/* ═══════════════════════════════════════════════════════════ */
/* NEIRY METRICS — SHARED STYLES                              */
/* ═══════════════════════════════════════════════════════════ */
:root {
  --bg: #F8F9FB;
  --bg2: #FFFFFF;
  --bg3: #F1F3F7;
  --border: rgba(0,0,0,0.08);
  --border2: rgba(0,0,0,0.14);
  --text: #1A1D26;
  --text2: #4B5563;
  --text3: #9CA3AF;
  --c-rhythms: #7C3AED;
  --c-peaks: #3B82F6;
  --c-alpha: #8B5CF6;
  --c-cognitive: #EC4899;
  --c-indices: #F59E0B;
  --c-ppg: #EF4444;
  --c-states: #10B981;
  --c-tech: #6B7280;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'DM Sans',sans-serif;color:var(--text);background:var(--bg);line-height:1.65;font-weight:400;overflow-x:hidden;padding-top:64px}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:'Syne',sans-serif;font-weight:700;line-height:1.15}

/* ── HERO ── */
.hero{position:relative;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;padding:56px 24px 40px;
  background:radial-gradient(ellipse 600px 400px at 30% 40%,rgba(37,99,235,0.06),transparent),radial-gradient(ellipse 500px 350px at 70% 60%,rgba(124,58,237,0.05),transparent),radial-gradient(ellipse 400px 300px at 50% 80%,rgba(5,150,105,0.04),transparent),var(--bg)}
.hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(0,0,0,0.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,0.04) 1px,transparent 1px);background-size:60px 60px;pointer-events:none}
.hero-inner{position:relative;z-index:1;max-width:740px}
.hero-eyebrow{font-family:'DM Mono',monospace;font-size:12px;letter-spacing:4px;color:var(--text3);margin-bottom:20px;text-transform:uppercase}
.hero h1{font-size:clamp(32px,5vw,52px);font-weight:800;margin-bottom:16px;background:linear-gradient(135deg,#1A1D26 0%,#2563EB 50%,#7C3AED 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:clamp(15px,2vw,17px);color:var(--text2);max-width:560px;margin:0 auto}

/* ── STICKY NAV (section pages) ── */
.sticky-header{position:sticky;top:0;z-index:100;background:rgba(248,249,251,0.95);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid var(--border2);box-shadow:0 1px 8px rgba(0,0,0,0.06)}
.block-nav{overflow-x:auto;scrollbar-width:none}
.block-nav::-webkit-scrollbar{display:none}
.block-nav-inner{display:flex;gap:2px;padding:10px 20px;min-width:max-content;max-width:1100px;margin:0 auto}
.block-nav-btn{display:flex;align-items:center;gap:5px;padding:6px 14px;border-radius:6px;font-family:'DM Mono',monospace;font-size:11px;color:var(--text3);border:none;background:transparent;cursor:pointer;white-space:nowrap;transition:.2s;text-decoration:none}
.block-nav-btn:hover{color:var(--text);background:rgba(0,0,0,0.04);text-decoration:none}
.block-nav-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}

/* ── CONTENT ── */
.content{max-width:900px;margin:0 auto;padding:40px 24px 80px}

/* ── SECTION HEADER ── */
.section-intro{margin-bottom:32px}
.section-intro p{color:var(--text2);font-size:0.95rem;margin-top:8px}

/* ── METRIC CARD ── */
.metric{background:var(--bg2);border-radius:16px;border:1px solid var(--border);padding:32px;margin-bottom:28px;position:relative;overflow:hidden;scroll-margin-top:70px;box-shadow:0 2px 12px rgba(0,0,0,0.04)}
.metric::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;border-radius:16px 0 0 16px}
.metric.c-rhythms::before{background:var(--c-rhythms)}
.metric.c-peaks::before{background:var(--c-peaks)}
.metric.c-alpha::before{background:var(--c-alpha)}
.metric.c-cognitive::before{background:var(--c-cognitive)}
.metric.c-indices::before{background:var(--c-indices)}
.metric.c-ppg::before{background:var(--c-ppg)}
.metric.c-states::before{background:var(--c-states)}
.metric.c-tech::before{background:var(--c-tech)}
.metric-name{font-size:clamp(20px,3vw,26px);font-weight:800;margin-bottom:6px}
.metric-formula{font-family:'DM Mono',monospace;font-size:14px;color:var(--text3);background:var(--bg3);display:inline-block;padding:4px 12px;border-radius:6px;margin-bottom:16px}

