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

body {
    font-family: 'Zen Maru Gothic', 'M PLUS Rounded 1c', 'Hiragino Maru Gothic ProN', sans-serif;
    line-height: 1.8;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.3);
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sidebar {
    width: 280px;
    background: #f8f9fa;
    border-right: 2px solid #e9ecef;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.special-links {
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.special-link {
    display: block;
    padding: 1rem;
    text-decoration: none;
    color: white;
    background: linear-gradient(135deg, #06d6a0 0%, #028090 100%);
    border-radius: 10px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(6, 214, 160, 0.3);
    font-size: 0.95rem;
}

.special-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(6, 214, 160, 0.4);
}

.special-link.warning {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    box-shadow: 0 4px 8px rgba(255, 107, 107, 0.3);
}

.special-link.warning:hover {
    box-shadow: 0 6px 12px rgba(255, 107, 107, 0.4);
}

.special-link.danger {
    background: linear-gradient(135deg, #6a040f 0%, #9d0208 100%);
    box-shadow: 0 4px 8px rgba(106, 4, 15, 0.3);
}

.special-link.danger:hover {
    box-shadow: 0 6px 12px rgba(106, 4, 15, 0.4);
}

.sidebar h2 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    margin-top: 1rem;
    color: #667eea;
    border-bottom: 3px solid #667eea;
    padding-bottom: 0.5rem;
    font-weight: 600;
}

.episode-list {
    list-style: none;
    flex: 1;
    overflow-y: auto;
}

.episode-item {
    margin-bottom: 0.5rem;
}

.episode-link {
    display: block;
    padding: 0.8rem 1rem;
    text-decoration: none;
    color: #495057;
    background: white;
    border-radius: 8px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    font-weight: 500;
}

.episode-link:hover {
    background: #e9ecef;
    border-color: #667eea;
    transform: translateX(5px);
}

.episode-link.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: #667eea;
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

.content {
    flex: 1;
    overflow-y: auto;
    padding: 2.5rem 3rem;
    background: white;
}

.story-content {
    max-width: 850px;
    animation: fadeIn 0.5s ease-in;
    margin: 0 auto;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome {
    text-align: center;
    padding: 4rem 2rem;
    color: #6c757d;
}

.welcome h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #667eea;
}

.welcome p {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.story-content h1 {
    font-size: 2.2rem;
    color: #667eea;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid #667eea;
}

.story-content h2 {
    font-size: 1.6rem;
    color: #764ba2;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-left: 1rem;
    border-left: 5px solid #764ba2;
}

.story-content p {
    margin-bottom: 1.3rem;
    text-indent: 1em;
    text-align: justify;
}

.story-content strong {
    color: #667eea;
    font-weight: bold;
}

.story-content em {
    color: #764ba2;
    font-style: italic;
}

/* 登場人物・相関図用スタイル */
.character-diagram {
    margin: 2rem 0;
}

.character-diagram h2 {
    text-align: center;
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 2rem;
}

.relationship-diagram {
    width: 100%;
    max-width: 800px;
    height: auto;
    margin: 0 auto;
    display: block;
    background: #f8f9fa;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.character-name, .character-name-main, .character-name-sub, .character-name-small {
    fill: white;
    font-weight: 600;
    font-size: 14px;
}

.character-name-main {
    font-size: 16px;
}

.character-name-sub {
    font-size: 12px;
}

.character-name-small {
    font-size: 18px;
}

.character-role {
    fill: rgba(255, 255, 255, 0.8);
    font-size: 11px;
}

.relation-label, .relation-label-main, .relation-label-danger, .relation-label-small {
    fill: #495057;
    font-size: 12px;
    font-weight: 500;
}

.relation-label-main {
    fill: #667eea;
    font-weight: 600;
}

.relation-label-danger {
    fill: #e63946;
    font-weight: 600;
}

.relation-label-small {
    font-size: 10px;
}

.diagram-legend {
    margin-top: 2rem;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 5px solid #667eea;
}

.diagram-legend h3 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.legend-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.legend-marker {
    display: inline-block;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    flex-shrink: 0;
}

.loading {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
    font-size: 1.2rem;
}

