:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --glass: rgba(255, 255, 255, 0.85);
    --border: rgba(255, 255, 255, 0.4);
    --text-dark: #1e293b;
    --text-gray: #64748b;
}

body,
html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Outfit', sans-serif;
    overflow: hidden;
}

#vanta-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.back-to-site {
    position: fixed;
    top: 30px;
    left: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    z-index: 100;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.back-to-site:hover {
    transform: translateX(-5px);
    background: #fff;
    color: var(--primary);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.login-wrapper {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--glass);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border);
    width: 100%;
    max-width: 400px;
    padding: 50px 40px;
    border-radius: 28px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    text-align: center;
    position: relative;
}

.brand-logo {
    font-weight: 800;
    font-size: 1.6rem;
    color: var(--primary);
    letter-spacing: -1px;
    margin-bottom: 5px;
    display: block;
    text-decoration: none;
}

.card-subtitle {
    color: var(--text-gray);
    font-size: 0.95rem;
    margin-bottom: 35px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.alert-box {
    background: #fee2e2;
    color: #b91c1c;
    padding: 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    margin-bottom: 25px;
    border: 1px solid #fecaca;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
    text-align: left;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    font-size: 1.2rem;
}

.input-group input {
    width: 100%;
    padding: 14px 15px 14px 45px;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid transparent;
    border-radius: 14px;
    font-size: 1rem;
    color: var(--text-dark);
    box-sizing: border-box;
    transition: all 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.btn-login {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: #fff;
    border: none;
    border-radius: 14px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(79, 70, 229, 0.4);
}

.footer-info {
    margin-top: 30px;
    font-size: 0.8rem;
    color: var(--text-gray);
}

@media (max-width: 768px) {
    .back-to-site {
        top: 15px;
        left: 15px;
        padding: 10px;
    }

    .back-to-site span {
        display: none;
    }
}

.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}