:root {
  --bg-1: #101820;
  --bg-2: #0b2b34;
  --panel: rgba(10, 12, 18, 0.84);
  --line: #4ab9d0;
  --text: #edf5f7;
  --accent: #ffdd57;
  --ok: #7ef29a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background: #173642;
}

#gameCanvas {
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: block;
  flex: 1 1 auto;
}

#ui {
  position: fixed;
  left: 50%;
  top: 12px;
  transform: translateX(-50%);
  z-index: 2;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  min-width: 260px;
  backdrop-filter: blur(4px);
}

#ui h1 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

#status {
  margin: 0 0 8px;
  font-size: 0.93rem;
}

#scoreLine {
  margin: 0 0 10px;
  font-size: 0.82rem;
  opacity: 0.92;
}

#status.success {
  color: var(--ok);
  font-weight: 600;
}

#status.error {
  color: #ff6b6b;
  font-weight: 700;
}

#resetBtn {
  border: 1px solid #2f8ca1;
  background: linear-gradient(180deg, #25596a, #1b3f4b);
  color: var(--text);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
  font-weight: 600;
}

#resetBtn:hover {
  border-color: #54d6f4;
}

#splash {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  text-align: center;
  background: #173642;
  color: var(--text);
  transition: opacity 0.45s ease;
}

#splash p {
  margin: 0;
  line-height: 1.65;
  font-size: 1.05rem;
  font-weight: 600;
}

#splash.hidden {
  opacity: 0;
  pointer-events: none;
}


@media (orientation: landscape) and (max-height: 700px) {
  body {
    display: flex;
    align-items: stretch;
  }

  #ui {
    position: relative;
    left: auto;
    top: auto;
    transform: none;
    margin: 12px 0 12px 12px;
    width: 320px;
    max-width: 40vw;
    min-width: 260px;
    align-self: flex-start;
  }

  #gameCanvas {
    width: calc(100vw - 344px);
    height: 100vh;
    height: 100dvh;
  }
}