/* ========================================
   Page Header
   ======================================== */
.page-header {
    background: var(--color-sage-lighter);
    padding: var(--spacing-2xl) 0;
}

.page-header__inner {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 var(--spacing-2xl);
}

.page-header__title {
    font-family: var(--font-serif);
    font-size: var(--font-size-h1);
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

.page-header__desc {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    max-width: 600px;
}

/* ========================================
   Filter Bar
   ======================================== */
.filter-bar {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: var(--header-height);
    z-index: 50;
}

.filter-bar__inner {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    height: 56px;
}

/* 카테고리 탭 */
.category-tabs {
    display: flex;
    gap: var(--spacing-xs);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.category-tab {
    padding: 8px 16px;
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--color-gray);
    background: transparent;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.category-tab:hover {
    background: var(--color-sage-lighter);
    color: var(--color-charcoal);
}

.category-tab.active {
    background: var(--color-sage);
    color: var(--color-white);
}

/* 정렬 드롭다운 */
.sort-dropdown {
    position: relative;
}

.sort-dropdown__trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 12px;
    font-size: var(--font-size-small);
    color: var(--color-gray);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.sort-dropdown__trigger:hover {
    border-color: var(--color-sage);
    color: var(--color-charcoal);
}

.sort-dropdown__trigger svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s;
}

.sort-dropdown.open .sort-dropdown__trigger svg {
    transform: rotate(180deg);
}

.sort-dropdown__menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    min-width: 140px;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s;
    z-index: 10;
}

.sort-dropdown.open .sort-dropdown__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sort-dropdown__item {
    display: block;
    width: 100%;
    padding: 10px 16px;
    font-size: var(--font-size-small);
    color: var(--color-gray);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: all 0.15s;
}

.sort-dropdown__item:hover {
    background: var(--color-sage-lighter);
    color: var(--color-charcoal);
}

.sort-dropdown__item.active {
    color: var(--color-sage);
    font-weight: 600;
}

/* ========================================
   Main Layout (2단)
   ======================================== */
.main-layout {
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: var(--spacing-2xl);
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--spacing-2xl);
}

/* ========================================
   Insight List
   ======================================== */
.insight-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Featured (첫 번째 글) */
.insight-card--featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: var(--spacing-lg);
}

.insight-card--featured .insight-card__thumb {
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, var(--color-sage) 0%, var(--color-sage-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.3);
    font-size: var(--font-size-small);
    overflow: hidden;
}

.insight-card--featured .insight-card__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.insight-card--featured .insight-card__body {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.insight-card--featured .insight-card__category {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-sage);
    margin-bottom: var(--spacing-sm);
}

.insight-card--featured .insight-card__title {
    font-family: var(--font-serif);
    font-size: var(--font-size-h2);
    font-weight: 700;
    color: var(--color-charcoal);
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-md);
    transition: color 0.2s;
}

.insight-card--featured:hover .insight-card__title {
    color: var(--color-sage);
}

.insight-card--featured .insight-card__desc {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.insight-card--featured .insight-card__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.insight-card__author-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-sage-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-small);
    font-weight: 600;
    color: var(--color-sage);
}

.insight-card__author-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.insight-card__author-name {
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--color-charcoal);
}

.insight-card__date {
    font-size: var(--font-size-xs);
    color: var(--color-muted);
}

.insight-card__reading-time {
    font-size: var(--font-size-xs);
    color: var(--color-muted);
    margin-left: auto;
}

/* 일반 카드 (가로형) */
.insight-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-light);
}

.insight-card:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.insight-card__thumb {
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, var(--color-sage-light) 0%, var(--color-sage) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: var(--font-size-xs);
    overflow: hidden;
    transition: opacity 0.2s;
}

.insight-card:hover .insight-card__thumb {
    opacity: 0.9;
}

.insight-card__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.insight-card__body {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.insight-card__category {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-sage);
    margin-bottom: var(--spacing-xs);
}

