/* ===================================
   النخبة الطبية — App Stylesheet v1.0
   =================================== */

/* ============ RESET ============ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

/* ============ VARIABLES ============ */
:root {
  /* Colors */
  --gold: #C9A961;
  --gold-light: #E5C88A;
  --gold-dark: #A88A45;
  --gold-glow: rgba(201, 169, 97, 0.3);
  --black: #0A0A0A;
  --black-soft: #1A1A1A;
  --black-lighter: #2A2A2A;
  --white: #FAFAFA;
  --white-soft: #F5F5F5;
  --gray: #8A8A8A;
  --gray-light: #E5E5E5;
  --gray-lighter: #F0F0F0;
  --success: #22C55E;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: #3B82F6;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.15);
  --shadow-gold: 0 8px 24px rgba(201, 169, 97, 0.3);

  /* Radius */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-full: 999px;

  /* Spacing */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;

  /* Typography */
  --font-ar: 'Cairo', 'Tajawal', system-ui, sans-serif;
  --font-en: 'Inter', system-ui, sans-serif;

  /* Transitions */
  --t-fast: 150ms ease;
  --t-base: 250ms ease;
  --t-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Safe areas */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
}

/* ============ BASE ============ */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-ar);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
  padding-bottom: calc(76px + var(--safe-bottom));
  overscroll-behavior-y: none;
}

body.dark {
  background: var(--black);
  color: var(--white);
}

body.no-scroll {
  overflow: hidden;
  position: fixed;
  width: 100%;
}

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.125rem; }
h2 { font-size: 1.625rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p { line-height: 1.7; }

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ============ UTILITIES ============ */
.container {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

.text-center { text-align: center; }
.text-gold { color: var(--gold); }
.text-gray { color: var(--gray); }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.mt-4 { margin-top: var(--sp-4); }
.mb-4 { margin-bottom: var(--sp-4); }

/* ============ SPLASH SCREEN ============ */
.splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: linear-gradient(160deg, #0A0A0A 0%, #1A1A1A 50%, #0F0F0F 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.splash.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.splash-logo {
  width: 100px;
  height: 100px;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 52px;
  box-shadow: 0 20px 60px rgba(201, 169, 97, 0.4),
              0 0 0 20px rgba(201, 169, 97, 0.05),
              0 0 0 40px rgba(201, 169, 97, 0.03);
  animation: splashPulse 2s ease-in-out infinite;
  margin-bottom: 24px;
}

@keyframes splashPulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 20px 60px rgba(201, 169, 97, 0.4),
                0 0 0 20px rgba(201, 169, 97, 0.05),
                0 0 0 40px rgba(201, 169, 97, 0.03);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 24px 80px rgba(201, 169, 97, 0.6),
                0 0 0 24px rgba(201, 169, 97, 0.08),
                0 0 0 48px rgba(201, 169, 97, 0.04);
  }
}

.splash-title {
  color: var(--white);
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.splash-title span { color: var(--gold); }

.splash-subtitle {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 500;
  animation: fadeInUp 0.8s ease 0.5s both;
}

.splash-loader {
  position: absolute;
  bottom: 80px;
  width: 40px;
  height: 40px;
  border: 2px solid rgba(201, 169, 97, 0.2);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============ HEADER ============ */
.app-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 100;
  padding: calc(var(--safe-top) + 12px) var(--sp-5) 12px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--t-base);
}

.app-header.dark {
  background: rgba(10, 10, 10, 0.85);
  border-bottom-color: rgba(201, 169, 97, 0.15);
}

.app-header.hidden {
  transform: translateY(-100%);
}

.app-header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-header-logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(201, 169, 97, 0.35);
}

.app-header-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--black);
  letter-spacing: -0.02em;
}

.app-header.dark .app-header-title { color: var(--white); }

.app-header-title span { color: var(--gold); }

.app-header-btn {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--black);
  transition: all var(--t-fast);
}

.app-header.dark .app-header-btn {
  background: rgba(201, 169, 97, 0.1);
  color: var(--gold);
}

.app-header-btn:active {
  transform: scale(0.92);
  background: rgba(201, 169, 97, 0.2);
}

/* ============ BOTTOM NAV ============ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  right: 0;
  left: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 8px 0 calc(8px + var(--safe-bottom));
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.04);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 4px;
  color: var(--gray);
  font-size: 10.5px;
  font-weight: 600;
  transition: color var(--t-fast);
  position: relative;
  text-decoration: none;
}

.nav-item svg {
  width: 22px;
  height: 22px;
  transition: transform var(--t-fast);
}

.nav-item.active {
  color: var(--gold-dark);
}

.nav-item.active svg {
  transform: translateY(-2px);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--gold);
  border-radius: 0 0 4px 4px;
}

.nav-item:active svg {
  transform: scale(0.88);
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--r-md);
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--t-fast);
  border: none;
  text-decoration: none;
  user-select: none;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--black);
  box-shadow: 0 4px 16px rgba(201, 169, 97, 0.3);
}

.btn-primary:active {
  box-shadow: 0 2px 8px rgba(201, 169, 97, 0.4);
}

.btn-dark {
  background: linear-gradient(135deg, #1A1A1A, #0A0A0A);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.btn-outline {
  background: transparent;
  color: var(--black);
  border: 1.5px solid var(--gray-light);
}

.btn-outline:active {
  background: var(--gray-lighter);
}

.btn-ghost {
  background: rgba(0, 0, 0, 0.04);
  color: var(--black);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 17px 32px;
  font-size: 16px;
  border-radius: var(--r-lg);
}

