/* ==========================================================================
   SPECTRIX AI - THE KINETIC MONOLITH (STITCH DESIGN SYSTEM)
   High-velocity, technical, dark-mode command terminal aesthetic
   Based on Stitch Project 6104088420499844634 ("Spectrix AI Web App")
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ----- DESIGN TOKENS (THE KINETIC MONOLITH) ----- */
:root {
  /* Tonal Surface Architecture */
  --bg-base: #0e0e0e;
  --bg-surface: #131313;
  --bg-container-lowest: #0e0e0e;
  --bg-container-low: #181818;
  --bg-container: #201f1f;
  --bg-container-high: #282828;
  --bg-container-highest: #353534;

  /* Kinetic Accent Colorways */
  --primary: #4edea3;
  --primary-container: #10b981;
  --on-primary: #003824;
  --primary-glow: rgba(78, 222, 163, 0.35);
  --primary-ambient: rgba(78, 222, 163, 0.08);

  --secondary: #38bdf8;
  --tertiary: #d2bbff;
  --error: #ffb4ab;

  /* Typography Colors */
  --text-main: #e5e2e1;
  --text-sub: #cbd5e1;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  /* Borders - Soft Ghost Borders (No harsh 1px lines) */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-medium: rgba(255, 255, 255, 0.1);
  --border-primary: rgba(78, 222, 163, 0.3);

  /* Glassmorphism */
  --glass-bg: rgba(26, 26, 26, 0.75);
  --glass-border: rgba(255, 255, 255, 0.09);
  --glass-blur: 24px;

  /* Typography Scale */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-label: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;

  /* Dimensions */
  --sidebar-width: 290px;
  --header-height: 64px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Elevation Shadows */
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 25px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 45px rgba(0, 0, 0, 0.6);
  --shadow-kinetic: 0 0 20px var(--primary-glow);
}

/* Light Theme Variables */
body:not(.dark) {
  --bg-base: #f4f4f5;
  --bg-surface: #ffffff;
  --bg-container-lowest: #f4f4f5;
  --bg-container-low: #eaeaea;
  --bg-container: #f0f0f0;
  --bg-container-high: #e4e4e7;
  --bg-container-highest: #d4d4d8;

  --primary: #059669;
  --primary-container: #10b981;
  --on-primary: #ffffff;
  --primary-glow: rgba(16, 185, 129, 0.25);
  --primary-ambient: rgba(16, 185, 129, 0.05);

  --text-main: #18181b;
  --text-sub: #3f3f46;
  --text-muted: #71717a;
  --text-dim: #a1a1aa;

  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.12);
  --border-primary: rgba(16, 185, 129, 0.35);

  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(0, 0, 0, 0.08);
}

/* Global Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ambient Visual Accent Backdrops */
.ambient-glow-top {
  position: fixed;
  top: 0;
  right: 0;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(78, 222, 163, 0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-bottom {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.03) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--bg-container-high);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
}

/* Main Container Layout */
.container {
  display: flex;
  width: 100vw;
  height: 100dvh;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-base);
  z-index: 1;
}

/* ==========================================================================
   SIDEBAR (THE DRAWER)
   ========================================================================== */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100%;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 100;
  position: relative;
}

.sidebar.is-hidden {
  transform: translateX(-100%);
  position: absolute;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  z-index: 95;
}

.sidebar-top {
  padding: 16px 18px 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 0 4px;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-family: var(--font-body);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.brand-icon-chip {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--on-primary);
  font-size: 15px;
  box-shadow: 0 0 16px var(--primary-glow);
}

.brand-badge-version {
  font-family: var(--font-label);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(78, 222, 163, 0.12);
  color: var(--primary);
  font-weight: 700;
  border: 1px solid rgba(78, 222, 163, 0.25);
}

.menu-close-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}

/* Kinetic New Chat Primary Button */
.new-chat-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 16px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  color: var(--on-primary);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  box-shadow: 0 4px 18px var(--primary-glow);
  transition: transform 0.15s, box-shadow 0.15s;
}
.new-chat-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(78, 222, 163, 0.5);
}
.new-chat-btn:active {
  transform: scale(0.98);
}
.new-chat-btn kbd {
  font-size: 10px;
  background: rgba(0, 56, 36, 0.35);
  color: #003824;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
}

/* Search Box & Backup Controls */
.sidebar-header {
  padding: 0 18px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-wrap i.search-icon {
  position: absolute;
  left: 12px;
  font-size: 13px;
  color: var(--text-dim);
  pointer-events: none;
}

