:root {
  /* Exact colors from your index.html screenshot */
  --bg-cream: #f5f1e8;
  --card-cream: #faf8f4;
  --dark-brown: #2d1810;
  --medium-brown: #4a2c1a;
  --light-brown: #6b4423;
  --accent-orange: #d4842a;
  --light-orange: #e09642;
  --text-dark: #2d1810;
  --text-medium: #4a2c1a;
  --text-light: #6b4423;
  --border-light: #e6dcc6;
  --shadow-brown: rgba(45, 24, 16, 0.1);
  --shadow-dark: rgba(45, 24, 16, 0.2);
}

body.dark-mode {
  --bg-cream: #1a1612;
  --card-cream: #2d2420;
  --dark-brown: #f5f1e8;
  --medium-brown: #e6dcc6;
  --light-brown: #d4c4a8;
  --text-dark: #f5f1e8;
  --text-medium: #e6dcc6;
  --text-light: #d4c4a8;
  --border-light: #4a3d2e;
  --shadow-brown: rgba(245, 241, 232, 0.1);
  --shadow-dark: rgba(245, 241, 232, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-cream);
  color: var(--text-dark);
  min-height: 100vh;
  transition: all 0.3s ease;
  line-height: 1.6;
}

/* Navigation */
nav {
  background: var(--dark-brown);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px var(--shadow-dark);
  border-bottom: 3px solid var(--accent-orange);
}

.logo {
  color: var(--accent-orange);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 1px;
}

.menu {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  margin: 0;
  padding: 0;
}

.menu a {
  color: var(--bg-cream);
  text-decoration: none;
  padding: 0.7rem 1.2rem;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.menu a:hover, .menu a.selected {
  background: var(--accent-orange);
  color: var(--dark-brown);
  border-color: var(--light-orange);
  transform: translateY(-2px);
}

.menu button {
  background: var(--accent-orange);
  border: 2px solid var(--light-orange);
  color: var(--dark-brown);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.7rem;
  border-radius: 50%;
  transition: all 0.3s ease;
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu button:hover {
  background: var(--light-orange);
  transform: scale(1.1);
}

.hamburger {
  display: none;
  cursor: pointer;
  z-index: 1001;
}

.hamburger div {
  width: 25px;
  height: 3px;
  background: var(--accent-orange);
  margin: 4px 0;
  border-radius: 2px;
  transition: 0.3s;
}

.hamburger.active div:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active div:nth-child(2) {
  opacity: 0;
}

.hamburger.active div:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

/* Main Content */
.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1.section-title, h2.section-title {
  color: var(--dark-brown);
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

h1.section-title::after, h2.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange), var(--light-orange));
  border-radius: 2px;
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.project-card {
  background: var(--card-cream);
  border: 2px solid var(--border-light);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 20px var(--shadow-brown);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 200px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(212, 132, 42, 0.05), transparent);
  transition: left 0.8s ease;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 30px var(--shadow-dark);
  border-color: var(--accent-orange);
}

.project-card:hover::before {
  left: 100%;
}

.project-title {
  font-size: 1.4rem;
  color: var(--dark-brown);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.project-desc {
  color: var(--text-medium);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.project-btn, .telegram-btn {
  background: var(--accent-orange);
  border: 2px solid var(--light-orange);
  color: var(--dark-brown);
  border-radius: 10px;
  padding: 0.8rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  white-space: nowrap;
}

.project-btn:hover, .telegram-btn:hover {
  background: var(--light-orange);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(212, 132, 42, 0.3);
}

.telegram-btn {
  background: #0088cc;
  border-color: #006699;
  color: white;
}

.telegram-btn:hover {
  background: #006699;
  box-shadow: 0 6px 15px rgba(0, 136, 204, 0.3);
}

/* Certificate Carousel */
.certificate-carousel-wrapper {
  position: relative;
  max-width: 700px;
  margin: 3rem auto;
  background: var(--card-cream);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 8px 30px var(--shadow-brown);
  border: 2px solid var(--border-light);
}

.certificate-slide {
  opacity: 0;
  position: absolute;
  width: 100%;
  transition: opacity 0.6s ease-in-out;
  pointer-events: none;
  top: 0;
  left: 0;
}

.certificate-slide.active {
  opacity: 1;
  position: relative;
  pointer-events: auto;
}

