/* === Цветовая палитра по умолчанию (Light) === */
:root {
  --bg: #f9f9f9;
  --text: #222;
  --accent: #ff6f61;
  --accent-hover: #d94a3e;
  --card-bg: #ffffff;
  --card-shadow: rgba(0, 0, 0, 0.1);
}

/* === Темная тема === */
body.dark-mode {
  --bg: #111;
  --text: #eee;
  --accent: #ff4081;
  --accent-hover: #ff79c6;
  --card-bg: #1a1a1a;
  --card-shadow: rgba(255, 255, 255, 0.05);
}

/* === Неоновая тема === */
body.neon-mode {
  --bg: #000018;
  --text: #39ff14;
  --accent: #00fff7;
  --accent-hover: #ff00f7;
  --card-bg: rgba(0, 0, 0, 0.6);
  --card-shadow: 0 0 15px rgba(0, 255, 255, 0.4);
}

/* === Общие стили === */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text);
  scroll-behavior: smooth;
  transition: background-color 0.5s ease, color 0.5s ease;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

a:hover {
  color: var(--accent-hover);
  text-shadow: 0 0 8px var(--accent-hover);
}

/* === Анимации === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

/* === Header === */
header {
  background-color: var(--card-bg);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px var(--card-shadow);
  animation: fadeInUp 1s ease both;
}

.logo {
  text-align: center;
}

.logo img {
  height: 60px;
}

/* === Навигация === */
nav {
  display: flex;
  justify-content: center;
  margin-top: 10px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 25px;
  padding: 0;
  margin: 0;
}

nav a {
  color: var(--text);
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 6px;
  position: relative;
  transition: all 0.3s ease;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 60%;
}

/* === Секции === */
section {
  max-width: 960px;
  margin: 60px auto;
  padding: 40px 25px;
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 10px 30px var(--card-shadow);
  animation: fadeInUp 0.8s ease both;
}

h1, h2, h3 {
  margin-top: 0;
  color: inherit;
}

/* === Проекты === */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 30px;
}

.project-card {
  background: var(--card-bg);
  border-radius: 10px;
  box-shadow: 0 5px 20px var(--card-shadow);
  padding: 20px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: fadeInUp 0.8s ease both;
}

.project-card:hover {
  transform: translateY(-8px);
  animation: pulse 1s infinite;
}

.project-card img {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 15px;
}

.project-card h3 {
  margin-bottom: 10px;
}

.project-card p {
  font-size: 0.95rem;
  color: var(--text);
}

.project-card a {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 18px;
  background-color: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-weight: bold;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.project-card a:hover {
  background-color: var(--accent-hover);
  transform: scale(1.05);
}

/* === Футер === */
footer {
  text-align: center;
  padding: 30px 15px;
  font-size: 0.9rem;
  color: var(--text);
  background-color: var(--card-bg);
  border-top: 1px solid var(--card-shadow);
}

/* === Соцсети === */
.social-links {
  text-align: center;
  margin-top: 20px;
}

.social-links a {
  margin: 0 12px;
  color: var(--accent);
  font-size: 1.3rem;
  transition: color 0.3s ease, transform 0.3s ease;
}

.social-links a:hover {
  color: var(--accent-hover);
  transform: scale(1.2);
}

/* === Переключатель темы === */
.theme-switcher {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 20px auto 0;
}

.theme-switcher button {
  background: var(--card-bg);
  color: var(--text);
  border: 2px solid var(--accent);
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

.theme-switcher button:hover {
  background: var(--accent);
  color: #fff;
  transform: scale(1.05);
}

/* === Адаптивность === */
@media (max-width: 600px) {
  nav ul {
    flex-direction: column;
    gap: 10px;
    align-items: center;
  }

  .project-card {
    padding: 15px;
  }

  section {
    margin: 20px 10px;
  }

  .theme-switcher {
    flex-direction: column;
  }
}