:root {
  --bg: #050810;
  --bg2: #080d1a;
  --surface: #0d1425;
  --surface2: #111b30;
  --cyan: #00d4ff;
  --cyan-dim: #00d4ff44;
  --cyan-glow: #00d4ff22;
  --violet: #7c3aed;
  --violet-dim: #7c3aed44;
  --green: #00ff9d;
  --green-dim: #00ff9d22;
  --yellow: #ffd700;
  --yellow-dim: #ffd70020;
  --danger: #ff6b6b;
  --text: #e2eaf7;
  --text-muted: #6b7fa3;
  --text-dim: #3a4a6b;
  --border: #1a2540;
  --border-bright: #2a3d60;
  --font-display: 'Orbitron', monospace;
  --font-body: 'Syne', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: .35;
}

[data-lang="en"] {
  display: none;
}

body.en [data-lang="pt"] {
  display: none !important;
}

body.en [data-lang="en"],
body.en h1 [data-lang="en"],
body.en h2 [data-lang="en"],
body.en h3 [data-lang="en"],
body.en p [data-lang="en"],
body.en a [data-lang="en"],
body.en span[data-lang="en"] {
  display: inline !important;
}

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

a {
  color: inherit;
}

button,
input,
textarea,
select {
  font: inherit;
}

::-webkit-scrollbar {
  width: 4px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--cyan-dim);
  border-radius: 2px;
}

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 4rem;
  background: linear-gradient(to bottom, rgba(5, 8, 16, .95), transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}

nav.scrolled {
  border-bottom-color: var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .15em;
  color: var(--cyan);
  text-decoration: none;
}

.nav-logo span {
  color: var(--text);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-muted);
  text-decoration: none;
  letter-spacing: .1em;
  text-transform: uppercase;
  transition: color .2s;
}

.nav-links a:hover {
  color: var(--cyan);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .12em;
  cursor: pointer;
  background: none;
  border: 1px solid var(--border-bright);
  color: var(--text-muted);
  padding: .35rem .8rem;
  border-radius: 4px;
  transition: all .2s;
}

.lang-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.nav-cta,
.btn-primary,
.btn-secondary,
.form-submit {
  text-decoration: none;
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: none;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  padding: .5rem 1.2rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background .2s, box-shadow .2s;
}

.nav-cta:hover {
  background: var(--cyan-dim);
  box-shadow: 0 0 20px var(--cyan-dim);
}

section {
  padding: 6rem 4rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .25em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: .05em;
  line-height: 1.15;
}

.section-sub {
  margin-top: 1rem;
  font-size: .95rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.divider {
  width: 50px;
  height: 2px;
  background: linear-gradient(to right, var(--cyan), var(--violet));
  margin: 1.2rem auto 0;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 400;
  letter-spacing: .25em;
  color: var(--cyan);
  text-transform: uppercase;
}

.hero-tag::before {
  content: '[ ';
}

.hero-tag::after {
  content: ' ]';
}

.btn-primary {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  background: var(--cyan);
  color: var(--bg);
  border: none;
  padding: .85rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 700;
  transition: box-shadow .2s, transform .15s;
}

.btn-primary:hover {
  box-shadow: 0 0 30px #00d4ff66;
  transform: translateY(-2px);
}

.btn-secondary {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  background: none;
  color: var(--text);
  border: 1px solid var(--border-bright);
  padding: .85rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}

.btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  text-align: left;
}

.form-label {
  font-family: var(--font-mono);
  font-size: .65rem;
  color: var(--text-muted);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.form-input,
.form-textarea {
  background: var(--surface);
  border: 1px solid var(--border-bright);
  border-radius: 6px;
  padding: .8rem 1rem;
  font-family: var(--font-body);
  font-size: .9rem;
  color: var(--text);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-glow);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

.form-select {
  appearance: none;
}

.form-submit {
  font-family: var(--font-display);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  background: var(--cyan);
  color: var(--bg);
  border: none;
  padding: 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: box-shadow .2s, transform .15s, opacity .2s;
}

.form-submit:hover {
  box-shadow: 0 0 30px #00d4ff55;
  transform: translateY(-2px);
}

.form-submit:disabled {
  opacity: .7;
  cursor: not-allowed;
  transform: none;
}

footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2.5rem 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: .8rem;
  color: var(--text-muted);
  letter-spacing: .1em;
}

.footer-brand strong {
  color: var(--cyan);
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: .62rem;
  color: var(--text-dim);
  letter-spacing: .08em;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: .62rem;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: .08em;
  transition: color .2s;
}

.footer-links a:hover {
  color: var(--cyan);
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  nav {
    padding: 1rem 1.5rem;
  }

  .nav-links {
    display: none;
  }

  section {
    padding: 4rem 1.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  footer {
    flex-direction: column;
    text-align: center;
    padding: 2rem 1.5rem;
  }
}