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

body {
  font-family: 'Source Sans 3', 'Helvetica Neue', Arial, sans-serif;
  color: #333;
  line-height: 1.6;
}

a {
  color: #1a6fb5;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

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

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
}

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

.logo img {
  height: 50px;
  width: auto;
}

.nav {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav a {
  color: #333;
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.nav a:hover {
  color: #1a6fb5;
  text-decoration: none;
}

.nav-login {
  background: #1a6fb5;
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 4px;
}

.nav-login:hover {
  background: #14577e;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  position: relative;
  background: url('assets/dsn-landing-page-image.webp') center/cover no-repeat;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
}

.hero-content {
  position: relative;
  text-align: center;
  padding: 80px 20px;
}

.hero h1 {
  color: #fff;
  font-size: 2.5rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  max-width: 700px;
  margin: 0 auto;
}

/* Intro */
.intro {
  padding: 60px 20px;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
}

.intro-text h2 {
  font-size: 1.8rem;
  margin-bottom: 12px;
  color: #222;
}

.intro-text h3 {
  font-size: 1.1rem;
  font-weight: 400;
  color: #555;
  margin-bottom: 24px;
  line-height: 1.5;
}

.intro-text p {
  margin-bottom: 16px;
  line-height: 1.7;
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  margin-bottom: 24px;
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.intro-sidebar {
  background: #f8f8f8;
  padding: 30px;
  border-radius: 8px;
}

.sidebar-logo {
  max-width: 200px;
  margin-bottom: 20px;
}

.intro-sidebar h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.intro-sidebar p {
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.intro-sidebar hr {
  border: none;
  border-top: 1px solid #ddd;
  margin: 24px 0;
}

.video-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.video-thumb {
  width: 100px;
  border-radius: 4px;
}

.video-link span {
  font-size: 0.95rem;
  font-weight: 600;
  color: #1a6fb5;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
  transition: background 0.2s;
}

.btn-primary {
  background: #1a6fb5;
  color: #fff;
}

.btn-primary:hover {
  background: #14577e;
  text-decoration: none;
}

.btn-large {
  padding: 16px 40px;
  font-size: 1.15rem;
}

/* Quote */
.quote-section {
  background: #f0f4f8;
  padding: 50px 20px;
  text-align: center;
}

.quote-section blockquote {
  font-size: 1.3rem;
  font-style: italic;
  color: #444;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

.quote-section blockquote span {
  font-size: 2rem;
  color: #1a6fb5;
  vertical-align: -0.2em;
}

/* Screenshots */
.screenshots {
  padding: 60px 20px;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.screenshot-card {
  text-align: center;
}

.screenshot-card img {
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
  margin-bottom: 12px;
}

.screenshot-card p {
  font-weight: 600;
  color: #444;
}

/* CTA */
.cta-section {
  background: #1a6fb5;
  color: #fff;
  text-align: center;
  padding: 60px 20px;
}

.cta-section h2 {
  font-size: 1.6rem;
  margin-bottom: 24px;
  line-height: 1.4;
}

.cta-section .btn-primary {
  background: #fff;
  color: #1a6fb5;
}

.cta-section .btn-primary:hover {
  background: #e8e8e8;
}

/* Footer */
.footer {
  background: #222;
  color: #ccc;
  padding: 40px 0 20px;
}

.footer a {
  color: #aad4f5;
}

.footer a:hover {
  color: #fff;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  text-align: center;
}

.footer-col h4 {
  color: #fff;
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.footer-col p {
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.footer-bottom {
  text-align: center;
  margin-top: 20px;
}

.footer-bottom hr {
  border: none;
  border-top: 1px solid #444;
  margin-bottom: 16px;
}

.footer-bottom p {
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.footer-logos {
  margin-top: 10px;
}

.footer-logos img {
  opacity: 0.8;
}

/* Mobile */
@media (max-width: 768px) {
  .nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 20px;
    border-bottom: 1px solid #e5e5e5;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .nav-open {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .intro-grid {
    grid-template-columns: 1fr;
  }

  .screenshot-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}