:root {
            --bg-deep-black: #050505; /* True vintage black */
            --film-gray: #151515;
            --text-pure-white: #ffffff;
            --text-off-white: #e8e8e8;
            --accent-yellow: #f0c420; /* Vintage camera digital data color */
            --font-ui: 'Courier Prime', monospace;
            --font-main: 'Noto Sans JP', sans-serif;
        }

        body {
            background-color: var(--bg-deep-black);
            color: var(--text-off-white);
            font-family: var(--font-main);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            line-height: 1.8;
        }

        /* フィルム特有のざらつき（グレイン）エフェクト */
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background-image: url('data:image/svg+xml;utf8,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="3" stitchTiles="stitch"/></filter><rect width="100" height="100" filter="url(%23noise)" opacity="0.08"/></svg>');
            pointer-events: none;
            z-index: 9999;
        }

        /* --- 左右のフィルムパーフォレーション（送り穴） --- */
        .film-edge {
            position: fixed;
            top: 0;
            bottom: 0;
            width: 32px;
            background-color: #000;
            z-index: 40;
            border-right: 1px solid #222;
            border-left: 1px solid #222;
        }
        .film-edge-left { left: 0; }
        .film-edge-right { right: 0; }
        
        .film-edge::after {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            top: 0;
            bottom: 0;
            width: 12px;
            /* 送り穴のデザイン */
            background-image: repeating-linear-gradient(to bottom, 
                rgba(255,255,255,0.15) 0px, 
                rgba(255,255,255,0.15) 8px, 
                transparent 8px, 
                transparent 24px
            );
        }

        @media (min-width: 768px) {
            .film-edge { width: 48px; }
            .film-edge::after {
                width: 18px;
                background-image: repeating-linear-gradient(to bottom, 
                    rgba(255,255,255,0.15) 0px, 
                    rgba(255,255,255,0.15) 12px, 
                    transparent 12px, 
                    transparent 32px
                );
            }
        }

        /* メインコンテンツエリア（左右のフィルムに被らないように調整） */
        .main-container {
            padding-left: 32px;
            padding-right: 32px;
            max-width: 1000px;
            margin: 0 auto;
        }
        @media (min-width: 768px) {
            .main-container {
                padding-left: 48px;
                padding-right: 48px;
            }
        }

        /* --- セクション用：1コマのフィルム・ファインダー枠 --- */
        .film-frame {
            position: relative;
            background: var(--film-gray);
            border: 1px solid #333;
            margin-bottom: 4rem;
            padding: 3rem 1.5rem;
            box-shadow: inset 0 0 40px rgba(0,0,0,0.8), 0 10px 30px rgba(0,0,0,0.5);
        }
        @media (min-width: 768px) {
            .film-frame { padding: 4rem 3rem; }
        }

        /* ファインダーのコーナー（四隅の白い枠線） */
        .film-frame::before, .film-frame::after,
        .frame-inner-corners::before, .frame-inner-corners::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            border-color: rgba(255, 255, 255, 0.7);
            border-style: solid;
            pointer-events: none;
            z-index: 10;
        }
        .film-frame::before { top: 15px; left: 15px; border-width: 2px 0 0 2px; }
        .film-frame::after { bottom: 15px; right: 15px; border-width: 0 2px 2px 0; }
        .frame-inner-corners::before { top: 15px; right: 15px; border-width: 2px 2px 0 0; }
        .frame-inner-corners::after { bottom: 15px; left: 15px; border-width: 0 0 2px 2px; }

        /* セクション見出しスタイル */
        .section-heading {
            font-family: var(--font-main);
            font-weight: 700;
            color: var(--accent-yellow);
            font-size: clamp(1.4rem, 4vw, 2rem);
            letter-spacing: 0.15em;
            text-transform: uppercase;
            border-bottom: 2px solid rgba(240, 196, 32, 0.4);
            padding-bottom: 0.5rem;
            margin-bottom: 2.5rem;
            display: inline-block;
            position: relative;
            animation: filmFlicker 4.5s infinite;
        }

        /* フィルムの経年劣化やプロジェクターの揺れを模したアニメーション */
        @keyframes filmFlicker {
            0%, 9%, 11%, 19%, 21%, 69%, 71%, 100% {
                opacity: 1;
                text-shadow: 0 0 10px rgba(240, 196, 32, 0.1);
                transform: translateX(0);
            }
            10% {
                opacity: 0.8;
                text-shadow: -3px 0 8px rgba(240, 196, 32, 0.6);
                transform: translateX(-1px);
            }
            20% {
                opacity: 0.9;
                text-shadow: 3px 0 8px rgba(240, 196, 32, 0.6);
                transform: translateX(1px);
            }
            70% {
                opacity: 0.5;
                text-shadow: 0 0 15px rgba(240, 196, 32, 0.8);
                transform: translateX(0);
            }
        }

        /* --- タイトル特化のスタイル --- */
        .main-title {
            font-size: clamp(2rem, 5vw, 3.0rem);
            color: var(--text-pure-white);
            font-weight: 900;
            text-shadow: 0 0 15px rgba(255,255,255,0.4), 2px 2px 0px rgba(0,0,0,1);
            line-height: 1.2;
            letter-spacing: 0.05em;
        }

        /* --- テーブル設定 --- */
        .theme-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            min-width: 600px;
        }
        .theme-table th, .theme-table td {
            padding: 1.5rem 1rem;
            border-bottom: 1px solid #333;
            vertical-align: top;
        }
        .theme-table th {
            font-weight: 700;
            width: 25%;
            color: var(--text-pure-white);
            font-family: var(--font-main);
            letter-spacing: 0.1em;
        }
        .theme-table td {
            color: var(--text-off-white);
        }

        /* --- カメラUI部品 --- */
        .rec-indicator {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #ff3b3b;
            font-family: var(--font-ui);
            font-size: 0.9rem;
            font-weight: bold;
            letter-spacing: 0.1em;
            animation: blink 2s infinite;
        }
        .rec-dot {
            width: 10px;
            height: 10px;
            background-color: #ff3b3b;
            border-radius: 50%;
            box-shadow: 0 0 8px #ff3b3b;
        }
        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.2; }
        }

        .camera-data {
            font-family: var(--font-ui);
            color: var(--accent-yellow);
            font-size: 1.5rem;
            letter-spacing: 0.1em;
        }

        /* アコーディオン設定 */
        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }

        /* スクロールバー設定 */
        ::-webkit-scrollbar { width: 6px; height: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-deep-black); }
        ::-webkit-scrollbar-thumb { background: #444; }
        ::-webkit-scrollbar-thumb:hover { background: var(--accent-yellow); }