/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--color-primary); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

/* === SKIP LINK & SCREEN READER === */
.stb-skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 10000;
    padding: 8px 16px;
    background: var(--color-text);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 700;
}
.stb-skip-link:focus { top: 8px; }
.stb-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* === FOCUS VISIBLE === */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) { outline: none; }

/* === CONTAINER === */
.stb-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 16px;
}

/* === LAYOUT: MAIN + SIDEBAR === */
.stb-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}
.stb-main { flex: 1; min-width: 0; }
.stb-sidebar { width: 320px; flex-shrink: 0; }

/* === SECTIONS === */
.stb-section { padding: 40px 0; }
.stb-layout--padded { padding: 32px 0; }
.stb-section--surface { background: var(--color-surface); }

/* === SECTION TITLES === */
.stb-section-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}
.stb-section-title a { color: inherit; }
.stb-section-title--decorated {
    text-align: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}
.stb-section-title--decorated::before,
.stb-section-title--decorated::after {
    content: '';
    flex: 1;
    max-width: 80px;
    height: 1px;
    background: var(--color-border);
}

/* === SECTION HEADER CENTER === */
.stb-section-header-center { text-align: center; margin-bottom: 32px; }
.stb-section-subtitle-link {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary);
}
.stb-section-subtitle-link:hover { color: var(--color-primary); }

/* === GRIDS === */
.stb-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.stb-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.stb-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* === BADGE (category label) === */
.stb-badge {
    display: inline-block;
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 3px 8px;
    color: #fff;
    background: var(--color-text);
    line-height: 1.4;
}
.stb-badge a { color: #fff; }
.stb-badge-1 { background: var(--color-badge-1); }
.stb-badge-2 { background: var(--color-badge-2); }
.stb-badge-3 { background: var(--color-badge-3); }
.stb-badge-4 { background: var(--color-badge-4); }

/* === CARD (grid item) === */
.stb-card { background: var(--color-card-bg); }
.stb-card-thumb {
    position: relative;
    overflow: hidden;
    line-height: 0;
}
.stb-card-thumb img {
    width: 100%;
    height: auto;
    transition: transform 0.3s ease;
}
.stb-card:hover .stb-card-thumb img { transform: scale(1.03); }
.stb-card-thumb .stb-badge {
    position: absolute;
    bottom: 12px;
    left: 12px;
    z-index: 2;
}
.stb-card-body { padding: 16px 0; }
.stb-card-title {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 8px;
}
.stb-card-title a:hover { color: var(--color-primary); }
.stb-card-meta {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}
.stb-meta-sep { margin: 0 4px; }
.stb-card-placeholder {
    width: 100%;
    aspect-ratio: 370/250;
    background: var(--color-surface);
}
.stb-card-placeholder-dark {
    width: 100%;
    aspect-ratio: 770/515;
    background: #333;
}

/* === CARD OVERLAY === */
.stb-card-overlay {
    position: relative;
    overflow: hidden;
    line-height: 0;
}
.stb-card-overlay-link { display: block; }
.stb-card-overlay-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.stb-card-overlay:hover .stb-card-overlay-link img { transform: scale(1.03); }
.stb-card-overlay-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(transparent, rgba(0,0,0,0.75));
    color: #fff;
    line-height: 1.4;
}
.stb-card-overlay-content .stb-badge { margin-bottom: 8px; }
.stb-card-overlay-title {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 8px;
}
.stb-card-overlay-title a { color: #fff; }
.stb-card-overlay-title a:hover { opacity: 0.85; }
.stb-card-overlay-title--large { font-size: 1.75rem; }
.stb-card-overlay-meta {
    font-size: 0.8125rem;
    color: rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}
.stb-card-overlay-meta .stb-avatar { border-radius: 50%; margin-right: 4px; }
.stb-read-more-overlay {
    display: inline-block;
    margin-top: 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: rgba(255,255,255,0.8);
    border-bottom: 1px solid rgba(255,255,255,0.4);
}
.stb-read-more-overlay:hover { color: #fff; }

/* === LIST POST (horizontal) === */
.stb-list-post {
    display: flex;
    gap: 32px;
    padding: 32px 0;
    border-bottom: 1px solid var(--color-border);
}
.stb-list-post:first-child { padding-top: 0; }
.stb-list-post-content { flex: 1; min-width: 0; }
.stb-list-post-content .stb-badge { margin-bottom: 12px; }
.stb-list-post-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 12px;
}
.stb-list-post-title a:hover { color: var(--color-primary); }
.stb-list-post-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}
.stb-list-post-meta {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}
.stb-read-more {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text);
    margin-left: auto;
}
.stb-read-more:hover { color: var(--color-primary); }
.stb-list-post-thumb {
    width: 380px;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    line-height: 0;
}
.stb-list-post-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.stb-list-post:hover .stb-list-post-thumb img { transform: scale(1.03); }
.stb-badge-img {
    position: absolute;
    bottom: 12px;
    right: 12px;
}

