/* ==========================================================================
   Parallax Engine — landing
   Dark editorial aesthetic. Black canvas, high-contrast serif display,
   refined grotesque body. Layered depth motifs nod to the engine itself.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Spectral:ital@0;1&family=Archivo:wght@300;400;500;600&display=swap');

:root {
  --ink:        #060606;
  --ink-2:      #0c0c0d;
  --ink-3:      #131315;
  --paper:      #f3efe7;   /* warm off-white */
  --paper-dim:  #c9c4ba;
  --paper-mute: #847f76;
  --line:       rgba(243, 239, 231, 0.12);
  --line-soft:  rgba(243, 239, 231, 0.07);
  --accent:     #f3efe7;
  --glow:       rgba(243, 239, 231, 0.06);

  --serif:  'Playfair Display', Georgia, serif;
  --serif-2:'Spectral', Georgia, serif;
  --sans:   'Archivo', system-ui, sans-serif;

  --maxw: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  position: relative;
}

/* Film grain overlay — adds editorial texture, sits above everything */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: screen;
}

/* Ambient depth field — slow drifting planes that echo the parallax concept */
.field {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.field span {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
}
.field span:nth-child(1) {
  width: 52vw; height: 52vw;
  top: -12vw; left: -8vw;
  background: radial-gradient(circle at 40% 40%, rgba(243,239,231,0.10), transparent 65%);
  animation: drift 26s var(--ease) infinite alternate;
}
.field span:nth-child(2) {
  width: 40vw; height: 40vw;
  bottom: -10vw; right: -6vw;
  background: radial-gradient(circle at 60% 60%, rgba(120,130,160,0.10), transparent 65%);
  animation: drift 32s var(--ease) infinite alternate-reverse;
}
.field span:nth-child(3) {
  width: 30vw; height: 30vw;
  top: 40%; left: 55%;
  background: radial-gradient(circle at 50% 50%, rgba(180,150,120,0.08), transparent 65%);
  animation: drift 38s var(--ease) infinite alternate;
}
@keyframes drift {
  from { transform: translate3d(0,0,0) scale(1); }
  to   { transform: translate3d(4vw, 5vw, 0) scale(1.12); }
}

/* Faint baseline grid lines for editorial structure */
.field::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px);
  background-size: calc(100% / 3) 100%;
  background-position: center;
  opacity: 0.6;
}

/* ----------------------------------------------------------- layout shell */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.content { position: relative; z-index: 1; }

/* ----------------------------------------------------------------- header */
header.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px) saturate(140%);
  background: rgba(6,6,6,0.55);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  color: var(--paper);
}
.brand img {
  width: 38px; height: 38px;
  border-radius: 9px;
  display: block;
}
.brand .name {
  font-family: var(--serif);
  font-size: 1.18rem;
  letter-spacing: 0.01em;
  font-weight: 600;
}
.brand .name em {
  font-style: italic;
  font-weight: 400;
  color: var(--paper-dim);
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a {
  color: var(--paper-dim);
  text-decoration: none;
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.3s var(--ease);
}
.nav-links a:hover { color: var(--paper); }

/* ------------------------------------------------------------- buttons */
.btn {
  --pad: 16px 30px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: var(--pad);
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.4s var(--ease), background 0.4s var(--ease),
              color 0.4s var(--ease), box-shadow 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.btn .arrow { transition: transform 0.4s var(--ease); }
.btn:hover .arrow { transform: translateX(5px); }

.btn-primary {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 12px 40px -16px rgba(243,239,231,0.55);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 60px -18px rgba(243,239,231,0.7);
}
.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line);
}
.btn-ghost:hover {
  border-color: var(--paper-dim);
  background: rgba(243,239,231,0.04);
  transform: translateY(-2px);
}
.btn-sm { --pad: 11px 20px; font-size: 0.82rem; }

/* ----------------------------------------------------------------- hero */
.hero {
  position: relative;
  padding: clamp(80px, 14vh, 150px) 0 clamp(70px, 11vh, 130px);
  overflow: hidden;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 0.74rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--paper-mute);
  margin-bottom: 30px;
}
.eyebrow::before {
  content: "";
  width: 34px; height: 1px;
  background: var(--paper-mute);
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.9rem, 8.2vw, 6.4rem);
  line-height: 0.99;
  letter-spacing: -0.02em;
  max-width: 14ch;
}
.hero h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--paper-dim);
}
.hero .lede {
  margin-top: 30px;
  max-width: 50ch;
  font-family: var(--serif-2);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.62;
  color: var(--paper-dim);
}
.hero-cta {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

