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

    :root {
      --bg: #0b0c0f;
      --surface: #13151a;
      --border: #1f2229;
      --text: #e8eaf0;
      --muted: #b8c0cc;
      --accent: #0057ff;
      --accent2: #1e7bff;
      --accent-soft: rgba(0, 87, 255, 0.08);
      --accent-border: rgba(0, 87, 255, 0.22);
      --white: #ffffff;
    }

    html { scroll-behavior: smooth; }

    body {
      background: var(--bg);
      color: var(--text);
      font-family: 'DM Sans', sans-serif;
      font-weight: 300;
      line-height: 1.7;
      overflow-x: hidden;
    }

    /* ── NAVBAR ── */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1.6rem 5vw;
      background: #000000;
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border);
      transition: background 0.3s;
    }

    .logo { display: inline-flex; align-items: center; text-decoration: none; }
    .logo img { height: 78px; width: auto; display:block; filter: drop-shadow(0 0 10px rgba(0,87,255,0.18)); }

    .nav-links {
      display: flex;
      gap: 2.5rem;
      list-style: none;
    }
    .nav-links a {
      color: var(--muted); text-rendering: optimizeLegibility;
      text-decoration: none;
      font-size: 0.875rem;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      transition: color 0.2s;
    }
    .nav-links a:hover { color: var(--accent); }

    .nav-cta {
      background: var(--accent);
      color: #000 !important;
      padding: 0.5rem 1.25rem;
      border-radius: 2px;
      font-weight: 400 !important;
      transition: opacity 0.2s !important;
    }
    .nav-cta:hover { opacity: 0.85; color: #000 !important; }

    /* hamburger */
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 4px;
    }
    .hamburger span {
      display: block;
      width: 24px; height: 2px;
      background: var(--text);
      transition: 0.3s;
    }

    /* ── HERO ── */
    #home {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 10rem 5vw 6rem;
      position: relative;
      overflow: hidden;
    }

    .hero-grid-overlay {
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(0,87,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,87,255,0.04) 1px, transparent 1px);
      background-size: 60px 60px;
      mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
    }

    .hero-glow {
      position: absolute;
      top: 20%; left: 55%;
      width: 720px; height: 720px;
      background:
        radial-gradient(circle at center, rgba(30,123,255,0.18) 0%, rgba(30,123,255,0.10) 18%, transparent 38%),
        radial-gradient(circle at 30% 40%, rgba(0,87,255,0.12) 0%, transparent 42%),
        radial-gradient(circle at 70% 60%, rgba(120,180,255,0.08) 0%, transparent 46%),
        radial-gradient(circle at center, rgba(0,87,255,0.05) 0%, transparent 72%);
      filter: blur(6px);
      transform: translate(-50%, -50%);
      pointer-events: none;
    }

    .hero-tag {
      font-size: 0.75rem;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 1.5rem;
      opacity: 0;
      animation: fadeUp 0.8s 0.2s forwards;
    }

    h1 {
      font-family: 'Exo 2', sans-serif;
      font-weight: 800;
      font-size: clamp(2.8rem, 7vw, 6rem);
      line-height: 1.02;
      letter-spacing: -0.03em;
      color: var(--white);
      max-width: 14ch;
      opacity: 0;
      animation: fadeUp 0.8s 0.35s forwards;
    }
    h1 em {
      font-style: normal;
      color: var(--accent);
    }

    .hero-sub {
      margin-top: 2rem;
      max-width: 46ch;
      font-size: 1.05rem;
      color: var(--muted); text-rendering: optimizeLegibility;
      opacity: 0;
      animation: fadeUp 0.8s 0.5s forwards;
    }

    .hero-actions {
      margin-top: 3rem;
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      opacity: 0;
      animation: fadeUp 0.8s 0.65s forwards;
    }

    .btn-primary {
      display: inline-block;
      background: var(--accent);
      color: #000;
      padding: 0.85rem 2rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.9rem;
      text-decoration: none;
      border-radius: 2px;
      transition: opacity 0.2s, transform 0.2s;
    }
    .btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }

    .btn-outline {
      display: inline-block;
      border: 1px solid var(--border);
      color: var(--text);
      padding: 0.85rem 2rem;
      font-size: 0.9rem;
      text-decoration: none;
      border-radius: 2px;
      transition: border-color 0.2s, color 0.2s;
    }
    .btn-outline:hover { border-color: var(--accent); color: var(--accent); }

    .hero-stats {
      margin-top: 5rem;
      display: flex;
      gap: 3rem;
      flex-wrap: wrap;
      opacity: 0;
      animation: fadeUp 0.8s 0.8s forwards;
    }
    .stat-item strong {
      display: block;
      font-family: 'Exo 2', sans-serif;
      font-size: 2rem;
      font-weight: 700;
      color: var(--white);
      line-height: 1;
    }
    .stat-item span {
      font-size: 0.8rem;
      color: var(--muted); text-rendering: optimizeLegibility;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    /* ── SECTIONS COMMONS ── */
    section { padding: 7rem 5vw; }
    .section-label {
      font-size: 0.72rem;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 1rem;
    }
    h2 {
      font-family: 'Exo 2', sans-serif;
      font-weight: 700;
      font-size: clamp(1.8rem, 4vw, 3rem);
      letter-spacing: -0.025em;
      color: var(--white);
      line-height: 1.1;
    }
    .divider {
      width: 40px; height: 2px;
      background: var(--accent);
      margin: 1.5rem 0;
    }

    /* ── QUEM SOMOS ── */
    #quem-somos {
      background: var(--surface);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 5rem;
      align-items: center;
      max-width: 1100px;
    }
    .about-text p {
      color: var(--muted); text-rendering: optimizeLegibility;
      margin-bottom: 1.2rem;
      font-size: 1rem;
    }
    .about-visual {
      position: relative;
      height: 320px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    /* Tetrahedron SVG decoration */
    .tetra-wrap {
      width: 220px; height: 220px;
      animation: rotate3d 12s linear infinite;
    }
    @keyframes rotate3d {
      from { transform: rotate(0deg); }
      to   { transform: rotate(360deg); }
    }
    .about-pill {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(0,87,255,0.08);
      border: 1px solid rgba(0,87,255,0.22);
      color: var(--accent);
      font-size: 0.8rem;
      padding: 0.4rem 0.9rem;
      border-radius: 100px;
      margin-bottom: 1.5rem;
    }

    /* ── SERVIÇOS ── */
    #servicos { background: var(--bg); }
    .services-intro {
      max-width: 600px;
      margin-bottom: 4rem;
    }
    .services-intro p { color: var(--muted); text-rendering: optimizeLegibility; margin-top: 1rem; }

    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 1.5px;
      background: var(--bg);
      border: 1px solid var(--border);
    }
    .service-card {
      background: var(--bg);
      padding: 2.5rem;
      transition: background 0.25s;
      position: relative;
      overflow: hidden;
    }
    .service-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
      background: var(--accent);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.3s;
    }
    .service-card:hover { background: var(--surface); }
    .service-card:hover::before { transform: scaleX(1); }

    .service-icon {
      width: 44px; height: 44px;
      margin-bottom: 1.5rem;
      color: var(--accent);
    }
    .service-card h3 {
      font-family: 'Exo 2', sans-serif;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--white);
      margin-bottom: 0.75rem;
    }
    .service-card p {
      color: var(--muted); text-rendering: optimizeLegibility;
      font-size: 0.9rem;
      line-height: 1.65;
    }
    .service-num {
      position: absolute;
      bottom: 1.5rem; right: 2rem;
      font-family: 'Exo 2', sans-serif;
      font-size: 3rem;
      font-weight: 800;
      color: rgba(255,255,255,0.03);
      line-height: 1;
    }

    /* ── CONTATO ── */
    #contato {
      background: var(--surface);
      border-top: 1px solid var(--border);
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 5rem;
      max-width: 1000px;
    }
    .contact-info h2 { margin-bottom: 0.5rem; }
    .contact-info p { color: var(--muted); text-rendering: optimizeLegibility; margin-top: 1rem; margin-bottom: 2.5rem; font-size: 1rem; }
    .contact-detail {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      color: var(--muted); text-rendering: optimizeLegibility;
      font-size: 0.9rem;
      margin-bottom: 1rem;
    }
    .contact-detail svg { color: var(--accent); flex-shrink: 0; }
    .contact-detail a { color: var(--muted); text-rendering: optimizeLegibility; text-decoration: none; transition: color 0.2s; }
    .contact-detail a:hover { color: var(--accent); }

