:root {
    --blue-dark: #123b63;
    --blue-main: #1f5f96;
    --blue-light: #eef5fa;
    --text-dark: #24313d;
    --text-soft: #6b7784;
    --white: #ffffff;
    --border: #d9e4ee;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, Arial, Helvetica, sans-serif;
    color: var(--text-dark);
    background: linear-gradient(
        135deg,
        #f8fbfd 0%,
        #eef5fa 55%,
        #ffffff 100%
    );
}

main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 50px 20px;
}

.content {
    width: 100%;
    max-width: 900px;
    text-align: center;
}

.brand {
    margin-bottom: 32px;
    color: var(--blue-main);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.accent-line {
    width: 54px;
    height: 3px;
    margin: 0 auto 36px;
    border-radius: 3px;
    background: var(--blue-main);
}

h1 {
    margin-bottom: 24px;
    color: var(--blue-dark);
    font-size: clamp(38px, 5vw, 62px);
    font-weight: 600;
    line-height: 1.12;
    letter-spacing: -0.02em;
}

.subtitle {
    margin-bottom: 42px;
    color: var(--text-dark);
    font-size: clamp(19px, 2.3vw, 26px);
    font-weight: 400;
    line-height: 1.5;
}

.notice {
    display: inline-block;
    max-width: 620px;
    padding: 25px 34px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.82);
    box-shadow: 0 10px 30px rgba(18, 59, 99, 0.06);
}

.notice p {
    color: var(--text-soft);
    font-size: 17px;
    line-height: 1.7;
}

footer {
    padding: 24px 20px 30px;
    text-align: center;
    color: var(--text-soft);
    font-size: 14px;
}

footer a {
    margin: 0 9px;
    color: var(--blue-main);
    text-decoration: none;
}

footer a:hover,
footer a:focus {
    text-decoration: underline;
}

.copyright {
    margin-top: 11px;
    color: #8a96a1;
    font-size: 13px;
}

@media (max-width: 600px) {
    main {
        padding: 35px 18px;
    }

    .brand {
        margin-bottom: 26px;
        font-size: 15px;
    }

    .accent-line {
        margin-bottom: 30px;
    }

    .subtitle {
        margin-bottom: 32px;
    }

    .notice {
        padding: 22px 20px;
    }
}