.search-box {
  width: 100%;
  background: var(--bg-container-low);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 9px 12px 9px 34px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-family: inherit;
  transition: border-color 0.15s, background-color 0.15s;
}
.search-box:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-container);
  box-shadow: 0 0 0 2px rgba(78, 222, 163, 0.15);
}

.sidebar-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar-tool-btn, .export-btn, .import-btn {
  flex: 1;
  background: var(--bg-container-low);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background-color 0.15s, color 0.15s;
}
.sidebar-tool-btn:hover, .export-btn:hover, .import-btn:hover {
  background: var(--bg-container);
  color: var(--text-main);
}

/* History List */
.history-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.history-group-header, .history-group-title {
  font-family: var(--font-label);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  padding: 12px 6px 6px;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  color: var(--text-sub);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s, color 0.15s;
  text-decoration: none;
}
.history-item:hover {
  background: var(--bg-container-low);
  color: var(--text-main);
}
.history-item.active {
  background: var(--bg-container);
  color: var(--primary);
  border-color: rgba(78, 222, 163, 0.25);
  font-weight: 600;
}
.history-item .title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-right: 8px;
}

.chat-actions, .history-item-actions {
  display: none;
  align-items: center;
  gap: 4px;
}
.history-item:hover .chat-actions, .history-item.active .chat-actions,
.history-item:hover .history-item-actions, .history-item.active .history-item-actions {
  display: flex;
}

.chat-action-btn, .pin-btn, .delete-btn, .pin-chat, .delete-chat {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
  font-size: 11px;
}
.chat-action-btn:hover, .pin-btn:hover, .pin-chat:hover {
  color: var(--primary);
}
.delete-btn:hover, .delete-chat:hover {
  color: #ef4444;
}

/* Sidebar Footer & Settings */
.sidebar-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

.sidebar-settings-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-container-low);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.sidebar-settings-btn:hover {
  background: var(--bg-container);
  border-color: var(--border-medium);
}

.settings-menu {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 0;
  width: 100%;
  background: var(--bg-container-high);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 6px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  z-index: 120;
  flex-direction: column;
  gap: 2px;
}
.settings-menu.open {
  display: flex;
}

.settings-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: transparent;
  border: none;
  color: var(--text-sub);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
}
.settings-item:hover {
  background: var(--bg-container);
  color: var(--text-main);
}
.settings-item i {
  width: 16px;
  font-size: 13px;
  text-align: center;
}

/* ==========================================================================
   MAIN APP & HEADER (TOP APP BAR)
   ========================================================================== */
.app {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  background-color: var(--bg-base);
  overflow: hidden;
}

header {
  height: var(--header-height);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-subtle);
  z-index: 50;
  position: sticky;
  top: 0;
}

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

.menu-btn {
  background: var(--bg-container);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
}
.menu-btn:hover {
  background: var(--bg-container-high);
  color: var(--primary);
}

.chat-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

#headerTitle {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  cursor: pointer;
  max-width: 240px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#headerTitle:hover {
  color: var(--primary);
}

/* Model Switcher Pill (The Kinetic Centerpiece) */
.model-badge-wrap {
  position: relative;
}

.model-badge-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-container);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-full);
  color: var(--text-main);
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.15s;
}
.model-badge-btn:hover {
  border-color: var(--primary);
  box-shadow: 0 0 12px var(--primary-ambient);
}
.model-badge-btn .model-icon {
  color: var(--primary);
}
.model-badge-btn .model-chevron {
  font-size: 10px;
  color: var(--text-dim);
  transition: transform 0.15s;
}
.model-badge-wrap.open .model-chevron {
  transform: rotate(180deg);
}

.model-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 320px;
  background: var(--bg-container-high);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(24px);
  z-index: 150;
  flex-direction: column;
  gap: 4px;
}
.model-dropdown-menu.open {
  display: flex;
  animation: popIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.model-menu-header {
  font-family: var(--font-label);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  padding: 6px 10px 4px;
}

.model-menu-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  color: var(--text-main);
}
.model-menu-item:hover {
  background: var(--bg-container);
  border-color: var(--border-subtle);
}
.model-menu-item.active {
  background: rgba(78, 222, 163, 0.1);
  border-color: rgba(78, 222, 163, 0.3);
}
.model-item-title {
  font-size: 13.5px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}
.model-item-title i {
  color: var(--primary);
  font-size: 12px;
}
.model-item-desc {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Header Controls Right */
.controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle, .header-icon-btn {
  background: var(--bg-container);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.toggle:hover, .header-icon-btn:hover {
  background: var(--bg-container-high);
  color: var(--text-main);
}
.toggle.active {
  background: rgba(78, 222, 163, 0.12);
  color: var(--primary);
  border-color: rgba(78, 222, 163, 0.3);
}

