:root {
  color-scheme: light;
  --ink: var(--color-ink);
  --muted: var(--color-muted);
  --paper: var(--color-canvas);
  --surface: var(--color-surface);
  --surface-raised: var(--color-surface-raised);
  --line: var(--color-border);
  --lime: var(--color-primary);
  --blue: var(--color-secondary);
  --coral: var(--color-attention);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--paper);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px),
    var(--paper);
  background-size: 44px 44px;
}

button {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.home-link {
  position: fixed;
  z-index: 20;
  top: 18px;
  left: 18px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: var(--surface-raised);
  box-shadow: 0 10px 25px color-mix(in srgb, var(--ink) 10%, transparent);
  font-size: 1.35rem;
  line-height: 1;
  text-decoration: none;
  transition: transform 160ms ease, color 160ms ease, border-color 160ms ease;
}

.home-link:hover {
  transform: translateY(-2px);
  border-color: var(--blue);
  color: var(--blue);
}

.page-decoration {
  position: fixed;
  z-index: 0;
  border-radius: 50%;
  pointer-events: none;
}

.page-decoration--lime {
  top: -220px;
  right: -180px;
  width: 510px;
  height: 510px;
  border: 92px solid color-mix(in srgb, var(--lime) 13%, transparent);
}

.page-decoration--blue {
  bottom: 6vh;
  left: -140px;
  width: 290px;
  height: 290px;
  border: 58px solid color-mix(in srgb, var(--blue) 7%, transparent);
}

.game-shell {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  min-height: 100vh;
  padding: 18px clamp(20px, 4vw, 72px) 28px;
}

.game-topbar {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-left: 54px;
}

.game-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 0.69rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-decoration: none;
}

.brand-mark {
  width: 27px;
  height: 27px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  padding: 4px;
  border-radius: 8px;
  background: var(--ink);
  transform: rotate(-3deg);
}

.brand-mark i {
  display: block;
  border-radius: 2px;
  background: var(--lime);
}

.brand-mark i:nth-child(2) { background: var(--paper); }
.brand-mark i:nth-child(3) { background: var(--blue); }
.brand-mark i:nth-child(4) { background: var(--coral); }
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.text-action,
.new-game-button {
  min-height: 44px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 850;
}

.text-action {
  border: 0;
  color: var(--muted);
  background: transparent;
  padding: 0 12px;
}

.text-action:hover {
  color: var(--blue);
}

.new-game-button {
  border: 1px solid var(--ink);
  color: var(--ink);
  background: var(--surface-raised);
  padding: 0 17px;
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.new-game-button:hover {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--ink);
}

.game-layout {
  min-height: calc(100vh - 78px);
  margin-top: -2px;
}

.intro-panel {
  max-width: 480px;
  padding-right: clamp(14px, 3vw, 48px);
}

.eyebrow,
.board-kicker,
.dialog-kicker {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.17em;
}

.intro-panel h1 {
  max-width: 430px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.55rem, 4.5vw, 4.8rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 0.91;
}

.intro-panel h1 em {
  display: block;
  color: var(--blue);
  font-weight: 500;
}

.intro-lead {
  max-width: 410px;
  margin: 20px 0 22px;
  color: var(--muted);
  font-size: clamp(0.9rem, 1.2vw, 1.02rem);
  line-height: 1.58;
}

.rules-list {
  display: grid;
  gap: 9px;
  margin: 0 0 22px;
}

.rules-list li {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rules-list li > span {
  width: 31px;
  height: 31px;
  flex: 0 0 31px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-raised);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
}

.rules-list p {
  display: grid;
  margin: 0;
  line-height: 1.25;
}

.rules-list strong {
  font-size: 0.79rem;
}

.rules-list small {
  color: var(--muted);
  font-size: 0.68rem;
}

.signal-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.signal-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.signal-legend i {
  width: 15px;
  height: 15px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  font-size: 0.55rem;
  font-style: normal;
}

