:root {
    --primary: #0D47A1;
    --primary-light: #1E88E5;
    --accent: #D81B60;
    --text-main: #2D3748;
    --text-muted: #4A5568;
    --bg-light: #F7FAFC;
    --white: #FFFFFF;
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- Header --- */
header {
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
    padding: 1rem 5%;
    display: flex;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 36px;
    width: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* --- Footer --- */
footer {
    background: #1A202C;
    color: var(--white);
    padding: 4rem 5% 2rem;
    text-align: center;
}

.footer-logo-image {
    height: 48px;
    width: auto;
    margin-bottom: 1rem;
    display: inline-block;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--white);
}

.copyright {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .footer-links {
        gap: 1rem;
        flex-direction: column;
    }
}