/**
 * Nebula Theme - Components CSS
 * Design System Components using CSS Variables
 * Version: 2.0.0
 * Uses Nebula color palette: Sky Blue #0EA5E9, Dark Slate #0F172A, Amber #F59E0B
 */

/* ============================
   Announcement Bar
   ============================ */

.ds-announcement {
    padding: 10px 0;
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    border-bottom: 1px solid transparent;
}

.ds-announcement--info {
    background: var(--nebula-primary-light, #E0F2FE);
    color: var(--nebula-primary-dark, #0284C7);
    border-color: var(--nebula-primary, #0EA5E9);
}

.ds-announcement--warning {
    background: var(--nebula-warning-light, #FEF3C7);
    color: var(--nebula-warning-dark, #D97706);
    border-color: var(--nebula-warning, #F59E0B);
}

.ds-announcement--error {
    background: var(--nebula-error-light, #FEE2E2);
    color: var(--nebula-error-dark, #DC2626);
    border-color: var(--nebula-error, #EF4444);
}

.ds-announcement--success {
    background: var(--nebula-success-light, #D1FAE5);
    color: var(--nebula-success-dark, #059669);
    border-color: var(--nebula-success, #10B981);
}

/* ============================
   Featured Area (Hero + Carousel)
   ============================ */

.ds-featured-area {
    margin-bottom: 32px;
}

.ds-featured-area__inner {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
    align-items: stretch;
}

/* Carousel */
.ds-featured-carousel {
    position: relative;
    border-radius: var(--nebula-radius-xl, 16px);
    overflow: hidden;
    background: var(--nebula-bg-secondary, #F8FAFC);
    box-shadow: var(--nebula-shadow-lg, 0 10px 15px rgba(0, 0, 0, 0.1));
}

.ds-featured-carousel__track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.ds-featured-carousel__slide {
    flex: 0 0 100%;
    display: block;
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.ds-featured-carousel__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--nebula-duration-slow, 0.3s) var(--nebula-ease-out);
}

.ds-featured-carousel__slide:hover .ds-featured-carousel__img {
    transform: scale(1.03);
}

/* Carousel Dots */
.ds-featured-carousel__dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.ds-featured-carousel__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--nebula-duration-fast, 0.15s) var(--nebula-ease-out);
}

.ds-featured-carousel__dot:hover {
    background: rgba(255, 255, 255, 0.8);
}

.ds-featured-carousel__dot.is-active {
    background: var(--nebula-primary, #0EA5E9);
    transform: scale(1.2);
}

/* Carousel Arrows */
.ds-featured-carousel__arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.9);
    color: var(--nebula-secondary, #0F172A);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--nebula-shadow-md, 0 4px 6px rgba(0, 0, 0, 0.1));
    transition: all var(--nebula-duration-fast, 0.15s) var(--nebula-ease-out);
    z-index: 10;
}

.ds-featured-carousel__arrow:hover {
    background: var(--nebula-primary, #0EA5E9);
    color: #fff;
    transform: translateY(-50%) scale(1.05);
}

.ds-featured-carousel__arrow--prev {
    left: 16px;
}

.ds-featured-carousel__arrow--next {
    right: 16px;
}

/* Featured Link Cards */
.ds-featured-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.ds-featured-link-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--card-bg, var(--nebula-primary-light, #E0F2FE));
    border-radius: var(--nebula-radius-xl, 16px);
    text-decoration: none;
    transition: all var(--nebula-duration-normal, 0.2s) var(--nebula-ease-out);
    flex: 1;
    position: relative;
    overflow: hidden;
}

.ds-featured-link-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--nebula-shadow-lg, 0 10px 15px rgba(0, 0, 0, 0.1));
}

.ds-featured-link-card__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--nebula-radius-lg, 12px);
    background: var(--card-icon, var(--nebula-primary, #0EA5E9));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--nebula-duration-normal, 0.2s) var(--nebula-ease-out);
}

