:root {
  --primary: #dc2626;
  --primary-dark: #b91c1c;
  --dark: #1a1a1a;
  --darker: #0d0d0d;
  --light: #f8fafc;
  --gray: #94a3b8;
  --dark-gray: #334155;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --admin: #8b5cf6;
}

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

body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  background-color: var(--darker);
  color: var(--light);
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.header {
  background-color: rgba(13, 13, 13, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--dark-gray);
  padding: 1rem 0;
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 0;
}

.logo span {
  color: var(--primary);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

nav a {
  color: var(--light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
  padding: 0.5rem 0.8rem;
  border-radius: 0.3rem;
}

nav a:hover, nav a.active {
  color: var(--primary);
  background-color: rgba(220, 38, 38, 0.1);
}

/* Main content */
.main-content {
  padding: 2rem 0;
  min-height: calc(100vh - 200px);
}

.page-title {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  text-align: center;
  color: var(--primary);
}

/* Forum header */
.forum-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.forum-stats {
  display: flex;
  gap: 1.5rem;
  background-color: var(--dark);
  padding: 0.8rem 1.2rem;
  border-radius: 0.5rem;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray);
}

/* Categories */
.forum-categories {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.forum-category {
  background-color: var(--dark);
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.category-header {
  background: linear-gradient(90deg, var(--primary-dark), var(--primary));
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.category-icon {
  font-size: 1.5rem;
}

.category-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.category-desc {
  margin-left: auto;
  color: rgba(255, 255, 255, 0.8);
}

/* Topics */
.topics-container {
  padding: 0.5rem;
}

.topic {
  display: flex;
  padding: 1.2rem;
  border-bottom: 1px solid var(--dark-gray);
  transition: background-color 0.2s;
}

.topic:last-child {
  border-bottom: none;
}

.topic:hover {
  background-color: rgba(255, 255, 255, 0.03);
}

.topic-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  margin-right: 1rem;
  flex-shrink: 0;
}

.topic-content {
  flex-grow: 1;
}

.topic-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--light);
  text-decoration: none;
  display: block;
}

.topic-title:hover {
  color: var(--primary);
}

.topic-meta {
  display: flex;
  gap: 1rem;
  color: var(--gray);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.topic-author {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.admin-badge {
  background-color: var(--admin);
  color: white;
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 0.3rem;
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

.topic-stats {
  display: flex;
  gap: 1.5rem;
  color: var(--gray);
  font-size: 0.9rem;
}

.topic-stat {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.topic-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: 0.4rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-size: 0.95rem;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background-color: rgba(220, 38, 38, 0.1);
}

.btn-success {
  background-color: var(--success);
  color: white;
}

.btn-danger {
  background-color: var(--danger);
  color: white;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
}

/* Login prompt */
.login-prompt {
  background-color: var(--dark);
  padding: 2rem;
  border-radius: 0.5rem;
  text-align: center;
  margin: 2rem 0;
}

.login-prompt p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

/* Footer */
.footer {
  background-color: var(--dark);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--dark-gray);
  margin-top: 3rem;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-content {
  background-color: var(--dark);
  width: 100%;
  max-width: 600px;
  border-radius: 0.5rem;
  padding: 2rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.5rem;
  color: var(--primary);
}

.close-modal {
  background: none;
  border: none;
  color: var(--gray);
  font-size: 1.5rem;
  cursor: pointer;
}

.close-modal:hover {
  color: var(--light);
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.8rem;
  border-radius: 0.4rem;
  border: 1px solid var(--dark-gray);
  background-color: var(--darker);
  color: var(--light);
  font-family: inherit;
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* Like button */
.like-btn {
  background: none;
  border: none;
  color: var(--gray);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.2s;
}

.like-btn:hover {
  color: var(--primary);
}

.like-btn.liked {
  color: var(--primary);
}

/* Admin actions */
.admin-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* Topic pinned */
.topic.pinned {
  background-color: rgba(245, 158, 11, 0.1);
  border-left: 4px solid var(--warning);
}

.pin-badge {
  background-color: var(--warning);
  color: white;
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 0.3rem;
  margin-left: 0.5rem;
}

/* Topic locked */
.topic.locked .topic-title::before {
  content: "🔒 ";
}

/* Loading spinner */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255,255,255,.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    gap: 1rem;
  }
  
  nav ul {
    gap: 0.8rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .forum-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .forum-stats {
    justify-content: center;
  }
  
  .topic {
    flex-direction: column;
  }
  
  .topic-avatar {
    margin-bottom: 0.8rem;
  }
}