/* ============================================================ */
/* grade_distribution.css — 성적 분포 · 등급 통계 페이지 전용     */
/* 공통 자산 (tokens/base/...)과 조합해 사용                      */
/* ============================================================ */

.main { padding: 0; }
.page-content { padding: 20px 24px 40px; display: flex; flex-direction: column; gap: 14px; }

.topbar-actions { display: flex; gap: 8px; align-items: center; }

/* ── 요약 카운터 (final_apply_list / uo 와 통일) ── */
.summary-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.summary-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-md); padding: 14px 16px; display: flex; flex-direction: column; gap: 4px; }
.summary-card .lbl { font-size: 10.5px; color: var(--text-3); letter-spacing: 0.08em; text-transform: uppercase; font-family: 'Geist Mono', monospace; }
.summary-card .val { font-size: 24px; font-weight: 700; letter-spacing: -0.03em; font-family: 'Geist Mono', monospace; }
.summary-card .sub { font-size: 11.5px; color: var(--text-2); }
.summary-card.accent .val { color: var(--accent); }

.mini-select {
  appearance: none; border: 1px solid var(--border); background: var(--surface);
  padding: 6px 28px 6px 12px; border-radius: var(--r-sm);
  font-size: 12.5px; font-family: inherit; color: var(--text); cursor: pointer; min-width: 130px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat; background-position: right 8px center;
}

/* ── 카테고리 탭 ── */
.cat-tabs { display: flex; gap: 4px; padding: 4px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-md); flex-wrap: wrap; }
.cat-tab { display: inline-flex; align-items: center; gap: 6px; border: 0; background: transparent; color: var(--text-2); padding: 8px 14px; font-size: 13px; font-weight: 500; border-radius: var(--r-sm); cursor: pointer; transition: all 200ms var(--ease-out); font-family: inherit; flex: 1; justify-content: center; min-width: 110px; }
.cat-tab i { font-size: 16px; }
.cat-tab:hover:not(.active) { color: var(--text); background: var(--surface-2); }
.cat-tab.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; box-shadow: inset 0 0 0 1px var(--accent); }

/* ── 과목 chip ── */
.subj-chips { display: flex; flex-wrap: wrap; gap: 6px; min-height: 32px; }
.subj-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-size: 12.5px; color: var(--text-2); cursor: pointer; user-select: none; transition: all 180ms var(--ease); font-family: inherit; }
.subj-chip:hover { border-color: var(--text-3); color: var(--text); }
.subj-chip.on { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; }
.subj-chip .count { font-family: 'Geist Mono', monospace; font-size: 10.5px; opacity: 0.75; }
.subj-chip-empty { padding: 8px 12px; font-size: 12px; color: var(--text-3); font-style: italic; }

/* ── 차트 + 분포표 ── */
.chart-grid { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 14px; align-items: start; }
@media (max-width: 1100px) { .chart-grid { grid-template-columns: 1fr; } }

.chart-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-md); padding: 16px 18px; display: flex; flex-direction: column; gap: 14px; }
.chart-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.chart-title { font-size: 15px; font-weight: 700; letter-spacing: -0.02em; }
.chart-legend { display: flex; gap: 12px; font-size: 11px; color: var(--text-2); font-family: 'Geist Mono', monospace; }
.chart-legend .lg { display: inline-flex; align-items: center; gap: 5px; }
.chart-legend .lg i { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }
.chart-legend .lg-good i { background: var(--accent); }
.chart-legend .lg-mid i  { background: var(--warn); }
.chart-legend .lg-low i  { background: var(--danger); }

.chart-canvas-wrap { position: relative; height: 380px; }
.chart-canvas-wrap canvas { max-height: 380px; }
.chart-empty { display: none; position: absolute; inset: 0; flex-direction: column; align-items: center; justify-content: center; gap: 8px; color: var(--text-3); }
.chart-empty.show { display: flex; }
.chart-empty i { font-size: 40px; }

/* ── 분포표 (right side) ── */
.dist-table-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-md); padding: 14px 16px; }
.dist-head { font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); font-family: 'Geist Mono', monospace; margin-bottom: 8px; font-weight: 600; }
.dist-table { width: 100%; border-collapse: collapse; font-size: 12.5px; font-family: 'Geist Mono', monospace; }
.dist-table th, .dist-table td { padding: 7px 8px; border-bottom: 1px solid var(--border-soft); text-align: right; }
.dist-table th { font-size: 10.5px; color: var(--text-3); font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; }
.dist-table th:first-child, .dist-table td:first-child { text-align: left; font-family: inherit; font-weight: 600; }
.dist-table tr.grade-1 td:first-child, .dist-table tr.grade-2 td:first-child, .dist-table tr.grade-3 td:first-child { color: var(--accent); }
.dist-table tr.grade-4 td:first-child, .dist-table tr.grade-5 td:first-child { color: var(--warn); }
.dist-table tr.grade-6 td:first-child, .dist-table tr.grade-7 td:first-child, .dist-table tr.grade-8 td:first-child, .dist-table tr.grade-9 td:first-child { color: var(--danger); }
.dist-table tr.zero td { color: var(--text-3); }
.dist-table .bar { position: relative; height: 4px; background: var(--surface-2); border-radius: 2px; margin-top: 3px; overflow: hidden; }
.dist-table .bar > i { display: block; height: 100%; background: var(--accent); border-radius: 2px; }
.dist-table tr.grade-4 .bar > i, .dist-table tr.grade-5 .bar > i { background: var(--warn); }
.dist-table tr.grade-6 .bar > i, .dist-table tr.grade-7 .bar > i, .dist-table tr.grade-8 .bar > i, .dist-table tr.grade-9 .bar > i { background: var(--danger); }
.dist-table tfoot td { padding-top: 10px; border-top: 1px solid var(--border); border-bottom: 0; font-weight: 700; color: var(--text); }

/* loading spin */
.spin { animation: spin 1s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }