/* ==========================================================================
   Delicatest Modern Design System
   A clean, minimal design with teal as the primary brand color
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties (Variables)
   ========================================================================== */

:root {
  /* Primary Colors - Teal */
  --color-primary: #0D9488;
  --color-primary-light: #14B8A6;
  --color-primary-dark: #0F766E;
  --color-primary-subtle: #CCFBF1;
  --color-primary-hover: #0F766E;

  /* Accent */
  --color-accent: #6366F1;
  --color-accent-light: #818CF8;

  /* Semantic Colors */
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-error: #EF4444;
  --color-error-light: #FEE2E2;
  --color-info: #3B82F6;
  --color-info-light: #DBEAFE;

  /* Neutrals */
  --color-text-primary: #1F2937;
  --color-text-secondary: #6B7280;
  --color-text-muted: #9CA3AF;
  --color-text-inverse: #FFFFFF;
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;
  --color-background: #F9FAFB;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F9FAFB;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

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

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

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
}

/* ==========================================================================
   2. CSS Reset & Base Styles
   ========================================================================== */

*, *::before, *::after {
  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-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  margin: 0;
  padding: 0;
}

body.dm-auth-page {
  background: linear-gradient(135deg, var(--color-primary-subtle) 0%, var(--color-background) 100%);
  min-height: 100vh;
}

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 var(--spacing-md) 0;
  line-height: var(--leading-tight);
}

h1, .dm-h1 { font-size: var(--text-4xl); font-weight: 700; }
h2, .dm-h2 { font-size: var(--text-3xl); }
h3, .dm-h3 { font-size: var(--text-2xl); }
h4, .dm-h4 { font-size: var(--text-xl); }
h5, .dm-h5 { font-size: var(--text-lg); }
h6, .dm-h6 { font-size: var(--text-base); }

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

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

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

.dm-text-muted { color: var(--color-text-muted); }
.dm-text-secondary { color: var(--color-text-secondary); }
.dm-text-primary { color: var(--color-primary); }
.dm-text-success { color: var(--color-success); }
.dm-text-warning { color: var(--color-warning); }
.dm-text-error { color: var(--color-error); }

/* ==========================================================================
   4. Layout Components
   ========================================================================== */

.dm-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.dm-container-sm { max-width: 640px; }
.dm-container-md { max-width: 768px; }
.dm-container-lg { max-width: 1024px; }

.dm-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.dm-main-content {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

.dm-page-header {
  margin-bottom: var(--spacing-xl);
}

.dm-page-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
}

.dm-page-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin: var(--spacing-sm) 0 0 0;
}

/* Grid */
.dm-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.dm-grid-2 { grid-template-columns: repeat(2, 1fr); }
.dm-grid-3 { grid-template-columns: repeat(3, 1fr); }
.dm-grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .dm-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .dm-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .dm-grid-2, .dm-grid-3, .dm-grid-4 { grid-template-columns: 1fr; }
}

/* Flexbox utilities */
.dm-flex { display: flex; }
.dm-flex-col { flex-direction: column; }
.dm-items-center { align-items: center; }
.dm-justify-center { justify-content: center; }
.dm-justify-between { justify-content: space-between; }
.dm-gap-sm { gap: var(--spacing-sm); }
.dm-gap-md { gap: var(--spacing-md); }
.dm-gap-lg { gap: var(--spacing-lg); }

/* ==========================================================================
   5. Header / Navigation
   ========================================================================== */

.dm-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.dm-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.dm-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
}

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

.dm-logo-img {
  height: 32px;
  width: auto;
}

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

/* Main Navigation */
.dm-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.dm-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.dm-nav-link:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

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

.dm-nav-link i {
  font-size: 1.1em;
}

/* User Menu */
.dm-user-menu {
  position: relative;
}

.dm-user-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dm-user-btn:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border);
}

.dm-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  background: var(--color-primary-subtle);
}

.dm-user-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.dm-user-dropdown {
  position: absolute;
  top: calc(100% + var(--spacing-sm));
  right: 0;
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.dm-user-menu.open .dm-user-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dm-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.dm-dropdown-item:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.dm-dropdown-item:first-child {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.dm-dropdown-item:last-child {
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.dm-dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-xs) 0;
}

/* Mobile Menu */
.dm-mobile-toggle {
  display: none;
  padding: var(--spacing-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-primary);
}

