/* ══════════════════════════════════════════════════════════════
   RIGHT PANEL — Chat Interface
   ══════════════════════════════════════════════════════════════ */
.panel-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--black-soft);
  position: relative;
  overflow: hidden;
}

/* ══════════════════════════════════════════════════════════════
   HISTORY SIDEBAR
   ══════════════════════════════════════════════════════════════ */
.history-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 90;
  backdrop-filter: blur(2px);
  transition: opacity var(--duration-normal) var(--ease-premium);
  cursor: pointer;
}

.history-overlay.hidden {
  display: none;
}

.history-sidebar {
  position: absolute;
  top: 0;
  right: 0;
  width: var(--sidebar-width);
  height: 100%;
  background: var(--charcoal-1);
  border-left: 1px solid var(--gold-border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-premium);
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.4);
}

.history-sidebar.open {
  transform: translateX(0);
}

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

.history-header-title {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
}

.btn-close-history {
  width: 30px;
  height: 30px;
  border: none;
}

.history-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm);
}

.history-empty {
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
  font-size: 0.7rem;
  color: var(--gray-dark);
  letter-spacing: 0.5px;
}

.history-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-premium);
  border: 1px solid transparent;
  position: relative;
}

.history-item:hover {
  background: rgba(201, 168, 76, 0.05);
  border-color: var(--gold-border);
}

.history-item.active {
  background: rgba(201, 168, 76, 0.08);
  border-color: var(--gold-border-hover);
}

.history-item-title {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--white-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
}

.history-item-meta {
  font-size: 0.6rem;
  color: var(--gray-mid);
  letter-spacing: 0.3px;
}

.history-item-delete {
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--gray-dark);
  cursor: pointer;
  padding: 4px;
  border-radius: 3px;
  opacity: 0;
  transition: all var(--duration-fast) var(--ease-premium);
  display: flex;
  align-items: center;
  justify-content: center;
}

.history-item:hover .history-item-delete {
  opacity: 1;
}

.history-item-delete:hover {
  color: #e74c3c;
  background: rgba(231, 76, 60, 0.1);
}

/* ── Chat Header ─────────────────────────────────────────── */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--charcoal-1);
  border-bottom: 1px solid var(--gold-border);
  flex-shrink: 0;
  min-height: 60px;
  backdrop-filter: blur(10px);
}

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

.header-indicator {
  width: 10px;
  height: 10px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.indicator-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  animation: pulseGold 2.5s ease-in-out infinite;
}

.header-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.header-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white-soft);
}

.header-status {
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 1px;
  color: var(--gold);
  text-transform: uppercase;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ── Icon Buttons (Shared) ───────────────────────────────── */
.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--charcoal-5);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--gray-light);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-premium);
  -webkit-tap-highlight-color: transparent;
}

.btn-icon:hover {
  color: var(--gold);
  border-color: var(--gold-border-hover);
  background: var(--gold-glow);
}

.btn-icon:active {
  transform: scale(0.95);
}

/* ── Chat Messages Area ──────────────────────────────────── */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  scroll-behavior: smooth;
}

/* ── Message Bubbles ─────────────────────────────────────── */
.message {
  display: flex;
  max-width: 85%;
  animation: fadeInUp var(--duration-slow) var(--ease-premium) both;
}

.message-user {
  align-self: flex-end;
  justify-content: flex-end;
}

.message-assistant {
  align-self: flex-start;
  justify-content: flex-start;
}

.message-system {
  align-self: center;
  max-width: 90%;
}

.message-content {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.7;
  font-weight: 400;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* User bubble */
.message-user .message-content {
  background: linear-gradient(135deg, var(--charcoal-4), var(--charcoal-3));
  border: 1px solid var(--charcoal-5);
  color: var(--white-soft);
  border-bottom-right-radius: var(--space-xs);
}

/* Assistant bubble */
.message-assistant .message-content {
  background: var(--charcoal-1);
  border: 1px solid var(--gold-border);
  color: var(--white-dim);
  border-bottom-left-radius: var(--space-xs);
}

/* System / Welcome */
.message-system .message-content {
  background: transparent;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-2xl);
}

.welcome-icon {
  opacity: 0.7;
}

.welcome-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-text {
  font-size: 0.8rem;
  color: var(--gray-mid);
  max-width: 320px;
  line-height: 1.6;
}

/* ── Message Label ───────────────────────────────────────── */
.message-label {
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
  display: block;
}

