:root {
  --bg: #ebe4d4;
  --raise: #f7f3ea;
  --ink: #1c1915;
  --muted: #4a453c;
  --line: #d0c6b4;
  --accent: #9a3412;
  --accent-ink: #fff8f4;
  --chip: #e3dac8;
  --ok: #1d5c38;
  --warn: #7c2d12;
  --shadow: 0 12px 40px rgba(28, 25, 21, 0.08);
  --sans: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --space: 1.25rem;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #13171b;
    --raise: #1c2228;
    --ink: #f4eee4;
    --muted: #c9c0b2;
    --line: #343c44;
    --accent: #f0a04b;
    --accent-ink: #1c140c;
    --chip: #262d34;
    --ok: #9ddec0;
    --warn: #ffc7a8;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(154, 52, 18, 0.08), transparent 220px),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.55;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

.skip {
  position: absolute;
  left: 0.75rem;
  top: -4rem;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.6rem 0.9rem;
  z-index: 5;
}
.skip:focus { top: 0.75rem; }

.wrap {
  width: min(1080px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 2;
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 0.75rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1.15rem;
}

.brand svg { width: 1.7rem; height: 1.7rem; display: block; }

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.35rem;
  margin-left: auto;
}

.nav a,
.nav summary {
  color: var(--ink);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
}

.nav a[aria-current="page"] {
  background: var(--ink);
  color: var(--bg);
}

.nav details { position: relative; }
.nav summary { cursor: pointer; list-style: none; }
.nav summary::-webkit-details-marker { display: none; }
.nav details[open] summary { background: var(--chip); }

.nav details a {
  display: flex;
  border-radius: 0;
  min-height: 44px;
}

.nav details > div {
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.3rem;
  min-width: 14rem;
}

@media (max-width: 720px) {
  .nav { margin-left: 0; width: 100%; }
  .nav details > div { position: static; }
}

@media (min-width: 721px) {
  .nav details > div {
    position: absolute;
    top: calc(100% + 0.25rem);
    left: 0;
    box-shadow: var(--shadow);
  }
}

main { padding: 1.5rem 0 3rem; }

.kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.4rem;
}

h1, h2, h3 {
  font-family: var(--serif);
  line-height: 1.15;
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 6vw, 3.4rem); margin: 0 0 0.75rem; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 2rem 0 0.6rem; }
h3 { font-size: 1.2rem; margin: 1.4rem 0 0.4rem; }

.lede { font-size: 1.15rem; max-width: 42rem; }

.hero { margin-bottom: 1.25rem; }

.panel {
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1rem;
}

.panel.ticket { border-top: 6px solid var(--accent); }

.chat-log {
  min-height: 8rem;
  max-height: 28rem;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 0.25rem;
}

.bubble {
  margin: 0;
  padding: 0.75rem 0.9rem;
  border-radius: 14px;
  max-width: 46rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.bubble.user {
  align-self: flex-end;
  background: var(--accent);
  color: var(--accent-ink);
}

.bubble.assistant,
.bubble.welcome {
  align-self: flex-start;
  background: var(--chip);
  color: var(--ink);
}

.bubble.note {
  align-self: stretch;
  background: transparent;
  border: 1px dashed var(--line);
  color: var(--muted);
}

.bubble a { color: inherit; }

.starters {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.9rem 0;
}

@media (min-width: 800px) {
  .starters { display: grid; grid-template-columns: 1fr 1fr; }
}

.starters button,
.button,
button,
.nav summary {
  font: inherit;
}

.starters button,
.button,
button[type="submit"] {
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--ink);
  text-align: left;
  padding: 0.55rem 0.8rem;
  cursor: pointer;
}

button[type="submit"],
.button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
  font-weight: 600;
}

button:disabled { opacity: 0.6; cursor: progress; }

.composer { display: grid; gap: 0.55rem; }
.composer label { font-weight: 600; }
textarea, input, select {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.75rem;
  min-height: 44px;
}
textarea { min-height: 6.5rem; resize: vertical; }

.hint { color: var(--muted); font-size: 0.92rem; margin: 0.2rem 0 0; }
.composer-row { display: flex; justify-content: space-between; gap: 0.75rem; align-items: center; }
.composer-row button { min-width: 7rem; text-align: center; }

.grid {
  display: grid;
  gap: 0.8rem;
}
@media (min-width: 800px) {
  .grid.three { grid-template-columns: repeat(3, 1fr); }
  .grid.two { grid-template-columns: 1fr 1fr; }
}

.card {
  display: block;
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem;
  color: inherit;
  text-decoration: none;
}
.card strong { display: block; font-family: var(--serif); font-size: 1.25rem; margin-bottom: 0.3rem; }
.card:hover { border-color: var(--accent); }

.callout {
  border-left: 4px solid var(--accent);
  background: var(--chip);
  padding: 0.8rem 1rem;
  border-radius: 0 12px 12px 0;
  margin: 1.2rem 0;
}

.table-wrap { overflow-x: auto; margin: 0.8rem 0 1.2rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; font-variant-numeric: tabular-nums; }
caption {
  text-align: left;
  font-weight: 600;
  margin-bottom: 0.4rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

pre, code { font-family: var(--mono); }
pre {
  background: #1c1915;
  color: #f4eee4;
  padding: 1rem;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.45;
}
@media (prefers-color-scheme: dark) {
  pre { background: #0d1013; border: 1px solid var(--line); }
}

.tool {
  display: grid;
  gap: 0.8rem;
  margin: 1rem 0;
}
@media (min-width: 800px) {
  .tool.fields { grid-template-columns: repeat(2, 1fr); }
  .tool .wide { grid-column: 1 / -1; }
}
.tool label { display: grid; gap: 0.3rem; font-weight: 600; }
.result {
  background: var(--raise);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 1rem;
}
.result dl { display: grid; grid-template-columns: 9rem 1fr; gap: 0.3rem 0.8rem; margin: 0; }
.result dt { color: var(--muted); }
.result dd { margin: 0; font-variant-numeric: tabular-nums; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
}
.site-footer .wrap { display: grid; gap: 0.7rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.75rem 1.1rem; }
.footer-links a { min-height: 44px; display: inline-flex; align-items: center; }

.noscript {
  background: var(--chip);
  padding: 0.7rem 0.9rem;
  border-radius: 12px;
}

.formula { font-family: var(--mono); font-size: 0.92rem; }