:root {
  --primary: #00ffd9;
  --primary-shadow: #00ffd940;
  --bg-dark: #0e0e1a;
  --bg-light: #1c1c2e;
  --text: #f0f0f0;
  --border: #333;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-dark: #f0f0f0;
    --bg-light: #ffffff;
    --text: #1a1a2e;
    --border: #ddd;
  }
}

body {
  font-family: "Segoe UI", "Arial", sans-serif;
  background: linear-gradient(145deg, var(--bg-dark), var(--bg-light));
  color: var(--text);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  text-align: center;
  padding: 70px 20px 30px;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 2.8em;
  color: var(--primary);
  margin-bottom: 10px;
  text-shadow: 0 0 8px var(--primary-shadow);
}

header p {
  font-size: 1.2em;
  max-width: 600px;
  margin: auto;
  opacity: 0.9;
}

.container {
  max-width: 880px;
  margin: 40px auto;
  background: var(--bg-light);
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 0 25px rgba(0, 255, 217, 0.05);
}

.section {
  margin-bottom: 40px;
}

.section h2 {
  font-size: 1.6em;
  color: var(--primary);
  margin-bottom: 12px;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.section p,
.section ul {
  font-size: 1.1em;
  line-height: 1.6;
  opacity: 0.95;
}

.section ul {
  padding-left: 25px;
  list-style: square;
}

.section ul li {
  margin-bottom: 0.5rem;
}

iframe {
  width: 100%;
  height: 720px;
  border: none;
  border-radius: 12px;
  margin-top: 20px;
  background: white;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
}

.cta-button {
  display: inline-block;
  background: var(--primary);
  color: var(--bg-dark);
  padding: 1rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  margin-top: 1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--primary-shadow);
}

.cta-button:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

@media (max-width: 600px) {
  iframe {
    height: 950px;
  }

  .container {
    padding: 20px;
    margin: 20px;
  }

  header h1 {
    font-size: 2.2em;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}