/* Layout CSS */
.container {
  width: 100%;
  max-width: 120rem;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  transition: all var(--transition-speed) ease;
  border-bottom: 1px solid var(--nav-border);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text-primary);
}

.main-nav ul {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.8rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width var(--transition-speed) ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 2.4rem;
  height: 2rem;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-speed) ease;
}

section {
  padding: var(--spacing-xxl) 0;
}

.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
}

.hero-content {
  max-width: 70rem;
}

.hero h1 {
  font-size: 7.2rem;
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

.role-container {
  height: 4rem;
  margin-bottom: var(--spacing-lg);
  overflow: hidden;
}

.roles {
  display: flex;
  flex-direction: column;
  animation: roleChange 9s infinite;
}

.roles span {
  font-size: 3.2rem;
  font-weight: 500;
  color: var(--text-secondary);
  height: 4rem;
  display: flex;
  align-items: center;
}

.hero-description {
  font-size: 2rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
}

.section-title {
  font-size: 4rem;
  text-align: center;
  margin-bottom: var(--spacing-xxl);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 6rem;
  height: 3px;
  background-color: var(--accent);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.about-text p {
  font-size: 1.8rem;
  color: var(--text-secondary);
}

.skills h3 {
  margin-bottom: var(--spacing-lg);
}

.skill-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.skill {
  width: 100%;
}

.skill-name {
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  display: block;
}

.skill-bar {
  width: 100%;
  height: 0.8rem;
  background-color: var(--skill-bar-bg);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background-color: var(--skill-progress);
  border-radius: var(--border-radius-sm);
  transition: width 1.5s ease;
}

.filter-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(35rem, 1fr));
  gap: var(--spacing-xl);
}

.project-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.project-image {
  width: 100%;
  height: 22rem;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-speed) ease;
}

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

.project-details {
  padding: var(--spacing-lg);
}

.project-details h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

.project-details p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.project-tags {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.project-tags span {
  font-size: 1.2rem;
  padding: 0.4rem 0.8rem;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--border-radius-sm);
}

.project-link {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--accent);
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.contact-icon {
  width: 4.8rem;
  height: 4.8rem;
  background-color: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon span {
  font-size: 2.4rem;
  color: var(--text-primary);
}

.contact-text h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.contact-text p {
  color: var(--text-secondary);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.social-link {
  width: 4.8rem;
  height: 4.8rem;
  background-color: var(--bg-tertiary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-speed) ease;
}

.social-link:hover {
  background-color: var(--accent);
}

.social-link span {
  font-size: 2.4rem;
  color: var(--text-primary);
  transition: color var(--transition-speed) ease;
}

.social-link:hover span {
  color: var(--btn-primary-text);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-speed) ease;
}

.form-group input:focus,
.form-group textarea:focus {
  background-color: var(--bg-tertiary);
}

.footer {
  background-color: var(--bg-secondary);
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-content p {
  color: var(--text-tertiary);
  margin-bottom: 0;
}

.theme-toggle {
  position: fixed;
  bottom: 3rem;
  right: 3rem;
  z-index: 99;
}

#themeToggle {
  width: 5rem;
  height: 5rem;
  background-color: var(--card-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: background-color var(--transition-speed) ease;
}

.theme-toggle-icon {
  position: relative;
  width: 2.4rem;
  height: 2.4rem;
}