/* ==========================================================================
   Natural AI Assistant • Modern AI Cyberpunk / Aurora Design System
   ========================================================================== */

:root {
  /* Core Color Palette */
  --bg-primary: #080914;
  --bg-secondary: #0e1224;
  --bg-surface: rgba(18, 23, 44, 0.7);
  --bg-surface-hover: rgba(28, 35, 65, 0.85);
  --bg-surface-active: rgba(38, 47, 85, 0.95);
  
  /* Vibrant Accent Gradients */
  --accent-primary: #8b5cf6;
  --accent-primary-hover: #7c3aed;
  --accent-secondary: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  
  --grad-ai: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --grad-cyan: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --grad-emerald: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --grad-amber: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --grad-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.01) 100%);
  --grad-glow: radial-gradient(circle, rgba(139, 92, 246, 0.25) 0%, rgba(6, 182, 212, 0.05) 70%, transparent 100%);

  /* Borders & Glassmorphism */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(139, 92, 246, 0.5);
  --border-highlight: rgba(255, 255, 255, 0.15);
  --glass-blur: blur(20px);
  --glass-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6), 0 0 20px -5px rgba(139, 92, 246, 0.15);

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-code: #38bdf8;

  /* Fonts */
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: "Outfit", var(--font-sans);
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  /* Transitions */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 150ms;
  --dur-normal: 250ms;
  --dur-slow: 400ms;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(139, 92, 246, 0.4);
}

/* ==========================================================================
   Ambient Dynamic Background
   ========================================================================== */

.ambient-background {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  mix-blend-mode: screen;
  will-change: transform;
}

.orb-1 {
  top: -10%;
  left: 20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #6366f1 0%, #8b5cf6 60%, transparent 80%);
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.orb-2 {
  bottom: -15%;
  right: 15%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, #06b6d4 0%, #3b82f6 50%, transparent 80%);
  animation: floatOrb 22s ease-in-out infinite alternate-reverse;
}

.orb-3 {
  top: 40%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #ec4899 0%, #8b5cf6 50%, transparent 80%);
  animation: floatOrb 26s ease-in-out infinite alternate;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 90%);
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -60px) scale(1.1); }
  100% { transform: translate(-50px, 40px) scale(0.95); }
}

/* ==========================================================================
   Glass Cards & Common UI Elements
   ========================================================================== */

.glass-card {
  background: var(--bg-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
}

.gradient-text {
  background: var(--grad-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* ==========================================================================
   Button Ripple & Tactile Transition Engine
   ========================================================================== */

.ripple-btn {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border: none;
  outline: none;
  font-family: inherit;
  transition: transform var(--dur-fast) var(--ease-spring),
              background var(--dur-normal) var(--ease-smooth),
              box-shadow var(--dur-normal) var(--ease-smooth),
              border-color var(--dur-normal) var(--ease-smooth);
}

.ripple-btn:active {
  transform: scale(0.95) translateY(1px);
}

.ripple-wave {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: rippleAnimation 600ms linear;
  background: rgba(255, 255, 255, 0.35);
  pointer-events: none;
}

@keyframes rippleAnimation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ==========================================================================
   App Layout
   ========================================================================== */

.app-layout {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 1300px;
  margin: 0 auto;
  padding: 14px 20px;
  gap: 14px;
}

/* ==========================================================================
   Header / Navbar
   ========================================================================== */

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  height: 64px;
  flex-shrink: 0;
  border-radius: 18px;
}

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

.brand-badge {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-avatar {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--grad-ai);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.5);
}

.avatar-glow {
  position: absolute;
  inset: -2px;
  border-radius: 14px;
  background: var(--grad-ai);
  filter: blur(8px);
  opacity: 0.6;
  z-index: -1;
  animation: pulseGlow 3s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
  0% { opacity: 0.4; transform: scale(0.95); }
  100% { opacity: 0.8; transform: scale(1.05); }
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-subtitle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* Capsule Architecture Badge in Navbar */
.pipeline-capsule {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
}

.capsule-step {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--text-secondary);
}

