/* =========================================================
   aimpulso — design tokens
   ========================================================= */
:root{
  --bg:            #08090b;
  --bg-panel-0:    #0d0f12;
  --bg-panel-1:    #101318;
  --bg-panel-2:    #14171d;
  --fg:            #f4f2ec;
  --muted:         #9195a0;
  --line:          rgba(244,242,236,0.12);
  --accent:        #ff4d1c;
  --accent-dim:    #7a2b13;
  --tech:          #34e8d4;

  --font-display: "Bricolage Grotesque", "Helvetica Neue", sans-serif;
  --font-body:    "Sora", "Helvetica Neue", sans-serif;

  --ease: cubic-bezier(.16,.84,.32,1);
  --topbar-h: 4.5rem;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
html,body{ height:100%; }
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-body);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3{ font-family:var(--font-display); margin:0; }
p{ margin:0; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }
svg{ display:block; }

::selection{ background:var(--accent); color:#0a0a0a; }

/* film grain overlay */
.grain{
  position:fixed; inset:0; z-index:999; pointer-events:none;
  opacity:.05; mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

.eyebrow{
  display:inline-flex; align-items:center; gap:.6em;
  font-size:.78rem; letter-spacing:.18em; text-transform:uppercase;
  color:var(--tech); font-weight:600;
}
.eyebrow::before{
  content:""; width:1.6em; height:1px; background:var(--tech);
}

/* =========================================================
   nav
   ========================================================= */
.nav{
  position:fixed; top:var(--topbar-h); left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  padding:1.4rem clamp(1.25rem,4vw,3rem);
  transition:background .4s var(--ease), border-color .4s var(--ease), padding .4s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.is-scrolled{
  background:rgba(8,9,11,.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-color:var(--line);
  padding-block:1rem;
}
.nav__logo{
  font-family:var(--font-display); font-weight:700; font-size:1.15rem;
  letter-spacing:-.02em;
}
.nav__logo-accent{ color:var(--accent); }
.nav__links{ display:flex; align-items:center; gap:2.2rem; font-size:.92rem; }
.nav__links a:not(.nav__cta){ color:var(--muted); transition:color .25s; position:relative; }
.nav__links a:not(.nav__cta):hover{ color:var(--fg); }
.nav__cta{
  border:1px solid var(--line); padding:.55rem 1.1rem; border-radius:100px;
  transition:border-color .25s, background .25s;
}
.nav__cta:hover{ border-color:var(--accent); background:rgba(255,77,28,.08); }
.nav__burger{
  display:none; flex-direction:column; gap:5px; background:none; border:none;
  padding:.4rem; cursor:pointer;
}
.nav__burger span{ width:22px; height:2px; background:var(--fg); transition:transform .3s var(--ease), opacity .3s; }
.nav__burger[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav__burger[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* =========================================================
   hero
   ========================================================= */
.hero{
  position:relative;
  min-height:100svh;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  padding:calc(4rem + var(--topbar-h)) 1.5rem 6rem;
  overflow:hidden;
  isolation:isolate;
}
.hero__media{ position:absolute; inset:0; z-index:-2; }
.hero__canvas{ position:absolute; inset:0; width:100%; height:100%; display:block; }
.hero__video{
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; opacity:0;
}
.hero__video.is-active{ opacity:.55; transition:opacity 1.2s var(--ease); }
.hero__overlay{
  position:absolute; inset:0;
  background:
    radial-gradient(60% 50% at 50% 30%, rgba(8,9,11,0) 0%, rgba(8,9,11,.55) 65%, var(--bg) 100%),
    linear-gradient(180deg, rgba(8,9,11,.35) 0%, rgba(8,9,11,.15) 40%, var(--bg) 100%);
}

