/* ==================== TUTORIAL DETAIL PAGE ==================== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main, 'Roboto', sans-serif);
    background-color: var(--color-light-bg, #f4f6f8);
    color: var(--color-text-main, #333333);
    line-height: 1.7;
}
a { text-decoration: none; }

/* ==================== NAVBAR + HEADER ==================== */
.navbar {
    background-color: var(--color-dark-bg, #1a1a2e);
    padding: 15px 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: center;
    border-bottom: 1px solid rgba(0, 230, 118, 0.2);
}
.nav-links {
    display: flex;
    gap: 20px;
    list-style: none;
}
.nav-links a {
    color: var(--color-text-light, #a0aab2);
    font-family: var(--font-code, 'Space Mono', monospace);
    font-size: 15px;
    font-weight: bold;
    transition: color 0.3s;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary, #00e676);
}

.site-header {
    background-color: var(--color-dark-bg, #1a1a2e);
    color: #fff;
    text-align: center;
    padding: 36px 20px 44px;
    border-bottom: 4px solid var(--color-primary, #00e676);
}
.logo {
    font-family: var(--font-code, 'Space Mono', monospace);
    font-size: 34px;
    font-weight: 700;
    margin-bottom: 10px;
}
.logo span { color: var(--color-primary, #00e676); }
.tagline {
    color: var(--color-text-light, #a0aab2);
    font-size: 15px;
    max-width: 780px;
    margin: 0 auto;
}

/* ==================== ARTICLE LAYOUT ==================== */
.page-wrap {
    max-width: 1180px;
    margin: 0 auto;
    padding: 30px 20px 50px;
}
.breadcrumb {
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--color-text-muted, #636e72);
}
.breadcrumb a {
    color: #0984e3;
    font-weight: 500;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
}

.article-card {
    background: #fff;
    border: 1px solid #e1e4e8;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.04);
    overflow: hidden;
}
.article-hero {
    height: 300px;
    background-color: #2d3436;
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid #e1e4e8;
}
.article-header {
    padding: 24px;
    border-bottom: 1px dashed #dfe6e9;
}
.article-category {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--color-tip, #00b894);
    margin-bottom: 10px;
}
.article-title {
    font-size: 32px;
    line-height: 1.35;
    color: var(--color-text-title, #2d3436);
    margin-bottom: 14px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    color: var(--color-text-muted, #636e72);
    font-size: 14px;
}

.article-body {
    padding: 24px;
}
.article-body p {
    margin-bottom: 16px;
}
.article-body h2 {
    margin: 34px 0 12px;
    font-size: 24px;
    color: var(--color-dark-bg, #1a1a2e);
    font-family: var(--font-code, 'Space Mono', monospace);
}
.article-body h3 {
    margin: 22px 0 10px;
    font-size: 18px;
    color: var(--color-text-title, #2d3436);
}
.article-body ul,
.article-body ol {
    margin: 0 0 18px 20px;
}
.article-body li {
    margin-bottom: 8px;
}

.callout {
    border-left: 4px solid var(--color-primary, #00e676);
    background: #f7fdf9;
    padding: 14px 16px;
    margin: 20px 0;
    border-radius: 6px;
}

.code-block {
    background: #0f1720;
    color: #d7e1ec;
    border-radius: 8px;
    padding: 16px;
    overflow-x: auto;
    font-family: var(--font-code, 'Space Mono', monospace);
    font-size: 13px;
    line-height: 1.65;
    margin: 16px 0;
}

.article-tags {
    margin-top: 26px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.article-tags span {
    background: #edf2f7;
    color: #2d3436;
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
}

.author-box {
    margin-top: 24px;
    border-top: 1px dashed #dfe6e9;
    padding-top: 20px;
    display: flex;
    gap: 14px;
    align-items: center;
}
.author-avatar {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: var(--color-dark-bg, #1a1a2e);
    color: var(--color-primary, #00e676);
    font-family: var(--font-code, 'Space Mono', monospace);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.author-name {
    font-weight: 700;
    color: var(--color-text-title, #2d3436);
}
.author-bio {
    font-size: 14px;
    color: var(--color-text-muted, #636e72);
}

/* ==================== SIDEBAR ==================== */
.sidebar-card {
    background: #fff;
    border: 1px solid #e1e4e8;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.04);
    padding: 18px;
    margin-bottom: 16px;
}
.sidebar-title {
    font-family: var(--font-code, 'Space Mono', monospace);
    font-size: 16px;
    color: var(--color-dark-bg, #1a1a2e);
    margin-bottom: 12px;
}
.toc-list {
    list-style: none;
}
.toc-list li {
    margin-bottom: 10px;
}
.toc-list a {
    color: #0984e3;
    font-size: 14px;
}
.toc-list a:hover {
    text-decoration: underline;
}
.quick-link {
    display: block;
    color: var(--color-text-main, #333333);
    font-size: 14px;
    padding: 8px 0;
    border-bottom: 1px dashed #dfe6e9;
}
.quick-link:last-child {
    border-bottom: none;
}

/* ==================== FOOTER ==================== */
.footer {
    margin-top: 40px;
    background: var(--color-dark-bg, #1a1a2e);
    color: var(--color-text-light, #a0aab2);
    text-align: center;
    padding: 30px 20px;
    font-family: var(--font-code, 'Space Mono', monospace);
    font-size: 14px;
}
.footer a { color: var(--color-primary, #00e676); }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 992px) {
    .article-layout {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }
    .page-wrap {
        padding: 20px 12px 40px;
    }
    .article-header,
    .article-body {
        padding: 18px;
    }
    .article-title {
        font-size: 26px;
    }
    .article-hero {
        height: 220px;
    }
}
.dummy-ad-wrapper {
    background-color: rgba(0,0,0,0.02);
    border: 1px dashed #ccc;
    margin: 30px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border-radius: 4px;
}

.dummy-ad-content {
    width: 100%;
    height: 100%;
    background-color: #0d0d15;
    border: 2px solid var(--color-primary, #00e676);
    color: var(--color-primary, #00e676);
    font-family: var(--font-code, monospace);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 15px;
    text-align: center;
    box-shadow: inset 0 0 20px rgba(0, 230, 118, 0.2);
}
.ad-meta { font-size: 10px; opacity: 0.6; margin-bottom: 10px; }
.ad-title { font-size: 18px; font-weight: bold; line-height: 1.3; margin-bottom: 10px; }
.ad-cta-fake {
    background-color: var(--color-primary, #00e676);
    color: var(--color-dark-bg, #1a1a2e);
    padding: 5px 15px;
    font-size: 13px;
    font-weight: bold;
    border-radius: 4px;
    margin-top: 10px;
}

.ad-in-article { min-height: 250px; }
.ad-bottom { min-height: 90px; }
.ad-sidebar { 
    width: 100%;
    height: 600px; 
    margin-top: 30px; 
    position: -webkit-sticky;
    position: sticky; 
    top: 96px;
}

@media (max-width: 992px) {
    .ad-sidebar {
        position: static;
        height: auto;
        min-height: 320px;
    }
}