/* public/css/style.css - Неоновые стили */

:root {
  --primary-neon: #00ffff;
  --secondary-neon: #ff00ff;
  --accent-neon: #00ff00;
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-glow: rgba(0, 255, 255, 0.3);
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  background-image: 
    radial-gradient(ellipse at top, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(255, 0, 255, 0.1) 0%, transparent 50%);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background: linear-gradient(180deg, rgba(18, 18, 26, 0.95) 0%, rgba(10, 10, 15, 0.9) 100%);
  border-bottom: 1px solid var(--border-glow);
  padding: 15px 0;
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.logo {
  font-size: 32px;
  font-weight: bold;
  color: var(--primary-neon);
  text-decoration: none;
  text-shadow: 0 0 10px var(--primary-neon), 0 0 20px var(--primary-neon);
  animation: neonPulse 2s ease-in-out infinite;
}

@keyframes neonPulse {
  0%, 100% { text-shadow: 0 0 10px var(--primary-neon), 0 0 20px var(--primary-neon); }
  50% { text-shadow: 0 0 20px var(--primary-neon), 0 0 40px var(--primary-neon), 0 0 60px var(--primary-neon); }
}

.nav {
  display: flex;
  align-items: center;
  gap: 25px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-primary);
  text-decoration: none;
  padding: 8px 15px;
  border-radius: 5px;
  transition: all 0.3s ease;
  position: relative;
}

.nav a:hover {
  color: var(--primary-neon);
  text-shadow: 0 0 10px var(--primary-neon);
}

.nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-neon);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav a:hover::before {
  width: 100%;
  box-shadow: 0 0 10px var(--primary-neon);
}

.search-form {
  display: flex;
  gap: 5px;
}

.search-input {
  padding: 10px 15px;
  border: 1px solid var(--border-glow);
  border-radius: 5px;
  font-size: 14px;
  background: var(--bg-card);
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
}

.search-input:focus {
  border-color: var(--primary-neon);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.search-form button {
  padding: 10px 20px;
  background: transparent;
  color: var(--primary-neon);
  border: 1px solid var(--primary-neon);
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: bold;
}

.search-form button:hover {
  background: var(--primary-neon);
  color: var(--bg-dark);
  box-shadow: 0 0 20px var(--primary-neon);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 15px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 25px;
  text-decoration: none;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: bold;
  font-size: 14px;
  border: none;
}

.btn-primary {
  background: transparent;
  color: var(--primary-neon);
  border: 2px solid var(--primary-neon);
}

.btn-primary:hover {
  background: var(--primary-neon);
  color: var(--bg-dark);
  box-shadow: 0 0 20px var(--primary-neon), 0 0 40px var(--primary-neon);
}

.btn-block {
  display: block;
  width: 100%;
}

.btn-small {
  padding: 5px 15px;
  font-size: 12px;
}

.btn-danger {
  background: transparent;
  color: #ff4444;
  border: 1px solid #ff4444;
}

.btn-danger:hover {
  background: #ff4444;
  color: var(--bg-dark);
  box-shadow: 0 0 15px #ff4444;
}

.btn-admin {
  background: transparent;
  color: var(--accent-neon);
  border: 1px solid var(--accent-neon);
}

.btn-admin:hover {
  background: var(--accent-neon);
  color: var(--bg-dark);
  box-shadow: 0 0 20px var(--accent-neon);
}

.btn-logout {
  background: transparent;
  color: var(--secondary-neon);
  border: 1px solid var(--secondary-neon);
}

.btn-logout:hover {
  background: var(--secondary-neon);
  color: var(--bg-dark);
  box-shadow: 0 0 20px var(--secondary-neon);
}

.btn-large {
  padding: 15px 40px;
  font-size: 18px;
}

/* Main */
.main {
  min-height: calc(100vh - 200px);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, rgba(0, 255, 255, 0.1) 0%, rgba(255, 0, 255, 0.1) 100%);
  padding: 100px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-glow);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 255, 255, 0.03) 2px,
      rgba(0, 255, 255, 0.03) 4px
    );
  animation: scanlines 10s linear infinite;
}

