*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.auth {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    background: url("https://images.unsplash.com/photo-1554224155-6726b3ff858f?q=80&w=800&auto=format&fit=crop") no-repeat center center/cover;
    position: relative;
}

.auth::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    /* dark overlay */
    z-index: 0;
}
.auth .logo{
    background: #ffffff;
    display: inline-block;
    margin-bottom: 20px;
    border-radius: 10px;
}
/* Box */
.auth-box {
    width: 350px;
    padding: 30px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    text-align: center;
}

/* Toggle */
.auth-toggle {
    display: flex;
    margin-bottom: 20px;
}

.toggle-btn {
    flex: 1;
    padding: 8px;
    border: none;
    cursor: pointer;
    background: transparent;
    color: white;
    border-radius: 20px;
}

.toggle-btn.active {
    background: linear-gradient(135deg, #3b82f6, #6366f1);
}

/* Forms */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

/* Inputs */
.auth-form input {
    width: 100%;
    padding: 10px;
    margin-top: 12px;
    border-radius: 8px;
    border: none;
    outline: none;
}

/* Button */
.auth-form button {
    margin-top: 15px;
    padding: 10px;
    border-radius: 20px;
    border: none;
    background: linear-gradient(135deg, #3b82f6, #6366f1);
    color: white;
    cursor: pointer;
}

/* Success */
.success-msg {
    display: none;
    margin-top: 15px;
    color: #4ade80;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

.auth-box.shake {
    animation: shake 0.3s;
}