/* ============================================================
   AURIS — section & component styles
   ============================================================ */

/* ---------- NAV ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px var(--gutter);
  transition: background .5s, backdrop-filter .5s, padding .5s, border-color .5s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in oklab, var(--wine-deep) 78%, transparent);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  padding-block: 14px;
  border-bottom-color: var(--line);
}
.wordmark {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
}
.wordmark .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent-glow);
  box-shadow: 0 0 16px var(--accent-glow);
  animation: pulse 3.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{ opacity:.55; transform:scale(.82);} 50%{ opacity:1; transform:scale(1);} }
.nav-links { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 38px); }
.nav-link { font-size: 15px; color: var(--ink-dim); transition: color .3s; letter-spacing: -0.01em; }
.nav-link:hover { color: var(--ink); }
.nav .btn { padding: 0.62em 1.3em; font-size: 14px; }
@media (max-width: 760px){ .nav-link { display: none; } }

/* ---------- HERO ---------- */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 120px;
  padding-bottom: 60px;
  position: relative;
  overflow: hidden;
}
.hero-aura {
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 140%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 50% at 72% 30%, color-mix(in oklab, var(--accent-glow) calc(26% * var(--glow-strength)), transparent), transparent 70%),
    radial-gradient(50% 50% at 22% 68%, color-mix(in oklab, var(--accent) calc(22% * var(--glow-strength)), transparent), transparent 68%),
    radial-gradient(80% 60% at 50% 0%, var(--wine-mid), transparent 60%);
  filter: blur(8px);
  animation: drift 22s ease-in-out infinite alternate;
}
@keyframes drift {
  0% { transform: translate3d(0,0,0) scale(1); }
  100% { transform: translate3d(-3%, 2%, 0) scale(1.08); }
}
.hero-grain {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .5;
  background-image: radial-gradient(circle at 1px 1px, color-mix(in oklab, var(--rose-soft) 9%, transparent) 1px, transparent 0);
  background-size: 4px 4px;
  mask-image: radial-gradient(120% 90% at 50% 35%, #000, transparent 80%);
}
.hero .wrap { position: relative; z-index: 2; }
.hero h1 {
  font-size: var(--fs-display);
  line-height: 0.92;
  letter-spacing: -0.045em;
  font-weight: 400;
  max-width: 16ch;
}
.hero h1 .serif {
  font-size: 1.04em;
  letter-spacing: -0.01em;
  display: inline;
}
.hero-sub {
  margin-top: clamp(24px, 3vw, 40px);
  max-width: 46ch;
}
.hero-cta {
  margin-top: clamp(32px, 4vw, 52px);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}
.hero-meta {
  position: absolute;
  left: var(--gutter); right: var(--gutter); bottom: 30px;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.hero-meta .scroll-cue { display: flex; align-items: center; gap: 10px; }
.hero-meta .scroll-cue .bar {
  width: 1px; height: 38px;
  background: linear-gradient(var(--accent-glow), transparent);
  animation: cue 2.4s ease-in-out infinite;
  transform-origin: top;
}
@keyframes cue { 0%,100%{ transform: scaleY(.4); opacity:.4;} 50%{ transform: scaleY(1); opacity:1;} }
@media (max-width: 620px){ .hero-meta { font-size: 10px; } }

/* ---------- MANIFESTO ---------- */
.manifesto { text-align: left; }
.manifesto .big {
  font-size: var(--fs-h2);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.035em;
  max-width: 20ch;
}
.manifesto .big .dim { color: var(--ink-faint); }
.manifesto .big .serif { color: var(--accent-glow); }
.manifesto-grid {
  margin-top: clamp(48px, 7vw, 100px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 64px);
}
.manifesto-grid .item { border-top: 1px solid var(--line-strong); padding-top: 22px; }
.manifesto-grid .item .k {
  font-family: var(--font-mono);
  font-size: 13px; letter-spacing: 0.04em;
  color: var(--accent); margin-bottom: 14px;
}
.manifesto-grid .item p { color: var(--ink-dim); font-size: clamp(15px,1.05vw,17px); line-height: 1.5; }
@media (max-width: 820px){ .manifesto-grid { grid-template-columns: 1fr; gap: 26px; } }

