:root {
  --bg: #04070e;
  --panel: rgba(8, 16, 28, 0.78);
  --cyan: #19d3ff;
  --green: #7af9c0;
  --line: rgba(25, 211, 255, 0.30);
  --text: #cfe9f5;
  --dim: #6f93a6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background:
    radial-gradient(1200px 700px at 50% -10%, rgba(25,211,255,0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.shell {
  width: min(960px, 100%);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.title { display: flex; align-items: baseline; gap: 12px; }
.logo {
  font-weight: 800;
  font-size: 26px;
  letter-spacing: 6px;
  color: var(--cyan);
  text-shadow: 0 0 14px rgba(25, 211, 255, 0.7);
}
.sub { color: var(--dim); font-size: 13px; letter-spacing: 1px; }

.tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.tab {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.tab:hover { border-color: var(--cyan); }
.tab.active {
  border-color: var(--cyan);
  color: #fff;
  box-shadow: 0 0 14px rgba(25, 211, 255, 0.4);
  background: rgba(25, 211, 255, 0.10);
}

.stage {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(25, 211, 255, 0.12), inset 0 0 60px rgba(0,0,0,0.6);
  line-height: 0;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background: var(--bg);
}

.overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(2, 6, 12, 0.55);
  backdrop-filter: blur(3px);
  line-height: normal;
}
.overlay.show { display: flex; animation: fade 0.25s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.card {
  text-align: center;
  padding: 32px 40px;
  border: 1px solid var(--green);
  border-radius: 14px;
  background: rgba(6, 18, 16, 0.9);
  box-shadow: 0 0 40px rgba(122, 249, 192, 0.35);
}
.card h1 {
  margin: 0 0 6px;
  font-size: 40px;
  letter-spacing: 4px;
  color: var(--green);
  text-shadow: 0 0 18px rgba(122, 249, 192, 0.7);
}
.card p { margin: 0 0 20px; color: var(--dim); }
.btns { display: flex; gap: 12px; justify-content: center; }

button.ghost, button.primary {
  border-radius: 9px;
  padding: 10px 18px;
  font-size: 14px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  transition: all 0.15s ease;
}
button.primary {
  border-color: var(--green);
  color: #052;
  background: var(--green);
  font-weight: 700;
  box-shadow: 0 0 18px rgba(122, 249, 192, 0.5);
}
button.ghost:hover { border-color: var(--cyan); }
button.primary:hover { filter: brightness(1.1); }

.bottombar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
}
.mapinfo { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.mname { color: var(--cyan); font-weight: 700; letter-spacing: 1px; }
.mhint { color: var(--dim); }
.keys { color: var(--dim); }

kbd {
  display: inline-block;
  min-width: 18px;
  text-align: center;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--panel);
  color: var(--text);
  font-size: 11px;
  font-family: inherit;
}