/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
}
h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }
p { margin-bottom: 1rem; }
button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    border: none;
}

/* === CONTAINER === */
.stb-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* === LAYOUT: Main + Sidebar === */
.stb-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 32px;
    align-items: start;
}
.stb-main { min-width: 0; }
.stb-sidebar { min-width: 0; position: static; }

/* === 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; }

/* === HEADER === */
.stb-header {
    background: var(--color-header-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.stb-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 24px;
}
.stb-logo a { display: flex; align-items: center; gap: 8px; }
.stb-logo img.custom-logo { max-height: 48px; width: auto; }
.stb-logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.375rem;
    color: var(--color-text);
    white-space: nowrap;
}

/* === NAV === */
.stb-nav { display: flex; align-items: center; }
.stb-nav-list {
    display: flex;
    gap: 4px;
}
.stb-nav-list li { position: relative; }
.stb-nav-list li a {
    display: block;
    padding: 8px 14px;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    transition: color 0.2s;
}
.stb-nav-list li a:hover,
.stb-nav-list li.current-menu-item > a {
    color: var(--color-primary);
}
.stb-nav-list li ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    min-width: 200px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    z-index: 50;
}
.stb-nav-list li:hover > ul,
.stb-nav-list li:focus-within > ul { display: block; }
.stb-nav-list li ul li a {
    padding: 10px 16px;
    font-weight: 500;
    font-size: 0.8125rem;
}
.stb-nav-list li ul li a:hover { background: var(--color-bg); }

/* === HEADER RIGHT === */
.stb-header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}
.stb-header-social {
    display: flex;
    gap: 8px;
}
.stb-header-social a {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    transition: color 0.2s;
}
.stb-header-social a:hover { color: var(--color-primary); }

.stb-search-toggle {
    background: none;
    cursor: pointer;
    color: var(--color-text);
    font-size: 1rem;
    padding: 4px;
}
.stb-hamburger {
    display: none;
    background: none;
    cursor: pointer;
    padding: 4px;
    flex-direction: column;
    gap: 5px;
}
.stb-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s;
}
.stb-hamburger.active span:nth-child(1) { transform: rotate(45deg) translateY(7px); }
.stb-hamburger.active span:nth-child(2) { opacity: 0; }
.stb-hamburger.active span:nth-child(3) { transform: rotate(-45deg) translateY(-7px); }

/* === SEARCH OVERLAY === */
.stb-search-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 200;
    align-items: center;
    justify-content: center;
}
.stb-search-overlay.active { display: flex; }
.stb-search-overlay form {
    width: 90%;
    max-width: 600px;
    display: flex;
}
.stb-search-overlay input[type="search"] {
    flex: 1;
    padding: 16px 24px;
    font-size: 1.125rem;
    border-radius: var(--radius) 0 0 var(--radius);
    background: var(--color-surface);
}
.stb-search-overlay button {
    padding: 16px 24px;
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
    border-radius: 0 var(--radius) var(--radius) 0;
    font-weight: 600;
}
.stb-search-close {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
}

/* === CARDS === */
.stb-card {
    background: var(--color-card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}
.stb-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.stb-card-thumb {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
}
.stb-card-thumb img {
    width: 100%;
    aspect-ratio: 370/250;
    object-fit: cover;
    transition: transform 0.3s;
}
.stb-card:hover .stb-card-thumb img { transform: scale(1.03); }

.stb-card-badge {
    position: absolute;
    bottom: 12px;
    left: 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    z-index: 2;
}
.stb-badge-cat {
    display: inline-block;
    padding: 4px 10px;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    letter-spacing: 0.03em;
    transition: text-decoration 0.2s;
}
.stb-badge-cat:hover {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 2px;
}
.stb-badge-time {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    font-size: 0.6875rem;
    border-radius: var(--radius-sm);
}

.stb-card-body { padding: 16px 4px; }
.stb-card-title {
    font-size: 1.0625rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
}
.stb-card-title a:hover { color: var(--color-primary); }
.stb-card-excerpt {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.stb-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}
.stb-card-meta-author {
    display: flex;
    align-items: center;
    gap: 6px;
}
.stb-card-meta-author img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}
.stb-card-meta-date {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* === CARD SMALL (4-col) === */
.stb-card-small .stb-card-thumb img { aspect-ratio: 280/190; }
.stb-card-small .stb-card-body { padding: 12px 0; }
.stb-card-small .stb-card-title { font-size: 0.9375rem; margin-bottom: 4px; }
.stb-card-small .stb-card-meta { font-size: 0.6875rem; }

/* === BOOKMARK ICON === */
.stb-bookmark {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.4);
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    z-index: 2;
    transition: background 0.2s;
    font-size: 0.75rem;
}
.stb-bookmark:hover { background: var(--color-primary); }

