:root {
    /* ダークベースの美しいカラースキーム */
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --border-color: #30363d;
    --text-main: #e6edf3;
    --text-muted: #8b949e;
    --primary: #58a6ff;
    --up-color: #3fb950;
    --down-color: #f85149;
    --highlight-bg: rgba(88, 166, 255, 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container { 
    max-width: 600px; /* スマホや小型ウィジェットを想定した幅 */
    margin: 0 auto; 
    padding: 16px; 
    padding-bottom: 40px; 
}

/* Navbar */
.navbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 100;
}
.logo { font-size: 18px; font-weight: 700; color: var(--text-main); letter-spacing: 0.5px; }

/* Dropdowns */
.dropdown {
    background-color: var(--bg-color); color: var(--text-main);
    border: 1px solid var(--border-color); border-radius: 6px;
    padding: 8px 12px; font-size: 14px; outline: none;
    appearance: none; -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%238b949e%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat; background-position: right 10px top 50%;
    background-size: 10px auto; padding-right: 30px;
}
.header-dropdown { padding: 6px 30px 6px 10px; font-size: 13px; font-weight: 600;}

/* Cards */
.card {
    background-color: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 16px; margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.card h2 { font-size: 16px; font-weight: 600; margin-bottom: 12px; display: flex; align-items: center; }
.card .icon { margin-right: 8px; font-size: 18px; }
.placeholder-text { color: var(--text-muted); font-size: 14px; }

/* Highlights Grid */
.highlights-grid { display: flex; flex-direction: column; gap: 12px; }
.highlight-item {
    background: rgba(48, 54, 61, 0.4); border-left: 3px solid var(--primary);
    padding: 12px; border-radius: 6px; font-size: 14px;
}
.highlight-header { display: flex; justify-content: space-between; margin-bottom: 6px; font-weight: 600;}
.highlight-reason { color: var(--text-muted); font-size: 13px; line-height: 1.4; }

/* Controls */
.controls { margin-bottom: 16px; }
.filters { display: flex; gap: 10px; }
.filters .dropdown { flex: 1; }

/* Table */
.table-container { 
    background-color: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: 12px; overflow: hidden;
}
.ranking-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 14px; }
.ranking-table th {
    background-color: rgba(48, 54, 61, 0.5); padding: 12px 10px;
    color: var(--text-muted); font-weight: 500; font-size: 12px; border-bottom: 1px solid var(--border-color);
}
.ranking-table td {
    padding: 12px 10px; border-bottom: 1px solid var(--border-color); vertical-align: middle;
}
.ranking-table tbody tr:last-child td { border-bottom: none; }
.ranking-table tbody tr { transition: background-color 0.2s; cursor: pointer; }
.ranking-table tbody tr:active, .ranking-table tbody tr:hover { background-color: var(--highlight-bg); }

.disclaimer { font-size: 11px; color: var(--text-muted); padding: 10px; text-align: center; }

/* Table columns */
.col-rank { width: 44px; text-align: center; color: var(--text-muted); font-weight: 600; }
.rank-num { background: var(--border-color); color: var(--text-main); font-size: 11px; padding: 3px 7px; border-radius: 10px; }
.rank-top3 { background: var(--primary); color: #fff;}
.col-name { width: auto; }
.stock-name { font-weight: 600; display: block; margin-bottom: 2px; }
.stock-code { font-size: 11px; color: var(--text-muted); }
.col-price { width: 90px; text-align: right; }
.price-val { font-weight: 500; display: block; }
.pct-val { font-size: 12px; font-weight: 600; }
.pct-up { color: var(--up-color); }
.pct-down { color: var(--down-color); }
.col-vol { width: 80px; text-align: right; font-size: 12px; color: var(--text-muted); }

/* Modal */
.modal {
    display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.7); backdrop-filter: blur(4px);
    align-items: center; justify-content: center;
}
.modal.show { display: flex; animation: fadeIn 0.2s; }
.modal-content {
    background-color: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: 16px; width: 92%; max-width: 500px; padding: 20px;
    position: relative; box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.close-btn { position: absolute; top: 12px; right: 20px; font-size: 26px; color: var(--text-muted); cursor: pointer; }
.close-btn:hover { color: var(--text-main); }
#modal-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; margin-right: 30px;}
.chart-container { position: relative; height: 250px; width: 100%; }

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