/* Gợi ý combo trên trang sản phẩm, trang thanh toán, cuối /bundle/:slug (public/js/combo-offers.js) */
.co-sec,.co-hint,.co-nudge{--co-ink:#0f172a;--co-text:#334155;--co-muted:#64748b;--co-line:#e5e7eb;--co-soft:#f8fafc;--co-green:#10b981;--co-green-d:#047857;--co-green-bg:#ecfdf5;--co-cta:#e94560;--co-cta-h:#c81e3a;--co-amber-bg:#fef3c7;--co-amber:#92400e}
.co-sec *,.co-nudge *{box-sizing:border-box}
.co-sec :where(h2,h3,p){margin:0}
.co-sec{background:var(--co-green-bg);padding:64px 0;color:var(--co-text);line-height:1.6}
.co-wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.co-eyebrow{display:block;text-align:center;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--co-green-d);margin-bottom:10px}
.co-h2{font-size:clamp(24px,3.2vw,32px);font-weight:800;line-height:1.2;letter-spacing:-.015em;color:var(--co-ink);text-align:center;text-wrap:balance}
.co-sub{font-size:16px;color:var(--co-muted);text-align:center;max-width:620px;margin:10px auto 32px}
.co-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.co-grid--1{max-width:560px;margin:0 auto;grid-template-columns:minmax(0,1fr)}
.co-grid--2{max-width:900px;margin:0 auto}
.co-card{position:relative;display:flex;flex-direction:column;gap:12px;background:#fff;border:1.5px solid var(--co-line);border-radius:18px;padding:22px;min-width:0}
.co-card--featured{border:2px solid var(--co-green)}
.co-aud{font-size:12px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--co-green-d)}
.co-name{font-size:20px;font-weight:800;line-height:1.25;color:var(--co-ink)}
.co-name a{color:inherit;text-decoration:none}
.co-name a:hover{text-decoration:underline;text-underline-offset:3px}
.co-eq{display:flex;align-items:center;flex-wrap:wrap;gap:6px}
.co-thumb{position:relative;width:46px;height:46px;border-radius:11px;background:var(--co-soft);border:1.5px solid var(--co-line);overflow:hidden;flex:none;display:grid;place-items:center;font-size:13px;font-weight:800;color:var(--co-muted)}
.co-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center top;background:#fff}
.co-thumb--me{border:2.5px solid var(--co-green);box-shadow:0 0 0 3px rgba(16,185,129,.18)}
.co-op{font-size:20px;font-weight:300;color:#94a3b8;padding:0 2px} /* chỉ trang trí, aria-hidden */
.co-items{font-size:14px;color:var(--co-muted)}
.co-delta{font-size:15px;color:var(--co-ink);background:var(--co-soft);border-radius:10px;padding:8px 12px}
.co-delta b{color:var(--co-green-d)}
.co-price{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:8px 12px;margin-top:auto}
.co-price__old{display:block;font-size:14px;color:var(--co-muted);text-decoration:line-through}
.co-price__now{display:block;font-size:26px;font-weight:900;line-height:1.1;color:var(--co-ink);letter-spacing:-.02em}
.co-save{font-size:13px;font-weight:800;background:var(--co-amber-bg);color:var(--co-amber);padding:4px 10px;border-radius:999px;white-space:nowrap}
.co-actions{display:flex;gap:10px}
.co-btn{flex:1;display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 16px;border-radius:12px;font-size:15px;font-weight:800;text-decoration:none;white-space:nowrap;transition:background .15s,transform .15s}
.co-btn--ghost{background:#fff;color:var(--co-ink);border:1.5px solid var(--co-line)}
.co-btn--ghost:hover{background:var(--co-soft);color:var(--co-ink)}
.co-btn--buy{background:var(--co-cta);color:#fff;box-shadow:0 8px 20px rgba(233,69,96,.22)}
.co-btn--buy:hover{background:var(--co-cta-h);color:#fff;transform:translateY(-1px)}
.co-all{text-align:center;margin-top:26px!important;font-weight:700}
.co-all a{color:var(--co-green-d)}
.co-hint{display:flex;align-items:flex-start;gap:8px;margin-top:14px;padding:10px 12px;border-radius:10px;background:var(--co-green-bg);border:1px solid #a7f3d0;color:var(--co-green-d);font-size:14px;line-height:1.45;text-align:left;text-decoration:none}
.co-hint:hover{background:#d1fae5;color:var(--co-green-d)}
.co-hint svg{width:18px;height:18px;flex:none;margin-top:1px}
.co-hint b{color:var(--co-ink)}
.co-sec--others{background:#fff;border-top:1px solid var(--co-line)}
.co-mini{display:flex;flex-direction:column;gap:10px;background:#fff;border:1.5px solid var(--co-line);border-radius:16px;padding:18px;text-decoration:none;color:var(--co-text);transition:border-color .15s,box-shadow .15s}
.co-mini:hover{border-color:var(--co-green);box-shadow:0 10px 24px rgba(15,23,42,.08);color:var(--co-text)}
.co-mini__name{font-size:18px;font-weight:800;line-height:1.3;color:var(--co-ink)}
.co-mini .co-thumb{width:38px;height:38px;border-radius:9px;font-size:11px}
.co-mini__price{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 8px}
.co-mini__price b{font-size:20px;font-weight:900;color:var(--co-ink)}
.co-mini__price s{font-size:13px;color:var(--co-muted)}
.co-nudge{border:2px dashed var(--co-green);background:var(--co-green-bg);border-radius:12px;padding:14px 16px;margin-bottom:16px;line-height:1.5}
.co-nudge__head{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--co-green-d)}
.co-nudge__head svg{width:18px;height:18px;flex:none}
.co-nudge__body{font-size:13px;color:var(--co-text);margin:6px 0 12px}
.co-nudge__btn{width:100%;min-height:44px;font-size:14px;background:#fff;color:var(--co-green-d);border:1.5px solid var(--co-green)}
.co-nudge__btn:hover{background:#d1fae5;color:var(--co-green-d)}
@media (max-width:640px){
  .co-sec{padding:48px 0}
  .co-wrap{padding:0 16px}
  .co-card{padding:18px}
  .co-price__now{font-size:24px}
}