* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    16px/1.45 -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  user-select: none;
  -webkit-user-select: none;
}

button,
select {
  font: inherit;
  color: inherit;
}

button {
  min-height: 44px;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 8px;
  padding: 9px 13px;
  font-weight: 650;
  cursor: pointer;
}

button:hover {
  background: var(--panel2);
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

button:disabled:hover {
  background: var(--panel);
}

button:focus-visible,
select:focus-visible,
.cell:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 2px;
}

.primary,
.primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.primary:hover {
  filter: brightness(0.95);
}

select {
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  padding: 0 34px 0 11px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.app {
  width: min(1120px, 100%);
  margin: auto;
  padding: 24px 28px 36px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* The logo keeps the light region colors in both themes. */
.logo {
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: conic-gradient(from 90deg, #a9dfbf 0 25%, #aed6f1 0 50%, #f9e79f 0 75%, #d2b4de 0);
  box-shadow: inset 0 0 0 7px var(--bg);
}

.brand h1 {
  font-size: 24px;
  line-height: 1;
  margin: 0;
}

.brand p {
  font-size: 14px;
  color: var(--muted);
  margin: 5px 0 0;
}

.new-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.new-controls label {
  font-size: 14px;
  color: var(--muted);
}

.main {
  display: grid;
  grid-template-columns: minmax(340px, 620px) minmax(280px, 1fr);
  gap: 32px;
  align-items: start;
}

.side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (max-width: 820px) {
  .app {
    padding: 18px 16px 28px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 18px;
  }

  .new-controls {
    width: 100%;
  }

  .new-controls button {
    flex: 1;
  }

  .main {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .side {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .side .card:last-child,
  .hint-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .brand p,
  .new-controls label {
    display: none;
  }

  .side {
    display: flex;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}