:root {
  --primary: #5b7cfa;
  --background: #ffffff;
  --text: #1f2933;
  --muted: #6b7280;
  --section-bg: #f8fafc;
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--background);
  line-height: 1.6;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  z-index: 100;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
}

nav a {
  margin-left: 20px;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
}

/* Buttons */
.btn-primary {
  background: var(--primary);
  color: white;
  padding: 10px 18px;
  border-radius: 6px;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 140px 0 100px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.hero p {
  color: var(--muted);
  max-width: 700px;
  margin: auto;
  margin-bottom: 30px;
}

/* Sections */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--section-bg);
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 30px;
}

/* Grid & Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: white;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

/* Tech */
.tech-list span {
  display: inline-block;
  margin: 8px;
  padding: 10px 16px;
  background: #eef2ff;
  border-radius: 20px;
  font-weight: 500;
}

/* Testimonials */
.testimonial {
  max-width: 700px;
}

.testimonial span {
  display: block;
  margin-top: 15px;
  color: var(--muted);
}

/* Contact */
.contact-form {
  max-width: 500px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-bottom: 15px;
  padding: 12px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
}

.contact-email {
  margin-top: 20px;
}

/* Footer */
footer {
  text-align: center;
  padding: 30px;
  border-top: 1px solid #e5e7eb;
  color: var(--muted);
}