/* =================================================================
 * Color Palette Generator Specific Styles
 * ================================================================= */

#colorPanelsContainer {
    display: flex;
    flex-grow: 1;
}

.color-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between; 
    align-items: center;
    position: relative;
    transition: background-color 0.3s ease, flex 0.3s ease, transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    min-width: 80px;
    cursor: grab;
    padding-top: 40px; 
    padding-bottom: 40px; 
}
.color-panel:active { cursor: grabbing; }
.color-panel.is-moving { z-index: 50; }

.color-panel.role-stock {
    flex: 0.35; 
    min-width: 60px;
}
.color-panel.role-stock .hex-input-group,
.color-panel.role-stock .color-formats-container,
.color-panel.role-stock .btn-set-base,
.color-panel.role-stock .role-select-wrapper {
    display: none !important; 
}
.color-panel.role-stock .btn-lock,
.color-panel.role-stock .btn-delete {
    display: none !important; 
}

body.is-dragging-global .color-panel {
    transition: none !important;
}
body.is-dragging-global .add-panel-btn {
    display: none !important;
}
.color-panel.is-dragging {
    opacity: 0.4;
    transform: scale(0.95);
    z-index: 100;
}
.color-panel.drag-over {
    box-shadow: inset 0 0 0 4px rgba(0, 0, 0, 0.4);
}

.color-panel.is-base-panel {
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.5);
    z-index: 5;
}

.base-badge {
    position: absolute;
    top: 75px; 
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.65rem;
    font-weight: bold;
    background: rgba(255,255,255,0.25);
    padding: 2px 10px;
    border-radius: 12px;
    pointer-events: none;
    letter-spacing: 1px;
}
.color-panel.is-light .base-badge {
    background: rgba(0,0,0,0.1);
    color: #333;
}

.stock-badge {
    position: absolute;
    top: 40px; 
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.65rem;
    pointer-events: none;
    color: rgba(255, 255, 255, 0.9); /* 白背景に強い白テキスト */
    font-weight: bold;
}
/* 明るい色のパネルの場合は、黒いテキストに切り替える */
.color-panel.is-light .stock-badge {
    color: rgba(0, 0, 0, 0.7);
}

.role-select-wrapper {
    opacity: 0.8;
    transition: opacity 0.2s;
    z-index: 10;
}
.color-panel:hover .role-select-wrapper { opacity: 1; }
.role-select {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
    cursor: pointer;
    font-weight: bold;
    text-align: center;
    appearance: none;
    -webkit-appearance: none;
}
.role-select:focus { outline: none; background: rgba(0,0,0,0.1); }
.role-select option { color: #333; background: #fff; }

.color-panel.is-light .role-select {
    border-color: rgba(0, 0, 0, 0.4);
    color: #1a1a1a;
}
.color-panel.is-light .role-select:focus {
    background: rgba(0, 0, 0, 0.05);
}

.color-toggle-btn {
    transition: all 0.2s ease;
    position: relative;
}
.color-toggle-btn.active-toggle {
    box-shadow: 0 0 0 2px var(--bs-body-bg), 0 0 0 4px var(--bs-primary) !important;
    transform: scale(0.85);
}

/* =================================================================
 * FAB (Floating Action Button) Styles
 * ================================================================= */
.fab-container {
    background: rgba(33, 37, 41, 0.4); 
    backdrop-filter: blur(12px); 
    -webkit-backdrop-filter: blur(12px);
    
    /* ★修正: Bootstrapの自動スクロールバー補正（Padding/Marginの強制追加）をブロック */
    padding: 12px !important;
    margin: 0 !important;
    right: 30px !important;
    
    border-radius: 50px; 
    border: 1px solid rgba(255, 255, 255, 0.1); 
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    transition: transform 0.2s;
}
.fab-btn {
    width: 48px;
    height: 48px;
    transition: transform 0.2s, background-color 0.2s;
}
.fab-btn:hover {
    transform: scale(1.1);
}
@keyframes fab-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(0.85); }
    100% { transform: scale(1); }
}

