/* ————— LATENT INSTITUTE ————— */

:root {
  --bg: #0b0f14;
  --bg-2: #0e1319;
  --panel: #10161d;
  --line: #26303c;
  --line-soft: #1a222c;
  --txt: #e6ecf2;
  --txt-dim: #93a0ae;
  --txt-faint: #5d6a77;
  --rose: #d98ca2;
  --rose-soft: rgba(217, 140, 162, 0.55);
  --grotesk: 'Space Grotesk', 'Helvetica Neue', sans-serif;
  --mono: 'Space Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--txt);
  font-family: var(--grotesk);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; }
a { color: inherit; text-decoration: none; }

/* ————— NAV ————— */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.4rem 3rem;
  transition: background 0.5s, backdrop-filter 0.5s, padding 0.4s;
}

.nav.scrolled {
  background: rgba(11, 15, 20, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.9rem 3rem;
  border-bottom: 1px solid var(--line-soft);
}

.brand { display: flex; flex-direction: column; line-height: 1.25; }
.brand-main { font-size: 0.95rem; font-weight: 500; letter-spacing: 0.35em; }
.brand-sub { font-size: 0.5rem; letter-spacing: 0.52em; color: var(--txt-dim); }

.nav-links {
  display: flex;
  gap: 2.2rem;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  color: var(--txt-dim);
  text-transform: uppercase;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color 0.3s, border-color 0.3s;
}

.nav-links a:hover, .nav-links a.active { color: var(--txt); border-color: var(--rose); }

.nav-actions { display: flex; gap: 0.9rem; align-items: center; }

.btn-ghost, .btn-line {
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  padding: 0.55rem 1.1rem;
  transition: color 0.3s, border-color 0.3s, background 0.3s;
}

.btn-ghost { color: var(--txt-dim); }
.btn-ghost:hover { color: var(--txt); }

.btn-line { border: 1px solid var(--line); color: var(--txt); }
.btn-line:hover { border-color: var(--rose); background: rgba(217, 140, 162, 0.08); }

.nav-burger { display: none; }

/* ————— HERO ————— */

.hero {
  position: relative;
  height: 100vh;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
}

.hero-stage { position: absolute; inset: 0; will-change: transform, filter; }

.hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 38%;
  user-select: none;
  -webkit-user-select: none;
}

video.hero-media { pointer-events: none; }

/* — billboard projection overlays — */

.billboards { position: absolute; inset: 0; overflow: hidden; }

.bb {
  position: absolute;
  top: 0; left: 0;
  transform-origin: 0 0;
  will-change: transform, opacity;
  filter: saturate(0.65) contrast(0.93) brightness(0.97) blur(0.7px);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 5%, #000 90%, transparent 100%),
    linear-gradient(90deg, transparent 0%, #000 4%, #000 96%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(180deg, transparent 0%, #000 5%, #000 90%, transparent 100%),
    linear-gradient(90deg, transparent 0%, #000 4%, #000 96%, transparent 100%);
  mask-composite: intersect;
}

.bb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 3.2s ease;
}

.bb img.on { opacity: 1; }

.bb .scan {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, rgba(0,0,0,0.14) 0 1px, transparent 1px 3px);
  pointer-events: none;
}

.bb .sheen {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 20%, rgba(190,215,255,0.12) 47%, transparent 62%);
  background-size: 220% 100%;
  animation: sheen-slide var(--sheen-dur, 19s) linear infinite;
  pointer-events: none;
}

@keyframes sheen-slide {
  0% { background-position: 120% 0; }
  100% { background-position: -120% 0; }
}

.bb.glitch { animation: bb-glitch 0.18s steps(2) 1; }

@keyframes bb-glitch {
  0%   { clip-path: inset(0 0 62% 0); transform: var(--m3d) translateX(3px); filter: saturate(0.6) brightness(1.22); }
  50%  { clip-path: inset(35% 0 18% 0); transform: var(--m3d) translateX(-4px); }
  100% { clip-path: inset(0); transform: var(--m3d); }
}

/* — fog — */

.fog {
  position: absolute;
  inset: -12%;
  pointer-events: none;
  mix-blend-mode: screen;
  will-change: transform;
}

.fog-a {
  background:
    radial-gradient(38% 26% at 24% 58%, rgba(126, 152, 176, 0.12), transparent 70%),
    radial-gradient(30% 22% at 55% 30%, rgba(110, 138, 165, 0.09), transparent 70%),
    radial-gradient(42% 28% at 42% 78%, rgba(96, 122, 148, 0.10), transparent 70%);
  filter: blur(34px);
  animation: fog-drift-a 53s ease-in-out infinite alternate;
}

