/* Meritium - Material Design CSS */
/* Mobile-first responsive design */

:root {
  /* Material Design Colors - Configurable */
  --primary-color: #1976D2;
  --primary-variant: #1565C0;
  --secondary-color: #DC004E;
  --accent-color: #FF5722;
  --background-color: #FAFAFA;
  --surface-color: #FFFFFF;
  --error-color: #B00020;
  --on-primary: #FFFFFF;
  --on-secondary: #FFFFFF;
  --on-background: #000000;
  --on-surface: #000000;
  --text-primary: rgba(0, 0, 0, 0.87);
  --text-secondary: rgba(0, 0, 0, 0.60);
  --text-disabled: rgba(0, 0, 0, 0.38);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  /* Enhanced elevation shadows */
  --elevation-1: 0 2px 4px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.16);
  --elevation-2: 0 4px 8px rgba(0,0,0,0.12), 0 2px 4px rgba(0,0,0,0.20);
  --elevation-3: 0 8px 16px rgba(0,0,0,0.16), 0 4px 8px rgba(0,0,0,0.24);
  --elevation-4: 0 12px 24px rgba(0,0,0,0.20), 0 6px 12px rgba(0,0,0,0.28);
  --elevation-5: 0 16px 32px rgba(0,0,0,0.24), 0 8px 16px rgba(0,0,0,0.32);
  
  /* Typography */
  --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.75rem;
  --font-size-h4: 1.5rem;
  --font-size-h5: 1.25rem;
  --font-size-h6: 1rem;
  --font-size-body1: 1rem;
  --font-size-body2: 0.875rem;
  --font-size-caption: 0.75rem;
  
  /* Border radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
}

/* Reset and base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }
h5 { font-size: var(--font-size-h5); }
h6 { font-size: var(--font-size-h6); }

p {
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-body1);
}

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

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

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

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--spacing-sm) * -1);
}

.col {
  flex: 1;
  padding: 0 var(--spacing-sm);
}

.col-12 { flex: 0 0 100%; }
.col-6 { flex: 0 0 50%; }
.col-4 { flex: 0 0 33.333333%; }
.col-3 { flex: 0 0 25%; }

/* Responsive grid */
@media (max-width: 768px) {
  .col-md-12 { flex: 0 0 100%; }
  .col-md-6 { flex: 0 0 100%; }
  .col-md-4 { flex: 0 0 100%; }
  .col-md-3 { flex: 0 0 100%; }
}

/* Material Cards */
.card {
  background-color: var(--surface-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--elevation-1);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.card:hover {
  box-shadow: var(--elevation-2);
}

.card-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
}

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

.card-footer {
  padding: var(--spacing-md);
  border-top: 1px solid rgba(0, 0, 0, 0.12);
  background-color: rgba(0, 0, 0, 0.02);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-body2);
  font-weight: 500;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 36px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--on-primary);
  box-shadow: var(--elevation-1);
}

.btn-primary:hover {
  background-color: var(--primary-variant);
  box-shadow: var(--elevation-2);
}

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

.btn-secondary:hover {
  background-color: rgba(25, 118, 210, 0.08);
}

.btn-fab {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  position: fixed;
  bottom: var(--spacing-md);
  right: var(--spacing-md);
  background-color: var(--accent-color);
  color: var(--on-primary);
  box-shadow: var(--elevation-3);
  z-index: 1000;
}

.btn-fab:hover {
  box-shadow: var(--elevation-4);
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-body2);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.form-control {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid rgba(0, 0, 0, 0.23);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-body1);
  background-color: transparent;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  border-width: 2px;
}

.form-control:invalid {
  border-color: var(--error-color);
}

/* Navigation */
.navbar {
  background-color: var(--primary-color);
  color: var(--on-primary);
  padding: var(--spacing-md);
  box-shadow: var(--elevation-2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-brand {
  font-size: var(--font-size-h5);
  font-weight: 500;
  text-decoration: none;
  color: inherit;
}

