/* ============ ИИсчёт — БЛОГ. Общие стили, единые с лендингом ============ */
:root {
    --c-bg: #0A0A0F;
    --c-bg-2: #111118;
    --c-bg-3: #1A1A24;
    --c-surface: #1E1E2A;
    --c-surface-hover: #26263A;
    --c-border: rgba(255,255,255,0.06);
    --c-border-light: rgba(255,255,255,0.1);
    --c-text: #F0EFF4;
    --c-text-dim: #9896A8;
    --c-text-dimmer: #6B6980;
    --c-accent: #3BF5A0;
    --c-accent-dim: rgba(59,245,160,0.15);
    --c-accent-glow: rgba(59,245,160,0.3);
    --c-orange: #FF8A50;
    --c-orange-dim: rgba(255,138,80,0.15);
    --c-red: #FF5A6E;
    --c-red-dim: rgba(255,90,110,0.12);
    --c-blue: #5B8AFF;
    --c-blue-dim: rgba(91,138,255,0.15);
    --font-display: 'Unbounded', sans-serif;
    --font-body: 'Onest', sans-serif;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--c-bg);
    color: var(--c-text);
    font-size: 17px;
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.container-narrow { max-width: 760px; margin: 0 auto; padding: 0 32px; }
.accent { color: var(--c-accent); }
.orange { color: var(--c-orange); }
a { color: var(--c-accent); }

/* ============ NOISE OVERLAY ============ */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
}

/* ============ NAV ============ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav.scrolled {
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border-bottom: 1px solid var(--c-border);
    padding: 14px 0;
}
.nav-inner { display: flex; justify-content: space-between; align-items: center; }
.logo {
    font-family: var(--font-display);
    font-size: 22px; font-weight: 800;
    color: var(--c-text); text-decoration: none; letter-spacing: -0.5px;
}
.logo span { color: var(--c-accent); }
.nav-links { display: flex; gap: 36px; list-style: none; align-items: center; }
.nav-links a { color: var(--c-text-dim); text-decoration: none; font-size: 14px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--c-text); }
.nav-cta {
    font-family: var(--font-body); font-size: 14px; font-weight: 600;
    color: var(--c-bg); background: var(--c-accent);
    border: none; padding: 10px 24px; border-radius: 100px;
    cursor: pointer; text-decoration: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 24px var(--c-accent-glow); }

/* ============ BUTTONS ============ */
.btn-primary {
    font-family: var(--font-body); font-size: 16px; font-weight: 600;
    color: var(--c-bg); background: var(--c-accent);
    border: none; padding: 16px 36px; border-radius: 100px;
    cursor: pointer; text-decoration: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px var(--c-accent-glow); }
.btn-primary svg { transition: transform 0.3s; }
.btn-primary:hover svg { transform: translateX(3px); }
.btn-secondary {
    font-family: var(--font-body); font-size: 16px; font-weight: 500;
    color: var(--c-text-dim); background: transparent;
    border: 1px solid var(--c-border-light);
    padding: 16px 32px; border-radius: 100px;
    cursor: pointer; text-decoration: none; transition: all 0.3s;
    display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { color: var(--c-text); border-color: rgba(255,255,255,0.25); background: rgba(255,255,255,0.03); }

/* ============ BLOG HEADER / HERO ============ */
.blog-head { padding: 160px 0 40px; position: relative; overflow: hidden; }
.blog-head-glow {
    position: absolute; width: 600px; height: 600px; border-radius: 50%;
    filter: blur(150px); opacity: 0.12; background: var(--c-accent);
    top: -260px; right: -120px; pointer-events: none;
}
.breadcrumbs { font-size: 13px; color: var(--c-text-dimmer); margin-bottom: 22px; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.breadcrumbs a { color: var(--c-text-dim); text-decoration: none; }
.breadcrumbs a:hover { color: var(--c-text); }
.breadcrumbs span { color: var(--c-text-dimmer); }
.section-label {
    font-family: var(--font-display); font-size: 11px; font-weight: 700;
    letter-spacing: 3px; text-transform: uppercase; color: var(--c-accent);
    margin-bottom: 20px; display: flex; align-items: center; gap: 12px;
}
.section-label::before { content: ''; width: 24px; height: 1px; background: var(--c-accent); }
.blog-title {
    font-family: var(--font-display);
    font-size: clamp(30px, 4.4vw, 50px); font-weight: 800;
    line-height: 1.12; letter-spacing: -1px; margin-bottom: 22px; max-width: 900px;
}
.blog-lead { font-size: 19px; color: var(--c-text-dim); line-height: 1.7; max-width: 720px; }

