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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --border: #e5e7eb;
}

html {
  scroll-behavior: smooth;
}

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

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.3s;
}

/* Main Content */
main {
  padding-top: 70px;
}

section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

h1, h2, h3 {
  margin-bottom: 1rem;
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
}

/* Hero Section */
.hero {
  min-height: calc(100vh - 70px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: linear-gradient(135deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  max-width: 600px;
}

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  background: var(--primary);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* About Section */
.about {
  background: var(--bg-alt);
}

.about > p {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
  color: var(--text-light);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature {
  text-align: center;
  padding: 2rem;
  background: var(--bg);
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.feature h3 {
  color: var(--primary);
}

/* Services Section */
.service-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  padding: 2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card h3 {
  color: var(--primary);
}

.card p {
  color: var(--text-light);
}

/* Contact Section */
.contact {
  background: var(--bg-alt);
}

#contact-form {
  max-width: 500px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#contact-form input,
#contact-form textarea {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

#contact-form input:focus,
#contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
}

#contact-form button {
  align-self: flex-start;
}

/* Footer */
footer {
  padding: 2rem;
  text-align: center;
  background: var(--text);
  color: var(--bg);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    padding: 1rem 2rem;
    gap: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: none;
  }

  .nav-links.active {
    display: flex;
  }

  h1 {
    font-size: 2rem;
  }

  section {
    padding: 3rem 1rem;
  }
}