.capsule-step i {
  color: var(--accent-primary);
  font-size: 1rem;
}

.capsule-arrow {
  color: var(--text-muted);
  font-size: 0.75rem;
}

/* Navbar Right Buttons */
.navbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.model-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.25);
  color: #c4b5fd;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-highlight);
  color: white;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   Chat Workspace
   ========================================================================== */

.chat-workspace {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 18px;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  scroll-behavior: smooth;
}

/* ==========================================================================
   Welcome Hero Banner
   ========================================================================== */

.welcome-hero {
  max-width: 780px;
  margin: auto auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 10px;
  animation: fadeIn 600ms var(--ease-smooth);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #c4b5fd;
  margin-bottom: 18px;
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
}

.hero-heading {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 620px;
  margin-bottom: 30px;
}

/* Prompt Chips Grid */
.prompt-chips-wrapper {
  width: 100%;
}

.prompt-chips-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.prompt-chips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.prompt-chip {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 14px 16px;
  text-align: left;
  transition: all var(--dur-normal) var(--ease-spring);
}

.prompt-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 0 20px rgba(139, 92, 246, 0.2);
}

.chip-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.math-icon { background: rgba(6, 182, 212, 0.15); color: #22d3ee; border: 1px solid rgba(6, 182, 212, 0.3); }
.sec-icon { background: rgba(236, 72, 153, 0.15); color: #f472b6; border: 1px solid rgba(236, 72, 153, 0.3); }
.time-icon { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }

.chip-content {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chip-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}

.chip-query {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   Message List & Bubbles
   ========================================================================== */

.messages-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
}

.message-row {
  display: flex;
  gap: 14px;
  animation: slideUpMessage 350ms var(--ease-smooth);
}

@keyframes slideUpMessage {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.bot-avatar {
  background: var(--grad-ai);
  color: white;
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.4);
}

.user-avatar {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  color: white;
}

.message-body {
  display: flex;
  flex-direction: column;
  max-width: 82%;
  gap: 8px;
}

.user-row .message-body {
  align-items: flex-end;
}

/* Bubble Styling */
.user-bubble {
  background: linear-gradient(135deg, #4338ca 0%, #3b82f6 100%);
  color: #ffffff;
  padding: 14px 18px;
  border-radius: 18px 18px 4px 18px;
  font-size: 0.98rem;
  line-height: 1.5;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.25);
  word-break: break-word;
}

.bot-bubble {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 16px 20px;
  border-radius: 18px 18px 18px 4px;
  font-size: 0.98rem;
  line-height: 1.6;
  box-shadow: var(--glass-shadow);
  word-break: break-word;
}

.bot-bubble p:not(:last-child) {
  margin-bottom: 10px;
}

.message-timestamp {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ==========================================================================
   AI Execution Pipeline Visualizer Card
   ========================================================================== */

.pipeline-card {
  background: rgba(15, 20, 38, 0.85);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 8px;
  font-size: 0.85rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.pipeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(139, 92, 246, 0.08);
  border-bottom: 1px solid rgba(139, 92, 246, 0.15);
  cursor: pointer;
  user-select: none;
  transition: background var(--dur-fast);
}

.pipeline-header:hover {
  background: rgba(139, 92, 246, 0.15);
}

.pipeline-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: #c4b5fd;
}

.pipeline-metrics {
  display: flex;
  align-items: center;
  gap: 10px;
}

.metric-pill {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.metric-pill.success {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.chevron-icon {
  transition: transform var(--dur-normal) var(--ease-spring);
  color: #c4b5fd;
}

.pipeline-card.collapsed .chevron-icon {
  transform: rotate(-90deg);
}

.pipeline-card.collapsed .pipeline-body {
  display: none;
}

.pipeline-body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: fadeIn 200ms ease;
}

.pipeline-step-node {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.node-bullet {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.bullet-planner { background: rgba(139, 92, 246, 0.2); color: #c4b5fd; border: 1px solid rgba(139, 92, 246, 0.4); }
.bullet-tool { background: rgba(6, 182, 212, 0.2); color: #67e8f9; border: 1px solid rgba(6, 182, 212, 0.4); }
.bullet-assistant { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.4); }