.hero__content{
  position:relative; z-index:1;
  max-width:920px; text-align:center;
  display:flex; flex-direction:column; align-items:center; gap:1.6rem;
}
.hero__title{
  font-size:clamp(2.6rem, 7vw, 5.4rem);
  line-height:.98; letter-spacing:-.03em; font-weight:700;
  display:flex; flex-direction:column; gap:.05em;
}
.hero__title span{ display:block; }
.hero__title--outline{
  color:transparent; -webkit-text-stroke:1.5px var(--fg);
  font-style:italic; font-weight:500;
}
.hero__subtitle{
  max-width:560px; color:var(--muted); font-size:1.08rem; line-height:1.6;
}
.hero__actions{ display:flex; flex-wrap:wrap; gap:1rem; justify-content:center; margin-top:.5rem; }

.btn{
  display:inline-flex; align-items:center; gap:.6rem;
  padding:.95rem 1.6rem; border-radius:100px;
  font-size:.95rem; font-weight:600; white-space:nowrap;
  transition:transform .3s var(--ease), background .3s, border-color .3s, color .3s;
}
.btn svg{ transition:transform .3s var(--ease); }
.btn:hover svg{ transform:translateX(3px); }
.btn--primary{ background:var(--accent); color:#100603; }
.btn--primary:hover{ transform:translateY(-2px); background:#ff6a3d; }
.btn--ghost{ border:1px solid var(--line); color:var(--fg); }
.btn--ghost:hover{ border-color:var(--fg); transform:translateY(-2px); }
.btn--lg{ padding:1.2rem 2rem; font-size:1.05rem; }

.scrollcue{
  position:absolute; bottom:2.4rem; left:50%; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:.7rem;
  z-index:1; color:var(--muted);
}
.scrollcue__label{ font-size:.7rem; letter-spacing:.18em; text-transform:uppercase; }
.scrollcue__track{
  width:1px; height:46px; background:var(--line); position:relative; overflow:hidden;
}
.scrollcue__dot{
  position:absolute; left:-1.5px; width:4px; height:14px; border-radius:2px;
  background:var(--accent);
  animation:cueMove 1.8s var(--ease) infinite;
}
@keyframes cueMove{
  0%{ top:-14px; opacity:0; }
  20%{ opacity:1; }
  80%{ opacity:1; }
  100%{ top:46px; opacity:0; }
}

/* =========================================================
   founders drawer — gaveta puxável acima do header
   ========================================================= */
.founders-drawer{ position:fixed; top:0; left:0; right:0; z-index:200; }

.founders-drawer__handle{
  position:relative; z-index:2; width:100%; height:var(--topbar-h);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:.55rem;
  background:#0a0b0d; border:none; border-bottom:1px solid var(--line);
  color:var(--fg); font-family:var(--font-body); cursor:grab;
  touch-action:none; -webkit-user-select:none; user-select:none;
  opacity:0; animation:topbarIn .8s var(--ease) .2s forwards;
}
.founders-drawer__handle:active{ cursor:grabbing; }
@keyframes topbarIn{ to{ opacity:1; } }

.founders-drawer__handle .dragbar{ position:static; transform:none; }

.founders-drawer__label{
  display:flex; align-items:center; gap:.5rem;
  font-size:.72rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted);
}
.founders-drawer__chevron{
  color:var(--tech); animation:cueBounce 1.6s var(--ease) infinite;
  transition:transform .4s var(--ease);
}
.founders-drawer.is-open .founders-drawer__chevron{
  transform:rotate(180deg); animation:none;
}

.founders-drawer__panel{
  position:absolute; top:100%; left:0; right:0;
  max-height:0; overflow:hidden;
  background:var(--bg-panel-1);
  border-bottom:1px solid var(--line);
  box-shadow:0 40px 90px -30px rgba(0,0,0,.75);
  transition:max-height .5s var(--ease);
}
.founders-drawer.is-open .founders-drawer__panel{ max-height:82vh; overflow-y:auto; }
.founders-drawer.is-dragging .founders-drawer__panel{ transition:none; }

.founders-drawer__grid{
  max-width:1180px; margin:0 auto;
  display:grid; grid-template-columns:1fr 1fr; gap:clamp(1.5rem,4vw,3rem);
  padding:clamp(1.8rem,4vw,3rem) clamp(1.25rem,4vw,3rem) clamp(2.2rem,5vw,3.5rem);
}

