:root {
  color-scheme: dark;
  --bg: #050816;
  --panel: #0f1730;
  --panel-2: #142247;
  --line: #355793;
  --text: #e6f3ff;
  --muted: #91a9cf;
  --cyan: #58e6ff;
  --pink: #ff5dd0;
  --green: #72ffaf;
  --amber: #ffd578;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 1.1rem;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 50% -20%, #1c3063 0%, #090f22 45%, #040611 100%);
  display: flex;
  justify-content: center;
}

.app {
  width: min(980px, 100%);
  display: grid;
  gap: 0.95rem;
}

.hero,
.hud,
.table-wrap,
.controls,
.tip {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(150deg, rgba(19, 30, 60, 0.9), rgba(9, 14, 30, 0.92));
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35), inset 0 0 0 1px rgba(148, 190, 255, 0.12);
}

.hero {
  padding: 0.95rem 1.15rem;
}

.hero h1 {
  margin: 0;
  color: var(--cyan);
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  letter-spacing: 0.04em;
  text-shadow: 0 0 14px rgba(88, 230, 255, 0.42);
}

.hero p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  max-width: 70ch;
}

.hud {
  padding: 0.75rem 0.85rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.hud div {
  background: rgba(8, 14, 31, 0.75);
  border: 1px solid rgba(141, 179, 240, 0.3);
  border-radius: 10px;
  padding: 0.48rem 0.58rem;
  display: grid;
  gap: 0.2rem;
}

.label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.hud strong {
  font-size: 1.2rem;
}

.table-wrap {
  padding: 0.75rem;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid rgba(117, 172, 255, 0.45);
  background: #03070f;
}

.status {
  margin: 0.65rem 0 0;
  min-height: 1.5em;
  color: var(--amber);
}

.status.good {
  color: var(--green);
}

.status.bad {
  color: #ff7f9f;
}

.controls {
  padding: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

button {
  border: 1px solid #3f63a8;
  border-radius: 10px;
  background: #182849;
  color: #ecf6ff;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.62rem 1rem;
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button:not(:disabled):hover {
  transform: translateY(-1px);
  filter: brightness(1.12);
}

.primary {
  background: linear-gradient(180deg, #2d50ba, #1e3c94);
  border-color: #6f95ff;
}

.tip {
  margin: 0;
  padding: 0.66rem 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}