/* =====================================================
   LUSITROPY UNIVERSAL CSS
   =====================================================
   
   This file contains the complete design system for the Lusitropy website,
   based on the iOS app's styling, colors, and layout patterns.
   
   Features:
   - Inter font as primary (body text)
   - Quicksand font for titles and branding
   - Light/Dark mode support
   - Mobile-first responsive design
   - Custom color palette matching iOS app
   - Consistent spacing and typography
   - Interactive elements and animations
   
   ===================================================== */

/* =====================================================
   FONT IMPORTS - LOCAL FONTS
   ===================================================== */

@font-face {
  font-family: 'Inter';
  src: url('inter.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Quicksand';
  src: url('quicksand.ttf') format('truetype');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

/* =====================================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ===================================================== */

:root {
  /* =====================================================
     COLOR PALETTE - Based on iOS App Colors
     ===================================================== */
  
  /* Brand Colors */
  --color-teal: #008080;
  --color-dark-teal: #006666;
  --color-yellow: #ffe15a;
  --color-orange: #ffaf41;
  --color-dark-orange: #d2781e;
  --color-red: #dc5a50;
  --color-green: #6ed28c;
  --color-blue: #6496ff;
  --color-purple: #9370db;
  --color-dark-purple: #663399;
  --color-cream: #f0ebeb;
  --color-gray: #0f0f14;
  
  /* Light Mode Colors */
  --color-background: var(--color-cream);
  --color-foreground: var(--color-gray);
  --color-primary: var(--color-orange);
  --color-primary-dark: var(--color-dark-orange);
  --color-secondary: var(--color-teal);
  --color-accent: var(--color-yellow);
  --color-success: var(--color-green);
  --color-error: var(--color-red);
  --color-warning: var(--color-yellow);
  --color-info: var(--color-blue);
  
  /* Text Colors */
  --color-text-primary: var(--color-foreground);
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-text-inverse: var(--color-background);
  
  /* Border Colors */
  --color-border: #e0e0e0;
  --color-border-light: #f0f0f0;
  --color-border-dark: #cccccc;
  
  /* Shadow Colors */
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-shadow-light: rgba(0, 0, 0, 0.05);
  --color-shadow-dark: rgba(0, 0, 0, 0.2);
  
  /* =====================================================
     TYPOGRAPHY
     ===================================================== */
  
  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-brand: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Font Sizes (Based on iOS App) */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  --font-size-6xl: 3.75rem;   /* 60px */
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* =====================================================
     SPACING
     ===================================================== */
  
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  
  /* =====================================================
     BORDER RADIUS
     ===================================================== */
  
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;
  
  /* =====================================================
     SHADOWS
     ===================================================== */
  
  --shadow-sm: 0 1px 2px 0 var(--color-shadow);
  --shadow-md: 0 4px 6px -1px var(--color-shadow);
  --shadow-lg: 0 10px 15px -3px var(--color-shadow);
  --shadow-xl: 0 20px 25px -5px var(--color-shadow);
  
  /* =====================================================
     TRANSITIONS
     ===================================================== */
  
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.25s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* =====================================================
     Z-INDEX
     ===================================================== */
  
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* =====================================================
     BUTTON VARIANTS (Contrast)
     ===================================================== */
  /* Light mode default for contrast button: black bg, white text */
  --color-button-contrast-bg: #000000;
  --color-button-contrast-hover: #222222;
  --color-button-contrast-text: #ffffff;

  /* Unified control heights (single-line controls) */
  --control-height: 40px;
}

/* =====================================================
   DARK MODE VARIABLES
   ===================================================== */

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark Mode Colors */
    --color-background: var(--color-gray);
    --color-foreground: var(--color-cream);
    --color-primary: var(--color-orange);
    --color-primary-dark: var(--color-dark-orange);
    
    /* Text Colors */
    --color-text-primary: var(--color-foreground);
    --color-text-secondary: #cccccc;
    --color-text-muted: #999999;
    
    /* Border Colors */
    --color-border: #333333;
    --color-border-light: #444444;
    --color-border-dark: #222222;
    
