:root {
  color-scheme: dark;
  --bg: #07100d;
  --surface: #0c1713;
  --surface-2: #11201a;
  --surface-3: #172a22;
  --line: #294238;
  --line-strong: #3f6556;
  --text: #f2f6ee;
  --muted: #9fb2a8;
  --accent: #f4b860;
  --accent-strong: #ffd188;
  --green: #65d6a1;
  --red: #ff8c7d;
  --blue: #80c7d9;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 18% -5%, rgba(62, 121, 95, 0.22), transparent 38rem),
    linear-gradient(180deg, #08120f 0%, var(--bg) 65%);
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="text"] {
  min-height: 48px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: #07100d;
  background: var(--accent);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.4rem 0 1rem;
  border-bottom: 1px solid var(--line);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-mark {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 0.65rem;
  color: var(--accent);
  background: var(--surface-2);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-weight: 800;
  letter-spacing: -0.05em;
}

.eyebrow {
  margin: 0 0 0.25rem;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.brand-name {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.header-status {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(12, 23, 19, 0.85);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.76rem;
}

.shell {
  width: min(1180px, calc(100% - 2rem));
  min-height: calc(100vh - 12rem);
  margin: 0 auto;
  padding: 2.2rem 0 4rem;
}

.loading-card,
.briefing,
.game-panel,
.debrief {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(12, 23, 19, 0.94);
  box-shadow: var(--shadow);
}

.loading-card {
  padding: 3rem;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 18ch;
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 4.8rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
  letter-spacing: -0.03em;
}

.briefing {
  overflow: hidden;
}

.briefing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(18rem, 0.7fr);
  gap: 2rem;
  padding: clamp(1.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(125deg, rgba(101, 214, 161, 0.08), transparent 55%),
    var(--surface);
}

.lede {
  max-width: 62ch;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.condition-card {
  align-self: end;
  padding: 1.25rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.8rem;
  background: rgba(17, 32, 26, 0.78);
}

.condition-card dl,
.state-detail-list {
  display: grid;
  gap: 0.8rem;
  margin: 0;
}

.condition-card div,
.state-detail-list div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.condition-card div:last-child,
.state-detail-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  text-align: right;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.briefing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.rules,
.start-form {
  padding: clamp(1.5rem, 4vw, 3rem);
}

.rules {
  border-right: 1px solid var(--line);
}

.rules-list {
  display: grid;
  gap: 0.9rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
}

.rules-list li {
  position: relative;
  padding-left: 1.4rem;
  line-height: 1.55;
}

.rules-list li::before {
  position: absolute;
  left: 0;
  color: var(--green);
  content: "—";
}

.field {
  display: grid;
  gap: 0.55rem;
  margin-top: 1.25rem;
}

.field-label,
legend {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

select,
input[type="text"] {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 0.55rem;
  outline: 0;
  color: var(--text);
  background: #09130f;
  padding: 0.75rem 0.9rem;
}

select:focus,
input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(244, 184, 96, 0.16);
}

fieldset {
  margin: 1.25rem 0 0;
  padding: 0;
  border: 0;
}

.radio-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
  margin-top: 0.65rem;
}

.radio-row label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  color: var(--muted);
  background: var(--surface-2);
  cursor: pointer;
}

.radio-row label:has(input:checked) {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(244, 184, 96, 0.11);
}

.radio-row input {
  position: absolute;
  opacity: 0;
}

.notice {
  margin: 1.4rem 0;
  padding: 0.9rem 1rem;
  border-left: 3px solid var(--blue);
  color: var(--muted);
  background: rgba(128, 199, 217, 0.06);
  font-size: 0.84rem;
  line-height: 1.5;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 0.55rem;
  padding: 0.75rem 1.1rem;
  font-weight: 800;
  cursor: pointer;
}

.primary-button {
  border: 1px solid var(--accent);
  color: #171007;
  background: var(--accent);
}

.primary-button:hover {
  background: var(--accent-strong);
}

.secondary-button {
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: var(--surface-2);
}

