/* ============================================
   AWS Cost Agent - Enterprise Design System
   Inspired by Linear, Stripe, Raycast
   ============================================ */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Brand Colors - Emerald for primary actions */
  --color-primary: #10B981;
  --color-primary-hover: #059669;
  --color-primary-light: #D1FAE5;
  --color-primary-subtle: #ECFDF5;

  /* Neutral Palette - Slate-based */
  --color-gray-50: #F8FAFC;
  --color-gray-100: #F1F5F9;
  --color-gray-200: #E2E8F0;
  --color-gray-300: #CBD5E1;
  --color-gray-400: #94A3B8;
  --color-gray-500: #64748B;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;
  --color-gray-900: #0F172A;

  /* Semantic Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;

  /* Surface Colors */
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-background: #F8FAFC;
  --color-background-subtle: #F1F5F9;

  /* Border Colors */
  --color-border: #E2E8F0;
  --color-border-subtle: #F1F5F9;
  --color-border-focus: #10B981;

  /* Shadow System */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.06), 0 4px 6px -2px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 10px 10px -5px rgba(15, 23, 42, 0.02);

  /* Focus Ring */
  --focus-ring: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-primary);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Letter Spacing */
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --duration-fast: 100ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --color-primary: #34D399;
  --color-primary-hover: #10B981;
  --color-primary-light: #064E3B;
  --color-primary-subtle: #022C22;

  --color-gray-50: #020617;
  --color-gray-100: #0F172A;
  --color-gray-200: #1E293B;
  --color-gray-300: #334155;
  --color-gray-400: #475569;
  --color-gray-500: #64748B;
  --color-gray-600: #94A3B8;
  --color-gray-700: #CBD5E1;
  --color-gray-800: #E2E8F0;
  --color-gray-900: #F1F5F9;

  --color-success: #34D399;
  --color-warning: #FBBF24;
  --color-error: #F87171;
  --color-info: #60A5FA;

  --color-surface: #1E293B;
  --color-surface-elevated: #334155;
  --color-background: #0F172A;
  --color-background-subtle: #1E293B;

  --color-border: #334155;
  --color-border-subtle: #1E293B;
  --color-border-focus: #34D399;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

/* ===== 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;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-700);
  background: var(--color-background);
  min-height: 100vh;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-gray-900);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
}

h1 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  letter-spacing: var(--tracking-tight);
}

h2 {
  font-size: var(--text-2xl);
  letter-spacing: var(--tracking-tight);
}

h3 {
  font-size: var(--text-lg);
}

p {
  margin-bottom: var(--spacing-4);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-primary-hover);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-gray-100);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--color-gray-800);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

/* Primary Button */
.btn-primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* Secondary Button */
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-gray-700);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
  color: var(--color-gray-900);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--color-gray-600);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

/* Danger Button */
.btn-danger {
  background: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background: #DC2626;
  border-color: #DC2626;
}

/* Button Sizes */
.btn-sm {
  padding: 6px 12px;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 12px 24px;
  font-size: var(--text-base);
}

.btn-icon {
  padding: 8px;
  width: 36px;
  height: 36px;
}

.btn-icon-sm {
  padding: 6px;
  width: 28px;
  height: 28px;
}

/* ===== CARDS ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.card-elevated {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card-body {
  padding: var(--spacing-6);
}

/* Feature Card */
.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  transition: all var(--duration-normal) var(--ease-out);
}

.feature-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-card .icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-subtle);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-4);
  font-size: 24px;
}

.feature-card h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: 0;
  line-height: var(--leading-relaxed);
}

/* ===== FORM INPUTS ===== */
.form-group {
  margin-bottom: var(--spacing-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2);
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-gray-900);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-fast) var(--ease-out);
}

.form-input:hover:not(:focus):not(:disabled) {
  border-color: var(--color-gray-300);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input:disabled {
  background: var(--color-gray-100);
  color: var(--color-gray-400);
  cursor: not-allowed;
}

.form-input::placeholder {
  color: var(--color-gray-400);
}

.form-input-mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.form-helper {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-top: var(--spacing-2);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--spacing-2);
}

/* ===== STATUS INDICATORS ===== */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
}

.status-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-success {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}

