.modal-overlay {
    position: fixed; inset: 0; z-index: 500;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 24px;
    pointer-events: none; opacity: 0;
    transition: opacity 0.22s ease;
}
.modal-overlay[aria-hidden="false"] { pointer-events: all; opacity: 1; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.58); }

.modal-container {
    position: relative;
    background: var(--bg-surface);
    border-radius: 16px;
    width: 90%; max-width: var(--max-width);
    max-height: 80dvh; overflow-y: auto;
    overscroll-behavior: contain; -webkit-overflow-scrolling: touch;
    transform: scale(0.95); opacity: 0;
    transition: transform 0.3s cubic-bezier(.4,0,.2,1), opacity 0.3s ease;
    scrollbar-width: none; z-index: 1;
}
.modal-container::-webkit-scrollbar { display: none; }
.modal-overlay[aria-hidden="false"] .modal-container { transform: scale(1); opacity: 1; }

.modal-close-outer {
    position: relative; z-index: 1; flex-shrink: 0;
    width: 42px; height: 42px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; border-radius: 50%;
    border: 2px solid #fff;
    background: transparent;
    transition: opacity 0.2s;
}
.modal-close-outer svg { width: 20px; height: 20px; }
.modal-close-outer:hover { opacity: .7; }

.modal-tabs {
    display: flex; border-bottom: 1.5px solid var(--border-light);
    padding: 0 14px; margin-top: 2px;
}
.modal-tab {
    flex: 1; display: flex; align-items: center; justify-content: center; gap: 5px;
    padding: 11px 6px; font-size: 0.9rem; font-weight: 600;
    color: var(--text-muted); border-bottom: 2.5px solid transparent;
    margin-bottom: -1.5px; transition: color var(--transition), border-color var(--transition);
    cursor: pointer;
}
.modal-tab svg { width: 16px; height: 16px; }
.modal-tab[aria-selected="true"] { color: var(--primary); border-bottom-color: var(--primary); }

.modal-body { padding: 12px 14px 20px; }
.modal-subtitle {
    font-size: 0.75rem; color: var(--primary); font-weight: 500; margin-bottom: 12px;
}

.auth-form { display: flex; flex-direction: column; gap: 10px; }
.form-field { position: relative; display: flex; align-items: center; }
.field-icon {
    position: absolute; left: 11px; color: var(--neutral-2);
    pointer-events: none; z-index: 1;
}
.field-icon svg { width: 16px; height: 16px; }

.form-field input {
    width: 100%; height: 44px;
    padding: 0 42px 0 38px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    color: var(--text-primary); font-size: 0.9rem; outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-field input::placeholder { color: var(--neutral-2); font-size: 0.8375rem; }
.form-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,108,255,.10);
}
.form-field input.error { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(255,0,0,.08); }

.field-error {
    position: absolute; bottom: -16px; left: 0;
    font-size: 0.6rem; color: var(--danger); font-weight: 500; display: none;
}
.field-error:not(:empty) { display: block; }

.field-toggle-pass {
    position: absolute; right: 11px; color: var(--neutral-2);
    display: flex; align-items: center; justify-content: center;
    width: 26px; height: 26px; z-index: 1;
    transition: color var(--transition);
}
.field-toggle-pass svg { width: 16px; height: 16px; }
.field-toggle-pass:hover { color: var(--primary); }

.password-strength { display: flex; align-items: center; gap: 7px; padding: 0 2px; }
.strength-label { font-size: 0.6875rem; color: var(--text-muted); flex-shrink: 0; }
.strength-bars { display: flex; gap: 3px; flex: 1; }
.strength-bar { flex: 1; height: 3px; background: var(--border); border-radius: 2px; transition: background 0.28s ease; }
.strength-bar.active-1 { background: var(--danger); }
.strength-bar.active-2 { background: var(--warning); }
.strength-bar.active-3 { background: #f39c12; }
.strength-bar.active-4 { background: var(--success); }

.field-note { font-size: 0.6875rem; color: var(--warning); font-weight: 500; margin-top: -4px; }

.form-checkbox { display: flex; align-items: flex-start; gap: 9px; cursor: pointer; padding: 2px 0; }
.form-checkbox input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; }
.checkbox-custom {
    flex-shrink: 0; width: 18px; height: 18px;
    border: 2px solid var(--border); border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition); background: var(--bg-surface); margin-top: 1px;
}
.form-checkbox input:checked ~ .checkbox-custom {
    background: var(--success); border-color: var(--success);
}
.form-checkbox input:checked ~ .checkbox-custom::after {
    content: ''; width: 5px; height: 8px;
    border: 2px solid #fff; border-top: none; border-left: none;
    transform: rotate(45deg) translateY(-1px); display: block;
}
.checkbox-label { font-size: 0.775rem; color: var(--text-secondary); line-height: 1.5; }
.checkbox-label a { color: var(--primary); font-weight: 500; }

.auth-submit-btn {
    height: 46px; border-radius: var(--radius-md);
    background: var(--primary); color: #fff; border: none;
    font-size: 0.9375rem; font-weight: 700; letter-spacing: .5px;
    display: flex; align-items: center; justify-content: center; gap: 7px;
    transition: filter var(--transition), transform var(--transition);
    box-shadow: 0 4px 14px rgba(0,108,255,.32); margin-top: 2px;
    cursor: pointer;
}
.auth-submit-btn:hover  { filter: brightness(1.07); }
.auth-submit-btn:active { transform: scale(.98); }
.auth-submit-btn:disabled { opacity: .6; pointer-events: none; }

.auth-support-link, .auth-forgot-link {
    color: var(--primary); font-size: 0.775rem; font-weight: 500;
    text-align: center; display: block; padding: 4px;
    transition: opacity var(--transition); cursor: pointer; text-decoration: none;
}
.auth-support-link:hover, .auth-forgot-link:hover { opacity: .7; }
.auth-links-row { display: flex; justify-content: space-between; gap: 7px; }

.auth-divider { display: flex; align-items: center; gap: 10px; color: var(--text-muted); font-size: 0.775rem; }
.auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }

.auth-social { display: flex; justify-content: center; gap: 14px; }
.social-btn {
    width: 46px; height: 46px; border-radius: 50%;
    border: 1.5px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
    cursor: pointer;
}
.social-btn svg { width: 22px; height: 22px; }
.social-btn:hover { border-color: var(--primary); box-shadow: 0 2px 8px rgba(0,108,255,.18); }
.social-btn--biometric svg { color: var(--primary); }