.founder-mini{ display:flex; flex-direction:column; gap:.7rem; }
.founder-mini__avatar{
  position:relative; width:64px; height:64px; border-radius:50%;
  overflow:hidden; background:linear-gradient(135deg,#232730,#0f1013);
  border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center;
}
.founder-mini__avatar img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.founder-mini__fallback{
  font-family:var(--font-display); font-weight:700; font-size:.85rem; color:var(--muted);
}
.founder-mini h3{ font-size:1.2rem; letter-spacing:-.01em; font-weight:600; }
.founder-mini__bio{ color:var(--muted); font-size:.9rem; line-height:1.65; }

.founders-drawer__backdrop{
  position:fixed; inset:0; z-index:-1;
  background:rgba(4,5,6,.6);
  backdrop-filter:blur(6px); -webkit-backdrop-filter:blur(6px);
  opacity:0; pointer-events:none;
  transition:opacity .4s var(--ease);
}
.founders-drawer.is-open .founders-drawer__backdrop{ opacity:1; pointer-events:auto; }

@media (max-width:760px){
  :root{ --topbar-h: 4rem; }
  .founders-drawer__grid{ grid-template-columns:1fr; gap:1.8rem; }
}

@media (prefers-reduced-motion: reduce){
  .founders-drawer__panel{ transition:none; }
  .founders-drawer__chevron{ animation:none; }
}

/* reveal-on-load (hero) */
.reveal{
  opacity:0; transform:translateY(22px);
  animation:revealUp .9s var(--ease) forwards;
  animation-delay:calc(var(--d,0) * .12s + .15s);
}
@keyframes revealUp{ to{ opacity:1; transform:translateY(0); } }

/* =========================================================
   services
   ========================================================= */
.services{
  position:relative; z-index:5; background:var(--bg);
  padding:clamp(5rem,10vw,8rem) clamp(1.25rem,4vw,3rem);
  border-top:1px solid var(--line);
}
.services__head{ max-width:760px; margin:0 auto 4rem; text-align:center; display:flex; flex-direction:column; gap:1.4rem; align-items:center; }
.services__title{
  font-size:clamp(1.9rem,4.2vw,3rem); line-height:1.15; letter-spacing:-.02em; font-weight:600;
}
.services__title em{ font-style:italic; color:var(--tech); font-weight:600; }
.services__lead{ color:var(--muted); font-size:1.05rem; line-height:1.6; max-width:560px; }

.services__grid{
  max-width:1180px; margin:0 auto;
  display:grid; grid-template-columns:repeat(3, 1fr); gap:1.5rem;
}
.service-card{
  position:relative; padding:2.2rem 1.8rem 2rem;
  border:1px solid var(--line); border-radius:20px;
  background:linear-gradient(180deg, var(--bg-panel-0), var(--bg));
  transition:transform .35s var(--ease), border-color .35s, background .35s;
  display:flex; flex-direction:column; gap:1rem;
  overflow:hidden;
}
.service-card::after{
  content:""; position:absolute; inset:0; opacity:0; pointer-events:none;
  background:radial-gradient(240px 140px at 20% 0%, rgba(255,77,28,.14), transparent 70%);
  transition:opacity .35s;
}
.service-card:hover{ transform:translateY(-6px); border-color:rgba(255,77,28,.4); }
.service-card:hover::after{ opacity:1; }
.service-card__num{
  font-family:var(--font-display); font-size:.85rem; font-weight:700;
  color:var(--muted); letter-spacing:.05em;
}
.service-card__icon{
  width:52px; height:52px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  background:rgba(52,232,212,.08); color:var(--tech);
  border:1px solid rgba(52,232,212,.25);
}
.service-card__icon svg{ width:26px; height:26px; }
.service-card h3{
  font-size:1.2rem; font-weight:600; letter-spacing:-.01em;
}
.service-card p{ color:var(--muted); font-size:.92rem; line-height:1.65; }

@media (max-width:900px){
  .services__grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:600px){
  .services__grid{ grid-template-columns:1fr; }
}