.ds-featured-link-card:hover .ds-featured-link-card__icon {
    transform: scale(1.1) rotate(-5deg);
}

.ds-featured-link-card__body {
    flex: 1;
    min-width: 0;
}

.ds-featured-link-card__title {
    font-size: var(--nebula-text-lg, 1.125rem);
    font-weight: var(--nebula-font-semibold, 600);
    color: var(--nebula-secondary, #0F172A);
    margin: 0 0 4px 0;
    line-height: 1.3;
}

.ds-featured-link-card__desc {
    font-size: var(--nebula-text-sm, 0.875rem);
    color: var(--nebula-text-secondary, #64748B);
    margin: 0;
    line-height: 1.4;
}

.ds-featured-link-card__arrow {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--card-icon, var(--nebula-primary, #0EA5E9));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--nebula-duration-normal, 0.2s) var(--nebula-ease-out);
}

.ds-featured-link-card:hover .ds-featured-link-card__arrow {
    transform: translateX(4px);
}

/* ============================
   Popular Articles
   ============================ */

.ds-popular-articles {
    margin-bottom: 32px;
    background: var(--nebula-bg, #FFFFFF);
    border-radius: var(--nebula-radius-xl, 16px);
    padding: 24px;
    box-shadow: var(--nebula-shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.05));
}

.ds-popular-articles__header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--nebula-border, #E2E8F0);
}

.ds-popular-articles__title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--nebula-text-lg, 1.125rem);
    font-weight: var(--nebula-font-semibold, 600);
    color: var(--nebula-secondary, #0F172A);
    margin: 0;
}

.ds-popular-articles__title svg {
    color: var(--nebula-accent, #F59E0B);
}

.ds-popular-articles__badge {
    padding: 4px 10px;
    background: var(--nebula-accent, #F59E0B);
    color: #fff;
    font-size: var(--nebula-text-xs, 0.75rem);
    font-weight: var(--nebula-font-bold, 700);
    border-radius: var(--nebula-radius-full, 9999px);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ds-popular-articles__list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ds-popular-article-item {
    border-radius: var(--nebula-radius-lg, 12px);
    transition: all var(--nebula-duration-fast, 0.15s) var(--nebula-ease-out);
}

.ds-popular-article-item:hover {
    background: var(--nebula-bg-secondary, #F8FAFC);
}

.ds-popular-article-item__link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    text-decoration: none;
    border-radius: var(--nebula-radius-lg, 12px);
}

.ds-popular-article-item__rank {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--nebula-text-sm, 0.875rem);
    font-weight: var(--nebula-font-bold, 700);
    color: var(--nebula-text-secondary, #64748B);
    background: var(--nebula-bg-secondary, #F8FAFC);
    border-radius: var(--nebula-radius-md, 8px);
    flex-shrink: 0;
}

.ds-popular-article-item__rank--top1,
.ds-popular-article-item__rank--top2,
.ds-popular-article-item__rank--top3 {
    background: var(--nebula-accent, #F59E0B);
    color: #fff;
}

.ds-popular-article-item__rank--top1 {
    background: linear-gradient(135deg, #F59E0B, #D97706);
}

.ds-popular-article-item__rank--top2 {
    background: linear-gradient(135deg, #94A3B8, #64748B);
}

.ds-popular-article-item__rank--top3 {
    background: linear-gradient(135deg, #CD7F32, #A0522D);
}

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

.ds-popular-article-item__title {
    font-size: var(--nebula-text-base, 1rem);
    font-weight: var(--nebula-font-medium, 500);
    color: var(--nebula-secondary, #0F172A);
    margin: 0 0 6px 0;
    line-height: 1.4;
    /* [P1-FIX] 多行截断替代单行截断 */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--nebula-duration-fast, 0.15s);
}

.ds-popular-article-item:hover .ds-popular-article-item__title {
    color: var(--nebula-primary, #0EA5E9);
}

