:root {
  --black: #0a0a0a;
  --black-soft: #121212;
  --surface: #1a1a1a;
  --surface-2: #232323;
  --white: #fafaf8;
  --chrome: #c7c7c7;
  --grey: #8a8a8a;
  --grey-dim: #555555;
  --line: rgba(255,255,255,0.08);

  --display: 'Alata', 'Helvetica Neue', sans-serif;
  --body: 'Inter', 'Arial', sans-serif;
/* ============ TEMA CLARO ============ */
:root[data-theme="light"] {
  --black: #fafaf8;
  --black-soft: #f0f0f0;
  --surface: #e8e8e8;
  --surface-2: #d8d8d8;
  --white: #0a0a0a;
  --chrome: #333333;
  --grey: #666666;
  --grey-dim: #888888;
  --line: rgba(0, 0, 0, 0.1);
}

/* Ajuste para o menu ficar legível no fundo branco */
:root[data-theme="light"] header {
  mix-blend-mode: normal;
}
  --ease: cubic-bezier(.16,1,.3,1);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }

body {
  background:var(--black);
  color:var(--white);
  font-family:var(--body);
  font-weight:300;
  overflow-x:hidden;
  cursor:default;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration:0.01ms !important; transition-duration:0.01ms !important; scroll-behavior:auto !important; }
}

a { color:inherit; text-decoration:none; }
::selection { background:var(--white); color:var(--black); }

/* ============ LOADER ============ */
#loader {
  position:fixed; inset:0; z-index:9999;
  background:var(--black);
  display:flex; align-items:center; justify-content:center;
  transition:opacity 0.9s var(--ease), visibility 0.9s var(--ease);
}
#loader.done { opacity:0; visibility:hidden; pointer-events:none; }

.loader-mark {
  font-family:var(--display);
  font-size:clamp(2.2rem, 6vw, 3.6rem);
  letter-spacing:0.04em;
  color:var(--white);
  opacity:0;
  transform:scale(0.92);
  animation:markIn 1.4s var(--ease) forwards 0.15s;
  position:relative;
}
.loader-mark::after {
  content:'';
  position:absolute; left:0; bottom:-14px;
  width:0%; height:1px;
  background:var(--grey);
  animation:lineGrow 1.1s var(--ease) forwards 0.55s;
}
@keyframes markIn {
  to { opacity:1; transform:scale(1); }
}
@keyframes lineGrow {
  to { width:100%; }
}

/* ============ NAV ============ */
header {
  position:fixed; top:0; left:0; right:0; z-index:500;
  display:flex; align-items:center; justify-content:space-between;
  padding:28px clamp(24px, 5vw, 64px);
  mix-blend-mode:difference;
}
.logo {
  font-family:var(--display);
  font-size:1.25rem;
  letter-spacing:0.03em;
  color:var(--white);
}
nav ul {
  display:flex; gap:clamp(20px, 3vw, 40px);
  list-style:none;
}
nav a {
  font-size:0.78rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--white);
  position:relative;
  padding-bottom:4px;
}
nav a::after {
  content:''; position:absolute; left:0; bottom:0;
  width:0; height:1px; background:var(--white);
  transition:width 0.4s var(--ease);
}
nav a:hover::after { width:100%; }
.nav-links { display:flex; }

.menu-toggle { display:none; background:none; border:none; color:var(--white); font-size:0.78rem; letter-spacing:0.12em; text-transform:uppercase; cursor:pointer; }

/* ============ HERO ============ */
.hero {
  position:relative;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:0 clamp(24px, 5vw, 64px);
  overflow:hidden;
}

.hero-glow {
  position:absolute;
  width:60vw; height:60vw;
  max-width:900px; max-height:900px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 65%);
  top:-10%; right:-15%;
  pointer-events:none;
  animation:glowPulse 8s ease-in-out infinite;
}
@keyframes glowPulse {
  0%,100% { opacity:0.7; transform:scale(1); }
  50% { opacity:1; transform:scale(1.08); }
}

.hero-eyebrow {
  font-size:0.78rem;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--grey);
  margin-bottom:28px;
  opacity:0;
  animation:fadeUp 1s var(--ease) forwards 1.3s;
}

.hero-title {
  font-family:var(--display);
  font-size:clamp(3.2rem, 11vw, 8.5rem);
  line-height:0.92;
  letter-spacing:-0.01em;
  color:var(--white);
  opacity:0;
  animation:fadeUp 1.1s var(--ease) forwards 1.45s;
}

