.btx-alert-backdrop{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:28px 18px;gap:0;background:radial-gradient(circle at 30% 20%,rgba(255,255,255,.06),rgba(255,255,255,0)),rgba(0,0,0,.55);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .16s ease}.btx-alert-backdrop.is-visible{opacity:1;pointer-events:auto}body.btx-alert-locked{overflow:hidden}.btx-alert{width:min(440px,100%);background:linear-gradient(135deg,rgba(255,255,255,.06),rgba(255,255,255,.02)),var(--header-bg-color,#0e0f13);color:var(--header-text-color,#0d0d0d);border:1px solid rgba(0,0,0,.2);box-shadow:0 16px 50px rgba(0,0,0,.35),0 1px 0 rgba(255,255,255,.04) inset;border-radius:18px;padding:18px 18px 16px;position:relative;transform:translateY(8px) scale(.98);transition:transform .18s ease,box-shadow .18s ease;font-family:var(--header-footer-font,"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif)}.btx-alert-backdrop.is-visible .btx-alert{transform:translateY(0) scale(1);box-shadow:0 24px 70px rgba(0,0,0,.42)}.btx-alert__spark{position:absolute;inset:0;top:-1px;height:5px;width:100%;background:linear-gradient(120deg,var(--accent-color,#ffc107),rgba(255,255,255,.6),var(--accent-color,#ffc107));border-radius:18px 18px 12px 12px;box-shadow:0 8px 20px rgba(0,0,0,.2)}.btx-alert__header{display:flex;align-items:center;gap:12px;margin-bottom:10px}.btx-alert__badge{width:44px;height:44px;border-radius:14px;background:var(--accent-color,#ffc107);color:var(--btx-accent-text,#111);display:grid;place-items:center;font-weight:800;font-size:20px;box-shadow:0 10px 22px rgba(0,0,0,.25),0 0 0 1px rgba(255,255,255,.25)}.btx-alert__titles{flex:1}.btx-alert__eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:11px;font-weight:700;color:var(--header-text-color,#111);opacity:.65}.btx-alert__title{margin:3px 0 0;font-size:20px;font-weight:800;line-height:1.2}.btx-alert__close{background:rgba(255,255,255,.04);color:var(--header-text-color,#111);border:1px solid rgba(255,255,255,.12);width:38px;height:38px;border-radius:12px;display:grid;place-items:center;cursor:pointer;transition:background .12s ease,transform .12s ease,border-color .12s ease}.btx-alert__close:hover{background:rgba(255,255,255,.08);transform:translateY(-1px);border-color:rgba(255,255,255,.2)}.btx-alert__close:focus-visible,.btx-alert__action:focus-visible{outline:2px solid var(--accent-color,#ffc107);outline-offset:2px}.btx-alert__body{margin:0 4px 6px;font-size:16px;line-height:1.6;color:var(--header-text-color,#111);white-space:pre-line}.btx-alert__actions{margin-top:12px;display:flex;justify-content:flex-end;gap:10px}.btx-alert__action{background:var(--accent-color,#ffc107);color:var(--btx-accent-text,#111);border:0;border-radius:12px;padding:11px 18px;font-weight:800;letter-spacing:.01em;cursor:pointer;box-shadow:0 12px 30px rgba(0,0,0,.22),0 1px 0 rgba(255,255,255,.12) inset;transition:transform .12s ease,filter .12s ease,box-shadow .12s ease}.btx-alert__action:hover{filter:brightness(.96);transform:translateY(-1px);box-shadow:0 16px 36px rgba(0,0,0,.26)}.btx-alert__action:active{transform:translateY(0);filter:brightness(.93)}@media (max-width:600px){.btx-alert{padding:16px 14px 14px;border-radius:16px}.btx-alert__header{align-items:flex-start}.btx-alert__badge{width:40px;height:40px;font-size:18px}.btx-alert__title{font-size:18px}}@media (prefers-reduced-motion:reduce){.btx-alert-backdrop,.btx-alert,.btx-alert__action,.btx-alert__close{transition:none !important}.btx-alert{transform:none !important}}