/* PillCheck Design System */
/* Healthcare App Color Palette: Calm cyan + health green */

:root {
  /* Colors - Healthcare Theme */
  --color-primary: #0891B2;
  --color-primary-light: #22D3EE;
  --color-primary-dark: #0E7490;
  --color-secondary: #059669;
  --color-secondary-light: #10B981;
  --color-accent: #059669;
  
  /* Semantic Colors */
  --color-critical: #DC2626;
  --color-critical-bg: #FEF2F2;
  --color-moderate: #F97316;
  --color-moderate-bg: #FFF7ED;
  --color-minor: #EAB308;
  --color-minor-bg: #FEFCE8;
  --color-safe: #22C55E;
  --color-safe-bg: #F0FDF4;
  
  /* Neutrals */
  --color-bg: #ECFEFF;
  --color-bg-card: #FFFFFF;
  --color-text: #164E63;
  --color-text-light: #0E7490;
  --color-text-muted: #67A5B2;
  --color-border: #A5F3FC;
  --color-border-dark: #22D3EE;
  
  /* Typography - Wellness pairing: Lora + Raleway */
  --font-heading: 'Lora', Georgia, serif;
  --font-body: 'Raleway', system-ui, sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  
  /* Spacing Scale */
  --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;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p {
  margin-bottom: var(--space-4);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Header */
.header {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-xl);
}

.nav-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-light);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-primary);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--space-16) 0;
}

.hero h1 {
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.hero h1 span {
  color: var(--color-primary);
}

.hero p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-8);
}

/* Main Card */
.main-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
}

/* Search Section */
.search-section {
  margin-bottom: var(--space-8);
}

.search-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.search-container {
  position: relative;
}

.search-input {
  width: 100%;
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-12);
  font-size: var(--text-lg);
  font-family: var(--font-body);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: var(--text-xl);
}

/* Suggestions Dropdown */
.suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  margin-top: var(--space-1);
  max-height: 300px;
  overflow-y: auto;
  z-index: 50;
  display: none;
}

.suggestions.active {
  display: block;
}

.suggestion-item {
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}

.suggestion-item:hover {
  background: var(--color-bg);
}

.suggestion-name {
  font-weight: 500;
}

.suggestion-type {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Medication List */
.med-list-section {
  margin-bottom: var(--space-8);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 600;
}

.med-count {
  background: var(--color-primary);
  color: white;
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.med-list {
  display: grid;
  gap: var(--space-3);
}

.med-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.med-item:hover {
  border-color: var(--color-border-dark);
}

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

.med-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--text-lg);
}

.med-details h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.med-details p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.remove-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.remove-btn:hover {
  background: var(--color-critical-bg);
  color: var(--color-critical);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

/* Check Button */
.check-btn {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
  font-weight: 600;
  font-family: var(--font-body);
  color: white;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

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

.check-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Results Section */
.results-section {
  display: none;
}

.results-section.active {
  display: block;
  animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Interaction Cards */
.interactions-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.interaction-card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
}

.interaction-card.critical {
  background: var(--color-critical-bg);
  border-color: var(--color-critical);
}

.interaction-card.moderate {
  background: var(--color-moderate-bg);
  border-color: var(--color-moderate);
}

.interaction-card.minor {
  background: var(--color-minor-bg);
  border-color: var(--color-minor);
}

.interaction-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.severity-badge {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.severity-badge.critical {
  background: var(--color-critical);
  color: white;
}

.severity-badge.moderate {
  background: var(--color-moderate);
  color: white;
}

.severity-badge.minor {
  background: var(--color-minor);
  color: white;
}

.interaction-drugs {
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text);
}

.interaction-description {
  font-size: var(--text-base);
  line-height: 1.6;
  margin: 0;
}

/* Safe State */
.safe-result {
  text-align: center;
  padding: var(--space-8);
  background: var(--color-safe-bg);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-safe);
}

.safe-icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
}

.safe-result h3 {
  color: var(--color-safe);
  margin-bottom: var(--space-2);
}

.safe-result p {
  color: var(--color-text-muted);
  margin: 0;
}

/* Loading State */
.loading-state {
  text-align: center;
  padding: var(--space-8);
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-4);
}

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

/* Footer */
.footer {
  text-align: center;
  padding: var(--space-8) 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.disclaimer {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero {
    padding: var(--space-8) 0;
  }
  
  .hero h1 {
    font-size: var(--text-2xl);
  }
  
  .main-card {
    padding: var(--space-5);
  }
  
  .med-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .remove-btn {
    align-self: flex-end;
  }
}

/* Focus States for Accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #0891B2;
    --color-text-muted: #164E63;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}