* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.16), transparent 34%),
        linear-gradient(135deg, #f8fafc 0%, #e0f2fe 50%, #eef2ff 100%);
    color: #0f172a;
}

.logout-page {
    visibility: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}


.logout-page.is-ready {
    visibility: visible;
}


.logout-card {
    width: 100%;
    max-width: 440px;
    padding: 40px 32px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: 24px;
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.14);
    text-align: center;
    backdrop-filter: blur(12px);
}

.logo-wrapper {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.18);
}

.logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.logout-card h1 {
    margin: 0 0 12px;
    font-size: 28px;
    line-height: 1.3;
    font-weight: 700;
    color: #0f172a;
}

.message {
    margin: 0 0 8px;
    font-size: 16px;
    line-height: 1.7;
    color: #334155;
}

.sub-message {
    margin: 0 0 28px;
    font-size: 14px;
    line-height: 1.7;
    color: #64748b;
}

.login-button {
    width: 100%;
    border: none;
    border-radius: 14px;
    padding: 14px 18px;
    font-size: 15px;
    font-weight: 700;
    color: #ffffff;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    cursor: pointer;
    box-shadow: 0 14px 28px rgba(37, 99, 235, 0.28);
    transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.login-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 34px rgba(37, 99, 235, 0.34);
}

.login-button:active {
    transform: translateY(0);
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.22);
}

.login-button i {
    margin-right: 8px;
}

@media (max-width: 480px) {
    .logout-card {
        padding: 32px 22px;
        border-radius: 20px;
    }

    .logout-card h1 {
        font-size: 24px;
    }
}