.ds-popular-article-item__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: var(--nebula-text-xs, 0.75rem);
    color: var(--nebula-text-muted, var(--nebula-text-muted));
}

.ds-popular-article-item__cat {
    padding: 2px 8px;
    background: var(--nebula-primary-light, #E0F2FE);
    color: var(--nebula-primary-dark, #0284C7);
    border-radius: var(--nebula-radius-full, 9999px);
    font-weight: var(--nebula-font-medium, 500);
}

.ds-popular-article-item__views {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ds-popular-article-item__thumb {
    width: 60px;
    height: 45px;
    border-radius: var(--nebula-radius-md, 8px);
    overflow: hidden;
    flex-shrink: 0;
}

.ds-popular-article-item__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================
   Category Tabs
   ============================ */

.ds-category-tabs-wrapper {
    margin-bottom: 24px;
    background: var(--nebula-bg, #FFFFFF);
    border-radius: var(--nebula-radius-xl, 16px);
    padding: 16px 20px;
    box-shadow: var(--nebula-shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.05));
}

.ds-category-tabs-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.ds-category-tabs__inner {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex: 1;
}

.ds-cat-tab {
    padding: 8px 16px;
    background: var(--nebula-bg-secondary, #F8FAFC);
    border: 1px solid transparent;
    border-radius: var(--nebula-radius-full, 9999px);
    font-size: var(--nebula-text-sm, 0.875rem);
    font-weight: var(--nebula-font-medium, 500);
    color: var(--nebula-text-secondary, #64748B);
    cursor: pointer;
    transition: all var(--nebula-duration-fast, 0.15s) var(--nebula-ease-out);
}

.ds-cat-tab:hover {
    background: var(--nebula-bg-tertiary, #F1F5F9);
    border-color: var(--nebula-border, #E2E8F0);
}

.ds-cat-tab.active {
    background: linear-gradient(135deg, var(--nebula-primary, #0EA5E9), var(--nebula-secondary, #0F172A));
    color: #fff;
    border-color: transparent;
    box-shadow: var(--nebula-shadow-md, 0 4px 6px rgba(14, 165, 233, 0.3));
}

/* ============================
   Post List & Cards
   ============================ */

.ds-post-list-area {
    background: var(--nebula-bg, #FFFFFF);
    border-radius: var(--nebula-radius-xl, 16px);
    padding: 24px;
    box-shadow: var(--nebula-shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.05));
}

.ds-post-list {
    display: grid;
    gap: 20px;
}

.ds-post-list--cols-1 {
    grid-template-columns: 1fr;
}

.ds-post-list--cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.ds-post-list--cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Post Card */
.ds-post-card {
    background: var(--nebula-bg, #FFFFFF);
    border-radius: var(--nebula-radius-xl, 16px);
    overflow: hidden;
    border: 1px solid var(--nebula-border, #E2E8F0);
    transition: all var(--nebula-duration-normal, 0.2s) var(--nebula-ease-out);
}

.ds-post-card:hover {
    border-color: var(--nebula-primary, #0EA5E9);
    box-shadow: var(--nebula-shadow-lg, 0 10px 15px rgba(0, 0, 0, 0.1));
    transform: translateY(-2px);
}

.ds-post-card__image {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.ds-post-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--nebula-duration-slow, 0.3s) var(--nebula-ease-out);
}

.ds-post-card:hover .ds-post-card__image img {
    transform: scale(1.05);
}

.ds-post-card__category {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 10px;
    background: var(--nebula-primary, #0EA5E9);
    color: #fff;
    font-size: var(--nebula-text-xs, 0.75rem);
    font-weight: var(--nebula-font-semibold, 600);
    border-radius: var(--nebula-radius-full, 9999px);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ds-post-card__body {
    padding: 20px;
}

.ds-post-card__title {
    font-size: var(--nebula-text-lg, 1.125rem);
    font-weight: var(--nebula-font-semibold, 600);
    color: var(--nebula-secondary, #0F172A);
    margin: 0 0 12px 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ds-post-card:hover .ds-post-card__title {
    color: var(--nebula-primary, #0EA5E9);
}

