/**
 * MAIN CSS - Quản Lý Thiết Bị Trạm Kinh Môn (Vinacomin)
 * Giao diện sáng (Light theme), chuyên nghiệp, đường nét tinh tế
 */

:root {
  /* Brand colors - Vinacomin Coal & Precision Blue */
  --primary: #1a56db;
  --primary-hover: #1e429f;
  --primary-light: #ebf5ff;
  --primary-border: #bfdbfe;
  
  /* Status colors */
  --success: #059669;
  --success-light: #ecfdf5;
  --success-border: #a7f3d0;
  
  --warning: #d97706;
  --warning-light: #fffbeb;
  --warning-border: #fde68a;
  
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --danger-border: #fecaca;

  --info: #0284c7;
  --info-light: #f0f9ff;
  --info-border: #bae6fd;

  /* Neutral tones */
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-hover: #f8fafc;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-white: #ffffff;

  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;

  /* Depth & 3D Lighting Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-3d: 
    0 2px 4px rgba(15, 23, 42, 0.04),
    0 8px 16px rgba(15, 23, 42, 0.06),
    0 16px 32px rgba(15, 23, 42, 0.04);
  --shadow-3d-hover: 
    0 4px 8px rgba(15, 23, 42, 0.05),
    0 14px 28px rgba(15, 23, 42, 0.09),
    0 24px 48px rgba(15, 23, 42, 0.07);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 26px;

  --transition-normal: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html, body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  font-family: var(--font-family);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* App Wrapper */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

/* Responsive Grid Utility Classes */
.responsive-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.responsive-grid-detail {
  display: grid;
  grid-template-columns: 2fr 1.1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .responsive-grid-2,
  .responsive-grid-detail {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }
}

/* Header & Top Navigation Bar */
.top-navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  padding: 0.75rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  cursor: pointer;
}

.brand-logo-badge {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #1a56db 0%, #0284c7 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.5px;
  box-shadow: 0 4px 10px rgba(26, 86, 219, 0.35);
}

.brand-text-container {
  display: flex;
  flex-direction: column;
}

.brand-company {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700;
  color: var(--text-secondary);
}

.brand-station {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-item-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
}

.nav-item-btn:hover {
  background: var(--bg-subtle);
  color: var(--primary);
  border-color: var(--primary-border);
}

.nav-item-btn.active {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

.nav-item-btn.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #1e429f 100%);
  color: white;
  border: none;
  box-shadow: 0 4px 10px rgba(26, 86, 219, 0.25);
}

.nav-item-btn.btn-primary:hover {
  box-shadow: 0 6px 14px rgba(26, 86, 219, 0.35);
  transform: translateY(-1px);
}

/* Main Content Host */
.main-content {
  flex: 1;
  padding: 1.75rem;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

/* Page Headers */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-title-group h1 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.page-title-group p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.badge-active {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.badge-warning {
  background: var(--warning-light);
  color: var(--warning);
  border: 1px solid var(--warning-border);
}

.badge-danger {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}

.badge-info {
  background: var(--info-light);
  color: var(--info);
  border: 1px solid var(--info-border);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* Form inputs & controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-medium);
  font-size: 0.92rem;
  color: var(--text-primary);
  background: var(--bg-card);
  transition: var(--transition-normal);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
}

.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-medium);
  color: var(--text-secondary);
}
.btn-secondary:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.btn-success {
  background: var(--success);
  color: white;
}
.btn-success:hover {
  background: #047857;
}

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

/* Tabs */
.tabs-header {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 1.5rem;
}

.tab-btn {
  padding: 0.75rem 1.25rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition-normal);
}

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

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* App Footer */
.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-light);
  padding: 1.25rem 2rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: white;
}