:root {
  --bg-dark: #1a000b;
  --bg-darker: #100d2c;
  --accent: #0064df;
  --highlight: #d5220f;
  --text: #f2f2f2;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

body {
  font-family: Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

section {
  padding: 2rem 1.5rem;
}

h2 {
  color: var(--accent);
  margin-bottom: 1rem;
}

.about-content {
  display: flex;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.about-text {
  flex: 1;
  min-width: 300px;
}

.about-text p {
  font-size: 1.1rem;
  line-height: 1.8;
}

.about-image {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
}

.profile-image {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 
              0 4px 16px rgba(43, 24, 26, 0.3),
              0 0 0 4px rgba(242, 242, 242, 0.1);
  transition: all 0.3s ease;
  border: 2px solid rgba(242, 242, 242, 0.1);
}

.profile-image:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 
              0 6px 20px rgba(43, 24, 26, 0.4),
              0 0 0 4px rgba(242, 242, 242, 0.2);
}

.projects-slider-container {
  position: relative;
  margin-top: 1rem;
  padding: 2rem 0;
  overflow: visible;
}

.projects-slider {
  display: flex;
  gap: 2rem;
  align-items: center;
  padding: 1rem 0;
  overflow: visible;
  transition: transform 0.4s ease;
  justify-content: flex-start;
}

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  box-sizing: border-box;
  background: none;
  width: 3rem;
  height: calc(3rem + 4px);
  color: var(--text);
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  z-index: 10;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.slider-btn:hover {
  background: none;
  transform: translateY(-50%) scale(1.1);
}

.slider-btn-prev {
  left: 5px;
}

.slider-btn-next {
  right: 5px;
}

.project-card {
  background: rgba(43, 24, 26, 0.1);
  border: 2px solid rgba(242, 242, 242, 0.1);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.4s ease;
  display: flex;
  flex-direction: column;
  width: 350px;
  min-height: 450px;
  flex-shrink: 0;
  opacity: 0.6;
  transform: scale(0.85);
  filter: blur(2px);
}

.project-card.active {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
  border-color: var(--accent);
}

.project-card.active:hover {
  transform: scale(1.02) translateY(-5px);
}

.project-card:hover {
  border-color: var(--accent);
  background: rgba(43, 24, 26, 0.2);
}

.project-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
  background: var(--bg-darker);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-header-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.project-card:hover .project-header-image {
  transform: scale(1.05);
}

.project-content {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.project-title {
  color: var(--text);
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.project-description {
  color: rgba(242, 242, 242, 0.8);
  line-height: 1.6;
  margin-bottom: 1rem;
  flex-grow: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag {
  background: var(--accent);
  color: var(--text);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

button {
  background: var(--accent);
  color: var(--text);
  padding: 0.8rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: var(--highlight);
}

.contact-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text);
  background: rgba(43, 24, 26, 0.1);
  border: 2px solid rgba(242, 242, 242, 0.1);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.contact-link:hover {
  background: rgba(43, 24, 26, 0.3);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.contact-link i {
  font-size: 1.5rem;
}

.contact-link span {
  font-weight: 500;
}

.collapsible-header {
  cursor: pointer;
  user-select: none;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  position: relative;
}

.collapsible-header:hover {
  border-color: var(--accent);
  transform: translateX(5px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.collapsible-header:active {
  transform: translateX(2px);
}

.collapsible-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.collapsible-chevron {
  font-size: 1rem;
  transition: all 0.3s ease;
  color: var(--accent);
  min-width: 1rem;
  opacity: 0.8;
}

.collapsible-chevron.rotated {
  transform: rotate(90deg);
}

.collapsible-header:hover .collapsible-chevron {
  transform: scale(1.2);
  color: var(--text);
  opacity: 1;
}

.collapsible-header:hover .collapsible-chevron.rotated {
  transform: rotate(90deg) scale(1.2);
}

.collapsible-title h2 {
  margin: 0;
  transition: color 0.3s ease;
}

.collapsible-header:hover .collapsible-title h2 {
  color: var(--text);
}

.collapsible-header::after {
  content: "click to toggle";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.75rem;
  color: var(--accent);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  font-style: italic;
}

.collapsible-header:hover::after {
  opacity: 0.6;
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, padding 0.4s ease-out;
}

.collapsible-content.expanded {
  max-height: 1000px;
  padding-top: 1rem;
}

.bio-text {
  margin-bottom: 1.5rem;
  line-height: 1.8;
  font-size: 1rem;
}

.bio-text:last-child {
  margin-bottom: 0;
}

footer {
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .about-content {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
  }
  
  .profile-image {
    width: 150px;
    height: 150px;
  }
  
  .contact-links {
    gap: 0.75rem;
    flex-wrap: wrap;
  }
  
  .contact-link {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
  
  .contact-link i {
    font-size: 1.2rem;
  }
  
  .contact-link span {
    font-size: 0.85rem;
  }
  
  .header-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  nav a {
    margin: 0 0.75rem;
  }
  
  .collapsible-header::after {
    display: none;
  }
  
  .collapsible-header {
    padding: 1rem;
  }
  
  .collapsible-header:hover {
    transform: none; 
  }

  .projects-slider-container {
    padding: 1rem 0;
    overflow: hidden;
    width: 100%;
  }
  
  .projects-slider {
    gap: 1rem;
    justify-content: flex-start;
  }
  
  .project-card {
    width: 320px;
    min-height: 500px;
    margin: 0;
    opacity: 0.2;
    transform: scale(1);
    filter: blur(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  
  .project-card.active {
    opacity: 1;
    transform: scale(1);
  }
  
  .project-image {
    height: 200px;
  }
  
  .project-content {
    padding: 1.25rem;
  }
  
  .project-title {
    font-size: 1.2rem;
  }
  
  .slider-btn {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .contact-links {
    gap: 0.5rem;
  }
  
  .contact-link {
    padding: 0.6rem 0.8rem;
    min-width: 0;
    flex: 1;
    max-width: 120px;
    justify-content: center;
  }
  
  .contact-link span {
    display: none;
  }
  
  .contact-link i {
    font-size: 1.4rem;
  }
  
  .projects-slider-container {
    padding: 0.5rem 0;
    overflow: hidden;
    width: 100%;
  }
  
  .projects-slider {
    gap: 0.5rem;
    justify-content: flex-start;
  }
  
  .project-card {
    width: 280px;
    min-height: 400px;
    margin: 0; 
    opacity: 0.1; 
    transform: scale(1);
    filter: blur(0);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  
  .project-card.active {
    opacity: 1;
    transform: scale(1);
  }
  
  .project-image {
    height: 200px;
  }
  
  .project-content {
    padding: 1rem;
  }
  
  .tech-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
  }
  
  .slider-btn {
    width: 2rem;
    height: 2rem;
    font-size: 0.9rem;
  }
}