/* ============ monochrome ============ */

:root {
  --bg: #000;
  --card: #0a0a0a;
  --line: #1e1e1e;
  --line-hover: #3a3a3a;
  --fg: #f2f2f2;
  --muted: #8b8b8b;
  --dim: #5c5c5c;
  --radius: 14px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica,
    Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 34px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--card);
  display: grid;
  place-items: center;
  color: var(--fg);
  flex: 0 0 auto;
}

.brand-mark svg { width: 20px; height: 20px; }

.brand-name {
  font-size: 21px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.btn {
  border: 1px solid var(--fg);
  background: var(--fg);
  color: #000;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 999px;
  white-space: nowrap;
  transition: opacity 0.15s ease;
}

.btn:hover { opacity: 0.82; }

.back {
  text-decoration: none;
  color: var(--muted);
  font-size: 15px;
  transition: color 0.15s ease;
}

.back:hover { color: var(--fg); }

.chev-l { margin-right: 2px; }

.tag-muted { color: var(--dim); font-size: 13px; }

/* ---------- intro ---------- */
.lede {
  color: var(--muted);
  font-size: 16px;
  max-width: 60ch;
  margin: 0 0 46px;
}

.page-title {
  font-size: clamp(2rem, 6vw, 2.7rem);
  font-weight: 680;
  letter-spacing: -0.025em;
  margin: 0 0 10px;
}

.page-lede {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 34px;
  max-width: 60ch;
}

.prose { max-width: 62ch; margin-bottom: 8px; }
.prose p { color: var(--muted); margin: 0 0 16px; }

/* ---------- section label ---------- */
.section-label {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 44px 0 16px;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--fg);
  flex: 0 0 auto;
}

/* ---------- card grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  text-decoration: none;
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.card:hover {
  border-color: var(--line-hover);
  transform: translateY(-2px);
}

.card-icon {
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--fg);
}

.card-icon svg { width: 22px; height: 22px; }

.card-body h3 {
  margin: 2px 0 6px;
  font-size: 17px;
  font-weight: 640;
  letter-spacing: -0.01em;
}

.card-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.55;
}

.chev, .ext { color: var(--dim); font-weight: 400; }
.card:hover .chev, .card:hover .ext { color: var(--fg); }

/* ---------- rating scale ---------- */
.scale { display: flex; flex-direction: column; gap: 2px; }

.scale-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.scale-row:last-child { border-bottom: none; }

.sw {
  flex: 0 0 auto;
  width: 42px;
  text-align: center;
  padding: 5px 0;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 700;
  color: #000;
}

.sw.s1  { background: #ffffff; }
.sw.s2  { background: #cfcfcf; }
.sw.s25 { background: repeating-linear-gradient(45deg, #cfcfcf 0 5px, #8b8b8b 5px 10px); }
.sw.s3  { background: #8b8b8b; }
.sw.s4  { background: #4f4f4f; color: #fff; }
.sw.s5  { background: #1c1c1c; color: #fff; box-shadow: inset 0 0 0 1px #3a3a3a; }

.sw-name { flex: 0 0 auto; min-width: 104px; font-weight: 570; }
.sw-desc { color: var(--muted); font-size: 14.5px; }

/* ---------- features ---------- */
.features { margin: 0; display: flex; flex-direction: column; gap: 20px; }
.features dt { font-weight: 620; margin-bottom: 3px; }
.features dd {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 68ch;
}

/* ---------- chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 13px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- footer ---------- */
footer {
  margin-top: 64px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 13.5px;
}

footer a { color: var(--muted); text-decoration: none; }
footer a:hover { color: var(--fg); }
.sep { margin: 0 8px; }

@media (max-width: 520px) {
  .wrap { padding: 28px 18px 60px; }
  .scale-row { flex-wrap: wrap; gap: 10px; }
  .sw-name { min-width: 0; }
  .sw-desc { flex-basis: 100%; padding-left: 56px; }
}