@keyframes scanlines {
  0% { transform: translateY(0); }
  100% { transform: translateY(100px); }
}

.hero h1 {
  font-size: 56px;
  margin-bottom: 20px;
  color: var(--primary-neon);
  text-shadow: 0 0 20px var(--primary-neon), 0 0 40px var(--primary-neon);
  animation: neonGlow 3s ease-in-out infinite;
}

@keyframes neonGlow {
  0%, 100% { text-shadow: 0 0 20px var(--primary-neon), 0 0 40px var(--primary-neon); }
  50% { text-shadow: 0 0 30px var(--primary-neon), 0 0 60px var(--primary-neon), 0 0 80px var(--primary-neon); }
}

.hero p {
  font-size: 22px;
  margin-bottom: 30px;
  color: var(--text-secondary);
}

.hero-search {
  max-width: 600px;
  margin: 0 auto;
}

.hero-search form {
  display: flex;
  gap: 10px;
}

.hero-search-input {
  flex: 1;
  padding: 15px 25px;
  border: 2px solid var(--border-glow);
  border-radius: 50px;
  font-size: 16px;
  background: var(--bg-card);
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
}

.hero-search-input:focus {
  border-color: var(--primary-neon);
  box-shadow: 0 0 25px rgba(0, 255, 255, 0.4);
}

/* Sections */
.page-header {
  background: linear-gradient(180deg, rgba(18, 18, 26, 0.8) 0%, transparent 100%);
  padding: 50px 0;
  text-align: center;
}

.page-header h1 {
  margin-bottom: 10px;
  color: var(--primary-neon);
  text-shadow: 0 0 15px var(--primary-neon);
}

.content-section {
  padding: 50px 0;
}

/* Grid */
.classes-section,
.features-section {
  padding: 60px 0;
}

.classes-section h2,
.features-section h2 {
  text-align: center;
  margin-bottom: 40px;
  color: var(--secondary-neon);
  text-shadow: 0 0 15px var(--secondary-neon);
  font-size: 32px;
}

.classes-grid,
.features-grid,
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 25px;
}

.class-card,
.subject-card,
.feature-card {
  background: var(--bg-card);
  padding: 30px;
  border-radius: 15px;
  text-align: center;
  text-decoration: none;
  color: var(--text-primary);
  border: 1px solid var(--border-glow);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.class-card::before,
.subject-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.1), transparent);
  transition: all 0.5s ease;
}

.class-card:hover::before,
.subject-card:hover::before {
  left: 100%;
}

.class-card:hover,
.subject-card:hover,
.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-neon);
  box-shadow: 0 0 30px rgba(0, 255, 255, 0.3), 0 10px 40px rgba(0, 0, 0, 0.5);
}

.class-card h3,
.subject-card h3,
.feature-card h3 {
  color: var(--primary-neon);
  text-shadow: 0 0 10px var(--primary-neon);
}

.class-card .arrow,
.subject-card .arrow {
  font-size: 28px;
  color: var(--primary-neon);
  text-shadow: 0 0 10px var(--primary-neon);
}

/* Features */
.feature-card {
  border-color: rgba(255, 0, 255, 0.3);
}

.feature-card:hover {
  border-color: var(--secondary-neon);
  box-shadow: 0 0 30px rgba(255, 0, 255, 0.3), 0 10px 40px rgba(0, 0, 0, 0.5);
}

.feature-card h3 {
  color: var(--secondary-neon);
  text-shadow: 0 0 10px var(--secondary-neon);
}

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

/* Tasks */
.tasks-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.task-item {
  background: var(--bg-card);
  padding: 25px;
  border: 1px solid var(--border-glow);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s ease;
}

