/* Layout: one left-aligned writing column whose width is drawn by a WordStar
   ruler (L----!----R) at the top; screenshots run wider than the column.
   Palette quotes WordStar 7 itself: menu-panel grey, hotkey blue,
   black title and status bars. Dark mode swaps the grey for charcoal. */
:root {
  --paper: #e4e6ea;      /* WordStar 7 menu-panel grey, lightened */
  --panel: #d3d7dd;      /* keycaps and quiet fills */
  --ink: #15171b;
  --muted: #4c525b;
  --rule: #b3b8c1;
  --hotkey: #1f3db3;     /* WordStar 7 hotkey blue */
  --hotkey-ink: #ffffff;
  --bar: #000000;        /* title and status bars */
  --bar-ink: #c9cdd4;
  --bar-hot: #9fb3ff;

  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --serif: "IBM Plex Serif", Charter, "Iowan Old Style", Georgia, serif;

  --measure: 40rem;
  --wide: 70rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1f2328;
    --panel: #2b3038;
    --ink: #e5e7ea;
    --muted: #a3a9b2;
    --rule: #3b414a;
    --hotkey: #93a9ff;
    --hotkey-ink: #0c1640;
    --bar: #000000;
    --bar-ink: #b9bec7;
    --bar-hot: #93a9ff;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #1f2328;
  --panel: #2b3038;
  --ink: #e5e7ea;
  --muted: #a3a9b2;
  --rule: #3b414a;
  --hotkey: #93a9ff;
  --hotkey-ink: #0c1640;
  --bar: #000000;
  --bar-ink: #b9bec7;
  --bar-hot: #93a9ff;
  color-scheme: dark;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--hotkey); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--hotkey); outline-offset: 3px; border-radius: 2px; }

code, kbd { font-family: var(--mono); font-size: 0.86em; }
code { background: var(--panel); padding: 0.08em 0.3em; border-radius: 3px; overflow-wrap: anywhere; }
kbd {
  display: inline-block;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 0.35em;
  line-height: 1.5;
  font-weight: 500;
}

/* One wrapper per band carries the side gutter. */
.wrap {
  max-width: var(--wide);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.column { max-width: var(--measure); }

/* Title bar */
.titlebar { background: var(--bar); color: var(--bar-ink); font-family: var(--mono); font-size: 0.875rem; }
.titlebar .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
  padding-block: 0.6rem;
}
.titlebar .name { color: var(--bar-ink); text-decoration: none; font-weight: 600; }
.titlebar nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.titlebar nav a { color: var(--bar-ink); text-decoration: none; }
.titlebar nav a:hover { color: var(--bar-hot); }

/* Hero */
.hero { padding-block: 3.5rem 1rem; }
.ruler {
  margin: 0 0 0.75rem;
  font-family: var(--mono);
  font-size: 0.9375rem;
  line-height: 1;
  letter-spacing: 0;
  color: var(--muted);
  white-space: pre;
  overflow: hidden;
}
h1 {
  margin: 0;
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(2rem, 1.25rem + 3.4vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
.cursor {
  display: inline-block;
  width: 0.55em;
  height: 0.95em;
  margin-left: 0.08em;
  vertical-align: -0.1em;
  background: var(--hotkey);
  animation: blink 1.1s steps(1, end) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .cursor { animation: none; } }

.lede { margin: 1.25rem 0 0; font-size: 1.25rem; line-height: 1.55; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.5rem; margin-top: 2rem; }
.button {
  display: inline-block;
  background: var(--hotkey);
  color: var(--hotkey-ink);
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  padding: 0.8rem 1.15rem;
  border-radius: 4px;
}
.button:hover { text-decoration: underline; text-underline-offset: 0.2em; }
.actions .plain { font-family: var(--mono); font-size: 1rem; }
.fine { margin: 1rem 0 0; font-size: 0.9375rem; color: var(--muted); }

/* Screenshots */
.shot { margin: 0; }
.shot img { border: 1px solid var(--rule); border-radius: 8px; }
.shot figcaption { margin-top: 0.6rem; font-size: 0.9375rem; color: var(--muted); max-width: var(--measure); }
.hero .shot { margin-top: 3rem; }

/* Sections */
section { padding-block: 3.5rem; }
h2 {
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
section p { margin: 0 0 1rem; }
section p:last-child { margin-bottom: 0; }

.pair { display: grid; gap: 2rem; margin-top: 2rem; }
@media (min-width: 52rem) { .pair { grid-template-columns: 1fr 1fr; align-items: start; } }
.pair > * { min-width: 0; }
.pair img { width: 100%; aspect-ratio: 1453 / 924; object-fit: cover; object-position: top left; }
.pair h3 { margin: 1rem 0 0.25rem; font-family: var(--mono); font-size: 1.0625rem; font-weight: 600; }
.pair p { font-size: 1rem; margin: 0; }

.facts { margin: 1.5rem 0 0; display: grid; gap: 0.9rem 1.5rem; }
@media (min-width: 40rem) { .facts { grid-template-columns: 7.5rem minmax(0, 1fr); } }
.facts dt { font-family: var(--mono); font-weight: 600; font-size: 1rem; padding-top: 0.12rem; }
.facts dd { margin: 0; min-width: 0; }
.gap { margin-top: 1.5rem; font-size: 1rem; color: var(--muted); }

.steps ol { margin: 1.25rem 0 1.25rem; padding-left: 1.6rem; display: grid; gap: 0.6rem; }
.steps ol li::marker { font-family: var(--mono); font-weight: 600; color: var(--hotkey); }
.steps p { margin: 0 0 0.75rem; }
.steps code { font-size: 0.82em; }

.credit { display: grid; gap: 2rem; }
@media (min-width: 52rem) { .credit { grid-template-columns: minmax(0, var(--measure)) 15rem; align-items: start; } }
.credit .shot img { border-radius: 6px; }
.aside { font-size: 0.9375rem; color: var(--muted); }

/* Status bar */
.statusbar { background: var(--bar); color: var(--bar-ink); font-family: var(--mono); font-size: 0.8125rem; line-height: 1.6; margin-top: 2rem; }
.statusbar .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 2rem; padding-block: 0.9rem; }
.statusbar p { margin: 0; }
.statusbar a { color: var(--bar-ink); }
.statusbar a:hover { color: var(--bar-hot); }