:root {
  color-scheme: light;
  --background: #f4f5f2;
  --surface: #ffffff;
  --surface-muted: #eff2ef;
  --border: #dfe4e0;
  --foreground: #222c29;
  --secondary-text: #56635e;
  --accent: #385850;
  --accent-hover: #29463f;
  --accent-soft: #e6efea;
  --warning: #744b25;
  --warning-soft: #f8eee1;
  --display: "Yu Gothic UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-family: var(--display);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; color: var(--foreground); background: var(--background); }
button, select, input { font: inherit; }
button, select, summary { cursor: pointer; }
button:disabled { cursor: default; opacity: .46; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.masthead {
  width: min(1240px, calc(100% - 48px));
  min-height: 78px;
  display: flex;
  align-items: center;
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; gap: 12px; align-items: center; margin: 0; font-size: 1rem; font-weight: 700; letter-spacing: .025em; }
.brand img { flex: none; }
.shell { width: min(1240px, calc(100% - 48px)); margin: 0 auto; padding: 28px 0; }
.workspace { display: grid; grid-template-columns: minmax(0, 1fr) 300px; align-items: start; gap: 18px; }
.remote .workspace { grid-template-columns: 1fr; }

.monitor, .controls { min-width: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; }
.monitor { overflow: hidden; }
.monitor-bar { min-height: 49px; padding: 9px 16px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.status-badge { display: inline-flex; align-items: center; gap: 7px; border-radius: 100px; padding: 5px 10px; background: var(--surface-muted); color: var(--secondary-text); font-size: .75rem; }
.status-badge i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-badge[data-phase="playing"] { background: var(--accent-soft); color: var(--accent); }
.status-badge[data-phase="connecting"], .status-badge[data-phase="reconnecting"],
.status-badge[data-phase="error"], .status-badge[data-phase="locked"] { background: var(--warning-soft); color: var(--warning); }
.resolution { color: var(--secondary-text); font: .78rem "Cascadia Mono", Consolas, monospace; }
.screen { display: grid; place-items: center; position: relative; aspect-ratio: 16 / 9; background: #1e2523; overflow: hidden; }
.screen > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; background: #161b19; }
.empty { display: grid; justify-items: center; gap: 9px; padding: 12px; color: #c5cfca; text-align: center; font-size: .84rem; }
.empty p { margin: 0; }
.reticle { fill: none; stroke: #a4b3ab; stroke-width: 1.35; stroke-linejoin: round; }

.controls { padding: 14px; }
.controls section { padding: 0 4px 3px; }
h2 { margin: 0 0 12px; font-size: .93rem; }
.mode-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; padding: 4px; margin-bottom: 17px; border-radius: 12px; background: var(--surface-muted); }
.mode-switch button { min-height: 37px; border: 1px solid transparent; border-radius: 9px; background: transparent; color: var(--secondary-text); font-size: .82rem; }
.mode-switch button[aria-pressed="true"] { color: var(--foreground); background: var(--surface); border-color: var(--border); font-weight: 700; }
.hint { color: var(--secondary-text); margin: 0 0 10px; font-size: .79rem; line-height: 1.65; }
label { display: block; margin: 12px 0 5px; color: var(--secondary-text); font-size: .76rem; }
input, select { width: 100%; min-height: 42px; border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; color: var(--foreground); background: var(--surface); font-size: .83rem; }
input::placeholder { color: var(--secondary-text); }
input:disabled, select:disabled { background: var(--surface-muted); }
.field-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 6px; }
.link-button { padding: 4px; border: 0; color: var(--accent); background: transparent; font-size: .76rem; }
.actions { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 9px; }
.primary, .secondary { min-height: 42px; border: 1px solid transparent; border-radius: 10px; padding: 8px 12px; font-size: .82rem; font-weight: 700; text-align: center; }
.primary { color: #fff; background: var(--accent); }
.primary:not(:disabled):hover { background: var(--accent-hover); }
.secondary { color: var(--foreground); border-color: var(--border); background: var(--surface); }
.secondary:not(:disabled):hover { background: var(--surface-muted); }
#start { flex: 1; }
#start span { margin-right: 3px; font-size: .67rem; }
.share-start { display: block; width: 100%; }
.guide { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); color: var(--secondary-text); font-size: .77rem; }
.guide p { margin: 9px 0 0; line-height: 1.7; }
.invite { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.invite img { display: block; margin: 0 auto; }
.notice { margin: 11px 4px 2px; padding: 8px 10px; border-radius: 8px; background: var(--warning-soft); color: var(--warning); font-size: .78rem; line-height: 1.55; }

.setup { max-width: 660px; display: grid; gap: 14px; }
.setup-card { padding: 20px 22px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; }
.setup-card h2 { font-size: 1rem; }
.setup-card ol { margin: 10px 0 14px; padding-left: 1.4em; color: var(--secondary-text); font-size: .86rem; line-height: 1.8; }
.setup-card a:not(.setup-action) { color: var(--accent); }
.setup-action { display: inline-flex; align-items: center; text-decoration: none; }

@media (max-width: 740px) {
  .masthead, .shell { width: calc(100% - 28px); }
  .masthead { min-height: 62px; }
  .shell { padding: 16px 0; }
  .workspace { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .monitor, .controls { border-radius: 15px; }
  input, select { font-size: 16px; }
}