/**
 * Dr. Helmy Badawy Pharmacies - Design System Tokens & Base Components
 * Official Brand: صيدليات دكتور حلمي بدوي | Dr. Helmy Badawy Pharmacies
 * Arabic-first, Strict CSP Compliant (Zero external fonts/CDNs), Fully Accessible
 */

:root {
  /* Brand Palette - Clinical Emerald & Teal + Trust Navy */
  --color-primary: #0D9488;         /* Teal 600 - Main brand */
  --color-primary-hover: #0F766E;   /* Teal 700 */
  --color-primary-active: #115E59;  /* Teal 800 */
  --color-primary-light: #CCFBF1;   /* Teal 100 */
  --color-primary-surface: #F0FDFA; /* Teal 50 */
  
  --color-accent: #15803D;          /* Emerald 700 - Clinical authority */
  --color-accent-hover: #166534;    /* Emerald 800 */
  --color-accent-light: #DCFCE7;    /* Emerald 100 */

  --color-trust: #0284C7;           /* Sky 600 - Medical trust */
  --color-trust-light: #E0F2FE;     /* Sky 100 */

  /* Neutral & Surface Palette */
  --color-bg: #F8FAFC;              /* Slate 50 - Base app background */
  --color-surface: #FFFFFF;         /* Pure White - Cards & sheets */
  --color-surface-hover: #F1F5F9;   /* Slate 100 */
  --color-surface-subtle: #F8FAFC;  /* Slate 50 */
  
  --color-text-main: #0F172A;       /* Slate 900 - Primary readable text */
  --color-text-muted: #475569;      /* Slate 600 - Supporting text */
  --color-text-subtle: #64748B;     /* Slate 500 - Metadata & timestamps */
  --color-text-disabled: #94A3B8;   /* Slate 400 */
  --color-text-inverse: #FFFFFF;    /* Pure White */

  --color-border: #E2E8F0;          /* Slate 200 - Card & input borders */
  --color-border-strong: #CBD5E1;   /* Slate 300 - Active borders */
  --color-border-focus: #0D9488;    /* Primary brand focus ring */

  /* Semantics */
  --color-success: #16A34A;
  --color-success-bg: #DCFCE7;
  --color-success-border: #86EFAC;
  --color-success-text: #14532D;

  --color-warning: #D97706;
  --color-warning-bg: #FEF3C7;
  --color-warning-border: #FDE68A;
  --color-warning-text: #78350F;

  --color-danger: #DC2626;
  --color-danger-bg: #FEE2E2;
  --color-danger-border: #FCA5A5;
  --color-danger-text: #7F1D1D;

  --color-info: #0284C7;
  --color-info-bg: #E0F2FE;
  --color-info-border: #7DD3FC;
  --color-info-text: #075985;

  --color-unavailable: #64748B;
  --color-unavailable-bg: #F1F5F9;
  --color-unavailable-border: #CBD5E1;
  --color-unavailable-text: #475569;

  /* Typography Scale */
  --font-family-arabic: 'Cairo', system-ui, -apple-system, 'Segoe UI', Tahoma, 'Noto Sans Arabic', sans-serif;
  --font-family-latin: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-family-mono: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-black: 800;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Spacing Scale (4px/8px rhythm) */
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */

  /* Border Radius */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Elevation Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.07), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
  --shadow-inner: inset 0 2px 4px 0 rgba(15, 23, 42, 0.05);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout Breakpoints and Max Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
}

/* Base Styles & Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family-arabic);
  font-size: 16px;
  line-height: var(--leading-normal);
  color: var(--color-text-main);
  background-color: var(--color-bg);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Accessibility & Focus Rings */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* Directionality Helpers */
[dir="rtl"] {
  text-align: right;
}

[dir="ltr"], .dir-ltr {
  direction: ltr;
  text-align: left;
}

.font-mono {
  font-family: var(--font-family-mono);
  direction: ltr;
  display: inline-block;
}

/* Button Component System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-family-arabic);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  min-height: 44px; /* Touch target minimum */
}

.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed !important;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-active);
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text-main);
  border-color: var(--color-border);
}
.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-surface-hover);
  border-color: var(--color-border-strong);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn-accent:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary-surface);
}

.btn-danger {
  background-color: var(--color-danger);
  color: var(--color-text-inverse);
}
.btn-danger:hover:not(:disabled) {
  background-color: #B91C1C;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-muted);
}
.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-surface-hover);
  color: var(--color-text-main);
}

.btn-sm {
  min-height: 36px;
  padding: 0.375rem 0.75rem;
  font-size: var(--text-sm);
}

.btn-lg {
  min-height: 52px;
  padding: 0.875rem 1.75rem;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
}

.btn-block {
  width: 100%;
  white-space: normal;
  text-align: center;
}

/* Badge Component System */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  line-height: 1;
  white-space: nowrap;
  border: 1px solid transparent;
}