.fab-saved-pulse {
    animation: fab-pulse 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background-color: #495057 !important;
    border-color: #6c757d !important;
}
.fab-saved-pulse i {
    color: var(--bs-warning) !important;
}

/* =================================================================
 * 全体調整用 動的カラースライダー
 * ================================================================= */
.color-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 10px;
    border-radius: 5px;
    outline: none;
    border: none;
    margin: 0;
    padding: 0;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.3);
}
.color-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #ffffff;
    border: 2px solid #ccc;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    transition: transform 0.1s, border-color 0.2s;
}
.color-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    border-color: #aaa;
}
.color-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #ffffff;
    border: 2px solid #ccc;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    transition: transform 0.1s, border-color 0.2s;
}

/* =================================================================
 * HEX入力エリアとピッカー関連
 * ================================================================= */
.hex-input-group {
    background-color: transparent;
    border-radius: 12px;
    padding: 4px 8px;
    transition: background-color 0.2s;
}
.hex-input-group:hover {
    background-color: rgba(255, 255, 255, 0.15);
}
.color-panel.is-light .hex-input-group:hover {
    background-color: rgba(0, 0, 0, 0.1);
}
.color-panel.is-locked .hex-input-group:hover {
    background-color: transparent;
}

.hex-hash {
    font-size: 1.6rem;
    font-weight: 300;
    font-family: system-ui, -apple-system, sans-serif;
    color: #ffffff;
    opacity: 0.5;
    margin-right: 2px;
}

.input-hex {
    font-size: 1.6rem;
    font-weight: 600;
    font-family: system-ui, -apple-system, sans-serif;
    color: #ffffff;
    background: transparent;
    border: none;
    text-align: left;
    width: 6.2ch;
    padding: 0;
    border-radius: 8px;
    cursor: text;
    text-transform: uppercase;
    transition: background-color 0.2s;
    letter-spacing: 0.5px;
}
.input-hex:focus {
    outline: none;
    background-color: rgba(0, 0, 0, 0.2);
    padding-left: 4px;
}

.color-panel.is-light .hex-hash,
.color-panel.is-light .input-hex {
    color: #1a1a1a;
}
.color-panel.is-light .input-hex:focus {
    background-color: rgba(255, 255, 255, 0.5);
}

.picker-trigger {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.2);
    transition: transform 0.2s, background-color 0.2s;
    flex-shrink: 0;
    color: #ffffff;
    font-size: 1.1rem;
}
.picker-trigger:hover {
    transform: scale(1.1);
    background-color: rgba(255,255,255,0.4);
}
.color-panel.is-light .picker-trigger {
    background-color: rgba(0,0,0,0.1);
    color: #1a1a1a;
}
.color-panel.is-light .picker-trigger:hover {
    background-color: rgba(0,0,0,0.2);
}

.color-formats-container {
    width: 115px; 
}
.color-format-box {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 6px 8px;
    cursor: pointer;
    transition: all 0.2s;
    color: #ffffff;
}
.color-format-box:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}
.color-panel.is-light .color-format-box {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
    color: #1a1a1a;
}
.color-panel.is-light .color-format-box:hover {
    background: rgba(0, 0, 0, 0.15);
}

.format-label {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    opacity: 0.7;
    line-height: 1;
    margin-bottom: 2px;
}
.format-value {
    font-size: 0.75rem; 
    font-weight: 500;
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1;
}
.format-copy-icon {
    font-size: 0.8rem;
    opacity: 0.5;
    transition: opacity 0.2s;
}
.color-format-box:hover .format-copy-icon {
    opacity: 1;
}

/* =================================================================
 * 独立したアクションボタン（基準色、ロック、削除）
 * ================================================================= */
.standalone-base-btn {
    background: rgba(255, 255, 255, 0.2);
    width: 36px;
    height: 36px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.standalone-action-btn {
    background: rgba(255, 255, 255, 0.15);
    width: 36px;
    height: 36px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.color-panel.is-light .standalone-base-btn,
.color-panel.is-light .standalone-action-btn {
    background: rgba(0, 0, 0, 0.1);
}