.search-toggle-chip {
  width: auto;
  padding: 0 12px;
  gap: 6px;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.search-toggle-chip.active {
  background: rgba(78, 222, 163, 0.15);
  color: var(--primary);
  border-color: var(--primary);
}

.header-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 2px solid var(--primary);
  cursor: pointer;
  object-fit: cover;
}

/* ==========================================================================
   CHAT CONVERSATION CONTAINER
   ========================================================================== */
#chat {
  flex: 1;
  overflow-y: auto;
  padding: 28px 20px 140px;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Welcome Hero (Kinetic Monolith) */
.welcome-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin: auto 0;
  padding: 30px 16px;
  animation: fadeIn 0.3s ease-out;
}

.hero-brand-icon {
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--on-primary);
  font-size: 26px;
  margin-bottom: 18px;
  box-shadow: 0 0 35px var(--primary-glow);
}

.hero-title {
  font-family: var(--font-body);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  color: var(--text-main);
  margin-bottom: 6px;
}

.hero-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 460px;
  margin-bottom: 32px;
  line-height: 1.5;
}

.starter-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 720px;
}

.starter-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 16px 18px;
  background: var(--bg-container-low);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.starter-card:hover {
  background: var(--bg-container);
  border-color: rgba(78, 222, 163, 0.35);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}
.starter-card-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(78, 222, 163, 0.12);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  margin-bottom: 10px;
}
.starter-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}
.starter-card-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Chat Messages */
.msg {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  word-break: break-word;
  animation: slideUp 0.2s ease-out;
}

/* User Message Bubble */
.msg.user {
  align-self: flex-end;
  max-width: 82%;
  background: var(--bg-container-highest);
  color: var(--text-main);
  padding: 14px 18px;
  border-radius: 22px 22px 4px 22px;
  box-shadow: var(--shadow-sm);
  font-size: 15px;
  line-height: 1.55;
}

/* Bot Message Container */
.msg.bot {
  align-self: flex-start;
  width: 100%;
  background: rgba(16, 42, 32, 0.35);
  border: 1px solid rgba(78, 222, 163, 0.14);
  padding: 20px 24px;
  border-radius: 22px 22px 22px 4px;
  color: #f3f4f6;
  box-shadow: 0 0 35px rgba(78, 222, 163, 0.05);
  backdrop-filter: blur(12px);
  font-size: 15px;
  line-height: 1.68;
}

/* Bot Engine Header Pill */
.bot-engine-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 10px;
}
.bot-engine-badge i {
  font-size: 12px;
}

/* Markdown Styling inside Messages */
.msg.bot p { margin-bottom: 12px; }
.msg.bot p:last-child { margin-bottom: 0; }
.msg.bot h1, .msg.bot h2, .msg.bot h3 {
  font-weight: 700;
  color: #fff;
  margin: 16px 0 8px;
  letter-spacing: -0.02em;
}
.msg.bot h1 { font-size: 20px; }
.msg.bot h2 { font-size: 17px; }
.msg.bot h3 { font-size: 15px; }

.msg.bot ul, .msg.bot ol {
  margin: 8px 0 12px 20px;
}
.msg.bot li { margin-bottom: 4px; }

.msg.bot blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(78, 222, 163, 0.06);
  padding: 8px 14px;
  margin: 12px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-sub);
}

.msg.bot code:not(pre code) {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(78, 222, 163, 0.1);
  color: #6ee7b7;
  padding: 2px 6px;
  border-radius: 6px;
}

/* Syntax Highlighted Code Blocks */
.code-block-wrapper {
  position: relative;
  margin: 14px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-medium);
  background: #090c10;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #11141a;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 12px;
  color: var(--text-muted);
}
.code-header-lang {
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
}
.code-header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.code-action-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-sub);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
}
.code-action-btn:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}
.code-action-btn.canvas-preview-btn {
  background: rgba(78, 222, 163, 0.2);
  color: #a7f3d0;
  border-color: rgba(78, 222, 163, 0.4);
}
.code-action-btn.canvas-preview-btn:hover {
  background: var(--primary);
  color: var(--on-primary);
}

pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
}

/* Message Meta & Action Bar */
.msg-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  font-size: 11px;
  color: var(--text-dim);
}

.timestamp {
  font-family: var(--font-label);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.msg-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.msg-btn {
  background: var(--bg-container);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
}
.msg-btn:hover {
  background: var(--bg-container-high);
  color: var(--text-main);
}
.msg-btn.retry-btn:hover {
  color: var(--primary);
}
.msg-btn.continue-action-btn {
  background: rgba(78, 222, 163, 0.15);
  color: var(--primary);
  border-color: rgba(78, 222, 163, 0.3);
}

.msg-stats-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.03);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   THE COMMAND LINE (COMPOSER DOCK - STITCH DESIGN)
   ========================================================================== */
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0 20px 24px;
  pointer-events: none;
  z-index: 60;
  display: flex;
  justify-content: center;
}

.sidebar:not(.is-hidden) ~ .app footer {
  left: var(--sidebar-width);
}

.composer-box {
  pointer-events: auto;
  width: 100%;
  max-width: 820px;
  background: var(--glass-bg);
  backdrop-filter: blur(28px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.55);
  padding: 8px 12px 8px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.composer-box:focus-within {
  border-color: var(--primary-container);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65), 0 0 20px var(--primary-ambient);
}

/* Attachment Tray */
.attachment-tray {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 4px;
}
.attachment-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-container);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11.5px;
  color: var(--text-main);
}
.attachment-pill .remove-file {
  cursor: pointer;
  color: var(--text-dim);
}
.attachment-pill .remove-file:hover {
  color: #ef4444;
}

/* Composer Main Row: + Button, Textarea, Action Controls */
.composer-main-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.composer-circle-btn {
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: var(--radius-full);
  background: var(--bg-container-high);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
}
.composer-circle-btn:hover {
  background: var(--bg-container-highest);
  color: var(--primary);
  border-color: rgba(78, 222, 163, 0.3);
}
.composer-circle-btn.recording {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border-color: #ef4444;
  animation: pulse 1.5s infinite;
}

/* Textarea Input */
#input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 14.5px;
  font-family: var(--font-body);
  line-height: 1.5;
  resize: none;
  min-height: 40px;
  max-height: 160px;
  padding: 8px 4px;
  box-sizing: border-box;
}
#input::placeholder {
  color: var(--text-dim);
}

/* Composer Actions Row Right */
.composer-actions-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.composer-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-container);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-family: var(--font-label);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.composer-pill:hover {
  background: var(--bg-container-high);
  color: var(--text-main);
  border-color: var(--border-medium);
}

.composer-pill.enhancer-pill {
  background: rgba(78, 222, 163, 0.08);
  color: var(--primary);
  border-color: rgba(78, 222, 163, 0.25);
}
.composer-pill.enhancer-pill:hover {
  background: rgba(78, 222, 163, 0.18);
  box-shadow: 0 0 12px rgba(78, 222, 163, 0.3);
}

.composer-pill.search-pill.active {
  background: rgba(78, 222, 163, 0.15);
  color: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 12px rgba(78, 222, 163, 0.25);
}

/* Send & Stop Buttons */
.send-cluster {
  display: flex;
  align-items: center;
  gap: 6px;
}

.send-btn, button.send {
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  border: none;
  color: var(--on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 0 16px var(--primary-glow);
  transition: all 0.15s;
}
.send-btn:hover, button.send:hover {
  transform: scale(1.05);
  box-shadow: 0 0 24px rgba(78, 222, 163, 0.6);
}
.send-btn:active, button.send:active {
  transform: scale(0.95);
}

.stop-btn {
  background: rgba(239, 68, 68, 0.2);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #ef4444;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-label);
  text-transform: uppercase;
  cursor: pointer;
}
.stop-btn.hidden {
  display: none !important;
}

/* Composer Sub Row (Character counter without overlapping) */
.composer-sub-row {
  display: flex;
  justify-content: flex-end;
  padding: 0 6px;
}
.char-counter {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}

/* Scroll to Bottom Button */
.scroll-bottom {
  position: fixed;
  bottom: 105px;
  right: 28px;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: var(--bg-container-high);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  z-index: 55;
  transition: all 0.15s;
  opacity: 0;
  pointer-events: none;
}
.scroll-bottom.visible {
  opacity: 1;
  pointer-events: auto;
}