.status-success .status-badge-dot {
  background: var(--color-primary);
}

.status-warning {
  background: #FEF3C7;
  color: #B45309;
}

[data-theme="dark"] .status-warning {
  background: #422006;
  color: #FBBF24;
}

.status-warning .status-badge-dot {
  background: var(--color-warning);
}

.status-error {
  background: #FEE2E2;
  color: #B91C1C;
}

[data-theme="dark"] .status-error {
  background: #450A0A;
  color: #F87171;
}

.status-error .status-badge-dot {
  background: var(--color-error);
}

.status-pending {
  background: #DBEAFE;
  color: #1D4ED8;
}

[data-theme="dark"] .status-pending {
  background: #172554;
  color: #60A5FA;
}

.status-pending .status-badge-dot {
  background: var(--color-info);
  animation: pulse 2s infinite;
}

/* ===== NAVIGATION ===== */
.nav-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--spacing-6);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  text-decoration: none;
}

.nav-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

.nav-brand-text {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.nav-link {
  padding: 8px 16px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-600);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-link:hover {
  color: var(--color-gray-900);
  background: var(--color-gray-100);
}

.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

/* Theme Toggle */
.theme-toggle {
  background: transparent;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--color-gray-500);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-gray-900);
  background: var(--color-gray-100);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* ===== LANDING PAGE ===== */
.landing-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-8) var(--spacing-6);
}

.hero {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-10) var(--spacing-8);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.hero h1 {
  font-size: var(--text-5xl);
  margin-bottom: var(--spacing-4);
  text-align: center;
  color: var(--color-gray-900);
}

.subtitle {
  font-size: var(--text-xl);
  text-align: center;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-12);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-6);
  margin: var(--spacing-12) 0;
}

.cta {
  text-align: center;
  margin: var(--spacing-12) 0;
}

.cta .btn {
  padding: 14px 32px;
  font-size: var(--text-base);
}

.note {
  margin-top: var(--spacing-4);
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

.info-section {
  margin: var(--spacing-12) 0;
  padding: var(--spacing-8);
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
}

.info-section h2 {
  text-align: center;
  margin-bottom: var(--spacing-8);
  color: var(--color-gray-900);
}

.steps {
  list-style: none;
  counter-reset: step-counter;
  max-width: 600px;
  margin: 0 auto;
}

.steps li {
  counter-increment: step-counter;
  margin: var(--spacing-5) 0;
  padding-left: 60px;
  position: relative;
  color: var(--color-gray-600);
}

.steps li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: -2px;
  background: var(--color-primary);
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
}

.steps li strong {
  color: var(--color-gray-900);
}

.example-queries {
  margin: var(--spacing-10) 0;
  text-align: center;
}

.example-queries h3 {
  margin-bottom: var(--spacing-5);
  color: var(--color-gray-900);
}

.query-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  max-width: 700px;
  margin: 0 auto;
}

.query-list code {
  display: block;
  background: var(--color-gray-50);
  padding: var(--spacing-3) var(--spacing-5);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-primary);
  text-align: left;
  font-size: var(--text-sm);
  color: var(--color-gray-700);
}

footer {
  text-align: center;
  margin-top: var(--spacing-10);
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

footer a {
  color: var(--color-primary);
}

/* ===== LOGIN PAGE ===== */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--spacing-6);
}

.login-box {
  background: var(--color-surface);
  padding: var(--spacing-10) var(--spacing-8);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  max-width: 440px;
  width: 100%;
  text-align: center;
}

.login-box h1 {
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-2);
  color: var(--color-gray-900);
}

.login-box > p {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-8);
}

.login-options {
  margin: var(--spacing-6) 0;
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3);
  background: var(--color-surface);
  color: var(--color-gray-700);
  border: 1px solid var(--color-border);
  padding: 12px var(--spacing-6);
  width: 100%;
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-google:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
}

.btn-google svg {
  flex-shrink: 0;
}

.security-note {
  margin-top: var(--spacing-6);
  padding: var(--spacing-4);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-lg);
}

.security-note p {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  margin: 0;
}

.back-link {
  margin-top: var(--spacing-6);
  font-size: var(--text-sm);
}

.back-link a {
  color: var(--color-gray-500);
}

.back-link a:hover {
  color: var(--color-primary);
}

/* ===== CHAT INTERFACE ===== */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 1600px;
  margin: 0 auto;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.header-left h1 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
}

.user-email {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  padding-left: var(--spacing-3);
  border-left: 1px solid var(--color-border);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.btn-logout {
  background: transparent;
  color: var(--color-gray-600);
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-logout:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-300);
  color: var(--color-gray-900);
}