.primary-button:focus-visible,
.secondary-button:focus-visible {
  outline: 3px solid rgba(244, 184, 96, 0.35);
  outline-offset: 2px;
}

.game-panel {
  overflow: hidden;
}

.game-topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.35rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.week-number {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.4rem;
}

.progress-track {
  display: grid;
  grid-template-columns: repeat(36, 1fr);
  gap: 2px;
  width: min(46rem, 100%);
  height: 0.5rem;
}

.progress-track span {
  border-radius: 1px;
  background: var(--surface-3);
}

.progress-track .complete {
  background: var(--green);
}

.progress-track .current {
  background: var(--accent);
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.55fr);
}

.observation-column {
  padding: 1.5rem;
  border-right: 1px solid var(--line);
}

.state-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.metric-card {
  min-height: 7.3rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--surface-2);
}

.metric-label {
  display: block;
  min-height: 2.2em;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.metric-value {
  display: block;
  margin-top: 0.55rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1;
}

.metric-card.warn {
  border-color: rgba(255, 140, 125, 0.55);
}

.metric-card.warn .metric-value {
  color: var(--red);
}

.detail-panel,
.history-panel {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: rgba(9, 19, 15, 0.65);
}

.panel-title {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  white-space: nowrap;
}

th,
td {
  padding: 0.65rem 0.55rem;
  border-bottom: 1px solid var(--line);
  text-align: right;
}

th:first-child,
td:first-child {
  text-align: left;
}

th {
  color: var(--muted);
  font-weight: 700;
}

tbody tr:last-child td {
  border-bottom: 0;
}

.empty-history {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.decision-column {
  padding: 1.5rem;
  background: rgba(17, 32, 26, 0.62);
}

.decision-column .field {
  margin-top: 1rem;
}

.decision-column input {
  height: 4.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
}

.decision-actions {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.8rem;
}

.error-message {
  min-height: 1.35rem;
  margin: 0.65rem 0 0;
  color: var(--red);
  font-size: 0.84rem;
}

.decision-meta {
  margin-top: 1.3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.state-detail-list {
  font-size: 0.84rem;
}

.debrief {
  overflow: hidden;
}

.debrief-head {
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(125deg, rgba(244, 184, 96, 0.09), transparent 55%);
}

.debrief-head h1 {
  max-width: 15ch;
}

.debrief-body {
  padding: clamp(1.5rem, 5vw, 3.5rem);
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.score-card {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--surface-2);
}

.score-card.you {
  border-color: var(--accent);
  background: rgba(244, 184, 96, 0.08);
}

.score-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.score-value {
  display: block;
  margin-top: 0.7rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(1.8rem, 5vw, 3.1rem);
}

.score-note {
  display: block;
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.reward-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
}

.reward-value {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.45rem;
  color: var(--green);
}

.debrief-actions {
  margin-top: 1.5rem;
}

.site-footer {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.3rem 0 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.site-footer p {
  max-width: 85ch;
  margin: 0;
}

@media (max-width: 850px) {
  .briefing-hero,
  .game-layout {
    grid-template-columns: 1fr;
  }

  .briefing-grid {
    grid-template-columns: 1fr;
  }

  .rules,
  .observation-column {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .game-topbar {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .site-header {
    align-items: flex-start;
  }

  .header-status {
    display: none;
  }

  .shell {
    width: min(100% - 1rem, 1180px);
    padding-top: 1rem;
  }

  .briefing-hero,
  .rules,
  .start-form,
  .observation-column,
  .decision-column,
  .debrief-head,
  .debrief-body {
    padding: 1.15rem;
  }

  .state-grid,
  .score-grid {
    grid-template-columns: 1fr 1fr;
  }

  .metric-card {
    min-height: 6.4rem;
  }

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

  .radio-row label {
    justify-content: flex-start;
    padding-left: 1rem;
  }

  .reward-panel {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .primary-button,
  .secondary-button,
  select,
  input {
    transition: border-color 140ms ease, background-color 140ms ease, box-shadow 140ms ease;
  }
}