/* ==========================================================================
   Yetera · yetera.caelune.top
   Brand: Caelune

   Palette follows the app: soft mint ground, cream paper, deep blue ink.
   Letters are the system stack — no web font is loaded, so the page renders
   identically offline and nothing is requested from a third party.
   No JavaScript is required to read any page here.
   ========================================================================== */

:root {
  color-scheme: light dark;

  /* Ground: mint */
  --bg: #e9f5ee;
  --bg-deep: #dff1e7;

  /* Surfaces: cream paper */
  --surface: #fffcf5;
  --surface-soft: #f6f1e4;
  --surface-quiet: #f2f7f2;

  /* Deep blue ink */
  --ink: #1f3354;
  --ink-soft: #43526c;
  --ink-faint: #5a6981;
  --line: #2b4f8c;
  --line-soft: rgba(43, 79, 140, 0.46);
  --line-hair: rgba(43, 79, 140, 0.18);

  /* Accents, used the way the app uses them: to say *which*, never *how good* */
  --mint: #5fcb98;
  --mint-soft: #dcf3e6;
  --sun: #ffc94a;
  --sun-soft: #fff0c7;
  --sky: #5b9deb;
  --coral: #ff8a6b;

  --link: #2b4f8c;
  --focus: #2f6fd0;

  --radius: 22px;
  --radius-sm: 14px;
  --lift: 3px;
  --shadow: 0 1px 0 rgba(43, 79, 140, 0.05), 0 10px 24px -14px rgba(43, 79, 140, 0.5);

  --measure: 46rem;
  --shell: 60rem;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151d;
    --bg-deep: #0d1118;

    --surface: #1b222c;
    --surface-soft: #222b38;
    --surface-quiet: #222b38;

    --ink: #f2f0ea;
    --ink-soft: #b3bdcc;
    --ink-faint: #99a6b8;
    --line: #8fb6e8;
    --line-soft: rgba(143, 182, 232, 0.34);
    --line-hair: rgba(143, 182, 232, 0.18);

    --mint-soft: #1e3330;
    --sun-soft: #3a3324;

    --link: #a6c8f2;
    --focus: #a6c8f2;

    --shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 12px 28px -18px rgba(0, 0, 0, 0.9);
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.75;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

/* One soft mint glow at the top, so the page has a light source without
   becoming a landing-page gradient. */
body::before {
  content: "";
  position: fixed;
  inset: -30vh 0 auto 0;
  height: 70vh;
  background: radial-gradient(
    60% 60% at 50% 0%,
    color-mix(in srgb, var(--mint) 22%, transparent),
    transparent 70%
  );
  pointer-events: none;
  z-index: 0;
}

@media (prefers-color-scheme: dark) {
  body::before {
    background: radial-gradient(
      60% 60% at 50% 0%,
      rgba(95, 203, 152, 0.09),
      transparent 70%
    );
  }
}

.shell,
.site-header,
.site-footer {
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------- elements */

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface);
  color: var(--ink);
  padding: 10px 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  z-index: 10;
}

.skip:focus {
  left: 12px;
  top: 12px;
}

/* ----------------------------------------------------------------- header */

.site-header {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 22px 20px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 650;
  font-size: 19px;
  letter-spacing: 0.01em;
}

.brand-mark {
  display: block;
  width: 30px;
  height: 30px;
  border-radius: 22%;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* The language switch comes first in the markup so it can sit on its own row
   next to the wordmark on a phone; on wider screens it reads last. */
.header-right .site-nav {
  order: 1;
}

.header-right .lang-switch {
  order: 2;
}

.site-nav a,
.header-right .lang-switch {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 15px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1.5px solid transparent;
}

.site-nav a:hover,
.header-right .lang-switch:hover {
  color: var(--ink);
  border-color: var(--line-hair);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--surface);
  border-color: var(--line-soft);
}

.lang-switch {
  font-weight: 600;
  background: var(--surface);
  border-color: var(--line-soft);
  color: var(--ink);
}

.lang-switch:hover {
  border-color: var(--line);
}

/* ------------------------------------------------------------------- shell */

.shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px 20px 72px;
}

.measure {
  max-width: var(--measure);
}

/* -------------------------------------------------------------------- hero */

.hero {
  margin: 28px 0 40px;
}

.hero h1 {
  margin: 0;
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.hero .claim {
  margin: 18px 0 0;
  font-size: clamp(2rem, 7vw, 3.1rem);
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: balance;
}

.hero .claim .notyet {
  display: block;
  color: var(--ink);
}

.hero .claim .then {
  display: block;
  color: var(--ink-soft);
  font-weight: 600;
}

