/* Layout: one narrow log. A thin rail runs down the page; each entry hangs a moon phase on it.
   The phase is the memory tier luamemo itself uses (0 new moon ... 3 full moon). */
:root {
  --bg: #eef1f5;        /* day: cool grey, leaning blue */
  --fg: #14202e;        /* ink */
  --muted: #55637a;     /* dates, labels */
  --rule: #c9d2de;      /* rail and dividers */
  --moon: #1c2b40;      /* lit side of the moon */
  --accent: #36528f;    /* links, focus */
  --chip-bg: #e1e7ef;
  --font-display: "Young Serif", Georgia, "Times New Roman", serif;
  --font-body: "Literata", Georgia, "Times New Roman", serif;
  --font-mono: "DM Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1420; --fg: #e3e9f2; --muted: #93a0b6; --rule: #25324a;
    --moon: #e8eef8; --accent: #9db5ea; --chip-bg: #18233a; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1420; --fg: #e3e9f2; --muted: #93a0b6; --rule: #25324a;
  --moon: #e8eef8; --accent: #9db5ea; --chip-bg: #18233a; color-scheme: dark;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  padding-block: 3rem 4rem;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.page { max-width: 52rem; margin-inline: auto; }
a { color: var(--accent); text-underline-offset: 0.2em; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
code { font-family: var(--font-mono); font-size: 0.86em; background: var(--chip-bg); padding: 0.1em 0.35em; border-radius: 3px; }

.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* masthead */
.masthead { display: grid; gap: 1rem; padding-bottom: 1.75rem; }
.brand { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; }
.brand svg { width: 2.4rem; height: 2.4rem; color: var(--moon); flex: none; }
.brand h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 7vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.01em;
  margin: 0;
}
.brand .label { align-self: flex-end; padding-bottom: 0.35rem; }
.tagline { margin: 0; max-width: 34rem; font-size: 1.1875rem; text-wrap: balance; }
.stack { margin: 0; }

/* tabs: the selected one gets a full moon, an accent underline, a tinted ground and heavier type */
.tabbar { border-bottom: 1px solid var(--rule); overflow-x: auto; }
.tablist { display: flex; gap: 0.25rem; min-width: max-content; }
.tab {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.02em;
  color: var(--muted); background: none; border: 0; border-bottom: 3px solid transparent;
  margin-bottom: -1px; padding: 0.85rem 0.9rem 0.75rem; cursor: pointer; white-space: nowrap;
}
.tab svg { width: 0.95rem; height: 0.95rem; flex: none; color: var(--moon); }
.tab .on { display: none; }
.tab:hover { color: var(--fg); }
.tab:focus-visible { outline-offset: -4px; }
.tab[aria-selected="true"] { color: var(--fg); font-weight: 500; background: var(--chip-bg); border-bottom-color: var(--accent); }
.tab[aria-selected="true"] .on { display: block; }
.tab[aria-selected="true"] .off { display: none; }
.panel > .sec:last-child { border-bottom: 0; }
#panel-about .lede { color: var(--fg); font-size: 1.15rem; }
@media (max-width: 30rem) {
  .tablist { gap: 0; }
  .tab { padding: 0.8rem 0.6rem 0.7rem; gap: 0.4rem; font-size: 0.78rem; }
  .tab .off { display: none; }
}

/* about */
.prose { margin: 0; max-width: 40rem; }
.sub-h { margin: 0; font-family: var(--font-display); font-weight: 400; font-size: 1.3rem; line-height: 1.3; }
.def { list-style: none; margin: 0; padding: 0; }
.def li { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: 0.2rem 1.5rem; padding-block: 0.8rem; border-top: 1px solid var(--rule); }
.def b { font-family: var(--font-mono); font-weight: 500; font-size: 0.85rem; padding-top: 0.12rem; }
.def span { max-width: 36rem; }
.figs { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.75rem 2.5rem; }
.figs li { display: grid; gap: 0.3rem; align-content: start; border-top: 1px solid var(--rule); padding-top: 0.9rem; }
.figs b { font-family: var(--font-display); font-weight: 400; font-size: 1.75rem; line-height: 1.15; font-variant-numeric: tabular-nums; }
.figs span { color: var(--muted); font-size: 0.95rem; line-height: 1.5; }
@media (max-width: 40rem) {
  .def li { grid-template-columns: minmax(0, 1fr); }
  .figs { grid-template-columns: minmax(0, 1fr); }
}

