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

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

body {
    align-items: center;
    color: #333;
    display: flex;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.welcome-card {
    background: #fff;
    border: 1px solid #dfe3e8;
    border-radius: 6px;
    max-width: 480px;
    padding: 36px;
    text-align: center;
    width: 100%;
}

.site-logo {
    height: 90px;
    margin-bottom: 10px;
    width: auto;
}

.header-title {
    color: #1e3c72;
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 6px;
}

.header-subtitle {
    color: #666;
    font-size: 14px;
}

.welcome-content {
    border-left: 3px solid #1e3c72;
    margin: 28px 0;
    padding: 18px 20px;
    text-align: left;
}

.welcome-content h2 {
    color: #1e3c72;
    font-size: 18px;
    margin-bottom: 10px;
}

.welcome-content p {
    color: #555;
    font-size: 14px;
    line-height: 1.6;
}

.login-guidance {
    color: #777;
    font-size: 13px;
    margin-top: 10px;
}

.btn-login {
    background: #1e3c72;
    border-radius: 4px;
    color: #fff;
    display: inline-block;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 32px;
    text-decoration: none;
}

.auth-actions {
    display: grid;
    gap: 10px;
}

.btn-register {
    background: #ffffff;
    border: 1px solid #1e3c72;
    border-radius: 4px;
    color: #1e3c72;
    display: inline-block;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 32px;
    text-decoration: none;
}

.btn-register:hover,
.btn-register:focus-visible {
    background: #f3f7ff;
}

.btn-login:hover,
.btn-login:focus-visible {
    background: #152a52;
}

.btn-login:focus-visible {
    outline: 3px solid rgba(30, 60, 114, 0.25);
    outline-offset: 3px;
}

.security-notice {
    background: #f5f7fa;
    border: 1px solid #e0e4e9;
    border-radius: 4px;
    color: #555;
    font-size: 12px;
    line-height: 1.5;
    margin-top: 28px;
    padding: 14px;
    text-align: left;
}

.security-notice strong {
    color: #1e3c72;
    display: block;
    margin-bottom: 4px;
}

.footer-info {
    border-top: 1px solid #e0e0e0;
    color: #777;
    font-size: 12px;
    margin-top: 28px;
    padding-top: 20px;
}

.footer-info p + p {
    margin-top: 5px;
}

.copyright {
    color: #999;
    margin-top: 12px;
}

.access-note {
    border-top: 1px solid #e0e0e0;
    color: #999;
    font-size: 11px;
    line-height: 1.5;
    margin-top: 20px;
    padding-top: 20px;
}

@media (max-width: 600px) {
    .welcome-card {
        padding: 28px 22px;
    }

    .btn-login {
        width: 100%;
    }

    .btn-register {
        width: 100%;
    }
}