.auth-body { overflow-x: hidden; }

.auth-shell {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
}

/* ===== Left: illustration/visual panel ===== */
.auth-visual {
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #0d0a1f 0%, #150f2e 50%, #0a1420 100%);
    padding: var(--space-7);
    display: flex;
    flex-direction: column;
}
[data-theme="light"] .auth-visual { background: linear-gradient(160deg, #eef0ff 0%, #f3ecff 50%, #e8f7fb 100%); }
.auth-visual .blob-field { position: absolute; }
.auth-logo { position: relative; z-index: 2; color: #fff; }
[data-theme="light"] .auth-logo { color: var(--color-text); }

.auth-visual-content {
    position: relative;
    z-index: 2;
    margin: auto 0 var(--space-8);
    max-width: 420px;
}
.auth-visual-content h2 { font-size: var(--fs-3xl); color: #fff; margin-bottom: var(--space-3); }
[data-theme="light"] .auth-visual-content h2 { color: var(--color-text); }
.auth-visual-content p { color: rgba(255, 255, 255, 0.7); font-size: var(--fs-base); margin-bottom: var(--space-7); }
[data-theme="light"] .auth-visual-content p { color: var(--color-text-muted); }

.auth-float-cards { display: flex; flex-direction: column; gap: var(--space-4); }
.auth-float-cards .float-card { position: static; min-width: 0; }
.auth-float-cards .float-card:hover { transform: translateY(-3px); }

/* ===== Right: form panel ===== */
.auth-main {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-7) var(--space-5);
}
.auth-theme-toggle { position: absolute; top: var(--space-6); right: var(--space-6); }

.auth-card {
    width: 100%;
    max-width: 420px;
    padding: var(--space-7);
}
.auth-card-head { text-align: center; margin-bottom: var(--space-6); }
.auth-card-head h1 { font-size: var(--fs-2xl); margin-bottom: var(--space-2); }
.auth-card-head p { font-size: var(--fs-sm); }

.divider { display: flex; align-items: center; gap: var(--space-3); margin: var(--space-6) 0; color: var(--color-text-faint); font-size: var(--fs-xs); }
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: var(--color-border); }

.social-auth { display: flex; flex-direction: column; gap: var(--space-3); }

.auth-switch { text-align: center; font-size: var(--fs-sm); margin-top: var(--space-6); color: var(--color-text-muted); }

/* Submit button loading / success states */
.btn-submit { position: relative; }
.btn-submit .btn-spinner {
    display: none;
    width: 16px; height: 16px;
    border: 2px solid rgba(26, 22, 8, 0.25);
    border-top-color: var(--color-on-primary);
    border-radius: 50%;
}
.btn-submit.is-loading .btn-spinner { display: inline-block; animation: spin 0.7s linear infinite; }
.btn-submit.is-loading .btn-label { opacity: 0.6; }
.btn-submit.is-success { background: var(--color-accent-alt); }

.form-alert {
    display: none;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-5);
}
.form-alert.is-visible { display: flex; animation: slideDown 0.35s var(--ease-out); }
.form-alert.error { background: rgba(244, 63, 94, 0.1); border: 1px solid rgba(244, 63, 94, 0.3); color: #fca5b5; }
.form-alert.success { background: rgba(52, 211, 153, 0.1); border: 1px solid rgba(52, 211, 153, 0.3); color: #6ee7b7; }

/* ===== OTP boxes ===== */
.otp-row { display: flex; gap: var(--space-3); justify-content: center; margin-bottom: var(--space-5); }
.otp-box {
    width: 52px; height: 60px;
    text-align: center;
    font-size: var(--fs-2xl);
    font-weight: 700;
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    transition: border-color var(--dur-base), box-shadow var(--dur-base), transform var(--dur-fast) var(--ease-spring);
}
.otp-box:focus {
    outline: none;
    border-color: var(--color-primary-alt);
    box-shadow: 0 0 0 4px rgba(255, 207, 64, 0.15);
    transform: translateY(-2px);
}
.otp-box.is-filled { border-color: var(--color-border-strong); }
.otp-timer { text-align: center; font-size: var(--fs-sm); color: var(--color-text-faint); margin-bottom: var(--space-6); }
.otp-timer .resend-link { color: var(--color-primary-alt); font-weight: 600; cursor: pointer; }
.otp-timer .resend-link.is-disabled { color: var(--color-text-faint); cursor: not-allowed; pointer-events: none; }

/* ===== Success state (checkmark) ===== */
.success-state { text-align: center; padding: var(--space-6) 0; }
.success-check {
    width: 72px; height: 72px;
    margin: 0 auto var(--space-5);
    border-radius: 50%;
    background: rgba(52, 211, 153, 0.12);
    border: 1px solid rgba(52, 211, 153, 0.3);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-accent-alt);
    animation: zoomIn 0.5s var(--ease-spring) both;
}
.success-state h2 { font-size: var(--fs-xl); margin-bottom: var(--space-3); }
.success-state p { font-size: var(--fs-sm); margin-bottom: var(--space-6); }

/* ===== Multi-step register ===== */
.step-indicator { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-7); }
.step-indicator .step-dot {
    flex: 1;
    height: 4px;
    border-radius: var(--radius-full);
    background: var(--color-border);
    position: relative;
    overflow: hidden;
}
.step-indicator .step-dot::after {
    content: '';
    position: absolute; inset: 0;
    background: var(--gradient-brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--dur-slow) var(--ease-out);
}
.step-indicator .step-dot.is-active::after,
.step-indicator .step-dot.is-done::after { transform: scaleX(1); }

.form-step { display: none; }
.form-step.is-active { display: block; animation: slideRight 0.4s var(--ease-out) both; }

.step-title { font-size: var(--fs-lg); font-weight: 700; margin-bottom: var(--space-1); }
.step-subtitle { font-size: var(--fs-sm); margin-bottom: var(--space-6); }

.upload-drop {
    border: 1.5px dashed var(--color-border-strong);
    border-radius: var(--radius-md);
    padding: var(--space-7) var(--space-5);
    text-align: center;
    cursor: pointer;
    transition: border-color var(--dur-base), background var(--dur-base);
    margin-bottom: var(--space-5);
}
.upload-drop:hover, .upload-drop.is-dragover { border-color: var(--color-primary-alt); background: rgba(255, 207, 64, 0.06); }
.upload-drop svg { color: var(--color-primary-alt); margin: 0 auto var(--space-3); }
.upload-drop .upload-title { font-weight: 600; font-size: var(--fs-sm); margin-bottom: var(--space-1); }
.upload-drop .upload-hint { font-size: var(--fs-xs); color: var(--color-text-faint); }
.upload-filename { font-size: var(--fs-sm); color: var(--color-accent-alt); margin-top: var(--space-2); display: none; }

.step-actions { display: flex; gap: var(--space-3); margin-top: var(--space-6); }
.step-actions .btn { flex: 1; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .auth-shell { grid-template-columns: 1fr; }
    .auth-visual { display: none; }
    .auth-main { padding: var(--space-9) var(--space-4) var(--space-6); }
}