.message-user .message-label {
  color: var(--gray-mid);
  text-align: right;
}

.message-assistant .message-label {
  color: var(--gold-dark);
}

/* ── Code blocks inside messages ─────────────────────────── */
.message-content pre {
  background: var(--charcoal-2);
  border: 1px solid var(--charcoal-5);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin: var(--space-sm) 0;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.5;
}

.message-content code {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  background: var(--charcoal-3);
  padding: 2px 6px;
  border-radius: 3px;
}

.message-content pre code {
  background: none;
  padding: 0;
}

/* ── Loading Indicator ───────────────────────────────────── */
.loading-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-lg);
  transition: opacity var(--duration-slow) var(--ease-premium);
}

.loading-indicator.hidden {
  display: none;
}

.loading-dots {
  display: flex;
  gap: 5px;
}

.loading-dots .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  animation: loadingPulse 1.4s ease-in-out infinite;
}

.loading-dots .dot:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-dots .dot:nth-child(3) {
  animation-delay: 0.4s;
}

.loading-text {
  font-size: 0.7rem;
  color: var(--gray-mid);
  letter-spacing: 1px;
  text-transform: uppercase;
  animation: textFade 2s ease-in-out infinite;
}

/* ── Input Area ──────────────────────────────────────────── */
.chat-input-area {
  flex-shrink: 0;
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  background: var(--charcoal-1);
  border-top: 1px solid var(--gold-border);
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  background: var(--charcoal-2);
  border: 1px solid var(--charcoal-5);
  border-radius: var(--radius-md);
  padding: var(--space-xs) var(--space-sm);
  transition: border-color var(--duration-normal) var(--ease-premium),
              box-shadow var(--duration-normal) var(--ease-premium);
}

.input-wrapper:focus-within {
  border-color: var(--gold-border-hover);
  box-shadow: 0 0 20px rgba(201, 168, 76, 0.05);
}

.chat-input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--white-soft);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1.5;
  padding: var(--space-sm) var(--space-sm);
  resize: none;
  max-height: 120px;
  overflow-y: auto;
  outline: none;
}

.chat-input::placeholder {
  color: var(--gray-dark);
  font-weight: 300;
}

/* Voice button */
.btn-voice {
  flex-shrink: 0;
  border: none;
  width: 38px;
  height: 38px;
}

.btn-voice.listening {
  color: var(--gold);
  background: var(--gold-glow);
  animation: micPulse 1.5s ease-in-out infinite;
}

/* Send button */
.btn-send {
  flex-shrink: 0;
  border: none;
  width: 38px;
  height: 38px;
  color: var(--gray-mid);
}

.btn-send.active {
  color: var(--gold);
}

.btn-send:hover {
  background: var(--gold-glow);
}

/* Disclaimer */
.input-disclaimer {
  font-size: 0.6rem;
  color: var(--gray-dark);
  text-align: center;
  margin-top: var(--space-sm);
  letter-spacing: 0.5px;
}

/* ══════════════════════════════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════════════════════════════ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseGold {
  0%, 100% {
    box-shadow: 0 0 4px rgba(201, 168, 76, 0.3);
  }
  50% {
    box-shadow: 0 0 12px rgba(201, 168, 76, 0.6), 0 0 24px rgba(201, 168, 76, 0.15);
  }
}

@keyframes loadingPulse {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  40% {
    opacity: 1;
    transform: scale(1.1);
  }
}

@keyframes textFade {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 1; }
}

@keyframes micPulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(201, 168, 76, 0.3);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(201, 168, 76, 0), 0 0 16px rgba(201, 168, 76, 0.1);
  }
}

/* 3D Earth Animations */
@keyframes earthRotate {
  from { transform: rotateY(0deg); }
  to   { transform: rotateY(360deg); }
}

@keyframes earthGlowPulse {
  0%, 100% {
    opacity: 0.6;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.06);
  }
}

@keyframes ringOrbit {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE — TABLET (max-width: 1024px)
   ══════════════════════════════════════════════════════════════ */
@media screen and (max-width: 1024px) {
  .panel-visual {
    flex: 0 0 35%;
    max-width: 35%;
  }

