/**
 * Standardized Button Color System
 * VehiScan RFID Access Control
 * 
 * Usage: Apply these classes to buttons for consistent styling
 * across the entire application.
 */

:root {
  /* Primary Colors - Main actions */
  --btn-primary-bg: #2563eb;
  --btn-primary-hover: #1d4ed8;
  --btn-primary-text: #ffffff;
  
  /* Secondary Colors - Cancel, Back */
  --btn-secondary-bg: #64748b;
  --btn-secondary-hover: #475569;
  --btn-secondary-text: #ffffff;
  
  /* Success Colors - Approve, Activate, Confirm */
  --btn-success-bg: #16a34a;
  --btn-success-hover: #15803d;
  --btn-success-text: #ffffff;
  
  /* Danger Colors - Delete, Reject, Remove */
  --btn-danger-bg: #dc2626;
  --btn-danger-hover: #b91c1c;
  --btn-danger-text: #ffffff;
  
  /* Warning Colors - Suspend, Flag, Caution */
  --btn-warning-bg: #d97706;
  --btn-warning-hover: #b45309;
  --btn-warning-text: #ffffff;
  
  /* Info Colors - Details, View, Export */
  --btn-info-bg: #0891b2;
  --btn-info-hover: #0e7490;
  --btn-info-text: #ffffff;
  
  /* SweetAlert2 Button Colors (for confirmButtonColor) */
  --swal-primary: #3b82f6;
  --swal-secondary: #6b7280;
  --swal-success: #10b981;
  --swal-danger: #ef4444;
  --swal-warning: #f59e0b;
  --swal-info: #14b8a6;
}

/* ===== BASE BUTTON STYLES ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25rem;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.1s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus {
  outline: 2px solid transparent;
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== PRIMARY BUTTON ===== */
/* Use for: Save, Submit, Confirm, Login, Create */
.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--btn-primary-hover);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

/* ===== SECONDARY BUTTON ===== */
/* Use for: Cancel, Back, Close, Dismiss */
.btn-secondary {
  background-color: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border: 1px solid rgba(15, 23, 42, 0.15);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--btn-secondary-hover);
  box-shadow: 0 2px 8px rgba(107, 114, 128, 0.3);
}

/* ===== SUCCESS BUTTON ===== */
/* Use for: Approve, Activate, Enable, Confirm */
.btn-success {
  background-color: var(--btn-success-bg);
  color: var(--btn-success-text);
}

.btn-success:hover:not(:disabled) {
  background-color: var(--btn-success-hover);
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

/* ===== DANGER BUTTON ===== */
/* Use for: Delete, Reject, Remove, Deactivate */
.btn-danger {
  background-color: var(--btn-danger-bg);
  color: var(--btn-danger-text);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--btn-danger-hover);
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

/* ===== WARNING BUTTON ===== */
/* Use for: Suspend, Flag, Caution, Warning */
.btn-warning {
  background-color: var(--btn-warning-bg);
  color: var(--btn-warning-text);
}

.btn-warning:hover:not(:disabled) {
  background-color: var(--btn-warning-hover);
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

/* ===== INFO BUTTON ===== */
/* Use for: Details, View, Info, Export */
.btn-info {
  background-color: var(--btn-info-bg);
  color: var(--btn-info-text);
}

.btn-info:hover:not(:disabled) {
  background-color: var(--btn-info-hover);
  box-shadow: 0 2px 8px rgba(20, 184, 166, 0.3);
}

/* ===== BUTTON SIZES ===== */
.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

/* ===== OUTLINE VARIANTS ===== */
.btn-outline-primary {
  background-color: transparent;
  color: var(--btn-primary-bg);
  border: 2px solid var(--btn-primary-bg);
}

.btn-outline-primary:hover:not(:disabled) {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}

.btn-outline-secondary {
  background-color: transparent;
  color: var(--btn-secondary-bg);
  border: 2px solid var(--btn-secondary-bg);
}

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

.btn-outline-danger {
  background-color: transparent;
  color: var(--btn-danger-bg);
  border: 2px solid var(--btn-danger-bg);
}

.btn-outline-danger:hover:not(:disabled) {
  background-color: var(--btn-danger-bg);
  color: var(--btn-danger-text);
}

/* ===== ICON BUTTONS ===== */
.btn-icon {
  padding: 0.625rem;
  aspect-ratio: 1;
  border-radius: 0.5rem;
}

.btn-icon-sm {
  padding: 0.375rem;
  font-size: 0.75rem;
}

/* ===== LOADING STATE ===== */
.btn-loading {
  position: relative;
  pointer-events: none;
}

.btn-loading::before {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

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

/* ===== UTILITY CLASSES ===== */
.btn-block {
  display: flex;
  width: 100%;
}

.btn-group {
  display: inline-flex;
  gap: 0.5rem;
}

.btn-group .btn {
  margin: 0;
}

/* ===== DARK MODE SUPPORT ===== */
body.dark .btn-secondary {
  background-color: #374151;
  border-color: rgba(148, 163, 184, 0.35);
}

body.dark .btn-secondary:hover:not(:disabled) {
  background-color: #1f2937;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 640px) {
  .btn {
    font-size: 0.8125rem;
    padding: 0.5rem 1rem;
  }
  
  .btn-lg {
    font-size: 0.875rem;
    padding: 0.75rem 1.5rem;
  }
}

/* TA compatibility aliases consolidated into `assets/css/system.css`.
   Kept here previously for backward compatibility, but system.css now
   provides the single authoritative definitions. */