.hero-sub {
  margin-top:32px;
  max-width:480px;
  font-size:clamp(1rem, 1.3vw, 1.15rem);
  line-height:1.6;
  color:var(--grey);
  font-weight:300;
  opacity:0;
  animation:fadeUp 1s var(--ease) forwards 1.7s;
}

.hero-cta {
  margin-top:48px;
  display:flex;
  align-items:center;
  gap:16px;
  opacity:0;
  animation:fadeUp 1s var(--ease) forwards 1.9s;
}
.btn {
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:16px 32px;
  border:1px solid var(--white);
  border-radius:100px;
  font-size:0.82rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--black);
  background:var(--white);
  transition:all 0.4s var(--ease);
}
.btn:hover {
  background:transparent;
  color:var(--white);
}
.btn-ghost {
  background:transparent;
  color:var(--white);
  border:1px solid var(--line);
}
.btn-ghost:hover {
  border-color:var(--white);
  background:var(--white);
  color:var(--black);
}

@keyframes fadeUp {
  from { opacity:0; transform:translateY(24px); }
  to { opacity:1; transform:translateY(0); }
}

.scroll-cue {
  position:absolute;
  bottom:40px; left:clamp(24px, 5vw, 64px);
  display:flex; align-items:center; gap:12px;
  font-size:0.72rem; letter-spacing:0.15em; text-transform:uppercase;
  color:var(--grey-dim);
  opacity:0;
  animation:fadeUp 1s var(--ease) forwards 2.2s;
}
.scroll-cue .line {
  width:1px; height:40px;
  background:var(--grey-dim);
  position:relative;
  overflow:hidden;
}
.scroll-cue .line::after {
  content:'';
  position:absolute; top:0; left:0; right:0;
  height:40%; background:var(--white);
  animation:scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform:translateY(-100%); }
  100% { transform:translateY(250%); }
}

/* ============ SHARED SECTION ============ */
section {
  position:relative;
  padding:160px clamp(24px, 5vw, 64px);
  border-top:1px solid var(--line);
}
.section-head {
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  margin-bottom:80px;
  gap:24px;
  flex-wrap:wrap;
}
.section-index {
  font-size:0.78rem;
  letter-spacing:0.15em;
  color:var(--grey-dim);
  text-transform:uppercase;
}
.section-title {
  font-family:var(--display);
  font-size:clamp(2.4rem, 5.5vw, 4.2rem);
  letter-spacing:-0.01em;
  line-height:1;
}
.section-title .accent { color:var(--grey); }

.reveal {
  opacity:0;
  transform:translateY(40px);
  transition:opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.in {
  opacity:1;
  transform:translateY(0);
}

/* ============ ABOUT ============ */
.about-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:80px;
  align-items:start;
}
.about-text p {
  font-size:clamp(1.05rem, 1.6vw, 1.4rem);
  line-height:1.7;
  color:var(--chrome);
  font-weight:300;
  margin-bottom:28px;
}
.about-text strong { color:var(--white); font-weight:500; }

.metal-frame {
  position:relative;
  aspect-ratio:4/5;
  border-radius:4px;
  overflow:hidden;
  background:var(--surface);
  display:flex; align-items:center; justify-content:center;
}
.metal-frame svg { width:85%; height:85%; }

.about-stats {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:32px;
  margin-top:64px;
  padding-top:48px;
  border-top:1px solid var(--line);
}
.stat-num {
  font-family:var(--display);
  font-size:clamp(2rem, 4vw, 3rem);
  color:var(--white);
}
.stat-label {
  font-size:0.78rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--grey);
  margin-top:8px;
}

/* ============ WHY ATLAS ============ */
.why-content {
  max-width:900px;
}
.why-content p {
  font-size:clamp(1.3rem, 2.6vw, 2rem);
  line-height:1.5;
  color:var(--chrome);
  font-weight:300;
}
.why-content strong { color:var(--white); font-weight:400; }

.why-pillars {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:var(--line);
  margin-top:96px;
  border:1px solid var(--line);
}
.pillar {
  background:var(--black);
  padding:48px 36px;
  transition:background 0.5s var(--ease);
}
.pillar:hover { background:var(--surface); }
.pillar-title {
  font-family:var(--display);
  font-size:1.4rem;
  margin-bottom:16px;
}
.pillar-text {
  font-size:0.92rem;
  line-height:1.6;
  color:var(--grey);
}

