/* ============================================================* BTU common.css — shared utility classes* Phase 1 CSS extraction (2026-06-02)** Replaces frequently-repeated inline style= attributes.* Naming:.u-* for utilities,.btu-* for BTU-namespaced shared blocks.* ============================================================ */.u-mb-14{margin-bottom:14px}.u-mb-18{margin-bottom:18px}.u-mt-auto{margin-left:auto}.u-ta-right{text-align:right}.u-flex-wrap{flex-wrap:wrap}.u-relative-z2{position:relative;z-index:2}.u-img-fluid{max-width:100%;height:auto}.btu-page-title{font-size:32px;font-weight:800;color:#1a1a1a;margin-bottom:16px;letter-spacing:-0.01em;}.btu-page-lead{font-size:17px;color:#5a5a5f;line-height:1.6;}.btu-input-flat{width:100%;padding:10px 12px;border:1px solid #e6e9f5;border-radius:8px;font-size:14px;}.btu-input-md{padding:11px 14px;border-radius:10px;border:1px solid #e1e1e7;}.btu-field-label{font-size:12px;font-weight:700;color:#475569;text-transform:uppercase;letter-spacing:0.05em;display:block;margin-bottom:6px;}.btu-field-hint{color:#64748b;font-size:13px;margin-bottom:18px;}.btu-field-hint--sm{color:#64748b;font-size:13px;margin-bottom:14px;}.btu-page-bg{background:#f7f8fa;min-height:70vh;padding:40px 0;}.btu-page-bg--tall{background:#f7f8fa;min-height:80vh;}.btu-icon-chip{width:40px;height:40px;background:rgba(var(--brand-primary-rgb),0.1);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--brand-primary);font-size:16px;flex-shrink:0;}.btu-btn-xs{padding:6px 10px;font-size:12px}.btu-btn-sm{padding:6px 12px;font-size:12px}.u-fs-13{font-size:13px}.u-fs-18{font-size:18px}.u-c-white{color:#fff}.u-c-slate{color:#94a3b8;font-size:13px}.u-c-brand-accent{color:var(--brand-accent)}.btu-flex-row-start{display:flex;align-items:start;gap:14px;}.btu-container-1400{max-width:1400px;margin:0 auto 0;padding:0 20px;}.btu-dark-bar{margin-top:18px;padding:16px;background:#0f172a;border-radius:10px;color:#fff;}.u-icon-muted{opacity:.55;margin-right:4px}