/**
 * Comparison Base Styles
 * Layout, containers, page structure, typography, loading and empty states
 */

/* ============================================================================
   PAGE LAYOUT & CONTAINER
   ============================================================================ */

.comparison-page {
    min-height: calc(100vh - 64px);
    background-color: var(--bg-primary);
    padding: clamp(1.5rem, 3vw, 2.5rem) 0;
}

.comparison-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 2.5vw, 2rem);
}

/* ============================================================================
   PAGE HEADER
   ============================================================================ */

.comparison-header {
    text-align: left;
    margin-bottom: clamp(1.5rem, 3vw, 2rem);
}

.page-title {
    font-size: clamp(1.5rem, 4vw + 0.5rem, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.2;
}

.page-subtitle {
    font-size: clamp(0.9375rem, 1.5vw + 0.25rem, 1rem);
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* ============================================================================
   LOADING STATE
   ============================================================================ */

.comparison-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    gap: 1rem;
    color: var(--text-secondary);
}

.comparison-loading__spinner {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.comparison-loading__spinner .spinner {
    width: 40px;
    height: 40px;
    stroke: var(--text-muted);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.comparison-loading p {
    font-size: clamp(0.9375rem, 1.5vw + 0.25rem, 1rem);
    margin: 0;
}

/* ============================================================================
   EMPTY STATE
   ============================================================================ */

.comparison-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: clamp(2rem, 4vw, 3rem) clamp(1.5rem, 2.5vw, 2rem);
    text-align: center;
    margin-bottom: clamp(1.5rem, 3vw, 2rem);
}

.comparison-empty__icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-tertiary);
    border-radius: 50%;
    color: var(--text-muted);
    margin-bottom: clamp(1.5rem, 2vw, 1.5rem);
}

.comparison-empty__icon svg {
    width: 48px;
    height: 48px;
}

.comparison-empty h2 {
    font-size: clamp(1.25rem, 2vw + 0.5rem, 1.5rem);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 clamp(0.5rem, 1vw, 0.75rem) 0;
}

.comparison-empty p {
    font-size: clamp(0.9375rem, 1.5vw + 0.25rem, 1rem);
    color: var(--text-secondary);
    margin: 0 0 clamp(1.5rem, 2vw, 1.5rem) 0;
    max-width: 400px;
}

.comparison-empty__btn {
    display: inline-block;
    padding: clamp(0.75rem, 1.5vw, 1rem) clamp(1.5rem, 2.5vw, 1.75rem);
    background-color: var(--accent);
    color: #000;
    border: none;
    border-radius: var(--radius-md);
    font-size: clamp(0.9375rem, 1.5vw + 0.25rem, 1rem);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.comparison-empty__btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

/* ============================================================================
   WARNING STATE - Need at least 2 products
   ============================================================================ */

.comparison-warning {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: clamp(1rem, 2vw, 1.5rem);
    background-color: rgba(var(--warning-rgb), 0.08);
    border: 1px solid rgba(var(--warning-rgb), 0.2);
    border-radius: var(--radius-md);
    margin-bottom: clamp(1.5rem, 3vw, 2rem);
}

.comparison-warning__icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--warning);
    flex-shrink: 0;
}

.comparison-warning__icon svg {
    width: 20px;
    height: 20px;
}

.comparison-warning p {
    font-size: clamp(0.9375rem, 1.5vw + 0.25rem, 1rem);
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================================================
   PRODUCTS HEADER - Sticky product cards at top
   ============================================================================ */

.comparison-results {
    display: flex;
    flex-direction: column;
    gap: clamp(1.5rem, 3vw, 2rem);
}

.comparison-products-header {
    display: grid;
    grid-template-columns: minmax(140px, 0.4fr) repeat(auto-fit, minmax(200px, 1fr));
    gap: clamp(0.75rem, 1.5vw, 1rem);
    position: sticky;
    top: calc(clamp(52px, 8vw + 52px, 64px) + 1.25rem);
    z-index: 50;
    padding: clamp(0.75rem, 1.5vw, 1rem);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: padding 0.3s ease-out;
}

/* Compact mode when scrolled - just hide extra elements, keep same size */
.comparison-products-header.is-compact .comparison-product-card__brand,
.comparison-products-header.is-compact .comparison-product-card__price-block,
.comparison-products-header.is-compact .comparison-product-card__stock {
    display: none;
}

/* Add card in compact mode - hide it */
.comparison-products-header.is-compact .comparison-product-card--add {
    display: none;
}

.comparison-products-header__label {
    font-size: clamp(0.875rem, 1.5vw + 0.25rem, 0.9375rem);
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-top: 1rem;
}

/* ============================================================================
   SSR INTRO SECTION - Fallback for no-JS users
   ============================================================================ */

.comparison-intro {
    margin-bottom: clamp(2rem, 4vw, 3rem);
}

.comparison-intro h1 {
    font-size: clamp(1.5rem, 4vw + 0.5rem, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.75rem 0;
    line-height: 1.2;
}

.comparison-intro > p {
    font-size: clamp(0.9375rem, 1.5vw + 0.25rem, 1.0625rem);
    color: var(--text-secondary);
    margin: 0 0 clamp(1.5rem, 3vw, 2rem) 0;
    line-height: 1.6;
}

.comparison-intro h2 {
    font-size: clamp(1.125rem, 2vw + 0.25rem, 1.25rem);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

/* Featured Comparisons Grid */
.comparison-featured {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
    margin-bottom: clamp(2rem, 4vw, 2.5rem);
}

.comparison-featured__card {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: clamp(1rem, 2vw, 1.25rem);
    text-decoration: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.comparison-featured__card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.comparison-featured__images {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(0.75rem, 1.5vw, 1rem);
    margin-bottom: 1rem;
}

.comparison-featured__images img {
    width: clamp(60px, 10vw, 80px);
    height: clamp(60px, 10vw, 80px);
    object-fit: contain;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 0.5rem;
}

.comparison-featured__vs {
    font-size: clamp(0.75rem, 1vw + 0.25rem, 0.875rem);
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.comparison-featured__info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    text-align: center;
}

.comparison-featured__category {
    font-size: clamp(0.6875rem, 1vw + 0.25rem, 0.75rem);
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.comparison-featured__title {
    font-size: clamp(0.875rem, 1.5vw + 0.25rem, 0.9375rem);
    color: var(--text-primary);
    line-height: 1.4;
}

.comparison-featured__title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.comparison-featured__title a:hover {
    color: var(--accent);
}

/* Category Navigation */
.comparison-categories {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(0.5rem, 1vw, 0.75rem);
    margin-bottom: clamp(2rem, 4vw, 2.5rem);
}

.comparison-categories__link {
    display: inline-block;
    padding: clamp(0.5rem, 1vw, 0.625rem) clamp(1rem, 2vw, 1.25rem);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: clamp(0.875rem, 1.5vw + 0.25rem, 0.9375rem);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.comparison-categories__link:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #000;
}

/* Notice */
.comparison-notice {
    padding: clamp(1rem, 2vw, 1.25rem);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: clamp(0.875rem, 1.5vw + 0.25rem, 0.9375rem);
    color: var(--text-secondary);
    line-height: 1.6;
}

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