:root {
  --primary: #5869d8;
  --primary-dark: #4052bd;
  --primary-soft: #eef0ff;
  --primary-pale: #f7f8ff;
  --accent: #19a7a0;
  --accent-soft: #eaf8f7;
  --bg: #f4f6fa;
  --card: #fff;
  --text: #202631;
  --muted: #8a93a3;
  --line: #e5e7eb;
  --success: #22c55e;
  --success-soft: #ecfdf3;
  --danger: #f56c6c;
  --danger-soft: #fff1f1;
  --warning: #e6a23c;
  --warning-soft: #fff7ed;
  --gray: #909399;
  --shadow: 0 8px 28px rgba(45, 55, 95, .06);
}
* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); }
body { margin: 0; color: var(--text); background: var(--bg); font: 14px/1.5 "Microsoft YaHei","PingFang SC",Arial,sans-serif; }
button,input,select,textarea { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }

.site-header { position: sticky; top: 0; z-index: 30; background: rgba(255,255,255,.97); box-shadow: 0 1px 0 var(--line); backdrop-filter: blur(10px); }
.embedded-module-heading { display: none; }
.header-inner { width: min(1480px, calc(100% - 56px)); margin: auto; }
.header-inner { display: flex; height: 76px; align-items: center; gap: 30px; }
.brand { display: flex; flex: none; align-items: center; gap: 11px; }
.brand-mark { display: grid; width: 44px; height: 44px; place-items: center; border-radius: 13px; color: #fff; background: linear-gradient(145deg,#6577e6,#4658c7); font-size: 21px; font-weight: 800; box-shadow: 0 8px 20px rgba(88,105,216,.25); }
.brand-copy { display: flex; flex-direction: column; }
.brand-copy strong { font-size: 20px; letter-spacing: 1px; }
.brand-copy span { color: var(--muted); font-size: 10px; letter-spacing: 2px; }
.main-nav { display: flex; flex: 1; align-self: stretch; }
.nav-item { position: relative; padding: 0 18px; border: 0; color: #171b24; background: transparent; font-size: 16px; white-space: nowrap; }
.nav-item:hover,.nav-item.active { color: var(--primary-dark); }
.nav-item.active::after { position: absolute; right: 18px; bottom: 0; left: 18px; height: 3px; background: var(--primary); content: ""; }
.teacher-meta { display: flex; flex: none; align-items: center; gap: 9px; }
.teacher-avatar { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; color: var(--primary-dark); background: var(--primary-soft); font-weight: 700; }
.teacher-meta strong,.teacher-meta span { display: block; }
.teacher-meta strong { font-size: 13px; }
.teacher-meta span,.teacher-meta small { color: var(--muted); font-size: 10px; }
.saved-dot { width: 7px; height: 7px; margin-left: 5px; border-radius: 50%; background: var(--success); }
.mobile-menu { display: none; border: 0; background: transparent; font-size: 22px; }

.content { width: min(1480px, calc(100% - 56px)); margin: auto; padding: 24px 0 50px; }
.page { display: none; }
.page.active { display: block; animation: pageIn .18s ease; }
@keyframes pageIn { from { opacity: .35; transform: translateY(3px); } }
.xlsx-warning { display: flex; width: min(1480px, calc(100% - 56px)); align-items: center; gap: 9px; margin: 14px auto 0; padding: 9px 14px; border: 1px solid #eadcbf; border-radius: 8px; color: #8a6631; background: #fffdf8; font-size: 12px; }
.xlsx-warning>span { display: grid; width: 18px; height: 18px; place-items: center; border-radius: 50%; color: #fff; background: var(--warning); font-size: 11px; font-weight: 800; }
.xlsx-warning p { flex: 1; margin: 0; }
.xlsx-warning button { border: 0; color: #a95d00; background: transparent; font-size: 20px; }

.page-head {
  min-height: 112px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 0 20px;
  padding: 24px 28px;
  border: 1px solid #dfe5f1;
  border-radius: 14px;
  background: linear-gradient(120deg, #fff, #f6f8ff);
  box-shadow: var(--shadow);
}
.page-title h1 { margin: 0 0 5px; font-size: 25px; font-weight: 650; line-height: 1.3; }
.page-title p,.card-subtitle { margin: 0; color: var(--muted); }
.page-title p { font-size: 14px; }
.page-actions,.inline-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.card { min-width: 0; padding: 24px 28px; border: 1px solid #e7e9f0; border-radius: 12px; background: var(--card); box-shadow: var(--shadow); }
.card + .card { margin-top: 18px; }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.card-title,.section-title { margin: 0; font-size: 18px; font-weight: 500; }
.section-title { position: relative; padding-left: 18px; }
.section-title::before { position: absolute; top: 4px; bottom: 4px; left: 0; width: 4px; border-radius: 4px; background: var(--accent); content: ""; }
.card-subtitle { margin-top: 4px; font-size: 12px; }

.hero-panel { display: grid; grid-template-columns: 1.5fr 1fr; padding: 0; overflow: hidden; }
.hero-copy { padding: 36px 40px; background: radial-gradient(circle at 86% 15%,rgba(25,167,160,.12),transparent 30%),linear-gradient(135deg,#fff 35%,#f2f3ff); }
.hero-eyebrow { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: 2px; }
.hero-copy h1 { margin: 8px 0 10px; font-size: 30px; font-weight: 600; }
.hero-copy p { margin: 0 0 24px; color: var(--muted); }
.hero-actions { display: flex; gap: 10px; }
.hero-stats { display: grid; grid-template-columns: repeat(3,1fr); align-items: center; padding: 25px; background: #fafaff; }
.hero-stat { text-align: center; }
.hero-stat + .hero-stat { border-left: 1px solid var(--line); }
.hero-stat b { display: block; font-size: 32px; font-weight: 500; }
.hero-stat span { color: var(--muted); }

.btn { min-height: 38px; padding: 8px 18px; border: 1px solid var(--primary); border-radius: 8px; color: #fff; background: var(--primary); transition: .15s; }
.btn:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-small { min-height: 32px; padding: 5px 13px; font-size: 12px; }
.btn-ghost { color: var(--primary-dark); background: #fff; }
.btn-ghost:hover { color: #fff; }
.btn-danger { border-color: var(--danger); background: var(--danger); }
.link-btn { padding: 3px; border: 0; color: var(--primary-dark); background: transparent; }
.student-name-link { padding: 2px 4px; border: 0; color: var(--primary-dark); background: transparent; font-weight: 700; }
.student-name-link:hover,.link-btn:hover { text-decoration: underline; }

.report-list { display: grid; gap: 16px; }
.report-row { display: grid; grid-template-columns: 1.6fr 2.4fr auto; align-items: center; gap: 28px; padding: 20px 26px; border: 1px solid #e4e7ef; border-radius: 9px; background: #fff; transition: .15s; }
.report-row:hover { border-color: #bec5ef; box-shadow: 0 6px 18px rgba(88,105,216,.08); }
.report-name { display: flex; align-items: center; gap: 12px; }
.report-name h3 { margin: 0; font-size: 17px; font-weight: 500; }
.report-meta { display: flex; gap: 32px; color: var(--muted); font-size: 12px; }
.report-meta span { white-space: nowrap; }
.preview-score-input { width: 92px; min-height: 34px; padding: 6px 9px; border: 1px solid #d9deea; border-radius: 7px; text-align: center; }
.preview-score-input:focus { border-color: var(--primary); outline: 3px solid rgba(88,105,216,.12); }
.delete-exam-row select { min-width: 360px; }
.badge,.status-pill { display: inline-flex; padding: 3px 10px; border-radius: 12px; font-size: 11px; font-weight: 600; }
.badge { color: var(--primary-dark); background: var(--primary-soft); }

.filter-panel { padding: 26px 34px; }
.filter-top { display: flex; gap: 16px; margin-bottom: 22px; }
.filter-top select,.filter-top input { min-width: 190px; }
.filter-search { display: flex; margin-left: auto; }
.filter-search input { width: 270px; border-radius: 2px 0 0 2px; }
.filter-search button { min-width: 52px; border-radius: 0; }
.filter-row { display: flex; min-height: 38px; align-items: flex-start; }
.filter-row>strong { width: 68px; padding-top: 5px; font-weight: 500; }
.filter-tags { display: flex; flex: 1; flex-wrap: wrap; gap: 5px 20px; }
.filter-tag { padding: 5px 10px; border: 0; color: #222; background: transparent; }
.filter-tag.active { border-radius: 16px; color: #fff; background: var(--primary); }

.overview-toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.overview-toolbar .inline-actions select { min-width: 170px; }
.overview-filter { display: flex; align-items: end; gap: 14px; }
.overview-filter .form-field { min-width: 210px; }
.overview-filter .filter-actions { display: flex; gap: 10px; margin-left: auto; }
.overview-metrics { display: grid; grid-template-columns: repeat(7,1fr); }
.overview-metric { position: relative; padding: 12px 14px; text-align: center; }
.overview-metric + .overview-metric::before { position: absolute; top: 10px; bottom: 10px; left: 0; width: 1px; background: var(--line); content: ""; }
.overview-metric b { display: block; margin-bottom: 7px; font-size: 29px; line-height: 1; }
.overview-metric span { color: var(--muted); font-size: 12px; }
.overview-metric.danger b { color: var(--danger); }
.overview-metric.success b { color: var(--success); }
.overview-metric.warning b { color: var(--warning); }
.report-metrics { grid-template-columns: repeat(4,1fr); }
.report-metrics .overview-metric:nth-child(5)::before { display: none; }
.report-compact { grid-template-columns: minmax(220px,1.4fr) repeat(4,minmax(90px,.7fr)) auto; }
.report-stat { text-align: center; }
.report-stat b,.report-stat span { display: block; }
.report-stat b { font-size: 17px; }
.report-stat span { color: var(--muted); font-size: 10px; }
.metric-strip { display: grid; grid-template-columns: repeat(5,1fr); padding: 28px 12px; }
.metric-item { position: relative; text-align: center; }
.metric-item + .metric-item::before { position: absolute; top: 8px; bottom: 8px; left: 0; width: 1px; background: var(--line); content: ""; }
.metric-value { margin-bottom: 8px; font-size: 40px; font-weight: 600; line-height: 1; }
.metric-label { color: #343b46; }
.metric-note { margin-top: 5px; color: var(--muted); font-size: 11px; }
.metric-item.success .metric-value { color: var(--success); }
.metric-item.danger .metric-value { color: var(--danger); }
.metric-item.warning .metric-value { color: var(--warning); }
.metric-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-bottom: 18px; }
.metric-card { padding: 20px; }
.metric-card .metric-value { font-size: 30px; }

.grid-2 { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; margin-top: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; margin-top: 18px; }
.span-2 { grid-column: span 2; }
.chart-container { min-height: 245px; }
.chart-container svg { display: block; width: 100%; height: auto; }
.chart-empty { display: grid; min-height: 230px; place-items: center; color: var(--muted); background: #fafafa; }
.chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; color: var(--muted); font-size: 11px; }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.legend-dot { width: 8px; height: 8px; border-radius: 2px; }

