/* The static pages (guide, FAQ, blog) written by scripts/build-pages.mjs.
   The landing's world, read mode: a night bar, paper below, Literata on
   headings, Inter for reading, JetBrains Mono on dates and labels, the
   locked indigo as the one accent. Values mirror src/design/habit.css. */

:root {
  --ink: #0b0d0d;
  --paper: #f4f4f1;
  --surface: #ffffff;
  --text: #141716;
  --muted: #4d504e;
  --subtle: #6b6d6b;
  --line: #e6e6e2;
  --accent: #4f46e5;
  --accent-text: #4338ca;
  --accent-soft: rgba(79, 70, 229, 0.1);
  --night-text: #ecedea;
  --night-accent: #818cf8;
  --serif: "Literata", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --gutter: 16px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1111;
    --surface: #171a1a;
    --text: #ecedea;
    --muted: #bbbcb9;
    --subtle: #9d9f9d;
    --line: #2b2c2c;
    --accent: #818cf8;
    --accent-text: #a5b4fc;
    --accent-soft: rgba(129, 140, 248, 0.16);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font: 400 17px/1.65 var(--sans);
}
a {
  color: var(--accent-text);
  text-underline-offset: 3px;
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.pg-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 12px max(var(--gutter), calc((100% - 1040px) / 2));
  background: var(--ink);
  color: var(--night-text);
}
.pg-brand img {
  display: block;
  height: 30px;
  width: auto;
}
.pg-nav {
  display: flex;
  gap: 16px;
  margin-right: auto;
  font-size: 15px;
}
.pg-nav a,
.pg-langs a {
  color: var(--night-text);
  text-decoration: none;
  opacity: 0.8;
}
.pg-nav a:hover,
.pg-langs a:hover {
  opacity: 1;
}
.pg-langs {
  display: flex;
  gap: 10px;
  font: 500 13px/1 var(--mono);
}
.pg-langs a[aria-current="true"] {
  color: var(--night-accent);
  opacity: 1;
}
.pg-start {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--night-accent);
  color: var(--ink);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}
.pg-start:hover {
  filter: brightness(1.08);
}

.pg-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px var(--gutter) 24px;
}
.pg-head,
.pg-article > h1 {
  margin-bottom: 8px;
}
h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h1 {
  margin: 0 0 12px;
  font-size: clamp(32px, 7vw, 48px);
}
.pg-article h2 {
  margin: 40px 0 12px;
  font-size: clamp(24px, 5vw, 30px);
}
.pg-article h3 {
  margin: 28px 0 8px;
  font-size: 20px;
}
.pg-lede {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.55;
}
.pg-crumbs,
.pg-date {
  margin: 0 0 10px;
  color: var(--subtle);
  font: 500 13px/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.pg-crumbs a {
  color: var(--accent-text);
  text-decoration: none;
}
.pg-article p,
.pg-article li {
  max-width: 68ch;
}
.pg-article ul,
.pg-article ol {
  padding-left: 1.3em;
}
.pg-article li + li {
  margin-top: 6px;
}
.pg-article blockquote {
  margin: 24px 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-family: var(--serif);
  font-style: italic;
}
.pg-article table {
  width: 100%;
  margin: 20px 0;
  border-collapse: collapse;
  font-size: 15px;
  display: block;
  overflow-x: auto;
}
.pg-article th,
.pg-article td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.pg-article th {
  font-weight: 600;
}
.pg-article code {
  font-family: var(--mono);
  font-size: 0.9em;
}

.pg-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.pg-list a {
  display: block;
  padding: 20px 22px;
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(20, 23, 22, 0.04),
    0 8px 24px -16px rgba(20, 23, 22, 0.25);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
.pg-list a:hover {
  transform: translateY(-2px);
}
.pg-list h2 {
  margin: 0 0 6px;
  font-size: 22px;
}
.pg-list p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}
.pg-list span {
  color: var(--accent-text);
  font-weight: 600;
  font-size: 14px;
}

.pg-faq {
  border-top: 1px solid var(--line);
}
.pg-faq details {
  border-bottom: 1px solid var(--line);
}
.pg-faq summary {
  position: relative;
  padding: 18px 40px 18px 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  cursor: pointer;
  list-style: none;
}
.pg-faq summary::-webkit-details-marker {
  display: none;
}
.pg-faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  translate: 0 -50%;
  color: var(--accent-text);
  font: 400 24px/1 var(--mono);
}
.pg-faq details[open] summary::after {
  content: "−";
}
.pg-faq details p {
  margin: 0 0 18px;
  color: var(--muted);
}

.pg-cta {
  margin: 56px 0 24px;
  padding: 32px 24px;
  border-radius: 20px;
  background: radial-gradient(
      60% 80% at 80% 20%,
      rgba(129, 140, 248, 0.28),
      transparent 70%
    ),
    var(--ink);
  color: var(--night-text);
  text-align: center;
}
.pg-cta h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 5vw, 32px);
}
.pg-cta p {
  margin: 0 0 20px;
  color: #bbbcb9;
}

.pg-foot {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px var(--gutter) 40px;
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 14px;
}
.pg-foot p {
  margin: 4px 0;
}
.pg-foot a {
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .pg-list a {
    transition: none;
  }
}