/* Proper Course website. Plain CSS, no build step. */

:root {
  --text: #3a4246;
  --heading: #2f383c;
  --muted: #6b7378;
  --link: #2f383c;
  --notice-bg: #e3e6ef;
  --rule: #d9dde0;
  --bg: #ffffff;

  --font-heading: "Source Serif 4", Georgia, serif;
  --font-body: "Pontano Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
}

a { color: var(--link); text-underline-offset: 3px; }
a:hover { color: #000; }

img { max-width: 100%; height: auto; display: block; }

/* Header */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 40px;
}

.wordmark {
  font-family: var(--font-body);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #111;
  text-decoration: none;
}

.site-nav { display: flex; gap: 20px; font-size: 16px; }
.site-nav a { text-decoration: none; white-space: nowrap; }
.site-nav a:hover, .site-nav a[aria-current="page"] { text-decoration: underline; }

/* Banner photo with a gentle wave along its bottom edge. The curve is the
   #banner-wave clip path defined at the top of index.html, the same shape
   Squarespace used: one S-curve across the full width. */

.banner {
  height: 250px;
  overflow: hidden;
  -webkit-clip-path: url(#banner-wave);
  clip-path: url(#banner-wave);
}

.banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
}

/* Main content */

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 40px 64px;
}

.product {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 270px;
  gap: 48px;
  align-items: start;
}

.app-icon {
  width: 110px;
  border-radius: 24px;
}

h1 {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 82px;
  line-height: 1.05;
  color: var(--heading);
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

h2, h3 {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--heading);
  line-height: 1.25;
}

.notice {
  background: var(--notice-bg);
  padding: 16px 16px;
  margin: 0 0 24px;
}

.notice p { margin: 0; }

.screenshot { width: 100%; }

.page-links { margin-top: 40px; font-size: 15px; }

/* Long-form text pages (privacy policy) */

.prose { max-width: 760px; margin: 0 auto; }
.prose h1 { font-size: 56px; }
.prose h2 { font-size: 32px; margin: 48px 0 12px; }
.prose h3 { font-size: 22px; margin: 36px 0 8px; }
.prose li { margin-bottom: 8px; }
.prose .updated { color: var(--muted); }
.prose .toc { padding-left: 1.4em; }

.table-wrap { overflow-x: auto; margin: 16px 0; }
.prose table { border-collapse: collapse; font-size: 15px; min-width: 520px; }
.prose td, .prose th {
  border: 1px solid var(--rule);
  padding: 8px 10px;
  vertical-align: top;
  text-align: left;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--rule);
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 40px 40px;
  font-size: 14px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
}

.site-footer a { color: var(--muted); }

/* Narrow screens */

@media (max-width: 900px) {
  .product { grid-template-columns: 80px minmax(0, 1fr); gap: 24px; }
  .app-icon { width: 80px; border-radius: 18px; }
  .product .screenshot-col { grid-column: 1 / -1; max-width: 300px; margin: 0 auto; }
  h1 { font-size: 56px; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .site-header { padding: 18px 16px; flex-wrap: wrap; row-gap: 6px; }
  .site-nav { gap: 16px; font-size: 15px; }
  .wordmark { font-size: 22px; }
  .banner { height: 160px; }
  main { padding: 24px 16px 48px; }
  .site-footer { padding: 20px 16px 32px; }
  .product { grid-template-columns: 1fr; }
  .app-icon { width: 72px; border-radius: 16px; }
  h1 { font-size: 44px; margin-bottom: 16px; }
  .prose h1 { font-size: 40px; }
}