/* ============================================================
   Parallax 360 — design tokens
   Two planes, one system: a warm human plane (the operator)
   and a cool machine plane (the AI), always shown together.
   ============================================================ */

:root {
  /* --- light (default) --- */
  --ink: #14171c;
  --ink-soft: #4d5460;
  --paper: #f7f4ee;
  --paper-raised: #ffffff;
  --line: #ded8ca;
  --line-strong: #c7bfab;

  --human: #b3702f;       /* the operator — warm, weathered brass */
  --human-soft: #f1ddbf;
  --human-ink: #6b4218;

  --machine: #1f7f86;     /* the AI — cool, exact teal */
  --machine-soft: #d3ecec;
  --machine-ink: #0f4548;

  --shadow: 0 1px 2px rgba(20, 23, 28, 0.04), 0 8px 24px -12px rgba(20, 23, 28, 0.18);

  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body: "Sora", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #ece7dc;
    --ink-soft: #a9a396;
    --paper: #101317;
    --paper-raised: #171b20;
    --line: #2b303a;
    --line-strong: #3a4048;

    --human: #d99a52;
    --human-soft: #3a2c19;
    --human-ink: #f0d3a4;

    --machine: #57c2c9;
    --machine-soft: #123539;
    --machine-ink: #a9e6e9;

    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -14px rgba(0, 0, 0, 0.6);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --ink: #ece7dc;
  --ink-soft: #a9a396;
  --paper: #101317;
  --paper-raised: #171b20;
  --line: #2b303a;
  --line-strong: #3a4048;

  --human: #d99a52;
  --human-soft: #3a2c19;
  --human-ink: #f0d3a4;

  --machine: #57c2c9;
  --machine-soft: #123539;
  --machine-ink: #a9e6e9;

  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -14px rgba(0, 0, 0, 0.6);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

html { overflow-x: hidden; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
  text-wrap: balance;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4.4rem); font-weight: 500; }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
h3 { font-size: 1.35rem; }

p { margin: 0 0 1em; color: var(--ink-soft); max-width: 62ch; }
a { color: inherit; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}
.eyebrow::before {
  content: "";
  width: 1.4em;
  height: 1px;
  background: linear-gradient(90deg, var(--human), var(--machine));
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.narrow { max-width: 720px; }

section { padding: clamp(3.5rem, 8vw, 7rem) 0; }
section + section { border-top: 1px solid var(--line); }

/* ---------- header ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
header.site .bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 3rem);
  max-width: 1120px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  width: 26px; height: 26px;
  position: relative;
  flex: none;
}
.brand-mark span {
  position: absolute;
  inset: 0;
  border-radius: 3px;
}
.brand-mark span:first-child {
  background: var(--human);
  transform: translate(-4px, 3px) rotate(-6deg);
  opacity: 0.9;
}
.brand-mark span:last-child {
  background: var(--machine);
  transform: translate(4px, -3px) rotate(6deg);
  opacity: 0.9;
  mix-blend-mode: multiply;
}
:root[data-theme="dark"] .brand-mark span:last-child { mix-blend-mode: screen; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand-mark span:last-child { mix-blend-mode: screen; }
}

nav.primary { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2.2rem); }
nav.primary a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--ink-soft);
  transition: color 0.15s ease;
}
nav.primary a:hover, nav.primary a[aria-current="page"] { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.65em 1.3em;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: var(--font-body);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: var(--shadow);
}
.btn-primary:hover { box-shadow: 0 10px 28px -10px color-mix(in srgb, var(--machine) 50%, var(--ink) 50%); }
.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--ink-soft); }
.btn-sm { padding: 0.5em 1em; font-size: 0.85rem; }

.menu-toggle { display: none; }

/* ---------- hero: two intersecting planes ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 8vw, 6rem);
  border-top: none;
}
.hero .wrap { position: relative; z-index: 2; }
.plane {
  position: absolute;
  border-radius: 28px;
  z-index: 1;
  will-change: transform;
}
.plane-human {
  width: min(60vw, 640px);
  height: min(60vw, 640px);
  right: -8%;
  top: -12%;
  background: radial-gradient(circle at 30% 30%, var(--human-soft), transparent 70%);
  transform: rotate(-8deg);
}
.plane-machine {
  width: min(46vw, 520px);
  height: min(46vw, 520px);
  left: -10%;
  bottom: -18%;
  background: radial-gradient(circle at 70% 70%, var(--machine-soft), transparent 70%);
  transform: rotate(10deg);
}
.hero-tag {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 0.45em 0.9em;
  border-radius: 999px;
  margin-bottom: 1.6rem;
}
.hero-tag .dot { width: 6px; height: 6px; border-radius: 50%; }
.hero-tag .dot.h { background: var(--human); }
.hero-tag .dot.m { background: var(--machine); }

