:root {
  --bg: #f4f7f6;
  --card: #ffffff;
  --text: #1f2d2a;
  --muted: #6b7b77;
  --primary: #1f8a70;
  --primary-dark: #17705a;
  --danger: #c0392b;
  --line: #dde5e2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.6;
  font-size: 16px;
}

#app { max-width: 640px; margin: 0 auto; padding: 0 16px 48px; }

h2 { font-size: 1.25rem; margin: 24px 0 12px; }
h3 { font-size: 1.05rem; margin: 0 0 4px; }

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; color: var(--primary-dark); text-decoration: none; }
.who { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin: 12px 0;
}

.auth { margin-top: 32px; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}
.tab.on { background: var(--primary); color: #fff; border-color: var(--primary); }

label { display: block; margin: 12px 0; }
.lbl { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 4px; }

input[type="text"], input[type="email"], input[type="password"], textarea, select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 0; }

.btn {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
}
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.small { padding: 6px 10px; font-size: 0.85rem; }
.btn.danger { color: var(--danger); border-color: var(--danger); }
.btn:disabled { opacity: 0.5; cursor: default; }

.msg { color: var(--danger); min-height: 1.4em; margin: 8px 0; font-size: 0.9rem; }
.msg.ok { color: var(--primary-dark); }

.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 12px 0; }
.tile {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 12px;
  text-align: center;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}
a.tile:hover { border-color: var(--primary); }
.tile.off { color: var(--muted); font-weight: 400; background: #eef2f1; }
.tile .sub { display: block; font-size: 0.75rem; font-weight: 400; color: var(--muted); }

.body { white-space: pre-wrap; word-break: break-word; margin: 8px 0; }
.code { font-family: ui-monospace, Menlo, monospace; font-size: 1.1rem; letter-spacing: 0.1em; font-weight: 700; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 6px 0; }
.row .grow { flex: 1; min-width: 140px; }
ul.plain { list-style: none; padding: 0; margin: 6px 0; }
ul.plain li { padding: 4px 0; border-bottom: 1px dashed var(--line); }