.dm-mobile-toggle i {
  font-size: 1.5rem;
}

.dm-mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--color-surface);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-modal);
  transition: right var(--transition-slow);
  overflow-y: auto;
}

.dm-mobile-menu.open {
  right: 0;
}

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

.dm-mobile-close {
  padding: var(--spacing-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
}

.dm-mobile-nav {
  padding: var(--spacing-md);
}

.dm-mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  font-weight: 500;
  text-decoration: none;
}

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

.dm-mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-modal) - 1);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.dm-mobile-overlay.open {
  display: block;
  opacity: 1;
}

@media (max-width: 768px) {
  .dm-nav {
    display: none;
  }

  .dm-user-name {
    display: none;
  }

  .dm-mobile-toggle {
    display: block;
  }

  .dm-mobile-menu {
    display: block;
  }
}

/* ==========================================================================
   6. Cards
   ========================================================================== */

.dm-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.dm-card:hover {
  box-shadow: var(--shadow-md);
}

.dm-card-clickable:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.dm-card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.dm-card-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.dm-card-content {
  padding: var(--spacing-lg);
}

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

/* Stat Card */
.dm-stat-card {
  padding: var(--spacing-lg);
}

.dm-stat-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.dm-stat-value {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
}

.dm-stat-change {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  font-size: var(--text-sm);
}

.dm-stat-change.positive { color: var(--color-success); }
.dm-stat-change.negative { color: var(--color-error); }

/* Color accent cards */
.dm-card-accent-primary { border-left: 4px solid var(--color-primary); }
.dm-card-accent-success { border-left: 4px solid var(--color-success); }
.dm-card-accent-warning { border-left: 4px solid var(--color-warning); }
.dm-card-accent-error { border-left: 4px solid var(--color-error); }
.dm-card-accent-info { border-left: 4px solid var(--color-info); }

/* ==========================================================================
   7. Buttons
   ========================================================================== */

.dm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

/* Primary */
.dm-btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

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

/* Secondary */
.dm-btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.dm-btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

/* Ghost */
.dm-btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.dm-btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

/* Danger */
.dm-btn-danger {
  background: var(--color-error);
  color: var(--color-text-inverse);
  border-color: var(--color-error);
}

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

/* Success */
.dm-btn-success {
  background: var(--color-success);
  color: var(--color-text-inverse);
  border-color: var(--color-success);
}

.dm-btn-success:hover:not(:disabled) {
  background: #059669;
  border-color: #059669;
}

/* Sizes */
.dm-btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--text-xs);
}

.dm-btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--text-base);
}

.dm-btn-xl {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--text-lg);
}

/* Full width */
.dm-btn-block {
  width: 100%;
}

/* Icon button */
.dm-btn-icon {
  padding: var(--spacing-sm);
  width: 40px;
  height: 40px;
}

.dm-btn-icon.dm-btn-sm {
  width: 32px;
  height: 32px;
}

/* ==========================================================================
   8. Forms
   ========================================================================== */

.dm-form-group {
  margin-bottom: var(--spacing-lg);
}

.dm-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.dm-label-required::after {
  content: ' *';
  color: var(--color-error);
}

.dm-input,
.dm-select,
.dm-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.dm-input:focus,
.dm-select:focus,
.dm-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

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

.dm-input.error {
  border-color: var(--color-error);
}

.dm-input.error:focus {
  box-shadow: 0 0 0 3px var(--color-error-light);
}

.dm-textarea {
  min-height: 120px;
  resize: vertical;
}

.dm-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236B7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 40px;
}

.dm-form-hint {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

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

/* Checkbox & Radio */
.dm-checkbox,
.dm-radio {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.dm-checkbox input,
.dm-radio input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.dm-checkbox-label,
.dm-radio-label {
  font-size: var(--text-base);
  color: var(--color-text-primary);
  line-height: 1.4;
}

/* Input group */
.dm-input-group {
  display: flex;
}

.dm-input-group .dm-input {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.dm-input-group .dm-btn {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-left: -1px;
}

/* ==========================================================================
   9. Tables
   ========================================================================== */

.dm-table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.dm-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

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

.dm-table th {
  font-weight: 600;
  color: var(--color-text-primary);
  background: var(--color-background);
  white-space: nowrap;
}

