/* NKSTONE network — shared stylesheet. Tokens carry the brand; hairlines carry structure. */

:root {
  --bone: #f4f1ea;
  --bone-deep: #eae5da;
  --ink: #17191a;
  --muted: #5f5b52;
  --taupe: #8a8477;
  --hairline: #d8d2c5;
  --accent: #556537;
  --accent-hover: #3f4c27;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", Times, serif;
  --content: 1240px;
  --measure: 720px;
  --gutter: 24px;
  --sect: 96px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: var(--bone); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { width: min(var(--content), 100% - (var(--gutter) * 2)); margin-inline: auto; }
.wrap-n { width: min(var(--measure), 100% - (var(--gutter) * 2)); margin-inline: auto; }

/* --- type ---------------------------------------------------------------- */

.d-xl {
  font-size: clamp(34px, 5.2vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.028em;
  font-weight: 400;
  margin: 0;
  text-wrap: balance;
}
.lbl {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
}
.lede {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.55;
  color: var(--muted);
  max-width: 58ch;
  margin: 22px 0 0;
}

/* --- header -------------------------------------------------------------- */

.sh {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bone) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.sh-in {
  width: min(var(--content), 100% - (var(--gutter) * 2));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 68px;
}
.wm { font-size: 17px; letter-spacing: 0.16em; font-weight: 500; }
.wm sup { font-size: 9px; letter-spacing: 0; top: -0.7em; }
.sh-nav { display: flex; gap: 22px; margin-left: auto; flex-wrap: wrap; }
.sh-nav a {
  font-size: 13px;
  color: var(--muted);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
}
.sh-nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* --- buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 13px;
  letter-spacing: 0.02em;
  background: var(--ink);
  color: var(--bone);
  border: 1px solid var(--ink);
  transition: background 0.18s ease, color 0.18s ease;
}
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-sm { min-height: 38px; padding: 0 16px; font-size: 12px; flex: none; }
.btn-inv { background: var(--bone); color: var(--ink); border-color: var(--bone); }
.btn-inv:hover { background: var(--accent); border-color: var(--accent); color: var(--bone); }
.btn-ghost { background: transparent; color: var(--bone); border-color: color-mix(in srgb, var(--bone) 40%, transparent); }
.btn-ghost:hover { background: transparent; border-color: var(--bone); }

/* --- hero ---------------------------------------------------------------- */

.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(40px, 5vw, 64px); }
.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0 28px;
  margin: 44px 0 0;
  border-top: 1px solid var(--hairline);
}
.meta > div { padding: 16px 0 4px; border-bottom: 1px solid var(--hairline); }
.meta dt { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--taupe); }
.meta dd { margin: 6px 0 10px; font-size: 16px; }

/* --- answer block -------------------------------------------------------- */

.answer { padding: 0 0 clamp(40px, 5vw, 60px); }
.answer p {
  margin: 0;
  font-size: clamp(18px, 1.9vw, 22px);
  line-height: 1.5;
  padding-left: 22px;
  border-left: 2px solid var(--accent);
}

/* --- sub navigation ------------------------------------------------------ */

.sub-nav { border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); background: var(--bone-deep); }
.sub-nav .lbl { width: min(var(--measure), 100% - (var(--gutter) * 2)); margin: 0 auto; padding: 20px 0 0; }
.sub-nav ul {
  width: min(var(--measure), 100% - (var(--gutter) * 2));
  margin: 0 auto;
  padding: 4px 0 22px;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}
.sub-nav a { font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--hairline); }
.sub-nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* --- article ------------------------------------------------------------- */

.article { padding: clamp(48px, 6vw, 80px) 0 0; }
.article h2 {
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.22;
  letter-spacing: -0.015em;
  font-weight: 400;
  margin: 56px 0 16px;
  scroll-margin-top: 90px;
}
.article h2:first-child { margin-top: 0; }
.article p { margin: 0 0 18px; }
.article strong { font-weight: 500; }
.article a { border-bottom: 1px solid var(--accent); }

.bl-list { margin: 0 0 20px; padding-left: 18px; }
.bl-list li { margin-bottom: 8px; }

