* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    font-family: Inter, Arial, sans-serif;
    color: #172033;
    background:
        radial-gradient(
            circle at top left,
            rgba(30, 64, 175, 0.18),
            transparent 36%
        ),
        linear-gradient(135deg, #eef3f9, #f8fafc);
}

.login-card {
    width: min(100%, 430px);
    padding: 38px;
    border: 1px solid #e2e8f0;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 30px;
}

.brand-icon {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    color: #ffffff;
    font-size: 22px;
    font-weight: 800;
    background: #1e40af;
}

.brand h1 {
    margin: 0;
    font-size: 21px;
}

.brand p {
    margin: 5px 0 0;
    color: #64748b;
    font-size: 14px;
}

.intro {
    margin-bottom: 25px;
}

.intro h2 {
    margin: 0 0 8px;
    font-size: 26px;
}

.intro p {
    margin: 0;
    color: #64748b;
    line-height: 1.5;
}

.alert {
    margin-bottom: 20px;
    padding: 13px 15px;
    border: 1px solid #fecaca;
    border-radius: 10px;
    color: #991b1b;
    background: #fef2f2;
    font-size: 14px;
}

.field {
    margin-bottom: 19px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 700;
}

input {
    width: 100%;
    height: 48px;
    padding: 0 14px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    outline: none;
    color: #172033;
    background: #ffffff;
    font-size: 16px;
}

input:focus {
    border-color: #1e40af;
    box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.12);
}

button {
    width: 100%;
    height: 50px;
    border: 0;
    border-radius: 10px;
    color: #ffffff;
    background: #1e40af;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
}

button:hover {
    background: #1e3a8a;
}

.footer {
    margin: 25px 0 0;
    color: #64748b;
    font-size: 13px;
    text-align: center;
}

@media (max-width: 480px) {
    .login-card {
        padding: 28px 22px;
    }
}