:root {
  --bg: #f4efe7;
  --bg-accent: #eadcc6;
  --panel: rgba(255, 251, 245, 0.78);
  --line: rgba(92, 69, 47, 0.15);
  --ink: #1d1712;
  --muted: #6a5849;
  --success: #205d42;
  --success-bg: rgba(32, 93, 66, 0.1);
  --error: #8b2d1c;
  --error-bg: rgba(139, 45, 28, 0.1);
  --info: #385d8a;
  --info-bg: rgba(56, 93, 138, 0.1);
  --shadow: 0 24px 80px rgba(59, 40, 25, 0.12);
  --font-sans: "Avenir Next", "IBM Plex Sans", "Segoe UI", "Noto Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Menlo", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.72), transparent 30%),
    radial-gradient(circle at bottom right, rgba(205, 180, 145, 0.45), transparent 35%),
    linear-gradient(135deg, var(--bg), var(--bg-accent));
}

code,
.mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
}

.shell {
  width: min(100%, 1080px);
  margin: 0 auto;
  padding: 48px 20px;
}

.panel {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(22px);
  box-shadow: var(--shadow);
}

.hero {
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  color: var(--muted);
}

h1 {
  margin: 0;
  max-width: 10ch;
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  line-height: 0.92;
}

.lede {
  max-width: 54ch;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.6;
}

.request-card {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 24px 0;
}

.request-row {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.62);
}

.request-row span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.request-row strong {
  display: block;
  overflow-wrap: anywhere;
  font-size: 0.98rem;
}

.status {
  margin: 0 0 24px;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid transparent;
}

.status.info {
  color: var(--info);
  background: var(--info-bg);
  border-color: rgba(56, 93, 138, 0.2);
}

.status.success {
  color: var(--success);
  background: var(--success-bg);
  border-color: rgba(32, 93, 66, 0.2);
}

.status.error {
  color: var(--error);
  background: var(--error-bg);
  border-color: rgba(139, 45, 28, 0.2);
}

.google-slot {
  min-height: 56px;
}

.hint-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.hint-grid article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.55);
}

.hint-grid h2 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.hint-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.demo-shell {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 36px 20px 72px;
}

.demo-panel {
  padding: 28px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow);
}

.demo-panel + .demo-panel {
  margin-top: 24px;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: block;
  font-size: 0.9rem;
  color: var(--muted);
}

input,
textarea,
button {
  width: 100%;
  margin-top: 8px;
  border-radius: 14px;
  border: 1px solid rgba(92, 69, 47, 0.2);
  padding: 14px 16px;
  font: inherit;
}

button {
  cursor: pointer;
  color: #fff;
  background: linear-gradient(135deg, #1c6445, #3b8b5a);
}

pre {
  margin: 0;
  overflow-x: auto;
  border-radius: 16px;
  padding: 16px;
  background: #1e1b19;
  color: #f8f4ed;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 760px) {
  .panel,
  .demo-panel {
    padding: 22px;
  }

  .request-card,
  .hint-grid,
  .control-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: none;
  }
}