.sb-auth-stage{min-height:calc(100vh - 160px);display:grid;place-items:center;padding:clamp(18px,4vw,48px);position:relative;overflow:hidden}.sb-auth-stage::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 18% 10%,rgba(34,211,238,.22),transparent 34%),radial-gradient(circle at 86% 8%,rgba(168,85,247,.24),transparent 32%),radial-gradient(circle at 50% 100%,rgba(244,114,182,.15),transparent 42%);pointer-events:none}.sb-auth-card{width:min(980px,100%);display:grid;grid-template-columns:minmax(260px,.85fr) minmax(320px,1fr);gap:clamp(18px,3vw,30px);align-items:stretch;position:relative;z-index:1}.sb-auth-card-wide{width:min(1120px,100%)}.sb-auth-intro,.sb-auth-form{border:1px solid rgba(255,255,255,.16);border-radius:34px;background:rgba(8,12,34,.72);backdrop-filter:blur(18px);box-shadow:0 24px 80px rgba(0,0,0,.28)}.sb-auth-intro{padding:clamp(22px,4vw,34px);color:#fff;display:flex;flex-direction:column;justify-content:center}.sb-auth-intro h1{margin:.25rem 0 .8rem;font-size:clamp(2rem,4vw,4rem);line-height:.96;letter-spacing:-.05em}.sb-auth-intro p{color:#dbeafe;line-height:1.65}.sb-auth-form{padding:clamp(18px,3vw,28px);display:grid;gap:16px}.sb-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.sb-form-grid.compact{margin-top:12px}.sb-form-grid .full{grid-column:1/-1}.sb-auth-form label,.sb-block-label{display:grid;gap:7px;min-width:0}.sb-auth-form label span,.sb-block-label span{color:#e0e7ff;font-weight:850;font-size:.92rem}.sb-auth-form input,.sb-auth-form select,.sb-auth-form textarea{width:100%;min-width:0;border:1px solid rgba(148,163,184,.28);border-radius:18px;padding:13px 14px;background:rgba(255,255,255,.92);color:#0f172a;outline:none}.sb-auth-form input:focus,.sb-auth-form select:focus,.sb-auth-form textarea:focus{border-color:rgba(34,211,238,.85);box-shadow:0 0 0 4px rgba(34,211,238,.18)}.sb-auth-form small{color:#fecaca;font-weight:700}.sb-auth-status{border:1px solid rgba(34,197,94,.35);border-radius:18px;padding:12px 14px;color:#bbf7d0;background:rgba(34,197,94,.1);font-weight:800}.sb-role-dynamic-panel{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:16px;border:1px solid rgba(34,211,238,.24);border-radius:26px;background:radial-gradient(circle at 100% 0%,rgba(34,211,238,.16),transparent 34%),rgba(255,255,255,.06);color:#fff;animation:sbPanelIn .28s ease both}.sb-role-dynamic-panel .sb-form-grid,.sb-role-dynamic-panel .sb-block-label{grid-column:1/-1}.sb-role-dynamic-panel h2{margin:0 0 .3rem}.sb-role-dynamic-panel p{margin:0;color:#dbeafe;line-height:1.55}.sb-panel-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:18px;background:linear-gradient(135deg,rgba(124,58,237,.85),rgba(34,211,238,.72));font-size:1.45rem}.is-hidden{display:none!important}@keyframes sbPanelIn{from{opacity:0;transform:rotateX(-8deg) translateY(8px)}to{opacity:1;transform:rotateX(0) translateY(0)}}.sb-check-row{display:flex!important;grid-template-columns:none!important;align-items:center;gap:10px!important;color:#e5e7eb}.sb-check-row input{width:18px;height:18px}.sb-auth-submit{border:0;border-radius:999px;padding:14px 18px;color:#fff;font-weight:950;cursor:pointer;background:linear-gradient(135deg,#7c3cff,#22d3ee);box-shadow:0 18px 36px rgba(34,211,238,.22)}.sb-auth-submit:hover{transform:translateY(-2px)}.sb-auth-switch{margin:0;text-align:center;color:#dbeafe}.sb-auth-switch a{color:#a5f3fc;font-weight:900}.sb-auth-flip-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px;perspective:800px}.sb-auth-flip-grid.small{grid-template-columns:1fr}.sb-auth-flip-grid article{min-height:130px;padding:14px;border:1px solid rgba(255,255,255,.14);border-radius:22px;background:rgba(255,255,255,.07);transition:transform .35s ease,border-color .25s ease,background .25s ease}.sb-auth-flip-grid article.is-active,.sb-auth-flip-grid article:hover{transform:rotateY(-6deg) translateY(-3px);border-color:rgba(34,211,238,.45);background:rgba(34,211,238,.10)}.sb-auth-flip-grid span{font-size:1.65rem}.sb-auth-flip-grid strong{display:block;margin-top:8px}.sb-auth-flip-grid p{margin:6px 0 0;font-size:.9rem}@media(max-width:880px){.sb-auth-card{grid-template-columns:1fr}}@media(max-width:620px){.sb-form-grid,.sb-auth-flip-grid{grid-template-columns:1fr}.sb-auth-stage{padding:12px}.sb-auth-intro,.sb-auth-form{border-radius:24px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}