.fog-b {
  background:
    radial-gradient(30% 22% at 60% 52%, rgba(140, 160, 185, 0.08), transparent 70%),
    radial-gradient(40% 26% at 30% 26%, rgba(105, 130, 158, 0.08), transparent 70%);
  filter: blur(46px);
  animation: fog-drift-b 71s ease-in-out infinite alternate;
}

@keyframes fog-drift-a {
  from { transform: translate3d(-2.5%, 0.6%, 0) scale(1); }
  to   { transform: translate3d(2.8%, -1.2%, 0) scale(1.06); }
}

@keyframes fog-drift-b {
  from { transform: translate3d(2.2%, -0.5%, 0) scale(1.04); }
  to   { transform: translate3d(-2.6%, 1.0%, 0) scale(1); }
}

/* — grain / vignette — */

.hero-grain, .page-grain {
  position: absolute;
  inset: -1%;
  pointer-events: none;
  opacity: 0.5;
  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' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-jitter 0.9s steps(3) infinite;
}

@keyframes grain-jitter {
  0% { transform: translate(0, 0); }
  33% { transform: translate(-2px, 1px); }
  66% { transform: translate(1px, -2px); }
  100% { transform: translate(0, 0); }
}

.hero-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 60% 40%, transparent 55%, rgba(6, 9, 13, 0.55) 100%),
    linear-gradient(180deg, rgba(11, 15, 20, 0.55) 0%, transparent 18%, transparent 62%, var(--bg) 99%);
}

/* — hero copy — */

.hero-copy {
  position: absolute;
  z-index: 5;
  left: 3.2rem;
  bottom: 16vh;
  max-width: 30rem;
  will-change: transform, opacity;
}

.rule { width: 4.2rem; height: 1px; background: var(--rose); margin-bottom: 2rem; }

.hero-copy h1 {
  font-size: clamp(2.4rem, 5.2vw, 4.4rem);
  font-weight: 300;
  letter-spacing: 0.34em;
  margin-left: 0.05em;
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.6);
}

.tagline {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.42em;
  color: var(--txt-dim);
  margin: 1.3rem 0 1.6rem;
}

.lede {
  font-size: 0.86rem;
  line-height: 1.85;
  color: var(--txt-dim);
  max-width: 24rem;
  text-shadow: 0 1px 16px rgba(0, 0, 0, 0.7);
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  margin-top: 2.2rem;
  padding: 0.85rem 1.4rem;
  border: 1px solid var(--line);
  font-size: 0.66rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--txt);
  background: rgba(11, 15, 20, 0.35);
  backdrop-filter: blur(6px);
  transition: border-color 0.35s, background 0.35s;
}

.cta:hover { border-color: var(--rose); background: rgba(217, 140, 162, 0.1); }
.cta-num { font-family: var(--mono); color: var(--rose); }
.cta-arrow { transition: transform 0.35s; }
.cta:hover .cta-arrow { transform: translateX(5px); }

.scroll-cue {
  position: absolute;
  z-index: 5;
  left: 50%;
  bottom: 2.2rem;
  width: 1px;
  height: 56px;
  background: rgba(230, 236, 242, 0.16);
  overflow: hidden;
}

.scroll-cue span {
  position: absolute;
  left: 0; top: -40%;
  width: 100%; height: 40%;
  background: var(--rose);
  animation: cue-fall 2.3s cubic-bezier(0.6, 0, 0.3, 1) infinite;
}

@keyframes cue-fall {
  0% { top: -40%; }
  70%, 100% { top: 110%; }
}

/* ————— TUTORIALS ————— */

.tutorials {
  position: relative;
  padding: 7rem 3.2rem 6rem;
  max-width: 90rem;
  margin: 0 auto;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 1.6rem;
  margin-bottom: 3.4rem;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.4em;
  color: var(--rose);
  margin-bottom: 0.9rem;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.6vw, 2.1rem);
  font-weight: 300;
  letter-spacing: 0.3em;
}

.index-mark { font-family: var(--mono); font-size: 0.68rem; color: var(--txt-faint); letter-spacing: 0.2em; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  padding: 0.9rem 0.9rem 1.1rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s ease, transform 0.9s ease, border-color 0.4s;
}

.card.in { opacity: 1; transform: translateY(0); }
.card:hover { border-color: var(--line); }

.card figure { position: relative; overflow: hidden; aspect-ratio: 3 / 2; }

.card figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85);
  transition: transform 1.1s cubic-bezier(0.2, 0.6, 0.2, 1), filter 0.6s;
}

.card:hover figure img { transform: scale(1.045); filter: saturate(1); }

.play {
  position: absolute;
  left: 0.9rem;
  bottom: 0.9rem;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid rgba(230, 236, 242, 0.45);
  border-radius: 50%;
  background: rgba(11, 15, 20, 0.45);
  backdrop-filter: blur(4px);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s, transform 0.4s;
}

.play::after {
  content: '';
  position: absolute;
  left: 55%; top: 50%;
  transform: translate(-50%, -50%);
  border-left: 8px solid var(--txt);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}

