* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f3f6fa;
    color: #172033;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
}

header {
    background: #ffffff;
    border-bottom: 1px solid #dbe2ea;
}

.navbar {
    max-width: 980px;
    margin: auto;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    color: #1557b0;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
}

nav a {
    color: #344054;
    margin-left: 16px;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

main {
    max-width: 760px;
    margin: 40px auto;
    padding: 0 18px;
}

.card {
    background: #ffffff;
    padding: 32px;
    border: 1px solid #dbe2ea;
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(15, 32, 55, 0.07);
}

h1 {
    margin-top: 0;
    line-height: 1.25;
}

h2 {
    margin-top: 28px;
}

label {
    display: block;
    margin: 18px 0 6px;
    font-weight: bold;
}

input[type="text"],
input[type="tel"] {
    width: 100%;
    padding: 13px;
    border: 1px solid #aeb8c5;
    border-radius: 7px;
    font-size: 16px;
}

.consent-box {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-top: 24px;
    padding: 16px;
    background: #f7f9fc;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
}

.consent-box input {
    width: 20px;
    height: 20px;
    margin-top: 4px;
    flex-shrink: 0;
}

.consent-box label {
    margin: 0;
    font-weight: normal;
}

button,
.button {
    display: inline-block;
    margin-top: 22px;
    padding: 13px 20px;
    background: #1557b0;
    color: #ffffff;
    border: 0;
    border-radius: 7px;
    font-size: 16px;
    font-weight: bold;
    text-decoration: none;
    cursor: pointer;
}

button {
    width: 100%;
}

button:hover,
.button:hover {
    background: #10458c;
}

.error {
    padding: 13px;
    margin-bottom: 18px;
    color: #8b1e1e;
    background: #fff0f0;
    border: 1px solid #e79b9b;
    border-radius: 7px;
}

.success {
    padding: 18px;
    background: #ecfdf3;
    border: 1px solid #65c98a;
    border-radius: 8px;
}

.small {
    font-size: 14px;
    color: #566273;
}

.hidden-field {
    display: none;
}

footer {
    max-width: 760px;
    margin: 30px auto;
    padding: 20px;
    color: #667085;
    font-size: 14px;
    text-align: center;
}

footer a {
    color: #1557b0;
}

@media (max-width: 650px) {
    .navbar {
        display: block;
    }

    nav {
        margin-top: 10px;
    }

    nav a {
        margin: 0 12px 0 0;
    }

    .card {
        padding: 22px;
    }
}