.privacy-warning { margin-bottom: 18px; padding: 13px 20px; border: 1px solid #ffb7b7; color: #f14b4b; background: #fff4f4; }
.report-titlebar { display: flex; align-items: center; gap: 14px; padding: 20px 28px; }
.report-titlebar h2 { flex: 1; margin: 0; font-size: 23px; }
.back-btn { border: 0; color: var(--primary); background: transparent; font-size: 28px; }
.report-workspace { margin-top: 20px; }
.report-tabs { display: flex; gap: 8px; margin-bottom: 14px; padding: 7px; border: 1px solid #e4e7ef; border-radius: 12px; background: #fff; box-shadow: var(--shadow); }
.report-tabs button { min-height: 40px; padding: 7px 20px; border: 0; border-radius: 8px; color: #697286; background: transparent; }
.report-tabs button:hover { color: var(--primary-dark); background: var(--primary-pale); }
.report-tabs button.active { color: #fff; background: var(--primary); font-weight: 700; box-shadow: 0 5px 14px rgba(88,105,216,.2); }
.report-main { min-width: 0; }
.report-summary { color: var(--muted); }
.report-summary a { color: var(--primary-dark); }

select,input[type=text],input[type=number],input[type=date],input[type=file],textarea { min-height: 38px; padding: 8px 12px; border: 1px solid #d8dee5; border-radius: 2px; outline: 0; background: #fff; }
select:focus,input:focus,textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(88,105,216,.10); }
.form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.form-grid.cols-3 { grid-template-columns: repeat(3,minmax(0,1fr)); }
.form-field { display: flex; min-width: 0; flex-direction: column; gap: 6px; }
.form-field>span { font-size: 12px; font-weight: 600; }
.form-field.full { grid-column: 1/-1; }
.inline-check { display: inline-flex; min-height: 38px; align-items: center; gap: 7px; padding: 0 12px; border: 1px solid var(--line); background: #fff; font-size: 13px; }
.inline-check input { accent-color: var(--primary); }
.form-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.radio-grid,.check-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.choice-card { display: flex; gap: 8px; padding: 14px; border: 1px solid var(--line); cursor: pointer; }
.choice-card:has(input:checked) { border-color: var(--primary); background: var(--primary-pale); }
.choice-card b,.choice-card small { display: block; }
.choice-card small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.upload-drop { display: flex; min-height: 120px; align-items: center; justify-content: center; gap: 16px; padding: 20px; border: 1px dashed #b9c0ec; border-radius: 10px; background: var(--primary-pale); }
.upload-symbol { color: var(--primary); font-size: 30px; }
.upload-copy b,.upload-copy span { display: block; }
.upload-copy span { color: var(--muted); font-size: 11px; }

.table-wrap { width: 100%; max-height: 620px; overflow: auto; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; background: #fff; white-space: nowrap; }
th,td { padding: 14px 16px; border-right: 1px solid #e1e7e9; border-bottom: 1px solid #e1e7e9; text-align: center; }
th { position: sticky; top: 0; z-index: 2; color: #222; background: #f2f6f7; font-weight: 600; }
tbody tr:nth-child(even) td { background: #f7fafb; }
tbody tr:hover td { background: #f0f2ff; }
.row-absent td { color: var(--gray); }
.status-success { color: #15803d; background: var(--success-soft); }
.status-warning { color: #a35e00; background: var(--warning-soft); }
.status-danger { color: #c73e3e; background: var(--danger-soft); }
.status-gray { color: #667085; background: #f0f1f3; }
.table-tools { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.table-tools input { width: 220px; }
.segmented { display: inline-flex; border: 1px solid var(--primary); }
.segmented button { min-height: 34px; padding: 5px 14px; border: 0; color: var(--primary-dark); background: #fff; }
.segmented button.active { color: #fff; background: var(--primary); }
.empty-state { padding: 38px; color: var(--muted); text-align: center; }

