:root {
    --blue: #155eef;
    --blue-dark: #102a56;
    --text: #24324a;
    --muted: #667085;
    --bg: #f7faff;
    --border: #dce7f5;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    color: var(--text);
    background:
        linear-gradient(
            180deg,
            #eef6ff 0%,
            #ffffff 320px
        );
    line-height: 1.65;
}

header {
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: 1040px;
    margin: auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    height: 46px;
    max-width: 180px;
    object-fit: contain;
}

.back {
    color: var(--blue);
    text-decoration: none;
    font-weight: 700;
}

main {
    max-width: 920px;
    margin: 48px auto 80px;
    padding: 0 22px;
}

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 38px;
    box-shadow: 0 18px 50px rgba(39, 82, 140, .08);
}

h1 {
    color: var(--blue-dark);
    margin-top: 0;
    line-height: 1.2;
}

h2 {
    color: var(--blue-dark);
    margin-top: 34px;
}

a {
    color: var(--blue);
}

.notice {
    margin: 22px 0;
    padding: 18px 20px;
    border-radius: 14px;
    background: #edf5ff;
    border: 1px solid #cfe2ff;
}

.small {
    color: var(--muted);
    font-size: .94rem;
}

footer {
    text-align: center;
    color: var(--muted);
    padding: 30px 20px 45px;
}

footer a {
    margin: 0 8px;
}

@media (max-width: 640px) {
    .card {
        padding: 24px;
    }

    .header-inner {
        padding: 14px 18px;
    }
}