/* HearScribe Design System v3.0 - 2024-2025 Healthcare SaaS Best Practices */

/* ============================================================================
   DESIGN TOKENS - Healthcare Trust Foundation
   ============================================================================ */

:root {
  /* Primary: Professional Medical Blue - Inspires trust and healthcare professionalism */
  --color-primary: hsl(210, 100%, 50%);
  --color-primary-hover: hsl(210, 100%, 45%);
  --color-primary-light: hsl(210, 100%, 96%);
  --color-primary-dark: hsl(210, 100%, 40%);
  
  /* Hearing Health Status Colors - Industry-specific semantic colors */
  --hearing-excellent: hsl(142, 71%, 45%);
  --hearing-moderate: hsl(38, 92%, 50%);
  --hearing-attention: hsl(0, 72%, 51%);
  
  /* Neutral Grays (Medical Clean) - Optimized for healthcare readability */
  --gray-50: hsl(210, 20%, 98%);
  --gray-100: hsl(210, 20%, 96%);
  --gray-200: hsl(210, 20%, 90%);
  --gray-300: hsl(210, 20%, 82%);
  --gray-400: hsl(210, 20%, 65%);
  --gray-500: hsl(210, 20%, 50%);
  --gray-600: hsl(210, 20%, 40%);
  --gray-700: hsl(210, 20%, 30%);
  --gray-800: hsl(210, 20%, 20%);
  --gray-900: hsl(210, 20%, 13%);
  
  /* Semantic Colors - Healthcare context */
  --color-bg: var(--gray-50);
  --color-surface: white;
  --color-text: var(--gray-900);
  --color-text-muted: var(--gray-600);
  --color-text-light: var(--gray-500);
  --color-border: var(--gray-200);
  --color-border-strong: var(--gray-300);
  
  /* Status Colors */
  --color-success: var(--hearing-excellent);
  --color-warning: var(--hearing-moderate);
  --color-error: var(--hearing-attention);
  --color-info: var(--color-primary);
  
  /* Spacing System - 8-Point Grid for consistent rhythm */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 0.75rem;  /* 12px */
  --space-md: 1rem;     /* 16px */
  --space-lg: 1.5rem;   /* 24px */
  --space-xl: 2rem;     /* 32px */
  --space-2xl: 3rem;    /* 48px */
  --space-3xl: 4rem;    /* 64px */
  --space-4xl: 6rem;    /* 96px */
  
  /* Border Radius - Consistent rounded corners */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Shadows - Depth system for healthcare UI */
  --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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Glass Morphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-blur: blur(10px);
  
  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1100;
  --z-modal: 1200;
  --z-tooltip: 1300;
  
  /* Animation Variables */
  --scroll-offset: 50px;
}

/* ============================================================================
   TYPOGRAPHY SYSTEM - Medical-Grade Readability
   ============================================================================ */

/* Import Inter font - Optimized for healthcare interfaces */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Base Typography Reset */
* {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  font-optical-sizing: auto;
}

/* Fluid Typography Scale - Responsive across all devices */
h1, .text-h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h2, .text-h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

h3, .text-h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h4, .text-h4 {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

/* Body Text - Optimized for readability */
body, .text-base {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  font-weight: 400;
}

.text-lg {
  font-size: 1.125rem;
  line-height: 1.6;
}

.text-sm {
  font-size: 0.875rem;
  line-height: 1.5;
}

.text-xs {
  font-size: 0.75rem;
  line-height: 1.4;
}

/* Text Colors */
.text-muted { color: var(--color-text-muted); }
.text-light { color: var(--color-text-light); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

/* Font Weights */
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Special Typography */
.text-tabular { font-variant-numeric: tabular-nums; }
.text-uppercase { 
  text-transform: uppercase; 
  letter-spacing: 0.05em; 
  font-size: 0.875rem;
  font-weight: 600;
}

/* ============================================================================
   LAYOUT SYSTEM - Container & Grid Foundation
   ============================================================================ */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }
.container-xl { max-width: 1280px; }
.container-2xl { max-width: 1536px; }

/* Responsive Padding */
@media (max-width: 640px) {
  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.grid-auto { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ============================================================================
   COMPONENT SYSTEM - Modern Healthcare UI Components
   ============================================================================ */

