:root {
  --ink: #122035;
  --text: #536277;
  --muted: #718095;
  --line: #dfe7ee;
  --paper: #ffffff;
  --wash: #f4f8fb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --teal: #0f9f8f;
  --amber: #f59e0b;
  --rose: #e85d75;
  --green: #16a34a;
  --navy: #172554;
  --shadow: rgba(17, 24, 39, 0.08) 0 18px 40px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(37, 99, 235, 0.06) 1px, transparent 1px),
    linear-gradient(0deg, rgba(15, 159, 143, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, #fbfdff 0%, #eef5f9 100%);
  background-size: 38px 38px, 38px 38px, auto;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.topbar,
.report-hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid rgba(223, 231, 238, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.topbar h1,
.report-hero h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1.04;
  font-weight: 750;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
}

.muted {
  color: var(--text);
}

.large-text {
  max-width: 720px;
  font-size: 1.08rem;
  line-height: 1.75;
}

.hidden {
  display: none !important;
}

.workspace-grid,
.test-layout,
.report-grid,
.insight-grid {
  display: grid;
  gap: 16px;
}

.workspace-grid {
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1.18fr);
}

.test-layout {
  grid-template-columns: 280px minmax(0, 1fr);
}

.report-grid {
  grid-template-columns: minmax(0, 1fr) 340px;
}

.insight-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.full-width {
  grid-column: 1 / -1;
}

.panel {
  border: 1px solid rgba(223, 231, 238, 0.92);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 30px);
}

.student-panel {
  display: grid;
  align-content: start;
  gap: 16px;
}

.student-panel label {
  display: grid;
  gap: 8px;
  color: #334155;
  font-weight: 750;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 13px 14px;
}

textarea {
  min-height: 150px;
  margin-top: 18px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.22);
  outline-offset: 2px;
}

.btn {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  font-weight: 800;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: rgba(17, 24, 39, 0.12) 0 12px 26px;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.54;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

.status-panel {
  flex: 0 0 auto;
  min-width: 190px;
  border-left: 5px solid var(--teal);
  border-radius: 8px;
  background: #f7fbfb;
  padding: 14px 16px;
}

.status-panel span,
.status-panel strong {
  display: block;
}

.status-panel span {
  color: var(--muted);
}

.section-head h2,
.question-panel h2,
.course-panel h2 {
  margin: 0 0 12px;
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  line-height: 1.16;
  letter-spacing: 0;
}

.ability-map {
  position: relative;
  width: min(420px, 100%);
  aspect-ratio: 1;
  margin: 12px auto 22px;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.14), rgba(15, 159, 143, 0.16)),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.55) 0 1px, transparent 1px 18px);
}

.ability-map span {
  position: absolute;
  left: var(--x);
  top: var(--y);
  transform: translate(-50%, -50%);
  border: 1px solid rgba(18, 32, 53, 0.08);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 7px 9px;
  font-size: 0.88rem;
  font-weight: 800;
  white-space: nowrap;
}

.ability-map i {
  position: absolute;
  inset: 24%;
  clip-path: polygon(50% 0, 94% 33%, 78% 91%, 22% 91%, 6% 33%);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.78), rgba(232, 93, 117, 0.62), rgba(15, 159, 143, 0.68));
}

.plain-list {
  margin: 0;
  padding-left: 20px;
  color: var(--text);
}

.plain-list li {
  margin: 9px 0;
}

.progress-panel {
  position: sticky;
  top: 16px;
  height: fit-content;
}

.progress-circle {
  width: 170px;
  height: 170px;
  margin: 12px auto 24px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, #fff 0 58%, transparent 59%),
    conic-gradient(var(--primary) var(--progress, 0%), #e7eef6 0);
  display: grid;
  place-items: center;
  align-content: center;
  color: var(--ink);
}

.progress-circle strong,
.progress-circle span {
  display: block;
  position: relative;
}

.progress-circle strong {
  font-size: 2rem;
}

.progress-circle span {
  color: var(--text);
}

.dimension-stack {
  display: grid;
  gap: 10px;
}

.dimension-row {
  display: grid;
  grid-template-columns: 80px 1fr 36px;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 0.92rem;
}

.dimension-row div {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8eef5;
}

.dimension-row i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--teal));
}

.question-top {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(22, 163, 74, 0.26);
  border-radius: 6px;
  background: rgba(22, 163, 74, 0.1);
  color: #15803d;
  padding: 6px 10px;
  font-size: 0.86rem;
  font-weight: 800;
}

.chip-soft {
  border-color: rgba(37, 99, 235, 0.2);
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
}

.option-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.option-button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  padding: 15px 16px;
  text-align: left;
  font-weight: 700;
}

.option-button:hover,
.option-button.is-selected {
  border-color: rgba(37, 99, 235, 0.5);
  background: #f7faff;
}

.option-button.is-selected {
  box-shadow: rgba(37, 99, 235, 0.18) 0 12px 28px;
}

.question-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.hint {
  min-height: 24px;
  margin: 12px 0 0;
  color: var(--rose);
  font-weight: 800;
}

.score-ring {
  width: 168px;
  height: 168px;
  border-radius: 50%;
  background: conic-gradient(var(--primary), var(--teal), var(--amber), var(--rose), var(--primary));
  color: #fff;
  display: grid;
  place-items: center;
  align-content: center;
  flex: 0 0 auto;
}

.score-ring span,
.score-ring small {
  opacity: 0.82;
}

.score-ring strong {
  font-size: 3rem;
  line-height: 1;
}

.radar-chart {
  width: min(100%, 520px);
  height: auto;
  overflow: visible;
  display: block;
  margin: 0 auto;
}

.radar-chart polygon.grid {
  fill: none;
  stroke: rgba(37, 99, 235, 0.16);
}

.radar-chart line {
  stroke: rgba(18, 32, 53, 0.12);
}

.radar-chart path {
  fill: rgba(37, 99, 235, 0.3);
  stroke: var(--primary);
  stroke-width: 3;
}

.radar-chart circle {
  fill: #fff;
  stroke: var(--primary);
  stroke-width: 2;
}

.radar-chart text {
  fill: var(--ink);
  font-size: 12px;
  font-weight: 800;
}

.radar-chart .score-label {
  fill: var(--primary);
  font-size: 11px;
}

.course-panel {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.86);
}

.course-panel h2,
.course-panel .eyebrow {
  color: #fff;
}

.course-panel .btn {
  width: 100%;
  margin-top: 18px;
}

.detail-table {
  display: grid;
  gap: 8px;
}

.detail-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 74px;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
  color: var(--text);
}

.detail-row strong {
  color: var(--ink);
}

@media (max-width: 900px) {
  .topbar,
  .report-hero {
    align-items: flex-start;
    flex-direction: column;
  }

  .workspace-grid,
  .test-layout,
  .report-grid,
  .insight-grid {
    grid-template-columns: 1fr;
  }

  .progress-panel {
    position: static;
  }
}

@media (max-width: 620px) {
  .app-shell {
    width: min(100% - 20px, 1160px);
    padding-top: 10px;
  }

  .panel,
  .topbar,
  .report-hero {
    padding: 20px;
  }

  .question-actions .btn,
  .student-panel .btn {
    width: 100%;
  }

  .detail-row {
    grid-template-columns: 1fr;
  }

  .score-ring {
    width: 136px;
    height: 136px;
  }
}