* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background: #430b7a;
    color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}


.auth-container {
    width: 100%;
    max-width: 450px; 
    padding: 20px;
    position: relative;
}

.back-button {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 999;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    text-decoration: none;
    border-radius: 8px;
    padding: 6px;
}

.back-button img {
    width: 28px;
    height: 28px;
    display: block;
}

.card {
    width: 100%;
    max-width: 1100px;
    background: transparent; 
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    padding: 32px;
}

.card-title {
    font-size: clamp(20px, 3.2vw, 36px);
    line-height: 1.1;
    text-align: center;
    font-weight: 600;
}


.options-wrapper {
    width: 100%;
    max-width: 720px;
    display: flex;
    flex-direction: column; 
    gap: 20px;
    align-items: center;
}

.option-button {
    width: 100%;
    max-width: 720px;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 22px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.08);
    color: #fff;
    text-decoration: none;
    border-radius: 12px;
    transition: transform 0.12s ease, background 0.12s;
    justify-content: center;
    font-weight: 500;
    font-size: 1rem;
}

.option-button img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    display: inline-block;
}

.option-button:hover {
    transform: translateY(-3px);
    background: rgba(255,255,255,0.12);
}

.brand-logo {
    width: clamp(120px, 18vw, 220px);
    height: auto;
    margin-top: 12px;
    opacity: 0.95;
}


@media (min-width: 1200px) {
    .card {
        padding: 48px;
        gap: 40px;
    }
    .options-wrapper {
        max-width: 900px;
    }

    .back-button {
        display: none;
    }
}