/* ── SUB-SECTION ── */
.msub{margin-top:20px}
.msub-label{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--text3);margin-bottom:8px}
.msub h4{font-family:'Syne',sans-serif;font-size:15px;font-weight:700;margin-bottom:6px}
.msub p{color:var(--text2);font-size:0.92rem;margin-bottom:8px}
.msub ul{color:var(--text2);font-size:0.92rem;padding-left:20px;margin-bottom:8px}
.msub li{margin-bottom:4px}

/* ── RANGE BADGES ── */
.ranges{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.badge{font-family:'DM Mono',monospace;font-size:12px;padding:5px 12px;border-radius:20px;font-weight:500}
.badge.green{background:rgba(16,185,129,0.12);color:#059669}
.badge.yellow{background:rgba(245,158,11,0.12);color:#D97706}
.badge.red{background:rgba(239,68,68,0.12);color:#DC2626}
.badge.blue{background:rgba(59,130,246,0.12);color:#2563EB}
.badge.gray{background:rgba(107,114,128,0.12);color:#4B5563}
.badge.purple{background:rgba(124,58,237,0.12);color:#7C3AED}

/* ── MYTH BLOCK ── */
.myth{background:rgba(245,158,11,0.06);border-radius:10px;border:1px solid rgba(245,158,11,0.2);padding:14px 18px;margin:8px 0;font-size:0.88rem}
.myth em{color:var(--text3)}
.myth strong{color:#D97706}

/* ── STATE BLOCKS ── */
.state-block{background:var(--bg3);border-radius:10px;padding:14px 18px;margin:6px 0;font-size:0.9rem;color:var(--text2);border-left:3px solid var(--border2)}
.state-block.eyes-closed{border-left-color:var(--c-alpha)}
.state-block.eyes-open{border-left-color:var(--c-peaks)}

/* ── BACK LINK ── */
.back-link{display:inline-flex;align-items:center;gap:8px;font-family:'DM Mono',monospace;font-size:13px;color:var(--text3);margin-bottom:24px;padding:8px 16px;border-radius:8px;background:var(--bg3);transition:.2s}
.back-link:hover{color:var(--text);background:var(--border);text-decoration:none}

/* ── TRUST PYRAMID ── */
.trust-level{border-radius:12px;padding:18px 22px;margin:10px 0;border-left:4px solid}
.trust-level h4{font-size:0.95rem;margin-bottom:6px}
.trust-level p{font-size:0.88rem;color:var(--text2);margin:0}
.trust-1{background:rgba(239,68,68,0.06);border-color:#EF4444}
.trust-2{background:rgba(245,158,11,0.06);border-color:#F59E0B}
.trust-3{background:rgba(59,130,246,0.06);border-color:#3B82F6}
.trust-4{background:rgba(107,114,128,0.06);border-color:#6B7280}

/* ── HUB CARDS ── */
.hub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:32px 0}
.hub-card{background:var(--bg2);border-radius:16px;border:1px solid var(--border);padding:24px 24px 48px;transition:transform .2s,box-shadow .2s;display:block;position:relative;overflow:hidden;cursor:pointer}
.hub-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,0.08);text-decoration:none}
.hub-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px}
.hub-card::after{content:'Подробнее →';position:absolute;bottom:16px;right:20px;font-family:'DM Mono',monospace;font-size:12px;letter-spacing:0.5px;color:var(--text3);transition:color .2s,transform .2s}
.hub-card:hover::after{color:var(--text);transform:translateX(3px)}
.hub-card .hub-count{font-family:'DM Mono',monospace;font-size:11px;color:var(--text3);letter-spacing:1px;margin-bottom:6px}
.hub-card h3{font-size:18px;margin-bottom:8px;color:var(--text)}
.hub-card p{font-size:0.85rem;color:var(--text2);line-height:1.5}
.hub-card.c-rhythms::before{background:var(--c-rhythms)}
.hub-card.c-peaks::before{background:var(--c-peaks)}
.hub-card.c-alpha::before{background:var(--c-alpha)}
.hub-card.c-cognitive::before{background:var(--c-cognitive)}
.hub-card.c-indices::before{background:var(--c-indices)}
.hub-card.c-ppg::before{background:var(--c-ppg)}
.hub-card.c-states::before{background:var(--c-states)}
.hub-card.c-tech::before{background:var(--c-tech)}