.pq {
  margin: 36px 0;
  padding: 4px 0 4px 24px;
  border-left: 2px solid var(--hairline);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink);
}
.pq p { margin: 0; }
.pq cite { display: block; margin-top: 10px; font-family: var(--sans); font-size: 12px; font-style: normal; color: var(--taupe); letter-spacing: 0.06em; text-transform: uppercase; }

.note {
  margin: 32px 0;
  padding: 18px 20px;
  background: var(--bone-deep);
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}

/* --- table --------------------------------------------------------------- */

.tbl-wrap { margin: 28px 0 32px; overflow-x: auto; }
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 420px; }
.tbl caption { text-align: left; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--taupe); padding-bottom: 10px; }
.tbl th, .tbl td { text-align: left; padding: 12px 14px 12px 0; border-bottom: 1px solid var(--hairline); vertical-align: top; }
.tbl th { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--taupe); font-weight: 400; border-bottom-color: var(--ink); }
.tbl tbody tr:first-child td { font-weight: 500; }

/* --- cards --------------------------------------------------------------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  margin: 32px 0 8px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}
.card { display: block; background: var(--bone); padding: 24px 22px 26px; }
.card:hover { background: var(--bone-deep); }
.card-k { display: block; font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--taupe); margin-bottom: 10px; }
.card-t { display: block; font-size: 17px; line-height: 1.3; margin-bottom: 8px; }
.card-d { display: block; font-size: 13px; line-height: 1.5; color: var(--muted); }

/* --- faq ----------------------------------------------------------------- */

.sec { padding-block: var(--sect); }
.sec-tight { padding-block: clamp(48px, 6vw, 72px) 0; border-top: 1px solid var(--hairline); margin-top: 64px; }
.sec h2 { font-size: clamp(22px, 2.4vw, 30px); font-weight: 400; margin: 0 0 24px; }
.faq { margin: 0; }
.faq-i { border-top: 1px solid var(--hairline); padding: 20px 0; }
.faq-i:last-child { border-bottom: 1px solid var(--hairline); }
.faq dt { font-size: 16px; margin-bottom: 8px; }
.faq dd { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.6; }

/* --- cta ----------------------------------------------------------------- */

.sec-ink { background: var(--ink); color: var(--bone); padding-block: clamp(56px, 7vw, 88px); }
.cta-h { font-size: clamp(24px, 3vw, 38px) !important; line-height: 1.16; font-weight: 400; margin: 0 0 16px !important; letter-spacing: -0.02em; }
.cta-p { color: color-mix(in srgb, var(--bone) 72%, transparent); max-width: 52ch; margin: 0 0 28px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* --- footer -------------------------------------------------------------- */

.sf { background: var(--bone-deep); border-top: 1px solid var(--hairline); padding: 64px 0 28px; }
.sf-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
.sf-p { font-size: 13px; color: var(--muted); max-width: 32ch; margin: 14px 0 0; }
.sf-list { list-style: none; margin: 0; padding: 0; font-size: 13px; }
.sf-list li { margin-bottom: 8px; color: var(--muted); }
.sf-list a:hover { color: var(--ink); }
.sf-ad { font-style: normal; font-size: 13px; color: var(--muted); line-height: 1.6; }
.sf-bot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--hairline);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--taupe);
}

/* --- responsive ---------------------------------------------------------- */

@media (max-width: 900px) {
  .sf-grid { grid-template-columns: 1fr 1fr; }
  .sh-in { flex-wrap: wrap; gap: 8px 14px; padding: 12px 0 10px; }
  .sh-in .btn-sm { margin-left: auto; }
  .sh-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    gap: 8px 18px;
    padding-top: 2px;
    border-top: 1px solid var(--hairline);
  }
  .sh-nav a { font-size: 12px; padding: 8px 0 2px; }
}
@media (max-width: 560px) {
  :root { --gutter: 18px; --sect: 64px; }
  .sf-grid { grid-template-columns: 1fr; gap: 28px; }
  .sh-in { min-height: 60px; }
  .answer p { padding-left: 16px; }
  .meta { margin-top: 30px; }
}