/* ===== TurboNeko Blog — blog.css ===== */
/* 继承 TurboNeko Studio 的设计语言 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ========== CSS Variables — Dark Theme ========== */
:root {
    --bg: #0A0A14;
    --bg-card: #12121E;
    --bg-footer: #060610;
    --bg-nav: rgba(10,10,20,0.70);
    --bg-nav-scrolled: rgba(10,10,20,0.92);
    --primary: #8B5CF6;
    --primary-light: #A78BFA;
    --cyan: #38BDF8;
    --green: #34D399;
    --pink: #EC4899;
    --text: #F1F0FB;
    --text-dim: #9CA3AF;
    --text-muted: #6B7280;
    --border: rgba(255,255,255,0.08);
    --border-hover: rgba(139,92,246,0.25);
    --card-hover-shadow: rgba(0,0,0,0.4);
    --tag-bg: rgba(139,92,246,0.15);
    --hero-overlay: rgba(10,10,20,0.55);
    --code-bg: #1A1A2E;
    --blockquote-border: #8B5CF6;
}

/* ========== Light Theme ========== */
[data-theme="light"] {
    --bg: #F8F9FC;
    --bg-card: #FFFFFF;
    --bg-footer: #F0F1F5;
    --bg-nav: rgba(248,249,252,0.80);
    --bg-nav-scrolled: rgba(248,249,252,0.96);
    --primary: #7C3AED;
    --primary-light: #8B5CF6;
    --cyan: #0284C7;
    --green: #059669;
    --pink: #DB2777;
    --text: #1A1A2E;
    --text-dim: #4B5563;
    --text-muted: #6B7280;
    --border: rgba(0,0,0,0.08);
    --border-hover: rgba(124,58,237,0.20);
    --card-hover-shadow: rgba(124,58,237,0.12);
    --tag-bg: rgba(124,58,237,0.10);
    --hero-overlay: rgba(248,249,252,0.35);
    --code-bg: #F0F1F5;
    --blockquote-border: #7C3AED;
}

/* ========== Reset ========== */
*, *::before, *::after { margin:0; padding:0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
    transition: background 0.4s, color 0.4s;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; height: auto; }

button {
    font-family: inherit;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 0;
    margin: 0;
    font-size: inherit;
    -webkit-appearance: none;
    appearance: none;
}

/* ========== Navigation ========== */
nav {
    position: fixed; top:0; left:0; right:0;
    z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 56px;
    height: 72px;
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.4s;
}
nav.scrolled {
    background: var(--bg-nav-scrolled);
}

.nav-left { display: flex; align-items: center; gap: 12px; }

.nav-logo {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; color: var(--text);
}
.nav-logo-img-wrap {
    display: flex; align-items: center; justify-content: center;
    height: 40px;
    padding: 0 8px;
    background: rgba(124,58,237,0.06);
    border: none;
    border-radius: 6px;
    transition: background 0.3s;
}
.nav-logo-img-wrap:hover {
    background: rgba(124,58,237,0.12);
}
.nav-logo-img-wrap img {
    height: 28px !important;
    width: auto;
    filter: brightness(1.5);
    transition: filter 0.3s;
}
[data-theme="light"] .nav-logo-img-wrap img {
    filter: brightness(1.0);
}
.nav-logo-img-wrap:hover img {
    filter: brightness(1.8);
}
.nav-logo .logo-text {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.nav-logo .logo-sub {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 1px;
}

.nav-right { display: flex; align-items: center; gap: 16px; }

.nav-links {
    display: flex; align-items: center; gap: 32px;
    list-style: none;
}
.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 1px;
    transition: color 0.25s;
    position: relative;
    padding-bottom: 4px;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--primary-light); }
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

/* Nav controls */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    z-index: 10;
}

.nav-lang-switch {
    display: flex; align-items: center;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-dim);
    background: rgba(139,92,246,0.15);
    border: 1px solid rgba(139,92,246,0.28);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    transition: all 0.3s;
}
.nav-lang-switch:hover {
    color: var(--primary-light);
    background: rgba(139,92,246,0.25);
    border-color: rgba(139,92,246,0.45);
    box-shadow: 0 0 16px rgba(139,92,246,0.20);
}
.nav-lang-switch .lang-active {
    color: var(--primary-light);
}

/* ========== Mobile Menu ========== */
.hamburger {
    display: none;
    flex-direction: column; gap: 5px;
    background: none; border: none;
    cursor: pointer; padding: 8px;
    position: relative;
    z-index: 100000;
}
.hamburger span {
    display: block; width: 22px; height: 2px;
    background: var(--text-dim); border-radius: 1px;
    transition: all 0.3s;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 9999;
    background: rgba(10,10,20,0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
[data-theme="light"] .mobile-menu {
    background: rgba(248,249,252,0.97);
}
.mobile-menu.open { display: flex; cursor: pointer; }
.mobile-menu > * { cursor: default; }
.mobile-menu a {
    color: var(--text-dim); text-decoration: none;
    font-size: 18px; font-weight: 600;
    letter-spacing: 2px;
    padding: 12px 24px; transition: color 0.25s;
}
.mobile-menu a:hover { color: var(--primary-light); }
.mobile-menu .close-btn {
    position: absolute; top: 20px; right: 20px;
    background: none; border: none; color: var(--text-dim);
    cursor: pointer; padding: 8px; z-index: 1;
}

/* ========== Hero / Page Header ========== */
.page-header {
    position: relative;
    padding: 120px 56px 80px;
    text-align: center;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}
.page-header-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(139,92,246,0.10), transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(56,189,248,0.08), transparent 50%);
}
.page-header-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
}
.page-header h1 {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: 16px;
    line-height: 1.1;
}
.page-header h1 .gradient {
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.page-header .subtitle {
    font-size: 15px;
    color: var(--text-dim);
    line-height: 1.8;
    max-width: 520px;
    margin: 0 auto;
}

/* ========== Blog Layout ========== */
.blog-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 56px 80px;
}

/* ========== Blog Posts Grid ========== */
.blog-posts {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* Featured Post */
.blog-post.featured {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.35s;
}
.blog-post.featured:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px var(--card-hover-shadow);
}
.blog-post.featured .post-cover {
    height: 280px;
    background: linear-gradient(135deg, #1A1A2E, #12121E);
    position: relative;
    overflow: hidden;
}
[data-theme="light"] .blog-post.featured .post-cover {
    background: linear-gradient(135deg, #E5E7EB, #F0F1F5);
}
.blog-post.featured .post-cover::before {
    content: attr(data-emoji);
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 80px;
    opacity: 0.15;
}
.blog-post.featured .post-cover .post-category {
    position: absolute;
    top: 16px; left: 16px;
    z-index: 2;
}
.blog-post.featured .post-body {
    padding: 28px 32px;
}
.blog-post.featured .post-title {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 12px;
    line-height: 1.3;
    transition: color 0.25s;
}
.blog-post.featured:hover .post-title {
    color: var(--primary-light);
}
.blog-post.featured .post-excerpt {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 20px;
}

/* Regular Posts */
.blog-post.regular {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.35s;
    cursor: pointer;
}
.blog-post.regular:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px var(--card-hover-shadow);
}
.blog-post.regular .post-cover {
    height: 100%;
    min-height: 160px;
    background: linear-gradient(135deg, #1A1A2E, #12121E);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
[data-theme="light"] .blog-post.regular .post-cover {
    background: linear-gradient(135deg, #E5E7EB, #F0F1F5);
}
.blog-post.regular .post-cover::before {
    content: attr(data-emoji);
    font-size: 48px;
    opacity: 0.2;
}
.blog-post.regular .post-body {
    padding: 20px 20px 20px 0;
}
.blog-post.regular .post-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
    transition: color 0.25s;
}
.blog-post.regular:hover .post-title {
    color: var(--primary-light);
}
.blog-post.regular .post-excerpt {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Post Meta */
.post-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}
.post-date {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}
.post-date svg {
    width: 14px; height: 14px;
    vertical-align: middle;
    margin-right: 4px;
}
.post-category {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
.post-category.dev {
    background: rgba(56,189,248,0.15);
    color: var(--cyan);
}
.post-category.tech {
    background: rgba(139,92,246,0.15);
    color: var(--primary-light);
}
.post-category.design {
    background: rgba(236,72,153,0.15);
    color: var(--pink);
}
.post-category.life {
    background: rgba(52,211,153,0.15);
    color: var(--green);
}

.post-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.post-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 500;
    background: var(--tag-bg);
    color: var(--primary-light);
    border: 1px solid rgba(139,92,246,0.1);
}

.post-readmore {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-light);
    transition: gap 0.25s;
}
.post-readmore svg {
    width: 14px; height: 14px;
    transition: transform 0.25s;
}
.blog-post:hover .post-readmore svg {
    transform: translateX(4px);
}

/* ========== Sidebar ========== */
.blog-sidebar {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.sidebar-widget {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px;
}
.sidebar-widget-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary-light);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