.ds-post-card__excerpt {
    font-size: var(--nebula-text-sm, 0.875rem);
    color: var(--nebula-text-secondary, #64748B);
    line-height: 1.6;
    margin: 0 0 16px 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ds-post-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--nebula-border-light, #F1F5F9);
}

.ds-post-card__meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: var(--nebula-text-xs, 0.75rem);
    color: var(--nebula-text-muted, #94A3B8);
}

.ds-post-card__date,
.ds-post-card__views {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ds-post-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.ds-post-card__tag {
    padding: 3px 8px;
    background: var(--nebula-bg-secondary, #F8FAFC);
    color: var(--nebula-text-secondary, #64748B);
    font-size: var(--nebula-text-xs, 0.75rem);
    border-radius: var(--nebula-radius-full, 9999px);
    transition: all var(--nebula-duration-fast, 0.15s);
}

.ds-post-card__tag:hover {
    background: var(--nebula-primary-light, #E0F2FE);
    color: var(--nebula-primary, #0EA5E9);
}

/* ============================
   Load More
   ============================ */

.ds-load-more {
    text-align: center;
    padding: 24px;
    color: var(--nebula-text-secondary, #64748B);
    cursor: pointer;
    font-weight: var(--nebula-font-medium, 500);
    transition: color var(--nebula-duration-fast, 0.15s);
}

.ds-load-more:hover {
    color: var(--nebula-primary, #0EA5E9);
}

.ds-load-more.is-loading {
    pointer-events: none;
    opacity: 0.6;
}

/* ============================
   Sidebar Widgets
   ============================ */

.ds-sidebar-widget {
    background: var(--nebula-bg, #FFFFFF);
    border-radius: var(--nebula-radius-xl, 16px);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--nebula-shadow-sm, 0 1px 2px rgba(0, 0, 0, 0.05));
}

.ds-sidebar-widget__title {
    font-size: var(--nebula-text-base, 1rem);
    font-weight: var(--nebula-font-semibold, 600);
    color: var(--nebula-secondary, #0F172A);
    margin: 0 0 16px 0;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--nebula-primary, #0EA5E9);
    display: flex;
    align-items: center;
    gap: 8px;
}

.ds-sidebar-widget__title svg {
    color: var(--nebula-primary, #0EA5E9);
}

/* ============================
   Nebula Widget (Legacy)
   ============================ */

.nebula-widget {
    background: var(--nebula-bg, #FFFFFF);
    border-radius: var(--nebula-radius-lg, 12px);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--nebula-shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.08));
}

.nebula-widget .widget-title,
.nebula-widget .widgettitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--nebula-text-primary, #1E293B);
    margin: 0 0 16px 0;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--nebula-primary, #0EA5E9);
}

.nebula-widget ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.nebula-widget li {
    padding: 10px 0;
    border-bottom: 1px solid var(--nebula-border, #E2E8F0);
}

.nebula-widget li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.nebula-widget li a {
    color: var(--nebula-text-secondary, #64748B);
    text-decoration: none;
    transition: color 0.2s ease;
}

.nebula-widget li a:hover {
    color: var(--nebula-primary, #0EA5E9);
}

/* Widget in content area */
.nebula-content-area {
    margin: 24px 0;
}

.nebula-content-area-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--nebula-text-primary, #1E293B);
    margin: 0 0 16px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--nebula-primary, #0EA5E9);
}

/* ============================
   No Results
   ============================ */

.ds-no-results {
    text-align: center;
    padding: 60px 20px;
}

.ds-no-results h2 {
    font-size: var(--nebula-text-2xl, 1.5rem);
    color: var(--nebula-secondary, #0F172A);
    margin-bottom: 12px;
}

