/* Phonetic Relay guide pages (13 Oct 2026). Same palette, type and grid as the
   homepage tool (index.html), so a guide reads as part of the same instrument. */
:root {
  --ink: #1B2027; --ink-dim: #55606B; --paper: #ECEEE6; --panel: #F9FAF5; --panel-2: #F1F2EA;
  --line: rgba(27, 32, 39, 0.14); --line-strong: rgba(27, 32, 39, 0.28);
  --accent: #C8720C; --accent-soft: rgba(200, 114, 12, 0.14); --accent-ink: #1B2027;
  --accent-2: #3E5972; --shadow: rgba(27, 32, 39, 0.10);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #ECE7DA; --ink-dim: #9AA7B0; --paper: #14171B; --panel: #1B1F24; --panel-2: #20252B;
    --line: rgba(236, 231, 218, 0.13); --line-strong: rgba(236, 231, 218, 0.26);
    --accent: #F2A93B; --accent-soft: rgba(242, 169, 59, 0.16); --accent-ink: #14171B;
    --accent-2: #86A6BE; --shadow: rgba(0, 0, 0, 0.35);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 12%, var(--accent-soft), transparent 42%),
    repeating-linear-gradient(0deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 96px),
    repeating-linear-gradient(90deg, var(--line) 0px, var(--line) 1px, transparent 1px, transparent 96px),
    var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  min-height: 100vh;
  padding: clamp(20px, 5vw, 64px) 16px 64px;
  display: flex; justify-content: center;
  line-height: 1.6;
}
.sheet { width: 100%; max-width: 760px; }
.brand {
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink);
  font-family: 'Big Shoulders Stencil Text', 'IBM Plex Sans', sans-serif; font-weight: 800;
  font-size: 1.15rem; text-transform: uppercase; letter-spacing: 0.02em;
}
.brand img { width: 26px; height: 26px; border-radius: 6px; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 26px; flex-wrap: wrap; }
.topbar nav a { white-space: nowrap; font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem; letter-spacing: 0.06em; color: var(--ink-dim); text-decoration: none; margin-left: 14px; }
.topbar nav a:hover, .topbar nav a[aria-current] { color: var(--accent); }
.eyebrow { font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); font-weight: 600; margin: 0; }
h1 {
  font-family: 'Big Shoulders Stencil Text', 'IBM Plex Sans', sans-serif; font-weight: 800;
  font-size: clamp(2.1rem, 7vw, 3.1rem); letter-spacing: 0.01em; text-transform: uppercase;
  margin: 4px 0 0; line-height: 0.98; text-wrap: balance;
}
h2 { font-size: 1.3rem; margin: 34px 0 10px; line-height: 1.25; }
h3 { font-size: 1.02rem; margin: 22px 0 6px; }
p, li { color: var(--ink); }
.lede { font-size: 1.02rem; color: var(--ink-dim); max-width: 60ch; margin: 12px 0 0; }
.band {
  height: 3px; opacity: 0.55; margin: 20px 0 26px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent) 40%, transparent 40%, transparent 52%, var(--accent) 52%, var(--accent) 100%);
}
a { color: var(--accent-2); }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 12px 32px -18px var(--shadow); padding: 18px; }
.cta {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 14px; padding: 11px 18px; border-radius: 10px;
  background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; border: 0; cursor: pointer; font: inherit;
}
.cta:hover { filter: brightness(1.06); }
.btn { border: 1px solid var(--line-strong); background: var(--panel-2); color: var(--ink); border-radius: 8px; padding: 6px 10px; font: inherit; font-size: 0.85rem; cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.table-wrap { overflow-x: auto; margin: 10px 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim); background: var(--panel-2); }
tr:last-child td { border-bottom: 0; }
td.big { font-family: 'IBM Plex Mono', monospace; font-weight: 600; font-size: 1.05rem; }
td.code { font-family: 'IBM Plex Mono', monospace; letter-spacing: 0.12em; }
.mono { font-family: 'IBM Plex Mono', monospace; }
.note { font-size: 0.85rem; color: var(--ink-dim); }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
details { border-bottom: 1px solid var(--line); padding: 12px 0; }
summary { font-weight: 600; cursor: pointer; }
details p { margin: 8px 0 0; color: var(--ink-dim); }
.related { margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--line); }
.related ul { list-style: none; padding: 0; margin: 8px 0 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 8px; }
.related a { display: block; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); text-decoration: none; color: var(--ink); }
.related a:hover { border-color: var(--accent); }
footer { text-align: center; font-size: 0.78rem; color: var(--ink-dim); margin-top: 34px; font-family: 'IBM Plex Mono', monospace; }
footer a { color: inherit; }
input, select { font: inherit; color: var(--ink); background: var(--panel-2); border: 1px solid var(--line-strong); border-radius: 8px; padding: 9px 11px; }
input:focus-visible, select:focus-visible, :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.result { font-family: 'IBM Plex Mono', monospace; font-size: clamp(1.6rem, 6vw, 2.3rem); font-weight: 600; margin: 10px 0 2px; letter-spacing: 0.04em; }
@media (max-width: 520px) { .topbar nav a { margin: 0 12px 0 0; } th, td { padding: 8px 9px; } }