/* ---------- Tokens ---------- */
:root {
  --cream: #fffff5;
  --ink:   #000000;
  --paper: #ffffff;
  --rule:  rgba(0,0,0,0.18);
  --soft:  rgba(0,0,0,0.55);

  --syllabus:        #0000ff;
  --crypto:          #ff20ff;
  --post-neolib:     #7fbdff;
  --climate:         #ff4a00;

  --sans: 'Archivo', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;

  --maxw: 1440px;
  --pad: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

::selection { background: var(--ink); color: var(--cream); }

/* ---------- Top nav (deck-style page header) ---------- */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 14px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: color-mix(in srgb, var(--cream) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topbar__brand a { display: inline-flex; align-items: center; }
.topbar__mark { display: block; height: 34px; width: auto; image-rendering: -webkit-optimize-contrast; }

.topbar__nav { display: flex; gap: 22px; }
.topbar__nav a {
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}
.topbar__nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 100%; bottom: 0;
  height: 1px; background: currentColor;
  transition: right 0.25s ease;
}
.topbar__nav a:hover::after { right: 0; }

@media (max-width: 880px) {
  .topbar__nav { gap: 14px; }
}
@media (max-width: 520px) {
  .topbar__nav a:nth-child(n+4) { display: none; }
}

/* ---------- Section scaffolding (deck pages) ---------- */
.page {
  position: relative;
  padding: clamp(56px, 9vh, 96px) var(--pad);
  border-bottom: 1px solid var(--rule);
}
.page__inner {
  max-width: var(--maxw);
  margin: 0 auto;
}
.page__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-bottom: clamp(40px, 8vh, 80px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--soft);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}
.page__head__label { color: var(--ink); }
.page__head__right { text-align: right; }

/* ---------- HERO ---------- */
.hero {
  padding: clamp(140px, 22vh, 220px) var(--pad) clamp(40px, 6vh, 64px);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--rule);
}
.hero__bottom {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}
@media (max-width: 760px) { .hero__bottom { grid-template-columns: 1fr; } }

.hero__title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.hero__title em {
  font-style: normal;
  font-weight: inherit;
  display: block;
  color: inherit;
  letter-spacing: inherit;
}
.hero__lede {
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.55;
  max-width: 44ch;
  color: var(--ink);
}
.hero__lede em {
  font-style: italic;
}

.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.hero__chip {
  padding: 6px 10px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  display: inline-flex; align-items: center; gap: 8px;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.hero__chip::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--c, var(--ink));
  transition: background 0.25s ease;
}
.hero__chip:hover {
  background: var(--c, var(--ink));
  color: var(--cream);
  border-color: var(--c, var(--ink));
}
.hero__chip:hover::before {
  background: var(--cream);
}

/* ---------- ABOUT ---------- */
.about__grid {
  display: block;
}
@media (max-width: 760px) { .about__grid { display: block; } }

.about__body { max-width: 64ch; }
.about__pull {
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: clamp(28px, 4vh, 56px);
}
.about__pull em {
  font-style: normal;
}

.about__copy {
  font-size: clamp(15px, 1vw, 17px);
  line-height: 1.6;
}
.about__copy p + p { margin-top: 1.2em; }
.about__copy a {
  border-bottom: 1px solid var(--ink);
  padding-bottom: 1px;
  transition: background 0.2s ease, color 0.2s ease;
}
.about__copy a:hover { background: var(--ink); color: var(--cream); }

/* ---------- PROJECTS ---------- */
.projects__intro {
  display: block;
  margin-bottom: clamp(40px, 6vh, 72px);
}
.projects__intro p {
  max-width: 56ch;
  font-size: clamp(15px, 1vw, 17px);
  line-height: 1.55;
}

.project-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--ink);
}
.project {
  position: relative;
  display: grid;
  grid-template-columns: 60px minmax(280px, 1.3fr) minmax(0, 1fr) auto;
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
  padding: clamp(28px, 4vh, 44px) 0;
  border-bottom: 1px solid var(--ink);
  cursor: pointer;
  transition: padding 0.3s ease;
  --c: var(--ink);
  overflow: hidden;
  scroll-margin-top: 90px;
}
.project::before {
  content: '';
  position: absolute; inset: 0;
  background: var(--c);
  transform: translateY(101%);
  transition: transform 0.45s cubic-bezier(0.7, 0, 0.2, 1);
  z-index: 0;
}
.project:hover::before { transform: translateY(0); }
.project:hover { color: var(--cream); padding-left: clamp(12px, 2vw, 28px); padding-right: clamp(12px, 2vw, 28px); }
.project:hover .project__num { color: color-mix(in srgb, var(--cream) 75%, transparent); }
.project:hover .project__arrow { transform: translateX(8px); }

