:root {
  --bg: #0a0d13;
  --bg-alt: #0d1119;
  --surface: #12161f;
  --surface-border: #1f2532;
  --text: #eef1f6;
  --text-muted: #8b93a3;
  --accent: #00e0b8;
  --accent-2: #7c6bff;
  --danger: #ff6b6b;
  --danger-bg: rgba(255, 107, 107, 0.1);
  --ok: #00e0b8;
  --ok-bg: rgba(0, 224, 184, 0.1);
  --radius-md: 14px;
  --radius-lg: 22px;
  --max-width: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", system-ui, Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  margin: 0 0 14px;
  font-weight: 750;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.4rem, 6vw, 4rem); }
h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }

p { color: var(--text-muted); margin: 0 0 16px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

/* Reveal-on-scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in-view { opacity: 1; transform: none; }

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(10, 13, 19, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--surface-border);
}
.topbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.topbar nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.topbar nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  transition: color .15s ease;
}
.topbar nav a:hover { color: var(--text); }
.nav-cta {
  color: var(--bg) !important;
  background: var(--accent);
  padding: 8px 16px;
  border-radius: 999px;
}
.nav-cta:hover { color: var(--bg) !important; opacity: .9; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s ease, opacity .15s ease, background .15s ease, border-color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #061013;
  box-shadow: 0 8px 24px rgba(0, 224, 184, 0.18);
}
.btn-primary:hover { opacity: .92; }
.btn-ghost {
  background: transparent;
  border-color: var(--surface-border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 96px;
}
.hero-glow {
  position: absolute;
  top: -220px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 620px;
  background: radial-gradient(closest-side, rgba(0, 224, 184, 0.20), rgba(124, 107, 255, 0.10) 55%, transparent 75%);
  filter: blur(10px);
  pointer-events: none;
}
.hero-inner { position: relative; }
.hero-lead {
  max-width: 620px;
  font-size: 1.1rem;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; }

/* Sections */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); }
.section-lead { max-width: 640px; font-size: 1.05rem; }

/* Services grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color .2s ease, transform .2s ease;
}
.card:hover { border-color: rgba(0, 224, 184, 0.35); transform: translateY(-2px); }
.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(0, 224, 184, 0.1);
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 16px;
}
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; font-size: 0.95rem; }

/* About */
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.tag {
  border: 1px solid var(--surface-border);
  background: var(--surface);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 650;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.contact-email {
  display: inline-block;
  margin-top: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 224, 184, 0.4);
  padding-bottom: 2px;
}
.contact-form {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: grid;
  gap: 18px;
}
.contact-form label {
  display: block;
  font-weight: 650;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 8px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--surface-border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.contact-form textarea { resize: vertical; }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 224, 184, 0.15);
}
.contact-form .btn { justify-self: start; }
.hp-field { position: absolute; left: -9999px; opacity: 0; }

.form-alert {
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 0.9rem;
  border: 1px solid transparent;
}
.form-alert-ok { background: var(--ok-bg); border-color: rgba(0, 224, 184, 0.35); color: var(--ok); }
.form-alert-err { background: var(--danger-bg); border-color: rgba(255, 107, 107, 0.35); color: var(--danger); }
.form-alert-err a { color: inherit; text-decoration: underline; }

/* Footer */
.footer {
  border-top: 1px solid var(--surface-border);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.88rem;
}
.footer a { color: var(--text-muted); text-decoration: none; }
.footer a:hover { color: var(--accent); }

@media (max-width: 860px) {
  .card-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 720px) {
  .topbar nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: 14px;
    padding: 10px;
    margin-top: 8px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
  }
  .topbar nav.open { display: flex; }
  .topbar nav a { padding: 10px 12px; border-radius: 8px; }
  .topbar nav a:hover { background: rgba(255,255,255,0.04); }
  .nav-cta { text-align: center; }
  .nav-toggle { display: inline-flex; }
  .topbar { position: sticky; }
  .hero { padding: 96px 0 64px; }
  .section { padding: 64px 0; }
}