.btn-action {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    color: #ffffff;
    font-size: 1.1rem;
    position: relative;
    transition: background 0.2s, transform 0.1s;
}
.btn-action:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.15);
}
.color-panel.is-light .btn-action { color: #1a1a1a; }
.color-panel.is-light .btn-action:hover { background: rgba(0, 0, 0, 0.2); }

.history-group-title {
    font-size: 0.75rem;
    font-weight: bold;
    color: var(--bs-secondary-color);
    margin-bottom: 0.5rem;
    margin-top: 1.5rem;
    letter-spacing: 0.5px;
}
.history-group-title:first-child {
    margin-top: 0;
}
.history-item {
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color-translucent);
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}
.history-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
}
.history-palette-preview {
    display: flex;
    height: 28px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 10px;
    border: 1px solid rgba(0,0,0,0.1);
}
.history-color-chunk {
    flex: 1;
}

@media (max-height: 600px) {
    .color-panel {
        padding-top: 20px;
        padding-bottom: 20px;
    }
    .hex-hash,
    .input-hex {
        font-size: 1.4rem;
    }
    .input-hex {
        width: 6ch;
    }
    .base-badge {
        top: 40px;
    }
    .btn-action {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }
    .color-formats-container {
        width: 85px;
    }
    .format-value {
        font-size: 0.5rem;
    }
}

.add-panel-btn {
    position: absolute;
    right: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #fff;
    color: #333;
    border: 1px solid #ccc;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s, transform 0.2s;
}
.color-panel:hover .add-panel-btn { opacity: 1; }
.add-panel-btn:hover { transform: translateY(-50%) scale(1.2); opacity: 1; }
.color-panel:last-child .add-panel-btn { display: none; }

.color-panel.is-locked .role-select-wrapper,
.color-panel.is-locked .standalone-base-btn,
.color-panel.is-locked .btn-delete,
.color-panel.is-locked .picker-trigger {
    pointer-events: none;
    opacity: 0.3;
}
.color-panel.is-locked .hex-hash,
.color-panel.is-locked .input-hex,
.color-panel.is-locked .color-formats-container {
    opacity: 0.6;
}

/* =================================================================
 * プレビュー用 CSS変数とスタイル設定
 * ================================================================= */
#previewArea {
    --p-bg: #FFFFFF;
    --p-text: #333333;
    --p-primary: #0d6efd;
    --p-secondary: #6c757d;
    --p-accent: #ffc107;
    --p-other: #17a2b8;
    --p-on-primary: #FFFFFF;
    --p-on-secondary: #FFFFFF;
    --p-on-accent: #000000;
}

.bg-p-bg { background-color: var(--p-bg); }
.bg-p-primary { background-color: var(--p-primary); }
.bg-p-secondary { background-color: var(--p-secondary); }
.bg-p-accent { background-color: var(--p-accent); }
.bg-p-other { background-color: var(--p-other); }

.text-p-text { color: var(--p-text); }
.text-p-primary { color: var(--p-primary); }
.text-p-secondary { color: var(--p-secondary); }
.text-p-accent { color: var(--p-accent); }
.text-p-on-primary { color: var(--p-on-primary); }
.text-p-on-secondary { color: var(--p-on-secondary); }
.text-p-on-accent { color: var(--p-on-accent); }

.border-p-primary { border-color: var(--p-primary) !important; }
.border-p-secondary { border-color: var(--p-secondary) !important; }
.border-p-accent { border-color: var(--p-accent) !important; }

.preview-content-box {
    transition: opacity 0.3s;
    font-family: system-ui, -apple-system, sans-serif;
}
.aspect-ratio-16-9 {
    aspect-ratio: 16 / 9;
}
.preview-border {
    border-color: color-mix(in srgb, var(--p-text) 15%, transparent) !important;
}
.preview-hero-bg {
    background: linear-gradient(135deg, color-mix(in srgb, var(--p-primary) 8%, var(--p-bg)), var(--p-bg));
}
.preview-badge-accent {
    background-color: color-mix(in srgb, var(--p-accent) 20%, var(--p-bg));
    color: var(--p-accent);
    border: 1px solid var(--p-accent);
}
.btn-p-primary {
    background-color: var(--p-primary);
    color: var(--p-on-primary);
}
.btn-p-secondary {
    background-color: var(--p-secondary);
    color: var(--p-on-secondary);
}
.preview-list li { margin-bottom: 0.5rem; }
.preview-list li::marker { color: var(--p-accent); }

/* preview.php 内の HTML保存ボタン専用 */
#btnDownloadPreview.btn-outline-secondary {
    background-color: transparent;
    border-color: rgba(108, 117, 125, 0.3) !important;
    color: var(--bs-secondary-color);
}

#btnDownloadPreview.btn-outline-secondary:hover {
    background-color: var(--bs-secondary-bg);
    border-color: var(--bs-secondary-color) !important;
    color: var(--bs-emphasis-color);
    transform: translateY(-1px);
}


/* =================================================================
 * モバイル対応 (max-width: 768px)
 * 色パネルを縦並びストライプ化＋内部要素の重なり完全解消
 * ================================================================= */
@media (max-width: 768px) {

    /* === main の高さ制約を解除 === */
    #app-main-content {
        height: auto !important;
        min-height: calc(100vh - 56px);
        overflow: visible !important;
    }

    /* === ツールバー: 折返し許可・コンパクト化 === */
    .palette-toolbar {
        flex-wrap: wrap !important;
        gap: 0.4rem !important;
        padding: 0.6rem 0.5rem !important;
    }
    .palette-toolbar h1 {
        font-size: 0.8rem !important;
        flex-shrink: 0;
    }
    .palette-toolbar h1 i {
        font-size: 1.1rem !important;
        margin-right: 0 !important;
    }
    .palette-toolbar .form-select,
    .palette-toolbar select {
        font-size: 0.8rem !important;
        min-width: auto !important;
        padding-left: 0.6rem !important;
        padding-right: 1.5rem !important;
    }
    .palette-toolbar #presetSelect {
        min-width: 100px !important;
    }
    .palette-toolbar .btn-sm {
        font-size: 0.75rem !important;
        padding: 0.25rem 0.5rem !important;
    }
    .palette-toolbar .dropdown .dropdown-menu {
        width: min(340px, 92vw) !important;
    }

    /* === 色パネルコンテナ: 縦並びストライプ === */
    #colorPanelsContainer {
        flex-direction: column !important;
        min-height: 60vh;
    }

    /* === 各色パネル: 横長ストライプ。高さを抑えて重なり解消 === */
    .color-panel {
        flex: 0 0 auto !important;
        min-width: 0 !important;
        min-height: 120px !important;
        padding: 14px 12px !important;
    }
    .color-panel.role-stock {
        flex: 0 0 60px !important;
        min-height: 60px;
    }

    /* role-select-wrapper を絶対配置で左上に固定（中央の重なり回避） */
    .color-panel .role-select-wrapper {
        position: absolute !important;
        top: 6px !important;
        left: 6px !important;
        right: auto !important;
        width: auto !important;
        padding: 0 !important;
        z-index: 5;
    }
    .color-panel .role-select-wrapper select {
        font-size: 0.65rem !important;
        padding: 1px 18px 1px 6px !important;
        background-position: right 4px center !important;
        min-width: auto !important;
        width: auto !important;
    }

    /* BASE / Stock バッジを右上に固定 */
    .color-panel .base-badge,
    .color-panel .stock-badge {
        position: absolute !important;
        top: 6px !important;
        right: 6px !important;
        left: auto !important;
        bottom: auto !important;
        font-size: 0.55rem !important;
        padding: 2px 6px !important;
        line-height: 1.3 !important;
    }

    /* === パネル中央のメインコンテンツ === */
    /* gap を詰めて要素同士の余白を縮小 */
    .color-panel > .d-flex.flex-column {
        gap: 0.5rem !important;
        padding-top: 18px !important;
        padding-bottom: 4px !important;
    }

    /* HEX 表示: 縮小して重なり防止 */
    .color-panel .hex-hash,
    .color-panel .input-hex {
        font-size: 1.2rem !important;
    }
    .color-panel .input-hex {
        width: 5.5ch !important;
    }
    .color-panel .picker-trigger {
        width: 26px !important;
        height: 26px !important;
        margin-left: 0.4rem !important;
    }
    .color-panel .picker-trigger i {
        font-size: 0.8rem !important;
    }

    /* BASE 設定の星 + アクションボタン: 縮小 */
    .color-panel .btn-set-base.standalone-base-btn {
        width: 30px !important;
        height: 30px !important;
        font-size: 0.85rem !important;
    }
    .color-panel .btn-action.standalone-action-btn {
        width: 30px !important;
        height: 30px !important;
        font-size: 0.8rem !important;
    }

    /* === フォーマット表示エリア: 横並び3列で確実に配置 === */
    .color-panel .color-formats-container {
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        justify-content: center !important;
        align-items: stretch !important;
        gap: 4px !important;
        width: calc(100% - 16px) !important;
        max-width: 360px !important;
        margin-top: 0 !important;
    }
    .color-panel .color-format-box {
        flex: 1 1 0 !important;
        min-width: 0 !important;
        max-width: none !important;
        padding: 3px 5px !important;
        gap: 2px !important;
        overflow: hidden;
        background-color: rgba(255, 255, 255, 0.15);
        border-radius: 4px;
    }
    .color-panel.is-light .color-format-box {
        background-color: rgba(0, 0, 0, 0.08);
    }
    .color-panel .color-format-box > .d-flex.flex-column {
        min-width: 0 !important;
        flex: 1 1 0 !important;
        overflow: hidden;
    }
    .color-panel .color-format-box .format-label {
        font-size: 0.5rem !important;
        line-height: 1.1 !important;
        opacity: 0.7;
    }
    .color-panel .color-format-box .format-value {
        font-size: 0.65rem !important;
        line-height: 1.2 !important;
        white-space: nowrap !important;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .color-panel .color-format-box .format-copy-icon {
        font-size: 0.65rem !important;
        flex-shrink: 0;
    }

    /* === 「+ 追加」ボタンの位置をパネル下部中央に === */
    .add-panel-btn {
        right: 50% !important;
        bottom: -14px !important;
        top: auto !important;
        transform: translateX(50%);
        width: 28px !important;
        height: 28px !important;
        z-index: 6;
    }

    /* === FAB: 控えめ・小型 === */
    .floating-action-menu.fab-container {
        right: 10px !important;
        bottom: 10px !important;
        padding: 6px !important;
        gap: 0.4rem !important;
    }
    .fab-btn {
        width: 38px !important;
        height: 38px !important;
    }
    .fab-btn .fs-5 {
        font-size: 0.85rem !important;
    }

    /* === ヘルプ Offcanvas はほぼフル幅 === */
    #helpOffcanvas {
        width: 94vw !important;
    }

    /* === プレビューモーダル: スマホ用調整 === */
    #previewModal .modal-dialog {
        padding: 0 !important;
    }
    #previewModal .modal-content {
        border-radius: 0 !important;
    }
}

/* さらに狭い端末（〜380px）の追加調整 */
@media (max-width: 380px) {
    .palette-toolbar {
        padding: 0.5rem 0.4rem !important;
    }
    .palette-toolbar #presetSelect {
        min-width: 85px !important;
    }
    .color-panel {
        padding: 12px 8px !important;
    }
    .color-panel .hex-hash,
    .color-panel .input-hex {
        font-size: 1.1rem !important;
    }
    .color-panel .color-format-box .format-value {
        font-size: 0.58rem !important;
    }
}

/* =================================================================
 * モバイル対応: プレビュー (preview.php)
 * ================================================================= */
@media (max-width: 768px) {
    /* プレビューモーダル全体の余白を詰める */
    #previewArea {
        padding: 1rem !important;
    }

    /* プレビュー上部のモード切替バー: 折返し許可 */
    #previewModal .position-sticky.top-0 {
        flex-wrap: wrap !important;
        gap: 0.5rem !important;
        padding: 0.5rem 0.75rem !important;
    }
    #previewModal .position-sticky.top-0 > div[style*="width: 150px"] {
        width: auto !important;
        flex-shrink: 0;
    }
    #previewModal .btn-group .btn {
        padding: 0.3rem 0.6rem !important;
        font-size: 0.72rem !important;
    }
    #previewModal #btnDownloadPreview {
        padding: 0.3rem 0.8rem !important;
        font-size: 0.7rem !important;
    }
    /* モード切替のボタンラベル内アイコンの余白を詰める */
    #previewModal .btn-group .btn i {
        margin-right: 0.25rem !important;
    }

    /* === プレビュー本体: フォントとパディングをモバイル向けに === */
    .preview-content-box {
        max-width: 100% !important;
        gap: 2rem !important;
    }
    .preview-content-box .preview-hero-bg {
        min-height: 260px !important;
        padding: 1.5rem 1rem !important;
    }
    .preview-content-box .display-5,
    .preview-content-box .display-6,
    .preview-content-box .display-4 {
        font-size: 1.4rem !important;
        line-height: 1.3 !important;
    }
    .preview-content-box h1,
    .preview-content-box h2 {
        font-size: 1.3rem !important;
    }
    .preview-content-box h3 {
        font-size: 1.1rem !important;
    }
    .preview-content-box h4 {
        font-size: 1rem !important;
    }
    .preview-content-box .lead {
        font-size: 0.9rem !important;
    }
    .preview-content-box .fs-4 {
        font-size: 1.15rem !important;
    }
    .preview-content-box .p-5 {
        padding: 1.25rem !important;
    }
    .preview-content-box .py-5 {
        padding-top: 1.25rem !important;
        padding-bottom: 1.25rem !important;
    }
    .preview-content-box .px-4 {
        padding-left: 0.75rem !important;
        padding-right: 0.75rem !important;
    }
    .preview-content-box .mb-5 {
        margin-bottom: 1rem !important;
    }
    /* ヘッダー: 装飾用の絶対配置エフェクトはスマホで縮小 */
    .preview-content-box [style*="width: 400px"] {
        width: 180px !important;
        height: 180px !important;
    }
}

/* =================================================================
 * モバイル対応: デザインプレビューのグリッド強制縦並び
 * preview.php 内の主要セクション（Core Features / Pricing / Steps /
 * Hero CTA / TRUSTED BY 等）はすべて d-flex.gap-* で横並びに作られて
 * いるため、スマホでは flex-direction: column に強制する
 * ================================================================= */
@media (max-width: 768px) {

    /* --- 主要セクションコンテナ: .p-5.d-flex は基本縦に --- */
    .preview-content-box .p-5.d-flex {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 1rem !important;
        padding: 1.25rem 0.75rem !important;
    }

    /* --- Core Features / About / 比較セクションなど (gap-4, gap-5 系) --- */
    .preview-content-box .d-flex.gap-4,
    .preview-content-box .d-flex.gap-5 {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 1rem !important;
    }
    /* 細かな子要素 d-flex.gap-2 / gap-3（バッジ・アイコン・ボタン2つ並べ等）は横並び維持 */
    .preview-content-box .d-flex.gap-2,
    .preview-content-box .d-flex.gap-3:not(.justify-content-center) {
        flex-direction: row !important;
    }
    /* ただし、Pricing 等の主要グリッドコンテナ（flex-1 子要素を持つ gap-3）は縦に */
    .preview-content-box .d-flex.gap-3.max-w-4xl,
    .preview-content-box .d-flex.gap-3.align-items-end,
    .preview-content-box .d-flex.gap-3.mx-auto {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 1rem !important;
    }

    /* --- flex-1 子要素を 100% に。Pricing Pro の transform もリセット --- */
    .preview-content-box .flex-1 {
        flex: 0 0 auto !important;
        width: 100% !important;
        max-width: 100% !important;
        transform: none !important;
    }

    /* --- w-25 / w-50 / w-60 / w-75 を 100% に --- */
    .preview-content-box .w-25,
    .preview-content-box .w-50,
    .preview-content-box .w-60,
    .preview-content-box .w-75 {
        width: 100% !important;
        max-width: 100% !important;
    }

