:root {
  --bg: #f3efe6;
  --bg-accent: #d9efe5;
  --surface: rgba(255, 250, 243, 0.8);
  --surface-strong: #fff8ef;
  --text: #1d2a24;
  --muted: #53645c;
  --line: rgba(29, 42, 36, 0.12);
  --primary: #185adb;
  --primary-dark: #0f429f;
  --secondary: #e2efe8;
  --shadow: 0 24px 80px rgba(24, 47, 39, 0.12);
  --ui-font: "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--ui-font);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(24, 90, 219, 0.14), transparent 30%),
    radial-gradient(circle at top right, rgba(0, 153, 102, 0.18), transparent 24%),
    linear-gradient(135deg, var(--bg), #f7f3eb 50%, var(--bg-accent));
}

button,
input,
textarea,
select {
  font: inherit;
  font-family: var(--ui-font);
}

.page-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(56px, 10vw, 112px) 0 72px;
}

.hero {
  max-width: 720px;
  margin: 0 auto clamp(24px, 4vw, 32px);
  text-align: center;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4.8vw, 3.6rem);
  line-height: 1;
}

.lead {
  max-width: 620px;
  margin: 14px auto 0;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--muted);
}

.panel {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
}

.generator {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.generator-full {
  width: min(100%, 760px);
  max-width: 760px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  margin-bottom: 20px;
  border-radius: 999px;
  background: rgba(24, 90, 219, 0.1);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.uuid-output {
  display: flex;
  align-items: center;
  min-height: 88px;
  padding: 10px 12px;
  border-radius: 24px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.85), rgba(226, 239, 232, 0.7)),
    var(--surface-strong);
  border: 1px solid rgba(29, 42, 36, 0.08);
}

.uuid-output code {
  font-family: "SFMono-Regular", "Menlo", "Consolas", monospace;
  font-size: clamp(1.08rem, 1.9vw, 1.3rem);
  line-height: 1.55;
  word-break: break-all;
  flex: 1;
}

.secondary-actions {
  display: flex;
  justify-content: flex-end;
  align-items: stretch;
  margin-top: 10px;
}

.actions {
  display: flex;
  margin-top: 20px;
}

.button,
.utility-button {
  appearance: none;
  border: 0;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    opacity 160ms ease;
}

.button:hover,
.utility-button:hover {
  transform: translateY(-1px);
}

.button:active,
.utility-button:active {
  transform: translateY(0);
}

.button {
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 0.95rem;
  font-weight: 700;
}

.button-copy {
  width: 100%;
  padding: 16px 20px;
  font-size: 1rem;
}

.button-copy.is-copied {
  background: #1f8f63;
}

.button-copy.is-copied:hover {
  background: #18724f;
}

.button-primary {
  background: var(--primary);
  color: #fff;
}

.button-primary:hover {
  background: var(--primary-dark);
}

.button[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

.utility-button {
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  border: 1px solid rgba(29, 42, 36, 0.1);
  font-size: 0.84rem;
  font-weight: 700;
}

.utility-regenerate-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 108px;
}

.utility-regenerate-button svg {
  display: block;
}

.status {
  min-height: 1.5em;
  margin: 14px 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

@media (max-width: 860px) {
  .page-shell {
    width: min(100% - 20px, 1080px);
    padding-top: 44px;
  }

  .generator {
    padding: 22px;
    border-radius: 22px;
  }

}

@media (max-width: 560px) {
  .hero h1 {
    line-height: 1.02;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions {
    flex-direction: column;
  }

  .button,
  .utility-button {
    width: 100%;
  }

  .utility-regenerate-button {
    justify-content: center;
  }
}