/* ═══════════════════════════════════════════════════
   StudyProgressUI — 進捗可視化コンポーネント用スタイル
   ═══════════════════════════════════════════════════ */

/* ─── カラーパレット ──────────────────────────────── */
:root {
    --sp-level-0: #6b7280;
    --sp-level-1: #ef4444;
    --sp-level-2: #f59e0b;
    --sp-level-3: #eab308;
    --sp-level-4: #22c55e;

    --sp-bg-primary: rgba(15, 23, 42, 0.6);
    --sp-bg-secondary: rgba(30, 41, 59, 0.8);
    --sp-bg-card: rgba(30, 41, 59, 0.5);
    --sp-text-primary: #f1f5f9;
    --sp-text-secondary: #94a3b8;
    --sp-border: rgba(100, 116, 139, 0.3);
    --sp-radius: 12px;
    --sp-radius-sm: 8px;
}

/* ─── フィルターバー ─────────────────────────────── */
.sp-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    padding: 12px;
    background: var(--sp-bg-secondary);
    border-radius: var(--sp-radius);
    border: 1px solid var(--sp-border);
}

.sp-filter-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--sp-border);
    border-radius: 20px;
    background: transparent;
    color: var(--sp-text-secondary);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.sp-filter-btn:hover {
    background: rgba(100, 116, 139, 0.2);
    color: var(--sp-text-primary);
}

.sp-filter-btn.active {
    background: rgba(100, 116, 139, 0.3);
    color: var(--sp-text-primary);
    border-color: var(--filter-color, var(--sp-text-secondary));
    box-shadow: 0 0 12px rgba(100, 116, 139, 0.15);
}

.sp-level-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* ─── カードグリッド ─────────────────────────────── */
.sp-card-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ─── カード短冊 ─────────────────────────────────── */
.sp-card-strip {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: var(--sp-bg-card);
    border-radius: var(--sp-radius-sm);
    border: 1px solid var(--sp-border);
    border-left: 4px solid var(--strip-color, var(--sp-level-0));
    transition: all 0.2s ease;
    animation: stripSlideIn 0.35s ease-out both;
}

.sp-card-strip.clickable {
    cursor: pointer;
}

.sp-card-strip.clickable:hover {
    background: rgba(51, 65, 85, 0.7);
    transform: translateX(4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

@keyframes stripSlideIn {
    from {
        opacity: 0;
        transform: translateX(-12px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* レベルインジケーター */
.sp-level-indicator {
    width: 6px;
    height: 36px;
    border-radius: 3px;
    flex-shrink: 0;
    transition: height 0.3s ease;
}

/* コンテンツ */
.sp-strip-content {
    flex: 1;
    min-width: 0;
}

.sp-strip-main {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--sp-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sp-strip-sub {
    font-size: 0.8rem;
    color: var(--sp-text-secondary);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* メタ情報 */
.sp-strip-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.sp-level-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
}

.sp-practice-count {
    font-size: 0.75rem;
    color: var(--sp-text-secondary);
    white-space: nowrap;
}

/* 空状態 */
.sp-empty-state {
    text-align: center;
    padding: 40px;
    color: var(--sp-text-secondary);
    font-size: 0.9rem;
}

/* ─── サマリーバー ───────────────────────────────── */
.sp-summary-container {
    padding: 20px;
    background: var(--sp-bg-secondary);
    border-radius: var(--sp-radius);
    border: 1px solid var(--sp-border);
}

.sp-summary-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.sp-summary-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--sp-text-primary);
}

.sp-summary-ratio {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.sp-summary-pct {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--sp-level-4);
}

.sp-summary-detail {
    font-size: 0.82rem;
    color: var(--sp-text-secondary);
}

.sp-summary-empty {
    text-align: center;
    padding: 20px;
    color: var(--sp-text-secondary);
}

/* スタックドバー */
.sp-stacked-bar {
    display: flex;
    height: 14px;
    border-radius: 7px;
    overflow: hidden;
    background: rgba(51, 65, 85, 0.5);
    margin-bottom: 14px;
}

.sp-bar-segment {
    height: 100%;
    transition: width 0.6s ease;
    position: relative;
}

.sp-bar-segment:first-child {
    border-radius: 7px 0 0 7px;
}

.sp-bar-segment:last-child {
    border-radius: 0 7px 7px 0;
}

.sp-bar-segment:only-child {
    border-radius: 7px;
}

/* レジェンド */
.sp-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.sp-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sp-legend-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.sp-legend-label {
    font-size: 0.78rem;
    color: var(--sp-text-secondary);
}

.sp-legend-count {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--sp-text-primary);
}

/* ─── 統計カード ─────────────────────────────────── */
.sp-stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
}

.sp-stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 12px;
    background: var(--sp-bg-card);
    border-radius: var(--sp-radius-sm);
    border: 1px solid var(--sp-border);
    transition: transform 0.2s ease;
}

.sp-stat-card:hover {
    transform: translateY(-2px);
}

.sp-stat-icon {
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.sp-stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--sp-text-primary);
}

.sp-stat-label {
    font-size: 0.75rem;
    color: var(--sp-text-secondary);
    margin-top: 2px;
}

/* ─── レスポンシブ ───────────────────────────────── */
@media (max-width: 600px) {
    .sp-filter-bar {
        gap: 6px;
        padding: 10px;
    }

    .sp-filter-btn {
        padding: 5px 10px;
        font-size: 0.75rem;
    }

    .sp-card-strip {
        padding: 10px 14px;
        gap: 10px;
    }

    .sp-strip-meta {
        flex-direction: column;
        gap: 4px;
        align-items: flex-end;
    }

    .sp-stats-container {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .sp-legend {
        gap: 8px;
    }
}

/* ─── グリッド（タイル）表示モード ─── */
.sp-card-grid.sp-grid-mode {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.sp-grid-mode .sp-card-strip {
    flex-direction: column;
    justify-content: space-between;
    text-align: center;
    padding: 18px 10px 10px 10px;
    height: 140px;
    border: none;
    background: var(--strip-color);
    color: #fff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    animation: stripSlideIn 0.35s ease-out both;
}

.sp-grid-mode .sp-card-strip.clickable:hover {
    transform: translateY(-4px);
    background: var(--strip-color);
    filter: brightness(1.1);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.sp-grid-mode .sp-level-indicator {
    display: none;
}

.sp-grid-mode .sp-strip-main {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.sp-grid-mode .sp-strip-sub {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.75rem;
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

.sp-grid-mode .sp-strip-meta {
    margin-top: auto;
    justify-content: center;
}

.sp-grid-mode .sp-level-badge {
    background: rgba(0, 0, 0, 0.15) !important;
    color: #fff;
    padding: 2px 8px;
    font-size: 0.7rem;
}

.sp-grid-mode .sp-practice-count {
    display: none;
}

.sp-layout-toggle {
    margin-left: auto;
}