/* Namara — one stylesheet, shared by every page. No build step touches this file. */

:root {
  --bg: #eeefea;
  --panel: #e3e2d9;
  --ink: #1b1a17;
  --ink-muted: #5b5a54;
  --rule: #d2d1c6;
  --accent: #9c5e20;
  --accent-strong: #7c4a19;

  --font-body: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15130f;
    --panel: #201c15;
    --ink: #ece7da;
    --ink-muted: #938d7b;
    --rule: #332e25;
    --accent: #d79a4b;
    --accent-strong: #e8af63;
  }
}

/* ---------- reset ---------- */

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

html,
body,
h1, h2 {
  margin: 0;
  padding: 0;
}

p {
  margin: 0 0 1rem;
  padding: 0;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* ---------- base ---------- */

html {
  background: var(--bg);
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3.5rem 2rem 4.5rem;
}

/* ---------- page: exercise/archive layout (main + past pane) ---------- */

.page {
  max-width: 54rem;
  margin: 0 auto;
  padding: 3.5rem 2rem 4.5rem;
  display: grid;
  gap: 0 2.5rem;
  grid-template-columns: 1fr;
  grid-template-areas:
    "header"
    "langnav"
    "typenav"
    "main"
    "past"
    "footer";
}

.page > header {
  grid-area: header;
}

.page > .lang-nav {
  grid-area: langnav;
}

.page > .type-nav {
  grid-area: typenav;
}

.page > main {
  grid-area: main;
  min-width: 0;
}

.page > .past {
  grid-area: past;
  margin-top: 2rem;
}

.page > footer {
  grid-area: footer;
}

@media (min-width: 40rem) {
  .page {
    align-items: start;
    grid-template-columns: minmax(0, 1fr) 11rem;
    grid-template-areas:
      "header header"
      "langnav langnav"
      "typenav typenav"
      "main    past"
      "footer  footer";
  }

  .page > .past {
    margin-top: 0;
  }

  .page:not(:has(.past)) {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "langnav"
      "typenav"
      "main"
      "footer";
  }
}

/* ---------- masthead ---------- */

.masthead {
  margin-bottom: 2.5rem;
}

.masthead h1 {
  font-size: 1.75rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.masthead h1 a:hover {
  text-decoration: underline;
  text-decoration-color: var(--accent);
}

.tagline {
  margin: 0.35rem 0 0;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* ---------- home (index.html) ---------- */

.lede {
  font-size: 1.1875rem;
  line-height: 1.65;
}

.guide {
  margin: 2rem 0 2.5rem;
}

/* ---------- navigation ---------- */

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.lang-nav {
  margin-bottom: 0.5rem;
}

.type-nav {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
}

nav a {
  padding: 0.2rem 0.3rem;
  color: var(--ink-muted);
}

nav a::before {
  content: "[";
  margin-right: 0.15em;
  color: var(--rule);
}

nav a::after {
  content: "]";
  margin-left: 0.15em;
  color: var(--rule);
}

nav a:hover {
  color: var(--ink);
}

nav a.active {
  color: var(--accent-strong);
  font-weight: 700;
}

/* ---------- exercise ---------- */

h2 {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 0.5rem;
}

.code-frame {
  margin: 0 0 2rem;
  border: 1px solid var(--rule);
  border-radius: 5px;
  overflow: hidden;
  background: var(--panel);
}

.code-filename {
  margin: 0;
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}

.code-frame pre.code {
  margin: 0;
  border: none;
  border-radius: 0;
}

pre.code {
  margin: 0 0 2rem;
  padding: 1.25rem 1.5rem;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 3px;
  overflow-x: auto;
}

pre.code code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
  white-space: pre;
}

.question {
  margin: 0 0 2.25rem;
  font-size: 1.125rem;
  line-height: 1.65;
  max-width: 34rem;
}

/* ---------- answer ---------- */

details.answer {
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
}

details.answer summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

details.answer summary::-webkit-details-marker {
  display: none;
}

details.answer summary::before {
  content: "\25b8";
  display: inline-block;
  margin-right: 0.5em;
  color: var(--accent);
}

details.answer[open] summary::before {
  content: "\25be";
}

details.answer summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.answer-body {
  margin-top: 1rem;
  font-size: 1.0625rem;
  line-height: 1.65;
  max-width: 34rem;
}

.answer-body pre.code {
  margin-top: 0.75rem;
}

.answer-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--panel);
  padding: 0.1em 0.3em;
  border-radius: 2px;
}

/* ---------- past: the date pane, styled like a quiet changelog ---------- */

.past h2 {
  margin-bottom: 0.75rem;
}

.past-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.past-list a {
  color: var(--ink-muted);
}

.past-list a:hover {
  color: var(--ink);
}

.past-list .current {
  color: var(--accent-strong);
  font-weight: 700;
}

/* ---------- footer ---------- */

footer {
  margin-top: 4rem;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--ink-muted);
}

footer p:last-child,
.answer-body p:last-child {
  margin-bottom: 0;
}

.locale-nav {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.locale-nav a,
.locale-nav span {
  padding: 0.15rem 0.25rem;
}

.locale-nav a {
  color: var(--ink-muted);
}

.locale-nav a:hover,
.locale-nav span {
  color: var(--accent-strong);
}

@media (max-width: 39.99rem) {
  .wrap,
  .page {
    padding: 2.5rem 1.25rem 3.5rem;
  }
}

/* ---------- focus ---------- */

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