    /* Shadow Colors */
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-light: rgba(0, 0, 0, 0.2);
    --color-shadow-dark: rgba(0, 0, 0, 0.4);

    /* Dark mode: contrast button becomes white bg, black text */
    --color-button-contrast-bg: #ffffff;
    --color-button-contrast-hover: #e6e6e6;
    --color-button-contrast-text: #000000;
  }

  .alert-warning {
    background-color: rgba(255, 225, 90, 0.08);
    border-color: var(--color-warning);
    color: var(--color-warning);
  }
}

/* =====================================================
   BASE STYLES
   ===================================================== */

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* =====================================================
   TYPOGRAPHY UTILITIES
   ===================================================== */

/* Font Family Classes */
.font-primary {
  font-family: var(--font-primary);
}

.font-brand {
  font-family: var(--font-brand);
}

/* Font Size Classes */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }
.text-6xl { font-size: var(--font-size-6xl); }

/* Font Weight Classes */
.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Line Height Classes */
.leading-tight { line-height: var(--line-height-tight); }
.leading-normal { line-height: var(--line-height-normal); }
.leading-relaxed { line-height: var(--line-height-relaxed); }

/* Text Color Classes */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-inverse { color: var(--color-text-inverse); }
.text-brand { color: var(--color-primary); }

/* =====================================================
   HEADINGS
   ===================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-brand);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin: 0 0 var(--spacing-md) 0;
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.025em;
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
}

h4 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
}

h5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
}

/* =====================================================
   LUSITROPY BRAND TITLE
   ===================================================== */

.lusitropy-title {
  font-family: var(--font-brand);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-align: center;
  margin: var(--spacing-lg) 0;
}

.lusitropy-title.large {
  font-size: var(--font-size-5xl);
}

.lusitropy-title.small {
  font-size: var(--font-size-2xl);
}

/* =====================================================
   LAYOUT UTILITIES
   ===================================================== */

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container.small {
  max-width: 800px;
}

.container.large {
  max-width: 1400px;
}

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

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

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

/* Alignment */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-1 { margin: var(--spacing-xs); }
.m-2 { margin: var(--spacing-sm); }
.m-3 { margin: var(--spacing-md); }
.m-4 { margin: var(--spacing-lg); }
.m-5 { margin: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }

  /* Gap utilities */
  .gap-0 { gap: 0; }
  .gap-1 { gap: var(--spacing-xs); }
  .gap-2 { gap: var(--spacing-sm); }
  .gap-3 { gap: var(--spacing-md); }
  .gap-4 { gap: var(--spacing-lg); }

/* =====================================================
   BUTTONS
   ===================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  height: var(--control-height); /* consistent height across buttons */
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  /* Limit transition to visual properties to avoid layout jitter */
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  will-change: box-shadow, background-color;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  /* Avoid positional movement on hover to prevent subtle shifts */
  transform: none;
}

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

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

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  height: 32px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-lg);
  height: 48px;
}

/* Button Variants */
.btn-secondary {
  /* Match base .btn sizing/shape; only change colors to contrast variant */
  background-color: var(--color-button-contrast-bg) !important;
  color: var(--color-button-contrast-text) !important;
  border: none !important;
}

.btn-secondary:hover {
  background-color: var(--color-button-contrast-hover) !important;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-primary);
  box-shadow: none;
  border: 1px solid transparent; /* preserve layout consistency among button groups */
}
.btn-white { /* explicit white/black contrast button for dark mode */
  background-color: var(--color-button-contrast-bg) !important;
  color: var(--color-button-contrast-text) !important;
  border: none !important;
}

.btn-white:hover {
  background-color: var(--color-button-contrast-hover) !important;
}

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

/* =====================================================
   CARDS
   ===================================================== */

.card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  /* Remove transitions entirely to eliminate any hover-induced bounce */
  transition: none;
}

/* Removed hover effects on cards to prevent visual bounce */
/* .card:hover { } */

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-family: var(--font-brand);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--spacing-sm) 0;
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.card-body {
  color: var(--color-text-primary);
}

