/* ===================================
   YouTube動画ダウンロードツール 固有スタイル
   =================================== */

/* --- URL入力セクション --- */
.input-section {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.input-section h2 {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.url-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-field {
    width: 100%;
    padding: 14px 45px 14px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
    outline: none;
    box-sizing: border-box;
}

.input-field:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(77, 208, 225, 0.15);
}

.btn-clear-input {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px;
    transition: color var(--transition-fast);
}

.btn-clear-input:hover {
    color: var(--text-primary);
}

.url-hint {
    margin-top: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.url-error {
    margin-top: var(--spacing-sm);
    font-size: 0.85rem;
    color: #f56565;
}

/* --- サムネイルプレビュー --- */
.thumbnail-section {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.thumbnail-wrapper {
    display: inline-block;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    max-width: 480px;
    width: 100%;
}

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

/* --- タブ切替 --- */
.mode-tabs {
    display: flex;
    gap: 4px;
    background: #f1f5f9;
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: var(--spacing-xl);
}

.tab-btn {
    flex: 1;
    padding: 12px 16px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-tertiary);
    font-size: 0.95rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.5);
}

.tab-btn.active {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    font-weight: 600;
}

.tab-btn i {
    font-size: 0.9rem;
}

/* --- コントロールセクション --- */
.controls-section {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.control-group {
    margin-bottom: var(--spacing-lg);
}

.control-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.select-input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg-white);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition-fast);
    appearance: auto;
}

.select-input:focus {
    border-color: var(--primary-color);
}

/* --- ボタン --- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* --- ステータスセクション --- */
.status-section {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.status-message {
    font-size: 0.95rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-md);
}

.progress-bar-container {
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--primary-color);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-bar-indeterminate {
    width: 30%;
    animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(200%); }
    100% { transform: translateX(-100%); }
}

/* --- 結果セクション --- */
.result-section {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.result-success {
    text-align: center;
}

.result-message {
    font-size: 1.05rem;
    color: #48bb78;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.result-message i {
    margin-right: 6px;
}

.btn-download-link {
    display: inline-flex;
    max-width: 400px;
}

.result-error {
    text-align: center;
}

.error-message {
    font-size: 1.05rem;
    color: #f56565;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.error-message i {
    margin-right: 6px;
}

.error-fallback {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* --- コマンド表示 --- */
.command-section {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.command-section h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.command-display {
    position: relative;
    background: #1e293b;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.command-display pre {
    margin: 0;
    padding: 16px 60px 16px 16px;
    overflow-x: auto;
}

.command-display code {
    color: #e2e8f0;
    font-family: 'Courier New', Consolas, monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
}

.command-display-small pre {
    padding: 12px 16px;
}

.command-display-small code {
    font-size: 0.85rem;
}

.btn-copy {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    color: #94a3b8;
    font-size: 0.8rem;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
}

.btn-copy:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #e2e8f0;
}

.btn-copy.copied {
    background: rgba(72, 187, 120, 0.2);
    border-color: rgba(72, 187, 120, 0.4);
    color: #48bb78;
}

/* --- インストールガイド --- */
.install-guide {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.install-guide summary {
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}

.install-guide summary:hover {
    color: var(--primary-color);
}

.install-guide[open] summary {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid #e2e8f0;
}

.install-content h4 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.install-content .command-display {
    margin-bottom: var(--spacing-sm);
}

.install-note {
    margin-top: var(--spacing-lg);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.install-note a {
    color: var(--primary-color);
    text-decoration: none;
}

.install-note a:hover {
    text-decoration: underline;
}

/* --- 注意書き --- */
.notice-section {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.notice-section p {
    font-size: 0.85rem;
    color: #92400e;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.notice-section i {
    color: #f59e0b;
    flex-shrink: 0;
}

/* --- コピートースト --- */
.copy-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #1e293b;
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    pointer-events: none;
}

.copy-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* --- レスポンシブ --- */
@media (max-width: 768px) {
    .input-section,
    .controls-section,
    .status-section,
    .result-section,
    .command-section,
    .install-guide {
        padding: var(--spacing-xl);
    }

    .mode-tabs {
        flex-direction: column;
    }

    .tab-btn {
        padding: 10px 14px;
    }

    .thumbnail-wrapper {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .input-section,
    .controls-section,
    .status-section,
    .result-section,
    .command-section {
        padding: var(--spacing-lg);
    }

    .input-field {
        font-size: 0.9rem;
        padding: 12px 40px 12px 12px;
    }

    .command-display pre {
        padding: 12px 12px 12px 12px;
    }

    .btn-copy {
        position: static;
        width: 100%;
        justify-content: center;
        margin-top: 8px;
        padding: 8px;
    }

    .command-display {
        position: static;
    }
}