.hero .lede {
  margin: 22px 0 0;
  max-width: var(--measure);
  font-size: 1.12rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------------- cards */

.card {
  background: var(--surface);
  border: 1.5px solid var(--line-soft);
  border-bottom-width: calc(1.5px + var(--lift));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 26px;
}

/* ------------------------------------------------------------------- steps */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.step {
  background: var(--surface);
  border: 1.5px solid var(--line-soft);
  border-bottom-width: calc(1.5px + var(--lift));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 22px 24px;
}

.step .tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--mint-soft);
  border: 1.5px solid var(--line-soft);
  border-radius: 999px;
  padding: 3px 11px;
  margin-bottom: 14px;
}

.step:nth-child(2) .tag {
  background: var(--sun-soft);
}

.step:nth-child(3) .tag {
  background: var(--surface-quiet);
}

.step h3 {
  margin: 0 0 6px;
  font-size: 1.24rem;
  font-weight: 700;
}

.step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.7;
}

/* ------------------------------------------------------------------- prose */

.prose h2 {
  margin: 44px 0 12px;
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.prose h2:first-of-type {
  margin-top: 30px;
}

.prose h3 {
  margin: 26px 0 6px;
  font-size: 1.06rem;
  font-weight: 650;
}

.prose p,
.prose li {
  color: var(--ink-soft);
}

.prose p {
  margin: 0 0 16px;
}

.prose strong {
  color: var(--ink);
  font-weight: 650;
}

.prose ul,
.prose ol {
  margin: 0 0 16px;
  padding-left: 1.3em;
}

.prose li {
  margin-bottom: 8px;
}

.prose li::marker {
  color: var(--line);
}

.prose code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--surface-quiet);
  border: 1px solid var(--line-hair);
  border-radius: 6px;
  padding: 1px 5px;
}

.page-title {
  margin: 26px 0 6px;
  font-size: clamp(1.8rem, 5.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-sub {
  margin: 0 0 8px;
  color: var(--ink-faint);
  font-size: 0.98rem;
}

.rule {
  height: 1.5px;
  background: var(--line-hair);
  border: 0;
  margin: 26px 0 0;
}

/* --------------------------------------------------------------- callouts */

.note {
  background: var(--surface);
  border: 1.5px solid var(--line-soft);
  border-left-width: 6px;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 26px 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.note p {
  margin: 0 0 8px;
}

.note p:last-child {
  margin-bottom: 0;
}

.note .note-title {
  display: block;
  color: var(--ink);
  font-weight: 650;
  margin-bottom: 4px;
}

.note.quiet {
  background: var(--surface-quiet);
  border-left-width: 1.5px;
}

.note.preview {
  background: var(--sun-soft);
  border-color: var(--line-soft);
  color: var(--ink);
}

@media (prefers-color-scheme: dark) {
  .note.preview {
    background: #2f2a1e;
  }
}

/* -------------------------------------------------------------------- home */

.section-title {
  margin: 52px 0 16px;
  font-size: 1.32rem;
  font-weight: 700;
}

.facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.facts li {
  background: var(--surface);
  border: 1.5px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  color: var(--ink-soft);
}

.facts li strong {
  color: var(--ink);
  font-weight: 650;
}

.quiet-statement {
  margin: 52px 0 0;
  font-size: 1.24rem;
  line-height: 1.75;
  font-weight: 600;
  color: var(--ink);
  max-width: var(--measure);
  text-wrap: balance;
}

.quiet-statement .soft {
  color: var(--ink-soft);
  font-weight: 500;
}

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

.site-footer {
  border-top: 1.5px solid var(--line-hair);
  margin-top: 24px;
  background: var(--bg-deep);
}

@media (prefers-color-scheme: dark) {
  .site-footer {
    background: var(--bg-deep);
  }
}

.site-footer .inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 30px 20px 44px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: baseline;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 0.96rem;
}

.site-footer .colophon {
  color: var(--ink-faint);
  font-size: 0.9rem;
  margin: 0;
}

.site-footer .colophon a {
  color: var(--ink-soft);
}

/* ------------------------------------------------------------ small screen */

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }

  .site-header {
    padding-top: 16px;
    row-gap: 4px;
  }

  .site-nav {
    gap: 2px;
  }

  .site-nav a,
  .header-right .lang-switch {
    padding: 7px 10px;
    font-size: 14px;
  }

  /* The language switch takes the first row next to the wordmark, and the
     page links drop to a second row: on a phone the header stays two tidy
     rows instead of wrapping one stray pill. */
  .header-right {
    display: grid;
    grid-template-columns: 1fr;
    justify-items: end;
    gap: 4px;
  }

  .header-right .lang-switch {
    order: -1;
  }

  .shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  .card {
    padding: 20px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}