.list-accordion { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
.list-card { border: 1px solid var(--line); }
.list-card-head { display: flex; width: 100%; align-items: center; justify-content: space-between; padding: 15px; border: 0; background: #fafcfc; }
.list-card-title { display: flex; align-items: center; gap: 8px; }
.list-count { color: var(--primary-dark); }
.list-card-body { padding: 12px 15px 15px; }
.name-row { display: flex; justify-content: space-between; padding: 8px 4px; border-bottom: 1px dashed var(--line); }
.list-card-actions { display: flex; justify-content: space-between; margin-top: 10px; }
.summary-strip { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
.summary-item { padding: 14px; background: #f7f9f9; }
.summary-item span,.summary-item b { display: block; }
.summary-item span { color: var(--muted); font-size: 11px; }
.summary-item b { margin-top: 4px; font-size: 17px; }
.insight-list { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.insight-list li,.notice { padding: 12px 16px; border-left: 3px solid var(--accent); background: var(--accent-soft); }
.settings-section+.settings-section { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--line); }
.settings-title { margin: 0 0 14px; }
.class-row { display: grid; grid-template-columns: 1.2fr repeat(5,.65fr) auto; gap: 8px; align-items: end; padding: 12px 0; border-bottom: 1px solid var(--line); }
.danger-zone { border-color: #f4cccc; background: #fffafa; }

.toast-region { position: fixed; right: 22px; bottom: 22px; z-index: 100; display: grid; gap: 8px; width: min(360px,calc(100vw - 44px)); }
.toast { padding: 13px 16px; color: #fff; background: #263238; box-shadow: 0 10px 30px rgba(0,0,0,.18); }
.toast.success { background: var(--primary-dark); }
.toast.error { background: #c74747; }
.modal-backdrop { position: fixed; inset: 0; z-index: 110; display: grid; place-items: center; padding: 24px; background: rgba(20,30,35,.46); }
.modal { position: relative; width: min(430px,100%); padding: 28px; background: #fff; box-shadow: 0 25px 70px rgba(0,0,0,.22); text-align: center; }
.modal-wide { width: min(980px,100%); max-height: 90vh; overflow: auto; text-align: left; }
.modal-icon { display: grid; width: 44px; height: 44px; margin: auto; place-items: center; border-radius: 50%; color: var(--danger); background: var(--danger-soft); font-weight: 800; }
.modal-actions { display: flex; justify-content: center; gap: 10px; margin-top: 20px; }
.modal-close { position: absolute; top: 10px; right: 14px; z-index: 2; border: 0; color: var(--muted); background: transparent; font-size: 25px; }

.integration-panel { display: grid; grid-template-columns: 1.3fr .7fr; gap: 22px; align-items: center; border-color: #dfe3f5; background: linear-gradient(135deg,#fff,#f7f8ff); }
.integration-copy h3 { margin: 0 0 8px; font-size: 18px; }
.integration-copy p { margin: 0; color: var(--muted); line-height: 1.8; }
.integration-status { padding: 18px; border-radius: 10px; background: #fff; box-shadow: inset 0 0 0 1px #e5e8f2; }
.integration-status b,.integration-status span { display: block; }
.integration-status b { color: var(--accent); }
.integration-status span { margin-top: 5px; color: var(--muted); font-size: 12px; }
.profile-header { display: flex; align-items: center; gap: 18px; }
.profile-avatar { display: grid; width: 64px; height: 64px; place-items: center; border-radius: 18px; color: #fff; background: linear-gradient(145deg,var(--primary),var(--accent)); font-size: 24px; font-weight: 700; }
.profile-header h2 { margin: 0 0 5px; }
.profile-header p { margin: 0; color: var(--muted); }
.export-action { width: 100%; color: var(--text); background: #fff; text-align: left; }
.export-action:hover { border-color: var(--primary); background: var(--primary-pale); }