.task-item:hover {
  border-color: var(--primary-neon);
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
  transform: translateX(10px);
}

.task-item h3 {
  color: var(--primary-neon);
  margin-bottom: 8px;
  text-shadow: 0 0 8px var(--primary-neon);
}

.task-item p {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 600px;
}

.task-item .arrow {
  font-size: 28px;
  color: var(--primary-neon);
  text-shadow: 0 0 10px var(--primary-neon);
}

.task-meta,
.class-badge {
  display: inline-block;
  background: rgba(0, 255, 255, 0.1);
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 14px;
  color: var(--primary-neon);
  border: 1px solid var(--border-glow);
}

/* Task Detail */
.task-detail {
  max-width: 800px;
  margin: 0 auto;
}

.task-condition,
.task-solution {
  background: var(--bg-card);
  padding: 35px;
  border: 1px solid var(--border-glow);
  border-radius: 15px;
  margin-bottom: 30px;
}

.task-condition h2,
.task-solution h2 {
  color: var(--secondary-neon);
  text-shadow: 0 0 10px var(--secondary-neon);
  margin-bottom: 20px;
}

.condition-text,
.solution-text {
  line-height: 1.8;
  white-space: pre-wrap;
  color: var(--text-primary);
}

.show-solution {
  text-align: center;
  margin: 40px 0;
}

/* Admin */
.admin-sections {
  display: grid;
  gap: 40px;
}

.admin-section {
  background: var(--bg-card);
  padding: 35px;
  border: 1px solid var(--border-glow);
  border-radius: 15px;
}

.admin-section h2 {
  margin-bottom: 25px;
  color: var(--accent-neon);
  text-shadow: 0 0 10px var(--accent-neon);
}

.admin-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 25px;
}

.admin-form input,
.admin-form select,
.admin-form textarea {
  flex: 1;
  min-width: 150px;
  padding: 12px;
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  font-size: 14px;
  background: var(--bg-dark);
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
}

.admin-form input:focus,
.admin-form select:focus,
.admin-form textarea:focus {
  border-color: var(--primary-neon);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
}

.admin-list {
  list-style: none;
}

.admin-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  border-bottom: 1px solid var(--border-glow);
}

.admin-list li:last-child {
  border-bottom: none;
}

/* Auth */
.auth-form-container {
  max-width: 450px;
  margin: 50px auto;
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  box-shadow: 0 0 40px rgba(0, 255, 255, 0.1);
}

.auth-form {
  margin-bottom: 25px;
}

.form-group {
  margin-bottom: 25px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--primary-neon);
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  font-size: 14px;
  background: var(--bg-dark);
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
}

.form-group input:focus {
  border-color: var(--primary-neon);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.auth-link {
  text-align: center;
  margin-top: 25px;
  color: var(--text-secondary);
}

.auth-link a {
  color: var(--primary-neon);
  text-decoration: none;
}

.auth-link a:hover {
  text-shadow: 0 0 10px var(--primary-neon);
}

/* Alerts */
.alert {
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.alert-error {
  background: rgba(255, 68, 68, 0.1);
  color: #ff4444;
  border: 1px solid rgba(255, 68, 68, 0.3);
}

/* Back */
.back-link {
  margin-top: 35px;
}

.back-link a {
  color: var(--primary-neon);
  text-decoration: none;
  transition: all 0.3s ease;
}

.back-link a:hover {
  text-shadow: 0 0 15px var(--primary-neon);
}

/* Footer */
.footer {
  background: linear-gradient(0deg, rgba(18, 18, 26, 0.95) 0%, rgba(10, 10, 15, 0.9) 100%);
  border-top: 1px solid var(--border-glow);
  padding: 30px 0;
  text-align: center;
  margin-top: 60px;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    text-align: center;
  }
  
  .nav {
    flex-direction: column;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .hero-search form {
    flex-direction: column;
  }
  
  .class-card,
  .subject-card {
    padding: 20px;
  }
}