/* シックな昭和カラーパレット */
:root {
    --bg-black: #121212;      /* 深い黒（背景） */
    --classic-sepia: #c8b6a6; /* 文字・アクセントのセピア色 */
    --dark-brown: #322c2b;    /* 濃い茶色の枠線 */
    --ivory-white: #f1dec9;   /* 生成り色（補助） */
    --text-muted: #8d7b68;    /* くすんだ茶色（補足テキスト） */
    --font-serif: 'Shippori Mincho', serif;
}

/* 基本リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-black);
    color: var(--classic-sepia);
    font-family: var(--font-serif);
    line-height: 2;
    font-size: 18px;
    letter-spacing: 0.08em;
}

/* ヘッダー：シックなバーデザイン */
header {
    height: 80px;
    background-color: rgba(18, 18, 18, 0.95);
    border-bottom: 1px solid var(--dark-brown);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--classic-sepia);
}

.logo span {
    font-size: 1rem;
    color: var(--text-muted);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 40px;
}

nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.9rem;
    transition: color 0.4s;
}

nav a:hover {
    color: var(--classic-sepia);
}

/* ヒーロー：静寂な雰囲気 */
.hero-classic {
    padding: 80px 40px;
    display: flex;
    justify-content: center;
}

.hero-frame {
    max-width: 1100px;
    display: flex;
    align-items: stretch;
    background-color: var(--dark-brown);
    border: 1px solid var(--classic-sepia);
    padding: 10px;
}

.hero-image {
    flex: 1.2;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.1); /* モノクロ加工 */
}

.hero-content {
    flex: 1;
    padding: 60px;
    background-color: var(--bg-black);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 30px;
    color: var(--ivory-white);
    border-left: 1px solid var(--classic-sepia);
    padding-left: 20px;
}

/* アーカイブセクション：スプリットレイアウト */
.archive-section {
    padding: 120px 0;
    background-image: radial-gradient(var(--dark-brown) 1px, transparent 1px);
    background-size: 30px 30px; /* 粒状感の演出 */
}

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

.archive-item {
    display: flex;
    align-items: center;
    gap: 100px;
}

.archive-text {
    flex: 1;
    padding-left: 40px;
}

.year {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 20px;
    letter-spacing: 0.3em;
}

.archive-text h2 {
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: var(--ivory-white);
}

.archive-visual {
    flex: 1.5;
    position: relative;
    padding: 20px;
    background-color: var(--dark-brown);
}

.archive-visual img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    filter: sepia(0.6);
}

.sepia-filter {
    position: absolute;
    top: 20px; left: 20px; right: 20px; bottom: 20px;
    background-color: rgba(200, 182, 166, 0.1);
    pointer-events: none;
}

/* ギャラリー：額縁のようなグリッド */
.gallery-section {
    padding: 100px 40px;
    background-color: #0a0a0a;
}

.gallery-header {
    text-align: center;
    margin-bottom: 80px;
}

.gallery-header h2 {
    display: inline-block;
    border-bottom: 1px solid var(--classic-sepia);
    padding-bottom: 10px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.gallery-item {
    text-align: center;
}

.gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border: 5px solid var(--dark-brown);
    margin-bottom: 20px;
    filter: grayscale(100%);
    transition: 0.5s;
}

.gallery-item img:hover {
    filter: sepia(0.6);
}

/* 映画引用風バナー */
.cinema-quote {
    padding: 150px 40px;
    text-align: center;
}

.quote-box {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: 40px;
}

.quote-box::before, .quote-box::after {
    content: '"';
    font-size: 5rem;
    color: var(--dark-brown);
    position: absolute;
}

.quote-box::before { top: 0; left: 0; }
.quote-box::after { bottom: 0; right: 0; }

.quote-box blockquote {
    font-size: 1.8rem;
    color: var(--classic-sepia);
}

/* フッター */
footer {
    padding: 80px 40px;
    border-top: 1px solid var(--dark-brown);
    text-align: center;
}

.footer-logo {
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.copyright {
    margin-top: 40px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* レスポンシブ */
@media (max-width: 1000px) {
    .hero-frame, .archive-item {
        flex-direction: column;
    }
    .hero-content {
        padding: 40px 20px;
    }
    .archive-text {
        padding: 40px;
        order: 2;
    }
    .archive-visual {
        order: 1;
    }
    .gallery-grid {
        grid-template-columns: 1fr;
    }
}