/**
 * UTILITY CLASSES
 * Singularity Council - Design System Utilities
 * Replaces inline styles with reusable classes
 */

/* ============================================
   SPACING UTILITIES
   ============================================ */

/* Margin Utilities */
.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mt-3xl { margin-top: var(--spacing-3xl); }

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

/* Padding Utilities */
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.p-2xl { padding: var(--spacing-2xl); }

.px-xs { padding-left: var(--spacing-xs); padding-right: var(--spacing-xs); }
.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }
.px-xl { padding-left: var(--spacing-xl); padding-right: var(--spacing-xl); }

.py-xs { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-xl { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }

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

.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-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.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); }

.opacity-80 { opacity: 0.8; }
.opacity-90 { opacity: 0.9; }
.opacity-95 { opacity: 0.95; }

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

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.flex { display: flex; }
.grid { display: grid; }
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

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

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* ============================================
   BORDER & RADIUS UTILITIES
   ============================================ */

.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-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* ============================================
   SHADOW UTILITIES
   ============================================ */

.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); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

/* ============================================
   Z-INDEX UTILITIES
   ============================================ */

.z-0 { z-index: 0; }
.z-1 { z-index: 1; }
.z-2 { z-index: 2; }
.z-10 { z-index: 10; }
.z-100 { z-index: 100; }
.z-1000 { z-index: var(--z-dropdown); }

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

/* Skip Navigation Link */
.skip-nav {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
    font-weight: var(--font-weight-semibold);
    transition: top var(--transition-fast);
}

.skip-nav:focus {
    top: 0;
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* Focus Indicators - Enhanced for all interactive elements */
*:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Focus for buttons */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* Focus for cards */
.card-3d-tilt:focus-visible,
.glass-card:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.sr-only-focusable:focus {
    position: static;
    width: auto;
    height: auto;
    padding: inherit;
    margin: inherit;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* ============================================
   COMPONENT UTILITIES
   ============================================ */

/* Card Padding Variants */
.card-padding-sm { padding: var(--spacing-sm); }
.card-padding-md { padding: var(--spacing-md); }
.card-padding-lg { padding: var(--spacing-lg); }
.card-padding-xl { padding: var(--spacing-xl); }
.card-padding-2xl { padding: var(--spacing-2xl); }

/* Grid Layouts */
.grid-auto-fit-300 { 
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.grid-auto-fit-450 { 
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-xl);
}

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 768px) {
    .mobile-hidden { display: none !important; }
    .mobile-block { display: block !important; }
    .mobile-flex { display: flex !important; }
    .mobile-grid { display: grid !important; }
    
    .mobile-text-center { text-align: center !important; }
    .mobile-text-sm { font-size: var(--font-size-sm) !important; }
    
    .mobile-p-sm { padding: var(--spacing-sm) !important; }
    .mobile-p-md { padding: var(--spacing-md) !important; }
    
    .mobile-mt-sm { margin-top: var(--spacing-sm) !important; }
    .mobile-mb-sm { margin-bottom: var(--spacing-sm) !important; }
}

/* ============================================
   RTL UTILITIES
   ============================================ */

[dir="rtl"] .text-left { text-align: right; }
[dir="rtl"] .text-right { text-align: left; }