/* Hero stacked-layer visual — literal depth illustration */
.stack {
  position: relative;
  margin-top: clamp(60px, 9vh, 100px);
  height: clamp(280px, 42vh, 460px);
  perspective: 1400px;
}
.plane {
  position: absolute;
  inset: 0;
  margin: auto;
  width: min(78%, 760px);
  height: 78%;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(243,239,231,0.05), rgba(243,239,231,0.005));
  backdrop-filter: blur(2px);
  display: grid;
  place-items: center;
  transform-style: preserve-3d;
  transition: transform 0.6s var(--ease);
}
.plane span {
  font-family: var(--serif);
  font-style: italic;
  color: var(--paper-mute);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}
.plane.p1 { transform: translateZ(-160px) translateY(46px) scale(0.86); opacity: 0.4; }
.plane.p2 { transform: translateZ(-80px)  translateY(24px) scale(0.93); opacity: 0.65; }
.plane.p3 {
  transform: translateZ(0) scale(1);
  background:
    radial-gradient(120% 120% at 30% 20%, rgba(243,239,231,0.12), rgba(243,239,231,0.02) 60%);
  box-shadow: 0 40px 90px -40px rgba(0,0,0,0.9), inset 0 1px 0 rgba(243,239,231,0.15);
}
.plane.p3 span {
  color: var(--paper);
  font-size: 1.5rem;
  font-style: normal;
}
/* gentle continuous float to evoke parallax motion */
.stack { animation: hover-stack 9s ease-in-out infinite; }
@keyframes hover-stack {
  0%,100% { transform: rotateX(8deg) rotateY(-9deg) translateY(0); }
  50%     { transform: rotateX(10deg) rotateY(-6deg) translateY(-14px); }
}

/* --------------------------------------------------------------- sections */
section.block { padding: clamp(70px, 11vh, 130px) 0; position: relative; }

.section-head { max-width: 60ch; margin-bottom: clamp(44px, 7vh, 78px); }
.section-head .kicker {
  font-size: 0.74rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--paper-mute);
  margin-bottom: 18px;
}
.section-head h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
}
.section-head h2 em { font-style: italic; color: var(--paper-dim); font-weight: 400; }
.section-head p {
  margin-top: 20px;
  color: var(--paper-dim);
  font-family: var(--serif-2);
  font-size: 1.1rem;
  max-width: 52ch;
}

.divider { height: 1px; background: var(--line); border: 0; }

/* ------------------------------------------------------------- features */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  overflow: hidden;
}
.feature {
  background: var(--ink);
  padding: 38px 34px 44px;
  position: relative;
  transition: background 0.5s var(--ease);
  min-height: 230px;
  display: flex;
  flex-direction: column;
}
.feature:hover { background: var(--ink-3); }
.feature .num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--paper-mute);
  margin-bottom: 26px;
}
.feature .ico {
  width: 40px; height: 40px;
  margin-bottom: 22px;
  color: var(--paper);
  opacity: 0.92;
}
.feature h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.feature p { color: var(--paper-mute); font-size: 0.96rem; line-height: 1.62; }

/* ---------------------------------------------------------- editor split */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(36px, 5vw, 80px);
  align-items: center;
}
.split .visual {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--ink-2);
  padding: 22px;
  aspect-ratio: 4 / 3.1;
  overflow: hidden;
}
.split .visual .bar {
  display: flex; gap: 7px; margin-bottom: 18px;
}
.split .visual .bar i {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--line); display: block;
}
.canvas {
  position: relative;
  height: calc(100% - 30px);
  border: 1px dashed var(--line);
  border-radius: 12px;
  background:
    radial-gradient(120% 120% at 70% 20%, rgba(243,239,231,0.06), transparent 60%);
  overflow: hidden;
}
.canvas .layer {
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(243,239,231,0.04);
  display: grid; place-items: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.8rem;
  color: var(--paper-mute);
  animation: layerfloat 7s ease-in-out infinite;
}
.canvas .l1 { inset: 14% 50% 46% 12%; animation-delay: 0s; }
.canvas .l2 { inset: 30% 16% 26% 40%; animation-delay: 1.4s; background: rgba(243,239,231,0.07); color: var(--paper-dim);}
.canvas .l3 { inset: 54% 30% 12% 22%; animation-delay: 0.7s; }
@keyframes layerfloat {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-9px); }
}
.canvas .grab {
  position: absolute;
  right: 22%; top: 38%;
  width: 18px; height: 18px;
  border: 2px solid var(--paper);
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(243,239,231,0.12);
  animation: nudge 5s var(--ease) infinite;
}
@keyframes nudge {
  0%,100% { transform: translate(0,0); }
  40%     { transform: translate(-40px, 18px); }
  60%     { transform: translate(-40px, 18px); }
}

