:root {
  color-scheme: dark;
  font-size: 14px;
  --void-bg: #030303;
  --void-surface: rgba(255, 255, 255, 0.045);
  --void-border: rgba(255, 255, 255, 0.08);
  --void-accent: #4dffb3;
  --void-text: #d7d7d7;
  --void-muted: rgba(215, 215, 215, 0.62);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--void-bg);
  background-image: radial-gradient(
      1px 1px at 20px 20px,
      rgba(255, 255, 255, 0.25),
      transparent
    ),
    radial-gradient(1px 1px at 60px 40px, rgba(255, 255, 255, 0.18), transparent),
    radial-gradient(1.5px 1.5px at 90px 70px, rgba(255, 255, 255, 0.12), transparent);
  background-size: 120px 120px;
  color: var(--void-text);
  font-family: "Space Grotesk", "IBM Plex Sans", "Segoe UI", sans-serif;
  letter-spacing: 0.03em;
  display: flex;
  justify-content: center;
  align-items: stretch;
  padding: clamp(24px, 8vw, 64px);
}

.main-shell {
  width: min(980px, 100%);
  display: grid;
  gap: clamp(20px, 4vw, 32px);
}

.top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 22px;
  border: 1px solid var(--void-border);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.035), rgba(17, 17, 17, 0.35));
  backdrop-filter: blur(8px);
}

.top-bar .brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-title {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.brand-subtitle {
  font-size: 0.68rem;
  color: var(--void-muted);
}

.meta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-left: auto;
}

.meta-chip {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--void-muted);
}

.meta-chip span {
  color: var(--void-accent);
}

.meta-link {
  align-self: center;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--void-muted);
  text-decoration: none;
  transition: color 160ms ease;
}

.meta-link:hover {
  color: var(--void-accent);
}

.board-wrap {
  border: 1px solid var(--void-border);
  border-radius: 22px;
  background: rgba(12, 12, 12, 0.72);
  padding: clamp(20px, 4vw, 32px);
  display: grid;
  gap: 20px;
}

.board-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.board-title {
  margin: 0;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.board-description {
  margin: 0;
  font-size: 0.74rem;
  color: var(--void-muted);
  line-height: 1.55;
}

.controls-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--void-muted);
}

.control-input {
  appearance: none;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(12, 12, 12, 0.64);
  color: var(--void-text);
  font-size: 0.85rem;
  padding: 12px 16px;
  letter-spacing: 0.06em;
  transition: border-color 160ms ease;
}

.control-input:focus {
  outline: none;
  border-color: rgba(77, 255, 179, 0.5);
}

.control-hint {
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--void-muted);
}

.bomb-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.bomb-option {
  appearance: none;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: var(--void-text);
  padding: 8px 12px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.bomb-option[data-active="true"] {
  border-color: rgba(77, 255, 179, 0.6);
  background: rgba(77, 255, 179, 0.16);
  color: var(--void-accent);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.action-button {
  appearance: none;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: var(--void-text);
  padding: 12px 18px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.action-button:hover {
  border-color: rgba(77, 255, 179, 0.6);
}

.action-button.accent {
  border-color: rgba(77, 255, 179, 0.6);
  background: rgba(77, 255, 179, 0.16);
  color: var(--void-accent);
}

.action-button:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.metadata-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.metadata-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255, 255, 255, 0.03);
}

.metadata-label {
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--void-muted);
}

.metadata-value {
  font-size: 0.9rem;
  color: var(--void-accent);
  letter-spacing: 0.04em;
}

.mines-board {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}

.mines-cell {
  position: relative;
  padding-bottom: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.mines-cell.revealed.safe {
  background: rgba(77, 255, 179, 0.14);
  border-color: rgba(77, 255, 179, 0.5);
}

.mines-cell.revealed.bomb {
  background: rgba(255, 123, 123, 0.16);
  border-color: rgba(255, 123, 123, 0.6);
}

.mines-cell span {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 1rem;
  letter-spacing: 0.1em;
}

.log-line {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--void-muted);
}

.status-line {
  margin: 0;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--void-muted);
  transition: color 160ms ease;
}

.status-line[data-state="ok"] {
  color: var(--void-accent);
}

.status-line[data-state="error"] {
  color: rgba(255, 123, 123, 0.88);
}

@media (max-width: 700px) {
  body {
    padding: 18px;
  }

  .main-shell {
    gap: 18px;
  }

  .top-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .meta-row {
    margin-left: 0;
  }
}