.chat-main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-section {
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-border-subtle);
}

.sidebar-section:last-child {
  border-bottom: none;
}

.sidebar-section h3 {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--spacing-3);
}

.sidebar-description {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-3);
}

/* Threads */
.threads-section {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-4);
}

.threads-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-3);
}

.threads-header h3 {
  margin-bottom: 0;
}

.btn-new-thread {
  background: var(--color-primary);
  color: white;
  border: none;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-new-thread:hover {
  background: var(--color-primary-hover);
}

.threads-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 200px;
  overflow-y: auto;
}

.thread-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.thread-item:hover {
  background: var(--color-gray-100);
}

.thread-item.active {
  background: var(--color-primary-subtle);
  border-color: var(--color-primary-light);
}

.thread-title {
  flex: 1;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: var(--spacing-2);
}

.thread-item.active .thread-title {
  color: var(--color-primary);
}

.thread-delete {
  background: none;
  border: none;
  color: var(--color-gray-400);
  cursor: pointer;
  font-size: var(--text-lg);
  padding: 0 4px;
  opacity: 0;
  transition: all var(--duration-fast) var(--ease-out);
}

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

.thread-delete:hover {
  color: var(--color-error);
}

.no-threads {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-align: center;
  padding: var(--spacing-4);
}

/* Quick Questions */
.quick-question {
  display: block;
  width: 100%;
  padding: 10px 12px;
  text-align: left;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  background: var(--color-gray-50);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  margin-bottom: var(--spacing-2);
}

.quick-question:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
  color: var(--color-gray-900);
}

/* Tool List */
.tool-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.tool-item {
  padding: var(--spacing-3);
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
}

.tool-item strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-900);
  margin-bottom: 4px;
}

.tool-item p {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin: 0;
}

.tool-item.coming-soon {
  opacity: 0.6;
}

.badge {
  display: inline-block;
  background: var(--color-warning);
  color: var(--color-gray-900);
  font-size: 10px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-top: var(--spacing-2);
  font-weight: var(--font-semibold);
}

/* Discovery Status */
.discovery-status {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: var(--spacing-3);
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-3);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-indicator.not_started { background: var(--color-gray-300); }
.status-indicator.pending { background: var(--color-warning); }
.status-indicator.in_progress {
  background: var(--color-info);
  animation: pulse 1.5s infinite;
}
.status-indicator.completed { background: var(--color-success); }
.status-indicator.failed { background: var(--color-error); }

.btn-discovery {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  width: 100%;
  background: var(--color-primary);
  color: white;
  border: none;
  padding: 10px var(--spacing-4);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-discovery:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-discovery:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.discovery-error {
  margin-top: var(--spacing-3);
  padding: var(--spacing-3);
  background: #FEE2E2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-lg);
  color: #B91C1C;
  font-size: var(--text-sm);
}

[data-theme="dark"] .discovery-error {
  background: #450A0A;
  border-color: #7F1D1D;
  color: #FCA5A5;
}

/* Chat Content */
.chat-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.messages {
  flex: 1;
  padding: var(--spacing-6);
  overflow-y: auto;
  background: var(--color-background);
}

.welcome-message {
  background: var(--color-surface);
  padding: var(--spacing-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  max-width: 640px;
}

.welcome-message h2 {
  margin-bottom: var(--spacing-4);
  color: var(--color-gray-900);
  font-size: var(--text-xl);
}

.welcome-message p {
  color: var(--color-gray-600);
}

.welcome-message ul {
  margin: var(--spacing-4) 0 var(--spacing-4) var(--spacing-6);
}

.welcome-message li {
  margin: var(--spacing-2) 0;
  color: var(--color-gray-600);
}

.welcome-message strong {
  color: var(--color-gray-900);
}

/* Messages */
.message {
  margin-bottom: var(--spacing-4);
  display: flex;
  flex-direction: column;
  animation: fadeIn var(--duration-normal) var(--ease-out);
}

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

.message.assistant {
  align-items: flex-start;
}

.message-bubble {
  max-width: 70%;
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-xl);
  word-wrap: break-word;
}

.message.user .message-bubble {
  background: var(--color-primary);
  color: white;
  border-bottom-right-radius: var(--radius-sm);
  white-space: pre-wrap;
}

.message.assistant .message-bubble {
  background: var(--color-surface);
  color: var(--color-gray-800);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: var(--shadow-xs);
}