/* ── TECH SECTION ── */
.tech-section{background:var(--bg3);border-radius:16px;border:1px solid var(--border2);padding:28px;margin-top:40px}
.tech-section h3{font-size:15px;margin-bottom:12px}
.tech-item{padding:12px 0;border-bottom:1px solid var(--border);font-size:0.9rem;color:var(--text2)}
.tech-item:last-child{border-bottom:none}
.tech-item strong{color:var(--text);font-weight:500}

/* ── BREADCRUMBS ── */
.breadcrumbs{display:flex;align-items:center;gap:6px;font-family:'DM Mono',monospace;font-size:12px;color:var(--text3);margin-bottom:24px;flex-wrap:wrap}
.breadcrumbs a{color:var(--text3);transition:color .15s}
.breadcrumbs a:hover{color:var(--text);text-decoration:none}
.breadcrumbs .sep{opacity:0.4}

/* ── METRIC NAV (prev/next) ── */
.metric-nav{display:flex;justify-content:space-between;gap:16px;margin-top:48px;padding-top:24px;border-top:1px solid var(--border)}
.metric-nav a{display:flex;flex-direction:column;gap:4px;padding:14px 18px;border-radius:12px;background:var(--bg3);border:1px solid var(--border);transition:all .2s;max-width:48%;text-decoration:none}
.metric-nav a:hover{background:var(--bg2);box-shadow:0 4px 16px rgba(0,0,0,0.06);text-decoration:none}
.metric-nav .nav-dir{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--text3)}
.metric-nav .nav-name{font-family:'Syne',sans-serif;font-size:15px;font-weight:700;color:var(--text)}
.metric-nav .next{text-align:right;margin-left:auto}

/* ── METRIC SUMMARY CARD (section hub) ── */
.metric-summary{background:var(--bg2);border-radius:16px;border:1px solid var(--border);padding:20px 24px 48px;transition:transform .2s,box-shadow .2s;display:block;position:relative;overflow:hidden;cursor:pointer}
.metric-summary:hover{transform:translateY(-3px);box-shadow:0 8px 32px rgba(0,0,0,0.07);text-decoration:none}
.metric-summary::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;border-radius:16px 0 0 16px}
.metric-summary::after{content:'Читать подробнее →';position:absolute;bottom:14px;right:18px;font-family:'DM Mono',monospace;font-size:11px;letter-spacing:0.5px;color:var(--text3);transition:color .2s,transform .2s}
.metric-summary:hover::after{color:var(--text);transform:translateX(3px)}
.metric-summary h3{font-size:17px;margin-bottom:4px;color:var(--text)}
.metric-summary .metric-formula{margin-bottom:8px;font-size:12px}
.metric-summary p{font-size:0.85rem;color:var(--text2);line-height:1.5;margin:0}
.metric-summary .ranges{margin:8px 0 0}

/* ── SECTION METRIC GRID ── */
.metrics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;margin:24px 0}

/* ── RESPONSIVE ── */
@media(max-width:640px){
  .metric{padding:20px 18px}
  .hub-grid{grid-template-columns:1fr}
  .metrics-grid{grid-template-columns:1fr}
  .metric-nav{flex-direction:column}
  .metric-nav a{max-width:100%}
  .metric-nav .next{text-align:left;margin-left:0}
}