:root {
  color-scheme: light;
  --bg: #f6f3ea;
  --surface: rgba(255, 252, 245, 0.82);
  --surface-strong: rgba(255, 252, 245, 0.96);
  --text: #111111;
  --muted: #5d5a53;
  --border: rgba(17, 17, 17, 0.12);
  --shadow: 0 24px 80px rgba(44, 34, 15, 0.12);
  --font-family: "Noto Sans JP", sans-serif;
  --font-size: 56px;
  --font-weight: 700;
  --letter-spacing: 0.02em;
  --word-gap: 20px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  background:
    radial-gradient(circle at top left, rgba(226, 104, 70, 0.22), transparent 30%),
    radial-gradient(circle at top right, rgba(255, 215, 127, 0.25), transparent 24%),
    linear-gradient(160deg, #f7f2e8 0%, #efe4cd 100%);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
}

.panel {
  display: none;
  min-height: 100vh;
}

.panel.is-active {
  display: block;
}

.panel-form {
  padding: 32px;
}

.panel__content {
  width: min(920px, 100%);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--border);
  border-radius: 32px;
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.panel__topbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 16px;
}

.locale-switcher {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-strong);
}

.locale-switcher__label {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--muted);
}

.locale-switcher select {
  width: auto;
  min-width: 112px;
  padding: 8px 12px;
  border-radius: 999px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #b94d1d;
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 0.94;
}

.intro {
  width: min(60ch, 100%);
  margin: 20px 0 0;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--muted);
}

.about-card {
  margin-top: 24px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(255, 248, 232, 0.72);
}

.about-card__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 800;
}

.about-card__body {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.controls {
  margin-top: 32px;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.controls-grid--compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-strong);
}

.field-text {
  padding: 20px;
}

.field__label {
  font-size: 0.9rem;
  font-weight: 700;
}

.field__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

input[type="text"],
select {
  width: 100%;
  border: 1px solid rgba(17, 17, 17, 0.16);
  border-radius: 14px;
  background: #fff;
  padding: 14px 16px;
}

input[type="text"] {
  font-size: 1.1rem;
}

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

input[type="color"] {
  inline-size: 100%;
  block-size: 48px;
  padding: 4px;
  border: 1px solid rgba(17, 17, 17, 0.16);
  border-radius: 12px;
  background: #fff;
}

output {
  color: var(--muted);
  font-size: 0.88rem;
}

.preview-card {
  margin-top: 24px;
  padding: 20px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
  overflow: hidden;
}

.preview-card__label {
  margin: 0 0 12px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.7;
}

.preview-card__sample {
  padding: 18px;
  border-radius: 18px;
  font-family: var(--font-family);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: var(--font-weight);
  letter-spacing: var(--letter-spacing);
  color: var(--text);
  background: var(--bg);
  word-spacing: var(--word-gap);
  line-height: 1.15;
}

.actions {
  margin-top: 24px;
}

.button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  cursor: pointer;
}

.button-primary {
  background: #111111;
  color: #fff8eb;
  font-weight: 700;
}

.panel-display {
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.panel-display.is-active {
  display: block;
}

.floating-button {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 3;
  appearance: none;
  border: 0;
  border-radius: 999px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: rgba(17, 17, 17, 0.88);
  color: #fff;
  cursor: pointer;
  backdrop-filter: blur(10px);
  font-size: 1.35rem;
  line-height: 1;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.22);
}

.pattern {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.pattern__item {
  position: absolute;
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size);
  font-weight: var(--font-weight);
  letter-spacing: var(--letter-spacing);
  color: var(--text);
  line-height: 0.92;
  white-space: nowrap;
}

@media (max-width: 760px) {
  .panel-form {
    padding: 16px;
  }

  .panel__topbar {
    justify-content: stretch;
  }

  .locale-switcher {
    width: 100%;
    justify-content: space-between;
  }

  .controls-grid,
  .controls-grid--compact {
    grid-template-columns: 1fr;
  }

  .pattern {
    height: 100vh;
  }
}