/* Site shell for gamesandai.org: tokens, base type, header and footer.
   Course pages under learn/goblin-express-academy/ load academy.css instead,
   which styles the same header and footer markup in the course's palette. */

/* ---- tokens ---------------------------------------------------------- */
:root {
  color-scheme: light;
  --bg: #fbfaf8;
  --bg-raised: #ffffff;
  --fg: #1b1a18;
  --fg-muted: #5e5a54;
  --border: #e3ded6;
  --accent: #a8452a;
  --accent-fg: #ffffff;
  --code-bg: #f4f1ec;

  --font-body: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --measure: 68ch;
  --wide: 1140px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --bg: #14130f;
    --bg-raised: #1d1b17;
    --fg: #edeae4;
    --fg-muted: #a09a90;
    --border: #322e28;
    --accent: #e08b6c;
    --accent-fg: #14130f;
    --code-bg: #201e19;
  }
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #14130f;
  --bg-raised: #1d1b17;
  --fg: #edeae4;
  --fg-muted: #a09a90;
  --border: #322e28;
  --accent: #e08b6c;
  --accent-fg: #14130f;
  --code-bg: #201e19;
}

/* ---- reset ----------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
}

[hidden] {
  display: none !important;
}

a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
  text-underline-offset: 0.18em;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 2rem 0 0.6rem;
}

h1 {
  font-size: clamp(2rem, 1.4rem + 2.2vw, 2.9rem);
  margin-top: 0;
}
h2 {
  font-size: 1.55rem;
}
h3 {
  font-size: 1.2rem;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 4px;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---- layout helpers -------------------------------------------------- */
.wrap {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
}

.prose {
  width: min(100% - 2.5rem, var(--measure));
  margin-inline: auto;
}

.muted {
  color: var(--fg-muted);
}

.eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--fg-muted);
  font-weight: 600;
  margin: 0 0 0.3rem;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 0.55rem 1.05rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 550;
  font-size: 0.95rem;
}

.button:hover {
  color: var(--accent-fg);
  filter: brightness(1.08);
}

/* ---- header and footer ----------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-raised);
  padding-top: env(safe-area-inset-top, 0px);
}

.site-header-inner {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.1rem;
  flex-wrap: wrap;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.22rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  gap: 1.3rem;
  font-size: 0.95rem;
}

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

.site-nav a:hover,
.site-nav a[aria-current] {
  color: var(--accent);
}

.site-main {
  padding: 3rem 0 4rem;
  min-height: 60vh;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.6rem 0 calc(1.6rem + env(safe-area-inset-bottom, 0px));
  font-size: 0.9rem;
  color: var(--fg-muted);
}

.site-footer-inner {
  width: min(100% - 2.5rem, var(--wide));
  margin-inline: auto;
}

.site-footer p {
  margin: 0;
}

/* ---- home ------------------------------------------------------------ */
.home-hero {
  max-width: 46rem;
  margin-bottom: 3.5rem;
}

.lede {
  font-size: 1.18rem;
  color: var(--fg-muted);
  margin-bottom: 0.7rem;
}

.scope-note {
  font-size: 0.95rem;
  margin: 0 0 1.6rem;
}

.section-title {
  margin-top: 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* ---- course cards (home and Learn index) ----------------------------- */
.course-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1.5rem;
}

.course-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-raised);
  padding: 1.25rem 1.4rem;
  text-decoration: none;
  max-width: 46rem;
}

.course-card:hover {
  color: inherit;
  border-color: var(--accent);
}

.course-card svg {
  width: 72px;
  height: auto;
}

.course-card h3 {
  margin: 0;
  font-size: 1.4rem;
}

.course-card:hover h3 {
  color: var(--accent);
}

.course-card .tagline {
  font-style: italic;
  margin: 0.1rem 0 0.5rem;
  color: var(--fg-muted);
}

.course-card p {
  margin: 0 0 0.5rem;
}

.course-card .course-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin: 0;
}

@media (max-width: 520px) {
  .course-card {
    grid-template-columns: minmax(0, 1fr);
  }
}