:root {
  --primary: #5b61f6;
  --secondary: #8f7cf8;
  --accent: #ffd84d;
  --bg: #f6f7ff;
  --text: #1f2937;
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 1rem;
}

header, footer {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 1.2rem 0;
}

header a, footer a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}

h1 {
  font-size: 2.2rem;
  margin: 2.5rem 0 1rem;
}

h2 {
  font-size: 1.7rem;
  margin-top: 3rem;
}

h3 {
  font-size: 1.3rem;
  margin-top: 1.5rem;
}

.intro {
  max-width: 850px;
  margin-bottom: 2.2rem;
}

.cta {
  display: inline-block;
  margin: 1.6rem 0 2.4rem;
  background: linear-gradient(135deg, var(--accent), #ffb703);
  color: #000;
  padding: 1.15rem 2.6rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 800;
  box-shadow: 0 18px 35px rgba(255,216,77,.45);
  transition: transform .2s ease, box-shadow .2s ease;
}

.cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 25px 45px rgba(255,216,77,.6);
}

.seo-box {
  background: #fff;
  border-radius: 16px;
  padding: 1.6rem;
  box-shadow: 0 10px 25px rgba(0,0,0,.06);
  margin-bottom: 2.5rem;
}

.iframe-zone {
  background: #fff;
  border-radius: 18px;
  padding: 1rem;
  margin: 3rem 0;
  box-shadow: 0 12px 30px rgba(0,0,0,.08);
  min-height: 1200px;
}

.iframe-zone iframe {
  width: 100%;
  height: 100%;
  min-height: 1150px;
  border: none;
  border-radius: 14px;
}

details {
  background: #fff;
  border-radius: 16px;
  padding: 1.4rem;
  margin-bottom: 1.2rem;
  box-shadow: 0 8px 20px rgba(0,0,0,.05);
}

summary {
  cursor: pointer;
  font-weight: 700;
}