:root {
    --bg-primary: #0f172a;
    --bg-secondary: #111827;
    --surface: #1f2937;
    --surface-soft: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --accent: #3b82f6;
    --accent-soft: #2563eb;
    --border: rgba(148, 163, 184, 0.28);
    --max-width: 1140px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Inter", sans-serif;
    background: linear-gradient(160deg, var(--bg-primary), var(--bg-secondary));
    color: var(--text-primary);
    line-height: 1.6;
    transition: opacity 0.22s ease, transform 0.22s ease;
}

body.page-exit {
    opacity: 0;
    transform: translateY(8px);
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
    background: rgba(15, 23, 42, 0.85);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.9rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.top-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tab-link {
    text-decoration: none;
    font-size: 0.95rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    transition: all 0.2s ease;
}

.tab-link:hover {
    color: var(--text-primary);
    border-color: rgba(59, 130, 246, 0.7);
}

.tab-link.active {
    color: white;
    background: linear-gradient(135deg, var(--accent), var(--accent-soft));
    border-color: transparent;
}

.hero {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 3.5rem 1rem 2rem;
}

.hero h1 {
    margin: 0 0 0.75rem;
    font-size: clamp(1.9rem, 2.8vw, 2.5rem);
    line-height: 1.2;
}

.hero p {
    margin: 0;
    color: var(--text-secondary);
    max-width: 760px;
}

.blog-main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem 3rem;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.blog-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
    background: rgba(31, 41, 55, 0.7);
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.blog-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.tag {
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.2rem 0.55rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.blog-card h2 {
    margin: 0;
    font-size: 1.08rem;
}

.blog-card p {
    margin: 0;
    color: var(--text-secondary);
}

.blog-actions {
    margin-top: auto;
    display: flex;
    gap: 0.6rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    border-radius: 10px;
    border: 1px solid var(--border);
    padding: 0.45rem 0.7rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-soft));
    border-color: transparent;
}

.btn:hover {
    transform: translateY(-1px);
}

.site-footer {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.9rem;
}

.page-transition-layer {
    position: fixed;
    inset: 0;
    background: linear-gradient(145deg, rgba(6, 11, 24, 0.82), rgba(18, 34, 63, 0.82));
    backdrop-filter: blur(6px);
    opacity: 0;
    pointer-events: none;
    z-index: 99999;
    transition: opacity 0.22s ease;
}

.page-transition-layer.active {
    opacity: 1;
}

@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .blog-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}