.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: 40px 20px;
}

.auth-card {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 440px;
}

.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 30px;
    border-bottom: 2px solid rgba(99, 102, 241, 0.2);
}

.auth-tab {
    flex: 1;
    padding: 12px;
    background: none;
    border: none;
    color: var(--gray, #64748b);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.auth-tab.active {
    color: var(--primary, #6366f1);
    border-bottom-color: var(--primary, #6366f1);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--light, #f8fafc);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    color: var(--light, #f8fafc);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary, #6366f1);
}

.form-message {
    margin-top: 12px;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.9rem;
    text-align: center;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.form-message.success {
    background: rgba(74, 222, 128, 0.2);
    color: #86efac;
}

.btn-full {
    width: 100%;
    padding: 14px;
    font-size: 1rem;
    margin-top: 8px;
}