.btn-sm {
  padding: 10px 16px;
  font-size: 13px;
  border-radius: var(--r-sm);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--r-md);
}

/* ============ CARDS ============ */
.card {
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  box-shadow: var(--shadow-sm);
  transition: all var(--t-base);
}

.card-interactive:active {
  transform: scale(0.985);
  box-shadow: var(--shadow-md);
}

.card-gold {
  border: 1px solid rgba(201, 169, 97, 0.2);
  background: linear-gradient(135deg, #FFFFFF 0%, #FEFBF6 100%);
}

/* ============ SECTION ============ */
.section {
  padding: var(--sp-8) var(--sp-5);
}

.section-header {
  text-align: center;
  margin-bottom: var(--sp-6);
}

.section-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--gold-dark);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: var(--sp-2);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--black);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--gray);
  font-size: 14px;
  margin-top: 6px;
}

/* ============ FORM ============ */
.form-group {
  margin-bottom: var(--sp-4);
}

.form-label {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--black);
  margin-bottom: var(--sp-2);
  letter-spacing: -0.01em;
}

.form-label .required { color: var(--danger); }

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--gray-light);
  border-radius: var(--r-md);
  background: var(--white);
  font-family: inherit;
  font-size: 15px;
  color: var(--black);
  transition: all var(--t-fast);
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #B0B0B0;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 169, 97, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23C9A961' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 14px center;
  padding-left: 44px;
}

.form-hint {
  font-size: 12px;
  color: var(--gray);
  margin-top: 6px;
}

.form-error {
  font-size: 12px;
  color: var(--danger);
  margin-top: 6px;
  display: none;
}

.form-error.show { display: block; }

/* ============ BADGE ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.badge-gold {
  background: rgba(201, 169, 97, 0.15);
  color: var(--gold-dark);
}

.badge-success {
  background: rgba(34, 197, 94, 0.15);
  color: #15803D;
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #B45309;
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #B91C1C;
}

.badge-info {
  background: rgba(59, 130, 246, 0.15);
  color: #1D4ED8;
}

.badge-gray {
  background: rgba(138, 138, 138, 0.15);
  color: var(--gray);
}

/* ============ TOAST ============ */
.toast-container {
  position: fixed;
  top: calc(var(--safe-top) + 20px);
  right: 20px;
  left: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--black);
  color: var(--white);
  padding: 14px 18px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: all;
  animation: toastIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-right: 4px solid var(--gold);
  max-width: 500px;
  margin: 0 auto;
  width: 100%;
}

.toast-success { border-right-color: var(--success); }
.toast-error { border-right-color: var(--danger); }
.toast-warning { border-right-color: var(--warning); }
.toast-info { border-right-color: var(--info); }

.toast.hiding {
  animation: toastOut 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
  line-height: 1.4;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
}

/* ============ BOTTOM SHEET ============ */
.sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--t-base);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.sheet-overlay.active {
  opacity: 1;
  visibility: visible;
}

.bottom-sheet {
  position: fixed;
  bottom: 0;
  right: 0;
  left: 0;
  z-index: 9001;
  background: var(--white);
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  padding: var(--sp-3) var(--sp-5) calc(var(--sp-5) + var(--safe-bottom));
  transform: translateY(100%);
  transition: transform var(--t-slow);
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.15);
}

.bottom-sheet.active {
  transform: translateY(0);
}

.sheet-handle {
  width: 40px;
  height: 4px;
  background: var(--gray-light);
  border-radius: var(--r-full);
  margin: 0 auto var(--sp-5);
}

.sheet-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: var(--sp-4);
  text-align: center;
  letter-spacing: -0.02em;
}

/* ============ LOADER ============ */
.loader-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 9500;
  display: none;
  align-items: center;
  justify-content: center;
}

.loader-overlay.active {
  display: flex;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(201, 169, 97, 0.2);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ============ SKELETON ============ */
.skeleton {
  background: linear-gradient(90deg, #F0F0F0 0%, #E5E5E5 50%, #F0F0F0 100%);
  background-size: 200% 100%;
  border-radius: var(--r-sm);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 14px;
  margin-bottom: 8px;
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: 12px;
}

.skeleton-card {
  height: 120px;
  border-radius: var(--r-lg);
}

/* ============ ANIMATIONS ============ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ DIVIDER ============ */
.divider {
  height: 1px;
  background: var(--gray-light);
  margin: var(--sp-5) 0;
  border: none;
}

.divider-text {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  color: var(--gray);
  font-size: 12px;
  font-weight: 600;
  margin: var(--sp-5) 0;
}

.divider-text::before,
.divider-text::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-light);
}

/* ============ EMPTY STATE ============ */
.empty-state {
  text-align: center;
  padding: var(--sp-10) var(--sp-5);
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: var(--sp-4);
  opacity: 0.6;
}

.empty-state-title {
  font-size: 1.125rem;
  font-weight: 800;
  margin-bottom: var(--sp-2);
  color: var(--black);
}

.empty-state-text {
  color: var(--gray);
  font-size: 14px;
  max-width: 300px;
  margin: 0 auto var(--sp-5);
  line-height: 1.6;
}

/* ============ RESPONSIVE ============ */
@media (min-width: 640px) {
  .container { padding: 0 var(--sp-6); }
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.875rem; }
  .section { padding: var(--sp-12) var(--sp-6); }
}

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