/* Search */
.search-box {
    position: relative;
}
.search-box input {
    width: 100%;
    padding: 10px 14px 10px 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.25s;
}
.search-box input:focus {
    border-color: var(--primary);
}
.search-box input::placeholder {
    color: var(--text-muted);
}
.search-box .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 18px;
    height: 18px;
}

/* Category List */
.category-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-dim);
    transition: all 0.25s;
    cursor: pointer;
}
.category-item:hover {
    background: rgba(139,92,246,0.06);
    color: var(--primary-light);
}
.category-item .count {
    font-size: 11px;
    color: var(--text-muted);
    background: var(--tag-bg);
    padding: 1px 8px;
    border-radius: 10px;
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.tag-cloud .tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    background: var(--tag-bg);
    color: var(--text-dim);
    border: 1px solid rgba(139,92,246,0.08);
    transition: all 0.25s;
    cursor: pointer;
}
.tag-cloud .tag:hover {
    background: rgba(139,92,246,0.25);
    color: var(--primary-light);
    border-color: rgba(139,92,246,0.3);
}

/* Recent Posts Widget */
.recent-posts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.recent-post-item {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.25s;
}
.recent-post-item:last-child {
    border-bottom: none;
}
.recent-post-item:hover .recent-post-title {
    color: var(--primary-light);
}
.recent-post-icon {
    font-size: 24px;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--tag-bg);
    border-radius: 8px;
}
.recent-post-info {
    flex: 1;
    min-width: 0;
}
.recent-post-title {
    font-size: 13px;
    font-weight: 600;
    transition: color 0.25s;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.recent-post-date {
    font-size: 11px;
    color: var(--text-muted);
}

/* ========== Post Detail Page ========== */
.post-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 120px 56px 80px;
}
.post-detail-header {
    margin-bottom: 40px;
}
.post-detail-header .post-meta {
    margin-bottom: 16px;
}
.post-detail-header h1 {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 16px;
}
.post-detail-header .post-excerpt {
    font-size: 16px;
    color: var(--text-dim);
    line-height: 1.8;
}

/* Post Content */
.post-content {
    font-size: 15px;
    line-height: 1.9;
    color: var(--text);
}
.post-content h2 {
    font-size: 24px;
    font-weight: 800;
    margin-top: 48px;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.post-content h3 {
    font-size: 19px;
    font-weight: 700;
    margin-top: 32px;
    margin-bottom: 12px;
}
.post-content p {
    margin-bottom: 20px;
    color: var(--text-dim);
}
.post-content a {
    color: var(--primary-light);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.25s;
}
.post-content a:hover {
    color: var(--cyan);
}
.post-content strong {
    color: var(--text);
    font-weight: 700;
}
.post-content ul, .post-content ol {
    margin-bottom: 20px;
    padding-left: 24px;
    color: var(--text-dim);
}
.post-content li {
    margin-bottom: 6px;
}
.post-content ul li::marker {
    color: var(--primary);
}
.post-content blockquote {
    margin: 24px 0;
    padding: 16px 24px;
    border-left: 3px solid var(--blockquote-border);
    background: var(--tag-bg);
    border-radius: 0 8px 8px 0;
    color: var(--text-dim);
    font-style: italic;
}
.post-content blockquote p {
    margin-bottom: 0;
}
.post-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    padding: 2px 8px;
    border-radius: 4px;
    background: var(--code-bg);
    color: var(--cyan);
    border: 1px solid var(--border);
}
.post-content pre {
    margin: 24px 0;
    padding: 20px 24px;
    border-radius: 10px;
    background: var(--code-bg);
    border: 1px solid var(--border);
    overflow-x: auto;
}
.post-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--text);
    font-size: 13px;
    line-height: 1.7;
}
.post-content img {
    border-radius: 10px;
    margin: 24px 0;
    border: 1px solid var(--border);
}
.post-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 40px 0;
}

/* Post Footer */
.post-footer {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.post-share {
    display: flex;
    align-items: center;
    gap: 8px;
}
.post-share span {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}
.post-share a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--border);
    color: var(--text-muted);
    transition: all 0.25s;
}
.post-share a:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: var(--tag-bg);
}
.post-share svg {
    width: 16px;
    height: 16px;
}

.post-nav {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.post-nav a {
    flex: 1;
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-radius: 10px;
    transition: all 0.3s;
    max-width: 50%;
}
.post-nav a:hover {
    border-color: var(--border-hover);
    background: var(--tag-bg);
}
.post-nav .nav-label {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 4px;
}
.post-nav .nav-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}
.post-nav a:hover .nav-title {
    color: var(--primary-light);
}
.post-nav .nav-next {
    text-align: right;
}

