* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background-color: #ffffff;
  color: #111111;
  line-height: 1.6;
}

.hero {
  text-align: center;
  padding: 120px 20px 60px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.subtitle {
  font-size: 18px;
  color: #555;
  max-width: 800px;
  margin: 0 auto 15px;
}

.author {
  font-size: 16px;
  color: #888;
  margin-top: 10px;
}

.dashboard {
  display: flex;
  justify-content: center;
  padding: 40px 20px 80px;
}

.iframe-wrapper {
  width: 95%;
  max-width: 1400px;
  height: 800px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0,0,0,0.08);
}

iframe {
  width: 100%;
  height: 100%;
  border: none;
}

footer {
  text-align: center;
  padding: 40px;
  font-size: 14px;
  color: #999;
}

.tech-stack {
  text-align: center;
  margin: 60px 0 40px;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: #6e6e73;
  text-transform: uppercase;
}

.case-study {
  text-align: center;
  margin: 40px 0 80px;
}

.case-study a {
  text-decoration: none;
  font-size: 16px;
  color: #0071e3;
  font-weight: 500;
}

footer {
  text-align: center;
  padding: 60px 20px;
  font-size: 14px;
  color: #6e6e73;
}

footer .author {
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.impact {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin: 40px auto 60px;
  max-width: 1100px;
  text-align: center;
}

.impact-card h3 {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 6px;
}

.impact-card p {
  font-size: 14px;
  color: #6e6e73;
  max-width: 220px;
}

.architecture {
  text-align: center;
  margin: 60px 0;
}

.architecture button {
  background: none;
  border: none;
  font-size: 15px;
  color: #0071e3;
  cursor: pointer;
}

.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
}

.modal-content {
  background: #fff;
  padding: 40px;
  max-width: 500px;
  margin: 15% auto;
  text-align: center;
  font-size: 15px;
  color: #1d1d1f;
}

.close {
  position: absolute;
  right: 20px;
  top: 10px;
  cursor: pointer;
  font-size: 20px;
}