    /* --- Hero CTA ボタン群（横並び → 縦並び・ボタン全幅） --- */
    .preview-content-box .preview-hero-bg .d-flex.justify-content-center.gap-3 {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0.5rem !important;
        width: 100%;
    }
    .preview-content-box .preview-hero-bg .d-flex.justify-content-center.gap-3 .btn {
        width: 100% !important;
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
        padding: 0.6rem 1rem !important;
    }

    /* --- TRUSTED BY ロゴ列 (gap-5 のアイコンセット) は折返しに --- */
    .preview-content-box .d-flex.justify-content-center.gap-5 {
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 1.25rem !important;
    }

    /* --- Hero (再調整) --- */
    .preview-content-box .preview-hero-bg {
        min-height: 220px !important;
        padding: 1.25rem 0.75rem !important;
    }

    /* --- 装飾の絶対配置 blur 円: 縮小 --- */
    .preview-content-box [style*="width: 400px"] {
        width: 150px !important;
        height: 150px !important;
        top: -50px !important;
        right: -50px !important;
    }

    /* --- カード内のアイコンサイズを抑える --- */
    .preview-content-box .rounded-circle[style*="width: 64px"] {
        width: 48px !important;
        height: 48px !important;
        font-size: 1.25rem !important;
        margin-bottom: 0.75rem !important;
    }

    /* --- Pricing Pro: transform: translateY(-10px) や transform-scale を解除 --- */
    .preview-content-box .transform-scale,
    .preview-content-box .z-2 {
        transform: none !important;
    }

    /* --- Pricing 価格表示の大文字を抑制 --- */
    .preview-content-box .fs-1 {
        font-size: 1.5rem !important;
    }
    .preview-content-box .fs-2 {
        font-size: 1.3rem !important;
    }

    /* --- スライド (#previewSlide) も全体的に縦並び --- */
    #previewSlide .d-flex:not(.flex-column):not(.align-items-center):not(.gap-2):not(.gap-3) {
        flex-direction: column !important;
        align-items: stretch !important;
    }
    #previewSlide .flex-1 {
        flex: 0 0 auto !important;
        width: 100% !important;
        max-width: 100% !important;
    }
    /* スライドのステップタイムライン（基盤構築 / ベータテスト / 正式リリース / グローバル展開）も縦に */
    #previewSlide .row > [class*="col-"] {
        flex: 0 0 100% !important;
        max-width: 100% !important;
        margin-bottom: 1rem;
    }
}

/* =================================================================
 * 共通ヘッダー/シェアセクション/フッターの無彩色化（colorpalette 専用）
 * ---------------------------------------------------------------------
 * 配色作業中に共通UIのマッハーバイオレット色（および SNS シェアボタンの
 * ブランドカラー）が「生成パレットの認識」を妨げないよう、grayscale
 * フィルターで完全にグレースケール化する。
 *
 * ターゲット: body 直下の .theme-mach-violet（header / シェア用 aside /
 * footer の3要素すべてに付与されている共通クラス）。
 * filter は子孫要素にも継承されるため、ロゴ・SNSボタン・テキスト全て
 * が自動でグレースケールになる。
 * ================================================================= */
body > .theme-mach-violet {
    filter: grayscale(1);
    -webkit-filter: grayscale(1);
}

/* --- ツールバー左のロゴアイコン（bi-palette-fill）も無彩色化 ---
   このツール自体が「色を作る場所」なので、アイデンティティとなる
   バイオレットすら消して、生成パレットの色判断を阻害しない */
.palette-toolbar h1 i {
    filter: grayscale(1);
    -webkit-filter: grayscale(1);
}

/* --- プリセットドロップダウンを無彩色化 ---
   各オプション先頭に 🎨 などの絵文字（OS依存のカラー表示）が
   含まれており、プリセット選択時の色イメージを乱すため grayscale 化 */
#presetSelect,
#presetSelect option {
    filter: grayscale(1);
    -webkit-filter: grayscale(1);
}