.message-time {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-top: var(--spacing-1);
}

/* Markdown in Assistant Messages */
.message.assistant .message-bubble h1,
.message.assistant .message-bubble h2,
.message.assistant .message-bubble h3,
.message.assistant .message-bubble h4,
.message.assistant .message-bubble h5,
.message.assistant .message-bubble h6 {
  margin-top: var(--spacing-5);
  margin-bottom: var(--spacing-3);
  color: var(--color-gray-900);
  font-weight: var(--font-semibold);
}

.message.assistant .message-bubble h1 { font-size: var(--text-xl); }
.message.assistant .message-bubble h2 { font-size: var(--text-lg); }
.message.assistant .message-bubble h3 { font-size: var(--text-base); font-weight: var(--font-semibold); }
.message.assistant .message-bubble h4 { font-size: var(--text-sm); }

.message.assistant .message-bubble h1:first-child,
.message.assistant .message-bubble h2:first-child,
.message.assistant .message-bubble h3:first-child {
  margin-top: 0;
}

.message.assistant .message-bubble p {
  margin: var(--spacing-3) 0;
  line-height: var(--leading-relaxed);
}

.message.assistant .message-bubble ul,
.message.assistant .message-bubble ol {
  margin: var(--spacing-3) 0;
  padding-left: var(--spacing-6);
}

.message.assistant .message-bubble li {
  margin: var(--spacing-2) 0;
  line-height: var(--leading-normal);
}

.message.assistant .message-bubble code {
  background: var(--color-gray-100);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-gray-800);
}

.message.assistant .message-bubble pre {
  background: var(--color-gray-100);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-3);
  overflow-x: auto;
  margin: var(--spacing-3) 0;
}

.message.assistant .message-bubble pre code {
  background: none;
  padding: 0;
  color: var(--color-gray-800);
  font-size: var(--text-sm);
}

.message.assistant .message-bubble blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--spacing-4);
  margin: var(--spacing-3) 0;
  color: var(--color-gray-600);
  font-style: italic;
}

.message.assistant .message-bubble table {
  border-collapse: collapse;
  width: 100%;
  margin: var(--spacing-4) 0;
  font-size: var(--text-sm);
}

.message.assistant .message-bubble th,
.message.assistant .message-bubble td {
  border: 1px solid var(--color-border);
  padding: var(--spacing-2) var(--spacing-3);
  text-align: left;
}

.message.assistant .message-bubble th {
  background: var(--color-gray-50);
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
}

.message.assistant .message-bubble tr:nth-child(even) {
  background: var(--color-gray-50);
}

.message.assistant .message-bubble a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-fast) var(--ease-out);
}

.message.assistant .message-bubble a:hover {
  border-bottom-color: var(--color-primary);
}

.message.assistant .message-bubble hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-5) 0;
}

.message.assistant .message-bubble strong {
  font-weight: var(--font-semibold);
  color: var(--color-gray-900);
}

/* Input Area */
.input-area {
  padding: var(--spacing-4) var(--spacing-6) var(--spacing-6);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

#chat-form {
  display: flex;
  gap: var(--spacing-3);
}

#message-input {
  flex: 1;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-gray-900);
  background: var(--color-surface);
  transition: all var(--duration-fast) var(--ease-out);
}

#message-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

#message-input::placeholder {
  color: var(--color-gray-400);
}

.btn-send {
  background: var(--color-primary);
  color: white;
  border: none;
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-xl);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: var(--font-semibold);
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-send:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.input-hint {
  margin-top: var(--spacing-3);
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-align: center;
}

.loading-messages {
  text-align: center;
  padding: var(--spacing-10);
  color: var(--color-gray-500);
}

.error-message {
  text-align: center;
  padding: var(--spacing-10);
  color: var(--color-error);
}

/* Spinner */
.spinner {
  display: inline-block;
  animation: blink 1.4s infinite both;
}

@keyframes blink {
  0%, 80%, 100% { opacity: 0; }
  40% { opacity: 1; }
}

/* ===== ONBOARDING PAGE ===== */
.onboarding-container {
  max-width: 900px;
  margin: var(--spacing-10) auto;
  padding: var(--spacing-6);
}

.onboarding-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-10);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  margin-bottom: var(--spacing-6);
}

.onboarding-card h1 {
  text-align: center;
  margin-bottom: var(--spacing-6);
}

.onboarding-card > p {
  text-align: center;
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-8);
}

