/* ==========================================================================
   n1athlete — v1
   Palette : bone paper, ink, spruce, amber
   Type    : IBM Plex Sans / Sans Condensed / Mono (self-hosted, latin subset)
   ========================================================================== */

@font-face {
  font-family: "Plex Sans";
  src: url("fonts/plex-sans-400.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plex Sans";
  src: url("fonts/plex-sans-600.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plex Cond";
  src: url("fonts/plex-cond-700.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/plex-mono-400.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/plex-mono-500.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}

:root {
  --ink:     #101815;
  --ink-2:   #3f4b46;
  --ink-3:   #6b7772;
  --paper:   #eceee8;
  --paper-2: #f7f8f4;
  --spruce:  #1f5a4a;
  --amber:   #d99b16;
  --rule:    rgba(16, 24, 21, .14);
  --rule-2:  rgba(16, 24, 21, .07);

  --sans: "Plex Sans", system-ui, -apple-system, sans-serif;
  --cond: "Plex Cond", "Plex Sans", system-ui, sans-serif;
  --mono: "Plex Mono", ui-monospace, "SF Mono", monospace;

  --shell: 1080px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--rule-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule-2) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

.shell { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 28px; }

a { color: var(--spruce); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 2px solid var(--spruce); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: #fff; padding: 10px 16px; z-index: 100;
  font-family: var(--mono); font-size: 13px;
}
.skip:focus { left: 8px; top: 8px; color: #fff; }

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

.eyebrow {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-3); margin: 0 0 14px;
}

h1, h2, h3 {
  font-family: var(--cond); font-weight: 700;
  letter-spacing: -.015em; line-height: 1.06; margin: 0;
}
h1 { font-size: clamp(40px, 6.8vw, 78px); text-transform: uppercase; }
h2 { font-size: clamp(27px, 3.8vw, 40px); }
h3 { font-size: 20px; letter-spacing: 0; line-height: 1.25; }

p { margin: 0 0 18px; }
p.lead { font-size: clamp(18px, 2.1vw, 21px); color: var(--ink-2); max-width: 60ch; }
p:last-child { margin-bottom: 0; }

/* ---------- masthead ---------- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: rgba(247, 248, 244, .86);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 10;
}
.masthead .shell {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 62px;
}
.wordmark {
  font-family: var(--cond); font-weight: 700; font-size: 21px;
  letter-spacing: -.01em; color: var(--ink); text-decoration: none;
}
.wordmark span { color: var(--spruce); }
.masthead nav {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .06em;
  text-transform: uppercase; display: flex; gap: 20px;
}
.masthead nav a { color: var(--ink-2); text-decoration: none; }
.masthead nav a:hover, .masthead nav a[aria-current="page"] { color: var(--spruce); }
.masthead nav a[aria-current="page"] { text-decoration: underline; }

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

.hero { padding: 76px 0 44px; }
.hero h1 { max-width: 15ch; }
.hero .lead { margin-top: 26px; }

.hero-meta {
  display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 30px;
  font-family: var(--mono); font-size: 13px; color: var(--ink-2);
}
.hero-meta b { color: var(--ink); font-weight: 500; }

/* ---------- signature A: the method record (home) ---------- */

.record {
  margin: 48px 0 8px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
}
.record-head {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-3);
  padding: 12px 20px; border-bottom: 1px solid var(--rule);
  display: flex; justify-content: space-between; gap: 16px;
}
.record-row {
  display: grid; grid-template-columns: 130px 1fr;
  border-bottom: 1px solid var(--rule-2);
}
.record-row:last-child { border-bottom: 0; }
.record-key {
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--spruce);
  padding: 16px 20px; border-right: 1px solid var(--rule-2);
}
.record-val { padding: 16px 20px; font-size: 16px; color: var(--ink-2); }
.record-val b { color: var(--ink); font-weight: 600; }