/* =========================================================
   stack (scroll-driven founder cards)
   ========================================================= */
.stack{ position:relative; }
.stack__item{ height:160svh; }
.stack__pin{
  position:sticky; top:0;
  height:100svh;
  display:flex; align-items:center; justify-content:center;
  padding:0 1.5rem;
  z-index:calc(var(--i) + 1);
}
.stack__pin--hero{ display:block; padding:0; }
.stack__pin--hero .hero{
  transform:scale(calc(1 - var(--depth,0) * .05));
  filter:brightness(calc(1 - var(--depth,0) * .35));
  transition:transform .1s linear, filter .1s linear;
}

.stack__panel{
  width:min(1180px, 100%);
  height:min(84svh, 780px);
  border-radius:32px 32px 0 0;
  border:1px solid var(--line);
  border-bottom:none;
  position:relative;
  padding:clamp(2rem,4vw,4rem);
  box-shadow:0 -40px 90px -30px rgba(0,0,0,.65);
  transform:scale(calc(1 - var(--depth,0) * .05));
  filter:brightness(calc(1 - var(--depth,0) * .35));
  transition:transform .1s linear, filter .1s linear;
  overflow:hidden;
}
.stack__item:nth-child(2) .stack__panel{ background:var(--bg-panel-0); }
.stack__item:nth-child(3) .stack__panel{ background:var(--bg-panel-1); }
.stack__item:nth-child(4) .stack__panel{ background:var(--bg-panel-2); }

.stack__panel::before{
  content:""; position:absolute; inset:0; opacity:.5; pointer-events:none;
  background:
    radial-gradient(700px 320px at 85% -10%, rgba(255,77,28,.14), transparent 60%),
    radial-gradient(600px 300px at -5% 110%, rgba(52,232,212,.10), transparent 60%);
}

.dragbar{
  position:absolute; top:1.1rem; left:50%; transform:translateX(-50%);
  width:52px; height:5px; border-radius:100px; background:var(--line);
}

.stack__cue{
  position:absolute; left:50%; bottom:clamp(1.2rem,3vw,2rem); transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:.5rem;
  color:var(--tech); pointer-events:none; z-index:2;
}
.stack__cue-label{
  font-size:.68rem; letter-spacing:.16em; text-transform:uppercase;
  color:var(--muted); white-space:nowrap;
}
.stack__cue-arrow{ animation:cueBounce 1.6s var(--ease) infinite; }
@keyframes cueBounce{
  0%,100%{ transform:translateY(0); opacity:.55; }
  50%{ transform:translateY(-7px); opacity:1; }
}

.stack__panel--intro{
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  text-align:center; gap:1.4rem;
}
.stack__intro-title{
  font-size:clamp(2.6rem,8vw,6rem); letter-spacing:-.03em; font-weight:700;
}
.stack__intro-copy{ max-width:520px; color:var(--muted); font-size:1.05rem; line-height:1.6; }

/* founder card layout */
.founder-card__grid{
  height:100%; display:grid; grid-template-columns:.8fr 1.2fr; gap:clamp(2rem,5vw,5rem);
  align-items:center;
}
.founder-card__avatar{ display:flex; align-items:center; justify-content:center; }

.avatar-mark{
  position:relative; width:min(46vw,320px); aspect-ratio:1/1;
  display:flex; align-items:center; justify-content:center;
}
.avatar-mark__ring{ position:absolute; inset:0; width:100%; height:100%; }
.avatar-mark__ring circle{
  fill:none; stroke:var(--tech); stroke-width:1.4; stroke-dasharray:6 10;
  opacity:.6; animation:spin 40s linear infinite;
  transform-origin:100px 100px;
}
.avatar-mark--alt .avatar-mark__ring circle{ stroke:var(--accent); animation-direction:reverse; animation-duration:52s; }
@keyframes spin{ to{ transform:rotate(360deg); } }

