/* Assignment Tracker for Canvas: project site. No external fonts, scripts, or trackers. */

:root {
  --fg: #1f2a33;
  --muted: #56636c;
  --bg: #ffffff;
  --surface: #f4f7f8;
  --border: #d5dbdf;
  --brand: #23596b;
  --brand-strong: #1a4553;
  --on-brand: #ffffff;
  --link: #1f5f8b;
  --radius: 10px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6eaed;
    --muted: #aab4bb;
    --bg: #14181c;
    --surface: #1d2328;
    --border: #36414a;
    --brand: #4f9bb3;
    --brand-strong: #78b6ca;
    --on-brand: #0d1418;
    --link: #8cc4ef;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 16px;
  top: 16px;
  z-index: 10;
  padding: 8px 12px;
  background: var(--bg);
}

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

.narrow {
  max-width: 760px;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 700;
  text-decoration: none;
}

.logo img {
  width: 32px;
  height: 32px;
}

.site-header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header nav a {
  color: var(--fg);
  text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a[aria-current='page'] {
  text-decoration: underline;
}

/* Hero */

.hero {
  padding: 64px 0 40px;
  text-align: center;
}

.hero h1 {
  max-width: 820px;
  margin: 0 auto 16px;
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero .lead {
  max-width: 680px;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 1.15rem;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border: 2px solid var(--brand);
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}

.btn-primary {
  background: var(--brand);
  color: var(--on-brand);
}

.btn-primary:hover {
  background: var(--brand-strong);
  border-color: var(--brand-strong);
}

.btn-secondary {
  color: var(--fg);
}

.note {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.shot {
  margin: 40px auto 0;
  max-width: 920px;
}

.shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 12px 40px rgb(0 0 0 / 0.12);
}

.shot figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Sections */

section {
  padding: 48px 0;
}

section + section {
  border-top: 1px solid var(--border);
}

h2 {
  margin: 0 0 20px;
  font-size: 1.75rem;
  line-height: 1.25;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.card p {
  margin: 0;
  color: var(--muted);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.badges li {
  padding: 3px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.9rem;
  font-weight: 600;
}

ol.steps {
  padding-left: 1.3em;
}

ol.steps li + li {
  margin-top: 6px;
}

details {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

details summary {
  font-weight: 700;
  cursor: pointer;
}

details p {
  margin: 10px 0 0;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 0.85rem;
  line-height: 1.5;
}

pre code {
  padding: 0;
  background: none;
}

code {
  overflow-wrap: anywhere;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface);
  font-size: 0.92em;
}

/* Legal pages */

.legal {
  padding: 48px 0 64px;
}

.legal h1 {
  margin: 0 0 6px;
  font-size: 2.2rem;
  line-height: 1.2;
}

.legal .updated {
  margin: 0 0 32px;
  color: var(--muted);
}

.legal h2 {
  margin: 36px 0 12px;
  font-size: 1.3rem;
}

.legal table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.legal th,
.legal td {
  padding: 10px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.legal th {
  background: var(--surface);
}

.table-scroll {
  overflow-x: auto;
}

.callout {
  padding: 16px 20px;
  border-left: 4px solid var(--brand);
  border-radius: 4px;
  background: var(--surface);
}

.callout p {
  margin: 0;
}

/* Footer */

.site-footer {
  padding: 32px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.site-footer p {
  margin: 6px 0;
}