/* Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #111827;
  background-color: #f9fafb;
  line-height: 1.6;
}

/* Typography */
h1, h2, h3 {
  color: #0f172a;
}

/* Header & Nav */
header {
  background-color: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #6366f1;
}

/* Buttons */
.btn {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: #6366f1;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #4f46e5;
}

.btn-secondary {
  background-color: #ffffff;
  color: #334155;
  border: 1px solid #cbd5e1;
}

.btn-secondary:hover {
  background-color: #f1f5f9;
}

.btn-large {
  padding: 0.8rem 1.6rem;
  font-size: 1.05rem;
}

.btn-full {
  width: 100%;
  margin-top: 1rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 5rem 1.5rem;
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  color: #ffffff;
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.35rem;
  max-width: 650px;
  margin: 0 auto 2rem auto;
  color: #c7d2fe;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Features Section */
.features {
  padding: 4rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 2.5rem;
}

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

.card {
  background-color: #ffffff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  border: 1px solid #e2e8f0;
}

.card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

/* Footer */
footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 3rem 1.5rem 1.5rem 1.5rem;
  margin-top: 3rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-info h3 {
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid #1e293b;
  text-align: center;
  font-size: 0.875rem;
}

/* Modal Window */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  justify-content: center;
  align-items: center;
}

.modal-content {
  background-color: #ffffff;
  padding: 2rem;
  border-radius: 12px;
  width: 90%;
  max-width: 480px;
  position: relative;
}

.close-btn {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: #64748b;
}

.modal form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.modal input, .modal textarea {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-family: inherit;
}