.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
  border-color: var(--color-success-border);
}

.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning-text);
  border-color: var(--color-warning-border);
}

.badge-danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger-text);
  border-color: var(--color-danger-border);
}

.badge-info {
  background-color: var(--color-info-bg);
  color: var(--color-info-text);
  border-color: var(--color-info-border);
}

.badge-neutral {
  background-color: var(--color-surface-hover);
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.badge-unavailable {
  background-color: var(--color-unavailable-bg);
  color: var(--color-unavailable-text);
  border-color: var(--color-unavailable-border);
}

/* Card Component System */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  overflow: hidden;
}

.card:hover {
  border-color: var(--color-border-strong);
}

.card-interactive:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-subtle);
}

/* Form Controls & Inputs */
.form-group {
  margin-bottom: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-main);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

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

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.65rem 0.875rem;
  font-family: var(--font-family-arabic);
  font-size: var(--text-base);
  color: var(--color-text-main);
  background-color: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-height: 44px;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.form-input:disabled, .form-select:disabled, .form-textarea:disabled {
  background-color: var(--color-surface-hover);
  color: var(--color-text-disabled);
  cursor: not-allowed;
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--color-text-disabled);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  line-height: var(--leading-normal);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger);
  font-weight: var(--font-medium);
}

/* Custom File Upload */
.file-upload-box {
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  background-color: var(--color-surface-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.file-upload-box:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-surface);
}

.file-upload-box input[type="file"] {
  display: none;
}

/* Unit Pill / Segmented Selector */
.unit-selector {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.unit-pill {
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text-main);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.unit-pill:hover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-surface);
  color: var(--color-primary);
}

.unit-pill.active {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

/* Quantity Stepper */
.stepper {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  overflow: hidden;
  min-height: 42px;
}

.stepper-btn {
  background-color: transparent;
  border: none;
  color: var(--color-text-main);
  width: 38px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  user-select: none;
}

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

.stepper-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.stepper-input {
  width: 48px;
  border: none;
  border-inline-start: 1px solid var(--color-border);
  border-inline-end: 1px solid var(--color-border);
  text-align: center;
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text-main);
  height: 42px;
  font-family: var(--font-family-mono);
  -moz-appearance: textfield;
}

.stepper-input::-webkit-outer-spin-button,
.stepper-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Modal & Dialog System */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal.active {
  display: flex;
  opacity: 1;
}

.modal-content {
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  position: relative;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background-color: var(--color-surface);
  z-index: 10;
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-main);
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-subtle);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text-main);
}

.modal-body {
  padding: var(--space-6);
  flex: 1;
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  background-color: var(--color-surface-subtle);
  position: sticky;
  bottom: 0;
  z-index: 10;
}

/* Mobile Bottom Sheet on small viewports */
@media (max-width: 640px) {
  .modal {
    align-items: flex-end;
    padding: 0;
  }
  .modal-content {
    max-width: 100%;
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    max-height: 85vh;
  }
}

/* Order Progress Stepper */
.progress-stepper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  margin: var(--space-6) 0;
  padding: 0 var(--space-2);
}

.progress-stepper::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 30px;
  right: 30px;
  height: 3px;
  background-color: var(--color-border);
  z-index: 1;
}

.stepper-step {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.stepper-circle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  transition: all var(--transition-normal);
}

.stepper-step.completed .stepper-circle {
  background-color: var(--color-success);
  border-color: var(--color-success);
  color: var(--color-text-inverse);
}

.stepper-step.active .stepper-circle {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}

.stepper-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-subtle);
  max-width: 80px;
}

.stepper-step.active .stepper-label,
.stepper-step.completed .stepper-label {
  color: var(--color-text-main);
  font-weight: var(--font-bold);
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.empty-state-icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-surface);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--space-2);
}

.empty-state-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-main);
}

.empty-state-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 420px;
  line-height: var(--leading-relaxed);
}

/* Alerts and Notifications */
.alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.alert-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success-border);
  color: var(--color-success-text);
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning-border);
  color: var(--color-warning-text);
}

.alert-danger {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger-text);
}

.alert-info {
  background-color: var(--color-info-bg);
  border-color: var(--color-info-border);
  color: var(--color-info-text);
}

/* Skeleton Loading State */
.skeleton {
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-muted { color: var(--color-text-muted); }
.text-subtle { color: var(--color-text-subtle); }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.font-bold { font-weight: var(--font-bold); }
.font-semibold { font-weight: var(--font-semibold); }
.w-full { width: 100%; }
.hidden,
.is-hidden,
[hidden] { 
  display: none !important; 
}

/* Fail-safe View State Management (Mutually Exclusive Views) */
.view {
  display: none !important;
}

.view.active {
  display: block !important;
}
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.m-auto { margin: auto; }
.max-w-500 { max-width: 580px; width: 100%; }