:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #666;
  --border: rgba(0, 0, 0, 0.08);
  --accent: #2563eb;
  --warn-bg: #fef3c7;
  --warn-border: #f59e0b;
  --warn-text: #78350f;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.kicker {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  margin: 0 0 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
  font-weight: 600;
}

h3 {
  font-size: 1.125rem;
  margin: 0 0 0.5rem;
  font-weight: 600;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration-thickness: 2px;
}

.muted {
  color: var(--muted);
  font-size: 0.9375rem;
}

/* Sandbox banner */
.sandbox-banner {
  background: var(--warn-bg);
  border-bottom: 1px solid var(--warn-border);
  color: var(--warn-text);
  font-size: 0.875rem;
  text-align: center;
  padding: 0.75rem 1.5rem;
  line-height: 1.5;
}

.sandbox-banner strong {
  font-weight: 700;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.logo {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-dot {
  color: var(--accent);
}

.site-header nav a {
  margin-left: 1.5rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9375rem;
}

.site-header nav a:hover {
  color: var(--accent);
}

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
}

.hero .lede {
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 36rem;
}

/* Products */
.products {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.product {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.product-tag {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--warn-text);
  background: var(--warn-bg);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  align-self: flex-start;
  margin-bottom: 0.75rem;
}

.product-desc {
  color: var(--muted);
  font-size: 0.9375rem;
  flex: 1;
}

.product-price {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  margin: 0.5rem 0 1rem;
}

.btn-disabled {
  width: 100%;
  padding: 0.625rem 1rem;
  background: #f3f4f6;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.875rem;
  cursor: not-allowed;
  font-family: inherit;
}

/* Info */
.info {
  padding: 3rem 0;
}

/* Content pages */
.content-page {
  padding: 3rem 0 4rem;
  max-width: 720px;
}

.content-page ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.content-page ul li {
  margin-bottom: 0.5rem;
}

.contact-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.contact-block p {
  margin: 0 0 0.5rem;
}

.contact-block p:last-child {
  margin-bottom: 0;
}

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 3rem;
  font-size: 0.875rem;
}

.footer-brand {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.footer-nav a {
  color: var(--muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--accent);
}

.footer-meta {
  color: var(--muted);
  margin: 0;
  font-size: 0.8125rem;
}