/**
 * Car License Plate Lookup System - Responsive Styles
 * Mobile-first approach with responsive breakpoints
 * Requirements: 8.1, 8.2, 8.4, 8.5
 */

/* ===== CSS Reset & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Color Palette */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --danger-color: #dc2626;
  --danger-hover: #b91c1c;
  --success-color: #16a34a;
  --error-color: #dc2626;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --border-color: #d1d5db;
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.5;
  
  /* Touch Targets - Requirement 8.2: Minimum 44x44px */
  --min-touch-target: 44px;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
}

html {
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-family);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--bg-light);
  /* Requirement 8.4: Ensure text readability without horizontal scrolling */
  overflow-x: hidden;
}

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===== Header ===== */
header {
  background-color: var(--primary-color);
  color: var(--bg-white);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow-md);
  position: relative;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  word-wrap: break-word;
}

.header-actions {
  position: absolute;
  top: 50%;
  right: var(--spacing-md);
  transform: translateY(-50%);
}

.btn-config {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--bg-white);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 0.875rem;
  transition: background-color 0.2s;
}

.btn-config:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

/* ===== Configuration Panel ===== */
.config-panel {
  background-color: #f8f9fa;
  border: 2px solid #e9ecef;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.config-panel h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.api-status {
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  padding: 0.5rem;
  background-color: white;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.config-content p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.config-content a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

.config-content a:hover {
  text-decoration: underline;
}

.config-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.btn-secondary {
  background-color: #6c757d;
  color: var(--bg-white);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-secondary:hover {
  background-color: #5a6268;
}

/* ===== Main Container ===== */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
}

/* ===== Section Styles ===== */
section {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.record-counter {
  color: var(--text-secondary);
  font-size: 0.9em;
  font-weight: normal;
}

/* ===== Form Styles ===== */
/* Requirement 8.5: Vertical stacking for mobile */
.add-record-form,
.search-controls {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-primary);
}

/* Form Inputs - Requirement 8.2: Touch-friendly sizes */
.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="file"] {
  width: 100%;
  min-height: var(--min-touch-target);
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input::placeholder {
  color: var(--text-secondary);
}

/* File Input Styling */
.form-group input[type="file"] {
  padding: var(--spacing-sm);
  cursor: pointer;
}

/* ===== Button Styles ===== */
/* Requirement 8.2: Touch-friendly button sizes (44x44px minimum) */
.btn-primary,
.btn-delete {
  min-height: var(--min-touch-target);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  /* Ensure buttons are touch-friendly */
  touch-action: manipulation;
}

.btn-primary {
  width: 100%;
  background-color: var(--primary-color);
  color: var(--bg-white);
}

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

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

.btn-primary:disabled {
  background-color: var(--text-secondary);
  cursor: not-allowed;
}

.btn-delete {
  background-color: var(--danger-color);
  color: var(--bg-white);
  width: 100%;
}

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

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

/* ===== Records Container ===== */
/* Requirement 8.5: Vertical stacking for mobile devices */
.records-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

/* ===== Record Card Styles ===== */
.record-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

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

.record-image-container {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--bg-light);
}

.record-image-container.no-image {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f0f0f0;
  border: 2px dashed #ccc;
}

.no-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.record-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
  transition: transform 0.2s;
}

.record-image:hover {
  transform: scale(1.05);
}

.record-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.record-field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.record-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.record-value {
  font-size: 1rem;
  color: var(--text-primary);
  /* Requirement 8.4: Ensure text readability */
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* ===== No Results Message ===== */
.no-results {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.no-results p {
  font-size: 1.125rem;
}

/* ===== Message Container (Success/Error) ===== */
.message-container {
  position: fixed;
  top: var(--spacing-md);
  right: var(--spacing-md);
  left: var(--spacing-md);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.message {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: slideIn 0.3s ease-out;
}

.message-success {
  background-color: var(--success-color);
  color: var(--bg-white);
}

.message-error {
  background-color: var(--error-color);
  color: var(--bg-white);
}

.message-info {
  background-color: #2196F3;
  color: var(--bg-white);
}

.message-warning {
  background-color: #ff9800;
  color: var(--bg-white);
}

.message-fade-out {
  animation: fadeOut 0.3s ease-out forwards;
}

@keyframes slideIn {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* ===== Image Modal ===== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background-color: transparent;
  border: none;
  color: var(--bg-white);
  font-size: 2.5rem;
  font-weight: 300;
  cursor: pointer;
  /* Requirement 8.2: Touch-friendly close button */
  min-width: var(--min-touch-target);
  min-height: var(--min-touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s;
}