.steps { list-style: none; margin-top: 14px; }
.steps li {
  display: flex;
  gap: 20px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
}
.steps li:last-child { border-bottom: 1px solid var(--line-soft); }
.steps .s-num {
  font-family: var(--serif);
  font-style: italic;
  color: var(--paper-mute);
  font-size: 1.05rem;
  flex-shrink: 0;
  width: 28px;
}
.steps h4 { font-family: var(--serif); font-weight: 600; font-size: 1.15rem; margin-bottom: 5px; }
.steps p { color: var(--paper-mute); font-size: 0.95rem; }

/* --------------------------------------------------------------- download */
.download-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: clamp(44px, 7vw, 80px);
  text-align: center;
  background:
    radial-gradient(140% 120% at 50% -10%, rgba(243,239,231,0.10), transparent 55%),
    var(--ink-2);
  overflow: hidden;
}
.download-card .badge {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--paper-mute);
  margin-bottom: 24px;
}
.download-card h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin-bottom: 18px;
}
.download-card h2 em { font-style: italic; color: var(--paper-dim); font-weight: 400; }
.download-card p.sub {
  color: var(--paper-dim);
  font-family: var(--serif-2);
  font-size: 1.12rem;
  max-width: 46ch;
  margin: 0 auto 38px;
}
.dl-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.note {
  margin-top: 30px;
  font-size: 0.85rem;
  color: var(--paper-mute);
  line-height: 1.7;
  max-width: 52ch;
  margin-left: auto;
  margin-right: auto;
}
.note strong { color: var(--paper-dim); font-weight: 500; }
.note kbd {
  font-family: var(--sans);
  font-size: 0.8rem;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(243,239,231,0.04);
  color: var(--paper-dim);
}

/* logo plinth for editor page */
.plinth {
  display: grid;
  place-items: center;
  margin-bottom: 30px;
}
.plinth img {
  width: 96px; height: 96px;
  border-radius: 22px;
  box-shadow: 0 30px 70px -30px rgba(0,0,0,0.9), 0 0 0 1px var(--line);
  animation: bob 6s ease-in-out infinite;
}
@keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-9px)} }

/* ----------------------------------------------------------------- footer */
footer.foot {
  border-top: 1px solid var(--line-soft);
  padding: 50px 0 60px;
}
.foot-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
}
.foot .brand .name { font-size: 1.05rem; }
.foot p { color: var(--paper-mute); font-size: 0.84rem; }
.foot-links { display: flex; gap: 24px; }
.foot-links a { color: var(--paper-mute); text-decoration: none; font-size: 0.84rem; transition: color 0.3s var(--ease); }
.foot-links a:hover { color: var(--paper); }

/* ----------------------------------------------------- entrance reveals */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  animation: rise 1s var(--ease) forwards;
}
@keyframes rise { to { opacity: 1; transform: none; } }
.d1 { animation-delay: 0.05s; }
.d2 { animation-delay: 0.18s; }
.d3 { animation-delay: 0.31s; }
.d4 { animation-delay: 0.44s; }
.d5 { animation-delay: 0.57s; }
.d6 { animation-delay: 0.70s; }

/* scroll-in for sections */
.in-view {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.in-view.seen { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal, .in-view { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------- responsive */
@media (max-width: 900px) {
  .features { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
  .split .visual { order: 2; }
}
@media (max-width: 620px) {
  .nav-links a:not(.btn) { display: none; }
  .features { grid-template-columns: 1fr; }
  .hero { padding-top: 56px; }
  .foot-inner { flex-direction: column; align-items: flex-start; }
  .wrap { padding: 0 20px; }
  .nav-inner { padding: 14px 20px; }
}