:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --ink: #121a2a;
  --muted: #607083;
  --line: #dbe4ef;
  --blue: #2563eb;
  --blue-dark: #1742a4;
  --green: #059669;
  --deep-green: #047857;
  --teal: #0f766e;
  --amber: #d97706;
  --orange-red: #dc4a1d;
  --red: #dc2626;
  --shadow: 0 18px 55px rgba(18, 26, 42, 0.09);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 30%), linear-gradient(180deg, #fbfdff 0%, var(--bg) 42%, #eef3f9 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: inherit; text-decoration: none; }

main {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px max(16px, calc((100vw - 1220px) / 2));
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(219, 228, 239, 0.9);
  backdrop-filter: blur(16px);
}

.brand,
.topbar nav,
.button,
.scenario-top,
.eyebrow {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 850;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
}

.topbar nav {
  gap: 18px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 750;
}

.home-hero,
.builder-header,
.result-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 28px;
  align-items: stretch;
  padding: 36px 0 30px;
}

.eyebrow {
  gap: 8px;
  margin: 0 0 10px;
  color: var(--blue-dark);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

.home-hero h1,
.builder-header h1,
.result-hero h1 {
  max-width: 900px;
  margin-bottom: 10px;
  font-size: clamp(2.4rem, 6vw, 5.6rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.subtitle {
  margin-bottom: 10px;
  color: #27364e;
  font-size: clamp(1.2rem, 2vw, 1.65rem);
  font-weight: 750;
}

.hero-copy,
.section-head p,
.builder-header p,
.result-hero p,
.panel-title p,
.card-title p,
.scenario-card p,
.learning-panel p {
  color: var(--muted);
  line-height: 1.6;
}

.hero-panel,
.scenario-card,
.builder-card,
.scenario-brief,
.score-card,
.kpi,
.panel,
.learning-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.mini-stat {
  padding: 18px;
  border-radius: 10px;
  background: var(--panel-soft);
}

.mini-stat span {
  display: block;
  color: var(--blue);
  font-size: 2rem;
  font-weight: 900;
}

.mini-stat p { margin: 6px 0 0; color: var(--muted); }

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: end;
  margin: 26px 0 18px;
}

.section-head h2 { margin: 0; font-size: 2rem; }
.section-head p { max-width: 460px; margin-bottom: 0; }

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.scenario-card {
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
}

.scenario-top {
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 750;
}

.difficulty {
  padding: 6px 9px;
  border-radius: 999px;
  background: #e8eefb;
  color: var(--blue-dark);
}

.difficulty.hard { background: #fff2e1; color: #a65300; }
.difficulty.easy { background: #e7f7f0; color: #047857; }

.scenario-card h3 {
  margin: 18px 0 10px;
  font-size: 1.2rem;
}

.scenario-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.scenario-training {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
  padding: 14px;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  background: #eff6ff;
}

.scenario-training div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.scenario-training span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 850;
  text-transform: uppercase;
}

.scenario-training strong {
  color: #173b7a;
}

.scenario-training p {
  margin: 0;
  color: #3f5876;
  font-size: 0.86rem;
  line-height: 1.45;
}

dt {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 750;
  text-transform: uppercase;
}

dd {
  margin: 4px 0 0;
  font-weight: 850;
}

.button {
  justify-content: center;
  min-height: 44px;
  padding: 0 17px;
  border: 1px solid var(--blue);
  border-radius: 9px;
  font-weight: 850;
  cursor: pointer;
}

.button.primary { background: var(--blue); color: #fff; }
.button.secondary { background: #fff; color: var(--blue); }
.button.large { min-height: 52px; padding: 0 24px; }
.button:hover { filter: brightness(0.96); }

.scenario-brief,
.score-card {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.scenario-brief div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.scenario-brief div:last-child { border-bottom: 0; padding-bottom: 0; }
.scenario-brief span { color: var(--muted); }

.builder-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.builder-card,
.panel,
.learning-panel {
  padding: 22px;
}

.builder-card.wide,
.panel.wide,
.table-panel,
.learning-panel {
  grid-column: 1 / -1;
}

.card-title,
.panel-title {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.card-title > span {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: #e8eefb;
  color: var(--blue-dark);
  font-weight: 900;
}

.card-title h2,
.panel-title h2 {
  margin-bottom: 3px;
  font-size: 1.1rem;
}

.card-title p,
.panel-title p { margin-bottom: 0; font-size: 0.92rem; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.form-grid.compact { grid-template-columns: repeat(2, 1fr); }

label {
  display: grid;
  gap: 8px;
  color: #27364e;
  font-size: 0.88rem;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 0 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

small {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 650;
  line-height: 1.45;
}

[hidden] { display: none !important; }

input[readonly] { background: #f2f5f9; color: var(--muted); }

.action-bar,
.result-actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 4px;
}