.error {
    text-align: center;
    padding: 3rem;
    color: #dc3545;
    font-size: 1.2rem;
}

footer {
    background: #f8f9fa;
    text-align: center;
    padding: 1.5rem;
    border-top: 2px solid #e9ecef;
    color: #6c757d;
}

/* スクロールバーのカスタマイズ */
.sidebar::-webkit-scrollbar,
.content::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track,
.content::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.sidebar::-webkit-scrollbar-thumb,
.content::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover,
.content::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}

/* レスポンシブデザイン */

/* タブレット (1024px以下) */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }

    .content {
        padding: 2rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .story-content {
        max-width: 100%;
    }

    .story-content h1 {
        font-size: 1.9rem;
    }

    .story-content h2 {
        font-size: 1.4rem;
    }
}

/* モバイル (768px以下) */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        max-height: 250px;
        border-right: none;
        border-bottom: 2px solid #e9ecef;
        padding: 1rem;
    }

    .sidebar h2 {
        font-size: 1.1rem;
    }

    .episode-list {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 0.5rem;
    }

    .episode-link {
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
        text-align: center;
    }

    .episode-link:hover {
        transform: none;
    }

    .content {
        padding: 1.5rem 1.2rem;
    }

    header {
        padding: 1.5rem 1rem;
    }

    header h1 {
        font-size: 1.6rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .story-content h1 {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .story-content h2 {
        font-size: 1.2rem;
        margin-top: 2rem;
        padding-left: 0.7rem;
    }

    .story-content p {
        font-size: 1rem;
        margin-bottom: 1rem;
        text-indent: 0.8em;
    }

    .page-navigation {
        flex-direction: row;
        gap: 0.5rem;
        margin-top: 2rem;
        padding-top: 1.5rem;
    }

    .nav-button {
        padding: 0.7rem 1rem;
        font-size: 0.9rem;
        flex: 1;
        justify-content: center;
    }

    .nav-spacer {
        display: none;
    }

    .welcome {
        padding: 2rem 1rem;
    }

    .welcome h2 {
        font-size: 1.5rem;
    }

    .welcome p {
        font-size: 1rem;
    }

    footer {
        padding: 1rem;
        font-size: 0.9rem;
    }

    .legend-grid {
        grid-template-columns: 1fr;
    }

    .relationship-diagram {
        max-width: 100% !important;
    }
}

/* 小型モバイル (480px以下) */
@media (max-width: 480px) {
    header h1 {
        font-size: 1.4rem;
    }

    .subtitle {
        font-size: 0.85rem;
    }

    .sidebar {
        max-height: 200px;
        padding: 0.8rem;
    }

    .episode-list {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 0.4rem;
    }

    .episode-link {
        padding: 0.5rem;
        font-size: 0.85rem;
    }

    .content {
        padding: 1rem 0.8rem;
    }

    .story-content h1 {
        font-size: 1.3rem;
    }

    .story-content h2 {
        font-size: 1.1rem;
        margin-top: 1.5rem;
    }

    .story-content p {
        font-size: 0.95rem;
        text-indent: 0.8em;
    }

    .nav-button {
        padding: 0.6rem 0.8rem;
        font-size: 0.85rem;
        border-radius: 20px;
    }

    .nav-button.prev::before,
    .nav-button.next::after {
        font-size: 1rem;
    }

    .page-navigation {
        margin-top: 1.5rem;
        padding-top: 1rem;
    }
}

/* ページナビゲーション */
.page-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #e9ecef;
    gap: 1rem;
}

.nav-button {
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(102, 126, 234, 0.4);
}

.nav-button:active {
    transform: translateY(0);
}

.nav-button.disabled {
    opacity: 0.3;
    pointer-events: none;
}

.nav-button.prev::before {
    content: '←';
    font-size: 1.2rem;
}

.nav-button.next::after {
    content: '→';
    font-size: 1.2rem;
}

.nav-spacer {
    flex: 1;
}

/* 印刷用スタイル */
@media print {
    body {
        background: white;
    }

    .sidebar,
    .page-navigation,
    footer {
        display: none;
    }

    .container {
        box-shadow: none;
    }

    .content {
        padding: 0;
    }

    .story-content h1,
    .story-content h2 {
        page-break-after: avoid;
    }

    .story-content p {
        page-break-inside: avoid;
    }
}