body.embedded .brand,body.embedded .teacher-meta,body.embedded .mobile-menu,body.embedded .embedded-module-heading { display: none; }
html.embedded,body.embedded { background: transparent; }
body.embedded .site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 0 0 12px;
  background: #f4f6fa;
  box-shadow: 0 1px 0 var(--line);
  backdrop-filter: none;
}
body.embedded .embedded-module-heading {
  display: none;
  min-height: 112px;
  margin: 0 8px 20px;
  padding: 24px 28px;
  border: 1px solid #dfe5f1;
  border-radius: 14px;
  background: linear-gradient(120deg,#fff,#f6f8ff);
  box-shadow: 0 8px 28px rgba(39,53,86,.065);
}
body.embedded .embedded-module-heading h1 { margin: 0 0 5px; font-size: 25px; font-weight: 650; line-height: 1.3; }
body.embedded .embedded-module-heading p { margin: 0; color: #748097; font-size: 14px; }
body.embedded .header-inner { width: 100%; height: auto; padding: 0 12px; }
body.embedded .main-nav {
  position: relative;
  display: flex;
  flex: none;
  flex-direction: row;
  align-self: auto;
  gap: 8px;
  width: fit-content;
  margin: 0;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(45,55,95,.06);
}
body.embedded .nav-item {
  min-height: 43px;
  padding: 0 22px;
  border-radius: 11px;
  color: #748097;
  font-size: 16px;
  font-weight: 800;
}
body.embedded .nav-item:hover { color: #34486c; background: #f2f4f8; }
body.embedded .nav-item.active {
  color: #fff;
  background: #34486c;
  box-shadow: 0 6px 15px rgba(52,72,108,.2);
}
body.embedded .nav-item.active::after { display: none; }
body.embedded .content { width: 100%; padding: 16px 0 50px; }
body.embedded .xlsx-warning { width: 100%; margin-top: 0; }

@media (max-width: 1180px) {
  .nav-item { padding: 0 10px; font-size: 14px; }
  .teacher-meta small,.teacher-meta .saved-dot { display: none; }
  .metric-strip { grid-template-columns: repeat(3,1fr); }
  .metric-item:nth-child(4)::before { display: none; }
  .class-row { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 900px) {
  .header-inner,.content,.xlsx-warning { width: calc(100% - 28px); }
  .mobile-menu { display: block; }
  .main-nav { position: fixed; top: 76px; right: 0; left: 0; display: none; height: auto; flex-direction: column; padding: 10px; background: #fff; box-shadow: var(--shadow); }
  .main-nav.open { display: flex; }
  .nav-item { min-height: 44px; text-align: left; }
  .nav-item.active::after { top: 8px; right: auto; bottom: 8px; left: 0; width: 3px; height: auto; }
  .teacher-meta { margin-left: auto; }
  .hero-panel { grid-template-columns: 1fr; }
  .report-tabs { overflow-x: auto; }
  .report-tabs button { flex: none; }
  .grid-2,.grid-3,.list-accordion { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .report-row { grid-template-columns: 1fr; gap: 12px; }
  .report-compact { grid-template-columns: 1fr 1fr; }
  .overview-filter { align-items: stretch; flex-direction: column; }
  .overview-filter .filter-actions { margin-left: 0; }
  .overview-metrics { grid-template-columns: repeat(4,1fr); }
}
@media (max-width: 620px) {
  .brand-copy,.teacher-meta>div:not(.teacher-avatar) { display: none; }
  .header-inner { gap: 12px; }
  .content { padding-top: 14px; }
  .page-head {
    min-height: 112px;
    align-items: flex-start;
    flex-direction: column;
    padding: 22px 20px;
  }
  .page-actions { width: 100%; }
  body.embedded .embedded-module-heading { min-height: 112px; padding: 22px 20px; }
  .card { padding: 18px 16px; }
  .hero-stats { grid-template-columns: 1fr; gap: 16px; }
  .hero-stat+.hero-stat { border-top: 1px solid var(--line); border-left: 0; padding-top: 16px; }
  .metric-strip,.metric-grid,.form-grid,.form-grid.cols-3,.radio-grid,.check-grid,.summary-strip { grid-template-columns: 1fr; }
  .metric-item+.metric-item::before { top: 0; right: 20%; bottom: auto; left: 20%; width: auto; height: 1px; }
  .filter-top { flex-direction: column; }
  .filter-search { margin-left: 0; }
  .filter-search input { width: 100%; }
  .report-meta { flex-direction: column; gap: 4px; }
  .overview-metrics { grid-template-columns: repeat(2,1fr); }
  .overview-metric:nth-child(odd)::before { display: none; }
}