/* ==========================================================================
   LIVE ARTIFACT & CODE CANVAS PANEL
   ========================================================================== */
.artifact-canvas {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 48vw;
  max-width: 720px;
  min-width: 380px;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  display: flex;
  flex-direction: column;
  transform: translateX(105%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.artifact-canvas.open {
  transform: translateX(0);
}

.canvas-header {
  height: var(--header-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-container-low);
}

.canvas-title {
  font-family: var(--font-label);
  font-size: 13.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
}
.canvas-title i {
  color: var(--primary);
}

.canvas-tabs {
  display: flex;
  background: var(--bg-container);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2px;
}
.canvas-tab {
  padding: 5px 12px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}
.canvas-tab.active {
  background: var(--bg-container-high);
  color: var(--primary);
}

.canvas-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}
.canvas-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}
.canvas-btn:hover {
  background: var(--bg-container);
  color: var(--text-main);
}

.canvas-body {
  flex: 1;
  position: relative;
  background: #ffffff;
  overflow: hidden;
}
#canvasIframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #fff;
}
.canvas-code-view {
  width: 100%;
  height: 100%;
  overflow: auto;
  background: #090c10;
  padding: 16px;
}

/* ==========================================================================
   MODALS, PANELS & POPUPS
   ========================================================================== */
.memory-panel, .skills-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: min(92vw, 540px);
  max-height: 80vh;
  background: var(--bg-container-high);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 300;
  display: none;
  flex-direction: column;
  backdrop-filter: blur(28px);
}
.memory-panel.visible, .skills-panel.visible {
  display: flex;
  transform: translate(-50%, -50%) scale(1);
  animation: popIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.memory-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 290;
}
.memory-overlay.visible { display: block; }

.memory-panel-header {
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}
.memory-panel-header h3 {
  font-family: var(--font-label);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.memory-panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.memory-panel-actions button {
  background: var(--bg-container);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-label);
  text-transform: uppercase;
  cursor: pointer;
}
.memory-panel-actions button.danger {
  color: #ef4444;
}

.memory-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 480px;
}

.memory-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-container-low);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 13.5px;
}

/* App Alert / Confirmation Dialogs */
.app-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 400;
}
.app-modal-overlay.visible { display: block; }

.app-modal {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(90vw, 420px);
  background: var(--bg-container-high);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  z-index: 410;
  flex-direction: column;
  gap: 16px;
}
.app-modal.visible {
  display: flex;
  animation: popIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.app-modal-header {
  font-family: var(--font-label);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}
.app-modal-body {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.5;
}
.app-modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}
.app-modal-btn {
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-label);
  border: 1px solid var(--border-medium);
  background: var(--bg-container);
  color: var(--text-main);
  cursor: pointer;
}
.app-modal-btn.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-container) 100%);
  border: none;
  color: var(--on-primary);
  font-weight: 700;
}

/* Status Notifications */
.status-banner {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--glass-bg);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-md);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-family: var(--font-label);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
  z-index: 1000;
  backdrop-filter: blur(20px);
  animation: slideDown 0.2s ease-out;
}

/* Keyframe Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translate(-50%, -12px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}
@keyframes popIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Thinking Details Block (DeepSeek style) */
.thinking-block {
  background: rgba(255, 255, 255, 0.02);
  border-left: 3px solid var(--primary);
  border-radius: 6px;
  margin: 12px 0;
  padding: 10px 14px;
  font-size: 0.9em;
  color: var(--text-muted);
}
.thinking-summary {
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}
.thinking-summary:hover { color: var(--text-main); }
.thinking-content {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  line-height: 1.6;
}

/* ==========================================================================
   RESPONSIVE (MOBILE & TABLET)
   ========================================================================== */
@media (max-width: 900px) {
  .artifact-canvas {
    width: 100vw;
    max-width: 100vw;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }
  .sidebar:not(.is-hidden) {
    transform: translateX(0);
  }
  .sidebar-overlay.active {
    display: block;
  }
  .menu-close-btn {
    display: block;
  }
  
  .sidebar:not(.is-hidden) ~ .app footer, footer {
    left: 0;
  }

  header {
    padding: 0 16px;
  }

  #chat {
    padding: 20px 14px 140px;
  }

  .starter-grid {
    grid-template-columns: 1fr;
  }

  .msg.user {
    max-width: 90%;
  }

  .model-badge-btn .model-name {
    max-width: 110px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .composer-box {
    border-radius: var(--radius-lg);
    padding: 8px 10px;
  }

  .composer-actions-row .composer-pill span {
    display: none;
  }
}