:root {
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
}

* {
    box-sizing: border-box;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: url("https://images.unsplash.com/photo-1519681393784-d120267933ba?q=80&w=2070&auto=format&fit=crop") center/cover fixed;
    color: white;
    padding: 24px;
}

.login-card {
    width: min(420px, 100%);
    padding: 32px;
    border-radius: 20px;
    background: rgba(30, 30, 40, .86);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(20px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.brand-icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, .15);
    font-weight: 800;
    font-size: 22px;
}

h1 {
    font-size: 1.6rem;
    margin: 0;
}

label {
    display: block;
    margin: 14px 0 6px;
    opacity: .86;
}

input {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, .2);
    background: rgba(0, 0, 0, .3);
    color: white;
    font-size: 1rem;
}

button {
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    border: 0;
    border-radius: 8px;
    background: #0078d4;
    color: white;
    font-weight: 700;
    cursor: pointer;
}

.alert {
    padding: 12px;
    border-radius: 8px;
    background: rgba(232, 17, 35, .22);
    border: 1px solid rgba(232, 17, 35, .5);
}