/* NitsBridge project page.
   Hand-built, no frameworks, no JavaScript. One theme (dark), one accent (amber). */

@font-face {
  font-family: "Space Grotesk";
  src: url("fonts/space-grotesk-var.woff2") format("woff2");
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

:root {
  --bg: #0c0f16;
  --surface: #12161f;
  --surface-2: #171c28;
  --line: #262e3f;
  --line-soft: #1b212d;
  --text: #e8ebf1;
  --text-dim: #9aa3b2;
  --text-faint: #7a8494;
  --accent: #f0a63c;
  --accent-ink: #1d1305;
  --accent-soft: rgba(240, 166, 60, 0.13);
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Space Grotesk", -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius-panel: 12px;
  --radius-control: 8px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--accent-ink);
  font: 500 0.85rem var(--mono);
  border-radius: var(--radius-control);
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip:focus { top: 12px; }

.container {
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 48px);
}

/* ============ nav ============ */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
  padding-inline: clamp(20px, 5vw, 48px);
  background: rgba(12, 15, 22, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark {
  width: 26px;
  height: 26px;
  display: block;
}

.nav-links {
  display: flex;
  gap: 26px;
  margin-left: auto;
}
.nav-links a {
  font: 500 0.8rem var(--mono);
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 2px;
}
.nav-links a:hover { color: var(--text); }

.nav-cta { margin-left: 4px; }

/* ============ buttons ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-control);
  font: 600 0.92rem var(--sans);
  letter-spacing: 0.005em;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { background: #f6b458; }

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--text-faint); }

.btn-small {
  padding: 7px 14px;
  font-size: 0.82rem;
}

/* ============ hero ============ */

.hero {
  padding: clamp(4.5rem, 11vw, 8rem) 0 clamp(3.5rem, 8vw, 6rem);
}

.eyebrow {
  margin: 0 0 22px;
  font: 500 0.72rem var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 22px;
  max-width: 16ch;
  font-size: clamp(2.3rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.lede {
  margin: 0 0 34px;
  max-width: 46ch;
  font-size: 1.14rem;
  line-height: 1.65;
  color: var(--text-dim);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ============ sections ============ */

.section {
  border-top: 1px solid var(--line-soft);
  padding: clamp(3.8rem, 8vw, 6rem) 0;
  scroll-margin-top: 72px;
}

.sec-label {
  margin: 0 0 14px;
  font: 500 0.76rem var(--mono);
  letter-spacing: 0.09em;
  color: var(--accent);
}

.section h2 {
  margin: 0 0 18px;
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.12;
  text-wrap: balance;
}

.section-intro {
  margin: 0 0 40px;
  max-width: 56ch;
  color: var(--text-dim);
  font-size: 1.04rem;
}

/* ============ why ============ */

.why .prose {
  max-width: 66ch;
}
.why .lead {
  font-size: clamp(1.15rem, 1.9vw, 1.38rem);
  line-height: 1.6;
  color: var(--text);
  margin: 0 0 1.4em;
}
.why p {
  margin: 0 0 1.3em;
  color: var(--text-dim);
}
.why .lead + p, .why p + p { color: var(--text-dim); }

/* ============ pipeline stages ============ */

.stages {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 760px;
}
.stages li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  column-gap: 6px;
}
.stage-num {
  font: 500 0.82rem/2 var(--mono);
  color: var(--accent);
  text-align: right;
  padding-right: 14px;
}
.stage-body {
  position: relative;
  border-left: 1px solid var(--line);
  padding: 2px 0 2.4rem 26px;
}
.stages li:last-child .stage-body { padding-bottom: 0; }
.stage-body::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.stage-body h3 {
  margin: 0 0 6px;
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: -0.005em;
}
.stage-body p {
  margin: 0 0 10px;
  color: var(--text-dim);
  max-width: 58ch;
}
.stage-ref {
  display: inline-block;
  font: 400 0.72rem var(--mono);
  color: var(--text-faint);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 3px 9px;
}

/* ============ roadmap ============ */

.layers {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
}
.layer {
  display: grid;
  grid-template-columns: 130px 250px minmax(0, 1fr);
  gap: 24px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-soft);
}
.layer:last-child { border-bottom: none; }
.layer h3 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.layer p {
  margin: 0;
  color: var(--text-dim);
  max-width: 52ch;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font: 500 0.74rem var(--mono);
  letter-spacing: 0.1em;
}
.status i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}
.status-now { color: var(--accent); }
.status-now i { background: var(--accent); }
.status-next { color: var(--text-dim); }
.status-next i { border: 1.5px solid var(--accent); background: transparent; }
.status-later { color: var(--text-faint); }
.status-later i { background: var(--line); }

.reverse {
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-panel);
  background: var(--surface);
  padding: 26px 30px;
  max-width: 760px;
}
.reverse h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  font-weight: 600;
}
.reverse p {
  margin: 0;
  color: var(--text-dim);
  max-width: 62ch;
}

/* ============ faq ============ */

.qa-list {
  max-width: 760px;
  border-bottom: 1px solid var(--line-soft);
}
.qa {
  padding: 24px 0;
  border-top: 1px solid var(--line-soft);
}
.qa h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 600;
}
.qa p {
  margin: 0;
  color: var(--text-dim);
  max-width: 64ch;
}
.qa code {
  font: 400 0.85em var(--mono);
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 1px 6px;
}

/* ============ join ============ */

.join .container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
.join-copy .section-intro { margin-bottom: 32px; }

.join-code {
  display: grid;
  gap: 18px;
}
.code-block {
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-panel);
  overflow: hidden;
}
.code-label {
  display: block;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line-soft);
  font: 500 0.7rem var(--mono);
  letter-spacing: 0.09em;
  color: var(--text-faint);
}
.code-block pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
}
.code-block code {
  font: 400 0.8rem/1.75 var(--mono);
  color: var(--text);
}

/* ============ footer ============ */

.footer {
  border-top: 1px solid var(--line-soft);
  padding: 34px 0 44px;
}
.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px 40px;
}
.foot-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}
.foot-note {
  margin: 0;
  font: 400 0.74rem/1.6 var(--mono);
  color: var(--text-faint);
  max-width: 52ch;
}
.foot-links {
  margin-left: auto;
  display: flex;
  gap: 22px;
}
.foot-links a {
  font: 500 0.78rem var(--mono);
  color: var(--text-dim);
  text-decoration: none;
}
.foot-links a:hover { color: var(--text); }

/* ============ responsive ============ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media (max-width: 980px) {
  .join .container { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 110px minmax(0, 1fr); }
  .layer p { grid-column: 2; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-cta { margin-left: auto; }
  .stage-num { display: none; }
  .stages li { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 1fr; gap: 10px; }
  .layer p { grid-column: auto; }
  .foot-links { margin-left: 0; }
}