  .brand-title {
    font-size: 1.4rem;
    letter-spacing: 4px;
  }

  .brand-subtitle {
    font-size: 0.65rem;
    letter-spacing: 5px;
  }

  .earth-container {
    width: 130px;
    height: 130px;
  }

  .earth-sphere {
    width: 105px;
    height: 105px;
  }

  .earth-glow {
    width: 145px;
    height: 145px;
  }

  .earth-ring-outer {
    width: 125px;
    height: 125px;
  }

  .brand-logo-letter {
    font-size: 2rem;
  }

  .history-sidebar {
    width: 260px;
  }
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE — MOBILE (max-width: 768px)
   ══════════════════════════════════════════════════════════════ */
@media screen and (max-width: 768px) {
  .app-container {
    flex-direction: column;
  }

  /* Visual panel becomes a minimal header on mobile */
  .panel-visual {
    flex: 0 0 auto;
    max-width: 100%;
    width: 100%;
    height: auto;
    min-height: 0;
    border-right: none;
    border-bottom: 1px solid var(--gold-border);
    padding: var(--space-md) var(--space-lg);
  }

  .visual-inner {
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    padding: 0;
    height: auto;
    gap: var(--space-md);
  }

  #ambient-canvas {
    display: none;
  }

  .brand-block {
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
    animation: none;
  }

  /* Earth becomes a simple badge on mobile */
  .earth-container {
    width: 40px;
    height: 40px;
    margin-bottom: 0;
  }

  .earth-glow,
  .earth-ring-outer {
    display: none;
  }

  .earth-sphere {
    width: 40px;
    height: 40px;
    animation: none;
    border: 1px solid var(--gold-border);
  }

  .earth-line {
    display: none;
  }

  .brand-logo-letter {
    font-size: 1rem;
    filter: none;
  }

  .brand-title {
    font-size: 0.85rem;
    letter-spacing: 3px;
  }

  .brand-subtitle,
  .brand-line,
  .brand-tagline {
    display: none;
  }

  .status-bar,
  .panel-bottom-info {
    display: none;
  }

  /* Chat takes full remaining space */
  .panel-chat {
    flex: 1;
    min-height: 0;
  }

  .chat-header {
    min-height: 50px;
    padding: var(--space-sm) var(--space-md);
  }

  .header-title {
    font-size: 0.75rem;
    letter-spacing: 2px;
  }

  .chat-messages {
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .message {
    max-width: 92%;
  }

  .message-content {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.88rem;
    line-height: 1.6;
  }

  .message-system .message-content {
    padding: var(--space-lg);
  }

  .welcome-title {
    font-size: 0.95rem;
  }

  .welcome-text {
    font-size: 0.75rem;
  }

  /* Input area — touch-friendly */
  .chat-input-area {
    padding: var(--space-sm) var(--space-md) var(--space-md);
  }

  .input-wrapper {
    border-radius: var(--radius-lg);
    padding: var(--space-xs) var(--space-sm);
  }

  .chat-input {
    font-size: 1rem;
    padding: var(--space-sm) var(--space-xs);
    min-height: 44px;
  }

  .btn-voice,
  .btn-send {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }

  .btn-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
  }

  .input-disclaimer {
    font-size: 0.55rem;
  }

  /* History sidebar full-width on mobile */
  .history-sidebar {
    width: 100%;
    max-width: 100%;
  }
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE — SMALL MOBILE (max-width: 480px)
   ══════════════════════════════════════════════════════════════ */
@media screen and (max-width: 480px) {
  .panel-visual {
    padding: var(--space-sm) var(--space-md);
  }

  .brand-title {
    font-size: 0.75rem;
    letter-spacing: 2px;
  }

  .earth-container {
    width: 34px;
    height: 34px;
  }

  .earth-sphere {
    width: 34px;
    height: 34px;
  }

  .chat-messages {
    padding: var(--space-sm) var(--space-md);
  }

  .message {
    max-width: 95%;
  }

  .message-content {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.85rem;
  }

  .welcome-icon {
    display: none;
  }
}

/* ══════════════════════════════════════════════════════════════
   RESPONSIVE — LANDSCAPE MOBILE
   ══════════════════════════════════════════════════════════════ */
@media screen and (max-width: 768px) and (orientation: landscape) {
  .panel-visual {
    display: none;
  }

  .panel-chat {
    height: 100vh;
    height: 100dvh;
  }
}

/* ══════════════════════════════════════════════════════════════
   SAFE AREA (iOS Notch)
   ══════════════════════════════════════════════════════════════ */
@supports (padding-top: env(safe-area-inset-top)) {
  .chat-header {
    padding-top: max(var(--space-md), env(safe-area-inset-top));
  }

  .chat-input-area {
    padding-bottom: max(var(--space-lg), env(safe-area-inset-bottom));
  }
}