/* ==========================================================================
   Container Styles - 枠に沿ったバッジ版
   ========================================================================== */

.twitter-preview-container {
    position: relative;
    margin: 20px 0;
}

.twitter-preview-outside-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: #f1f3f4;
    color: #495057;
    padding: 6px 12px;
    border-radius: 0 12px 0 8px;
    font-size: 11px;
    font-weight: 400;
    z-index: 10;
    border-left: 1px solid #e1e8ed;
    border-bottom: 1px solid #e1e8ed;
}

.twitter-preview-wrapper {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    border: 1px solid #e1e8ed;
    border-radius: 12px;
    overflow: hidden;
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.2s ease;
}

.twitter-preview-wrapper:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* ==========================================================================
   Header Styles - スッキリ版
   ========================================================================== */

.twitter-preview-header {
    background: #f8f9fa;
    padding: 45px 20px 20px;
    border-bottom: 1px solid #e1e8ed;
}

.twitter-preview-title {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: #14171a;
    display: flex;
    align-items: center;
    justify-content: space-between;
    line-height: 1.3;
}

/* ========== ヘッダータグ統一（追加部分） ========== */
/* H1-H6 全て同じデザインに強制 - 詳細度を強化 */
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h1.twitter-preview-title,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h2.twitter-preview-title,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h3.twitter-preview-title,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h4.twitter-preview-title,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h5.twitter-preview-title,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h6.twitter-preview-title,
.twitter-preview-wrapper h1.twitter-preview-title,
.twitter-preview-wrapper h2.twitter-preview-title,
.twitter-preview-wrapper h3.twitter-preview-title,
.twitter-preview-wrapper h4.twitter-preview-title,
.twitter-preview-wrapper h5.twitter-preview-title,
.twitter-preview-wrapper h6.twitter-preview-title {
    margin: 0 !important;
    font-size: 20px !important;
    font-weight: 600 !important;
    color: #14171a !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    line-height: 1.3 !important;
    border: none !important;
    border-top: none !important;
    border-bottom: none !important;
    border-left: none !important;
    border-right: none !important;
    background: none !important;
    background-color: transparent !important;
    text-decoration: none !important;
    text-transform: none !important;
    letter-spacing: normal !important;
    padding: 0 0 8px 0 !important;
    box-shadow: none !important;
    position: relative !important;
}

/* タイトル下線デザイン - 参考コードと同じスタイル */
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h1.twitter-preview-title::after,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h2.twitter-preview-title::after,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h3.twitter-preview-title::after,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h4.twitter-preview-title::after,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h5.twitter-preview-title::after,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h6.twitter-preview-title::after,
.twitter-preview-wrapper h1.twitter-preview-title::after,
.twitter-preview-wrapper h2.twitter-preview-title::after,
.twitter-preview-wrapper h3.twitter-preview-title::after,
.twitter-preview-wrapper h4.twitter-preview-title::after,
.twitter-preview-wrapper h5.twitter-preview-title::after,
.twitter-preview-wrapper h6.twitter-preview-title::after {
    position: absolute !important;
    bottom: -3px !important;
    left: 0 !important;
    right: 0 !important;
    top: inherit !important;
    border-top: none !important;
    content: '' !important;
    width: 100% !important;
    height: 3px !important;
    background-color: #e1e8ed !important;
    z-index: 1 !important;
    display: block !important;
    border: none !important;
}

/* 青いアクセント下線（参考コードと同じ位置・色） */
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h1.twitter-preview-title::before,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h2.twitter-preview-title::before,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h3.twitter-preview-title::before,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h4.twitter-preview-title::before,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h5.twitter-preview-title::before,
.twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h6.twitter-preview-title::before,
.twitter-preview-wrapper h1.twitter-preview-title::before,
.twitter-preview-wrapper h2.twitter-preview-title::before,
.twitter-preview-wrapper h3.twitter-preview-title::before,
.twitter-preview-wrapper h4.twitter-preview-title::before,
.twitter-preview-wrapper h5.twitter-preview-title::before,
.twitter-preview-wrapper h6.twitter-preview-title::before {
    position: absolute !important;
    bottom: -3px !important;
    left: 0 !important;
    top: inherit !important;
    border-top: none !important;
    z-index: 3 !important;
    content: '' !important;
    width: 5em !important;
    height: 3px !important;
    background-color: #253d7d !important;
    display: block !important;
    border: none !important;
}

