/* ————————————————————————————————
   COGITO — manifesto site
   Near-pure-text. Dark. Restrained.
———————————————————————————————— */

:root {
  --bg: #0b0b0d;
  --ink: #e8e4dc;
  --ink-dim: #9a958b;
  --ink-faint: #55524c;
  --hairline: #232227;
  --accent: #e8e4dc;
  --serif: "Spectral", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
  --measure: 34em;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1.02rem, 0.95rem + 0.3vw, 1.18rem);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

em { font-style: italic; }
strong { font-weight: 500; }

/* ——— nav ——— */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 2rem;
  z-index: 10;
  mix-blend-mode: difference;
}

.nav__mark {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-decoration: none;
  opacity: 0.9;
}

.nav__contact {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 300;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-decoration: none;
  opacity: 0.65;
  transition: opacity 0.3s ease;
}
.nav__contact:hover { opacity: 1; }

/* ——— hero ——— */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0 1.5rem;
}

.hero__symbols {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__symbols span {
  position: absolute;
  font-family: var(--serif);
  color: var(--ink);
  opacity: 0;
  animation: symbol-pulse var(--dur, 14s) ease-in-out var(--delay, 0s) infinite;
}

@keyframes symbol-pulse {
  0%, 100% { opacity: 0; }
  50% { opacity: var(--peak, 0.07); }
}

.hero__inner {
  position: relative;
  text-align: center;
  max-width: 46em;
}

.hero__title {
  font-size: clamp(2rem, 1.2rem + 4.2vw, 4rem);
  font-weight: 300;
  line-height: 1.22;
  letter-spacing: -0.01em;
  opacity: 0;
  animation: rise 1.6s 0.3s ease forwards;
}

.cursor {
  display: inline-block;
  width: 0.06em;
  height: 0.85em;
  margin-left: 0.12em;
  background: var(--ink);
  vertical-align: baseline;
  animation: blink 1.2s step-end 2s infinite;
  opacity: 0;
}

@keyframes blink {
  0%, 100% { opacity: 0; }
  50% { opacity: 0.85; }
}

.hero__sub {
  margin-top: 2.2rem;
  font-size: clamp(0.98rem, 0.9rem + 0.35vw, 1.15rem);
  color: var(--ink-dim);
  opacity: 0;
  animation: rise 1.6s 1.1s ease forwards;
}

.hero__scroll {
  position: absolute;
  bottom: 2.2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--ink-faint);
  font-size: 0.9rem;
  opacity: 0;
  animation: rise 1.6s 2s ease forwards;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero__scroll { animation-name: rise-scroll; }
@keyframes rise-scroll {
  from { opacity: 0; transform: translate(-50%, 14px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ——— sections ——— */

.section {
  max-width: var(--measure);
  margin: 0 auto;
  padding: clamp(7rem, 14vh, 11rem) 1.5rem 0;
}

.section:last-of-type {
  padding-bottom: clamp(7rem, 14vh, 11rem);
}

.section__label {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 2.6rem;
}

.section__label::before {
  content: "";
  display: block;
  width: 2.4rem;
  border-top: 1px solid var(--hairline);
  margin-bottom: 2.6rem;
}

.section h2 {
  font-size: clamp(1.55rem, 1.2rem + 1.6vw, 2.3rem);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: -0.005em;
  margin-bottom: 2.4rem;
}

.section__body p + p { margin-top: 1.5em; }

.section__body { color: var(--ink-dim); }

.section__claim {
  color: var(--ink);
  font-size: 1.12em;
}

.section__refrain {
  color: var(--ink);
  font-style: italic;
  font-size: 1.15em;
  letter-spacing: 0.01em;
}

/* ——— path ——— */

.path {
  list-style: none;
  margin-top: 0.5rem;
}

.path__phase {
  padding: 2.4rem 0;
  border-top: 1px solid var(--hairline);
  color: var(--ink-dim);
}
.path__phase:last-child { border-bottom: 1px solid var(--hairline); }

.path__head {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  margin-bottom: 1rem;
}

.path__numeral {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--ink-faint);
  min-width: 1.6rem;
}

.path__name {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink);
}

.path__now {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--ink-dim);
  padding: 0.18em 0.6em 0.14em;
  border-radius: 2px;
}

/* ——— cogito ——— */

.cogito__name {
  font-family: var(--mono);
  font-weight: 300;
  font-size: clamp(1.9rem, 1.3rem + 2.6vw, 3.1rem) !important;
  letter-spacing: 0.42em;
  text-indent: 0.42em; /* optical centering vs letterspacing */
}

.cogito__soon {
  font-style: italic;
  color: var(--ink);
  margin-top: 2.4em !important;
}

/* ——— contact ——— */

.contact__email { margin-top: 2.4em !important; }

.contact__email a {
  font-family: var(--mono);
  font-size: 0.95em;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-faint);
  padding-bottom: 0.15em;
  transition: border-color 0.3s ease;
}
.contact__email a:hover { border-color: var(--ink); }

/* ——— footer ——— */

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  border-top: 1px solid var(--hairline);
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.footer__mark { font-family: var(--serif); font-size: 1.1rem; }

/* ——— reveal on scroll ——— */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 1.1s ease, transform 1.1s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ——— narrow screens ——— */

@media (max-width: 640px) {
  .hero__title br { display: none; }
}

/* ——— motion preferences ——— */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero__title, .hero__sub, .hero__scroll { animation: none; opacity: 1; transform: none; }
  .cursor { animation: none; opacity: 0.85; }
  .hero__symbols span { animation: none; opacity: 0.05; }
  .reveal { opacity: 1; transform: none; transition: none; }
}