/* ============================================================
   NUVALABS CAMPUS — design system
   The third climate: night school. NuvaLabs is cool daylight,
   Fair Data is warm paper, Campus is the lamp-lit desk after
   lectures — deep indigo ink, periwinkle signal, chalk mono.
   Same craft family (JetBrains Mono instrumentation, hairline
   rules, pill buttons, ghost wordmark footer), third mood.

   Performance: zero WebGL, zero canvas, zero rAF loops.
   Motion = CSS transitions + IntersectionObserver reveals only.
   ============================================================ */

:root {
  --bg: #0d0f1d;
  --bg-2: #12152a;
  --panel: rgba(157, 184, 255, 0.045);
  --ink: #eceffa;
  --ink-2: #a3aad0;
  --ink-3: #666c92;
  --line: rgba(157, 184, 255, 0.14);
  --line-2: rgba(157, 184, 255, 0.28);
  --peri: #9db8ff;
  --peri-2: #c7d4ff;
  --mint: #a8e6c9;
  --disp: "Space Grotesk", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --wrap: 1240px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--disp);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--peri); color: var(--bg); }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

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

/* chalk dust grain — static SVG tile, no animation */
.cgrain {
  position: fixed; inset: 0; pointer-events: none; z-index: 90;
  opacity: 0.4; mix-blend-mode: screen;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.35 0 0 0 0 0.4 0 0 0 0 0.62 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 clamp(20px, 4vw, 48px); }
.sec { padding: clamp(80px, 11vh, 140px) 0; position: relative; }
.sec-line { border-top: 1px solid var(--line); }

/* ---------- type ---------- */
.eyebrow {
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--peri);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--peri); }
.h-hero {
  font-size: clamp(44px, 7vw, 96px); font-weight: 560; line-height: 1.0;
  letter-spacing: -0.03em;
}
.h-xl { font-size: clamp(32px, 4.6vw, 62px); font-weight: 560; line-height: 1.05; letter-spacing: -0.025em; }
.h-lg { font-size: clamp(24px, 3vw, 40px); font-weight: 560; line-height: 1.1; letter-spacing: -0.02em; }
.lead { font-size: clamp(16px, 1.5vw, 19px); color: var(--ink-2); line-height: 1.65; }
.small { font-size: 14px; color: var(--ink-2); line-height: 1.6; }
.mono { font-family: var(--mono); }
.peri { color: var(--peri); }
.u-peri { box-shadow: inset 0 -0.14em 0 rgba(157, 184, 255, 0.3); }

/* ---------- buttons ---------- */
.cbtn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 15px 26px; border-radius: 999px;
  border: 1px solid var(--ink); color: var(--ink);
  position: relative; overflow: hidden;
  transition: color 0.3s, background 0.3s, border-color 0.3s, transform 0.3s var(--ease), box-shadow 0.3s;
}
.cbtn:hover { background: var(--ink); color: var(--bg); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); }
.cbtn.solid { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.cbtn.solid:hover { background: var(--peri); border-color: var(--peri); color: #0d0f1d; }
.cbtn .arr { transition: transform 0.3s var(--ease); }
.cbtn:hover .arr { transform: translateX(4px); }

/* ---------- nav ---------- */
.cnav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.cnav.scrolled {
  background: rgba(13, 15, 29, 0.82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.cnav-in {
  max-width: var(--wrap); margin: 0 auto; padding: 0 clamp(20px, 4vw, 48px);
  height: 68px; display: flex; align-items: center; gap: 30px;
}
.clogo { display: inline-flex; align-items: center; gap: 11px; font-weight: 640; font-size: 19px; letter-spacing: -0.02em; }
.clogo em { font-style: normal; font-weight: 450; color: var(--peri); }
.cnav-links { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.cnav-links a.nl {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-2); transition: color 0.25s;
}
.cnav-links a.nl:hover { color: var(--ink); }
.cbtn.sm { padding: 10px 19px; font-size: 10.5px; }
@media (max-width: 900px) { .cnav-links a.nl { display: none; } }
@media (max-width: 560px) {
  .clogo { font-size: 16px; gap: 8px; }
  .clogo span { white-space: nowrap; }
}

/* ---------- hero ---------- */
.chero {
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: flex-end;
  overflow: hidden;
}
/* a faint desk-lamp glow, static */
.chero::before {
  content: ""; position: absolute; top: -20%; right: -10%;
  width: 60vw; height: 60vw; border-radius: 50%;
  background: radial-gradient(circle, rgba(157, 184, 255, 0.09) 0%, transparent 62%);
  pointer-events: none;
}
.chero-in {
  position: relative; z-index: 2; width: 100%;
  padding: 120px 0 clamp(30px, 5vh, 56px);
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(30px, 4vw, 70px);
  align-items: end;
}
.chero-copy { max-width: 640px; display: flex; flex-direction: column; gap: 22px; }
.chero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.chero-tag {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-3);
}
.chero-tag i { width: 6px; height: 6px; border-radius: 50%; background: var(--peri); }