.ds-no-results p {
    color: var(--nebula-text-secondary, #64748B);
}

/* ============================
   Responsive
   ============================ */

@media (max-width: 992px) {
    .ds-featured-area__inner {
        grid-template-columns: 1fr;
    }

    .ds-featured-links {
        flex-direction: row;
    }

    .ds-featured-link-card {
        flex-direction: column;
        text-align: center;
    }

    .ds-featured-link-card__arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    .ds-featured-links {
        flex-direction: column;
    }

    .ds-post-list--cols-2,
    .ds-post-list--cols-3 {
        grid-template-columns: 1fr;
    }

    .ds-popular-articles__list {
        gap: 8px;
    }

    .ds-popular-article-item__thumb {
        display: none;
    }
}

/* ============================
   Dark Mode
   ============================ */

[data-theme="dark"] .ds-featured-carousel,
[data-theme="dark"] .ds-category-tabs-wrapper,
[data-theme="dark"] .ds-post-list-area,
[data-theme="dark"] .ds-popular-articles,
[data-theme="dark"] .ds-post-card,
[data-theme="dark"] .ds-sidebar-widget {
    background: var(--nebula-bg-secondary, #1E293B);
    border-color: var(--nebula-border, #334155);
}

[data-theme="dark"] .ds-cat-tab {
    background: var(--nebula-bg-tertiary, #334155);
    color: var(--nebula-text-secondary, #94A3B8);
}

[data-theme="dark"] .ds-cat-tab:hover {
    background: var(--nebula-bg-secondary, #1E293B);
}

[data-theme="dark"] .ds-popular-article-item__rank {
    background: var(--nebula-bg-tertiary, #334155);
    color: var(--nebula-text-secondary, #94A3B8);
}

[data-theme="dark"] .ds-popular-article-item:hover {
    background: var(--nebula-bg-tertiary, #334155);
}

/* ============================
   Animation Utilities
   ============================ */

/* Fade Animations */
@keyframes nebula-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes nebula-fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes nebula-fade-in-down {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes nebula-fade-in-left {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes nebula-fade-in-right {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scale Animations */
@keyframes nebula-scale-in {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Pulse Animation */
@keyframes nebula-pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.02);
    }
}

/* Shimmer Loading Animation */
@keyframes nebula-shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Float Animation */
@keyframes nebula-float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

/* Animation Utility Classes */
.nebula-animate-fade-in {
    animation: nebula-fade-in 0.4s ease-out forwards;
}

.nebula-animate-fade-in-up {
    animation: nebula-fade-in-up 0.5s ease-out forwards;
}

.nebula-animate-fade-in-down {
    animation: nebula-fade-in-down 0.5s ease-out forwards;
}

.nebula-animate-fade-in-left {
    animation: nebula-fade-in-left 0.5s ease-out forwards;
}

.nebula-animate-fade-in-right {
    animation: nebula-fade-in-right 0.5s ease-out forwards;
}

.nebula-animate-scale-in {
    animation: nebula-scale-in 0.3s ease-out forwards;
}

.nebula-animate-pulse {
    animation: nebula-pulse 2s ease-in-out infinite;
}

.nebula-animate-float {
    animation: nebula-float 3s ease-in-out infinite;
}

/* Animation Delays */
.nebula-delay-100 { animation-delay: 100ms; }
.nebula-delay-200 { animation-delay: 200ms; }
.nebula-delay-300 { animation-delay: 300ms; }
.nebula-delay-400 { animation-delay: 400ms; }
.nebula-delay-500 { animation-delay: 500ms; }

/* Hover Lift Effect */
.nebula-hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.nebula-hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(14, 165, 233, 0.15);
}

/* Hover Glow Effect */
.nebula-hover-glow {
    transition: box-shadow 0.3s ease;
}
.nebula-hover-glow:hover {
    box-shadow: 0 0 24px rgba(14, 165, 233, 0.25);
}

/* Hover Scale Effect */
.nebula-hover-scale {
    transition: transform 0.3s ease;
}
.nebula-hover-scale:hover {
    transform: scale(1.03);
}

