.auth-wrapper { width: 100%; max-width: 440px; position: relative; }
.auth-container {
    background: var(--white); border-radius: var(--radius);
    box-shadow: var(--shadow); overflow: hidden;
}

.auth-tabs { display: flex; border-bottom: 2px solid var(--border); position: relative; }
.auth-tab {
    flex: 1; padding: 16px; border: none; background: transparent; font-size: 1rem;
    font-weight: 600; cursor: pointer; transition: color var(--transition);
    color: var(--text-light); position: relative; z-index: 1;
}
.auth-tab.active { color: var(--primary); }
.auth-tab-indicator {
    position: absolute; bottom: -2px; height: 2px; background: var(--primary);
    transition: transform var(--transition), width var(--transition); z-index: 2;
    border-radius: 2px;
}

.auth-forms { position: relative; }

.auth-form {
    position: absolute; left: 0; right: 0; top: 0; padding: 28px 32px 24px;
    display: flex; flex-direction: column; gap: 20px;
    opacity: 0; transform: translateX(40px);
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none; z-index: 1;
}
.auth-form.active {
    position: relative; opacity: 1; transform: translateX(0);
    pointer-events: auto; z-index: 2;
}

.form-group { display: flex; flex-direction: column; gap: 16px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field label { font-size: 0.875rem; font-weight: 500; color: var(--text); }
.form-field input {
    padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 8px;
    font-size: 0.95rem; transition: border-color 0.2s ease, box-shadow 0.2s ease; outline: none;
}
.form-field input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(5, 94, 226, 0.15); }

.form-field input.strength-weak { border-color: #dc2626; box-shadow: 0 0 0 2px rgba(220,38,38,0.2); }
.form-field input.strength-medium { border-color: #ea580c; box-shadow: 0 0 0 2px rgba(234,88,12,0.2); }
.form-field input.strength-good { border-color: #65a30d; box-shadow: 0 0 0 2px rgba(101,163,13,0.2); }
.form-field input.strength-strong { border-color: var(--success); box-shadow: 0 0 0 2px rgba(22,163,74,0.2); }
.form-field input.match-ok { border-color: var(--success); box-shadow: 0 0 0 2px rgba(22,163,74,0.2); }
.form-field input.match-ko { border-color: var(--border); }
.form-field input.email-checking { border-color: #f59e0b; }
.form-field input.email-valid { border-color: var(--success); }
.form-field input.email-invalid { border-color: var(--error); }

.field-status { font-size: 0.8rem; min-height: 18px; line-height: 18px; transition: color 0.2s ease; }
.field-status.status-checking { color: #f59e0b; }
.field-status.status-valid { color: var(--success); }
.field-status.status-invalid { color: var(--error); }

.step-hint .hint-c { transition: color 0.25s ease; }
.step-hint .hint-c.hint-checked { color: var(--success); font-weight: 700; }

.steps-track { position: relative; overflow: visible; }
.step {
    position: absolute; left: -2px; right: -2px; top: 0; padding: 0 2px;
    display: flex; flex-direction: column; gap: 18px;
    opacity: 0; transform: translateX(36px);
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none; z-index: 1;
}
.step.active {
    opacity: 1; transform: translateX(0); pointer-events: auto; z-index: 2;
}

.step-hint { font-size: 0.8rem; color: var(--text-light); line-height: 1.4; }

.step-actions { display: flex; gap: 10px; }
.step-actions .step-next { flex: 1; }

.step-back {
    display: inline-flex; align-items: center; gap: 6px; padding: 13px 18px;
    background: var(--white); color: var(--text-light);
    border: 1.5px solid var(--border); border-radius: 8px; font-size: 0.9rem;
    font-weight: 500; cursor: pointer;
    transition: border-color var(--transition), color var(--transition), background var(--transition);
    white-space: nowrap;
}
.step-back:hover { border-color: var(--primary); color: var(--primary); background: #f8faff; }
.step-back i { font-size: 0.8rem; }

.step-next {
    padding: 13px; background: #9ca3af; color: var(--white); border: none;
    border-radius: 8px; font-size: 0.95rem; font-weight: 600; cursor: pointer;
    transition: background var(--transition), transform 0.2s ease, box-shadow 0.2s ease;
    overflow: hidden;
}
.step-next:not(:disabled) { background: var(--primary); }
.step-next:not(:disabled):hover {
    background: var(--primary-dark); transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(5, 94, 226, 0.3);
}
.step-next:disabled { cursor: not-allowed; opacity: 0.7; }
.step-next.loading { pointer-events: none; opacity: 0.8; }

