:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1b1d21;
  --muted: #5b6270;
  --accent: #1f3a5f;
  --accent-text: #ffffff;
  --border: #d5d9e0;
  --warn: #b3261e;
  --vvh: 100vh;
  --vvtop: 0px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121418;
    --card: #1d2026;
    --text: #eceef2;
    --muted: #a3a9b5;
    --accent: #6f9bd8;
    --accent-text: #0d1117;
    --border: #353a44;
    --warn: #ff8a80;
  }
}

[hidden] { display: none !important; }
* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  padding:
    max(12px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    max(24px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
}

h1 { font-size: 1.4rem; margin: 0.2em 0 0.4em; }
h2 { font-size: 1.1rem; margin: 0 0 0.6em; }
.small { font-size: 0.9rem; color: var(--muted); }
.big-note { font-size: 1.05rem; font-weight: 600; }

.env { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; margin: 0 0 0.5em; font-size: 0.85rem; }
.env dt { color: var(--muted); }
.env dd { margin: 0; overflow-wrap: anywhere; }
.csp-line { margin: 0.2em 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  margin: 14px 0;
}

.btn {
  display: block;
  width: 100%;
  min-height: 52px;
  margin: 8px 0;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { opacity: 0.6; }
.btn:disabled { opacity: 0.45; }
.btn-primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn-quiet { font-weight: 400; color: var(--muted); }
.row { display: flex; gap: 8px; }
.row > .btn { flex: 1 1 0; }
.file-btn { position: relative; line-height: 32px; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; opacity: 0;
}

.out {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.92rem;
  background: var(--bg);
  border-radius: 8px;
  padding: 0;
  margin: 4px 0;
}
.out:not(:empty) { padding: 8px 10px; }
.warn { color: var(--warn); font-weight: 700; font-size: 1.15rem; margin: 0.4em 0; }
.relogin { border: 2px solid var(--warn); border-radius: 12px; padding: 10px; margin-top: 8px; }

.label { display: block; margin-top: 10px; font-size: 0.9rem; color: var(--muted); }
.memo, .copy-area {
  width: 100%;
  font: inherit;
  font-size: 16px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}
.copy-area { height: 10em; font-size: 12px; font-family: ui-monospace, Menlo, monospace; }

.thumbs { display: flex; gap: 10px; }
.thumbs figure { margin: 0; flex: 1 1 0; text-align: center; font-size: 0.85rem; color: var(--muted); }
.thumbs img { width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--border); }

.update-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  margin-bottom: 8px;
  background: var(--card);
  border: 2px solid var(--accent);
  border-radius: 12px;
}
.update-bar .btn { width: auto; flex: 0 0 auto; margin: 0; min-width: 96px; }
.update-bar span { flex: 1 1 auto; }

/* S1-14: 高さの見比べ用の重ね層 */
.vp-layer {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  background: var(--card);
  padding:
    env(safe-area-inset-top)
    env(safe-area-inset-right)
    env(safe-area-inset-bottom)
    env(safe-area-inset-left);
}
.vp-100vh { height: 100vh; }
.vp-100dvh { height: 100dvh; }
.vp-js { top: var(--vvtop); height: var(--vvh); }
.vp-top { background: #d93025; color: #fff; font-weight: 700; padding: 8px 12px; }
.vp-body { flex: 1 1 auto; overflow: auto; padding: 8px 12px; }
.vp-mode { font-size: 1.2rem; font-weight: 700; margin: 0 0 6px; }
.vp-metrics { white-space: pre-wrap; font-size: 0.85rem; margin: 0; }
.vp-bottom { padding: 0 12px; }
.vp-input {
  width: 100%;
  min-height: 48px;
  font-size: 16px;
  padding: 8px 10px;
  border: 2px solid var(--accent);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
}
.vp-bottom-label { background: #1a73e8; color: #fff; font-weight: 700; padding: 8px 12px; margin: 0 -12px; }

.sa-probe {
  position: fixed;
  visibility: hidden;
  pointer-events: none;
  top: 0;
  left: 0;
  padding:
    env(safe-area-inset-top)
    env(safe-area-inset-right)
    env(safe-area-inset-bottom)
    env(safe-area-inset-left);
}