:root {
  --color-primary: #0a1628;
  --color-secondary: #1a2e4a;
  --color-tertiary: #1e3a5f;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-bg: #f8fafc;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-white: #ffffff;
  --font-main: 'Inter', sans-serif;
  --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);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  padding-top: 70px;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  line-height: 1.2;
}

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

a:hover {
  color: var(--color-accent-hover);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  background-color: var(--color-primary);
  color: var(--color-white);
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
}

.logo-icon {
  width: 24px;
  height: 24px;
  fill: var(--color-accent);
}

.nav {
  display: flex;
  gap: 30px;
}

.nav a {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav a:hover, .nav a.active {
  color: var(--color-white);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-tertiary) 100%);
  color: var(--color-white);
  padding: 100px 0;
  text-align: center;
}

.hero h1 {
  color: var(--color-white);
  font-size: 3rem;
  margin-bottom: 20px;
  font-weight: 800;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 40px;
  color: rgba(255, 255, 255, 0.9);
}

.btn {
  display: inline-block;
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 14px 28px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  transition: background-color 0.2s ease, transform 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-white {
  background-color: var(--color-white);
  color: var(--color-accent);
}

.btn-white:hover {
  background-color: #f1f5f9;
  color: var(--color-accent-hover);
}

/* Features */
.features {
  padding: 80px 0;
  background-color: var(--color-white);
}

.section-title {
  text-align: center;
  font-size: 2.25rem;
  margin-bottom: 50px;
  font-weight: 700;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-card {
  background-color: var(--color-bg);
  padding: 40px 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  border: 1px solid rgba(0,0,0,0.05);
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.feature-icon {
  width: 50px;
  height: 50px;
  margin: 0 auto 20px;
  background-color: rgba(37, 99, 235, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.5rem;
}

.feature-card h3 {
  margin-bottom: 15px;
  font-size: 1.25rem;
}

.feature-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* Use Cases */
.use-cases {
  padding: 80px 0;
  background-color: var(--color-bg);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.use-case-item {
  background-color: var(--color-white);
  padding: 30px 20px;
  border-radius: 8px;
  text-align: center;
  font-weight: 600;
  color: var(--color-secondary);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.use-case-icon {
  color: var(--color-accent);
}

/* CTA Banner */
.cta-banner {
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: 60px 0;
  text-align: center;
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: 20px;
}

/* Content Pages (About, Privacy, etc.) */
.page-header {
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: 60px 0;
  text-align: center;
}

.page-header h1 {
  color: var(--color-white);
  font-size: 2.5rem;
}

.page-content {
  padding: 60px 0;
  background-color: var(--color-white);
  min-height: calc(100vh - 350px);
}

.content-box {
  max-width: 800px;
  margin: 0 auto;
}

.content-box h2 {
  margin-top: 40px;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.content-box p {
  margin-bottom: 20px;
  color: var(--color-text-light);
}

.content-box ul {
  margin-bottom: 20px;
  padding-left: 20px;
  color: var(--color-text-light);
}

.content-box li {
  margin-bottom: 10px;
}

/* Contact Form */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 50px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info {
  background-color: var(--color-bg);
  padding: 40px;
  border-radius: 12px;
}

.contact-info h3 {
  margin-bottom: 20px;
}

.info-item {
  margin-bottom: 20px;
}

.info-item strong {
  display: block;
  color: var(--color-secondary);
  margin-bottom: 5px;
}

.contact-form {
  background-color: var(--color-white);
  padding: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.05);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--color-secondary);
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

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

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 30px;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--color-white);
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--color-primary);
    flex-direction: column;
    padding: 20px;
    gap: 15px;
    box-shadow: 0 10px 10px -5px rgba(0,0,0,0.1);
  }
  
  .nav.open {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}