/* ============ BLOG LISTING GRID ============ */
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding: 40px 0 40px; }
.post-card {
    display: flex; flex-direction: column;
    background: var(--c-surface); border: 1px solid var(--c-border);
    border-radius: var(--radius-lg); overflow: hidden;
    text-decoration: none; color: var(--c-text);
    transition: transform 0.35s cubic-bezier(0.16,1,0.3,1), border-color 0.35s, background 0.35s;
}
.post-card:hover { transform: translateY(-4px); border-color: var(--c-border-light); background: var(--c-surface-hover); }
.post-card-cover {
    height: 168px; position: relative; overflow: hidden;
    display: flex; align-items: center; justify-content: center;
    font-size: 54px;
    background: radial-gradient(120% 120% at 20% 0%, rgba(59,245,160,0.16), transparent 55%), var(--c-bg-3);
    border-bottom: 1px solid var(--c-border);
}
.post-card-cover.cover-orange { background: radial-gradient(120% 120% at 20% 0%, rgba(255,138,80,0.16), transparent 55%), var(--c-bg-3); }
.post-card-cover.cover-blue { background: radial-gradient(120% 120% at 20% 0%, rgba(91,138,255,0.16), transparent 55%), var(--c-bg-3); }
.post-card-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.post-tag {
    display: inline-block; align-self: flex-start;
    font-family: var(--font-display); font-size: 10px; font-weight: 700;
    letter-spacing: 1.5px; text-transform: uppercase; color: var(--c-accent);
    background: var(--c-accent-dim); border-radius: 100px; padding: 5px 12px; margin-bottom: 16px;
}
.post-card h2 { font-family: var(--font-display); font-size: 19px; font-weight: 700; line-height: 1.3; margin-bottom: 12px; letter-spacing: -0.3px; }
.post-card p { font-size: 15px; color: var(--c-text-dim); line-height: 1.6; margin-bottom: 20px; flex: 1; }
.post-meta { font-size: 13px; color: var(--c-text-dimmer); display: flex; gap: 14px; align-items: center; }
.post-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--c-text-dimmer); }

/* ============ ARTICLE ============ */
.article { padding: 20px 0 40px; }
.article-meta { display: flex; gap: 14px; align-items: center; font-size: 14px; color: var(--c-text-dimmer); margin-bottom: 34px; flex-wrap: wrap; }
.article-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--c-text-dimmer); }
.article-body { font-size: 18px; line-height: 1.8; color: #D7D6E0; }
.article-body > .lead { font-size: 21px; line-height: 1.7; color: var(--c-text); margin-bottom: 36px; }
.article-body h2 {
    font-family: var(--font-display); font-size: clamp(24px, 3vw, 30px); font-weight: 700;
    line-height: 1.25; letter-spacing: -0.5px; color: var(--c-text);
    margin: 52px 0 20px; scroll-margin-top: 100px;
}
.article-body h3 {
    font-family: var(--font-display); font-size: 21px; font-weight: 600;
    color: var(--c-text); margin: 36px 0 14px; letter-spacing: -0.3px;
}
.article-body p { margin-bottom: 22px; }
.article-body a { color: var(--c-accent); text-decoration: none; border-bottom: 1px solid rgba(59,245,160,0.35); transition: border-color 0.2s; }
.article-body a:hover { border-color: var(--c-accent); }
.article-body strong { color: var(--c-text); font-weight: 600; }
.article-body ul, .article-body ol { margin: 0 0 24px 4px; padding-left: 24px; }
.article-body li { margin-bottom: 12px; }
.article-body ul li::marker { color: var(--c-accent); }
.article-body ol li::marker { color: var(--c-accent); font-weight: 600; }
.article-body blockquote {
    margin: 32px 0; padding: 4px 0 4px 28px;
    border-left: 3px solid var(--c-accent);
    font-size: 22px; line-height: 1.5; color: var(--c-text);
    font-family: var(--font-display); font-weight: 500; letter-spacing: -0.3px;
}
.article-body figure { margin: 0 0 22px; }
.article-body img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--c-border); }

