/* ============================================================
   THEME B — ENGINEERED LIGHT  ·  Swiss / blueprint precision
   iFixit × Linear × Stripe Docs  ·  antidote to "empty"
   ============================================================ */
[data-theme="b"] {
  --bg:        #f6f7f9;
  --surface:   #ffffff;
  --surface-2: #eef1f5;
  --ink:       #0e1116;
  --ink-2:     #444b57;
  --ink-3:     #828a98;
  --line:      #e2e6ec;
  --line-2:    #ccd2dc;
  --accent:    #2563eb;
  --accent-2:  #f59e0b;
  --photo-bg:  #ffffff;
  --r-card:    14px;
  --shadow-sm: 0 1px 2px rgba(20,30,50,.05);
  --shadow-md: 0 4px 14px rgba(20,30,50,.07);
  --shadow-lg: 0 18px 44px rgba(20,30,50,.11);
}

/* Blueprint grid wash */
[data-theme="b"] body { background-color: var(--bg); }
/* ag lane-1440 (02.09): сетка-подложка ушла с body на фиксированный слой и гаснет к полям —
   на широких экранах «нарисованная, но пустая» сетка в полях подчёркивала пустоту.
   Полностью видна под колеёй контента (1408px), к краям окна сходит на нет.
   На экранах ≤1440 полей нет — маска вырождается, сетка как раньше. */
[data-theme="b"] body::before {
  content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(37,99,235,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.045) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 max(0px, calc(50% - 704px)), #000 min(100%, calc(50% + 704px)), transparent 100%);
          mask-image: linear-gradient(90deg, transparent 0, #000 max(0px, calc(50% - 704px)), #000 min(100%, calc(50% + 704px)), transparent 100%);
}

/* Crisp structural surfaces — flat, hairline, layered */
[data-theme="b"] .site-header { background: rgba(255,255,255,.96); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); } /* ag search404_07: .9→.96 + blur 12→18 — тёмные фото не просвечивают сквозь шапку */

/* Section headers get a blueprint label + rule */
[data-theme="b"] .section-head { position: relative; padding-top: var(--s-14); border-top: 2px solid var(--ink); align-items: center; }
[data-theme="b"] .section-head .h2 { position: relative; }
[data-theme="b"] .section-head::before {
  content: attr(data-index); position: absolute; top: -2px; right: 0;
  font-family: var(--mono); font-size: 11px; font-weight: 600; color: var(--ink-3);
}

/* Cards: precise corner ticks + hairline borders */
[data-theme="b"] .prod, [data-theme="b"] .bento-tile {
  border-radius: var(--r-card); box-shadow: var(--shadow-sm);
}
[data-theme="b"] .prod::before, [data-theme="b"] .prod::after {
  content: ''; position: absolute; width: 8px; height: 8px; z-index: 3; pointer-events: none;
  border-color: var(--line-2); border-style: solid; opacity: 0; transition: opacity .18s;
}
[data-theme="b"] .prod::before { top: 7px; left: 7px; border-width: 1px 0 0 1px; }
[data-theme="b"] .prod::after  { bottom: 7px; right: 7px; border-width: 0 1px 1px 0; }
[data-theme="b"] .prod:hover::before, [data-theme="b"] .prod:hover::after { opacity: 1; border-color: var(--accent); }
[data-theme="b"] .prod:hover { border-color: var(--accent); }

/* Product media: subtle grid backing + ruler tick frame */
[data-theme="b"] .prod-media, [data-theme="b"] .gallery-main {
  background-color: #fff;
  background-image:
    linear-gradient(rgba(37,99,235,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.05) 1px, transparent 1px);
  background-size: 22px 22px;
}
[data-theme="b"] .gallery-main { border-radius: var(--r-md); }

/* Bento: structural, count emphasized in mono w/ baseline */
[data-theme="b"] .bento-tile { border-radius: var(--r-md); }
[data-theme="b"] .bento-tile .bt-count { color: var(--accent); }
[data-theme="b"] .bento-tile:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }

/* Picker / buybox: engineered panel with top accent rule */
[data-theme="b"] .picker, [data-theme="b"] .buybox { border-radius: var(--r-md); border-top: 3px solid var(--accent); }

/* Trust strip: numbered, bordered, tight */
[data-theme="b"] .trust-card { border-radius: var(--r-md); border: 1px solid var(--line); background: var(--surface); }
[data-theme="b"] .trust-card .ti { border-radius: var(--r-sm); background: var(--blue-soft); }

/* Hero: structural, blueprint accent */
[data-theme="b"] .hero { border-bottom: 1px solid var(--line); }
[data-theme="b"] .hero h1 .accent { color: var(--accent); }
[data-theme="b"] .hero-photo { border-radius: var(--r-md); border: 1px solid var(--line); box-shadow: var(--shadow-md);
  background-color: #fff;
  background-image: linear-gradient(rgba(37,99,235,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(37,99,235,.05) 1px, transparent 1px);
  background-size: 26px 26px;
}

/* Discounts in amber, availability green — engineered palette */
[data-theme="b"] .prod-disc, [data-theme="b"] .buybox .price-disc { background: #f59e0b; color: #1a1205; }

/* Spec table: monospace technical readout */
[data-theme="b"] .spectable { border-radius: var(--r-md); }
[data-theme="b"] .spectable .sr .v { font-family: var(--mono); font-weight: 600; font-size: 13px; }

/* FAQ / sections square-ish */
[data-theme="b"] .faq-item, [data-theme="b"] .reviews-head, [data-theme="b"] .seo { border-radius: var(--r-md); }

/* Footer stays graphite for contrast anchor */
[data-theme="b"] .site-footer { background: #0e1116; }

/* ============================================================
   POLISH 2026-09-02 — метка секции (пункт 21)
   Бэкап: theme-b.css.bak_20260902polish
   ============================================================ */
/* Была светло-серой (--ink-3 ≈ 2:1 к фону) и висела над ссылкой, не попадая
   на базовую линию заголовка. Сажаем на линию-разделитель и добавляем контраст. */
[data-theme="b"] .section-head::before {
  top: -20px; color: var(--ink-2); opacity: .85;
  background: none; padding: 0; letter-spacing: .06em;
}
@media (max-width: 768px) { [data-theme="b"] .section-head::before { top: -18px; font-size: 10.5px; } }