.node-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.node-title {
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-primary);
}

.node-code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  padding: 6px 10px;
  color: #38bdf8;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Action row below bot messages */
.bot-actions-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}

.msg-action-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: all var(--dur-fast);
}

.msg-action-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

/* ==========================================================================
   Thinking Indicator Wave
   ========================================================================== */

.thinking-bubble-wrapper {
  display: flex;
  gap: 14px;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  animation: fadeIn 300ms ease;
}

.bot-avatar-pulse {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--grad-ai);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  animation: pulseGlow 1.5s infinite alternate;
}

.thinking-card {
  padding: 14px 18px;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.thinking-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.thinking-step-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: #c4b5fd;
}

.pulsing-wave {
  display: flex;
  align-items: center;
  gap: 4px;
}

.pulsing-wave span {
  width: 4px;
  height: 16px;
  border-radius: 4px;
  background: var(--accent-primary);
  animation: waveBar 1.2s ease-in-out infinite;
}

.pulsing-wave span:nth-child(2) { animation-delay: 0.15s; background: var(--accent-secondary); }
.pulsing-wave span:nth-child(3) { animation-delay: 0.3s; background: var(--accent-emerald); }
.pulsing-wave span:nth-child(4) { animation-delay: 0.45s; background: var(--accent-rose); }

@keyframes waveBar {
  0%, 100% { transform: scaleY(0.3); opacity: 0.4; }
  50% { transform: scaleY(1.2); opacity: 1; }
}

.thinking-progress-bar {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 40%;
  background: var(--grad-ai);
  border-radius: 999px;
  animation: indeterminateBar 1.8s ease-in-out infinite;
}

@keyframes indeterminateBar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(300%); }
}

/* ==========================================================================
   Bottom Input Dock
   ========================================================================== */

.input-dock-container {
  flex-shrink: 0;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding-bottom: 4px;
}

.input-dock {
  padding: 12px 16px;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 15px 35px -10px rgba(0, 0, 0, 0.6), 0 0 25px rgba(139, 92, 246, 0.12);
}

.input-pills-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.mini-pill {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 500;
  white-space: nowrap;
  transition: all var(--dur-fast);
}

.mini-pill:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-1px);
}

.chat-form {
  display: flex;
  align-items: center;
  gap: 12px;
}

.input-wrapper {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 4px 12px;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}

.input-wrapper:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.25);
}

#userInput {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  resize: none;
  padding: 8px 4px;
  max-height: 120px;
  min-height: 24px;
  line-height: 1.5;
}

#userInput::placeholder {
  color: var(--text-muted);
}

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

.action-circle-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-muted);
  transition: all var(--dur-fast);
}

.action-circle-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

/* Vibrant Animated Send Button */
.send-btn {
  position: relative;
  height: 44px;
  padding: 0 20px;
  border-radius: 12px;
  background: var(--grad-ai);
  color: white;
  font-weight: 600;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.send-btn:hover {
  box-shadow: 0 6px 25px rgba(139, 92, 246, 0.6);
  transform: translateY(-1px);
}

.send-btn-content {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
  z-index: 2;
}

.send-icon {
  font-size: 1.1rem;
  transition: transform var(--dur-fast) var(--ease-spring);
}

.send-btn:hover .send-icon {
  transform: translateX(3px) translateY(-2px);
}

.send-btn-glow {
  position: absolute;
  inset: -2px;
  border-radius: 14px;
  background: var(--grad-ai);
  filter: blur(8px);
  opacity: 0;
  transition: opacity var(--dur-normal);
  z-index: 1;
}

.send-btn:hover .send-btn-glow {
  opacity: 0.6;
}

.input-footer-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.input-footer-meta kbd {
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.meta-separator {
  color: rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   Tool Drawer & Playground
   ========================================================================== */

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-normal) var(--ease-smooth);
}