/* ---------- signature B: the T-minus trace (product) ---------- */

.trace {
  margin: 46px 0 8px;
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  padding: 26px 0 20px; overflow-x: auto;
}
.trace svg { display: block; width: 100%; min-width: 620px; height: auto; }
.trace-line {
  fill: none; stroke: var(--amber); stroke-width: 2.5;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 1400; stroke-dashoffset: 1400;
  animation: draw 2.1s cubic-bezier(.2, .7, .3, 1) .25s forwards;
}
@keyframes draw { to { stroke-dashoffset: 0; } }
.trace-grid  { stroke: var(--rule); stroke-width: 1; }
.trace-tick  { font-family: var(--mono); font-size: 12px; fill: var(--ink); letter-spacing: .05em; }
.trace-label { font-family: var(--mono); font-size: 11px; fill: var(--ink-3); }
.trace-dot   { fill: var(--spruce); }
@media (prefers-reduced-motion: reduce) {
  .trace-line { animation: none; stroke-dashoffset: 0; }
}

/* ---------- sections ---------- */

section { padding: 54px 0; border-top: 1px solid var(--rule); }
section.open { border-top: 0; }
.section-head { margin-bottom: 30px; }

.cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.card {
  background: var(--paper-2); border: 1px solid var(--rule); padding: 24px;
}
.card .num {
  font-family: var(--mono); font-size: 12px; color: var(--spruce);
  letter-spacing: .1em; display: block; margin-bottom: 10px;
}
.card h3 { margin-bottom: 8px; }
.card p { font-size: 15.5px; color: var(--ink-2); margin: 0; }

/* ---------- protocol library item (home) ---------- */

.protocol {
  display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: end;
  background: var(--paper-2); border: 1px solid var(--rule);
  border-left: 4px solid var(--amber);
  padding: 30px 30px 28px;
}
.protocol .idx {
  font-family: var(--mono); font-size: 12px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-3); margin: 0 0 10px;
}
.protocol h3 {
  font-family: var(--cond); font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -.01em; text-transform: uppercase;
}
.protocol p { margin: 12px 0 0; color: var(--ink-2); font-size: 16px; max-width: 52ch; }
.protocol .spec {
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-3);
  margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px 18px;
}
.protocol-right { text-align: right; white-space: nowrap; }
.protocol-price { font-family: var(--cond); font-size: 34px; line-height: 1; color: var(--ink); }

.forthcoming {
  margin-top: 22px; font-family: var(--mono); font-size: 13px;
  color: var(--ink-3); border-left: 4px solid var(--rule);
  padding: 6px 0 6px 22px;
}

/* ---------- entry points ---------- */

.entry { border-left: 3px solid var(--amber); padding: 4px 0 4px 20px; margin-bottom: 26px; }
.entry .tag { font-family: var(--mono); font-size: 13px; font-weight: 500; color: var(--ink); letter-spacing: .06em; }
.entry h3 { margin: 4px 0 6px; }
.entry p { margin: 0; color: var(--ink-2); font-size: 16px; }

.note {
  font-family: var(--mono); font-size: 13.5px; line-height: 1.6;
  color: var(--ink-2); background: var(--paper-2);
  border: 1px dashed var(--rule); padding: 18px 20px;
}

/* ---------- method stages ---------- */

.stage {
  display: grid; grid-template-columns: 92px 1fr; gap: 24px;
  padding: 26px 0; border-top: 1px solid var(--rule-2);
}
.stage:first-of-type { border-top: 0; padding-top: 6px; }
.stage-n { font-family: var(--cond); font-size: 40px; line-height: .9; color: var(--amber); }
.stage h3 { margin-bottom: 8px; }
.stage p { color: var(--ink-2); font-size: 16.5px; max-width: 62ch; }

/* ---------- price block ---------- */

.price-block {
  background: var(--ink); color: var(--paper-2); padding: 42px 36px;
  display: grid; grid-template-columns: 1fr auto; gap: 34px; align-items: center;
}
.price-block h2 { color: #fff; }
.price-block p { color: rgba(236, 238, 232, .78); margin: 12px 0 0; max-width: 44ch; font-size: 16px; }
.price-tag { font-family: var(--cond); font-size: 58px; line-height: 1; color: var(--amber); }
.price-sub { font-family: var(--mono); font-size: 12.5px; color: rgba(236, 238, 232, .7); letter-spacing: .05em; margin-top: 8px; }
.price-right { text-align: right; }