/* === SECTION HEADERS === */
.stb-section { padding: 40px 0; }
.stb-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}
.stb-section-title {
    font-size: 1.25rem;
    font-weight: 700;
    position: relative;
    padding-left: 12px;
}
.stb-section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 2px;
}
.stb-section-filter {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8125rem;
    font-weight: 500;
}
.stb-section-filter a {
    padding: 4px 8px;
    color: var(--color-text-secondary);
    transition: color 0.2s;
}
.stb-section-filter a.active,
.stb-section-filter a:hover { color: var(--color-text); font-weight: 600; }
.stb-section-filter .stb-filter-sep { color: var(--color-text-light); }
.stb-section-link {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.2s;
}
.stb-section-link:hover { color: var(--color-primary); }

/* === LOAD MORE BUTTON === */
.stb-load-more {
    display: flex;
    justify-content: center;
    margin-top: 32px;
}
.stb-load-more a,
.stb-load-more button {
    display: inline-block;
    padding: 10px 28px;
    border: 2px solid var(--color-border);
    border-radius: 24px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-surface);
    cursor: pointer;
    transition: all 0.2s;
}
.stb-load-more a:hover,
.stb-load-more button:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* === PAGINATION === */
.stb-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}
.stb-pagination a,
.stb-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 2px solid var(--color-border);
    border-radius: 24px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    transition: all 0.2s;
}
.stb-pagination a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.stb-pagination .current {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* === SIDEBAR === */
.stb-widget { margin-bottom: 32px; }
.stb-widget-title {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-border);
}

/* Sidebar tabs */
.stb-tabs { margin-bottom: 24px; }
.stb-tab-nav {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 16px;
}
.stb-tab-nav li a {
    display: block;
    padding: 8px 20px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}
.stb-tab-nav li a.stb-tab-active,
.stb-tab-nav li 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; }

.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 {
    flex-shrink: 0;
    width: 94px;
    height: 70px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.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: 0.6875rem;
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}
.stb-tab-post-meta .stb-tab-cat { color: var(--color-primary); font-weight: 600; }
.stb-tab-post-title {
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Sidebar categories */
.stb-cat-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.875rem;
}
.stb-cat-list li:last-child { border-bottom: none; }
.stb-cat-list li a { font-weight: 500; }
.stb-cat-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 6px;
    background: var(--color-badge-count);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
}

/* === FOOTER === */
.stb-footer {
    background: var(--color-footer-bg);
    color: var(--color-footer-text);
    text-align: center;
    padding: 48px 24px 24px;
}
.stb-footer-logo {
    margin-bottom: 8px;
}
.stb-footer-logo a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
}
.stb-footer-logo img { max-height: 48px; margin: 0 auto; }
.stb-footer-tagline {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
}
.stb-footer-social {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
}
.stb-footer-social a {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #fff;
    font-size: 0.875rem;
    transition: opacity 0.2s;
}
.stb-footer-social a:hover { opacity: 0.8; }
.stb-footer-social .stb-social-fb { background: #3b5998; }
.stb-footer-social .stb-social-tw { background: #1da1f2; }
.stb-footer-social .stb-social-pin { background: #bd081c; }
.stb-footer-social .stb-social-ig { background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888); }
.stb-footer-social .stb-social-yt { background: #ff0000; }

.stb-footer-copy {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
}
.stb-footer-copy a { color: var(--color-primary); }

/* === BREADCRUMBS === */
.stb-breadcrumbs-bar {
    background: var(--color-bg);
    padding: 12px 0;
    margin-bottom: 5px;
    font-size: 0.8125rem;
}
.stb-breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
    color: var(--color-text-secondary);
}
.stb-breadcrumbs a { color: var(--color-text-secondary); }
.stb-breadcrumbs a:hover { color: var(--color-primary); }
.stb-breadcrumbs .stb-sep { margin: 0 4px; }

/* === ARCHIVE HEADER === */
.stb-archive-header {
    background: linear-gradient(135deg, var(--color-footer-bg) 0%, #2d2d4e 100%);
    padding: 14px 0;
    margin-bottom: 24px;
}
.stb-archive-header .stb-container {
    display: flex;
    align-items: center;
    gap: 16px;
}
.stb-archive-header h1 {
    color: #ffffff;
    font-size: 1.125rem;
    margin: 0;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}
.stb-archive-header .stb-breadcrumbs {
    color: rgba(255,255,255,0.5);
    font-size: 0.75rem;
    margin-left: auto;
}
.stb-archive-header .stb-breadcrumbs a { color: rgba(255,255,255,0.5); }
.stb-archive-header .stb-breadcrumbs a:hover { color: rgba(255,255,255,0.8); }
.stb-archive-header p { display: none; }
@media (max-width: 768px) {
    .stb-archive-header .stb-container { flex-direction: column; align-items: flex-start; gap: 4px; }
    .stb-archive-header .stb-breadcrumbs { margin-left: 0; }
}

/* === ARTICLE (single) === */
.stb-article { background: var(--color-surface); }
.stb-article-header { margin-bottom: 24px; }
.stb-article-header .stb-badge-cat { margin-bottom: 12px; }
.stb-article-header h1 { font-size: 1.75rem; margin-bottom: 12px; }
.stb-article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    flex-wrap: wrap;
}
.stb-article-meta-author {
    display: flex;
    align-items: center;
    gap: 8px;
}
.stb-article-meta-author img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}
.stb-article-featured {
    margin-bottom: 24px;
    border-radius: var(--radius);
    overflow: hidden;
}
.stb-article-featured img { width: 100%; }

.stb-article-content {
    font-size: 1rem;
    line-height: 1.8;
    padding: 24px 0;
}
.stb-article-content h2 { font-size: 1.375rem; margin: 32px 0 16px; }
.stb-article-content h3 { font-size: 1.125rem; margin: 24px 0 12px; }
.stb-article-content p { margin-bottom: 1.25rem; }
.stb-article-content img {
    border-radius: var(--radius);
    margin: 16px 0;
}
.stb-article-content ul,
.stb-article-content ol {
    margin: 0 0 1.25rem 1.5rem;
    list-style: disc;
}
.stb-article-content ol { list-style: decimal; }
.stb-article-content li { margin-bottom: 0.5rem; }
.stb-article-content blockquote {
    border-left: 4px solid var(--color-primary);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--color-bg);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
}

.stb-article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
}
.stb-article-tags a {
    padding: 4px 12px;
    background: var(--color-bg);
    border-radius: 24px;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}
.stb-article-tags a:hover { background: var(--color-primary); color: #fff; }

/* === AUTHOR BOX === */
.stb-author-box {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--color-bg);
    border-radius: var(--radius);
    margin: 32px 0;
}
.stb-author-box img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}
.stb-author-box h4 { margin-bottom: 8px; }
.stb-author-box p { font-size: 0.875rem; color: var(--color-text-secondary); margin: 0; }

/* === RELATED POSTS === */
.stb-related { padding: 40px 0; }
.stb-related h3 {
    font-size: 1.25rem;
    margin-bottom: 24px;
    padding-left: 12px;
    position: relative;
}
.stb-related h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 2px;
}

/* === TOC === */
.stb-toc {
    background: var(--color-bg);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 24px;
}
.stb-toc-title {
    font-size: 0.9375rem;
    font-weight: 700;
    margin-bottom: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.stb-toc-list { padding-left: 16px; }
.stb-toc-list li { margin-bottom: 8px; }
.stb-toc-list li a {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}
.stb-toc-list li a:hover { color: var(--color-primary); }

/* === CONTACT FORM === */
.stb-contact-form { max-width: 600px; margin: 0 auto; }
.stb-form-group { margin-bottom: 20px; }
.stb-form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 8px;
}
.stb-form-group input,
.stb-form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    transition: border-color 0.2s;
    background: var(--color-surface);
}
.stb-form-group input:focus,
.stb-form-group textarea:focus { border-color: var(--color-primary); }
.stb-form-group textarea { resize: vertical; min-height: 140px; }
.stb-form-submit {
    display: inline-block;
    padding: 12px 32px;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s;
}
.stb-form-submit:hover { background: var(--color-primary-hover); }
.stb-form-message {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
}
.stb-form-message.success { background: #d4edda; color: #155724; }
.stb-form-message.error { background: #f8d7da; color: #721c24; }

/* === BACK TO TOP === */
.stb-back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 90;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    transition: background 0.2s;
    font-size: 1.25rem;
}
.stb-back-to-top.visible { display: flex; }
.stb-back-to-top:hover { background: var(--color-primary-hover); }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .stb-layout { grid-template-columns: 1fr; }
    .stb-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .stb-header-social { display: none; }
}
@media (max-width: 768px) {
    .stb-nav { display: none; }
    .stb-nav.active {
        display: block;
        position: fixed;
        inset: 64px 0 0 0;
        background: var(--color-surface);
        z-index: 99;
        overflow-y: auto;
        padding: 16px;
    }
    .stb-nav.active .stb-nav-list {
        flex-direction: column;
        gap: 0;
    }
    .stb-nav.active .stb-nav-list li a { padding: 12px 16px; }
    .stb-nav.active .stb-nav-list li ul {
        display: block;
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 16px;
    }
    .stb-hamburger { display: flex; }
    .stb-grid-2 { grid-template-columns: 1fr; }
    h1 { font-size: 1.375rem; }
    h2 { font-size: 1.25rem; }
    .stb-section { padding: 24px 0; }
    .stb-container { padding: 0 16px; }
    .stb-author-box { flex-direction: column; align-items: center; text-align: center; }
}
@media (max-width: 480px) {
    .stb-grid-4 { grid-template-columns: 1fr; }
    .stb-section-header { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 360px) {
    .stb-container { padding: 0 12px; }
    h1 { font-size: 1.25rem; }
    .stb-card-title { font-size: 0.9375rem; }
    .stb-hero-overlay h2 { font-size: 1rem; }
    .stb-tab-nav li a { padding: 8px 12px; font-size: 0.8125rem; }
}