/* 
  Enhanced Main Styles 
  For Equipment Maintenance System
*/

:root {
  /* Main color palette */
  --primary-color: #1976D2;
  --primary-light: #4791db;
  --primary-dark: #115293;
  --primary-bg: #e3f2fd;
  
  --secondary-color: #388e3c;
  --secondary-light: #5eae62;
  --secondary-dark: #276128;
  --secondary-bg: #e8f5e9;
  
  --danger-color: #f44336;
  --danger-light: #f6685e;
  --danger-dark: #d32f2f;
  --danger-bg: #ffebee;
  
  --warning-color: #ff9800;
  --warning-light: #ffac33;
  --warning-dark: #e68900;
  --warning-bg: #fff8e1;
  
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-300: #e0e0e0;
  --gray-400: #bdbdbd;
  --gray-500: #9e9e9e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  
  /* Border radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
  --shadow-lg: 0 10px 20px rgba(0,0,0,0.15), 0 3px 6px rgba(0,0,0,0.10);
  
  /* Transitions */
  --transition-fast: 0.2s ease-out;
  --transition-medium: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Font sizes */
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
}

/* Base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md);
  background-color: var(--gray-100);
  color: var(--gray-800);
  line-height: 1.6;
  transition: background-color var(--transition-medium);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--gray-900);
  margin-bottom: var(--space-md);
  font-weight: 600;
}

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

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

/* Header & Navigation */
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  background-color: white;
  padding: var(--space-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.header-container:hover {
  box-shadow: var(--shadow-md);
}

.tabs {
  display: flex;
  margin-bottom: var(--space-lg);
  border-bottom: 2px solid var(--gray-300);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.tab {
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  background-color: var(--gray-200);
  border: 1px solid var(--gray-300);
  border-bottom: none;
  border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
  margin-right: var(--space-xs);
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab:hover {
  background-color: var(--primary-bg);
  color: var(--primary-color);
}

.tab.active {
  background-color: white;
  border-bottom: 2px solid white;
  margin-bottom: -2px;
  color: var(--primary-color);
}

/* Controls & Filters */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  align-items: flex-end;
  justify-content: space-between;
}

.control-group {
  flex: 1;
  min-width: 200px;
  margin-bottom: var(--space-sm);
}

.filters-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  width: 100%;
  align-items: flex-end;
}

.date-filter-group {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

.date-filter-group label {
  margin-right: var(--space-xs);
  white-space: nowrap;
}

/* Form Elements */
label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--gray-700);
}

select, 
input, 
textarea {
  padding: var(--space-sm);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--gray-300);
  width: 100%;
  font-size: var(--font-size-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

input[type="date"] {
  min-height: 38px;
}

/* Button styles */
button {
  min-height: 38px;
  white-space: nowrap;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  border: none;
  background-color: var(--secondary-color);
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

button:hover {
  background-color: var(--secondary-dark);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(1px);
}

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

.btn-blue:hover {
  background-color: var(--primary-dark);
}

.btn-red {
  background-color: var(--danger-color);
}

.btn-red:hover {
  background-color: var(--danger-dark);
}

.btn-purple {
  background-color: #673AB7;
}

.btn-purple:hover {
  background-color: #5E35B1;
}

.btn-green {
  background-color: var(--secondary-color);
}

.btn-green:hover {
  background-color: var(--secondary-dark);
}

/* Action buttons container */
.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.action-buttons button {
  flex: 0 0 auto;
  min-width: 80px;
  font-size: var(--font-size-sm);
  padding: 4px 8px;
  width: auto;
}

/* Form layouts */
.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.form-col {
  flex: 1;
  min-width: 200px;
}

/* Card styles */
.card {
  background-color: white;
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-lg);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

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

/* Loading spinner */
.loading-spinner {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.5);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}

.spinner {
  border: 5px solid var(--gray-300);
  border-top: 5px solid var(--primary-color);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 2s linear infinite;
  box-shadow: var(--shadow-md);
}

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

/* Status indicators */
.status-pill {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.status-operational { 
  background-color: var(--secondary-bg);
  color: var(--secondary-dark);
}

.status-due-soon, .status-maintenance-due { 
  background-color: var(--warning-bg);
  color: var(--warning-dark);
}

.status-in-maintenance { 
  background-color: var(--primary-bg);
  color: var(--primary-dark);
}

.status-out-of-service { 
  background-color: var(--danger-bg);
  color: var(--danger-dark);
}

/* Animation keyframes */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Empty state styling */
.empty-state {
  text-align: center;
  padding: var(--space-lg);
  color: var(--gray-600);
  font-style: italic;
  animation: fadeIn var(--transition-medium);
}

/* Responsive layout */
@media screen and (max-width: 900px) {
  .controls {
    flex-direction: column;
    align-items: stretch;
  }
  
  .control-group {
    width: 100%;
  }
  
  /* Ensure buttons are full width on mobile */
  .controls button {
    width: 100%;
  }
  
  /* Specific layout for filter controls */
  .filters-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  
  .form-row {
    flex-direction: column;
  }
  
  .form-col {
    width: 100%;
  }
  
  .action-buttons {
    flex-direction: column;
  }
}

/* Medium screens */
@media screen and (min-width: 901px) and (max-width: 1200px) {
  .filters-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }
}

/* Dark mode support (if implemented) */
@media (prefers-color-scheme: dark) {
  :root {
    --primary-bg: #0d47a1;
    --secondary-bg: #1b5e20;
    --danger-bg: #b71c1c;
    --warning-bg: #e65100;
    --gray-100: #333333;
    --gray-200: #424242;
    --gray-800: #e0e0e0;
    --gray-900: #f5f5f5;
  }
  
  body {
    background-color: #121212;
    color: #e0e0e0;
  }
  
  .header-container,
  .card,
  .dashboard-card,
  .modal-content {
    background-color: #1e1e1e;
    color: #e0e0e0;
  }
  
  input, select, textarea {
    background-color: #333;
    color: #e0e0e0;
    border-color: #666;
  }
  
  .tab {
    background-color: #333;
    border-color: #666;
  }
  
  .tab.active {
    background-color: #1e1e1e;
    color: var(--primary-light);
  }
}