.signal-legend__safe { background: var(--lime); }
.signal-legend__flag { color: var(--paper); background: var(--blue); }
.signal-legend__mine { border-radius: 50% !important; background: var(--coral); box-shadow: inset 0 0 0 4px var(--ink); }
.board-column {
  display: flex;
  justify-content: center;
}

.board-card {
  width: min(100%, 790px);
  padding: clamp(15px, 2vw, 24px);
  border: 1px solid var(--line);
  border-radius: clamp(22px, 3vw, 34px);
  background: color-mix(in srgb, var(--surface-raised) 92%, transparent);
  box-shadow: var(--shadow-raised);
  backdrop-filter: blur(9px);
}

.board-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 13px;
}

.board-kicker {
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 0.55rem;
}

.board-toolbar h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.difficulty-switch {
  display: flex;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--color-cell);
}

.difficulty-switch button {
  min-height: 40px;
  min-width: 78px;
  display: grid;
  place-content: center;
  border: 0;
  border-radius: 10px;
  color: var(--muted);
  background: transparent;
  font-size: 0.68rem;
  font-weight: 850;
  line-height: 1.05;
}

.difficulty-switch small {
  margin-top: 3px;
  font-size: 0.55rem;
  font-weight: 700;
  opacity: 0.7;
}

.difficulty-switch button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--lime);
  box-shadow: 0 5px 13px color-mix(in srgb, var(--ink) 10%, transparent);
}

.field-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin-bottom: 12px;
}

.field-meta > div {
  min-width: 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: color-mix(in srgb, var(--surface) 78%, transparent);
}

.field-meta span {
  overflow: hidden;
  color: var(--muted);
  font-size: 0.57rem;
  font-weight: 850;
  letter-spacing: 0.05em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.field-meta strong {
  min-width: 3.2ch;
  color: var(--ink);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.field-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin-top: 12px;
}

.tool-button,
.check-button,
.primary-button,
.dialog-text-button {
  min-height: 44px;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 850;
}

.tool-button,
.check-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.tool-button {
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--surface);
}

.tool-button[aria-pressed="true"] {
  border-color: var(--blue);
  color: var(--paper);
  background: var(--blue);
}

.check-button {
  border: 1px solid var(--ink);
  color: var(--ink);
  background: var(--lime);
}

.status-line {
  min-height: 18px;
  margin: 9px 4px 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 650;
  line-height: 1.35;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.game-dialog {
  position: relative;
  padding: 27px;
  border: 1px solid var(--line);
  border-radius: 26px;
  color: var(--ink);
  background: var(--surface-raised);
  box-shadow: var(--shadow-raised);
}

.dialog-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 12px;
  color: var(--muted);
  background: transparent;
  font-size: 1.5rem;
}

.dialog-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  border-radius: 18px;
  color: var(--ink);
  background: var(--lime);
  box-shadow: 5px 5px 0 var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 800;
}

.dialog-icon--result {
  color: var(--paper);
  background: var(--blue);
}

.game-dialog .modal-title {
  margin: 0 0 10px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: -0.04em;
}

.game-dialog > p:not(.dialog-kicker) {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.dialog-tip {
  margin: 8px 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
  background: var(--color-cell);
  font-size: 0.72rem;
  line-height: 1.4;
}

.dialog-tip span {
  display: inline-block;
  margin-right: 5px;
  color: var(--blue);
  font-weight: 900;
}

.primary-button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding: 0 17px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: var(--lime);
  box-shadow: 4px 4px 0 var(--ink);
}

.dialog-text-button {
  width: 100%;
  margin-top: 9px;
  border: 0;
  color: var(--blue);
  background: transparent;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin: 17px 0 4px;
}

.result-stats span {
  display: grid;
  gap: 3px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--color-cell);
}

.result-stats small {
  color: var(--muted);
  font-size: 0.56rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.result-stats b {
  font-size: 0.94rem;
  font-variant-numeric: tabular-nums;
}

.modal-backdrop.show {
  opacity: 0.46;
}