    /* form */
    .contact-form { display: flex; flex-direction: column; gap: 1rem; }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
    .form-group { display: flex; flex-direction: column; gap: 0.4rem; }
    .form-group label { font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); text-rendering: optimizeLegibility; }
    .form-group input,
    .form-group textarea,
    .form-group select {
      background: var(--bg);
      border: 1px solid var(--border);
      color: var(--text);
      padding: 0.75rem 1rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.9rem;
      border-radius: 2px;
      outline: none;
      transition: border-color 0.2s;
      appearance: none;
    }
    .form-group input:focus,
    .form-group textarea:focus,
    .form-group select:focus { border-color: var(--accent); }
    .form-group textarea { resize: vertical; min-height: 120px; }
    .form-submit {
      margin-top: 0.5rem;
      background: var(--accent);
      color: #000;
      border: none;
      padding: 0.9rem 2rem;
      font-family: 'DM Sans', sans-serif;
      font-size: 0.9rem;
      cursor: pointer;
      border-radius: 2px;
      align-self: flex-start;
      transition: opacity 0.2s;
    }
    .form-submit:hover { opacity: 0.85; }
    .form-success {
      display: none;
      background: rgba(0,87,255,0.08);
      border: 1px solid rgba(0,87,255,0.22);
      color: var(--accent);
      padding: 1rem 1.5rem;
      border-radius: 2px;
      font-size: 0.9rem;
      margin-top: 0.5rem;
    }

    /* ── FOOTER ── */
    footer {
      padding: 2.5rem 5vw;
      background: #000000;
      border-top: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
    }
    footer .logo { font-size: 1rem; }
    footer p { font-size: 0.8rem; color: var(--muted); text-rendering: optimizeLegibility; }

    /* ── ANIMATIONS ── */
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(24px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.visible { opacity: 1; transform: none; }

    /* ── RESPONSIVE ── */
    @media (max-width: 768px) {
      .nav-links { display: none; flex-direction: column; gap: 1.5rem; }
      .nav-links.open {
        display: flex;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        padding: 2rem 5vw;
      }
      .hamburger { display: flex; }
      .about-grid,
      .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
      .about-visual { display: none; }
      .form-row { grid-template-columns: 1fr; }
      .hero-stats { gap: 2rem; }
      footer { flex-direction: column; text-align: center; }
    }
  
/* === TetraSpace Premium Blue Upgrade === */

.btn-primary,
.form-submit,
.nav-cta {
  box-shadow: 0 0 24px rgba(0,87,255,0.18);
}

.service-card:hover,
.svc-card:hover,
.project-card:hover {
  border-color: rgba(0,87,255,0.35);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  box-shadow: 0 0 0 3px rgba(0,87,255,0.15);
}

/* refined glow */
.hero-glow {
  background: radial-gradient(circle, rgba(30,123,255,0.14) 0%, transparent 72%) !important;
}


.hero-noise {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  pointer-events: none;
  mix-blend-mode: soft-light;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.08) 0 1px, transparent 1px),
    radial-gradient(circle at 80% 40%, rgba(255,255,255,0.06) 0 1px, transparent 1px),
    radial-gradient(circle at 40% 80%, rgba(255,255,255,0.05) 0 1px, transparent 1px),
    radial-gradient(circle at 60% 60%, rgba(255,255,255,0.04) 0 1px, transparent 1px);
  background-size:
    180px 180px,
    240px 240px,
    210px 210px,
    260px 260px;
}


/* === Advanced Engineering Hero Upgrade === */

.hero-blueprint-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.08;
  background-image:
    linear-gradient(90deg, transparent 0%, rgba(0,87,255,0.12) 50%, transparent 100%),
    linear-gradient(transparent 0%, rgba(0,87,255,0.08) 50%, transparent 100%);
  background-size: 420px 1px, 1px 420px;
}