/* === HORIZONTAL POST (single large) === */
.stb-horizontal-post {
    display: flex;
    gap: 32px;
    align-items: center;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--color-border);
}
.stb-horizontal-post-content { flex: 1; min-width: 0; }
.stb-horizontal-post-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 12px;
}
.stb-horizontal-post-title a:hover { color: var(--color-primary); }
.stb-horizontal-post-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}
.stb-horizontal-post-meta {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.stb-horizontal-post-meta .stb-avatar { border-radius: 50%; margin-right: 4px; }
.stb-horizontal-post-thumb {
    width: 380px;
    flex-shrink: 0;
    overflow: hidden;
    line-height: 0;
}
.stb-horizontal-post-thumb img { width: 100%; height: auto; transition: transform 0.3s ease; }
.stb-horizontal-post:hover .stb-horizontal-post-thumb img { transform: scale(1.03); }

/* === LOAD MORE === */
.stb-load-more-center { text-align: center; padding: 32px 0; }
.stb-load-more-btn {
    display: inline-block;
    padding: 12px 32px;
    border: 2px solid var(--color-text);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text);
    transition: all 0.2s ease;
}
.stb-load-more-btn:hover {
    background: var(--color-text);
    color: #fff;
}
.stb-more-link-center { text-align: center; margin-top: 24px; }
.stb-more-link {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-text);
}
.stb-more-link:hover { color: var(--color-primary); }

/* === SIDEBAR === */
.stb-widget { margin-bottom: 32px; }
.stb-widget-title {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding-bottom: 12px;
    margin-bottom: 16px;
    border-bottom: 2px solid var(--color-text);
}

/* Tabs */
.stb-tab-nav {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 16px;
}
.stb-tab-nav li { margin-right: 0; }
.stb-tab-nav a {
    display: block;
    padding: 8px 16px;
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}
.stb-tab-nav a.stb-tab-active,
.stb-tab-nav a:hover {
    color: var(--color-text);
    border-bottom-color: var(--color-primary);
}
.stb-tab-content { display: none; }
.stb-tab-content.stb-tab-active { display: block; }

/* Tab posts */
.stb-tab-post {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
}
.stb-tab-post:last-child { border-bottom: none; }
.stb-tab-post-thumb {
    width: 94px;
    height: 70px;
    flex-shrink: 0;
    overflow: hidden;
    line-height: 0;
}
.stb-tab-post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.stb-tab-post-body { flex: 1; min-width: 0; }
.stb-tab-post-meta {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}
.stb-tab-cat { color: var(--color-primary); }
.stb-tab-post-title {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 700;
    line-height: 1.3;
}
.stb-tab-post-title a:hover { color: var(--color-primary); }

/* Category list */
.stb-cat-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9375rem;
}
.stb-cat-list li:last-child { border-bottom: none; }
.stb-cat-count { font-size: 0.8125rem; color: var(--color-text-secondary); }

/* === BREADCRUMBS === */
.stb-breadcrumbs {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    padding: 12px 0;
}
.stb-breadcrumbs a { color: var(--color-text-secondary); }
.stb-breadcrumbs a:hover { color: var(--color-primary); }
.stb-sep { margin: 0 6px; }

/* === ARCHIVE HEADER === */
.stb-archive-header {
    background: var(--color-surface);
    padding: 8px 0;
    margin-bottom: 5px;
}
.stb-archive-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.stb-archive-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

