:root {
  color-scheme: light;
  --ink: #14213d;
  --muted: #607087;
  --line: #d9e0e6;
  --line-strong: #aab7c3;
  --mint: #edf8f2;
  --mint-strong: #cbead9;
  --coral: #e55d4a;
  --coral-dark: #ba3e30;
  --blue: #285f8f;
  --paper: #ffffff;
  --wash: #f7faf8;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--wash);
}

main {
  width: min(1440px, calc(100% - 48px));
  margin: 0 auto;
  padding: 26px 0 64px;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(229, 93, 74, 0.28);
  outline-offset: 2px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 36px;
  align-items: end;
  padding: 8px 0 26px;
  border-bottom: 2px solid var(--ink);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--coral-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 12px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 3.4rem;
  line-height: 1.03;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 8px;
  font-size: 1.28rem;
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 7px;
  font-size: 1rem;
  line-height: 1.35;
  letter-spacing: 0;
}

.lede {
  max-width: 850px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.62;
}

.review-note {
  border: 1px solid var(--line-strong);
  border-left: 5px solid var(--coral);
  padding: 16px 18px;
  background: var(--paper);
  line-height: 1.5;
}

.review-note strong {
  display: block;
  margin-bottom: 5px;
}

.review-note span {
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) 320px minmax(420px, 1.1fr);
  gap: 0;
  margin-top: 28px;
  border: 2px solid var(--ink);
  background: var(--paper);
}

.panel {
  min-width: 0;
  padding: 22px;
  border-right: 1px solid var(--line-strong);
}

.panel:last-child {
  border-right: 0;
}

.controls-panel {
  background: var(--mint);
}

.panel-top {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.step {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  color: var(--paper);
  background: var(--ink);
  border-radius: 50%;
  font-weight: 900;
}

.panel-top p,
.roster-footer p,
.split-summary,
.results-top p,
.leftover-note,
.support-grid p,
.support-grid li,
.example-grid p,
.faq-grid p {
  color: var(--muted);
  line-height: 1.62;
}

label,
legend {
  display: block;
  margin-bottom: 8px;
  font-weight: 900;
}

textarea {
  width: 100%;
  min-height: 365px;
  resize: vertical;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 14px;
  background:
    linear-gradient(to bottom, transparent 31px, rgba(170, 183, 195, 0.32) 32px)
      0 0 / 100% 32px,
    var(--paper);
  color: var(--ink);
  line-height: 32px;
}

.roster-footer {
  display: flex;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.roster-footer p {
  margin-bottom: 0;
}

.text-button,
.plain-button {
  border: 0;
  background: transparent;
  color: var(--blue);
  font-weight: 900;
  text-decoration: underline;
}

fieldset {
  margin: 0 0 18px;
  padding: 0;
  border: 0;
}

.mode-grid {
  display: grid;
  gap: 10px;
}

.mode-grid label {
  position: relative;
  margin: 0;
}

.mode-grid input {
  position: absolute;
  opacity: 0;
}

.mode-grid span {
  display: block;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 13px 14px;
  background: var(--paper);
}

.mode-grid input:checked + span {
  border-color: var(--ink);
  color: var(--paper);
  background: var(--ink);
}

.count-label,
.prefix-label {
  margin-bottom: 18px;
}

.stepper {
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  overflow: hidden;
  margin-top: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
}

.stepper button,
.stepper input,
.prefix-label input {
  min-height: 46px;
  border: 0;
  background: var(--paper);
  color: var(--ink);
}

.stepper button {
  color: var(--coral-dark);
  font-size: 1.15rem;
  font-weight: 900;
}

.stepper input {
  width: 100%;
  border-inline: 1px solid var(--line);
  text-align: center;
  font-weight: 900;
}

.prefix-label input {
  width: 100%;
  margin-top: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 0 12px;
}

.split-summary {
  min-height: 78px;
  margin: 0 0 18px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  padding: 13px 0;
}

.primary-actions {
  display: grid;
  gap: 10px;
}

.primary-button,
.secondary-button {
  min-height: 48px;
  border-radius: 6px;
  padding: 0 14px;
  font-weight: 900;
}

.primary-button {
  border: 1px solid var(--coral-dark);
  color: var(--paper);
  background: var(--coral);
}

.secondary-button {
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: var(--paper);
}

.result-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.assignment-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  min-height: 300px;
}

.empty-board {
  grid-column: 1 / -1;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  padding: 22px;
  background: #fbfdfc;
  color: var(--muted);
  line-height: 1.6;
}

.group-sheet {
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper);
}

.group-sheet h3 {
  margin: 0;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-strong);
  background: var(--mint-strong);
}

.group-sheet ol {
  margin: 0;
  padding: 8px 12px 10px 34px;
}

.group-sheet li {
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  line-height: 1.35;
}

.group-sheet li:last-child {
  border-bottom: 0;
}

.leftover-note {
  margin: 16px 0 0;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 42px;
  padding: 38px 0;
  border-bottom: 1px solid var(--line);
}

.support-grid article,
.examples-section,
.faq-section {
  min-width: 0;
}

.support-grid ol,
.support-grid ul {
  padding-left: 22px;
}

.support-grid li + li {
  margin-top: 8px;
}

.section-head {
  max-width: 760px;
  margin-bottom: 18px;
}

.examples-section,
.faq-section {
  padding: 38px 0;
  border-bottom: 1px solid var(--line);
}

.example-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.faq-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.example-grid article,
.faq-grid article {
  border-top: 3px solid var(--coral);
  padding-top: 14px;
}

@media print {
  body {
    background: #fff;
  }

  .hero,
  .roster-panel,
  .controls-panel,
  .result-actions,
  .support-grid,
  .examples-section,
  .faq-section {
    display: none;
  }

  main {
    width: 100%;
    padding: 0;
  }

  .workspace,
  .results-panel {
    display: block;
    border: 0;
  }
}

@media (max-width: 1150px) {
  main {
    width: min(100% - 32px, 820px);
  }

  .hero,
  .workspace,
  .support-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .panel {
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }

  .panel:last-child {
    border-bottom: 0;
  }

  .example-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  main {
    width: min(100% - 24px, 430px);
    padding-top: 18px;
  }

  h1 {
    font-size: 2.45rem;
  }

  .hero {
    gap: 20px;
  }

  .workspace {
    margin-top: 22px;
  }

  .panel {
    padding: 18px;
  }

  textarea {
    min-height: 260px;
  }

  .roster-footer,
  .result-actions,
  .assignment-board,
  .support-grid,
  .example-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .roster-footer {
    display: grid;
  }
}