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

html, body {
  width: 100%;
  min-height: 100vh;
  background-color: #ffffff;
  color: #000000;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.landing-container {
  width: 100%;
  max-width: 800px;
  padding: 48px 24px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.site-title {
  font-size: 54px;
  font-weight: 900;
  letter-spacing: 4px;
  text-transform: lowercase;
  color: #000000;
  margin-bottom: 6px;
  line-height: 1;
}

.site-tagline {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #555555;
  margin-bottom: 28px;
}

.canvas-wrap {
  width: 100%;
  max-width: 720px;
  height: 240px;
  border: 2px solid #000000;
  box-shadow: 4px 4px 0px #000000;
  background: #ffffff;
  margin-bottom: 32px;
  overflow: hidden;
  position: relative;
}

#simCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.nav-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
  max-width: 320px;
  margin-bottom: 44px;
}

.action-btn {
  display: block;
  width: 100%;
  text-align: center;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #000000;
  background: #ffffff;
  border: 2px solid #000000;
  padding: 13px 20px;
  box-shadow: 3px 3px 0px #000000;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background-color 0.1s ease;
}

.action-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px #000000;
}

.action-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0px #000000;
  background: #f0f0f0;
}

.story-section {
  width: 100%;
  max-width: 620px;
  text-align: left;
  border-top: 2px solid #000000;
  padding-top: 32px;
  margin-bottom: 36px;
}

.story-text {
  font-size: 15px;
  line-height: 1.75;
  color: #222222;
  margin-bottom: 16px;
}

.book-note {
  font-size: 14px;
  line-height: 1.6;
  color: #333333;
  background: #f7f7f7;
  border-left: 3px solid #000000;
  padding: 12px 18px;
  margin-top: 20px;
}

.book-note strong {
  font-weight: 800;
  color: #000000;
}

.site-footer {
  font-size: 12px;
  font-weight: 600;
  color: #888888;
  letter-spacing: 1px;
  margin-top: auto;
  padding-bottom: 24px;
}

@media (max-width: 600px) {
  .site-title {
    font-size: 40px;
  }
  .site-tagline {
    font-size: 13px;
    letter-spacing: 1.5px;
  }
  .canvas-wrap {
    height: 190px;
  }
  .action-btn {
    font-size: 18px;
    padding: 10px 16px;
  }
}