/* ---------- POSITION (light) ---------- */
.position-statement { text-align: center; }
.position-statement .big {
  font-size: clamp(30px, 4.6vw, 68px);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: -0.035em;
  max-width: 24ch;
  margin-inline: auto;
}
.position-statement .big em { font-family: var(--font-serif); font-style: italic; color: var(--wine-mid); }

/* ============================================================
   FLOW — the interactive journey
   ============================================================ */
.flow { position: relative; }
.flow-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; flex-wrap: wrap; margin-bottom: clamp(40px, 6vw, 90px); }
.flow-head h2 { font-size: var(--fs-h2); max-width: 14ch; }
.flow-head .lead { max-width: 34ch; }

.flow-track { position: relative; }
/* spine */
.spine {
  position: absolute;
  left: clamp(18px, 4.2vw, 64px);
  top: 0; bottom: 0;
  width: 2px;
  background: var(--line);
}
.spine-fill {
  position: absolute;
  left: clamp(18px, 4.2vw, 64px);
  top: 0;
  width: 2px;
  height: 0;
  background: linear-gradient(var(--accent-glow), var(--accent));
  box-shadow: 0 0 calc(18px * var(--glow-strength)) var(--accent-glow);
  transition: height .15s linear;
}

.step {
  position: relative;
  padding-left: clamp(56px, 9vw, 150px);
  padding-block: clamp(34px, 5vw, 74px);
  border-bottom: 1px solid var(--line);
}
.step:last-child { border-bottom: none; }
.step .node {
  position: absolute;
  left: calc(clamp(18px, 4.2vw, 64px) - 7px);
  top: calc(clamp(34px, 5vw, 74px) + 6px);
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--wine-deep);
  border: 2px solid var(--line-strong);
  transition: border-color .5s, background .5s, box-shadow .5s, transform .5s;
  z-index: 2;
}
.step.active .node {
  border-color: var(--accent-glow);
  background: var(--accent-glow);
  box-shadow: 0 0 22px var(--accent-glow);
  transform: scale(1.15);
}
.step-num {
  font-family: var(--font-mono);
  font-size: clamp(13px, 1vw, 15px);
  letter-spacing: 0.1em;
  color: var(--accent);
  display: block;
  margin-bottom: 16px;
  transition: color .4s;
}
.step h3 {
  font-size: var(--fs-h3);
  font-weight: 700;
  margin-bottom: 6px;
}
.step .step-tag {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(20px, 1.9vw, 30px);
  color: var(--accent-glow);
  line-height: 1.05;
  margin-bottom: 20px;
  display: block;
}
.step .step-desc { color: var(--ink-dim); max-width: 48ch; font-size: clamp(16px,1.1vw,18px); line-height: 1.5; }

/* Sem / Com contrast */
.contrast {
  margin-top: 30px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: 760px;
}
.contrast .cell {
  border-radius: 16px;
  padding: 20px 22px;
  border: 1px solid var(--line);
}
.contrast .cell .ctag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 12px;
}
.contrast .cell .ctag::before { content:""; width: 7px; height: 7px; border-radius: 50%; }
.contrast .cell p { font-size: 14.5px; line-height: 1.45; color: var(--ink-dim); }
.contrast .sem { background: color-mix(in oklab, var(--wine) 50%, transparent); }
.contrast .sem .ctag { color: var(--ink-faint); }
.contrast .sem .ctag::before { background: var(--ink-faint); }
.contrast .com {
  background: color-mix(in oklab, var(--accent) 12%, var(--wine));
  border-color: color-mix(in oklab, var(--accent) 35%, transparent);
}
.contrast .com .ctag { color: var(--accent-glow); }
.contrast .com .ctag::before { background: var(--accent-glow); box-shadow: 0 0 10px var(--accent-glow); }
.contrast .com p { color: var(--cream); }
.contrast .com .time { font-weight: 700; color: var(--accent-glow); }
@media (max-width: 640px){ .contrast { grid-template-columns: 1fr; } }