/* the desk — a small stack of the three things a student gets */
.desk { position: relative; height: 430px; margin-bottom: 8px; }
.dcard {
  position: absolute; width: min(330px, 86%);
  border: 1px solid var(--line-2); border-radius: 14px;
  background: linear-gradient(160deg, #181c36 0%, #12152a 100%);
  padding: 20px 22px; display: flex; flex-direction: column; gap: 9px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  transition: transform 0.45s var(--ease), border-color 0.3s;
}
.dcard:hover { transform: translateY(-8px) rotate(0deg) !important; border-color: var(--peri); z-index: 5; }
.dcard .dk {
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--peri);
  display: flex; justify-content: space-between; gap: 8px; align-items: baseline;
}
.dcard .dk .ph { color: var(--mint); }
.dcard h4 { font-size: 18px; font-weight: 620; letter-spacing: -0.015em; line-height: 1.25; }
.dcard p { font-family: var(--mono); font-size: 11px; color: var(--ink-2); line-height: 1.7; }
.dcard .row { display: flex; justify-content: space-between; gap: 10px; font-family: var(--mono); font-size: 11px; color: var(--ink-2); border-top: 1px solid var(--line); padding-top: 8px; }
.dcard .row b { color: var(--ink); font-weight: 500; }
.dcard .row .ok { color: var(--mint); }
.d-brief { top: 4%; left: 0; transform: rotate(-4deg); z-index: 1; }
.d-pay { top: 30%; right: 0; transform: rotate(2.5deg); z-index: 2; }
.d-cert { bottom: 0; left: 7%; transform: rotate(-1.5deg); z-index: 3; }
.desk-hint {
  position: absolute; z-index: 2; right: clamp(20px, 4vw, 48px); bottom: 12px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--ink-3);
}

/* ---------- section head ---------- */
.sec-head { display: flex; flex-direction: column; gap: 16px; max-width: 760px; margin-bottom: clamp(40px, 6vh, 68px); }

/* brief cards (what you'd do) */
.briefs { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.brief {
  border: 1px solid var(--line); border-radius: 14px; padding: 24px;
  background: var(--panel);
  display: flex; flex-direction: column; gap: 10px;
  transition: transform 0.4s var(--ease), border-color 0.3s, box-shadow 0.3s;
}
.brief:hover { transform: translateY(-4px); border-color: var(--peri); box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4); }
.brief .tag {
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--peri);
}
.brief h3 { font-size: 21px; font-weight: 620; letter-spacing: -0.015em; }
.brief p { font-size: 14px; color: var(--ink-2); flex: 1; }

/* get rows (what you get) */
.grow {
  display: grid; grid-template-columns: 90px 1fr 1.2fr; gap: clamp(18px, 3vw, 48px);
  align-items: baseline; padding: clamp(24px, 4vh, 40px) 6px;
  border-top: 1px solid var(--line);
}
.grow:last-of-type { border-bottom: 1px solid var(--line); }
.grow .n { font-family: var(--mono); font-size: 12px; color: var(--ink-3); letter-spacing: 0.2em; }
.grow h3 { font-size: clamp(21px, 2.6vw, 32px); font-weight: 560; letter-spacing: -0.02em; line-height: 1.1; }
.grow p { color: var(--ink-2); font-size: 15.5px; max-width: 560px; }
.grow p b { color: var(--ink); font-weight: 600; }

/* specimen credential */
.credential {
  margin-top: clamp(30px, 5vh, 52px);
  border: 1.5px dashed var(--line-2); border-radius: 16px; padding: clamp(24px, 3vw, 34px);
  display: flex; flex-direction: column; gap: 14px;
  background: var(--panel); font-family: var(--mono);
  max-width: 680px;
}
.credential .cr-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.credential .cr-title { font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink); font-weight: 600; }
.credential .cr-ph {
  font-size: 9px; letter-spacing: 0.18em; color: var(--mint);
  border: 1px solid var(--mint); border-radius: 999px; padding: 4px 10px;
  text-transform: uppercase;
}
.credential .cr-row { display: flex; justify-content: space-between; gap: 12px; font-size: 11.5px; color: var(--ink-2); border-top: 1px solid var(--line); padding-top: 10px; }
.credential .cr-row b { color: var(--ink); font-weight: 500; }
.credential .cr-note { font-size: 10px; color: var(--ink-3); letter-spacing: 0.06em; }

/* steps (how it works) */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; background: var(--panel); }
.step { padding: 26px 22px; display: flex; flex-direction: column; gap: 8px; }
.step + .step { border-left: 1px solid var(--line); }
.step .stage { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--peri); }
.step h3 { font-size: 17px; font-weight: 620; letter-spacing: -0.01em; }
.step p { font-size: 13px; color: var(--ink-2); }
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr 1fr; }
  .step + .step { border-left: 0; border-top: 1px solid var(--line); }
  .step:nth-child(odd) { border-right: 1px solid var(--line); }
  .step:nth-child(-n+2) { border-top: 0; }
  .step:nth-child(2) { border-left: 1px solid var(--line); border-top: 0; }
}

