/* Сбрасываем все отступы и границы */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Сброс цвета ссылок */
a:link,
a:visited {
  color: #fff;
}
a:hover {
  text-decoration: underline;
}

/* Основные стили */
body {
  font-family: 'Segoe UI', Tahoma, Verdana, sans-serif;
  background-color: #000;
  color: #fff;
  line-height: 1.6;
}

/* Header */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: #111;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
}
.logo {
  font-size: 1.5rem;
  font-weight: bold;
}
#menu-btn {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.75rem;
  cursor: pointer;
  display: none;
}
nav {
  display: flex;
  gap: 1.5rem;
}
nav a {
  padding: 0.5rem;
  transition: color 0.3s;
}
nav a.nav-link-active,
nav a:hover {
  color: #a855f7;
}

/* Main */
main {
  padding: 6rem 2rem 2rem;
}

/* Footer */
footer {
  background: #111;
  text-align: center;
  padding: 1.5rem;
  font-size: 0.875rem;
}

/* Photo */
.photo, .photo-lg {
  object-fit: cover;
  border-radius: 9999px;
  border: 4px solid #a855f7;
}
.photo {
  width: 10rem;
  height: 10rem;
  margin: 1rem 0;
  animation: pulse 2s infinite;
}
.photo-lg {
  width: 14rem;
  height: 14rem;
  margin-right: 2rem;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.typewriter {
  font-size: 2.5rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  border-right: 0.15em solid #a855f7;
  width: auto;          /* убираем фиксированную ширину */
  animation: blink-caret 0.75s step-end infinite;
}

@keyframes blink-caret {
  50% { border-color: transparent; }
}

/* Skills grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.skill-item {
  background: linear-gradient(135deg, #6b21a8, #d8b4fe);
  padding: 1rem;
  border-radius: 1rem;
  text-align: center;
  font-weight: 600;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
  transition: transform 0.3s;
}
.skill-item:hover {
  transform: translateY(-5px);
}

/* Algorithm list */
.algorithm-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}
.algorithm-item {
  background: #1f2937;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  transition: background 0.3s;
}
.algorithm-item:hover {
  background: #374151;
}

/* Contacts list */
.contact-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}
.contact-item {
  background: linear-gradient(135deg, #4f46e5, #818cf8);
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  text-align: center;
  transition: transform 0.3s;
}
.contact-item:hover {
  transform: translateY(-3px);
}

/* Fade-in */
.fade-in {
  opacity: 0;
  animation: fadeIn 1s ease-out forwards;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
  #menu-btn { display: block; }
  nav { display: none; flex-direction: column; gap: 1rem; }
  nav.open { display: flex; }
  header { flex-direction: column; align-items: flex-start; }
  main { padding: 8rem 1rem 2rem; }
  .skills-grid,
  .contact-list,
  .algorithm-list {
    display: flex;
    flex-direction: column;
  }
}