/* Score analytics cockpit visual refresh */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-soft: #eaf2ff;
  --primary-pale: #f5f9ff;
  --accent: #14b8a6;
  --accent-soft: #e7fbf8;
  --bg: #f6f8fc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --line: #e5eaf2;
  --success: #22c55e;
  --success-soft: #ecfdf3;
  --danger: #ef4444;
  --danger-soft: #fff1f1;
  --warning: #f59e0b;
  --warning-soft: #fff7df;
  --shadow: 0 14px 38px rgba(24, 40, 72, .08);
}

html,
body {
  background:
    radial-gradient(circle at 8% 0%, rgba(59,130,246,.12), transparent 24rem),
    radial-gradient(circle at 96% 8%, rgba(20,184,166,.12), transparent 24rem),
    var(--bg);
}

.site-header {
  background: rgba(255,255,255,.88);
  box-shadow: 0 1px 0 rgba(226,232,240,.9), 0 10px 30px rgba(24,40,72,.05);
}

.header-inner,
.page-head,
.card,
.hero-panel,
.report-titlebar,
.filter-panel,
.metric-card,
.integration-panel,
.modal,
.upload-drop,
.choice-card,
.summary-item {
  border-radius: 22px;
}

.card,
.page-head,
.hero-panel,
.report-titlebar,
.filter-panel {
  border-color: rgba(226,232,240,.95);
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow);
}

.page-head {
  background:
    linear-gradient(135deg, rgba(255,255,255,.96), rgba(240,253,250,.82)),
    radial-gradient(circle at 100% 0%, rgba(20,184,166,.16), transparent 18rem);
}

.page-title h1,
.section-title,
.card-title {
  color: var(--text);
  font-weight: 900;
}

.nav-item {
  border-radius: 14px;
  font-weight: 800;
}

.nav-item:hover {
  background: var(--primary-soft);
}

.nav-item.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.nav-item.active::after {
  display: none;
}

.hero-copy {
  background:
    radial-gradient(circle at 90% 10%, rgba(20,184,166,.16), transparent 18rem),
    linear-gradient(135deg, #fff, #eff6ff);
}

.hero-stat b,
.overview-metric b,
.metric-value,
.summary-item b {
  color: #0f766e;
}

.overview-metrics,
.metric-strip,
.summary-strip {
  gap: 12px;
}

.overview-metric,
.metric-item,
.summary-item,
.score-student-metrics article {
  border-radius: 18px;
  background: linear-gradient(135deg, #f0fdfa, #ffffff);
  box-shadow: inset 0 0 0 1px rgba(226,232,240,.75);
}

.overview-metric + .overview-metric::before,
.metric-item + .metric-item::before {
  display: none;
}

.btn {
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 10px 24px rgba(20,184,166,.18);
}

.btn-ghost {
  color: var(--primary-dark);
  background: #fff;
}

.filter-tag.active,
.segmented button.active,
.report-tabs button.active {
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.report-row,
.list-card,
.table-wrap,
.score-student-detail-card,
.class-row {
  border-radius: 18px;
}

.report-row:hover,
.card:hover,
.choice-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 42px rgba(24,40,72,.12);
}

.badge,
.status-pill,
.inline-check {
  border-radius: 999px;
}

select,
input[type=text],
input[type=number],
input[type=date],
input[type=file],
textarea,
.preview-score-input {
  border-radius: 12px;
}

.upload-drop {
  border-color: rgba(59,130,246,.28);
  background: linear-gradient(135deg, #eff6ff, #f0fdfa);
}

.empty-state,
.chart-empty {
  border: 1px dashed rgba(148,163,184,.55);
  border-radius: 22px;
  background: linear-gradient(135deg, #fff, #f8fbff);
}