/* Stagger Animation for Lists */
.nebula-stagger > *:nth-child(1) { animation-delay: 0ms; }
.nebula-stagger > *:nth-child(2) { animation-delay: 50ms; }
.nebula-stagger > *:nth-child(3) { animation-delay: 100ms; }
.nebula-stagger > *:nth-child(4) { animation-delay: 150ms; }
.nebula-stagger > *:nth-child(5) { animation-delay: 200ms; }
.nebula-stagger > *:nth-child(6) { animation-delay: 250ms; }
.nebula-stagger > *:nth-child(7) { animation-delay: 300ms; }
.nebula-stagger > *:nth-child(8) { animation-delay: 350ms; }
.nebula-stagger > *:nth-child(9) { animation-delay: 400ms; }
.nebula-stagger > *:nth-child(10) { animation-delay: 450ms; }

/* ============================
   Text Utilities
   ============================ */
.text-gradient-primary {
    background: linear-gradient(135deg, var(--nebula-primary) 0%, var(--nebula-primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-accent {
    background: linear-gradient(135deg, var(--nebula-accent) 0%, var(--nebula-accent-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-shadow-sm {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.text-shadow-md {
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* ============================
   Transition Utilities
   ============================ */
.transition-all {
    transition: all 0.25s ease;
}

.transition-colors {
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.transition-transform {
    transition: transform 0.25s ease;
}

.transition-opacity {
    transition: opacity 0.25s ease;
}

/* ============================
   Shimmer Loading Effect
   ============================ */
.nebula-shimmer {
    background: linear-gradient(
        90deg,
        var(--nebula-bg-secondary) 0%,
        var(--nebula-bg-tertiary) 50%,
        var(--nebula-bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: nebula-shimmer 1.5s ease-in-out infinite;
}

/* ============================
   Focus States
   ============================ */
.nebula-focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.3);
}

.nebula-focus-ring:focus-visible {
    outline: 2px solid var(--nebula-primary);
    outline-offset: 2px;
}

/* ============================
   Modern Glassmorphism Effects
   ============================ */

/* Glass Card - Frosted Glass Effect */
.nebula-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(var(--blur-lg, 16px));
    -webkit-backdrop-filter: blur(var(--blur-lg, 16px));
    border: 1px solid rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .nebula-glass {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Glass Button */
.nebula-glass-btn {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(var(--blur-md, 8px));
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    transition: all var(--duration-fast) var(--ease-out);
}

.nebula-glass-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

/* ============================
   Modern Spring Animations
   ============================ */

/* Spring Bounce In */
@keyframes nebula-spring-in {
    0% {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    50% {
        transform: scale(1.05) translateY(-5px);
    }
    70% {
        transform: scale(0.98) translateY(2px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.nebula-spring-in {
    animation: nebula-spring-in 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

/* Soft Bounce */
@keyframes nebula-soft-bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-6px);
    }
}

.nebula-soft-bounce {
    animation: nebula-soft-bounce 2s ease-in-out infinite;
}

/* Wiggle */
@keyframes nebula-wiggle {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-3deg); }
    75% { transform: rotate(3deg); }
}

.nebula-wiggle:hover {
    animation: nebula-wiggle 0.4s ease-in-out;
}

/* ============================
   Modern Reveal Animations
   ============================ */

/* Reveal on Scroll */
.nebula-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.nebula-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Reveal from Left */
.nebula-reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.nebula-reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* Reveal from Right */
.nebula-reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.nebula-reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* Scale Reveal */
.nebula-reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

.nebula-reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* ============================
   Modern Hover Effects
   ============================ */

/* 3D Tilt Effect */
.nebula-tilt {
    transform-style: preserve-3d;
    transition: transform 0.3s var(--ease-out);
}

.nebula-tilt:hover {
    transform: perspective(1000px) rotateX(2deg) rotateY(-2deg);
}

/* Shine Effect */
.nebula-shine {
    position: relative;
    overflow: hidden;
}

.nebula-shine::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.3) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: rotate(30deg) translateX(-100%);
    transition: transform 0.6s var(--ease-out);
}

.nebula-shine:hover::after {
    transform: rotate(30deg) translateX(100%);
}

/* Border Glow */
.nebula-border-glow {
    position: relative;
}

.nebula-border-glow::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600), var(--primary-400));
    border-radius: inherit;
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s var(--ease-out);
}

.nebula-border-glow:hover::before {
    opacity: 1;
}

/* ============================
   Modern Badge Styles
   ============================ */

.nebula-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    line-height: 1;
    border-radius: var(--radius-full);
}

.nebula-badge-primary {
    background: var(--primary-100);
    color: var(--primary-700);
}

.nebula-badge-success {
    background: var(--success-100);
    color: var(--success-700);
}

.nebula-badge-warning {
    background: var(--warning-100);
    color: var(--warning-700);
}

.nebula-badge-error {
    background: var(--error-100);
    color: var(--error-700);
}

/* Pulsing Badge */
.nebula-badge-pulse::before {
    content: '';
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    animation: badge-pulse 1.5s ease-in-out infinite;
}

@keyframes badge-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* ============================
   Modern Avatar Styles
   ============================ */

.nebula-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-100);
    color: var(--primary-700);
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
    overflow: hidden;
}

.nebula-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.nebula-avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--text-xs);
}

.nebula-avatar-lg {
    width: 56px;
    height: 56px;
    font-size: var(--text-lg);
}

.nebula-avatar-xl {
    width: 80px;
    height: 80px;
    font-size: var(--text-xl);
}

/* Avatar Stack */
.nebula-avatar-stack {
    display: flex;
}

.nebula-avatar-stack .nebula-avatar {
    margin-left: -8px;
    border: 2px solid var(--bg-primary);
}

.nebula-avatar-stack .nebula-avatar:first-child {
    margin-left: 0;
}

/* ============================
   Modern Divider
   ============================ */

.nebula-divider {
    height: 1px;
    background: var(--border-primary);
    margin: var(--space-6) 0;
}

.nebula-divider-gradient {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-300), transparent);
    border: none;
}

/* ============================
   Modern Skeleton Loader
   ============================ */

.nebula-skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-secondary) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

.nebula-skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.nebula-skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: 1em;
}

.nebula-skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
}

.nebula-skeleton-image {
    width: 100%;
    aspect-ratio: 16 / 9;
}

/* ============================
   Enhanced Dark Mode
   ============================ */

[data-theme="dark"] {
    /* Improved contrast in dark mode */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-primary: #334155;
}

[data-theme="dark"] .ds-featured-carousel,
[data-theme="dark"] .ds-category-tabs-wrapper,
[data-theme="dark"] .ds-post-list-area,
[data-theme="dark"] .ds-popular-articles,
[data-theme="dark"] .ds-post-card,
[data-theme="dark"] .ds-sidebar-widget,
[data-theme="dark"] .nebula-card {
    background: var(--bg-secondary);
    border-color: var(--border-primary);
}

[data-theme="dark"] .ds-cat-tab,
[data-theme="dark"] .nebula-tag {
    background: var(--bg-tertiary);
    border-color: var(--border-primary);
    color: var(--text-secondary);
}

[data-theme="dark"] .ds-cat-tab:hover,
[data-theme="dark"] .nebula-tag:hover {
    background: var(--primary-900);
    border-color: var(--primary-700);
    color: var(--primary-100);
}

[data-theme="dark"] .ds-popular-article-item__rank {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

[data-theme="dark"] .ds-popular-article-item:hover {
    background: var(--bg-tertiary);
}

/* Dark mode shadows */
[data-theme="dark"] .nebula-card,
[data-theme="dark"] .ds-featured-carousel {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .nebula-card:hover,
[data-theme="dark"] .ds-featured-carousel:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}