.twitter-preview-count {
    background: #1da1f2;
    color: white;
    padding: 6px 10px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: bold;
    margin-left: 12px;
    flex-shrink: 0;
    min-width: 28px;
    text-align: center;
}

/* ==========================================================================
   Preview List Styles
   ========================================================================== */

.twitter-preview-list {
    padding: 16px 20px;
    background: #ffffff;
}

.twitter-preview-item {
    display: flex;
    align-items: flex-start;
    padding: 10px 0;
    border-bottom: 1px solid #f1f3f4;
    transition: background-color 0.2s ease;
    gap: 8px;
}

.twitter-preview-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.twitter-preview-item:hover {
    background: rgba(29, 161, 242, 0.02);
    border-radius: 6px;
    margin: 0 -6px;
    padding-left: 6px;
    padding-right: 6px;
}

.twitter-preview-number {
    color: #1da1f2;
    font-weight: bold;
    min-width: 20px;
    font-size: 14px;
    flex-shrink: 0;
}

.twitter-preview-text {
    color: #14171a;
    flex: 1;
    line-height: 1.4;
    font-size: 14px;
    font-weight: 400;
}

/* ==========================================================================
   Expand Button Styles
   ========================================================================== */

.twitter-preview-expand-section {
    background: #f8f9fa;
    padding: 14px 20px;
    text-align: center;
    border-top: 1px solid #e1e8ed;
}

.twitter-preview-expand-btn {
    background: #1da1f2;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(29, 161, 242, 0.2);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.twitter-preview-expand-btn:hover {
    background: #1976d2;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(29, 161, 242, 0.3);
}

.twitter-preview-expand-btn:active {
    transform: translateY(0);
}

.twitter-preview-expand-btn:focus {
    outline: 2px solid #1da1f2;
    outline-offset: 2px;
}

.twitter-preview-expand-btn.loading {
    background: #95a5a6 !important;
    cursor: wait;
    pointer-events: none;
}

.twitter-preview-expand-btn.loading::after {
    content: "";
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==========================================================================
   Expanded Content Styles
   ========================================================================== */

.twitter-preview-expanded {
    border-top: 1px solid #e1e8ed;
    background: #ffffff;
    animation: expandContent 0.5s ease-out forwards;
}

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

.twitter-preview-collapse-section {
    background: #f8f9fa;
    padding: 6px 20px;
    text-align: right;
    border-bottom: 1px solid #e1e8ed;
}

.twitter-preview-collapse-btn {
    background: #6c757d;
    color: white;
    border: none;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.twitter-preview-collapse-btn:hover {
    background: #5a6268;
}

.twitter-preview-content {
    padding: 20px;
}

.twitter-preview-source {
    font-size: 15px;
    font-weight: 600;
    color: #14171a;
    margin: 0 0 16px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid #e1e8ed;
}

/* ==========================================================================
   Twitter Embed Styles
   ========================================================================== */

.twitter-preview-content .twitter-tweet {
    background: #ffffff !important;
    border: 1px solid #e1e8ed !important;
    border-radius: 12px !important;
    margin: 16px 0 !important;
    padding: 16px !important;
    font-family: inherit !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
    transition: all 0.2s ease !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    box-sizing: border-box !important;
}

.twitter-preview-content .twitter-tweet:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15) !important;
    transform: translateY(-1px);
}

.twitter-preview-content .twitter-tweet p {
    color: #14171a !important;
    font-size: 15px !important;
    line-height: 1.4 !important;
    margin-bottom: 12px !important;
}

.twitter-preview-content .twitter-tweet a {
    color: #1da1f2 !important;
    text-decoration: none !important;
}

.twitter-preview-content .twitter-tweet a:hover {
    text-decoration: underline !important;
    color: #1976d2 !important;
}

/* ==========================================================================
   Error Styles
   ========================================================================== */

.twitter-preview-error {
    padding: 14px;
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: 8px;
    color: #721c24;
    text-align: center;
    margin: 12px 0;
    font-size: 13px;
}

/* ==========================================================================
   Mobile Responsive
   ========================================================================== */