.modal-close:hover {
  opacity: 0.7;
}

#modalImage {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

/* ===== Responsive Breakpoints ===== */

/* Tablet: 768px and up */
@media (min-width: 768px) {
  header h1 {
    font-size: 2rem;
  }
  
  main {
    padding: var(--spacing-xl);
  }
  
  section {
    padding: var(--spacing-xl);
  }
  
  section h2 {
    font-size: 1.5rem;
  }
  
  /* Two-column layout for search controls */
  .search-controls {
    flex-direction: row;
    gap: var(--spacing-lg);
  }
  
  .search-controls .form-group {
    flex: 1;
  }
  
  /* Two-column grid for records */
  .records-container {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  
  /* Horizontal layout for record cards */
  .record-card {
    flex-direction: row;
    align-items: flex-start;
  }
  
  .record-image-container {
    width: 200px;
    flex-shrink: 0;
  }
  
  .record-details {
    flex: 1;
  }
  
  .btn-delete {
    width: auto;
    align-self: flex-start;
  }
  
  /* Message positioning for larger screens */
  .message-container {
    left: auto;
    max-width: 400px;
  }
}

/* Desktop: 1024px and up */
@media (min-width: 1024px) {
  header h1 {
    font-size: 2.25rem;
  }
  
  /* Three-column layout for add form */
  .add-record-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  
  .add-record-form .form-group:first-child {
    grid-column: 1 / -1;
  }
  
  .add-record-form .btn-primary {
    grid-column: 1 / -1;
    width: auto;
    justify-self: flex-start;
    min-width: 200px;
  }
  
  /* Three-column grid for records */
  .records-container {
    grid-template-columns: repeat(3, 1fr);
  }
  
  /* Vertical layout for record cards on desktop */
  .record-card {
    flex-direction: column;
  }
  
  .record-image-container {
    width: 100%;
  }
  
  .btn-delete {
    width: 100%;
  }
}

/* Large Desktop: 1440px and up */
@media (min-width: 1440px) {
  /* Four-column grid for records on very large screens */
  .records-container {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== Print Styles ===== */
@media print {
  header {
    background-color: transparent;
    color: var(--text-primary);
    box-shadow: none;
  }
  
  .add-record-section,
  .search-section,
  .btn-delete,
  .message-container {
    display: none;
  }
  
  .record-card {
    break-inside: avoid;
  }
}


/* ===== Authentication Styles ===== */
.user-status {
  margin-right: var(--spacing-sm);
  font-size: 0.875rem;
}

.login-modal {
  max-width: 400px;
  padding: var(--spacing-xl);
}

.login-modal h2 {
  margin-top: 0;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.login-modal .form-group {
  margin-bottom: var(--spacing-md);
}

.login-modal label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.login-modal input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--radius-sm);
  font-size: 1rem;
}

.login-modal input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.login-modal button[type="submit"] {
  width: 100%;
  margin-top: var(--spacing-md);
}

.login-help {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid #e9ecef;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.login-help code {
  background-color: #f8f9fa;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: monospace;
  color: var(--primary-color);
}

.error-message {
  color: var(--error-color);
  background-color: #fee;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  margin-top: var(--spacing-sm);
  font-size: 0.875rem;
}

.warning-banner {
  background-color: #fff3cd;
  color: #856404;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
  border: 1px solid #ffeaa7;
}

.config-section {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid #e9ecef;
}

.config-section:last-child {
  border-bottom: none;
}

.config-section h4 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-size: 1.1rem;
}

/* Hide delete buttons by default (shown only for admin) */
.btn-delete {
  display: none;
}


/* ===== Privacy & Redaction Styles ===== */
.record-value.redacted {
  color: #999;
  font-style: italic;
  letter-spacing: 0.1em;
}

.privacy-note {
  margin-top: var(--spacing-sm);
  padding: 0.5rem;
  background-color: #fff3cd;
  border: 1px solid #ffc107;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: #856404;
  text-align: center;
}

.privacy-note::before {
  content: "";
  margin-right: 0.25rem;
}