:root {
  --primary-color: #1a252f;
  --accent-color: #d63031;
  --tech-badge: #0984e3;
  --world-badge: #00b894;
  --business-badge: #6c5ce7;
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --text-color: #2d3436;
  --border-color: #dfe6e9;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

/* Header */
.site-header {
  background-color: var(--primary-color);
  color: white;
  padding: 2rem 1rem;
  text-align: center;
  border-bottom: 4px solid var(--accent-color);
}

.site-header h1 {
  font-size: 2.2rem;
  letter-spacing: 2px;
}

.tagline {
  font-style: italic;
  font-size: 0.95rem;
  color: #b2bec3;
  margin-top: 5px;
}

.date-badge {
  display: inline-block;
  margin-top: 10px;
  background: rgba(255, 255, 255, 0.1);
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.85rem;
}

/* Navigation Filter Bar */
.navbar {
  display: flex;
  justify-content: center;
  gap: 10px;
  background: #ffffff;
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
}

.filter-btn {
  border: 1px solid var(--border-color);
  background: none;
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Container Layout */
.container {
  max-width: 1100px;
  margin: 20px auto;
  padding: 0 15px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

/* News Cards */
.news-grid {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.news-card {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.news-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  font-size: 0.75rem;
  font-weight: bold;
  color: white;
  border-radius: 4px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.badge.tech { background-color: var(--tech-badge); }
.badge.world { background-color: var(--world-badge); }
.badge.business { background-color: var(--business-badge); }

.news-card h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.card-footer {
  margin-top: 15px;
  display: flex;
  justify-content: flex-end;
}

.like-btn {
  background: #fff0f0;
  border: 1px solid #ffcccc;
  padding: 6px 12px;
  border-radius: 15px;
  cursor: pointer;
  font-size: 0.85rem;
}

/* Sidebar & Form */
.sidebar .form-card {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.form-card h3 {
  margin-bottom: 8px;
}

.form-card p {
  font-size: 0.85rem;
  color: #636e72;
  margin-bottom: 15px;
}

.form-group {
  margin-bottom: 12px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.9rem;
}

.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.error-msg {
  color: var(--accent-color);
  font-size: 0.75rem;
  display: block;
  margin-top: 3px;
  min-height: 14px;
}

.submit-btn {
  width: 100%;
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 10px;
  border-radius: 4px;
  font-weight: bold;
  cursor: pointer;
}

.submit-btn:hover {
  background: #2c3e50;
}

.success-message {
  margin-top: 10px;
  padding: 8px;
  background: #e8f8f5;
  color: #27ae60;
  border-radius: 4px;
  font-size: 0.85rem;
  text-align: center;
}

/* Submissions Queue */
.submissions-section {
  display: block;
  background: white;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.queue-list {
  list-style: none;
  margin-top: 10px;
}

.queue-item {
  padding: 10px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.queue-item:last-child {
  border-bottom: none;
}

.empty-queue {
  color: #b2bec3;
  font-style: italic;
  font-size: 0.85rem;
}

footer {
  text-align: center;
  padding: 20px;
  margin-top: 30px;
  background: var(--primary-color);
  color: white;
  font-size: 0.85rem;
}

/* Responsive Layout */
@media (max-width: 768px) {
  .container {
    grid-template-columns: 1fr;
  }
}