@font-face {
  font-family: "Bebas Neue";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/bebas-neue-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/source-sans-3-latin.woff2") format("woff2");
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Source Sans 3", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: #F8FAFC;
  background: #020617;
  line-height: 1.5;
}
header, .guide { padding: 16px 20px; }
h1, h2 {
  font-family: "Bebas Neue", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  font-weight: 400;
  letter-spacing: 0.04em;
}
h1 { font-size: 2rem; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 14px 0 6px; }
header p, .hint { margin: 0; color: #CBD5E1; font-size: 0.95rem; }
.layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 12px;
  padding: 0 20px 8px;
}
.stage { min-width: 0; }
#view {
  width: 100%;
  height: min(68vh, 640px);
  background: #020617;
  display: block;
  border: 1px solid #1E293B;
}
.seat-label { font-size: 1.2rem; font-weight: 600; margin: 8px 0 2px; }
.indoor, .note { margin: 0 0 4px; color: #CBD5E1; }
.panel {
  background: #0B1220;
  border: 1px solid #1E293B;
  padding: 8px 12px 12px;
}
.row-ctl { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
button {
  font: inherit;
  color: #F8FAFC;
  background: transparent;
  border: 1px solid #334155;
  padding: 4px 10px;
  cursor: pointer;
}
button[aria-pressed="true"] {
  background: #16A34A;
  color: #F8FAFC;
  border-color: #16A34A;
}
.guide {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 28px;
  border-top: 1px solid #1E293B;
}
.guide p { margin: 0; }
.guide a { color: #4ADE80; }
@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; }
}
.seat-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; margin: 6px 0; }
.seat-grid button { padding: 7px 0; min-width: 0; }