.hero h1 { max-width: 15ch; }
.hero h1 .accent-human { color: var(--human); }
.hero h1 .accent-machine { color: var(--machine); }
.hero .lede { font-size: 1.2rem; max-width: 52ch; margin-top: 1.2rem; }
.hero .cta-row { display: flex; gap: 1rem; margin-top: 2.2rem; flex-wrap: wrap; }

/* ---------- duo cards (human / machine columns) ---------- */
.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 720px) { .duo { grid-template-columns: 1fr; } }
.duo-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}
.duo-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}
.duo-card.human::before { background: var(--human); }
.duo-card.machine::before { background: var(--machine); }
.duo-card .role {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
  display: inline-block;
}
.duo-card.human .role { color: var(--human); }
.duo-card.machine .role { color: var(--machine); }

/* ---------- feature grid ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr; } }
.feature {
  border-top: 1px solid var(--line);
  padding-top: 1.4rem;
}
.feature .num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ---------- steps (how it works) ---------- */
.steps { counter-reset: step; }
.step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
}
.step + .step { border-top: 1px solid var(--line); }
.step .badge {
  counter-increment: step;
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
}
.step .badge::before { content: counter(step); }
.step:nth-child(odd) .badge { color: var(--human); border-color: color-mix(in srgb, var(--human) 40%, var(--line-strong)); }
.step:nth-child(even) .badge { color: var(--machine); border-color: color-mix(in srgb, var(--machine) 40%, var(--line-strong)); }

/* ---------- pricing ---------- */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; align-items: stretch; }
@media (max-width: 900px) { .plans { grid-template-columns: 1fr; } }
.plan {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
}
.plan.featured {
  border-color: var(--machine);
  box-shadow: var(--shadow);
  position: relative;
}
.plan.featured::after {
  content: "Early access";
  position: absolute;
  top: -12px; right: 1.4rem;
  background: var(--machine);
  color: var(--paper-raised);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3em 0.7em;
  border-radius: 999px;
}
.plan .price { font-family: var(--font-display); font-size: 2.4rem; margin: 0.4rem 0 0.2rem; }
.plan .price small { font-family: var(--font-body); font-size: 0.95rem; color: var(--ink-soft); font-weight: 400; }
.plan ul { list-style: none; margin: 1.4rem 0; padding: 0; display: grid; gap: 0.6rem; }
.plan li { display: flex; gap: 0.6em; font-size: 0.92rem; color: var(--ink-soft); }
.plan li::before { content: "—"; color: var(--ink-soft); }
.plan .btn { margin-top: auto; justify-content: center; }

/* ---------- waitlist form ---------- */
.waitlist {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(1.5rem, 4vw, 2.6rem);
  box-shadow: var(--shadow);
}
.waitlist form {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.2rem;
}
.waitlist input[type="email"], .waitlist input[type="text"], .waitlist textarea, .waitlist select {
  flex: 1 1 240px;
  padding: 0.85em 1em;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
}
.waitlist textarea { width: 100%; min-height: 120px; resize: vertical; }
.waitlist input:focus, .waitlist textarea:focus, .waitlist select:focus {
  outline: 2px solid var(--machine);
  outline-offset: 1px;
}
.form-note { font-size: 0.82rem; color: var(--ink-soft); margin-top: 0.9rem; }
.form-status { font-size: 0.9rem; margin-top: 0.9rem; display: none; }
.form-status.ok { color: var(--machine-ink); display: block; }
.form-status.err { color: var(--human-ink); display: block; }

/* full-width single-column contact form */
.contact-form { display: grid; gap: 1rem; max-width: 560px; }
.field label { font-size: 0.85rem; font-weight: 600; display: block; margin-bottom: 0.4rem; }

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--line);
  padding: 3rem 0 2.5rem;
}
footer.site .cols {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
footer.site nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }
footer.site nav a { text-decoration: none; color: var(--ink-soft); font-size: 0.88rem; }
footer.site nav a:hover { color: var(--ink); }
footer.site .legal { font-size: 0.8rem; color: var(--ink-soft); margin-top: 2rem; }

.tag-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.tag-list span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3em 0.7em;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

/* mobile nav */
@media (max-width: 760px) {
  nav.primary { position: fixed; inset: 64px 0 0 0; background: var(--paper); flex-direction: column; justify-content: flex-start; align-items: flex-start; padding: 2rem clamp(1.25rem, 4vw, 3rem); gap: 1.6rem; transform: translateX(100%); transition: transform 0.25s ease; }
  nav.primary.open { transform: translateX(0); }
  nav.primary a { font-size: 1.1rem; }
  .menu-toggle { display: inline-flex; background: none; border: none; color: var(--ink); font-size: 1.5rem; cursor: pointer; padding: 0.2rem; }
  .grid-3, .plans { gap: 1.25rem; }
}

.legal-body h2 { margin-top: 2rem; }
.legal-body p, .legal-body li { color: var(--ink-soft); }
.legal-body { max-width: 72ch; }
.updated-note { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-soft); }