:root {
  --bg: #040506;
  --bg-alt: #0b0d0f;
  --card-bg: #101317;
  --border-subtle: #262a33;
  --text: #f5f5f5;
  --muted: #a2a7b3;
  --accent: #3ae68b;
  --accent-soft: rgba(58, 230, 139, 0.1);
  --danger: #ff4d4d;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --shadow-soft: 0 18px 60px rgba(0, 0, 0, 0.6);
  --max-width: 1120px;
}

/* RESET */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #131822 0, #020305 55%, #000 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

/* HEADER */
.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(4, 5, 6, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 18px;
}

.nav {
  display: flex;
  gap: 16px;
  align-items: center;
}

.nav a {
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--muted);
  border: 1px solid transparent;
  transition: 0.15s ease;
}

.nav a:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.02);
}

.nav-cta {
  border-color: rgba(58, 230, 139, 0.4) !important;
  background: rgba(58, 230, 139, 0.08);
  color: var(--accent) !important;
}

.burger {
  display: none;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 16px;
}

/* MOBILE NAV */
.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 0 16px 10px;
  background: rgba(4, 5, 6, 0.98);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.mobile-nav a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* HERO */
.hero {
  padding: 42px 0 40px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  align-items: stretch;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--muted);
  background: rgba(0, 0, 0, 0.4);
}

.hero h1 {
  margin-top: 16px;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.1;
}

.accent {
  color: var(--accent);
}

.hero-subtitle {
  margin-top: 12px;
  color: var(--muted);
  font-size: 15px;
  max-width: 560px;
}

.hero-actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

.hero-card {
  background: radial-gradient(circle at top left, rgba(58, 230, 139, 0.08), transparent 55%),
              var(--card-bg);
  border-radius: var(--radius-xl);
  padding: 20px 18px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hero-card h2 {
  font-size: 18px;
  margin: 0;
}

.hero-card ul {
  margin: 6px 0 0;
  padding-left: 18px;
  font-size: 14px;
  color: var(--muted);
}

.hero-card-note {
  margin-top: 8px;
  font-size: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px dashed rgba(255, 255, 255, 0.14);
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: 0.18s ease;
  white-space: nowrap;
}

.btn.primary {
  background: var(--accent);
  color: #021106;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(58, 230, 139, 0.35);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 36px rgba(58, 230, 139, 0.45);
}

.btn.ghost {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.3);
  color: var(--text);
}

.btn.ghost:hover {
  border-color: rgba(255, 255, 255, 0.35);
}

.btn.full-width {
  width: 100%;
}

/* SECTIONS */
.section {
  padding: 36px 0;
}

.section-alt {
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.02), transparent);
}

.section-title {
  font-size: 22px;
  margin: 0 0 10px;
}

.section-subtitle {
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--muted);
  max-width: 620px;
}

/* GRID / CARDS */
.grid {
  display: grid;
  gap: 16px;
}

.services-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 10px;
}

.cases-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 14px;
}

.stack-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 10px;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 16px 14px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.card-subtitle {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 14px;
}

.card-note {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
}

/* LISTS */
.list {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
  color: var(--muted);
}

.list li + li {
  margin-top: 4px;
}

/* PROCESS */
.process-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 10px;
}

.step {
  display: flex;
  gap: 10px;
  padding: 12px 12px;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.4);
}

.step-number {
  min-width: 26px;
  height: 26px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}

.step h3 {
  margin: 0 0 4px;
  font-size: 15px;
}

.step p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

/* CONTACT */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: flex-start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(1, 2, 3, 0.8);
  color: var(--text);
  padding: 8px 10px;
  font-family: inherit;
  font-size: 14px;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(58, 230, 139, 0.35);
}

.form-status {
  margin: 4px 0 0;
  font-size: 12px;
  min-height: 16px;
  color: var(--muted);
}

/* FOOTER */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 0 18px;
  background: rgba(0, 0, 0, 0.9);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
}

.footer-note {
  opacity: 0.8;
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-card {
    order: -1;
  }

  .services-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cases-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .stack-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .process-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .nav {
    display: none;
  }

  .burger {
    display: inline-flex;
  }

  .mobile-nav {
    display: none;
  }

  .mobile-nav.open {
    display: flex;
  }

  .hero {
    padding-top: 30px;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 28px 0;
  }

  .hero-inner {
    gap: 18px;
  }

  .card {
    padding: 12px 10px;
  }
}