@media (max-width: 768px) {
    .twitter-preview-container {
        margin: 15px -10px;
    }
    
    .twitter-preview-outside-badge {
        font-size: 10px;
        padding: 5px 10px;
        border-radius: 0 0 0 6px;
    }
    
    .twitter-preview-wrapper {
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
    
    .twitter-preview-header {
        padding: 30px 16px;
    }
    
    .twitter-preview-title {
        font-size: 18px;
        flex-wrap: wrap;
        gap: 12px;
        align-items: flex-start;
    }
    
    /* モバイル用ヘッダータグ統一 */
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h1.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h2.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h3.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h4.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h5.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h6.twitter-preview-title,
    .twitter-preview-wrapper h1.twitter-preview-title,
    .twitter-preview-wrapper h2.twitter-preview-title,
    .twitter-preview-wrapper h3.twitter-preview-title,
    .twitter-preview-wrapper h4.twitter-preview-title,
    .twitter-preview-wrapper h5.twitter-preview-title,
    .twitter-preview-wrapper h6.twitter-preview-title {
        font-size: 18px !important;
        flex-wrap: wrap !important;
        gap: 12px !important;
        align-items: flex-start !important;
        padding-bottom: 6px !important;
    }
    
    /* モバイル用下線サイズ調整 */
    .twitter-preview-wrapper h1.twitter-preview-title::after,
    .twitter-preview-wrapper h2.twitter-preview-title::after,
    .twitter-preview-wrapper h3.twitter-preview-title::after,
    .twitter-preview-wrapper h4.twitter-preview-title::after,
    .twitter-preview-wrapper h5.twitter-preview-title::after,
    .twitter-preview-wrapper h6.twitter-preview-title::after {
        height: 2px !important;
        bottom: -2px !important;
    }
    
    .twitter-preview-wrapper h1.twitter-preview-title::before,
    .twitter-preview-wrapper h2.twitter-preview-title::before,
    .twitter-preview-wrapper h3.twitter-preview-title::before,
    .twitter-preview-wrapper h4.twitter-preview-title::before,
    .twitter-preview-wrapper h5.twitter-preview-title::before,
    .twitter-preview-wrapper h6.twitter-preview-title::before {
        width: 4em !important;
        height: 2px !important;
        bottom: -2px !important;
    }
    
    .twitter-preview-count {
        margin-left: 0;
        margin-top: 4px;
    }
    
    .twitter-preview-count {
        font-size: 11px;
        padding: 3px 8px;
        margin-left: 10px;
        min-width: 24px;
    }
    
    .twitter-preview-list {
        padding: 12px 16px;
    }
    
    .twitter-preview-item {
        padding: 8px 0;
    }
    
    .twitter-preview-text {
        font-size: 13px;
    }
    
    .twitter-preview-expand-section {
        padding: 12px 16px;
    }
    
    .twitter-preview-expand-btn {
        padding: 10px 20px;
        font-size: 13px;
        width: 100%;
        max-width: 280px;
    }
    
    .twitter-preview-collapse-section {
        padding: 6px 16px;
    }
    
    .twitter-preview-content {
        padding: 16px;
    }
    
    .twitter-preview-content .twitter-tweet {
        margin: 12px 0 !important;
        padding: 12px !important;
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        box-sizing: border-box !important;
        transform: none !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
    
    .twitter-preview-content .twitter-tweet img {
        max-width: 100% !important;
        height: auto !important;
    }
    
    .twitter-preview-content .twitter-tweet .twitter-tweet-media,
    .twitter-preview-content .twitter-tweet [data-testid="tweetPhoto"] {
        max-width: 100% !important;
        width: 100% !important;
    }
    
    .twitter-preview-content iframe {
        width: 100% !important;
        max-width: 100% !important;
    }
}

@media (max-width: 480px) {
    .twitter-preview-outside-badge {
        font-size: 9px;
        padding: 4px 8px;
    }
    
    .twitter-preview-header {
        padding: 28px 14px;
    }
    
    .twitter-preview-title {
        font-size: 17px;
        flex-wrap: wrap;
        gap: 10px;
        align-items: flex-start;
    }
    