.buy {
  display: inline-block; margin-top: 18px;
  background: var(--amber); color: var(--ink);
  font-family: var(--cond); font-weight: 700; font-size: 19px;
  letter-spacing: .01em; text-transform: uppercase;
  padding: 14px 30px; text-decoration: none; border: 0;
}
.buy:hover { background: #fff; color: var(--ink); }
.buy.ghost { background: transparent; color: var(--ink); border: 2px solid var(--ink); }
.buy.ghost:hover { background: var(--ink); color: var(--paper-2); }

/* ---------- newsletter ---------- */

.signup {
  border: 1px solid var(--rule); background: var(--paper-2);
  padding: 32px 30px; display: grid;
  grid-template-columns: 1fr minmax(280px, 380px); gap: 34px; align-items: center;
}
.signup h3 { font-size: clamp(22px, 2.6vw, 28px); font-family: var(--cond); text-transform: uppercase; }
.signup p { margin: 12px 0 0; color: var(--ink-2); font-size: 16px; max-width: 46ch; }
.signup iframe { width: 100%; border: 1px solid var(--rule); background: #fff; display: block; }
.signup .fallback { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); margin-top: 10px; }

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

.faq details { border-bottom: 1px solid var(--rule); padding: 18px 0; }
.faq details:first-of-type { border-top: 1px solid var(--rule); }
.faq summary {
  cursor: pointer; font-family: var(--cond); font-weight: 700; font-size: 19px;
  list-style: none; display: flex; justify-content: space-between; gap: 20px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--spruce); }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { margin: 14px 0 0; color: var(--ink-2); font-size: 16px; max-width: 68ch; }

/* ---------- breadcrumb ---------- */

.crumb {
  font-family: var(--mono); font-size: 12px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-3); padding-top: 26px;
}
.crumb a { color: var(--ink-3); }
.crumb a:hover { color: var(--spruce); }

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

footer {
  border-top: 1px solid var(--rule); background: var(--paper-2);
  padding: 44px 0 56px; margin-top: 20px;
}
.foot-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 28px; }
footer h4 {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 500; margin: 0 0 12px;
}
footer ul { list-style: none; margin: 0; padding: 0; }
footer li { margin-bottom: 7px; font-size: 15px; }
.colophon {
  margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); line-height: 1.7;
}

/* ---------- legal + 404 ---------- */

.legal { padding: 60px 0 20px; max-width: 74ch; }
.legal h1 { font-size: clamp(32px, 4.6vw, 50px); margin-bottom: 8px; }
.legal h2 { font-size: 23px; margin: 40px 0 12px; }
.legal p, .legal li { color: var(--ink-2); font-size: 16.5px; }
.legal ul { padding-left: 20px; }
.legal li { margin-bottom: 8px; }
.legal .updated {
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-3);
  letter-spacing: .05em; text-transform: uppercase; margin-bottom: 34px;
}

.notfound { padding: 110px 0 90px; }
.notfound .code {
  font-family: var(--mono); font-size: 13px; letter-spacing: .16em;
  color: var(--amber); text-transform: uppercase; margin-bottom: 16px;
}

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

@media (max-width: 780px) {
  .signup { grid-template-columns: 1fr; gap: 24px; }
  .protocol { grid-template-columns: 1fr; align-items: start; gap: 22px; }
  .protocol-right { text-align: left; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .shell { padding: 0 20px; }
  .hero { padding: 50px 0 30px; }
  .price-block { grid-template-columns: 1fr; padding: 30px 24px; }
  .price-right { text-align: left; }
  .masthead nav { gap: 14px; font-size: 11.5px; }
  .record-row { grid-template-columns: 1fr; }
  .record-key { border-right: 0; padding-bottom: 0; }
  .record-val { padding-top: 6px; }
  .stage { grid-template-columns: 1fr; gap: 8px; }
  .stage-n { font-size: 30px; }
}