.dm-table tbody tr:hover {
  background: var(--color-surface-hover);
}

.dm-table tbody tr:last-child td {
  border-bottom: none;
}

/* ==========================================================================
   10. Badges & Tags
   ========================================================================== */

.dm-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-full);
}

.dm-badge-primary {
  background: var(--color-primary-subtle);
  color: var(--color-primary-dark);
}

.dm-badge-success {
  background: var(--color-success-light);
  color: #065F46;
}

.dm-badge-warning {
  background: var(--color-warning-light);
  color: #92400E;
}

.dm-badge-error {
  background: var(--color-error-light);
  color: #991B1B;
}

.dm-badge-info {
  background: var(--color-info-light);
  color: #1E40AF;
}

.dm-badge-neutral {
  background: var(--color-border-light);
  color: var(--color-text-secondary);
}

/* ==========================================================================
   11. Modals
   ========================================================================== */

.dm-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.dm-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.dm-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  overflow: hidden;
}

.dm-modal.open {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.dm-modal-lg { max-width: 800px; }
.dm-modal-xl { max-width: 1140px; }

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

.dm-modal-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0;
}

.dm-modal-close {
  padding: var(--spacing-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.dm-modal-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.dm-modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

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

/* ==========================================================================
   12. Alerts & Messages
   ========================================================================== */

.dm-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
}

.dm-alert-icon {
  flex-shrink: 0;
  font-size: 1.25rem;
}

.dm-alert-content {
  flex: 1;
}

.dm-alert-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.dm-alert-success {
  background: var(--color-success-light);
  color: #065F46;
}

.dm-alert-warning {
  background: var(--color-warning-light);
  color: #92400E;
}

.dm-alert-error {
  background: var(--color-error-light);
  color: #991B1B;
}

.dm-alert-info {
  background: var(--color-info-light);
  color: #1E40AF;
}

/* ==========================================================================
   13. Progress & Loading
   ========================================================================== */

.dm-progress {
  width: 100%;
  height: 8px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.dm-progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.dm-progress-bar.success { background: var(--color-success); }
.dm-progress-bar.warning { background: var(--color-warning); }
.dm-progress-bar.error { background: var(--color-error); }

/* Spinner */
.dm-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: dm-spin 0.8s linear infinite;
}

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

.dm-spinner-sm { width: 16px; height: 16px; }
.dm-spinner-lg { width: 32px; height: 32px; }

/* ==========================================================================
   14. Authentication Pages
   ========================================================================== */

.dm-auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
}

.dm-auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.dm-auth-header {
  padding: var(--spacing-2xl) var(--spacing-xl) var(--spacing-lg);
  text-align: center;
}

.dm-auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.dm-auth-logo-icon {
  width: 48px;
  height: 48px;
}

.dm-auth-logo-text {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.dm-auth-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.dm-auth-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: var(--spacing-sm) 0 0;
}

.dm-auth-body {
  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-2xl);
}

.dm-auth-footer {
  padding: var(--spacing-lg) var(--spacing-xl);
  background: var(--color-background);
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.dm-auth-footer p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.dm-auth-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.dm-auth-divider::before,
.dm-auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ==========================================================================
   15. Student Test Interface
   ========================================================================== */

.dm-test-container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.dm-test-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.dm-test-timer {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

.dm-test-timer.warning {
  color: var(--color-warning);
}

.dm-test-timer.danger {
  color: var(--color-error);
}

.dm-test-progress {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.dm-test-progress-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Question Navigation */
.dm-question-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.dm-question-dot {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dm-question-dot:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.dm-question-dot.current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.dm-question-dot.answered {
  background: var(--color-primary-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.dm-question-dot.correct {
  background: var(--color-success-light);
  border-color: var(--color-success);
  color: var(--color-success);
}

.dm-question-dot.incorrect {
  background: var(--color-error-light);
  border-color: var(--color-error);
  color: var(--color-error);
}

/* Question Card */
.dm-question-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.dm-question-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.dm-question-number {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.dm-question-text {
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

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

.dm-question-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-background);
}

/* Answer Options */
.dm-answer-option {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dm-answer-option:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-subtle);
}

.dm-answer-option.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.dm-answer-option.correct {
  border-color: var(--color-success);
  background: var(--color-success-light);
}

.dm-answer-option.incorrect {
  border-color: var(--color-error);
  background: var(--color-error-light);
}

