/* BloodEgypt - Modern CSS Design 2025 */
/* Following best practices: CSS Grid, Flexbox, Custom Properties, Modern Typography */

/* ===== CSS CUSTOM PROPERTIES (CSS VARIABLES) ===== */
:root {
  /* Colors - Modern Red Palette */
  --primary-red: #dc2626;
  --primary-red-dark: #b91c1c;
  --primary-red-light: #fecaca;
  --secondary-red: #ef4444;
  
  /* Neutral Colors */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Typography */
  --font-family: 'Cairo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Layout */
  --max-width: 1200px;
  --header-height: 4rem;
  --mobile-padding: var(--space-4);
  --desktop-padding: var(--space-8);
}

/* ===== RESET & BASE STYLES ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
  min-height: 100vh;
  direction: rtl;
  overflow-x: hidden;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: var(--white);
}

.blood-drop-loader {
  font-size: 4rem;
  animation: pulse 2s ease-in-out infinite;
  display: block;
  margin-bottom: var(--space-4);
}

.loading-content h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.loading-content p {
  font-size: var(--font-size-lg);
  opacity: 0.9;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

/* ===== APP CONTAINER ===== */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: var(--max-width);
  margin: 0 auto;
  background: var(--white);
  box-shadow: var(--shadow-xl);
}

/* ===== HEADER ===== */
.app-header {
  background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-dark) 100%);
  color: var(--white);
  padding: var(--space-4) var(--mobile-padding);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-icon {
  font-size: var(--font-size-3xl);
  animation: heartbeat 2s ease-in-out infinite;
}

.logo-text {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.header-subtitle {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  text-align: center;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  position: relative;
  overflow: hidden;
}

/* ===== SCREENS ===== */
.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 100%;
  padding: var(--space-6) var(--mobile-padding);
  opacity: 0;
  visibility: hidden;
  transform: translateX(100%);
  transition: all var(--transition-normal);
}

.screen.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  position: relative;
}

/* ===== HOME SCREEN ===== */
.hero-section {
  text-align: center;
  padding: var(--space-8) 0;
  margin-bottom: var(--space-8);
}

.hero-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--gray-600);
  margin-bottom: var(--space-6);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-visual {
  margin-bottom: var(--space-8);
}

.blood-drops {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

.drop {
  font-size: var(--font-size-2xl);
  animation: float 3s ease-in-out infinite;
}

.drop-1 { animation-delay: 0s; }
.drop-2 { animation-delay: 0.5s; }
.drop-3 { animation-delay: 1s; }

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

/* ===== ACTION CARDS ===== */
.action-cards {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-red), var(--secondary-red));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-red-light);
}

.card-icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-4);
  display: block;
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.card-description {
  color: var(--gray-600);
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.card-arrow {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  font-size: var(--font-size-lg);
  color: var(--primary-red);
  opacity: 0;
  transform: translateX(-10px);
  transition: all var(--transition-normal);
}

.card:hover .card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ===== FEATURES SECTION ===== */
.features-section {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-top: var(--space-8);
}

.feature {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--gray-50);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--gray-700);
}

.feature-icon {
  font-size: var(--font-size-base);
}

/* ===== SCREEN HEADER ===== */
.screen-header {
  margin-bottom: var(--space-8);
  text-align: center;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--gray-100);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-4);
}

.back-btn:hover {
  background: var(--gray-200);
  transform: translateX(2px);
}

.screen-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.screen-subtitle {
  font-size: var(--font-size-base);
  color: var(--gray-600);
}

/* ===== MODERN FORMS ===== */
.form-container {
  max-width: 600px;
  margin: 0 auto;
}

.modern-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.form-section {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-6);
}

.section-icon {
  font-size: var(--font-size-xl);
}

/* ===== BLOOD TYPE GRID ===== */
.blood-type-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.blood-type-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: var(--gray-50);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 80px;
}

.blood-type-card:hover {
  background: var(--primary-red-light);
  border-color: var(--primary-red);
  transform: translateY(-2px);
}

.blood-type-card.selected {
  background: var(--primary-red);
  border-color: var(--primary-red-dark);
  color: var(--white);
  transform: scale(1.05);
}

.blood-type {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.blood-label {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

/* ===== INPUT GROUPS ===== */
.input-group {
  margin-bottom: var(--space-6);
}

.input-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

.modern-input,
.modern-select {
  width: 100%;
  padding: var(--space-4);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-family: inherit;
  background: var(--white);
  transition: all var(--transition-fast);
}

