/* Reset & Root Variables */
:root {
  --primary: #0f172a;
  --secondary: #1e293b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --text: #334155;
  --text-light: #64748b;
  --text-inverse: #f8fafc;
  --background: #f1f5f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --radius: 8px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

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

html {
  font-family: var(--font-sans);
  color: var(--text);
  background-color: var(--background);
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p {
  margin-bottom: 1.25rem;
  font-size: 1.125rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

a:hover {
  text-decoration: underline;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

/* Header & Nav */
.header {
  background-color: var(--surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 1rem 0;
}

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

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand:hover {
  text-decoration: none;
}

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

.nav-link {
  color: var(--text);
  font-weight: 500;
  font-size: 1rem;
}

.nav-link:hover {
  color: var(--accent);
  text-decoration: none;
}

/* Hero Section */
.hero {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: var(--text-inverse);
  padding: 8rem 0;
  text-align: center;
}

.hero h1 {
  color: var(--text-inverse);
  margin-bottom: 1.5rem;
}

.hero p {
  color: #cbd5e1;
  max-width: 800px;
  margin: 0 auto 2rem;
  font-size: 1.25rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  border: none;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: var(--text-inverse);
  text-decoration: none;
  transform: translateY(-1px);
}

/* Features/Services Structure */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.card {
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease;
  border: 1px solid var(--border);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card h3 {
  margin-bottom: 1rem;
}

/* Content Blocks for Long Form */
.content-block {
  background-color: var(--surface);
  border-radius: var(--radius);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
  border: 1px solid var(--border);
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Footer */
.footer {
  background-color: var(--primary);
  color: #cbd5e1;
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-heading {
  color: var(--text-inverse);
  font-size: 1.125rem;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: #94a3b8;
}

.footer-links a:hover {
  color: var(--text-inverse);
}

.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.875rem;
}

.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 3rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-8 { margin-top: 3rem; }

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

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero h1 {
    font-size: 2.25rem;
  }
  .section {
    padding: 3rem 0;
  }
}