:root {
  --navy: #10263d;
  --navy-light: #173a5e;
  --navy-soft: #204b75;
  --background: #edf1f4;
  --panel: #ffffff;
  --panel-alt: #f7f9fb;
  --border: #c7d1da;
  --text: #172431;
  --muted: #5f6e7a;
  --green: #2f8f65;
  --green-dark: #246f50;
  --gold: #c59432;
  --red: #b44747;
  --orange: #bc6c25;
  color-scheme: light;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; background: var(--background); color: var(--text); }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }

#game-shell { min-height: 100%; display: flex; flex-direction: column; }
.topbar { min-height: 82px; display: flex; align-items: center; gap: 12px; padding: 12px 20px; color: white; background: var(--navy); border-bottom: 1px solid #071725; }
.brand { display: flex; align-items: center; gap: 12px; min-width: 290px; }
.brand img { border-radius: 10px; }
.brand h1 { margin: 0; font-size: 20px; letter-spacing: .035em; }
.brand p { margin: 2px 0 0; color: #dbe7f1; font-size: 13px; }
.top-metrics { margin-left: auto; color: #dbe7f1; text-align: right; font-size: 13px; line-height: 1.45; }
.clock { min-width: 135px; color: #f4cc70; font: 700 15px Consolas, monospace; text-align: center; }

.workspace { display: flex; flex: 1; min-height: 0; }
.sidebar { width: 215px; flex: 0 0 215px; display: flex; flex-direction: column; background: var(--navy-light); padding: 7px 0; }
.nav-button { width: 100%; border: 0; padding: 13px 20px; background: transparent; color: #edf5fb; text-align: left; font-weight: 650; }
.nav-button:hover, .nav-button:focus-visible { background: var(--navy-soft); outline: none; }
.nav-button.active { background: var(--green-dark); }
.nav-spacer { flex: 1; border-bottom: 1px solid rgba(255,255,255,.45); margin: 8px 14px; }

main { flex: 1; min-width: 0; padding: 22px; overflow: auto; }
footer { display: flex; justify-content: space-between; gap: 18px; min-height: 30px; padding: 6px 14px; background: var(--navy); color: #dbe7f1; font-size: 12px; }

h2 { margin: 0; color: var(--navy); font-size: 28px; }
h3 { margin: 0 0 9px; color: var(--navy); font-size: 17px; }
p { line-height: 1.5; }
.subtitle { margin: 3px 0 17px; max-width: 1000px; color: var(--muted); }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 3px; padding: 16px; }
.panel + .panel { margin-top: 14px; }
.panel-alt { background: var(--panel-alt); border: 1px solid #dbe3e9; padding: 12px; }
.hero { margin: 28px 0 18px; padding: 30px; }
.hero h2 { font-size: 34px; }
.hero p { max-width: 850px; font-size: 17px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.strong { font-weight: 700; }
.danger-text { color: var(--red); }
.success-text { color: var(--green-dark); }

.button { border: 1px solid #8f9aa3; border-radius: 2px; padding: 8px 13px; background: #eef1f3; color: var(--text); font-weight: 650; }
.button:hover { filter: brightness(.97); }
.button-primary { border-color: var(--green); background: var(--green); color: white; }
.button-danger { border-color: var(--red); background: var(--red); color: white; }
.button-light { background: #f0f0ee; }
.button-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(165px, 1fr)); gap: 10px; margin-bottom: 14px; }
.metric { background: white; border: 1px solid var(--border); padding: 13px; min-width: 0; }
.metric-label { display: block; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .045em; text-transform: uppercase; }
.metric-value { display: block; margin-top: 4px; color: var(--navy); font-size: 22px; font-weight: 750; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.metric-note { display: block; color: var(--muted); font-size: 12px; }
.split { display: grid; grid-template-columns: minmax(0, 3fr) minmax(285px, 2fr); gap: 14px; }
.split-equal { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }

.table-wrap { width: 100%; overflow: auto; border: 1px solid var(--border); background: white; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { position: sticky; top: 0; z-index: 1; padding: 9px 8px; background: #dfe7ed; color: var(--navy); border-bottom: 1px solid #aebcc7; text-align: left; white-space: nowrap; }
td { padding: 8px; border-bottom: 1px solid #e3e8ec; vertical-align: top; }
tbody tr:hover { background: #f2f6f8; }
tr.selectable { cursor: pointer; }
tr.selected { background: #e4eef5; box-shadow: inset 4px 0 var(--green); }
.number { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.center { text-align: center; }
.positive { color: var(--green-dark); }
.negative { color: var(--red); }
.warning { color: var(--orange); }

.field { display: flex; flex-direction: column; gap: 4px; min-width: 160px; }
.field label { color: var(--muted); font-size: 12px; font-weight: 650; }
input, select { min-height: 37px; border: 1px solid #9eacb7; border-radius: 2px; padding: 7px 9px; background: white; color: var(--text); }
input:focus, select:focus { outline: 2px solid #75a3c8; outline-offset: 1px; }
.form-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; }
.check-row { display: flex; gap: 8px; align-items: center; margin: 7px 0; }
.check-row input { min-height: auto; }
.form-grid { display: grid; grid-template-columns: 180px minmax(280px, 1fr); gap: 18px 24px; align-items: start; }
.difficulty-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.difficulty-card { display: block; cursor: pointer; }
.difficulty-card input { min-height: auto; margin-right: 6px; }
.difficulty-card:has(input:checked) { border-color: var(--green); box-shadow: inset 0 0 0 1px var(--green); }

.tabs { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 12px; }
.tab { padding: 8px 12px; border: 1px solid var(--border); background: #e9eef2; color: var(--navy); font-weight: 650; }
.tab.active { background: var(--navy-soft); border-color: var(--navy-soft); color: white; }
.event-list { display: grid; gap: 7px; max-height: 410px; overflow: auto; }
.event { border-bottom: 1px solid #e4e9ed; padding: 3px 0 8px; }
.event strong { display: block; }
.event-danger strong { color: var(--red); }
.event-warning strong { color: var(--orange); }
.event-success strong { color: var(--green-dark); }
.readiness { display: grid; gap: 7px; margin: 10px 0; }
.readiness div { padding: 8px 10px; background: var(--panel-alt); border-left: 4px solid #adb9c2; }
.readiness .met { border-left-color: var(--green); }
.bankruptcy { min-height: 420px; display: grid; align-content: center; justify-items: start; }
.bankruptcy h3 { color: var(--red); font-size: 38px; letter-spacing: .06em; }
.browser-note { display: flex; gap: 10px; padding: 10px 12px; margin-bottom: 14px; border: 1px solid #bfd2df; background: #f4f9fc; color: #3c596c; font-size: 13px; }
.mobile-nav { display: none; }

@media (max-width: 1050px) {
  .topbar { flex-wrap: wrap; }
  .brand { min-width: 250px; }
  .top-metrics { order: 3; width: 100%; text-align: left; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .split-equal { grid-template-columns: 1fr; }
  .difficulty-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .sidebar { width: 58px; flex-basis: 58px; overflow: hidden; }
  .nav-button { width: 215px; padding-left: 14px; font-size: 0; }
  .nav-button::first-letter { font-size: 14px; }
  .topbar { padding: 10px; }
  .brand img { width: 36px; height: 36px; }
  .brand h1 { font-size: 16px; }
  .clock { min-width: 110px; }
  main { padding: 12px; }
  .metric-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}