.dm-answer-radio,
.dm-answer-checkbox {
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.dm-answer-text {
  flex: 1;
  font-size: var(--text-base);
  color: var(--color-text-primary);
  line-height: var(--leading-normal);
}

/* Test Start/Finish screens */
.dm-test-start,
.dm-test-finish {
  max-width: 600px;
  margin: var(--spacing-3xl) auto;
  text-align: center;
}

.dm-test-start-icon,
.dm-test-finish-icon {
  font-size: 4rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.dm-test-start-title,
.dm-test-finish-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.dm-test-start-desc,
.dm-test-finish-desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* Results */
.dm-result-score {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-2xl);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-xl);
  margin-bottom: var(--spacing-xl);
}

.dm-result-score-value {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.dm-result-score-label {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-sm);
}

/* ==========================================================================
   16. Footer
   ========================================================================== */

.dm-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: auto;
}

.dm-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.dm-footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

@media (max-width: 640px) {
  .dm-footer-inner {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
}

/* ==========================================================================
   17. Utilities
   ========================================================================== */

/* Spacing */
.dm-mt-0 { margin-top: 0; }
.dm-mt-sm { margin-top: var(--spacing-sm); }
.dm-mt-md { margin-top: var(--spacing-md); }
.dm-mt-lg { margin-top: var(--spacing-lg); }
.dm-mt-xl { margin-top: var(--spacing-xl); }

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

.dm-p-0 { padding: 0; }
.dm-p-sm { padding: var(--spacing-sm); }
.dm-p-md { padding: var(--spacing-md); }
.dm-p-lg { padding: var(--spacing-lg); }
.dm-p-xl { padding: var(--spacing-xl); }

/* Text alignment */
.dm-text-left { text-align: left; }
.dm-text-center { text-align: center; }
.dm-text-right { text-align: right; }

/* Display */
.dm-hidden { display: none; }
.dm-block { display: block; }
.dm-inline { display: inline; }
.dm-inline-block { display: inline-block; }

/* Visibility */
@media (max-width: 640px) {
  .dm-hide-mobile { display: none !important; }
}

@media (min-width: 641px) {
  .dm-hide-desktop { display: none !important; }
}

/* ==========================================================================
   18. Animations
   ========================================================================== */

@keyframes dm-fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes dm-fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes dm-scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.dm-animate-fade-in {
  animation: dm-fade-in var(--transition-slow) ease-out;
}

.dm-animate-fade-in-up {
  animation: dm-fade-in-up var(--transition-slow) ease-out;
}

.dm-animate-scale-in {
  animation: dm-scale-in var(--transition-base) ease-out;
}

/* Staggered animations */
.dm-stagger > *:nth-child(1) { animation-delay: 0ms; }
.dm-stagger > *:nth-child(2) { animation-delay: 50ms; }
.dm-stagger > *:nth-child(3) { animation-delay: 100ms; }
.dm-stagger > *:nth-child(4) { animation-delay: 150ms; }
.dm-stagger > *:nth-child(5) { animation-delay: 200ms; }

/* ==========================================================================
   19. Welcome/Landing Page
   ========================================================================== */

.dm-hero {
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.dm-hero-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
  .dm-hero-title {
    font-size: 3.5rem;
  }
}

.dm-hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

.dm-hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.dm-features {
  padding: var(--spacing-3xl) 0;
}

.dm-feature-card {
  padding: var(--spacing-xl);
  text-align: center;
}

.dm-feature-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-xl);
  color: var(--color-primary);
  font-size: 1.75rem;
}

.dm-feature-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.dm-feature-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

/* ==========================================================================
   20. Override Bootstrap defaults (for gradual migration)
   ========================================================================== */

/* Keep Bootstrap grid but override visual styles */
.btn-primary {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark) !important;
  border-color: var(--color-primary-dark) !important;
}

.btn-info {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
}

.btn-info:hover {
  background-color: var(--color-primary-dark) !important;
  border-color: var(--color-primary-dark) !important;
}

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

.bg-primary {
  background-color: var(--color-primary) !important;
}

.border-left-primary {
  border-left-color: var(--color-primary) !important;
}

/* Card overrides */
.card {
  border-radius: var(--radius-lg);
  border-color: var(--color-border);
}

.card-header {
  background-color: var(--color-surface);
  border-bottom-color: var(--color-border);
}

/* Link color */
a {
  color: var(--color-primary);
}

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