.certificate-img {
  width: 100%;
  border-radius: 12px;
  border: 3px solid var(--accent-orange);
  box-shadow: 0 6px 20px var(--shadow-brown);
  display: block;
  margin-bottom: 1.5rem;
}

.certificate-slide h3 {
  color: var(--dark-brown);
  font-weight: 700;
  font-size: 1.3rem;
  text-align: center;
  margin-bottom: 1.5rem;
  line-height: 1.3;
}

.certificate-slide ul {
  margin: 0 0 2rem 1.5rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-medium);
}

.certificate-slide ul li {
  margin-bottom: 0.7rem;
}

.certificate-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.certificate-btn {
  background: var(--accent-orange);
  border-radius: 10px;
  font-weight: 600;
  color: var(--dark-brown);
  text-decoration: none;
  border: 2px solid var(--light-orange);
  display: inline-block;
  padding: 0.8rem 1.5rem;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.certificate-btn:hover {
  background: var(--light-orange);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(212, 132, 42, 0.3);
}

#prevSlide, #nextSlide {
  width: 50px;
  height: 50px;
  background: var(--accent-orange);
  color: var(--dark-brown);
  font-size: 1.4rem;
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--light-orange);
  top: 45%;
  cursor: pointer;
  z-index: 10;
  box-shadow: 0 4px 15px var(--shadow-brown);
  font-weight: bold;
  transition: all 0.3s ease;
}

#prevSlide {
  left: -70px;
}

#nextSlide {
  right: -70px;
}

#prevSlide:hover, #nextSlide:hover {
  background: var(--light-orange);
  transform: scale(1.1);
  box-shadow: 0 6px 20px var(--shadow-dark);
}

.carousel-indicators {
  text-align: center;
  margin: 2rem 0 0 0;
}

.carousel-indicators button {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--border-light);
  opacity: 0.6;
  border: 2px solid var(--accent-orange);
  margin: 0 6px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.carousel-indicators button.active {
  background: var(--accent-orange);
  opacity: 1;
  transform: scale(1.2);
}

.carousel-indicators button:hover {
  opacity: 0.9;
  transform: scale(1.1);
}

/* Footer */
footer {
  background: var(--dark-brown);
  padding: 2rem 1rem;
  text-align: center;
  border-top: 3px solid var(--accent-orange);
  margin-top: 4rem;
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.footer-socials a {
  color: var(--accent-orange);
  padding: 1rem;
  border-radius: 50%;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--accent-orange);
}

.footer-socials a:hover {
  background: var(--accent-orange);
  color: var(--dark-brown);
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(212, 132, 42, 0.3);
}

footer small {
  color: var(--bg-cream);
  font-size: 0.9rem;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  nav {
    padding: 1rem;
  }
  
  .menu {
    flex-direction: column;
    position: fixed;
    top: 0;
    right: -100%;
    background: var(--dark-brown);
    width: 280px;
    height: 100vh;
    padding: 4rem 1.5rem 2rem 1.5rem;
    transition: right 0.4s ease;
    box-shadow: -10px 0 30px var(--shadow-dark);
    z-index: 999;
    justify-content: flex-start;
    gap: 1rem;
  }
  
  .menu.active {
    right: 0;
  }
  
  .menu li {
    width: 100%;
  }
  
  .menu a {
    display: block;
    padding: 1rem;
    font-size: 1.1rem;
    text-align: center;
    border-radius: 10px;
    width: 100%;
  }
  
  .menu button {
    margin: 1rem auto;
    display: block;
  }
  
  .hamburger {
    display: block;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .project-card {
    padding: 1.5rem;
  }
  
  .project-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .project-btn, .telegram-btn {
    justify-content: center;
    margin-bottom: 0.5rem;
  }
  
  .certificate-carousel-wrapper {
    max-width: 95vw;
    padding: 1.5rem;
  }
  
  #prevSlide, #nextSlide {
    width: 40px;
    height: 40px;
    left: -25px;
    right: -25px;
  }
  
  #nextSlide {
    left: auto;
    right: -25px;
  }
  
  .certificate-actions {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .menu {
    width: 250px;
    padding: 3.5rem 1rem 2rem 1rem;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .project-card {
    padding: 1rem;
    min-height: 180px;
  }
  
  .project-title {
    font-size: 1.2rem;
  }
  
  .certificate-slide h3 {
    font-size: 1.1rem;
  }
  
  #prevSlide, #nextSlide {
    display: none;
  }
  
  .certificate-carousel-wrapper {
    padding: 1rem;
  }
}