* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Inter, system-ui, -apple-system, Arial, sans-serif;
}

/* BODY */
body {
  background: #0b1220;
  color: #e5e7eb;
  line-height: 1.6;
}

/* HEADER */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 18px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;

  background: rgba(10, 15, 30, 0.7);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: #38bdf8;
  letter-spacing: 0.5px;
}

/* NAV */
nav a {
  color: #cbd5e1;
  margin-left: 18px;
  text-decoration: none;
  font-size: 14px;
  transition: 0.25s;
}

nav a:hover {
  color: #38bdf8;
}

/* HERO */
.hero {
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px 20px;

  background: radial-gradient(circle at top, #1d4ed8 0%, #0b1220 60%);
}

.hero h1 {
  font-size: 52px;
  font-weight: 800;
  max-width: 900px;
  line-height: 1.1;
  margin-bottom: 18px;
}

.hero p {
  font-size: 18px;
  max-width: 650px;
  opacity: 0.8;
}

/* BUTTON */
.btn {
  margin-top: 28px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #38bdf8, #0ea5e9);
  color: #0b1220;
  font-weight: 700;
  border-radius: 10px;
  text-decoration: none;
  display: inline-block;
  transition: 0.25s;
  border: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(56,189,248,0.25);
}

/* SECTIONS */
section {
  padding: 90px 60px;
}

/* HEADINGS */
h2 {
  font-size: 32px;
  text-align: center;
  margin-bottom: 40px;
  color: #f8fafc;
}

/* SERVICES GRID */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

/* CARD */
.card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  padding: 26px;
  border-radius: 14px;
  transition: 0.25s;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(56,189,248,0.4);
  background: rgba(255,255,255,0.06);
}

.card h3 {
  color: #38bdf8;
  margin-bottom: 10px;
}

/* ABOUT */
.about {
  text-align: center;
  max-width: 750px;
  margin: auto;
  opacity: 0.9;
}

/* FORM */
input, textarea {
  width: 320px;
  padding: 12px 14px;
  margin: 8px 0;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.03);
  color: white;
  outline: none;
}

textarea {
  height: 130px;
  resize: none;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 30px;
  font-size: 13px;
  opacity: 0.6;
  border-top: 1px solid rgba(255,255,255,0.06);
}

/* MOBILE */
@media (max-width: 768px) {
  header {
    padding: 14px 20px;
    flex-direction: column;
    gap: 10px;
  }

  .hero h1 {
    font-size: 34px;
  }

  section {
    padding: 60px 20px;
  }

  input, textarea {
    width: 100%;
  }
}