/* ground rules */
.rules { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.rule {
  border: 1px solid var(--line); border-radius: 14px; padding: 26px;
  background: var(--panel);
  display: flex; flex-direction: column; gap: 12px;
}
.rule .rn {
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--mint); align-self: flex-start;
  border-bottom: 1px solid var(--mint); padding-bottom: 3px;
}
.rule h3 { font-size: 20px; font-weight: 620; letter-spacing: -0.015em; line-height: 1.25; }
.rule p { font-size: 14px; color: var(--ink-2); }

/* no-promises strip */
.talk {
  border: 1.5px solid var(--peri); border-radius: 20px;
  padding: clamp(30px, 5vw, 56px);
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  background: linear-gradient(160deg, rgba(157, 184, 255, 0.08), rgba(157, 184, 255, 0.02));
}
.talk .eyebrow { color: var(--peri-2); }
.talk .eyebrow::before { background: var(--peri-2); }
.talk h2 { font-size: clamp(26px, 3.4vw, 44px); font-weight: 560; letter-spacing: -0.02em; line-height: 1.08; }
.talk-list { display: flex; flex-direction: column; gap: 0; }
.talk-item { display: flex; gap: 14px; padding: 14px 0; border-top: 1px solid var(--line); font-size: 15px; color: var(--ink-2); align-items: baseline; }
.talk-item b { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--peri); flex: none; width: 92px; }
.talk-item.no b { color: var(--mint); }

/* stamp */
.stamp {
  display: inline-block; font-family: var(--mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.26em; text-transform: uppercase; color: var(--peri);
  border: 1.5px solid var(--peri); border-radius: 8px; padding: 8px 14px 8px 18px;
  transform: rotate(-4deg);
}
.rv.in .stamp, .stamp.in { animation: stamp-in 0.5s var(--ease) 0.25s both; }
@keyframes stamp-in {
  0% { opacity: 0; transform: scale(1.8) rotate(-4deg); }
  60% { opacity: 1; transform: scale(0.92) rotate(-4deg); }
  100% { opacity: 1; transform: scale(1) rotate(-4deg); }
}

/* who chips */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em;
  border: 1px solid var(--line-2); border-radius: 999px; padding: 10px 18px;
  color: var(--ink-2); transition: all 0.3s;
}
.chip:hover { border-color: var(--peri); color: var(--peri); transform: translateY(-2px); }

/* ---------- CTA ---------- */
.ccta { text-align: center; }
.ccta-inner { display: flex; flex-direction: column; align-items: center; gap: 26px; }
.mail-big {
  font-family: var(--mono); font-size: clamp(15px, 2.2vw, 22px); letter-spacing: 0.05em;
  color: var(--ink); border-bottom: 1.5px solid var(--peri); padding-bottom: 4px;
  transition: color 0.3s, letter-spacing 0.4s var(--ease);
}
.mail-big:hover { color: var(--peri); letter-spacing: 0.1em; }
.ccta-list {
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-3);
  letter-spacing: 0.04em; line-height: 2; max-width: 620px;
}
.ccta-list b { color: var(--ink-2); font-weight: 500; }

/* ---------- footer ---------- */
.cftr { border-top: 1px solid var(--line); background: var(--bg-2); position: relative; overflow: hidden; }
.cftr-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 44px; padding: clamp(48px, 7vh, 76px) 0 44px; }
.cftr-col { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.cftr-h { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.26em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 4px; }
.cftr-l { font-size: 14.5px; color: var(--ink-2); transition: color 0.25s, transform 0.25s var(--ease); display: inline-block; }
.cftr-l:hover { color: var(--ink); transform: translateX(4px); }
.cftr-brand p { font-size: 14px; color: var(--ink-2); max-width: 320px; }
.cftr-status { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; color: var(--ink-3); display: inline-flex; align-items: center; gap: 9px; }
.cftr-status i { width: 6px; height: 6px; border-radius: 50%; background: var(--peri); }
.cftr-word {
  font-size: clamp(56px, 12vw, 180px); font-weight: 640; letter-spacing: -0.04em;
  line-height: 0.82; text-align: center; user-select: none; pointer-events: none;
  color: transparent; -webkit-text-stroke: 1px rgba(157, 184, 255, 0.14);
  margin: 20px 0 -10px; white-space: nowrap;
}
.cftr-bottom {
  border-top: 1px solid var(--line); padding: 20px 0;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em; color: var(--ink-3); text-transform: uppercase;
}
@media (max-width: 760px) { .cftr-grid { grid-template-columns: 1fr; } }

/* ---------- reveal ---------- */
.rv { opacity: 0; transform: translateY(30px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); transition-delay: var(--d, 0s); }
.rv.in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .chero-in { grid-template-columns: 1fr; align-items: start; }
  .desk { height: 480px; max-width: 460px; }
  .grow { grid-template-columns: 48px 1fr; }
  .grow p { grid-column: 2; }
  .talk { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001s !important; transition-duration: 0.001s !important; }
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; }
}