/**
 * InlineDrawingSystem - 共通メモパッドCSS
 *
 * 単元学習モード・復習モード共通で使用するメモパッドスタイル
 *
 * @version 1.0.0
 * @since 2026-05-16
 */

/* === CSS変数（必要に応じてオーバーライド可能） === */
:root {
    --memo-primary-blue: #2563eb;
    --memo-border-color: #e2e8f0;
    --memo-success-green: #22c55e;
    --memo-error-red: #ef4444;
    --memo-text-primary: #334155;
    --memo-text-secondary: #64748b;
}

/* === メモパッド（Canvas描画システム） === */
.memo-pad.inline-drawing {
    display: flex;
    flex-direction: column;
    position: relative;
    background: #ffffff;
    border: 1px solid #d0d7de;
    border-radius: 12px;
    overflow: hidden;
    height: auto !important;
    min-height: 180px;
}

/* === ツールバー === */
.memo-pad.inline-drawing .memo-toolbar {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 2px 10px;
    background: #f8fafc;
    border-bottom: 1px solid var(--memo-border-color, #e2e8f0);
    border-radius: 11px 11px 0 0;
    flex-wrap: wrap;
    min-height: 32px;
    flex-shrink: 0;
    /* ダブルタップズーム無効化 */
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

.memo-pad.inline-drawing .tools-group,
.memo-pad.inline-drawing .colors-group,
.memo-pad.inline-drawing .actions-group,
.memo-pad.inline-drawing .finger-drawing-group,
.memo-pad.inline-drawing .zoom-control-group {
    display: flex;
    gap: 4px;
    align-items: center;
}

/* === ツールボタン === */
.memo-pad.inline-drawing .tool-btn {
    min-width: 24px;
    height: 24px;
    padding: 2px 6px;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
}

.memo-pad.inline-drawing .tool-icon {
    width: 16px;
    height: 16px;
    display: block;
    pointer-events: none;
}

.memo-pad.inline-drawing .tool-btn:hover {
    background: #f1f5f9;
}

.memo-pad.inline-drawing .tool-btn.active {
    background: var(--memo-primary-blue, #2563eb);
    color: white;
}

/* === 色ボタン === */
.memo-pad.inline-drawing .color-btn {
    width: 16px;
    height: 16px;
    border: 2px solid #d0d7de;
    border-radius: 50%;
    background: var(--color);
    cursor: pointer;
    transition: all 0.15s ease;
    position: relative;
    -webkit-appearance: none;
    appearance: none;
    padding: 4px;
    box-sizing: border-box;
    background-clip: content-box;
    touch-action: manipulation;
}

.memo-pad.inline-drawing .color-btn:hover {
    transform: scale(1.1);
}

.memo-pad.inline-drawing .color-btn.active {
    box-shadow: 0 0 0 2px var(--memo-primary-blue, #2563eb);
}

/* === ペンサイズ === */
.memo-pad.inline-drawing .pen-size {
    padding: 2px 4px;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    font-size: 11px;
    flex-shrink: 0;
    width: auto;
    max-width: 60px;
    color: var(--memo-text-secondary, #64748b);
    touch-action: manipulation;
}

.memo-pad.inline-drawing .pen-size:hover {
    background: #f1f5f9;
}

/* === アクションボタン === */
.memo-pad.inline-drawing .action-btn {
    padding: 2px 4px;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.15s ease;
    touch-action: manipulation;
}

.memo-pad.inline-drawing .action-btn:hover {
    background: #f1f5f9;
}

.memo-pad.inline-drawing .clear-btn:hover {
    background: #fef2f2;
    color: var(--memo-error-red, #ef4444);
}

/* === 指描画トグル === */
.memo-pad.inline-drawing .finger-toggle-btn {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 2px 4px;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    font-size: 10px;
    font-weight: 500;
    transition: all 0.15s ease;
    min-width: 40px;
    touch-action: manipulation;
}

.memo-pad.inline-drawing .finger-toggle-btn:hover {
    background: #f1f5f9;
}

.memo-pad.inline-drawing .finger-toggle-btn.active {
    background: var(--memo-primary-blue, #2563eb);
    color: #ffffff;
}

.memo-pad.inline-drawing .finger-toggle-btn.disabled {
    background: transparent;
    color: var(--memo-text-secondary, #64748b);
    opacity: 0.6;
}

.memo-pad.inline-drawing .finger-icon {
    font-size: 12px;
    line-height: 1;
}

.memo-pad.inline-drawing .finger-status {
    font-size: 9px;
    font-weight: 600;
    text-transform: uppercase;
}

/* === ズームコントロール === */
.memo-pad.inline-drawing .zoom-display {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 2px 4px;
    border: none;
    border-radius: 4px;
    background: transparent;
    font-size: 9px;
    font-weight: 500;
    color: var(--memo-text-secondary, #64748b);
    min-width: 40px;
    justify-content: center;
}

.memo-pad.inline-drawing .zoom-icon {
    font-size: 10px;
    opacity: 0.7;
}

.memo-pad.inline-drawing .zoom-value {
    font-weight: 600;
    color: var(--memo-text-primary, #334155);
    font-family: monospace;
    font-size: 10px;
}

.memo-pad.inline-drawing .zoom-reset-btn {
    padding: 2px 4px;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    font-size: 10px;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
}

.memo-pad.inline-drawing .zoom-reset-btn:hover {
    background: #f1f5f9;
}

.memo-pad.inline-drawing .reset-icon {
    display: block;
    line-height: 1;
}

/* === 描画ステージ === */
.memo-pad.inline-drawing .drawing-stage {
    position: relative;
    flex: 1 1 auto;
    min-height: 250px;
    background: #ffffff;
    overflow: hidden;
}

