/* ============================================================================
   EBEO DESIGN SYSTEM - Centralized Styling
   ============================================================================ */

/* Base colors and typography */
:root {
  /* Modern Color Palette - Light Mode */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f9fc;
  --color-bg-tertiary: #f1f3f8;
  --color-bg-hover: #f5f7fb;
  
  --color-text-primary: #1a202c;
  --color-text-secondary: #4a5568;
  --color-text-tertiary: #718096;
  --color-text-muted: #a0aec0;
  
  --color-border-light: #e2e8f0;
  --color-border-base: #cbd5e0;
  --color-border-dark: #a0aec0;
  
  --color-blue-50: #f0f9ff;
  --color-blue-100: #e0f2fe;
  --color-blue-500: #0ea5e9;
  --color-blue-600: #0284c7;
  --color-blue-700: #0369a1;
  --color-blue-800: #075985;
  
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  
  --color-red-100: #fee2e2;
  --color-red-500: #ef4444;
  --color-red-600: #dc2626;
  --color-red-700: #b91c1c;
  
  --color-amber-100: #fef3c7;
  --color-amber-500: #f59e0b;
  --color-amber-600: #d97706;
  
  --color-green-500: #22c55e;
  --color-green-600: #16a34a;
  
  /* Semantic Colors - Light Mode */
  --semantic-primary: #0284c7;
  --semantic-primary-hover: #0369a1;
  --semantic-primary-active: #075985;
  --semantic-primary-light: #e0f2fe;
  
  --semantic-danger: #dc2626;
  --semantic-danger-hover: #b91c1c;
  --semantic-danger-light: #fee2e2;
  
  --semantic-warning: #f59e0b;
  --semantic-warning-hover: #d97706;
  --semantic-warning-light: #fef3c7;
  
  --semantic-success: #22c55e;
  --semantic-success-hover: #16a34a;
  --semantic-success-light: #dcfce7;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 2.5rem;
  --spacing-3xl: 3rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
}

/* Dark Mode */
body.dark-mode {
  --color-bg-primary: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-tertiary: #334155;
  --color-bg-hover: #1e293b;
  
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-tertiary: #94a3b8;
  --color-text-muted: #64748b;
  
  --color-border-light: #475569;
  --color-border-base: #334155;
  --color-border-dark: #1e293b;
  
  --semantic-primary: #38bdf8;
  --semantic-primary-hover: #0ea5e9;
  --semantic-primary-active: #0284c7;
  --semantic-primary-light: rgba(56, 189, 248, 0.1);
  
  --semantic-danger: #f87171;
  --semantic-danger-hover: #ef4444;
  --semantic-danger-light: rgba(248, 113, 113, 0.1);
  
  --semantic-warning: #fbbf24;
  --semantic-warning-hover: #f59e0b;
  --semantic-warning-light: rgba(251, 191, 36, 0.1);
  
  --semantic-success: #4ade80;
  --semantic-success-hover: #22c55e;
  --semantic-success-light: rgba(74, 222, 128, 0.1);
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

* {
  box-sizing: border-box;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

p {
  margin: 0 0 var(--spacing-md) 0;
}

p:last-child {
  margin-bottom: 0;
}

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

a:hover {
  color: var(--semantic-primary-hover);
  text-decoration: underline;
}

/* ============================================================================
   FORMS & INPUTS
   ============================================================================ */

input,
select,
textarea {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--color-border-base);
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--semantic-primary);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
}

textarea {
  resize: vertical;
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

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

/* Primary Button */
.btn-primary,
button:not([class]) {
  background: var(--semantic-primary);
  color: white;
  border-color: var(--semantic-primary);
}

.btn-primary:hover:not(:disabled),
button:not([class]):hover:not(:disabled) {
  background: var(--semantic-primary-hover);
  border-color: var(--semantic-primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled),
button:not([class]):active:not(:disabled) {
  background: var(--semantic-primary-active);
  border-color: var(--semantic-primary-active);
}

/* Secondary Button */
.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border-color: var(--color-border-base);
}

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

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

.btn-danger:hover:not(:disabled) {
  background: var(--semantic-danger-hover);
  border-color: var(--semantic-danger-hover);
  box-shadow: var(--shadow-md);
}

/* Success Button */
.btn-success {
  background: var(--semantic-success);
  color: white;
  border-color: var(--semantic-success);
}

.btn-success:hover:not(:disabled) {
  background: var(--semantic-success-hover);
  border-color: var(--semantic-success-hover);
  box-shadow: var(--shadow-md);
}

/* Small Button */
.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

/* Large Button */
.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* ============================================================================
   CARDS & PANELS
   ============================================================================ */

.card,
.panel {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-base);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

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

.card-header {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-base);
}

.card-body {
  margin-bottom: var(--spacing-md);
}

.card-body:last-child {
  margin-bottom: 0;
}

.card-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border-base);
}

/* ============================================================================
   ALERTS & BADGES
   ============================================================================ */

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid transparent;
  margin-bottom: var(--spacing-md);
}

.alert-info {
  background: var(--semantic-primary-light);
  border-left-color: var(--semantic-primary);
  color: var(--color-text-primary);
}

.alert-danger {
  background: var(--semantic-danger-light);
  border-left-color: var(--semantic-danger);
  color: var(--color-text-primary);
}

.alert-warning {
  background: var(--semantic-warning-light);
  border-left-color: var(--semantic-warning);
  color: var(--color-text-primary);
}

.alert-success {
  background: var(--semantic-success-light);
  border-left-color: var(--semantic-success);
  color: var(--color-text-primary);
}

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
}

.badge-primary {
  background: var(--semantic-primary-light);
  color: var(--semantic-primary);
}

.badge-danger {
  background: var(--semantic-danger-light);
  color: var(--semantic-danger);
}

.badge-warning {
  background: var(--semantic-warning-light);
  color: var(--semantic-warning);
}

.badge-success {
  background: var(--semantic-success-light);
  color: var(--semantic-success);
}

/* ============================================================================
   TABLES
   ============================================================================ */

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg-primary);
}

thead {
  background: var(--color-bg-tertiary);
}

th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-base);
}

td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
}

tbody tr:hover {
  background: var(--color-bg-secondary);
}

/* ============================================================================
   MODAL & OVERLAY
   ============================================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  z-index: 1000;
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-base);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border-base);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* ============================================================================
   TOGGLE SWITCH
   ============================================================================ */

.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
  padding: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-border-base);
  transition: background-color var(--transition-fast);
  border-radius: var(--radius-full);
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: transform var(--transition-fast);
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--semantic-primary);
}

input:checked + .slider:before {
  transform: translateX(24px);
}

input:disabled + .slider {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.text-muted {
  color: var(--color-text-muted);
}

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

.text-tertiary {
  color: var(--color-text-tertiary);
}

.text-primary {
  color: var(--semantic-primary);
}

.text-danger {
  color: var(--semantic-danger);
}

.text-warning {
  color: var(--semantic-warning);
}

.text-success {
  color: var(--semantic-success);
}

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

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

.font-medium {
  font-weight: var(--font-weight-medium);
}

.font-semibold {
  font-weight: var(--font-weight-semibold);
}

.font-bold {
  font-weight: var(--font-weight-bold);
}

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-75 {
  opacity: 0.75;
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 640px) {
  :root {
    font-size: 14px;
  }
  
  h1 {
    font-size: var(--font-size-2xl);
  }
  
  h2 {
    font-size: var(--font-size-xl);
  }
}