/* Deployment Selector */
.deployment-selector {
  display: flex;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-10);
  justify-content: center;
}

.selector-card {
  flex: 1;
  max-width: 400px;
  padding: var(--spacing-8);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  text-align: center;
}

.selector-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.selector-card.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.selector-card h3 {
  margin: var(--spacing-3) 0;
  color: var(--color-gray-900);
}

.selector-card p {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-2);
}

.selector-card small {
  color: var(--color-gray-500);
  font-size: var(--text-xs);
}

/* Step Indicator */
.step-indicator {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-10);
  position: relative;
}

.step {
  flex: 1;
  text-align: center;
  position: relative;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-gray-200);
  color: var(--color-gray-500);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  margin-bottom: var(--spacing-2);
  transition: all var(--duration-normal) var(--ease-out);
}

.step.active .step-number {
  background: var(--color-primary);
  color: white;
}

.step.completed .step-number {
  background: var(--color-success);
  color: white;
}

.step-label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.step.active .step-label {
  color: var(--color-gray-900);
  font-weight: var(--font-medium);
}

/* Code Block */
.code-block {
  background: var(--color-gray-100);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  overflow-x: auto;
  margin: var(--spacing-4) 0;
  color: var(--color-gray-800);
  white-space: pre-wrap;
}

/* Info & Warning Boxes */
.info-box {
  background: #DBEAFE;
  border-left: 4px solid var(--color-info);
  padding: var(--spacing-4);
  margin: var(--spacing-5) 0;
  border-radius: var(--radius-md);
  color: #1E40AF;
}

[data-theme="dark"] .info-box {
  background: #172554;
  color: #93C5FD;
}

.info-box strong {
  color: inherit;
}

.warning-box {
  background: #FEF3C7;
  border-left: 4px solid var(--color-warning);
  padding: var(--spacing-4);
  margin: var(--spacing-5) 0;
  border-radius: var(--radius-md);
  color: #92400E;
}

[data-theme="dark"] .warning-box {
  background: #422006;
  color: #FCD34D;
}

.warning-box strong {
  color: inherit;
}

/* External ID Display */
.external-id-display {
  background: var(--color-gray-50);
  padding: var(--spacing-4);
  border-radius: var(--radius-lg);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  text-align: center;
  margin: var(--spacing-4) 0;
  border: 2px dashed var(--color-primary);
  color: var(--color-gray-900);
}

.btn-copy {
  background: var(--color-info);
  color: white;
  border: none;
  padding: 6px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  margin-left: var(--spacing-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-copy:hover {
  background: #2563EB;
}

.btn-download {
  background: var(--color-success);
  color: white;
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-lg);
  text-decoration: none;
  display: inline-block;
  margin: var(--spacing-3) 0;
  font-weight: var(--font-semibold);
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-download:hover {
  background: #059669;
  color: white;
}

/* Account Table */
.account-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-5) 0;
}

.account-table th,
.account-table td {
  border: 1px solid var(--color-border);
  padding: var(--spacing-3);
  text-align: left;
}

.account-table th {
  background: var(--color-primary);
  color: white;
  font-weight: var(--font-semibold);
}

.account-table td {
  background: var(--color-surface);
}

.account-table tr:nth-child(even) td {
  background: var(--color-gray-50);
}

.status-badge-table {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
}

.status-deployed {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.status-pending-table {
  background: #FEF3C7;
  color: #B45309;
}

/* Onboarding Spinner */
.onboarding-spinner {
  border: 4px solid var(--color-gray-200);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: var(--spacing-6) auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-8px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar {
    display: none;
  }

  .message-bubble {
    max-width: 85%;
  }

  .hero {
    padding: var(--spacing-8) var(--spacing-5);
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }

  .subtitle {
    font-size: var(--text-lg);
  }

  .deployment-selector {
    flex-direction: column;
    align-items: center;
  }

  .selector-card {
    max-width: 100%;
  }

  .nav-header {
    padding: 0 var(--spacing-4);
  }

  .nav-links {
    display: none;
  }

  .chat-header {
    padding: var(--spacing-3) var(--spacing-4);
  }

  .messages {
    padding: var(--spacing-4);
  }

  .input-area {
    padding: var(--spacing-3) var(--spacing-4) var(--spacing-4);
  }
}

/* ===== UTILITIES ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }