*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --accent: #E8630C;
    --accent-hover: #CC4E00;
    --accent-light: rgba(232,99,12,0.1);
    --dark: #0F0F1A;
    --mid: #1A1A2E;
    --card: #16162A;
    --light: #F4F6FA;
    --text: #E8EAF0;
    --muted: #9CA3B4;
    --success: #22C55E;
    --border: rgba(255,255,255,0.06);
    --radius: 12px;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--dark);
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
img { max-width: 100%; height: auto; border-radius: var(--radius); }

/* NAV */
.nav {
    background: var(--mid);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.nav-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--text);
    text-decoration: none;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
    color: var(--muted);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-burger { display: none; background: none; border: none; color: var(--text); font-size: 24px; cursor: pointer; }

/* HERO */
.hero {
    background: linear-gradient(135deg, var(--dark) 0%, #1A0D00 50%, #0F0F1A 100%);
    padding: 64px 0 48px;
    text-align: center;
}
.hero h1 { font-size: clamp(28px, 4vw, 48px); font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 auto; }
.hero-small { padding: 40px 0 32px; }
.hero-small h1 { font-size: clamp(24px, 3.5vw, 36px); }

/* CARDS */
.cards-section { padding: 64px 0; }
.cards-section h2 { font-size: 28px; margin-bottom: 8px; }
.section-desc { color: var(--muted); margin-bottom: 32px; }
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: transform 0.2s, border-color 0.2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-niche {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 10px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; line-height: 1.3; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); }
.card p { color: var(--muted); font-size: 15px; margin-bottom: 16px; }
.card-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ARTICLE */
.article-wrap { padding: 48px 0 80px; }
.article-meta {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
}
.article-badge {
    background: var(--accent-light);
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 6px 14px;
    border-radius: 20px;
}
.article-content {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(24px, 4vw, 48px);
    max-width: 800px;
    margin: 0 auto;
}
.article-content h1 { font-size: 32px; margin-bottom: 24px; line-height: 1.3; }
.article-content h2 {
    font-size: 24px;
    margin-top: 40px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-content h3 { font-size: 20px; margin-top: 32px; margin-bottom: 12px; }
.article-content h4 { font-size: 17px; margin-top: 24px; margin-bottom: 8px; color: var(--accent); }
.article-content p { margin-bottom: 16px; color: var(--text); }
.article-content ul, .article-content ol {
    margin-bottom: 16px;
    padding-left: 24px;
}
.article-content li { margin-bottom: 8px; color: var(--text); }
.article-content strong { color: #fff; }
.article-content blockquote {
    border-left: 4px solid var(--accent);
    padding: 16px 20px;
    margin: 24px 0;
    background: var(--accent-light);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--muted);
    font-style: italic;
}
.article-content pre {
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    overflow-x: auto;
    margin: 24px 0;
}
.article-content code {
    background: var(--dark);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
}
.article-content pre code { background: none; padding: 0; }
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    background: var(--dark);
    border-radius: var(--radius);
    overflow: hidden;
}
.article-content th {
    background: var(--accent-light);
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .5px;
}
.article-content td {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    font-size: 15px;
}
.article-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 32px 0;
}
.article-content img {
    border-radius: var(--radius);
    margin: 16px 0;
}

/* ARTICLE NAV */
.article-nav {
    max-width: 800px;
    margin: 32px auto 0;
    display: flex;
    justify-content: space-between;
    gap: 16px;
}
.article-nav a {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    color: var(--text);
    font-size: 14px;
    flex: 1;
    transition: border-color 0.2s;
}
.article-nav a:hover { border-color: var(--accent); color: var(--accent); }
.article-nav .nav-label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; display: block; }
.article-nav .nav-next { text-align: right; }

/* BREADCRUMBS */
.breadcrumbs {
    max-width: 800px;
    margin: 0 auto 16px;
    font-size: 14px;
    color: var(--muted);
}
.breadcrumbs a { color: var(--muted); }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs span { margin: 0 8px; }

/* NICHE HEADER */
.niche-header {
    text-align: center;
    padding: 48px 0 32px;
}
.niche-header .icon { font-size: 48px; margin-bottom: 12px; }
.niche-header h1 { font-size: 36px; margin-bottom: 12px; }
.niche-header p { color: var(--muted); font-size: 17px; max-width: 560px; margin: 0 auto; }

/* FOOTER */
footer {
    margin-top: auto;
    background: var(--mid);
    border-top: 1px solid var(--border);
    padding: 32px 0;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
footer p { font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); }
footer a:hover { color: var(--accent); }

/* BACK TO TOP */
.back-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--accent);
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    text-decoration: none;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 90;
}
.back-top.visible { opacity: 1; }

/* RESPONSIVE */
@media (max-width: 700px) {
    .nav-links { display: none; }
    .nav-burger { display: block; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--mid);
        padding: 16px 20px;
        border-bottom: 1px solid var(--border);
    }
    .cards-grid { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; text-align: center; }
    .article-nav { flex-direction: column; }
}

/* TOC for article */
.toc {
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 32px;
}
.toc-title {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 12px;
}
.toc ul { list-style: none; padding: 0; }
.toc li { margin-bottom: 6px; }
.toc a { color: var(--muted); font-size: 14px; }
.toc a:hover { color: var(--accent); }