.step-progress {
    display: flex; align-items: flex-start; gap: 0;
    margin: 6px 0 14px; position: relative;
}
.prog-step {
    display: flex; flex-direction: column; align-items: center;
    flex: 1; position: relative; gap: 6px;
}
.prog-step::before {
    content: ''; position: absolute; top: 17px;
    left: -50%; width: 100%; height: 2px;
    background: var(--border); z-index: 0;
    transition: background 0.4s ease;
}
.prog-step:first-child::before { display: none; }
.prog-step.done::before,
.prog-step.active::before { background: var(--primary); }

.prog-circle {
    width: 34px; height: 34px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem;
    border: 2px solid var(--border);
    background: var(--white); color: var(--text-light);
    position: relative; z-index: 1;
    transition: border-color 0.35s ease, background 0.35s ease, color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease;
}
.prog-step.done .prog-circle {
    background: linear-gradient(135deg, #033F99, var(--primary));
    color: var(--white); border-color: var(--primary);
    transform: scale(1.05);
}
.prog-step.active .prog-circle {
    border-color: var(--primary); color: var(--primary);
    box-shadow: 0 0 0 4px rgba(5, 94, 226, 0.15);
    animation: progPulse 1.8s ease-in-out infinite;
}
@keyframes progPulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(5, 94, 226, 0.12); }
    50% { box-shadow: 0 0 0 8px rgba(5, 94, 226, 0.06); }
}

.prog-label {
    font-size: 0.7rem; color: var(--text-light); font-weight: 500;
    letter-spacing: 0.02em; transition: color 0.3s ease;
}
.prog-step.done .prog-label { color: var(--primary); font-weight: 600; }
.prog-step.active .prog-label { color: var(--text); font-weight: 600; }

.auth-submit {
    width: 100%; padding: 14px; background: var(--primary); color: var(--white);
    border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: background var(--transition), transform 0.2s ease, box-shadow 0.2s ease;
    position: relative; overflow: hidden;
}
.auth-submit::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(to right, #033F99, var(--primary));
    opacity: 0; transition: opacity var(--transition);
}
.auth-submit:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(5,94,226,0.3); }
.auth-submit:hover:not(:disabled)::before { opacity: 1; }
.auth-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.auth-submit.loading { pointer-events: none; opacity: 0.85; }
.auth-submit span { position: relative; z-index: 1; }

.remember-field {
    display: flex; align-items: center; gap: 10px; cursor: pointer;
    font-size: 0.85rem; color: var(--text-light); user-select: none;
    margin: 4px 0 2px; position: relative;
}
.remember-field input { position: absolute; opacity: 0; width: 0; height: 0; }
.check-indicator {
    flex-shrink: 0; width: 20px; height: 20px; border-radius: 6px;
    border: 2px solid var(--border); background: var(--white);
    display: flex; align-items: center; justify-content: center;
    transition: border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
    position: relative;
}
.remember-field:hover .check-indicator { border-color: var(--primary); }
.remember-field input:checked + .check-indicator {
    border-color: var(--primary); background: var(--primary);
    box-shadow: 0 0 0 4px rgba(5,94,226,0.12);
}
.check-indicator::after {
    content: '\f00c'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
    font-size: 0.65rem; color: var(--white);
    transform: scale(0); transition: transform 0.2s ease;
}
.remember-field input:checked + .check-indicator::after { transform: scale(1); }
.remember-text { color: var(--text-light); transition: color 0.25s ease; }
.remember-field:hover .remember-text { color: var(--text); }

.auth-form-switch { text-align: center; font-size: 0.875rem; color: var(--text-light); cursor: pointer; }
.auth-form-switch span { color: var(--primary); font-weight: 600; }
.auth-form-switch:hover span { color: var(--primary-dark); text-decoration: underline; }

.auth-message {
    margin-top: 16px; padding: 12px 16px; border-radius: 8px; font-size: 0.9rem;
    display: none; animation: msgIn 0.3s ease;
}
@keyframes msgIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
.auth-message.error { display: block; background: #fef2f2; color: var(--error); border: 1px solid #fecaca; }
.auth-message.success { display: block; background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }

.fields-stagger .form-field {
    opacity: 0; transform: translateY(16px);
    transition: opacity 0.45s cubic-bezier(0.22, 1, 0.36, 1), transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
.fields-stagger.visible .form-field { opacity: 1; transform: translateY(0); }
.fields-stagger.visible .form-field:nth-child(1) { transition-delay: 0.04s; }
.fields-stagger.visible .form-field:nth-child(2) { transition-delay: 0.14s; }
.fields-stagger.visible .form-field:nth-child(3) { transition-delay: 0.24s; }
.fields-stagger.visible .form-field:nth-child(4) { transition-delay: 0.34s; }

@media (max-width: 480px) {
    .auth-form { padding: 24px 16px 20px; }
}