* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: #f2f4f7;
    color: #1f2937;
    font-family: Arial, sans-serif;
}

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

.login-panel {
    width: min(100%, 380px);
    padding: 32px;
    background: #ffffff;
    border: 1px solid #d9dee7;
    border-radius: 8px;
    box-shadow: 0 16px 35px rgba(31, 41, 55, 0.12);
}

.brand-logo {
    display: block;
    width: min(220px, 100%);
    height: auto;
    margin: 0 auto 28px;
    object-fit: contain;
}

.login-panel h1 {
    margin: 0;
    font-size: 1.55rem;
    line-height: 1.2;
}

.login-panel p {
    margin: 8px 0 24px;
    color: #5f6b7a;
}

.login-panel label {
    display: block;
    margin-bottom: 16px;
    font-weight: 700;
}

.login-panel input {
    width: 100%;
    margin-top: 8px;
    padding: 11px 12px;
    border: 1px solid #b9c2cf;
    border-radius: 6px;
    font: inherit;
}

.login-panel input:focus {
    border-color: #4138eb;
    outline: 3px solid rgba(65, 56, 235, 0.16);
}

.login-panel button {
    width: 100%;
    padding: 12px 16px;
    border: 0;
    border-radius: 6px;
    background: #4138eb;
    color: #ffffff;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.error {
    margin-bottom: 18px;
    padding: 10px 12px;
    border: 1px solid #efb4b4;
    border-radius: 6px;
    background: #fff0f0;
    color: #9a1c1c;
}