/* ========== Utility Classes ========== */
/* These classes eliminate CSS duplication across the codebase */

/* Card Styles */
.card {
    background: var(--light-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card-hover:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

/* Spacing Utilities */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }
.p-5 { padding: 3rem; }

/* Flexbox Utilities */
.flex { display: flex; }
.flex-column { flex-direction: column; }
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}
.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* Grid Utilities */
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-gap-1 { gap: 0.5rem; }
.grid-gap-2 { gap: 1rem; }
.grid-gap-3 { gap: 1.5rem; }
.grid-gap-4 { gap: 2rem; }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-color); }
.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Font Utilities */
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.font-normal { font-weight: 400; }
.font-light { font-weight: 300; }

/* Border Utilities */
.border { border: 1px solid var(--border-color); }
.border-top { border-top: 1px solid var(--border-color); }
.border-bottom { border-bottom: 1px solid var(--border-color); }
.border-none { border: none; }
.rounded { border-radius: 8px; }
.rounded-lg { border-radius: 12px; }
.rounded-xl { border-radius: 16px; }
.rounded-full { border-radius: 9999px; }

/* Shadow Utilities */
.shadow-sm { box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); }
.shadow-md { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2); }
.shadow-lg { box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3); }
.shadow-none { box-shadow: none; }

/* Background Utilities */
.bg-light { background: var(--light-bg); }
.bg-dark { background: var(--dark-bg); }
.bg-primary { background: var(--primary-color); }
.bg-secondary { background: var(--secondary-color); }
.bg-transparent { background: transparent; }

/* Width/Height Utilities */
.w-full { width: 100%; }
.h-full { height: 100%; }
.w-auto { width: auto; }
.h-auto { height: auto; }

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

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

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

/* Transition Utilities */
.transition { transition: var(--transition); }
.transition-all { transition: all 0.3s ease; }
.transition-fast { transition: all 0.15s ease; }
.transition-slow { transition: all 0.6s ease; }

/* Icon Utilities */
.icon-sm { font-size: 1rem; }
.icon-md { font-size: 1.5rem; }
.icon-lg { font-size: 2rem; }
.icon-xl { font-size: 3rem; }

/* Button Utilities */
.btn-block {
    display: block;
    width: 100%;
}
.btn-disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Animation Utilities */
@media (prefers-reduced-motion: no-preference) {
    .animate-fade-in {
        animation: fadeIn 0.6s ease;
    }

    .animate-slide-up {
        animation: slideUp 0.6s ease;
    }

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

    @keyframes slideUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* Accessibility Utilities */
.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;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* Responsive Utilities */
@media (max-width: 768px) {
    .mobile-hidden { display: none; }
    .mobile-block { display: block; }
    .mobile-flex { display: flex; }
    .mobile-grid { display: grid; }
    .mobile-text-center { text-align: center; }
    .mobile-w-full { width: 100%; }
}

@media (min-width: 769px) {
    .desktop-hidden { display: none; }
    .desktop-block { display: block; }
    .desktop-flex { display: flex; }
    .desktop-grid { display: grid; }
}

/* Container Utilities */
.container-sm {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-md {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-lg {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-xl {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}