.avatar-mark::before{
  content:""; position:absolute; inset:8%; border-radius:50%;
  background:radial-gradient(circle at 32% 28%, #232730 0%, #14161b 55%, #0a0b0d 100%);
  box-shadow:inset 0 0 0 1px var(--line), 0 30px 60px -20px rgba(0,0,0,.7);
}
.avatar-mark__initials{
  position:relative; z-index:1;
  font-family:var(--font-display); font-weight:700;
  font-size:clamp(2.6rem,6vw,4rem); letter-spacing:-.02em;
  background:linear-gradient(135deg, var(--fg), var(--muted));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.founder-card__body{ display:flex; flex-direction:column; gap:1.1rem; max-width:640px; }
.founder-card__name{
  font-size:clamp(1.8rem,3.6vw,2.8rem); letter-spacing:-.02em; line-height:1.05;
}
.founder-card__bio{ color:var(--muted); font-size:1rem; line-height:1.7; }
.founder-card__tags{ display:flex; flex-wrap:wrap; gap:.6rem; margin-top:.4rem; }
.founder-card__tags li{
  font-size:.78rem; padding:.5rem .9rem; border-radius:100px;
  border:1px solid var(--line); color:var(--fg); opacity:.85;
}

.founder-reveal{
  opacity:0; transform:translateY(38px);
  transition:opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay:calc(var(--d,0) * .12s);
}
.stack__pin.is-active .founder-reveal{ opacity:1; transform:translateY(0); }
.stack__pin.is-active .avatar-mark{ animation:avatarIn .8s var(--ease) both; }
@keyframes avatarIn{ from{ opacity:0; transform:scale(.85) rotate(-6deg); } to{ opacity:1; transform:scale(1) rotate(0); } }

/* =========================================================
   closing / footer
   ========================================================= */
.closing{
  position:relative; z-index:5;
  min-height:100svh; display:flex; align-items:center; justify-content:center;
  text-align:center; padding:6rem 1.5rem; background:var(--bg);
  border-top:1px solid var(--line);
}
.closing__inner{ display:flex; flex-direction:column; align-items:center; gap:1.6rem; max-width:760px; }
.closing__title{
  font-size:clamp(2.1rem,5.4vw,3.6rem); letter-spacing:-.03em; line-height:1.08; font-weight:700;
}

.footer{
  position:relative; z-index:5; background:var(--bg);
  display:flex; flex-wrap:wrap; gap:.6rem 1.5rem; justify-content:space-between;
  padding:2rem clamp(1.25rem,4vw,3rem) 2.4rem;
  font-size:.85rem; color:var(--muted); border-top:1px solid var(--line);
}
.footer__muted{ opacity:.7; }

/* =========================================================
   responsive
   ========================================================= */
@media (max-width:860px){
  .nav__burger{ display:flex; }
  .nav__links{
    position:absolute; top:100%; left:0; right:0;
    background:rgba(8,9,11,.96); backdrop-filter:blur(14px);
    flex-direction:column; align-items:flex-start; gap:0;
    max-height:0; overflow:hidden; padding:0 clamp(1.25rem,4vw,3rem);
    border-bottom:1px solid transparent; transition:max-height .35s var(--ease), padding .35s var(--ease), border-color .35s;
  }
  .nav__links.is-open{ max-height:260px; padding:.5rem clamp(1.25rem,4vw,3rem) 1.5rem; border-color:var(--line); }
  .nav__links a{ padding:.85rem 0; width:100%; border-bottom:1px solid var(--line); }
  .nav__links a:last-child{ border-bottom:none; }
  .nav__cta{ text-align:center; margin-top:.5rem; }
  .founder-card__grid{ grid-template-columns:1fr; text-align:center; gap:1.6rem; }
  .founder-card__body{ align-items:center; margin:0 auto; }
  .founder-card__tags{ justify-content:center; }
  .avatar-mark{ width:44vw; max-width:220px; }
  .stack__item{ height:150svh; }
  .stack__panel{ height:auto; min-height:90svh; padding-top:3.2rem; overflow-y:auto; }
  .stack__cue{ position:static; transform:none; margin:2.2rem auto 0; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .reveal, .founder-reveal, .founders-drawer__handle{ animation:none !important; transition:none !important; opacity:1 !important; transform:none !important; }
  .scrollcue__dot, .avatar-mark__ring circle, .stack__cue-arrow{ animation:none !important; }
}