:root {
  --bg: #f2f2f7;
  --card: #ffffff;
  --text: #1c1c1e;
  --muted: #8e8e93;
  --brand: #4a7b59;
  --border: #e5e5ea;
  --danger: #ff3b30;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 560px; margin: 0 auto; padding: 24px 16px 64px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
.hidden { display: none; }
h1 { font-size: 24px; margin: 0 0 4px; font-weight: 600; }
h2 { font-size: 15px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.4px; margin: 28px 0 8px; }
.sub { color: var(--muted); margin: 0 0 20px; }
label { display: block; font-size: 14px; font-weight: 500; margin: 16px 0 6px; }
input, select {
  width: 100%;
  height: 46px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  background: #fbfbfd;
  color: var(--text);
}
input:focus, select:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
button {
  width: 100%;
  height: 50px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 20px;
}
button.primary { background: var(--brand); color: #fff; }
button.primary:disabled { opacity: 0.5; cursor: default; }
button.ghost { width: auto; height: auto; margin: 0; background: none; color: var(--brand); font-weight: 500; }
.row-between { display: flex; align-items: center; justify-content: space-between; }
.field-row { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; }
.msg { margin-top: 14px; font-size: 14px; min-height: 20px; }
.msg.error { color: var(--danger); }
.msg.ok { color: var(--brand); }
.version { color: var(--muted); font-size: 13px; margin-top: 20px; }

/* toggle switch */
.switch { position: relative; display: inline-block; width: 52px; height: 30px; }
.switch input { display: none; }
.slider {
  position: absolute; inset: 0; background: #ccc; border-radius: 999px; transition: 0.2s;
}
.slider::before {
  content: ""; position: absolute; height: 24px; width: 24px; left: 3px; top: 3px;
  background: #fff; border-radius: 50%; transition: 0.2s;
}
.switch input:checked + .slider { background: var(--brand); }
.switch input:checked + .slider::before { transform: translateX(22px); }