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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: #f5f7fa;
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: #5a6c7d;
    margin-bottom: 30px;
}

h1 {
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1em;
    font-weight: 300;
    color: #7a8a9a;
}

.home-link {
    display: inline-block;
    margin-top: 12px;
    color: #7a9fc4;
    text-decoration: none;
    font-size: 0.95em;
}

.home-link:hover {
    text-decoration: underline;
}

/* 탭 */
.tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 12px 36px;
    border: 2px solid #b8c5d6;
    background: white;
    color: #5a6c7d;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.05em;
    font-weight: 600;
    font-family: 'Noto Sans KR', sans-serif;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    background: #e8f0f7;
}

.tab-btn.active {
    background: #d4e4f7;
    border-color: #7a9fc4;
    color: #37536e;
}

/* 필터 */
.control-panel {
    background: white;
    border-radius: 12px;
    padding: 22px 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.filter-section+.filter-section {
    margin-top: 16px;
}

.filter-section h3 {
    color: #5a6c7d;
    margin-bottom: 10px;
    font-size: 1em;
}

.inline-controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

select,
input[type="search"] {
    padding: 9px 14px;
    border: 2px solid #d0dce8;
    border-radius: 8px;
    font-size: 0.95em;
    font-family: 'Noto Sans KR', sans-serif;
    background: white;
    color: #37536e;
}

input[type="search"] {
    min-width: 220px;
}

#regionInput {
    width: 330px;
    max-width: 100%;
}

.check-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #37536e;
    font-size: 0.95em;
    cursor: pointer;
    user-select: none;
}

.check-label[hidden] {
    display: none;
}

.hint {
    color: #8fa3b8;
    font-size: 0.88em;
}

/* 표 */
.table-wrapper {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    margin-bottom: 20px;
}

.table-header {
    padding: 16px 20px;
    border-bottom: 1px solid #e8eef4;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.table-header h3 {
    color: #5a6c7d;
    font-size: 1.05em;
}

.table-container {
    max-height: 520px;
    overflow: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

thead {
    background: white;
    border-bottom: 1px solid #ccc;
}

th {
    padding: 13px 10px;
    text-align: right;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 10;
    background: white;
    font-size: 0.92em;
    border-right: 1px solid #e0e0e0;
    cursor: pointer;
    white-space: nowrap;
}

th:first-child,
td:first-child {
    text-align: left;
    min-width: 150px;
}

th.sorted::after {
    content: ' ▾';
    color: #7a9fc4;
}

th.sorted.asc::after {
    content: ' ▴';
}

td {
    padding: 11px 10px;
    text-align: right;
    font-size: 0.92em;
    border-bottom: 1px solid #f0f4f8;
    border-right: 1px solid #f4f7fa;
    white-space: nowrap;
}

tbody tr {
    cursor: pointer;
}

tbody tr:hover {
    background: #f0f6fc;
}

tbody tr.selected {
    background: #d4e4f7;
}

.pos {
    color: #1e7d5a;
    font-weight: 600;
}

.neg {
    color: #b8474d;
    font-weight: 600;
}

.muted {
    color: #a9b6c4;
}

/* 상세 */
.detail-panel {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.detail-title {
    color: #37536e;
    font-size: 1.4em;
    font-weight: 700;
    margin-bottom: 4px;
}

.detail-sub {
    color: #8fa3b8;
    font-size: 0.92em;
    margin-bottom: 18px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
    margin-bottom: 22px;
}

.stat {
    background: #f5f8fc;
    border: 1px solid #e3ebf3;
    border-radius: 10px;
    padding: 14px;
    text-align: center;
}

.stat-label {
    color: #8fa3b8;
    font-size: 0.82em;
    margin-bottom: 6px;
}

.stat-value {
    color: #37536e;
    font-size: 1.45em;
    font-weight: 700;
}

.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
    gap: 22px;
}

.chart-box {
    border: 1px solid #eef2f7;
    border-radius: 10px;
    padding: 16px;
}