.card-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

/* =====================================================
   FORMS
   ===================================================== */

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  height: var(--control-height); /* match button height */
  line-height: 1; /* tight line-height to center text */
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 175, 65, 0.1);
}

.form-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
  height: var(--control-height); /* align with single-line controls */
}

/* =====================================================
   ALERTS
   ===================================================== */

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  margin-bottom: var(--spacing-md);
}

.alert-success {
  background-color: rgba(110, 210, 140, 0.1);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert-error {
  background-color: rgba(220, 90, 80, 0.1);
  border-color: var(--color-error);
  color: var(--color-error);
}

.alert-warning {
  background-color: rgba(255, 225, 90, 0.1);
  border-color: var(--color-border);
  color: #000000;
}

.alert-info {
  background-color: rgba(100, 150, 255, 0.1);
  border-color: var(--color-info);
  color: var(--color-info);
}

/* =====================================================
   NAVIGATION
   ===================================================== */

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  background-color: var(--color-border-light);
  color: var(--color-primary);
}

.nav-link.active {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* =====================================================
   TAB SYSTEM
   ===================================================== */

.tab-container {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.tab-list {
  display: flex;
  gap: var(--spacing-sm);
  overflow-x: auto;
}

.tab-item {
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-item:hover {
  color: var(--color-text-primary);
}

.tab-item.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-content {
  padding: var(--spacing-lg) 0;
}

/* =====================================================
   PROGRESS INDICATORS
   ===================================================== */

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.progress-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  transition: all var(--transition-fast);
}

.progress-seal.completed {
  background-color: var(--color-accent);
  color: var(--color-text-primary);
}

/* =====================================================
   LOADING STATES
   ===================================================== */

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  border-top-color: var(--color-primary);
  animation: spin 1s ease-in-out infinite;
}

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

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal-backdrop);
}

/* =====================================================
   ANIMATIONS
   ===================================================== */

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

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.animate-fade-in {
  animation: fadeIn var(--transition-normal);
}

.animate-slide-up {
  animation: slideInUp var(--transition-normal);
}

.animate-heartbeat {
  animation: heartbeat 2s ease-in-out infinite;
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

/* Mobile First Approach */
@media (max-width: 640px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .lusitropy-title {
    font-size: var(--font-size-3xl);
  }
  
  .lusitropy-title.large {
    font-size: var(--font-size-4xl);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .tab-list {
    flex-wrap: wrap;
  }
}

/* Tablet */
@media (min-width: 641px) and (max-width: 1024px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop */
@media (min-width: 1025px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .lusitropy-title.large {
    font-size: var(--font-size-6xl);
  }
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */

/* Display */
.hidden { display: none; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Width & Height */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

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

/* Shadows */
.shadow { 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); }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-25 { opacity: 0.25; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-scroll { overflow: scroll; }

  /* Popover/dropdown helpers */
  .popover { position: absolute; z-index: var(--z-popover); width: 100%; max-width: 480px; background: var(--color-background); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
  .popover .list { max-height: 300px; overflow-y: auto; padding: var(--spacing-xs) 0; }
  .popover .list .btn { width: 100%; justify-content: flex-start; padding: var(--spacing-sm) var(--spacing-md); height: auto; min-height: 36px; border-radius: 0; }
  .popover .list .btn:hover { background: var(--color-border-light); }

/* =====================================================
   PRINT STYLES
   ===================================================== */

@media print {
  .no-print { display: none; }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    border: 1px solid #ccc;
    box-shadow: none;
  }
  
  .btn {
    border: 1px solid #ccc;
    background: white;
    color: black;
  }
}

/* =====================================================
   ACCESSIBILITY
   ===================================================== */

/* Focus styles for keyboard navigation */
.btn:focus,
.form-input:focus,
.nav-link:focus,
.tab-item:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Screen reader only text */
.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: #000000;
    --color-text-secondary: #000000;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .animate-fade-in,
  .animate-slide-up,
  .animate-heartbeat {
    animation: none;
  }
}