.drawer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 480px;
  max-width: 95vw;
  background: #0d1124;
  border-left: 1px solid var(--border-subtle);
  border-radius: 20px 0 0 20px;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-spring);
  box-shadow: -15px 0 40px rgba(0, 0, 0, 0.7);
}

.drawer-overlay.active .drawer-panel {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.drawer-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.drawer-title-icon {
  font-size: 1.8rem;
  color: var(--accent-secondary);
}

.drawer-title h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
}

.drawer-title p {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.close-drawer-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.close-drawer-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Tool Cards */
.tool-cards-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tool-info-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 16px;
  transition: all var(--dur-normal);
}

.tool-info-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(139, 92, 246, 0.3);
}

.tool-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.tool-name-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.tool-cat-badge {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(139, 92, 246, 0.15);
  color: #c4b5fd;
  font-weight: 600;
}

.tool-card-desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 10px;
}

.tool-param-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(0, 0, 0, 0.3);
  padding: 8px 12px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-code);
}

/* Direct Playground Runner */
.playground-section {
  padding: 18px;
  border-radius: 16px;
  border: 1px solid rgba(6, 182, 212, 0.3);
  background: rgba(6, 182, 212, 0.04);
}

.playground-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--accent-secondary);
  font-weight: 700;
  font-size: 0.95rem;
}

.playground-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.playground-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-select, .form-input {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 8px 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
}

.form-select:focus, .form-input:focus {
  border-color: var(--accent-secondary);
}

.playground-run-btn {
  background: var(--grad-cyan);
  color: white;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.88rem;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.playground-run-btn:hover {
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
}

.playground-output-container {
  margin-top: 14px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  overflow: hidden;
}

.playground-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.74rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.exec-latency {
  font-family: var(--font-mono);
  color: var(--accent-emerald);
}

.playground-output-pre {
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #a5f3fc;
  white-space: pre-wrap;
  max-height: 180px;
  overflow-y: auto;
}

/* ==========================================================================
   Architecture & About Modal
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-normal) var(--ease-smooth);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  max-width: 620px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: 20px;
  padding: 24px;
  transform: scale(0.92);
  transition: transform var(--dur-normal) var(--ease-spring);
}

.modal-backdrop.active .modal-dialog {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--grad-ai);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.modal-close-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.modal-close-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: white;
}

.diagram-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-bottom: 20px;
}

.flow-card {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 12px 16px;
}

.flow-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  margin-bottom: 4px;
  text-transform: uppercase;
}

.user-badge { background: rgba(59, 130, 246, 0.2); color: #93c5fd; }
.planner-badge { background: rgba(139, 92, 246, 0.2); color: #c4b5fd; }
.tool-badge { background: rgba(6, 182, 212, 0.2); color: #67e8f9; }
.assistant-badge { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }

.flow-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.flow-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.flow-connector {
  color: var(--text-muted);
  font-size: 1rem;
}

.deployment-notes {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 12px;
  padding: 14px 18px;
}

.deployment-notes h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #34d399;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.deployment-notes p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
  pointer-events: none;
}

.toast {
  background: rgba(15, 20, 38, 0.95);
  backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  color: white;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideInToast 300ms var(--ease-spring);
  pointer-events: auto;
}

.toast.success { border-color: rgba(16, 185, 129, 0.4); }
.toast.error { border-color: rgba(244, 63, 94, 0.4); }

@keyframes slideInToast {
  from { opacity: 0; transform: translateY(20px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ==========================================================================
   Utilities & Responsive Breakpoints
   ========================================================================== */

.hidden {
  display: none !important;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 768px) {
  .app-layout {
    padding: 8px;
    gap: 8px;
  }
  
  .hide-on-mobile {
    display: none !important;
  }

  .navbar {
    padding: 8px 12px;
    height: 56px;
  }

  .prompt-chips-grid {
    grid-template-columns: 1fr;
  }

  .hero-heading {
    font-size: 1.6rem;
  }

  .hero-description {
    font-size: 0.9rem;
  }

  .message-body {
    max-width: 90%;
  }

  .input-dock {
    padding: 10px 12px;
  }
}