* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f5f8;
    color: #222;
}

.topbar {
    height: 6px;
    background: #2b295c;
}

header {
    height: 76px;
    background: #ffffff;
    border-bottom: 1px solid #e5e6eb;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 7%;
}

.brand {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: .4px;
    color: #2b295c;
}

.secure {
    font-size: 13px;
    color: #686b76;
}

main {
    min-height: calc(100vh - 82px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.card {
    width: 100%;
    max-width: 480px;
    background: #ffffff;
    border-radius: 5px;
    padding: 42px 44px;
    border: 1px solid #e1e2e7;
    box-shadow: 0 12px 35px rgba(0, 0, 0, .07);
}

.icon {
    width: 54px;
    height: 54px;
    margin: 0 auto 22px;
    border-radius: 50%;
    background: #ebeaf5;
    color: #2b295c;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 25px;
}

h1 {
    margin: 0;
    text-align: center;
    font-size: 26px;
    font-weight: 600;
    color: #25243f;
}

.intro {
    text-align: center;
    color: #686b76;
    line-height: 1.6;
    font-size: 15px;
    margin: 14px 0 28px;
}

.captcha {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.error {
    background: #fff1f1;
    border: 1px solid #f1c4c4;
    color: #a32626;
    padding: 11px 13px;
    border-radius: 4px;
    font-size: 14px;
    margin-bottom: 18px;
    text-align: center;
}

button {
    width: 100%;
    border: 0;
    border-radius: 4px;
    background: #2b295c;
    color: #ffffff;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s ease;
}

button:hover {
    background: #211f49;
}

.footer {
    text-align: center;
    margin-top: 25px;
    color: #8a8c96;
    font-size: 12px;
    line-height: 1.5;
}

@media (max-width: 600px) {
    header {
        padding: 0 20px;
    }

    .brand {
        font-size: 20px;
    }

    .secure {
        display: none;
    }

    .card {
        padding: 32px 22px;
    }

    h1 {
        font-size: 23px;
    }
}