.chart-box h4 {
    color: #5a6c7d;
    font-size: 0.98em;
    margin-bottom: 12px;
}

.chart-canvas {
    position: relative;
    height: 280px;
}

.empty {
    text-align: center;
    color: #a9b6c4;
    padding: 40px 20px;
}

footer {
    text-align: center;
    color: #8fa3b8;
    font-size: 0.85em;
    line-height: 1.7;
    padding: 20px 0 40px;
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.8em;
    }

    .chart-grid {
        grid-template-columns: 1fr;
    }

    .chart-canvas {
        height: 240px;
    }

    input[type="search"] {
        min-width: 160px;
    }
}

/* 목록 / 지도 전환 */
[hidden] { display: none !important; }
.view-switch { display: flex; justify-content: center; gap: 8px; margin-bottom: 18px; }
.view-btn, .map-fit-btn, .popup-detail-btn {
    font: inherit; cursor: pointer; border: 1px solid #b8c5d6; border-radius: 8px;
    background: #fff; color: #37536e; padding: 9px 18px;
}
.view-btn.active { color: #fff; background: #37536e; border-color: #37536e; }
.view-btn:focus-visible, .map-fit-btn:focus-visible, .check-label input:focus-visible {
    outline: 3px solid #78a9dd; outline-offset: 3px;
}
.map-panel { background: white; border-radius: 12px; box-shadow: 0 2px 8px rgba(0,0,0,.08); margin-bottom: 20px; overflow: hidden; }
.map-toolbar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; padding: 18px 20px 8px; }
.map-layers { display: flex; gap: 24px; flex-wrap: wrap; border: 0; }
.map-layers legend { font-weight: 600; font-size: .9em; color: #5a6c7d; margin-bottom: 10px; }
.map-layers input { width: 17px; height: 17px; accent-color: #37536e; }
.school-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.elem-dot { background: #1976ad; }
.mid-dot { background: #8352ba; }
.map-status { padding: 10px 20px 16px; font-size: .9em; color: #5a6c7d; }
#schoolMap { height: min(68vh, 720px); min-height: 420px; background: #e8edf1; z-index: 0; }
.map-help { padding: 14px 20px; font-size: .82em; color: #64778a; line-height: 1.8; }
.map-help a { color: #37536e; }
.map-tile-notice { background: #fff5d9; color: #745720; padding: 8px 20px; font-size: .88em; }
.school-marker, .school-cluster { color: #fff; border: 2px solid #fff; border-radius: 50%; box-shadow: 0 2px 7px #0004; text-align: center; font-family: 'Noto Sans KR', sans-serif; }
.school-marker { font-size: 12px; line-height: 24px; font-weight: 700; }
.school-marker-elem, .school-cluster-elem { background: #1976ad; }
.school-marker-mid, .school-cluster-mid { background: #8352ba; }
.school-cluster { display: flex; flex-direction: column; justify-content: center; line-height: 1.15; }
.school-cluster span { font-size: 10px; opacity: .9; }
.school-cluster strong { font-size: 14px; }
.school-map-popup { font-family: 'Noto Sans KR', sans-serif; min-width: 220px; color: #37536e; }
.school-map-popup h3 { font-size: 16px; margin: 8px 0; }
.school-map-popup p { margin: 8px 0; }
.school-map-popup .popup-address { color: #64778a; font-size: 12px; }
.popup-kind { font-size: 11px; font-weight: 600; }
.popup-kind.elem { color: #1976ad; }
.popup-kind.mid { color: #8352ba; }
.popup-detail-btn { width: 100%; font-size: 12px; margin-top: 8px; }
@media (max-width: 768px) {
    .map-toolbar { padding: 14px; }
    .map-fit-btn { font-size: .85em; }
    #schoolMap { height: 60vh; min-height: 360px; }
    .map-status, .map-help { padding-left: 14px; padding-right: 14px; }
}