/* ============ TEAM ============ */
.team-grid {
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.member {
  background:var(--black);
  padding:40px 24px;
  text-align:center;
  transition:background 0.5s var(--ease);
}
.member:hover { background:var(--surface); }
.member-photo {
  width:88px; height:88px;
  border-radius:50%;
  margin:0 auto 24px;
  background:var(--surface-2);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--display);
  font-size:1.6rem;
  color:var(--grey);
  border:1px solid var(--line);
}
.member-name {
  font-size:1rem;
  font-weight:500;
  color:var(--white);
  margin-bottom:6px;
}
.member-role {
  font-size:0.78rem;
  letter-spacing:0.05em;
  color:var(--grey);
}

/* ============ SERVICES / PROJECTS ============ */
.project-list {
  display:flex;
  flex-direction:column;
}
.project-row {
  display:grid;
  grid-template-columns:80px 1.4fr 1fr;
  gap:40px;
  align-items:start;
  padding:44px 0;
  border-top:1px solid var(--line);
  transition:padding-left 0.5s var(--ease);
}
.project-row:hover { padding-left:16px; }
.project-row:last-child { border-bottom:1px solid var(--line); }
.project-num {
  font-family:var(--display);
  font-size:0.95rem;
  color:var(--grey-dim);
  padding-top:6px;
}
.project-name {
  font-family:var(--display);
  font-size:clamp(1.4rem, 2.6vw, 2rem);
  line-height:1.2;
}
.project-desc {
  font-size:0.95rem;
  line-height:1.65;
  color:var(--grey);
}
.project-desc .label {
  display:block;
  font-size:0.72rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--grey-dim);
  margin-bottom:6px;
  margin-top:14px;
}
.project-desc .label:first-child { margin-top:0; }

/* ============ CONTACT ============ */
.contact-wrap {
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:80px;
}
.contact-title {
  font-family:var(--display);
  font-size:clamp(2.6rem, 6vw, 4.8rem);
  line-height:1.05;
  letter-spacing:-0.01em;
}
.contact-title .accent { color:var(--grey); }
.contact-lead {
  margin-top:28px;
  font-size:1.05rem;
  line-height:1.6;
  color:var(--grey);
  max-width:440px;
}

.form-field {
  margin-bottom:32px;
}
.form-field label {
  display:block;
  font-size:0.72rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--grey);
  margin-bottom:12px;
}
.form-field input,
.form-field textarea {
  width:100%;
  background:transparent;
  border:none;
  border-bottom:1px solid var(--line);
  color:var(--white);
  font-family:var(--body);
  font-size:1.05rem;
  font-weight:300;
  padding:10px 0;
  transition:border-color 0.4s var(--ease);
  resize:none;
}
.form-field input:focus,
.form-field textarea:focus {
  outline:none;
  border-color:var(--white);
}
.form-field input::placeholder,
.form-field textarea::placeholder { color:var(--grey-dim); }

.contact-info {
  margin-top:56px;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.contact-info a {
  font-size:0.95rem;
  color:var(--grey);
  transition:color 0.3s var(--ease);
}
.contact-info a:hover { color:var(--white); }

/* ============ FOOTER ============ */
footer {
  padding:48px clamp(24px, 5vw, 64px);
  display:flex;
  justify-content:space-between;
  align-items:center;
  border-top:1px solid var(--line);
  font-size:0.78rem;
  letter-spacing:0.05em;
  color:var(--grey-dim);
  flex-wrap:wrap;
  gap:16px;
}
.footer-logo {
  font-family:var(--display);
  color:var(--grey);
  letter-spacing:0.03em;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .about-grid { grid-template-columns:1fr; gap:48px; }
  .about-stats { grid-template-columns:repeat(3,1fr); gap:16px; }
  .why-pillars { grid-template-columns:1fr; }
  .team-grid { grid-template-columns:repeat(2,1fr); }
  .project-row { grid-template-columns:1fr; gap:14px; }
  .project-num { padding-top:0; }
  .contact-wrap { grid-template-columns:1fr; gap:56px; }
  section { padding:110px 24px; }
}
@media (max-width: 600px) {
  .nav-links { display:none; }
  .menu-toggle { display:block; }
  .team-grid { grid-template-columns:1fr 1fr; }
  .hero-cta { flex-direction:column; align-items:flex-start; }
}