:root {
  --bg: #f6f6f1;
  --bg-accent: #efe8d8;
  --ink: #111111;
  --muted: #555555;
  --panel: #fffdf7;
  --line: #d6c8a9;
  --action: #1a7f5a;
  --action-hover: #0f5b40;
  --error: #b3261e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 10%, #ffffff 0, var(--bg) 45%, var(--bg-accent) 100%);
}

.shell {
  width: min(920px, 92vw);
  margin: 48px auto 64px;
  display: grid;
  gap: 24px;
}

.hero {
  background: transparent;
  color: var(--ink);
  border-radius: 18px;
  padding: 30px;
  display: grid;
  place-items: center;
}

.hero-logo {
  display: block;
  width: min(460px, 100%);
  height: auto;
  margin: 0 auto;
}

.kicker {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #d6c8a9;
}

.hero h1 {
  margin: 8px 0;
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  line-height: 1.1;
}

.sub {
  margin: 0;
  color: #d8d8d8;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 20px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.06);
}

h2 {
  margin-top: 0;
}

.stack {
  display: grid;
  gap: 10px;
}

.inline {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #ffffff;
}

.prefix {
  display: inline-flex;
  align-items: center;
  padding: 10px 12px;
  background: #f7f1e4;
  color: var(--muted);
  border-right: 1px solid var(--line);
  white-space: nowrap;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}

.inline input {
  border: 0;
  border-radius: 0;
}

button {
  justify-self: start;
  border: 0;
  border-radius: 999px;
  padding: 10px 18px;
  font: inherit;
  font-weight: 600;
  color: #ffffff;
  background: var(--action);
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
}

button:hover {
  background: var(--action-hover);
}

button:active {
  transform: translateY(1px);
}

.message {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
}

.error {
  color: var(--error);
  background: #fdecea;
}

.result {
  margin-top: 12px;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #ffffff;
}

.result p {
  margin: 0 0 8px;
}

.site-footer {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}

.site-footer a {
  color: inherit;
}

.docs {
  line-height: 1.7;
}

.docs p {
  margin: 0 0 14px;
}

.docs pre {
  margin: 8px 0 16px;
  background: #111111;
  color: #e8e8e8;
  border-radius: 10px;
  padding: 12px;
  overflow-x: auto;
}

.docs code {
  font-family: "SFMono-Regular", Menlo, monospace;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .shell {
    margin-top: 24px;
  }

  .hero {
    padding: 20px;
  }

  .prefix {
    font-size: 0.85rem;
    padding: 10px;
  }

  .site-footer {
    font-size: 0.92rem;
  }
}