* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    background: #f1f5f9;
    color: #0f172a;
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Arial,
        sans-serif;
}

.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 36px;
    background: #fff;
    border: 1px solid #cbd5e1;
    border-radius: 14px;
    box-shadow:
        0 18px 45px
        rgba(15, 23, 42, 0.12);
}

.brand-mark {
    display: flex;
    width: 54px;
    height: 54px;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    border-radius: 12px;
    background: #0f172a;
    color: #fff;
    font-size: 21px;
    font-weight: 700;
}

h1 {
    margin: 0;
    font-size: 30px;
}

.subtitle {
    margin: 5px 0 28px;
    color: #64748b;
}

label {
    display: block;
    margin: 18px 0 7px;
    font-weight: 600;
}

input {
    width: 100%;
    min-height: 46px;
    padding: 10px 12px;
    border: 1px solid #94a3b8;
    border-radius: 8px;
    background: #fff;
    color: #0f172a;
    font: inherit;
}

input:focus {
    outline:
        3px solid
        rgba(14, 165, 233, 0.22);

    border-color: #0284c7;
}

button {
    width: 100%;
    min-height: 48px;
    margin-top: 24px;
    border: 0;
    border-radius: 8px;
    background: #0f172a;
    color: #fff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

button:hover {
    background: #1e293b;
}

.error {
    margin: 18px 0;
    padding: 12px;
    border: 1px solid #fecaca;
    border-radius: 8px;
    background: #fef2f2;
    color: #991b1b;
}

.footer {
    margin: 28px 0 0;
    color: #94a3b8;
    font-size: 13px;
    text-align: center;
}