.project > * { position: relative; z-index: 1; }

.project__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--soft);
  padding-top: 0.6em;
  transition: color 0.3s ease;
}
.project__title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  word-wrap: break-word;
}
.project__title .swatch {
  display: inline-block;
  width: 0.6em; height: 0.6em;
  background: var(--c);
  margin-right: 0.25em;
  transform: translateY(-0.04em);
  transition: background 0.3s ease;
}
.project:hover .project__title .swatch { background: var(--cream); }

.project__body { font-size: clamp(14px, 1vw, 16px); line-height: 1.55; max-width: 52ch; padding-top: 0.4em; }
.project__arrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding-top: 0.8em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: transform 0.3s ease;
}
.project__arrow .arr { transition: transform 0.3s ease; }

@media (max-width: 880px) {
  .project { grid-template-columns: 1fr; gap: 12px; }
  .project__num { padding-top: 0; }
  .project__arrow { padding-top: 0; }
}

/* ---------- FOUNDATION (ANBI) ---------- */
.found__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}
@media (max-width: 880px) { .found__grid { grid-template-columns: 1fr; } }

.found__lead {
  font-weight: 600;
  font-size: clamp(20px, 1.8vw, 26px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: clamp(24px, 4vh, 40px);
  max-width: 32ch;
}
.found__lead em { font-style: normal; color: var(--soft); }

.found__copy { font-size: clamp(15px, 1vw, 17px); line-height: 1.6; max-width: 52ch; }
.found__copy p + p { margin-top: 1em; }
.found__copy a { border-bottom: 1px solid var(--ink); }
.found__copy a:hover { background: var(--ink); color: var(--cream); }

.found__data {
  border-top: 1px solid var(--ink);
}
.found__row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
  align-items: baseline;
}
.found__row dt {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--soft);
  font-weight: 400;
}
.found__row dd {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
}

.found__docs {
  margin-top: clamp(40px, 5vh, 56px);
  padding-top: 20px;
  border-top: 1px solid var(--ink);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}
@media (max-width: 640px) { .found__docs { grid-template-columns: 1fr; } }
.found__docs a {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  transition: background 0.2s ease, color 0.2s ease;
}
.found__docs a:hover { background: var(--ink); color: var(--cream); }
.found__docs a span:last-child { font-size: 14px; }

/* ---------- NEWSLETTER ---------- */
.news {
  background: var(--ink);
  color: var(--cream);
  border-bottom: none;
  position: relative;
  overflow: hidden;
}
.news .page__head { color: color-mix(in srgb, var(--cream) 60%, transparent); border-color: rgba(255,255,255,0.2); }
.news .page__head .page__head__label { color: var(--cream); }

.news__form {
  display: grid;
  gap: 16px;
  max-width: 560px;
}
.news__intro {
  font-size: 14px;
  line-height: 1.55;
  color: color-mix(in srgb, var(--cream) 80%, transparent);
  max-width: 38ch;
}
.news__field {
  display: grid;
  grid-template-columns: 1fr auto;
  border-bottom: 1px solid var(--cream);
}
.news__field input {
  background: transparent;
  border: none;
  color: var(--cream);
  font: inherit;
  font-size: 16px;
  padding: 14px 0;
  outline: none;
  width: 100%;
}
.news__field input::placeholder { color: color-mix(in srgb, var(--cream) 50%, transparent); }
.news__field button {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 14px 4px;
  display: inline-flex; align-items: center; gap: 10px;
  transition: gap 0.2s ease;
}
.news__field button:hover { gap: 14px; }

.news__success {
  display: none;
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid var(--post-neolib);
  background: color-mix(in srgb, var(--post-neolib) 18%, transparent);
  color: var(--post-neolib);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.news__success.is-on { display: block; }

/* ---------- FOOTER ---------- */
.foot {
  padding: clamp(48px, 7vh, 80px) var(--pad) 32px;
  background: var(--cream);
}
.foot__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: 32px;
  border-bottom: 1px solid var(--ink);
}
@media (max-width: 880px) { .foot__inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot__inner { grid-template-columns: 1fr; } }

.foot__brand img { width: clamp(140px, 14vw, 200px); }
.foot__brand p {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--soft);
  line-height: 1.6;
}

.foot__col h4 {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--soft);
  font-weight: 500;
  margin-bottom: 14px;
}
.foot__col ul { list-style: none; display: grid; gap: 8px; }
.foot__col a {
  font-size: 14px;
  position: relative;
  display: inline-block;
}
.foot__col a::after {
  content: '';
  position: absolute; left: 0; right: 100%; bottom: -2px;
  height: 1px; background: var(--ink);
  transition: right 0.25s ease;
}
.foot__col a:hover::after { right: 0; }

.foot__bottom {
  max-width: var(--maxw);
  margin: 20px auto 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--soft);
}

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}