/* 共通スタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-red: #E60012;
    --soft-red: #FF4C4C;
    --pure-white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --text-gray: #757e87;
    --dark-gray: #5a646e;
    --accent-red: #dc3545;
    
    /* 書道感のある日本的配色 */
    --sumi-black: #2a2a2a;
    --deep-black: #1a1a1a;
    --charcoal: #3c3c3c;
    --ink-gray: #505050;
    --paper-white: #fefefe;
    --brush-red: #cc0000;
}

body {
    font-family: 'Noto Sans JP', 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.8;
    color: var(--dark-gray);
    background-color: var(--pure-white);
    overflow-x: hidden;
}

/* ヘッダー */
header {
    background: rgba(255, 255, 255, 0.95);
    color: var(--dark-gray);
    padding: 0.8rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    border-bottom: 2px solid var(--primary-red);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--dark-gray);
}

.main-logo {
    height: 60px;
    width: auto;
    transition: all 0.3s ease;
}

.main-logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 0 5px rgba(230, 0, 18, 0.4));
}

.company-name {
    font-family: 'Bebas Neue', 'Noto Sans JP', sans-serif;
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    line-height: 1.2;
    position: relative;
}

.company-name span {
    color: var(--brush-red);
    font-weight: 800;
    position: relative;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

nav a {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    position: relative;
    letter-spacing: 0.05em;
}

nav a:hover {
    color: var(--primary-red);
    background-color: var(--light-gray);
    transform: translateY(-2px);
}

/* フッター */
footer {
    background: var(--dark-gray);
    color: var(--pure-white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
    border-top: 3px solid var(--primary-red);
    box-shadow: 0 -2px 20px rgba(0,0,0,0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo {
    flex: 1;
}

.footer-logo-img {
    height: 80px;
    width: auto;
    opacity: 0.9;
}

/* ヒーローセクションのロゴに控えめな効果 */
.hero-logo-img {
    filter: drop-shadow(0 0 3px rgba(230, 0, 18, 0.3));
    transition: filter 0.3s ease;
}

.hero-logo-img:hover {
    filter: drop-shadow(0 0 6px rgba(230, 0, 18, 0.5));
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--pure-white);
    text-decoration: none;
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
    position: relative;
}

.footer-links a:hover {
    color: var(--primary-red);
    transform: translateY(-1px);
}

footer p {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--text-gray);
    color: var(--text-gray);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    /* ヘッダー調整 */
    header {
        padding: 0.5rem 0;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-logo {
        height: 50px;
    }
    
    .company-name {
        font-size: 1.4rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }
    
    nav a {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
    
    /* フッター調整 */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
        gap: 1rem;
    }
    
    .footer-logo-img {
        height: 60px;
    }
}

/* スマートフォン専用（480px以下） */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    /* さらに小さい画面での調整 */
    .main-logo {
        height: 40px;
    }
    
    .company-name {
        font-size: 1.2rem;
    }
    
    nav ul {
        gap: 0.3rem;
    }
    
    nav a {
        padding: 0.3rem 0.6rem;
        font-size: 0.8rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .footer-logo-img {
        height: 50px;
    }
}