.insight-card__title {
    font-family: var(--font-serif);
    font-size: var(--font-size-h3);
    font-weight: 600;
    color: var(--color-charcoal);
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-sm);
    transition: color 0.2s;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.insight-card:hover .insight-card__title {
    color: var(--color-sage);
}

.insight-card__desc {
    font-size: var(--font-size-small);
    color: var(--color-gray);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.insight-card__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-muted);
}

.insight-card__meta-divider {
    width: 3px;
    height: 3px;
    background: var(--color-muted);
    border-radius: 50%;
}

/* 프리미엄 뱃지 */
.insight-card__badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    background: var(--color-amber-light);
    color: var(--color-amber-dark);
    font-size: 11px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-left: var(--spacing-sm);
}

.insight-card__badge svg {
    width: 12px;
    height: 12px;
}

/* ========================================
   Sidebar
   ======================================== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.sidebar__section {
    background: var(--color-sage-lighter);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.sidebar__title {
    font-size: var(--font-size-small);
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

/* 인기 글 */
.popular-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.popular-item {
    display: flex;
    gap: var(--spacing-md);
    transition: opacity 0.2s;
}

.popular-item:hover {
    opacity: 0.8;
}

.popular-item__rank {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: var(--color-sage);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.popular-item__rank--top {
    background: var(--color-amber);
}

.popular-item__content {
    flex: 1;
    min-width: 0;
}

.popular-item__title {
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--color-charcoal);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 4px;
}

.popular-item__author {
    font-size: var(--font-size-xs);
    color: var(--color-muted);
}

/* 태그 클라우드 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag-cloud__item {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
    color: var(--color-gray);
    background: var(--color-white);
    border-radius: 16px;
    transition: all 0.2s;
}

.tag-cloud__item:hover {
    background: var(--color-sage);
    color: var(--color-white);
}

/* 뉴스레터 CTA */
.newsletter-cta {
    background: var(--color-white);
    border: 1px solid var(--color-sage);
}

.newsletter-cta__icon {
    width: 48px;
    height: 48px;
    background: var(--color-sage-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.newsletter-cta__icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-sage);
}

.newsletter-cta__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-xs);
}

.newsletter-cta__desc {
    font-size: var(--font-size-small);
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.newsletter-cta__form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.newsletter-cta__input {
    padding: 10px 14px;
    font-size: var(--font-size-small);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s;
}

.newsletter-cta__input:focus {
    border-color: var(--color-sage);
}

.newsletter-cta__btn {
    padding: 10px 16px;
    font-size: var(--font-size-small);
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-sage);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s;
}

.newsletter-cta__btn:hover {
    background: var(--color-sage-dark);
}

/* ========================================
   Pagination
   ======================================== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border-light);
}

.pagination__btn {
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    font-size: var(--font-size-small);
    color: var(--color-gray);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination__btn:hover:not(:disabled) {
    border-color: var(--color-sage);
    color: var(--color-sage);
}

.pagination__btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination__btn.active {
    background: var(--color-sage);
    border-color: var(--color-sage);
    color: var(--color-white);
}

.pagination__btn svg {
    width: 16px;
    height: 16px;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .insight-card--featured {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: var(--spacing-xl) 0;
    }

    .page-header__inner,
    .filter-bar__inner,
    .main-layout {
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }

    .filter-bar__inner {
        flex-direction: column;
        align-items: stretch;
        height: auto;
        padding-top: var(--spacing-md);
        padding-bottom: var(--spacing-md);
        gap: var(--spacing-md);
    }

    .category-tabs {
        order: 1;
    }

    .sort-dropdown {
        order: 2;
        align-self: flex-end;
    }

    .insight-card {
        grid-template-columns: 120px 1fr;
        gap: var(--spacing-md);
    }

    .insight-card__desc {
        display: none;
    }

    .sidebar {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .insight-card {
        grid-template-columns: 100px 1fr;
    }

    .insight-card__title {
        font-size: var(--font-size-base);
    }
}