:root {
  --bg: #0f1115;
  --surface: #1a1d23;
  --surface-2: #23262e;
  --text: #e6e6e6;
  --muted: #a0a3a8;
  --accent: #5c7cfa;
  --accent-2: #22b8cf;
  --danger: #ff6b6b;
  --border: #2d3038;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }
.user-info {
  color: var(--muted);
  font-size: 14px;
}

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  min-height: calc(100vh - 60px - 40px);
}

.flash-messages {
  margin-bottom: 20px;
}
.flash {
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 8px;
  background: var(--surface-2);
  border-left: 4px solid var(--accent);
}
.flash.success { border-left-color: #20c997; }
.flash.error { border-left-color: var(--danger); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 10px; }

.posts-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: transform .15s, box-shadow .15s;
}
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.post-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.post-source {
  background: var(--surface-2);
  color: var(--accent-2);
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
}
.post-date {
  color: var(--muted);
  font-size: 12px;
}
.post-link {
  color: var(--muted);
  text-decoration: none;
}
.post-summary {
  color: var(--text);
  font-size: 14px;
  margin-bottom: 8px;
  line-height: 1.4;
}
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.tag {
  background: rgba(92,124,250,0.15);
  color: #a5b4fc;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
}
.tag.topic {
  background: rgba(34,184,207,0.12);
  color: #99e9f2;
}
.post-text {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  margin-bottom: 12px;
}

.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--muted);
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 20px;
}
.pagination-info { color: var(--muted); font-size: 14px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  cursor: pointer;
  transition: background .2s, transform .1s;
}
.btn:hover { background: #2c2f38; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}
.btn-primary:hover { background: #4a5ec9; }
.btn-secondary {
  background: var(--surface-2);
  border-color: var(--border);
}
.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; justify-content: center; margin-top: 10px; }

.auth-container {
  display: flex;
  justify-content: center;
  padding: 40px 10px;
}
.auth-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow);
}
.auth-form h2 { margin-top: 0; }
.auth-links { margin-top: 16px; text-align: center; color: var(--muted); font-size: 14px; }
.auth-links a { color: var(--accent); text-decoration: none; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; }
.form-control {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}
.form-control:focus {
  outline: none;
  border-color: var(--accent);
}

.post-detail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.post-detail h1 { margin-top: 8px; font-size: 20px; }
.post-actions { margin-top: 14px; }
.like-form { display: inline; }
.btn-like {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all .2s;
}
.btn-like.liked {
  color: var(--danger);
  border-color: var(--danger);
}
.likes-count {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
}
.post-nav { margin-top: 20px; }
.post-navigation { margin-top: 20px; }

.footer {
  text-align: center;
  padding: 16px;
  color: var(--muted);
  font-size: 12px;
}

.badge {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
}
.badge-admin { background: rgba(255,107,107,0.15); color: #ff8787; }
.badge-user { background: rgba(160,163,168,0.12); color: var(--muted); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin: 16px 0;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  gap: 12px;
  align-items: center;
}
.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(92,124,250,0.15);
  color: var(--accent);
}
.stat-info h3 { margin: 0; font-size: 20px; }
.stat-info p { margin: 0; color: var(--muted); font-size: 13px; }

.admin-sections { display: grid; gap: 18px; margin-top: 18px; }
.admin-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.admin-section h2 { font-size: 18px; margin-top: 0; }
.table-responsive { overflow-x: auto; }
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.admin-table th, .admin-table td {
  text-align: left;
  padding: 10px;
  border-bottom: 1px solid var(--border);
}
.admin-table th {
  background: var(--surface-2);
  color: var(--muted);
  font-weight: 600;
}
.admin-header { margin-bottom: 10px; }

@media (max-width: 600px) {
  .nav-links { gap: 10px; }
  .posts-list { grid-template-columns: 1fr; }
}