.card:hover .play { opacity: 1; transform: translateY(0); }

.progress {
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 2px;
  background: rgba(230, 236, 242, 0.12);
}

.progress::after {
  content: '';
  position: absolute;
  left: 0; top: 0;
  height: 100%;
  width: var(--p, 0%);
  background: var(--rose);
}

.card-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-top: 1.15rem;
  padding: 0 0.2rem;
}

.card-title { display: flex; gap: 0.85rem; }

.ep-num { font-family: var(--mono); font-size: 0.7rem; color: var(--txt-dim); padding-top: 0.15rem; }

.card h3 {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  line-height: 1.65;
}

.card-arrow { color: var(--txt-dim); transition: transform 0.35s, color 0.35s; padding-top: 0.1rem; }
.card:hover .card-arrow { transform: translateX(5px); color: var(--rose); }

.dur {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--txt-faint);
  letter-spacing: 0.18em;
  margin-top: 0.7rem;
  padding: 0 0.2rem 0 2.35rem;
}

/* ————— MANIFESTO / FOOTER ————— */

.manifesto {
  max-width: 90rem;
  margin: 0 auto;
  padding: 5rem 3.2rem 7rem;
}

.quote-rule { width: 2px; height: 3.4rem; background: var(--rose); margin-bottom: 1.8rem; }

.manifesto blockquote {
  font-size: clamp(1rem, 2vw, 1.45rem);
  font-weight: 300;
  letter-spacing: 0.14em;
  line-height: 2.1;
  color: var(--txt);
}

.quote-attr {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--txt-faint);
  margin-top: 1.6rem;
}

.footer {
  border-top: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2.6rem 3.2rem;
  flex-wrap: wrap;
}

.foot-brand { display: flex; flex-direction: column; line-height: 1.25; }

.foot-links { display: flex; gap: 2rem; margin-left: auto; }

.foot-links a {
  font-size: 0.6rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--txt-faint);
  transition: color 0.3s;
}

.foot-links a:hover { color: var(--txt); }

.foot-copy { width: 100%; font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.22em; color: var(--txt-faint); }

/* ————— MODAL ————— */

.modal { position: fixed; inset: 0; z-index: 90; display: none; }
.modal.open { display: block; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(6, 9, 13, 0.82);
  backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity 0.4s;
}

.modal.open .modal-backdrop { opacity: 1; }

.modal-panel {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -47%);
  width: min(880px, 92vw);
  background: var(--panel);
  border: 1px solid var(--line);
  opacity: 0;
  transition: opacity 0.45s, transform 0.45s;
}

.modal.open .modal-panel { opacity: 1; transform: translate(-50%, -50%); }

.modal-panel figure { aspect-ratio: 16 / 8.4; overflow: hidden; }
.modal-panel figure img { width: 100%; height: 100%; object-fit: cover; }

.modal-meta { padding: 1.6rem 1.8rem 1.9rem; }
.modal-meta h3 { font-size: 1rem; font-weight: 400; letter-spacing: 0.22em; margin: 0.2rem 0 0.6rem; }
.modal-meta .dur { padding: 0; }

.modal-note {
  margin-top: 1.1rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.74rem;
  color: var(--txt-dim);
  letter-spacing: 0.06em;
}

.modal-close {
  position: absolute;
  top: 0.7rem; right: 0.7rem;
  z-index: 2;
  width: 2.4rem; height: 2.4rem;
  background: rgba(11, 15, 20, 0.6);
  border: 1px solid var(--line);
  color: var(--txt);
  font-size: 1.1rem;
  cursor: pointer;
  transition: border-color 0.3s;
}

.modal-close:hover { border-color: var(--rose); }

/* ————— RESPONSIVE ————— */

@media (max-width: 1080px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .nav { padding: 1.1rem 1.4rem; }
  .nav.scrolled { padding: 0.9rem 1.4rem; }
  .nav-links, .nav-actions { display: none; }
  .nav-burger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-left: auto;
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
  }
  .nav-burger span { width: 22px; height: 1px; background: var(--txt); }

  .hero-media { object-position: 68% 38%; }
  .hero-copy { left: 1.4rem; right: 1.4rem; bottom: 12vh; }
  .tutorials { padding: 4.5rem 1.4rem 4rem; }
  .grid { grid-template-columns: 1fr; gap: 1.4rem; }
  .manifesto { padding: 3.5rem 1.4rem 5rem; }
  .footer { padding: 2.2rem 1.4rem; }
  .foot-links { margin-left: 0; flex-wrap: wrap; }
}

/* ————— MOTION SAFETY ————— */

@media (prefers-reduced-motion: reduce) {
  .fog-a, .fog-b, .hero-grain, .scroll-cue span, .bb .sheen { animation: none !important; }
  .card { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}