/* ========== Footer ========== */
footer {
    background: var(--bg-footer);
    border-top: 1px solid var(--border);
    padding: 64px 56px 32px;
    transition: background 0.4s;
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 64px;
}
.footer-brand p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 300px;
    margin-top: 12px;
}
.footer-brand .footer-logo {
    font-size: 20px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-col h5 {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text);
    margin-bottom: 20px;
}
.footer-links li { margin-bottom: 12px; }
.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.25s;
}
.footer-links a:hover { color: var(--primary-light); }
.social-icons {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
}
.social-icons a {
    color: var(--text-muted);
    transition: color 0.25s;
}
.social-icons a:hover { color: var(--primary-light); }
.social-icons svg { width: 20px; height: 20px; }
.contact-info p {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.footer-bottom {
    max-width: 1200px;
    margin: 48px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
}
.footer-bottom p { font-size: 12px; color: var(--text-muted); }

/* ========== Animations ========== */
.fade-up {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(.22,1,.36,1),
                transform 0.7s cubic-bezier(.22,1,.36,1);
}
.js-enabled .fade-up {
    opacity: 0;
    transform: translateY(40px);
}
.js-enabled .fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}
.fade-up.delay-1 { transition-delay: 0.10s; }
.fade-up.delay-2 { transition-delay: 0.20s; }
.fade-up.delay-3 { transition-delay: 0.30s; }
.fade-up.delay-4 { transition-delay: 0.40s; }
.fade-up.delay-5 { transition-delay: 0.50s; }

.stagger-fade > * {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s cubic-bezier(.22,1,.36,1),
                transform 0.6s cubic-bezier(.22,1,.36,1);
}
.js-enabled .stagger-fade > * {
    opacity: 0;
    transform: translateY(24px);
}
.js-enabled .stagger-fade > *.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== Loading / Empty States ========== */
.loading-state, .empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.loading-state .spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
.empty-state svg {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.empty-state p {
    font-size: 14px;
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(139,92,246,0.15);
    border: 1px solid rgba(139,92,246,0.3);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--primary-light);
    cursor: pointer;
    transition: all 0.3s;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.back-to-top:hover {
    background: rgba(139,92,246,0.28);
    border-color: rgba(139,92,246,0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(139,92,246,0.2);
}
.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    nav { padding: 0 32px; }
    .page-header { padding: 100px 32px 60px; }
    .blog-layout { grid-template-columns: 1fr; padding: 32px 32px 60px; }
    .blog-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .post-detail { padding: 100px 32px 60px; }
    footer { padding: 48px 32px 24px; }
    .footer-inner { gap: 48px; }
}

@media (max-width: 768px) {
    nav { padding: 0 16px; height: 60px; }
    .nav-links { display: none; }
    .nav-right { gap: 8px; }
    .hamburger { display: flex; }
    .page-header { padding: 80px 20px 48px; }
    .page-header h1 { font-size: clamp(28px, 8vw, 40px); }

    .blog-layout { padding: 24px 16px 48px; }
    .blog-sidebar { grid-template-columns: 1fr; }

    .blog-post.featured .post-cover { height: 200px; }
    .blog-post.featured .post-body { padding: 20px; }
    .blog-post.featured .post-title { font-size: 20px; }

    .blog-post.regular {
        grid-template-columns: 1fr;
    }
    .blog-post.regular .post-cover {
        min-height: 120px;
        height: 120px;
    }
    .blog-post.regular .post-body {
        padding: 16px;
    }

    .post-detail { padding: 80px 20px 48px; }
    .post-detail-header h1 { font-size: clamp(24px, 6vw, 32px); }

    .post-nav { flex-direction: column; }
    .post-nav a { max-width: 100%; }

    footer { padding: 40px 20px 24px; }
    .footer-inner { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { text-align: center; }

    .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}

@media (max-width: 480px) {
    nav { padding: 0 12px; height: 56px; }
    .nav-logo svg { width: 26px; height: 26px; }
    .nav-logo .logo-text { font-size: 15px; }
    .nav-logo .logo-sub { font-size: 10px; }
    .nav-lang-switch { padding: 4px 10px; font-size: 11px; }
    .hamburger span { width: 18px; }
    .page-header { padding: 72px 16px 40px; }
    .blog-layout { padding: 16px 12px 40px; gap: 16px; }
    .blog-posts { gap: 20px; }
    .post-content { font-size: 14px; }
    .post-content h2 { font-size: 20px; }
    .post-content pre { padding: 14px 16px; }
}