/* Glass Morphism Cards */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-solid {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.card-featured {
  border: 2px solid var(--color-primary);
  background: var(--color-primary-light);
}

/* Button System - Three Variants */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  line-height: 1;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 44px; /* Accessibility: Touch target size */
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* Primary Button */
.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Secondary Button */
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

/* Button Sizes */
.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
  min-height: 36px;
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  min-height: 52px;
}

/* Form Controls - Healthcare Optimized */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.875rem;
}

.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  line-height: 1.5;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  min-height: 44px;
}

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

.form-input.error {
  border-color: var(--color-error);
}

.form-input.success {
  border-color: var(--color-success);
}

/* ============================================================================
   NAVIGATION SYSTEM - Glass Morphism Sticky Header
   ============================================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
  height: 70px;
}

.navbar.scrolled {
  height: 60px;
  box-shadow: var(--shadow-lg);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .navbar {
    height: auto;
    padding: var(--space-sm) 0;
  }
  
  .navbar-content {
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-md);
  }
  
  .navbar-nav {
    order: 3;
    width: 100%;
    justify-content: center;
  }
}

/* ============================================================================
   UTILITY CLASSES - Spacing, Colors, States
   ============================================================================ */

/* Spacing Utilities */
.m-0 { margin: 0; }
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }

/* Background Colors */
.bg-primary { background-color: var(--color-primary); }
.bg-surface { background-color: var(--color-surface); }
.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }

/* Border Radius */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ============================================================================
   ANIMATIONS & MICRO-INTERACTIONS
   ============================================================================ */

/* Smooth scroll for enhanced UX */
html {
  scroll-behavior: smooth;
}

/* Scroll-triggered animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(var(--scroll-offset));
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animation delays for multiple elements */
.animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.animate-on-scroll:nth-child(2) { transition-delay: 100ms; }
.animate-on-scroll:nth-child(3) { transition-delay: 200ms; }
.animate-on-scroll:nth-child(4) { transition-delay: 300ms; }
.animate-on-scroll:nth-child(5) { transition-delay: 400ms; }
.animate-on-scroll:nth-child(6) { transition-delay: 500ms; }

/* Slide in from left */
.animate-slide-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-slide-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide in from right */
.animate-slide-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-slide-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale up animation */
.animate-scale {
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Fade in animation for content */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeInUp 0.6s ease-out;
}

/* Floating animation for hero elements */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* Gentle pulse for attention-drawing elements */
@keyframes gentlePulse {
  0%, 100% { 
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4);
  }
  50% { 
    transform: scale(1.02);
    box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
  }
}

.animate-gentle-pulse {
  animation: gentlePulse 3s ease-in-out infinite;
}

/* Pulse animation for loading states */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Shimmer loading effect */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.animate-shimmer {
  background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* Bounce animation for interactive elements */
@keyframes bounce {
  0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
  40%, 43% { transform: translate3d(0,-10px,0); }
  70% { transform: translate3d(0,-5px,0); }
  90% { transform: translate3d(0,-2px,0); }
}

.animate-bounce {
  animation: bounce 1s ease-in-out;
}

/* Hover micro-interactions */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.hover-scale {
  transition: transform var(--transition-base);
}

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

/* Button press animation */
.btn-press {
  transition: transform var(--transition-fast);
}

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

/* ============================================================================
   ACCESSIBILITY & REDUCED MOTION
   ============================================================================ */

/* Respect user motion preferences */
@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;
  }
}

/* Focus visible for better keyboard navigation */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* 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: 0;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: var(--gray-600);
    --color-text-muted: var(--gray-700);
  }
}

/* ============================================================================
   RESPONSIVE BREAKPOINTS
   ============================================================================ */

/* Mobile landscape and up */
@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:flex-row { flex-direction: row; }
}

/* Tablet and up */
@media (min-width: 768px) {
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:block { display: block; }
  .md\:hidden { display: none; }
}

/* Desktop and up */
@media (min-width: 1024px) {
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:text-left { text-align: left; }
}

/* Large screens */
@media (min-width: 1280px) {
  .xl\:text-6xl { font-size: 3.75rem; }
}