/* === ARTICLE (single post) === */
.stb-article-header { margin-bottom: 24px; }
.stb-article-header .stb-badge { margin-bottom: 12px; }
.stb-article-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}
.stb-article-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    flex-wrap: wrap;
}
.stb-article-meta .stb-avatar { border-radius: 50%; margin-right: 4px; }
.stb-article-featured { margin-bottom: 24px; }
.stb-article-featured img { width: 100%; height: auto; }
.stb-article-content {
    font-size: 1.0625rem;
    line-height: 1.75;
}
.stb-article-content h2,
.stb-article-content h3,
.stb-article-content h4 {
    font-family: var(--font-heading);
    margin-top: 32px;
    margin-bottom: 16px;
}
.stb-article-content h2 { font-size: 1.5rem; }
.stb-article-content h3 { font-size: 1.25rem; }
.stb-article-content p { margin-bottom: 16px; }
.stb-article-content img { margin: 16px 0; }
.stb-article-content ul, .stb-article-content ol {
    margin: 16px 0;
    padding-left: 24px;
    list-style: revert;
}
.stb-article-content blockquote {
    border-left: 3px solid var(--color-primary);
    padding: 16px 24px;
    margin: 24px 0;
    font-style: italic;
    color: var(--color-text-secondary);
}
.stb-article-footer { margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--color-border); }
.stb-article-tags { font-size: 0.875rem; }
.stb-article-tags span { font-weight: 700; margin-right: 8px; }
.stb-article-tags a {
    display: inline-block;
    padding: 4px 10px;
    margin: 4px 4px 4px 0;
    background: var(--color-surface);
    font-size: 0.8125rem;
}
.stb-article-tags a:hover { background: var(--color-primary); color: #fff; }

/* === TOC === */
.stb-toc {
    background: var(--color-surface);
    padding: 20px 24px;
    margin-bottom: 24px;
    border-left: 3px solid var(--color-primary);
}
.stb-toc-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.stb-toc-list {
    margin-top: 12px;
    padding-left: 20px;
    list-style: decimal;
}
.stb-toc-list li {
    padding: 4px 0;
    font-size: 0.9375rem;
    list-style: decimal;
}
.stb-toc-list a { color: var(--color-text-secondary); }
.stb-toc-list a:hover { color: var(--color-primary); }

/* === RELATED POSTS === */
.stb-related { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--color-border); }

/* === PAGINATION === */
.stb-pagination { margin-top: 32px; text-align: center; }
.stb-pagination .nav-links { display: flex; justify-content: center; gap: 4px; }
.stb-pagination .page-numbers {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 12px;
    border: 1px solid var(--color-border);
    font-size: 0.875rem;
}
.stb-pagination .page-numbers.current {
    background: var(--color-text);
    color: #fff;
    border-color: var(--color-text);
}

/* === CONTACT FORM === */
.stb-contact-form { max-width: 600px; }
.stb-form-group { margin-bottom: 16px; }
.stb-form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
}
.stb-form-group input,
.stb-form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    transition: border-color 0.2s;
}
.stb-form-group input:focus,
.stb-form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}
.stb-submit-btn {
    display: inline-block;
    padding: 12px 32px;
    background: var(--color-text);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}
.stb-submit-btn:hover { background: var(--color-primary); }
.stb-form-status { margin-top: 12px; font-size: 0.875rem; }

/* === 404 PAGE === */
.stb-404-content { text-align: center; padding: 64px 0; }
.stb-404-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    margin-bottom: 16px;
}
.stb-404-text {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

/* === NO RESULTS === */
.stb-no-results { text-align: center; padding: 48px 0; }
.stb-no-results h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.stb-no-results p { color: var(--color-text-secondary); margin-bottom: 24px; }

/* === SEARCH OVERLAY === */
.stb-search-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.9);
    justify-content: center;
    align-items: center;
}
.stb-search-overlay.active { display: flex; }
.stb-search-overlay form {
    display: flex;
    width: 90%;
    max-width: 600px;
}
.stb-search-overlay input {
    flex: 1;
    padding: 14px 20px;
    font-size: 1.125rem;
    border: none;
    border-bottom: 2px solid #fff;
    background: transparent;
    color: #fff;
    outline: none;
}
.stb-search-overlay input::placeholder { color: rgba(255,255,255,0.5); }
.stb-search-overlay button[type="submit"] {
    padding: 14px 24px;
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.875rem;
    border: none;
}
.stb-search-close {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 2rem;
    color: #fff;
    background: none;
    border: none;
    cursor: pointer;
}

/* === BACK TO TOP === */
.stb-back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: var(--color-text);
    color: #fff;
    font-size: 1.25rem;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    transition: background 0.2s;
}
.stb-back-to-top.visible { display: flex; }
.stb-back-to-top:hover { background: var(--color-primary); }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .stb-layout { flex-direction: column; }
    .stb-sidebar { width: 100%; }
    .stb-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .stb-grid-2 { grid-template-columns: 1fr; }
    .stb-grid-3 { grid-template-columns: 1fr; }
    .stb-grid-4 { grid-template-columns: 1fr; }
    .stb-list-post { flex-direction: column; }
    .stb-list-post-thumb { width: 100%; }
    .stb-horizontal-post { flex-direction: column; }
    .stb-horizontal-post-thumb { width: 100%; }
    .stb-article-title { font-size: 1.75rem; }
    .stb-list-post-title { font-size: 1.25rem; }
}