/* callout / highlight box */
.callout {
    background: var(--c-surface); border: 1px solid var(--c-border-light);
    border-radius: var(--radius); padding: 24px 26px; margin: 32px 0;
    font-size: 16px; line-height: 1.7; color: var(--c-text-dim);
}
.callout strong { color: var(--c-text); }
.callout-accent { border-left: 3px solid var(--c-accent); }
.callout-orange { border-left: 3px solid var(--c-orange); }

/* comparison "before/after" */
.ba-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 32px 0; }
.ba-card { border-radius: var(--radius); padding: 24px; border: 1px solid var(--c-border); }
.ba-card h4 { font-family: var(--font-display); font-size: 13px; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 14px; }
.ba-before { background: var(--c-red-dim); border-color: rgba(255,90,110,0.25); }
.ba-before h4 { color: var(--c-red); }
.ba-after { background: var(--c-accent-dim); border-color: rgba(59,245,160,0.25); }
.ba-after h4 { color: var(--c-accent); }
.ba-card ul { margin: 0; padding-left: 20px; }
.ba-card li { font-size: 15px; color: var(--c-text-dim); }

/* stat strip */
.stat-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 36px 0; }
.stat-box { background: var(--c-bg-2); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px 24px; }
.stat-box .num { font-family: var(--font-display); font-size: 34px; font-weight: 800; color: var(--c-accent); letter-spacing: -1px; line-height: 1; margin-bottom: 10px; }
.stat-box .cap { font-size: 14px; color: var(--c-text-dim); line-height: 1.5; }

/* data table */
.article-body table { width: 100%; border-collapse: collapse; margin: 28px 0; font-size: 15px; }
.article-body th, .article-body td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--c-border); }
.article-body th { font-family: var(--font-display); font-size: 12px; letter-spacing: 0.5px; text-transform: uppercase; color: var(--c-text-dim); }
.article-body td { color: var(--c-text-dim); }
.article-body tr td:first-child { color: var(--c-text); }

/* TOC */
.toc { background: var(--c-bg-2); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 22px 26px; margin: 0 0 40px; }
.toc-title { font-family: var(--font-display); font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--c-text-dimmer); margin-bottom: 14px; }
.toc ol { margin: 0; padding-left: 20px; }
.toc li { margin-bottom: 9px; font-size: 15px; }
.toc a { color: var(--c-text-dim); text-decoration: none; border: none; }
.toc a:hover { color: var(--c-accent); }

/* inline CTA block */
.cta-block {
    margin: 48px 0; padding: 40px 36px; text-align: center;
    background: radial-gradient(120% 140% at 50% 0%, rgba(59,245,160,0.12), transparent 60%), var(--c-surface);
    border: 1px solid var(--c-border-light); border-radius: var(--radius-lg);
}
.cta-block h3 { font-family: var(--font-display); font-size: clamp(22px, 3vw, 28px); font-weight: 700; line-height: 1.25; letter-spacing: -0.5px; margin-bottom: 14px; }
.cta-block p { font-size: 16px; color: var(--c-text-dim); max-width: 520px; margin: 0 auto 26px; }

/* author / share */
.article-foot { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--c-border); display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
.author { display: flex; gap: 14px; align-items: center; }
.author-badge { width: 46px; height: 46px; border-radius: 50%; background: var(--c-accent-dim); color: var(--c-accent); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800; font-size: 18px; flex-shrink: 0; }
.author-name { font-weight: 600; color: var(--c-text); font-size: 15px; }
.author-role { font-size: 13px; color: var(--c-text-dimmer); }

/* related */
.related { padding: 40px 0 20px; }
.related-title { font-family: var(--font-display); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; color: var(--c-text-dimmer); margin-bottom: 26px; }

/* ============ FOOTER ============ */
.footer { border-top: 1px solid var(--c-border); padding: 40px 0; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; }
.footer-copy { font-size: 14px; color: var(--c-text-dimmer); }
.footer-links { display: flex; gap: 24px; list-style: none; }
.footer-links a { color: var(--c-text-dimmer); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: var(--c-text-dim); }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
    .post-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .ba-grid { grid-template-columns: 1fr; }
    .stat-strip { grid-template-columns: 1fr; }
    .blog-head { padding: 130px 0 30px; }
}
@media (max-width: 500px) {
    .container, .container-narrow { padding: 0 20px; }
    .article-body { font-size: 17px; }
    .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
    .article-foot { flex-direction: column; align-items: flex-start; }
}