/* PDFスライド資料ビューワー - スタイルシート */

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

/* 基本設定 */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --success-hover: #059669;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 8px;
    --border-radius-lg: 12px;
}

body {
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* ヘッダー */
.header {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    color: var(--danger-color);
}

.logo-image {
    height: 2rem;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1));
}

.nav {
    display: flex;
    gap: 1rem;
}

.nav-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.nav-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* メインコンテンツ */
.main {
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

.section {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: 2rem;
    margin-bottom: 2rem;
}

/* アップロードセクション */
.upload-section {
    text-align: center;
}

.upload-area {
    max-width: 600px;
    margin: 0 auto;
}

.upload-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-area h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.password-group {
    margin-bottom: 2rem;
    text-align: left;
}

.password-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.password-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.password-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.file-input-wrapper {
    margin-bottom: 2rem;
}

.file-input-wrapper input[type="file"] {
    display: none;
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.file-input-label:hover {
    background: var(--primary-hover);
}

/* ファイル情報フォーム */
.file-info-form {
    background: var(--background-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
    text-align: left;
}

.file-info-form h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-help {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    font-style: italic;
}

.save-btn {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s ease;
}

.save-btn:hover {
    background: #059669;
}

/* リストセクション */
.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.list-header h2 {
    color: var(--text-primary);
}

.list-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 0.75rem;
    color: var(--text-secondary);
}

.search-box input {
    padding: 0.5rem 0.75rem 0.5rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    width: 250px;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

#sortSelect {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    cursor: pointer;
}

.pdf-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.pdf-item {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.pdf-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.pdf-thumbnail {
    width: 100%;
    border-radius: var(--border-radius);
    display: block;
    margin-bottom: 1rem;
    overflow: hidden;
    position: relative;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.pdf-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.pdf-thumbnail.no-image {
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.pdf-thumbnail i {
    font-size: 4rem;
    color: var(--danger-color);
}

.pdf-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pdf-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pdf-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* PDFビューワーセクション */
.viewer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.back-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
}

.back-btn:hover {
    background: #475569;
}

.viewer-controls {
    display: flex;
    gap: 0.5rem;
}

.delete-btn {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
}

.delete-btn:hover {
    background: #dc2626;
}

.share-btn {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
}

.share-btn:hover {
    background: #059669;
}

.pdf-viewer-container {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.viewer-controls-bar {
    background: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.viewer-controls-bar button {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    transition: all 0.2s ease;
}

.viewer-controls-bar button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.viewer-controls-bar button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.viewer-controls-bar button:disabled:hover {
    background: var(--surface-color);
    color: var(--text-primary);
    border-color: var(--border-color);
}

#pageInfo, #zoomLevel {
    font-weight: 500;
    color: var(--text-primary);
    min-width: 60px;
    text-align: center;
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.download-controls {
    display: flex;
    align-items: center;
    margin-left: auto;
}

.download-controls button {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.download-controls button:hover {
    background: var(--success-hover);
    transform: translateY(-1px);
}

.pdf-canvas-container {
    background: #f8f9fa;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 600px;
    overflow: auto;
}

#pdfCanvas {
    box-shadow: var(--shadow-lg);
    max-width: 100%;
    height: auto;
}

/* 共有セクション */
.share-content {
    max-width: 600px;
    margin: 0 auto;
}

.share-content h2 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.share-content p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.share-link-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.share-link-container input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--background-color);
}

.copy-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: background-color 0.2s ease;
    white-space: nowrap;
}

.copy-btn:hover {
    background: var(--primary-hover);
}

.share-options {
    background: var(--background-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
}

.share-options h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* ローディング */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.loading-spinner i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.loading-spinner p {
    color: var(--text-primary);
    font-weight: 500;
}

/* モーダル */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.modal-content {
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.modal-close:hover {
    background: var(--background-color);
}

.modal-body {
    padding: 1.5rem;
}

.modal-body p {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.btn-primary, .btn-secondary {
    padding: 0.5rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--background-color);
}

/* メッセージ */
.message-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10001;
    max-width: 400px;
}

.message {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.5rem;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid;
    animation: slideIn 0.3s ease;
}

.message.success {
    border-left-color: var(--success-color);
}

.message.error {
    border-left-color: var(--danger-color);
}

.message.warning {
    border-left-color: var(--warning-color);
}

.message.info {
    border-left-color: var(--primary-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .logo-image {
        height: 1.5rem;
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .list-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .list-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .pdf-list {
        grid-template-columns: 1fr;
    }
    
    .viewer-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .viewer-controls {
        justify-content: center;
    }
    
    .viewer-controls-bar {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .pdf-canvas-container {
        padding: 1rem;
        min-height: 400px;
    }
    
    .share-link-container {
        flex-direction: column;
    }
    
    .modal-content {
        width: 95%;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 1rem;
    }
    
    .upload-icon {
        font-size: 3rem;
    }
    
    .pdf-canvas-container {
        padding: 0.5rem;
        min-height: 300px;
    }
    
    .message-container {
        left: 10px;
        right: 10px;
        max-width: none;
    }
}

/* 印刷スタイル */
@media print {
    .header, .nav, .viewer-controls, .viewer-controls-bar {
        display: none !important;
    }
    
    .pdf-canvas-container {
        padding: 0;
        background: white;
    }
    
    #pdfCanvas {
        box-shadow: none;
        max-width: 100%;
        width: 100%;
    }
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #0f172a;
        --surface-color: #1e293b;
        --border-color: #334155;
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
    }
    
    .pdf-thumbnail {
        background: #334155;
    }
    
    .pdf-canvas-container {
        background: #1e293b;
    }
    
    .logo-image {
        filter: invert(1) drop-shadow(0 1px 2px rgba(255,255,255,0.1));
    }
}

/* アクセシビリティ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* フォーカス表示の改善 */
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* スクロールバーのスタイリング */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}