    /* 超小画面用ヘッダータグ統一 */
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h1.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h2.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h3.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h4.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h5.twitter-preview-title,
    .twitter-preview-container .twitter-preview-wrapper .twitter-preview-header h6.twitter-preview-title,
    .twitter-preview-wrapper h1.twitter-preview-title,
    .twitter-preview-wrapper h2.twitter-preview-title,
    .twitter-preview-wrapper h3.twitter-preview-title,
    .twitter-preview-wrapper h4.twitter-preview-title,
    .twitter-preview-wrapper h5.twitter-preview-title,
    .twitter-preview-wrapper h6.twitter-preview-title {
        font-size: 17px !important;
        flex-wrap: wrap !important;
        gap: 10px !important;
        align-items: flex-start !important;
        padding-bottom: 5px !important;
    }
    
    /* 超小画面用下線サイズ調整 */
    .twitter-preview-wrapper h1.twitter-preview-title::after,
    .twitter-preview-wrapper h2.twitter-preview-title::after,
    .twitter-preview-wrapper h3.twitter-preview-title::after,
    .twitter-preview-wrapper h4.twitter-preview-title::after,
    .twitter-preview-wrapper h5.twitter-preview-title::after,
    .twitter-preview-wrapper h6.twitter-preview-title::after {
        height: 2px !important;
        bottom: -2px !important;
    }
    
    .twitter-preview-wrapper h1.twitter-preview-title::before,
    .twitter-preview-wrapper h2.twitter-preview-title::before,
    .twitter-preview-wrapper h3.twitter-preview-title::before,
    .twitter-preview-wrapper h4.twitter-preview-title::before,
    .twitter-preview-wrapper h5.twitter-preview-title::before,
    .twitter-preview-wrapper h6.twitter-preview-title::before {
        width: 3.5em !important;
        height: 2px !important;
        bottom: -2px !important;
    }
    
    .twitter-preview-count {
        margin-left: 0;
        margin-top: 2px;
        font-size: 12px;
        padding: 4px 8px;
        min-width: 24px;
    }
    
    .twitter-preview-count {
        font-size: 10px;
        padding: 2px 6px;
        margin-left: 8px;
        min-width: 20px;
    }
    
    .twitter-preview-list {
        padding: 10px 14px;
    }
    
    .twitter-preview-item {
        padding: 6px 0;
    }
    
    .twitter-preview-text {
        font-size: 12px;
    }
    
    .twitter-preview-number {
        min-width: 18px;
        font-size: 12px;
    }
    
    .twitter-preview-expand-section {
        padding: 10px 14px;
    }
    
    .twitter-preview-expand-btn {
        padding: 9px 18px;
        font-size: 12px;
    }
}

/* ==========================================================================
   Desktop Styles
   ========================================================================== */

@media (min-width: 769px) {
    .twitter-preview-content .twitter-tweet {
        margin: 20px auto !important;
        width: calc(100% - 20px) !important;
        max-width: 550px !important;
    }
    
    .twitter-preview-content {
        padding: 25px 30px !important;
    }
}

@media (min-width: 1024px) {
    .twitter-preview-content .twitter-tweet {
        margin: 24px auto !important;
        width: calc(100% - 40px) !important;
        max-width: 600px !important;
    }
    
    .twitter-preview-content {
        padding: 30px 40px !important;
    }
}

/* ==========================================================================
   Accessibility & Print
   ========================================================================== */

.twitter-preview-expand-btn:focus-visible,
.twitter-preview-collapse-btn:focus-visible {
    outline: 2px solid #1da1f2;
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .twitter-preview-expanded,
    .twitter-preview-expand-btn,
    .twitter-preview-spinner {
        animation: none;
        transition: none;
    }
}

@media print {
    .twitter-preview-wrapper {
        break-inside: avoid;
    }
    
    .twitter-preview-header {
        background: transparent !important;
    }
    
    .twitter-preview-expanded {
        display: block !important;
    }
    
    .twitter-preview-expand-btn,
    .twitter-preview-collapse-btn {
        display: none;
    }
}

@media (prefers-contrast: high) {
    .twitter-preview-wrapper {
        border: 2px solid;
    }
    
    .twitter-preview-header {
        border-bottom: 1px solid;
    }
    
    .twitter-preview-item {
        border-bottom: 1px solid;
    }
    
    .twitter-preview-expand-btn {
        border: 2px solid;
    }
}