/* AI Agent Memory Bank - Main Styles */

/* ================================
   CSS Variables / Design Tokens
   ================================ */
:root {
  /* Colors */
  --color-primary: #6366F1;
  --color-primary-hover: #5558E3;
  --color-secondary: #0F172A;
  --color-accent: #10B981;
  --color-background: #0F172A;
  --color-surface: #1E293B;
  --color-surface-hover: #273548;
  --color-text-primary: #F1F5F9;
  --color-text-secondary: #94A3B8;
  --color-border: #334155;
  --color-error: #EF4444;
  --color-warning: #F59E0B;
  --color-success: #10B981;

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

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

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

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

img, svg {
  max-width: 100%;
  height: auto;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text-primary);
}

h1 { font-size: 3rem; font-weight: 700; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  color: var(--color-text-secondary);
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* ================================
   Layout
   ================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ================================
   Buttons
   ================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: white;
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: 1rem;
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: 0.75rem;
}

/* ================================
   Navigation
   ================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-primary);
  font-weight: 600;
  font-size: 1.125rem;
}

.nav-logo:hover {
  color: var(--color-text-primary);
}

.nav-logo-icon {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: var(--space-6);
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-actions {
  display: flex;
  gap: var(--space-3);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
  padding: var(--space-2);
}

.nav-mobile-toggle svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .nav-links, .nav-actions {
    display: none;
  }
  .nav-mobile-toggle {
    display: block;
  }
}

/* ================================
   Sections
   ================================ */
section {
  padding: var(--space-16) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ================================
   Cards
   ================================ */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-fast);
}

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

/* ================================
   Forms
   ================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-input::placeholder {
  color: var(--color-text-secondary);
}

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

/* ================================
   Stats
   ================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.stat-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
}

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

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ================================
   Tables
   ================================ */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  background-color: var(--color-surface);
}

tr:hover td {
  background-color: var(--color-surface);
}

/* ================================
   Badges
   ================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
}

.badge-primary {
  background-color: rgba(99, 102, 241, 0.2);
  color: var(--color-primary);
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.2);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.2);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgba(239, 68, 68, 0.2);
  color: var(--color-error);
}

/* ================================
   Loading & States
   ================================ */
.skeleton {
  background: linear-gradient(90deg, var(--color-surface) 25%, var(--color-surface-hover) 50%, var(--color-surface) 75%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-pulse {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

/* ================================
   Toast Notifications
   ================================ */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.3s ease-out;
}

.toast-success {
  border-left: 3px solid var(--color-success);
}

.toast-error {
  border-left: 3px solid var(--color-error);
}

.toast-warning {
  border-left: 3px solid var(--color-warning);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

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

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.hidden { display: none; }

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  section { padding: var(--space-12) 0; }
}