@media (max-width: 480px) {
    .memo-pad.inline-drawing .drawing-stage {
        min-height: 180px;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .memo-pad.inline-drawing .drawing-stage {
        min-height: 220px;
    }
}

@media (min-width: 769px) {
    .memo-pad.inline-drawing .drawing-stage {
        min-height: 250px;
    }
}

/* === 拡張時のメモパッドサイズ === */
.memo-pad.inline-drawing.large-default {
    height: auto !important;
    min-height: 90vh !important;
    max-height: none !important;
}

.memo-pad.inline-drawing.large-default .drawing-stage {
    min-height: calc(90vh - 60px) !important;
    flex: 1 !important;
}

/* === Canvas === */
.memo-pad.inline-drawing .drawing-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    cursor: crosshair;
    /* 縦スクロールを許可、描画確定時のみJSでpreventDefault */
    touch-action: pan-y;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    display: block;
    overflow: hidden;
    z-index: 1;
    box-sizing: border-box;
}

.memo-pad.inline-drawing .drawing-canvas.pen-mode {
    cursor: crosshair;
}

.memo-pad.inline-drawing .drawing-canvas.eraser-mode {
    cursor: grab;
}

/* === Apple Pencil / タッチ選択防止 === */
.memo-pad.inline-drawing .drawing-canvas,
.memo-pad.inline-drawing .drawing-stage {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: none;
}

/* メモパッド全体のテキスト選択防止 */
.memo-pad.inline-drawing {
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

/* === メモパッド拡張ボタン（ツールバー内） === */
.memo-pad.inline-drawing .expand-group {
    display: flex;
    align-items: center;
}

.memo-pad.inline-drawing .expand-toggle-btn {
    min-width: 24px;
    height: 24px;
    padding: 2px;
    border: 1px solid #d0d7de;
    border-radius: 4px;
    background: #f8fafc;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    touch-action: manipulation;
}

.memo-pad.inline-drawing .expand-toggle-btn:hover {
    background: #e2e8f0;
    border-color: #94a3b8;
}

.memo-pad.inline-drawing .expand-toggle-btn:active {
    background: #cbd5e1;
    transform: scale(0.95);
}

/* 拡張状態のボタン */
.memo-pad.inline-drawing.large-default .expand-toggle-btn,
.memo-pad.inline-drawing.memo-expanded .expand-toggle-btn {
    background: var(--memo-primary-blue, #2563eb);
    border-color: var(--memo-primary-blue, #2563eb);
}

.memo-pad.inline-drawing.large-default .expand-toggle-btn:hover,
.memo-pad.inline-drawing.memo-expanded .expand-toggle-btn:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
}

.memo-pad.inline-drawing .expand-icon {
    width: 14px;
    height: 14px;
    display: block;
    pointer-events: none;
    opacity: 0.8;
}

.memo-pad.inline-drawing .expand-toggle-btn:hover .expand-icon {
    opacity: 1;
}

/* 拡張状態ではアイコンを白に */
.memo-pad.inline-drawing.large-default .expand-toggle-btn .expand-icon,
.memo-pad.inline-drawing.memo-expanded .expand-toggle-btn .expand-icon {
    filter: brightness(0) invert(1);
    opacity: 1;
}

/* === 旧・メモパッド拡張ボタン（非推奨・後方互換用） === */
.memo-pad.inline-drawing .memo-expand-ui {
    position: absolute;
    bottom: 8px;
    left: 8px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(249, 249, 249, 0.95);
    border: 2px solid #e1e4e8;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 20;
    user-select: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
    touch-action: manipulation;
}

.memo-pad.inline-drawing .memo-expand-ui:hover {
    background: rgba(225, 228, 232, 0.95);
    transform: scale(1.1);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.18);
}

.memo-pad.inline-drawing .memo-expand-ui:active {
    background: rgba(209, 213, 218, 0.95);
    transform: scale(0.95);
}

.memo-pad.inline-drawing .memo-expand-ui .expand-icon {
    width: 16px;
    height: 16px;
    opacity: 0.7;
}

.memo-pad.inline-drawing .memo-expand-ui:hover .expand-icon {
    opacity: 1;
}

/* === 背景画像制御ボタン === */
.memo-pad.inline-drawing .background-control-group {
    display: none; /* 背景画像がある場合のみ表示 */
    gap: 4px;
    align-items: center;
}

.memo-pad.inline-drawing .bg-toggle-btn,
.memo-pad.inline-drawing .bg-size-up-btn,
.memo-pad.inline-drawing .bg-size-down-btn {
    padding: 2px 4px;
    border: 1px solid transparent;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.15s ease;
    touch-action: manipulation;
}

.memo-pad.inline-drawing .bg-toggle-btn:hover,
.memo-pad.inline-drawing .bg-size-up-btn:hover,
.memo-pad.inline-drawing .bg-size-down-btn:hover {
    background: #f1f5f9;
}

.memo-pad.inline-drawing .bg-toggle-btn.active {
    background: var(--memo-primary-blue, #2563eb);
    color: white;
}

/* === ズーム中の状態表示 === */
.memo-pad.inline-drawing.zooming .drawing-canvas {
    cursor: grabbing;
}

.memo-pad.inline-drawing .zoom-display.updated {
    animation: zoom-pulse 0.3s ease;
}

@keyframes zoom-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}