.modern-input:focus,
.modern-select:focus {
  outline: none;
  border-color: var(--primary-red);
  box-shadow: 0 0 0 3px var(--primary-red-light);
}

.input-help {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  margin-top: var(--space-2);
}

/* ===== LOCATION CARD ===== */
.location-card {
  width: 100%;
  background: var(--gray-50);
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.location-card:hover {
  background: var(--primary-red-light);
  border-color: var(--primary-red);
}

.location-content {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.location-icon {
  font-size: var(--font-size-2xl);
  color: var(--primary-red);
}

.location-text {
  flex: 1;
  text-align: right;
}

.location-text span {
  display: block;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.location-text small {
  font-size: var(--font-size-xs);
  color: var(--gray-600);
}

/* ===== SETTINGS ===== */
.setting-item {
  margin-bottom: var(--space-6);
}

.setting-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

.setting-help {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  margin-top: var(--space-2);
}

/* ===== TOGGLE SWITCH ===== */
.toggle-switch {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.toggle-switch input {
  display: none;
}

.toggle-slider {
  position: relative;
  width: 48px;
  height: 24px;
  background: var(--gray-300);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  background: var(--white);
  border-radius: 50%;
  transition: transform var(--transition-fast);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--primary-red);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(-24px);
}

.toggle-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-700);
}

/* ===== BUTTONS ===== */
.primary-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-4) var(--space-6);
  background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-dark) 100%);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.primary-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.primary-btn:active {
  transform: translateY(0);
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.urgent-btn {
  background: linear-gradient(135deg, var(--error) 0%, #dc2626 100%);
  animation: urgentPulse 2s ease-in-out infinite;
}

@keyframes urgentPulse {
  0%, 100% { box-shadow: var(--shadow-md); }
  50% { box-shadow: 0 0 20px var(--error); }
}

.btn-icon {
  font-size: var(--font-size-lg);
}

/* ===== STATUS MESSAGES ===== */
.status-message {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-top: var(--space-4);
  display: none;
}

.status-message.success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.status-message.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.status-message.warning {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid #fed7aa;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (min-width: 640px) {
  .app-header {
    padding: var(--space-6) var(--desktop-padding);
  }
  
  .screen {
    padding: var(--space-8) var(--desktop-padding);
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .action-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .blood-type-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }
}

@media (min-width: 768px) {
  .header-content {
    flex-direction: row;
    justify-content: space-between;
  }
  
  .features-section {
    gap: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .main-content {
    padding: var(--space-8);
  }
  
  .form-container {
    max-width: 700px;
  }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  /* Dark mode support can be added here */
}

/* ===== PRINT STYLES ===== */
@media print {
  .loading-screen,
  .app-header,
  .back-btn {
    display: none !important;
  }
  
  .app-container {
    box-shadow: none;
  }
  
  .screen {
    position: static !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }
}

/* Request Details Screen */
.request-details-container {
    padding: 1rem;
}

.request-card {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
}

.request-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--gray-100);
}

.blood-type-display {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-red), #b91c1c);
    border-radius: 50%;
    color: white;
    font-weight: bold;
}

.blood-type-large {
    font-size: 1.5rem;
    font-weight: 700;
}

.urgency-badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    background: var(--success-green);
    color: white;
}

.urgency-badge.urgent {
    background: var(--primary-red);
}

.urgency-badge.critical {
    background: #dc2626;
    animation: pulse 2s infinite;
}

.patient-info {
    margin-bottom: 1.5rem;
}

.info-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--primary-red);
    font-size: 1.1rem;
    font-weight: 600;
}

.info-icon {
    font-size: 1.2rem;
}

.info-grid {
    display: grid;
    gap: 0.75rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--gray-50);
    border-radius: 8px;
}

.info-label {
    font-weight: 500;
    color: var(--gray-600);
}

.info-value {
    font-weight: 600;
    color: var(--gray-900);
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #b91c1c;
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--gray-50);
    color: var(--primary-red);
    border: 2px solid var(--primary-red);
}

.btn-secondary:hover {
    background: var(--primary-red);
    color: white;
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.1rem;
}

.request-status {
    padding-top: 1rem;
    border-top: 2px solid var(--gray-100);
}

.status-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.status-icon {
    font-size: 1.1rem;
}

.status-text {
    color: var(--gray-600);
    font-size: 0.9rem;
}