:root {
  --font-family: "M PLUS Rounded 1c", "Hiragino Maru Gothic ProN", "Yu Gothic",
    "Meiryo", system-ui, -apple-system, "Segoe UI", sans-serif;

  --accent-a: #ff6fb1;
  --accent-b: #b79dff;
  --accent-c: #42e8ff;

  --bg0: #0b0712;
  --bg1: #120a22;
  --card: rgba(255, 255, 255, 0.06);
  --card2: rgba(255, 255, 255, 0.10);
  --stroke: rgba(255, 255, 255, 0.14);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);

  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body.page-settings {
  color: var(--text);
  font-family: var(--font-family);
  background:
    radial-gradient(1000px 700px at 20% 0%, rgba(255, 111, 177, 0.18), transparent 55%),
    radial-gradient(900px 700px at 90% 15%, rgba(183, 157, 255, 0.16), transparent 58%),
    radial-gradient(700px 700px at 85% 90%, rgba(66, 232, 255, 0.10), transparent 60%),
    linear-gradient(180deg, var(--bg1), var(--bg0));
}

a {
  color: rgba(255, 255, 255, 0.86);
}

.header {
  padding: 22px 18px 10px;
}

.header__title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
}

.header__sub {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 18px 22px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 14px;
}

@media (max-width: 920px) {
  .app {
    grid-template-columns: 1fr;
  }
}

.card {
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  background:
    linear-gradient(180deg, var(--card2), rgba(255, 255, 255, 0) 65%),
    var(--card);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.card__hd {
  padding: 14px 14px 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.card__hdTitle {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
}

.card__bd {
  padding: 14px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 520px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.field {
  display: grid;
  gap: 6px;
}

.label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.78);
}

.row {
  display: flex;
  gap: 10px;
  align-items: center;
}

input[type='text'],
select {
  width: 100%;
  height: 38px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.22);
  color: var(--text);
  outline: none;
}

input[type='text']::placeholder {
  color: rgba(255, 255, 255, 0.48);
}

input[type='range'] {
  width: 100%;
}

input[type='color'] {
  width: 54px;
  height: 38px;
  padding: 0;
  border: none;
  background: transparent;
}

.chk {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.18);
}

.btn {
  height: 38px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.22);
  color: rgba(255, 255, 255, 0.92);
  cursor: pointer;
}

.btn:hover {
  border-color: rgba(255, 111, 177, 0.35);
}

.urlBox {
  display: grid;
  gap: 8px;
}

.urlBox__out {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 12px;
}

.preview {
  height: 320px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  overflow: hidden;
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.06) 0 25%, transparent 25% 50%, rgba(255, 255, 255, 0.06) 50% 75%, transparent 75% 100%),
    rgba(0, 0, 0, 0.25);
  background-size: 24px 24px;
}

.preview iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.tips {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
  line-height: 1.55;
}

.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.86);
}