.error-box {
  margin-bottom: 18px;
  padding: 14px 16px;
  border: 1px solid #fecaca;
  border-radius: 10px;
  background: #fff1f2;
  color: #991b1b;
  font-weight: 750;
}

.error-box p { margin: 4px 0; }

.score-card {
  align-content: center;
  text-align: center;
}

.score-card span {
  color: var(--muted);
  font-weight: 850;
  text-transform: uppercase;
}

.score-card strong {
  color: var(--blue);
  font-size: 4.4rem;
  line-height: 1;
}

.grade-badge {
  justify-self: center;
  padding: 7px 10px;
  border-radius: 999px;
  color: #fff !important;
}

.score-card.score-band-deep-green {
  border-color: rgba(4, 120, 87, 0.45);
  box-shadow: 0 18px 55px rgba(4, 120, 87, 0.14);
}

.score-card.score-band-teal {
  border-color: rgba(15, 118, 110, 0.45);
  box-shadow: 0 18px 55px rgba(15, 118, 110, 0.14);
}

.score-card.score-band-amber {
  border-color: rgba(217, 119, 6, 0.45);
  box-shadow: 0 18px 55px rgba(217, 119, 6, 0.14);
}

.score-card.score-band-orange-red {
  border-color: rgba(220, 74, 29, 0.45);
  box-shadow: 0 18px 55px rgba(220, 74, 29, 0.14);
}

.score-card.score-band-red {
  border-color: rgba(220, 38, 38, 0.45);
  box-shadow: 0 18px 55px rgba(220, 38, 38, 0.14);
}

.score-band-deep-green strong { color: var(--deep-green); }
.score-band-teal strong { color: var(--teal); }
.score-band-amber strong { color: var(--amber); }
.score-band-orange-red strong { color: var(--orange-red); }
.score-band-red strong { color: var(--red); }

.grade-badge.score-band-deep-green,
.summary-banner.score-band-deep-green {
  background: #ecfdf5;
  color: #065f46 !important;
  border-color: #a7f3d0;
}

.grade-badge.score-band-teal,
.summary-banner.score-band-teal {
  background: #ecfeff;
  color: #0f766e !important;
  border-color: #99f6e4;
}

.grade-badge.score-band-amber,
.summary-banner.score-band-amber {
  background: #fffbeb;
  color: #92400e !important;
  border-color: #fde68a;
}

.grade-badge.score-band-orange-red,
.summary-banner.score-band-orange-red {
  background: #fff7ed;
  color: #9a3412 !important;
  border-color: #fed7aa;
}

.grade-badge.score-band-red,
.summary-banner.score-band-red {
  background: #fef2f2;
  color: #991b1b !important;
  border-color: #fecaca;
}

.summary-banner {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-bottom: 20px;
  padding: 16px 18px;
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  background: #eff6ff;
  color: #173b7a;
}

.summary-banner strong { white-space: nowrap; }

.target-strip,
.target-grid {
  display: grid;
  gap: 12px;
}

.target-strip {
  grid-template-columns: minmax(260px, 1.35fr) repeat(auto-fit, minmax(140px, 1fr));
  margin-bottom: 18px;
  padding: 14px;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  background: #eff6ff;
}

.target-strip div,
.target-card {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
}

.target-strip span,
.target-card span {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 850;
  text-transform: uppercase;
}

.target-strip strong,
.target-card strong {
  display: block;
  margin-top: 6px;
  color: var(--ink);
  font-size: 1.15rem;
}

.target-strip p,
.target-card p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.45;
}

.target-panel {
  margin-bottom: 18px;
}

.target-panel.target-beat {
  border-color: #a7f3d0;
}

.target-panel.target-missed {
  border-color: #fed7aa;
}

.target-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.target-card.passed {
  border-color: #a7f3d0;
  background: #ecfdf5;
}

.target-card.passed strong {
  color: var(--deep-green);
}

.target-card.failed {
  border-color: #fed7aa;
  background: #fff7ed;
}

.target-card.failed strong {
  color: #9a3412;
}

.target-explanation {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.55;
}

.city-picker,
.helper-card,
.definition-grid {
  margin-top: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-soft);
}

.city-picker > span,
.helper-card h3,
.definition-grid strong {
  display: block;
  margin-bottom: 8px;
  color: #27364e;
  font-size: 0.92rem;
  font-weight: 850;
}

.multi-check-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 12px;
}

.check-label {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 750;
}

.check-label input {
  width: auto;
  min-height: auto;
}

.helper-card {
  display: grid;
  gap: 9px;
}

.helper-card p,
.helper-card span,
.definition-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.helper-card div {
  display: grid;
  gap: 3px;
}