.navbar-nav {
  display: flex;
  list-style: none;
  margin-left: auto;
}

.nav-item {
  margin-left: var(--spacing-md);
}

.nav-link {
  color: inherit;
  text-decoration: none;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: background-color 0.3s ease;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Bottom Navigation (Mobile) */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--surface-color);
  border-top: 1px solid rgba(0, 0, 0, 0.12);
  display: flex;
  z-index: 100;
}

.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.bottom-nav-item.active {
  color: var(--primary-color);
}

.bottom-nav-icon {
  font-size: 24px;
  margin-bottom: var(--spacing-xs);
}

.bottom-nav-label {
  font-size: var(--font-size-caption);
}

/* Lists */
.list {
  background-color: var(--surface-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--elevation-1);
}

.list-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.list-item:last-child {
  border-bottom: none;
}

.list-item:hover {
  background-color: rgba(0, 0, 0, 0.04);
}

.list-item-icon {
  margin-right: var(--spacing-md);
  color: var(--text-secondary);
}

.list-item-content {
  flex: 1;
}

.list-item-title {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.list-item-subtitle {
  color: var(--text-secondary);
  font-size: var(--font-size-body2);
}

.list-item-action {
  margin-left: var(--spacing-md);
}

/* Chips */
.chip {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(0, 0, 0, 0.08);
  border-radius: var(--border-radius-xl);
  font-size: var(--font-size-body2);
  margin: var(--spacing-xs);
}

.chip-primary {
  background-color: var(--primary-color);
  color: var(--on-primary);
}

.chip-success {
  background-color: #4CAF50;
  color: white;
}

.chip-warning {
  background-color: #FF9800;
  color: white;
}

/* Snackbar */
.snackbar {
  position: fixed;
  bottom: var(--spacing-md);
  left: var(--spacing-md);
  right: var(--spacing-md);
  background-color: #323232;
  color: white;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--elevation-3);
  z-index: 1001;
  transform: translateY(100px);
  transition: transform 0.3s ease;
}

.snackbar.show {
  transform: translateY(0);
}

/* Progress indicators */
.progress-circular {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(25, 118, 210, 0.2);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }

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

.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

.m-0 { margin: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }

/* Mobile-specific adjustments */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .navbar {
    display: none;
  }
  
  .main-content {
    padding-bottom: 80px; /* Space for bottom nav */
  }
  
  .btn-fab {
    bottom: 90px; /* Above bottom nav */
  }
}

/* Desktop-specific adjustments */
@media (min-width: 769px) {
  .bottom-nav {
    display: none;
  }
  
  .navbar-nav {
    display: flex;
  }
}

/* Enhanced Visual Elements */

/* Gradient backgrounds */
.gradient-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-variant));
}

.gradient-accent {
  background: linear-gradient(135deg, var(--accent-color), #FF8A50);
}

.gradient-surface {
  background: linear-gradient(135deg, var(--surface-color), #FEFEFE);
}

/* Enhanced buttons with gradients */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-variant));
  border: none;
  box-shadow: var(--elevation-2);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-variant), var(--primary-color));
  box-shadow: var(--elevation-3);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-color), #FF8A50);
  color: white;
  border: none;
  box-shadow: var(--elevation-2);
}

/* Glass morphism effects */
.glass {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-dark {
  background: rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Enhanced cards with depth */
.card-enhanced {
  background: linear-gradient(145deg, #ffffff, #f5f5f5);
  border: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
}

.card-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
}

/* Floating elements */
.floating {
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* Pulse effect for important elements */
.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(25, 118, 210, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(25, 118, 210, 0); }
  100% { box-shadow: 0 0 0 0 rgba(25, 118, 210, 0); }
}

/* Subtle border effects */
.border-gradient {
  position: relative;
  border: 2px solid transparent;
  background: linear-gradient(white, white) padding-box,
              linear-gradient(135deg, var(--primary-color), var(--accent-color)) border-box;
}

/* Enhanced focus states */
.form-control:focus,
.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.2);
}

/* Smooth scrollbar styling */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--background-color);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-variant);
}

/* Selection styling */
::selection {
  background: var(--primary-color);
  color: white;
}