/* === StudyBuddy visible auth errors === */
.sb-auth-error-summary {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: flex-start;
    border: 1px solid rgba(248, 113, 113, .55);
    border-radius: 22px;
    padding: 14px 16px;
    margin: 4px 0 6px;
    color: #fee2e2;
    background:
        radial-gradient(circle at 0% 0%, rgba(248, 113, 113, .20), transparent 34%),
        rgba(127, 29, 29, .30);
    box-shadow:
        0 0 0 4px rgba(248, 113, 113, .10),
        0 20px 44px rgba(127, 29, 29, .22);
}

.sb-auth-error-icon {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 999px;
    color: #450a0a;
    background: #fecaca;
    font-weight: 950;
}

.sb-auth-error-summary strong {
    display: block;
    color: #ffffff;
    font-weight: 950;
    margin-bottom: 6px;
}

.sb-auth-error-summary ul {
    margin: 0;
    padding-left: 18px;
}

.sb-auth-error-summary li {
    margin: 4px 0;
    color: #fecaca;
    font-weight: 800;
    line-height: 1.45;
}

.sb-auth-form small {
    display: block;
    margin-top: 6px;
    border: 1px solid rgba(248, 113, 113, .42);
    border-radius: 14px;
    padding: 8px 10px;
    color: #fecaca !important;
    background: rgba(127, 29, 29, .22);
    font-size: .82rem;
    font-weight: 900;
    line-height: 1.35;
}

.sb-auth-form small::before {
    content: "⚠ ";
}

.sb-auth-form label:has(small) input,
.sb-auth-form label:has(small) select,
.sb-auth-form label:has(small) textarea {
    border-color: rgba(248, 113, 113, .85) !important;
    background: rgba(254, 226, 226, .96) !important;
    color: #450a0a !important;
    box-shadow:
        0 0 0 4px rgba(248, 113, 113, .16),
        0 14px 34px rgba(127, 29, 29, .16) !important;
}

.sb-auth-form input:invalid:not(:placeholder-shown),
.sb-auth-form textarea:invalid:not(:placeholder-shown) {
    border-color: rgba(251, 146, 60, .70);
}

.sb-auth-form input:focus,
.sb-auth-form select:focus,
.sb-auth-form textarea:focus {
    outline: none;
    border-color: rgba(34, 211, 238, .90) !important;
    box-shadow:
        0 0 0 4px rgba(34, 211, 238, .18),
        0 18px 42px rgba(2, 6, 23, .18) !important;
}

.sb-auth-form label:has(small) span {
    color: #fecaca !important;
}

.sb-auth-status,
.sb-auth-alert.good {
    border: 1px solid rgba(34, 197, 94, .48);
    border-radius: 18px;
    padding: 12px 14px;
    color: #bbf7d0;
    background: rgba(20, 83, 45, .28);
    box-shadow: 0 0 0 4px rgba(34, 197, 94, .10);
    font-weight: 850;
}

@media (max-width: 620px) {
    .sb-auth-error-summary {
        grid-template-columns: 1fr;
    }

    .sb-auth-error-icon {
        width: 30px;
        height: 30px;
    }
}
/* === End StudyBuddy visible auth errors === */