:root {
  --bg-0: #061b2d;
  --bg-1: #0c3353;
  --panel: rgba(8, 25, 40, 0.84);
  --line: rgba(132, 198, 255, 0.5);
  --text: #ecf4ff;
  --muted: #a4c4e2;
  --accent: #1ca8ff;
  --danger: #ff7b63;
  --warning: #fdb43f;
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  width: 100%;
  height: 100%;
  margin: 0;
  font-family: "Segoe UI", "Noto Sans KR", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 15%, #225f92, var(--bg-0) 55%), linear-gradient(120deg, var(--bg-0), var(--bg-1));
  overflow: hidden;
}

h1,
h2,
h3,
p {
  margin: 0;
}

button {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--text);
}

button.primary {
  background: linear-gradient(135deg, #1980d4, var(--accent));
}

button.ghost {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

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

.hidden {
  display: none !important;
}