.hero-cad-orbit {
  position: absolute;
  width: 780px;
  height: 780px;
  border: 1px solid rgba(0,87,255,0.08);
  border-radius: 50%;
  top: 48%;
  left: 58%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-cad-orbit::before,
.hero-cad-orbit::after {
  content: '';
  position: absolute;
  inset: 48px;
  border-radius: 50%;
  border: 1px dashed rgba(30,123,255,0.10);
}

.hero-cad-orbit::after {
  inset: 110px;
  border-style: solid;
  opacity: 0.45;
}

.hero-tech-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image:
    radial-gradient(circle at 12% 28%, rgba(0,87,255,0.9) 0 1px, transparent 2px),
    radial-gradient(circle at 82% 32%, rgba(0,87,255,0.8) 0 1px, transparent 2px),
    radial-gradient(circle at 68% 76%, rgba(255,255,255,0.8) 0 1px, transparent 2px),
    radial-gradient(circle at 34% 62%, rgba(0,87,255,0.8) 0 1px, transparent 2px);
}

.hero-scanline {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(255,255,255,0.015),
    transparent 6%,
    transparent 94%,
    rgba(255,255,255,0.015)
  );
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.hero-glow {
  filter: blur(10px);
}


/* === HERO 2.0 REAL === */

#home {
  display: grid !important;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 4rem;
}

.hero-content {
  position: relative;
  z-index: 5;
}

.hero-visual {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-blueprint {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(0,87,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,87,255,0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black 45%, transparent 90%);
}

.hero-rings {
  position: absolute;
  width: 640px;
  height: 640px;
  border-radius: 50%;
  border: 1px solid rgba(0,87,255,0.16);
  box-shadow:
    0 0 60px rgba(0,87,255,0.12),
    inset 0 0 60px rgba(0,87,255,0.08);
}

.hero-rings::before,
.hero-rings::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  inset: 50px;
  border: 1px dashed rgba(0,87,255,0.24);
}

.hero-rings::after {
  inset: 130px;
  border-style: solid;
  opacity: 0.5;
}

.hero-core {
  position: relative;
  width: 320px;
  height: 320px;
  transform: rotate(45deg);
  background:
    linear-gradient(135deg,
      rgba(0,87,255,0.9),
      rgba(30,123,255,0.15));
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow:
    0 0 80px rgba(0,87,255,0.35),
    0 0 180px rgba(0,87,255,0.18);
  animation: heroFloat 8s ease-in-out infinite;
}

.hero-core::before {
  content: '';
  position: absolute;
  inset: 24px;
  border: 1px solid rgba(255,255,255,0.16);
}

.hero-core::after {
  content: '';
  position: absolute;
  inset: 70px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
}

.hero-pulse {
  position: absolute;
  width: 760px;
  height: 760px;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(0,87,255,0.18) 0%,
    rgba(0,87,255,0.08) 30%,
    transparent 72%);
  filter: blur(18px);
}

.hero-data {
  position: absolute;
  top: 10%;
  right: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-data-box {
  width: 180px;
  padding: 1rem;
  background: rgba(19,21,26,0.72);
  border: 1px solid rgba(0,87,255,0.18);
  backdrop-filter: blur(12px);
}

.hero-data-box strong {
  display: block;
  color: #ffffff;
  font-size: 1.2rem;
  font-family: 'Exo 2', sans-serif;
}

.hero-data-box span {
  color: #b8c0cc;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

@keyframes heroFloat {
  0% { transform: rotate(45deg) translateY(0px); }
  50% { transform: rotate(45deg) translateY(-14px); }
  100% { transform: rotate(45deg) translateY(0px); }
}

@media (max-width: 980px) {
  #home {
    grid-template-columns: 1fr !important;
  }

  .hero-visual {
    min-height: 420px;
    order: -1;
  }

  .hero-rings {
    width: 420px;
    height: 420px;
  }

  .hero-core {
    width: 220px;
    height: 220px;
  }

  .hero-pulse {
    width: 500px;
    height: 500px;
  }

  .hero-data {
    display: none;
  }
}