:root {
    --bg-dark: #0a0e14;
    --card-bg: #161b22;
    --accent-gold: #d4af37;
    --accent-blue: #0070f3;
    --text-main: #e6edf3;
    --text-muted: #8b949e;
    --border-color: rgba(212, 175, 55, 0.2);
    --btn-buy: #238636;
    --btn-sell: #da3633;
    --btn-saw: #1f6feb;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    margin: 0;
    line-height: 1.4;
    font-size: 13px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 10px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.main-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 20px;
    align-items: start;
}

/* モバイル対応：600px以下は1カラムにスタック */
@media (max-width: 600px) {
    .main-layout {
        display: flex;
        flex-direction: column-reverse; /* 相場一覧を上に、報告フォームを下へ */
        gap: 30px;
    }
    
    .stats-section, .wizard-section {
        width: 100%;
    }

    .item-group {
        grid-template-columns: 1fr 1fr; /* モバイルでもボタンは2列程度に */
    }
}

.stats-section {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 15px;
    border: 1px solid var(--border-color);
}

.section-title {
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--accent-gold);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-left: 4px solid var(--accent-gold);
    padding-left: 10px;
}

.period-nav {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.05);
    padding: 5px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

@media (max-width: 600px) {
    .page-header {
        justify-content: center;
        text-align: center;
    }
    .period-nav {
        width: 100%;
        justify-content: space-between;
        margin-top: 5px;
    }
}

.btn-nav {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--accent-gold);
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
}

/* 統計カード */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    margin-bottom: 20px;
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr; /* スマホでは2列固定 */
        gap: 8px;
    }
    
    .item-card {
        padding: 10px 8px;
        min-width: 0; /* スマホでは親の幅に従う */
    }

    .item-name {
        font-size: 0.75rem;
    }
}

/* 超小型画面（320px以下）への対応 */
@media (max-width: 320px) {
    .stats-grid {
        grid-template-columns: 1fr; /* 320pxでは1列にして文字を横に広く使う */
    }
}

.item-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    cursor: pointer;
    transition: 0.2s;
    display: flex;
    flex-direction: column;
    gap: 5px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.item-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--accent-gold);
}

.card-saw-only {
    background: rgba(31, 111, 235, 0.05); /* わずかに青み */
    border: 1px solid rgba(31, 111, 235, 0.2);
}

.card-saw-only:hover {
    border-color: var(--btn-saw);
}

.item-name {
    font-weight: bold;
    color: var(--accent-gold);
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 25px;
}

.reliability {
    position: absolute;
    top: 10px;
    right: 8px;
    font-size: 0.75rem;
}

.price-box {
    margin-top: 5px;
}

.avg-price {
    font-size: 1rem;
    font-weight: 700;
}

.range-price {
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* 報告セクション (スクショの見た目を再現) */
.report-section {
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 12px;
    padding: 20px;
    margin-top: 30px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
}

.report-title {
    color: var(--accent-gold);
    font-size: 1.1rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.guide-text {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 15px;
}

.wizard-step {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* アイテム選択行 (武器が縦軸、01/12が横軸) */
.item-group {
    display: grid;
    grid-template-columns: 75px 1fr 1fr; /* ラベル 0→1 1→2 */
    gap: 4px;
    align-items: center;
    background: rgba(255,255,255,0.03);
    padding: 3px;
    border-radius: 4px;
    margin-bottom: 2px;
}

.item-group-label {
    font-size: 0.7rem;
    color: var(--accent-gold);
    text-align: left;
    padding-left: 5px;
    font-weight: bold;
}

.btn-item {
    background: #21262d;
    border: 1px solid #30363d;
    color: white;
    padding: 6px 2px;
    border-radius: 3px;
    font-size: 0.75rem;
    text-align: center;
    cursor: pointer;
    width: 100%;
}

.btn-item:active { background: var(--accent-gold); color: black; }

.btn-action {
    padding: 15px;
    font-weight: bold;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
}

.btn-buy { background: var(--btn-buy); }
.btn-sell { background: var(--btn-sell); }
.btn-saw { background: var(--btn-saw); }

.price-input-area {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-field {
    width: 100%;
    padding: 12px;
    background: #0d1117;
    border: 1px solid #30363d;
    color: white;
    font-size: 1.1rem;
    border-radius: 8px;
    text-align: center;
}

/* モーダル表示中は背景を固定 */
body.modal-open {
    overflow: hidden;
}

.description-area {
    margin-top: 20px;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.6;
    border: 1px solid rgba(212, 175, 55, 0.1);
}

.description-area summary {
    padding: 12px 15px;
    cursor: pointer;
    font-weight: bold;
    color: var(--accent-gold);
    list-style: none; /* デフォルトの矢印を消す */
    outline: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.description-area summary::after {
    content: '\f078'; /* font-awesome chevron-down */
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 0.7rem;
    transition: transform 0.3s;
}

.description-area[open] summary::after {
    transform: rotate(180deg);
}

.description-area summary:hover {
    background: rgba(212, 175, 55, 0.05);
}

.description-area > div {
    padding: 0 15px 15px 15px;
}

/* 詳細モーダル */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.85);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    padding: 20px;
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--accent-gold);
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,1);
}

.detail-table {
    width: 100%;
    margin-top: 15px;
    border-collapse: collapse;
}

.detail-table th, .detail-table td {
    padding: 10px 5px;
    border-bottom: 1px solid #30363d;
    text-align: left;
}

.detail-table th { color: var(--text-muted); font-weight: normal; font-size: 0.75rem; }
.detail-table td { font-weight: bold; font-size: 1rem; }

/* 320px対応 */
@media (max-width: 350px) {
    .btn-grid { grid-template-columns: repeat(2, 1fr); }
}