/* use it, what is on */
.sec { display: grid; gap: 1.5rem; padding-block: 2.5rem; border-bottom: 1px solid var(--rule); }
.sec-h { font-family: var(--font-display); font-weight: 400; font-size: 1.85rem; line-height: 1.2; margin: 0; text-wrap: balance; }
.lede { margin: 0; max-width: 40rem; color: var(--muted); }
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.75rem; }
.step { display: grid; grid-template-columns: 2.75rem minmax(0, 1fr); }
.step .n { font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); padding-top: 0.25rem; font-variant-numeric: tabular-nums; }
.step h3 { font-family: var(--font-body); font-weight: 600; font-size: 1.0625rem; line-height: 1.4; margin: 0 0 0.45rem; }
.step p { margin: 0 0 0.75rem; max-width: 40rem; }
.step .note { color: var(--muted); font-size: 0.95rem; }
.code { position: relative; background: var(--chip-bg); border: 1px solid var(--rule); border-radius: 4px; margin: 0 0 0.75rem; max-width: 40rem; }
.code pre { margin: 0; padding: 0.8rem 4.75rem 0.8rem 1rem; overflow-x: auto; font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.65; color: var(--fg); }
.copy { position: absolute; top: 0.5rem; right: 0.5rem; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); background: var(--bg); border: 1px solid var(--rule); border-radius: 3px; padding: 0.2rem 0.55rem; cursor: pointer; }
.copy:hover { color: var(--fg); border-color: var(--muted); }
.ways { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr)); gap: 2rem 2.5rem; }
.ways > div { min-width: 0; }
.ways h3, .group h3 { display: flex; align-items: center; gap: 0.6rem; margin: 0 0 0.35rem; font-family: var(--font-display); font-weight: 400; font-size: 1.2rem; line-height: 1.3; }
.ways .sub { margin: 0 0 0.75rem; color: var(--muted); font-size: 0.92rem; }
.kv { list-style: none; margin: 0; padding: 0; }
.kv li { display: flex; flex-wrap: wrap; gap: 0.1rem 0.8rem; padding-block: 0.6rem; border-top: 1px solid var(--rule); font-size: 0.95rem; line-height: 1.5; }
.kv code { flex: none; background: none; padding: 0; color: var(--accent); font-weight: 500; }
.kv span { flex: 1 1 12rem; min-width: 0; }
.groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15.5rem), 1fr)); gap: 2.25rem 2.25rem; }
.group { min-width: 0; }
.group svg { width: 1.2rem; height: 1.2rem; color: var(--moon); flex: none; }
.group .sub { margin: 0 0 0.6rem; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.items { list-style: none; margin: 0; padding: 0; }
.items li { padding-block: 0.75rem; border-top: 1px solid var(--rule); font-size: 0.95rem; line-height: 1.5; }
.items b { display: block; font-weight: 600; }
.items span { color: var(--muted); }
.items code { color: var(--fg); }
.fine { margin: 0; max-width: 40rem; font-size: 0.95rem; color: var(--muted); }

/* how to read */
.legend { display: grid; gap: 1rem; padding-block: 1.75rem; border-bottom: 1px solid var(--rule); }
.legend p { margin: 0; max-width: 38rem; color: var(--muted); font-size: 0.97rem; }
.phases { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.6rem 1.75rem; }
.phases li { display: flex; align-items: center; gap: 0.55rem; font-family: var(--font-mono); font-size: 0.8rem; }
.phases svg { width: 1.2rem; height: 1.2rem; color: var(--moon); flex: none; }
.phases b { font-weight: 500; }
.phases span { color: var(--muted); }

/* filter */
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; padding-block: 1.25rem; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 0.4rem; }
.seg button {
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  cursor: pointer;
}
.seg button:hover { border-color: var(--muted); }
.seg button[aria-pressed="true"] { background: var(--fg); color: var(--bg); border-color: var(--fg); }
#count { margin-left: auto; }

/* log */
.log { list-style: none; margin: 0; padding: 0; }
.entry {
  display: grid;
  grid-template-columns: 8.25rem 2.75rem minmax(0, 1fr);
  grid-template-areas: "when mark body";
  padding-bottom: 2.5rem;
}
.when { grid-area: when; text-align: right; padding-top: 0.2rem; display: grid; gap: 0.15rem; align-content: start; }
.when time { font-family: var(--font-mono); font-size: 0.82rem; font-variant-numeric: tabular-nums; color: var(--fg); }
.mark { grid-area: mark; position: relative; display: flex; justify-content: center; }
.mark::before { content: ""; position: absolute; top: 0; bottom: -2.5rem; left: 50%; width: 1px; background: var(--rule); }
.entry:last-child .mark::before { bottom: 0; background: linear-gradient(var(--rule), transparent); }
.mark svg { position: relative; width: 1.35rem; height: 1.35rem; margin-top: 0.2rem; color: var(--moon); background: var(--bg); padding: 2px; box-sizing: content-box; }
.body { grid-area: body; min-width: 0; }
.body h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  line-height: 1.25;
  margin: 0 0 0.6rem;
  text-wrap: balance;
}
.body p { margin: 0 0 0.8rem; max-width: 40rem; }
.body p:last-child { margin-bottom: 0; }
.body .why { color: var(--muted); font-style: italic; }
.entry[hidden] { display: none !important; }

.next { padding-block: 1.75rem 0; border-top: 1px solid var(--rule); display: grid; gap: 0.6rem; }
.next p { margin: 0; max-width: 40rem; }
footer { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--rule); display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
footer span, footer a { font-family: var(--font-mono); font-size: 0.8rem; }

@media (max-width: 40rem) {
  body { padding-block: 2rem 3rem; }
  .entry {
    grid-template-columns: 2.25rem minmax(0, 1fr);
    grid-template-areas: "mark when" "mark body";
    column-gap: 0.25rem;
  }
  .when { text-align: left; grid-auto-flow: column; justify-content: start; align-items: baseline; gap: 0.9rem; padding-bottom: 0.3rem; }
  .body h2 { font-size: 1.3rem; }
  #count { margin-left: 0; flex-basis: 100%; }
}
@media (prefers-reduced-motion: no-preference) {
  .seg button { transition: background 0.15s, color 0.15s, border-color 0.15s; }
}