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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
}

/* :root {
  --font-base: 1rem;
  --font-lg: 1.25rem;
  --font-xl: 1.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
} */

* {
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", sans-serif;
  font-size: var(--font-base);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  margin-bottom: var(--space-lg);
}

.section h2 {
  font-size: var(--font-xl);
  color: var(--primary-color);
  display: inline-block;
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--secondary-color);
  text-align: center;
  width: 100%;
}

.section h3 {
  font-size: var(--font-lg);
  text-align: left;
  margin-bottom: var(--space-sm);
}

p {
  font-size: var(--font-base);
  margin-bottom: var(--space-sm);
}

.paper-summary {
  background: rgba(52, 152, 219, 0.05);
  border-radius: 12px;
  padding: var(--space-lg);
  margin: var(--space-lg) auto;
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-sm);
  }
  .section h2 {
    font-size: 1.25rem;
    border-bottom: none;
  }
  .section h3 {
    font-size: 1rem;
  }
  p {
    font-size: 0.9rem;
  }
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem 2rem;
  border-top: none;
}

.section {
  margin-bottom: 4rem;
  padding-top: 2rem;
  border-top: none;
}

/* .section h2 {
  color: var(--primary-color);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--secondary-color);
  text-align: center;
}

.section h3 {
  text-align: center;
} */

.architecture-image-container {
  position: relative;
  margin: 2rem auto;
  width: 100%;
  max-width: 800px;
}

.architecture-image {
  width: 100%;
  cursor: pointer;
}

.zoom-icon {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  font-size: 1.2rem;
  transition: transform 0.2s, background-color 0.2s;
}

.zoom-icon:hover {
  transform: scale(1.1);
  background: rgba(0, 0, 0, 0.9);
}

/* Fullscreen modal for the architecture image */
.fullscreen-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.95);
  z-index: 9999;
}

.fullscreen-container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.fullscreen-overlay img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.close-fullscreen {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
  padding: 10px;
}

.paper-summary {
  max-width: 800px;
  width: 100%; /* so it’ll shrink on small screens */
  margin: 2rem auto; /* top/bottom 2rem, left/right auto → true centering */
  background: var(--light-bg);
  padding: 2rem;
  border-radius: 10px;
  /* margin: 2rem 0; */
}

.paper-summary h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.paper-summary p {
  margin-bottom: 1rem;
}

.key-points {
  list-style-type: none;
  margin: 1rem 0;
}

.key-points li {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  position: relative;
}

.key-points li:before {
  content: "•";
  color: var(--secondary-color);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* Mobile styles */
@media (max-width: 768px) {
  .main-content {
    padding: 6rem 1rem 1rem;
  }

  .section h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: none !important;
  }

  .architecture-image {
    max-width: 100%;
  }

  .paper-summary {
    padding: 1rem;
  }

  /* .paper-summary h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
  } */

  .key-points li {
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
  }

  footer {
    padding: 1.5rem 1rem;
    font-size: 0.8rem;
  }
}

/* .acknowledgement {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.acknowledgement p {
  margin-bottom: 1rem;
  color: #f0f0f0;
}

.acknowledgement-logo {
  height: 90px;
  width: auto;
  opacity: 0.8;
  transition: opacity 0.3s;
}

.acknowledgement-logo:hover {
  opacity: 1;
} */