/**
 * REUSABLE COMPONENTS
 * Modern UI components optimized for performance
 */

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    line-height: 1;
    border-radius: var(--border-radius);
    border: var(--border-width) solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

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

.btn-secondary {
    background: var(--color-secondary);
    color: var(--text-inverse);
}

.btn-secondary:hover {
    background: var(--color-secondary-dark);
    color: var(--text-inverse);
}

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

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

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

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

.card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.card-content {
    padding: var(--space-6);
}

.card-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    line-height: var(--line-height-relaxed);
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-4);
}

.card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ==================== GRID LAYOUTS ==================== */

.grid {
    display: grid;
    gap: var(--space-8);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ==================== BADGES ==================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: var(--color-primary);
    color: var(--text-inverse);
}

.badge-secondary {
    background: var(--color-secondary);
    color: var(--text-inverse);
}

.badge-success {
    background: var(--color-success);
    color: var(--text-inverse);
}

.badge-outline {
    background: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
}

/* ==================== HERO SECTIONS ==================== */

.hero {
    position: relative;
    padding: var(--space-24) 0;
    background: var(--color-gray-900);
    color: var(--text-inverse);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    color: var(--text-inverse);
    margin-bottom: var(--space-6);
    line-height: var(--line-height-tight);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-gray-300);
    margin-bottom: var(--space-8);
    line-height: var(--line-height-relaxed);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.hero-image {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

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

.form-group {
    margin-bottom: var(--space-6);
}

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

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    font-family: var(--font-primary);
    color: var(--text-primary);
    background: var(--bg-card);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--space-2);
}

/* ==================== BREADCRUMBS ==================== */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-6);
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

.breadcrumb li:not(:last-child)::after {
    content: '/';
    color: var(--text-muted);
}

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

.skeleton {
    background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.loading-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

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

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

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

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

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

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

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.hidden {
    display: none;
}

/* ==================== RESPONSIVE IMAGES ==================== */

img[loading="lazy"] {
    opacity: 0;
    transition: opacity var(--transition-base);
}

img[loading="lazy"].loaded {
    opacity: 1;
}

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

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

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

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}