.definition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.benchmark-note-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.benchmark-card-grid,
.mini-benchmark-grid,
.benchmark-mini-list {
  display: grid;
  gap: 12px;
}

.benchmark-card-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-bottom: 18px;
}

.mini-benchmark-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 10px;
}

.benchmark-mini-list {
  grid-template-columns: 1fr;
}

.benchmark-note-grid div,
.benchmark-card,
.mini-benchmark-grid div,
.benchmark-mini-list div,
.attempt-summary {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-soft);
}

.benchmark-note-grid span,
.benchmark-card span,
.mini-benchmark-grid span,
.benchmark-mini-list span,
.attempt-summary span,
.attempt-row span {
  display: block;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 850;
  text-transform: uppercase;
}

.benchmark-note-grid p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.benchmark-card strong,
.mini-benchmark-grid strong,
.benchmark-mini-list strong {
  display: block;
  margin-top: 6px;
  color: var(--ink);
}

.benchmark-card p,
.benchmark-mini-list p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 18px;
}

.kpi { padding: 18px; }

.kpi span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.kpi strong {
  display: block;
  margin-top: 8px;
  font-size: 1.55rem;
}

.kpi.accent {
  border-color: #bfdbfe;
  background: #eff6ff;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 18px;
}

.chart-board {
  width: 100%;
  min-height: 260px;
}

.warning,
.positive {
  margin: 10px 0;
  padding: 12px;
  border-radius: 9px;
  line-height: 1.5;
}

.warning {
  background: #fff7ed;
  color: #9a3412;
  border: 1px solid #fed7aa;
}

.positive {
  background: #ecfdf5;
  color: #047857;
  border: 1px solid #a7f3d0;
}

.insight-list,
.action-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.65;
}

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  min-width: 1060px;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
}

.learning-panel { margin-top: 18px; }
.learning-panel h2 { margin-bottom: 8px; }

.attempt-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0;
}

.attempt-summary strong,
.attempt-row strong {
  display: block;
  margin-top: 6px;
}

.attempt-list {
  display: grid;
  gap: 10px;
}

.attempt-row {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(100px, 0.45fr)) minmax(90px, 0.35fr);
  gap: 12px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-soft);
}

.button.small {
  min-height: auto;
  padding: 8px 10px;
  font-size: 0.78rem;
}

.replay-banner {
  border-color: #ddd6fe;
  background: #f5f3ff;
  color: #4c1d95;
}

.comparison-panel {
  margin-bottom: 18px;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
}

.compare-card {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-soft);
}

.compare-card span {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
}

.compare-card strong {
  display: block;
  margin-top: 6px;
  font-size: 0.95rem;
}

.compare-card p,
.impact-list p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.impact-list {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.learning-outcome-panel {
  margin-bottom: 18px;
}

.learning-outcome-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.95fr 0.95fr;
  gap: 16px;
}

.learning-outcome-grid > div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-soft);
}

.learning-outcome-grid h3 {
  margin-bottom: 10px;
  font-size: 1rem;
}

.learning-verdict span {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 850;
  text-transform: uppercase;
}

.learning-verdict strong {
  display: block;
  margin-top: 8px;
  line-height: 1.45;
}

.learning-verdict p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.optimization-form {
  margin-top: 18px;
}

@media (max-width: 1040px) {
  .scenario-grid,
  .kpi-grid,
  .comparison-grid,
  .target-grid,
  .target-strip,
  .learning-outcome-grid,
  .benchmark-note-grid,
  .benchmark-card-grid,
  .mini-benchmark-grid,
  .attempt-summary,
  .attempt-row { grid-template-columns: repeat(2, 1fr); }

  .home-hero,
  .builder-header,
  .result-hero,
  .dashboard-grid { grid-template-columns: 1fr; }

  .builder-form,
  .form-grid,
  .form-grid.compact,
  .definition-grid { grid-template-columns: 1fr; }

  .multi-check-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  main { width: min(100% - 24px, 1220px); padding-top: 18px; }

  .topbar,
  .topbar nav,
  .section-head,
  .action-bar,
  .result-actions,
  .summary-banner {
    align-items: stretch;
    flex-direction: column;
  }

  .home-hero h1,
  .builder-header h1,
  .result-hero h1 {
    font-size: 2.5rem;
    line-height: 1.02;
  }

  .scenario-grid,
  .scenario-meta,
  .kpi-grid,
  .comparison-grid,
  .target-grid,
  .target-strip,
  .learning-outcome-grid,
  .benchmark-note-grid,
  .benchmark-card-grid,
  .mini-benchmark-grid,
  .attempt-summary,
  .attempt-row,
  .multi-check-grid { grid-template-columns: 1fr; }

  .builder-card,
  .panel,
  .learning-panel { padding: 18px; }
}