:root{--bk-blue:#176d94;--bk-sky:#36a9d8;--bk-green:#45b82f;--bk-text:#17394b;--bk-muted:#6d7d86;--bk-card:rgba(255,255,255,.97);--bk-danger:#c92a2a;--bk-success:#217a3c}
*{box-sizing:border-box;margin:0;padding:0}
html{min-height:100%;background:#176d94}
body.bk-login-page{min-height:100vh;min-height:100dvh;background:radial-gradient(circle at 85% 8%,rgba(255,255,255,.2),transparent 24%),linear-gradient(180deg,#39addb 0%,#1b7198 58%,#12536f 100%);font-family:system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;color:var(--bk-text);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:clamp(14px,3vw,28px);overflow-x:hidden}
.bk-login-shell{width:min(100%,440px);display:grid;gap:14px}
.bk-login-brand{text-align:center;color:#fff}.bk-login-brand img{width:84px;height:84px;border-radius:50%;object-fit:cover;border:3px solid #fff;box-shadow:0 8px 25px rgba(0,0,0,.2)}.bk-login-brand strong{display:block;font-size:1.65rem;margin-top:5px;text-shadow:0 2px 6px rgba(0,0,0,.2)}.bk-login-brand small{display:block;opacity:.88;margin-top:3px}
.bk-login-card{background:var(--bk-card);border:1px solid rgba(255,255,255,.65);border-radius:28px;padding:clamp(20px,5vw,30px);box-shadow:0 18px 46px rgba(2,45,66,.28);backdrop-filter:blur(10px)}
.bk-login-card h1{font-size:1.55rem;color:var(--bk-blue);text-align:center;margin-bottom:6px}.bk-login-intro{text-align:center;color:var(--bk-muted);font-size:.91rem;line-height:1.9;margin-bottom:18px}
.bk-login-options{display:grid;gap:11px}.bk-login-option{display:grid;grid-template-columns:50px 1fr 24px;align-items:center;gap:12px;text-decoration:none;color:var(--bk-text);background:#f4f9fb;border:1px solid #d7eaf2;border-radius:20px;padding:13px 14px;transition:.18s}.bk-login-option:hover{transform:translateY(-1px);border-color:#90cee5;box-shadow:0 8px 20px rgba(23,109,148,.1)}.bk-login-option-icon{width:50px;height:50px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,#daf3fc,#bfe7f7);font-size:1.45rem}.bk-login-option strong{display:block;font-size:.98rem}.bk-login-option small{display:block;color:var(--bk-muted);font-size:.76rem;margin-top:3px;line-height:1.6}.bk-login-option-arrow{font-size:1.25rem;color:var(--bk-blue)}
.bk-field-group{margin-bottom:14px}.bk-field-group label{display:block;font-size:.84rem;font-weight:750;color:#344d59;margin:0 7px 6px}.bk-field-wrap{position:relative}.bk-field{width:100%;border:1.5px solid #cbd9df;background:#fff;border-radius:17px;padding:13px 15px;font:inherit;color:#183b4a;outline:none;transition:.18s}.bk-field:focus{border-color:var(--bk-sky);box-shadow:0 0 0 4px rgba(54,169,216,.14)}.bk-field[dir=ltr]{text-align:center;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.bk-field-otp{font-size:1.45rem;letter-spacing:.42rem;padding-right:calc(15px + .42rem)}.bk-toggle-password{position:absolute;left:10px;top:50%;transform:translateY(-50%);border:0;background:transparent;padding:7px;cursor:pointer;font-size:1.05rem}
.bk-btn{width:100%;border:0;border-radius:18px;padding:13px 16px;font:inherit;font-weight:850;cursor:pointer;transition:.18s;display:flex;align-items:center;justify-content:center;gap:8px;text-decoration:none}.bk-btn:hover:not(:disabled){transform:translateY(-1px)}.bk-btn:disabled{opacity:.58;cursor:not-allowed}.bk-btn-primary{background:linear-gradient(135deg,#58cc38,#349d20);color:#fff;box-shadow:0 8px 19px rgba(52,157,32,.22)}.bk-btn-blue{background:linear-gradient(135deg,#176d94,#35a8d6);color:#fff}.bk-btn-soft{background:#edf7fb;color:#17658a;border:1px solid #cce7f2;margin-top:9px}.bk-btn-ghost{background:transparent;color:#627985;padding:10px;margin-top:5px}
.bk-stage[hidden]{display:none!important}.bk-phone-mask{display:flex;width:max-content;max-width:100%;direction:ltr;unicode-bidi:isolate;text-align:center;background:#eef6f9;border-radius:14px;padding:9px 13px;margin:10px auto 14px;color:var(--bk-blue);font-family:ui-monospace,monospace;font-weight:800}.bk-status{display:none;border-radius:14px;padding:10px 12px;font-size:.82rem;line-height:1.75;margin-top:12px}.bk-status.is-visible{display:block}.bk-status-error{background:#fff0f0;border:1px solid #ffd2d2;color:var(--bk-danger)}.bk-status-success{background:#eefaf1;border:1px solid #cdeed5;color:var(--bk-success)}.bk-status-info{background:#edf7fb;border:1px solid #d2eaf4;color:var(--bk-blue)}
.bk-login-tabs{display:flex;background:#edf4f7;border-radius:16px;padding:4px;margin-bottom:18px}.bk-login-tab{flex:1;border:0;background:transparent;border-radius:13px;padding:9px;font:inherit;font-weight:800;color:#677c86;cursor:pointer}.bk-login-tab.active{background:#fff;color:var(--bk-blue);box-shadow:0 3px 10px rgba(0,0,0,.08)}
.bk-username-status{font-size:.75rem;margin:6px 8px 0;min-height:18px}.bk-username-status.valid{color:var(--bk-success)}.bk-username-status.invalid{color:var(--bk-danger)}.bk-hint{display:block;color:var(--bk-muted);font-size:.73rem;margin:6px 8px 0;line-height:1.65}
.bk-resend-row{text-align:center;margin-top:14px;font-size:.82rem}.bk-resend-row button{border:0;background:transparent;color:var(--bk-blue);font:inherit;font-weight:750;cursor:pointer}.bk-resend-row button:disabled{color:#8a999f;cursor:not-allowed}.bk-timer{text-align:center;color:#b04f21;font-size:.78rem;min-height:20px;margin-top:5px}
.bk-login-note{font-size:.75rem;color:var(--bk-muted);text-align:center;line-height:1.8;border-top:1px solid #e8eef1;margin-top:18px;padding-top:13px}.bk-login-footer{text-align:center;color:rgba(255,255,255,.9);font-size:.75rem;line-height:2}.bk-login-footer a{color:#fff;text-decoration:none;margin:0 5px}.bk-login-footer a:hover{text-decoration:underline}
.bk-inline-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}.bk-confirm-icon{width:68px;height:68px;border-radius:22px;display:grid;place-items:center;margin:0 auto 12px;background:#fff0f0;font-size:2rem}
@media(max-width:390px){body.bk-login-page{padding:12px}.bk-login-card{border-radius:23px;padding:20px 16px}.bk-login-brand img{width:72px;height:72px}.bk-login-brand strong{font-size:1.45rem}.bk-field{padding:12px 13px}.bk-inline-actions{grid-template-columns:1fr}}
.bk-phone-mask-number{display:block;direction:ltr;unicode-bidi:isolate;text-align:left;letter-spacing:.03em;white-space:nowrap}