/* Minimal and pleasant design for Space Time Cafe */
:root {
  --primary-dark: #0a0a0a;
  --primary-darker: #050505;
  --secondary-dark: #1a1a1a;
  --accent: #8a6de9;
  --accent-light: #a78ef5;
  --text-primary: #f0f0f0;
  --text-secondary: #b0b0b0;
  --border-radius: 8px;
  --transition: all 0.3s ease;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.25);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--primary-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  padding-bottom: 2rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background-color: var(--primary-darker);
  padding: 1.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.header-content h1 {
  font-weight: 600;
  font-size: 1.8rem;
  letter-spacing: -0.5px;
  margin-bottom: 0.25rem;
}

.header-content h1 i {
  color: var(--accent);
  margin-right: 0.5rem;
}

.header-content p {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 400;
}

/* Main content */
main {
  padding: 2rem 0;
}

.intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.intro h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.intro p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.youtube-link {
  margin: 1.5rem 0;
}

.youtube-link a {
  display: inline-flex;
  align-items: center;
  background-color: #ff0000;
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.youtube-link a:hover {
  background-color: #cc0000;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.youtube-link a i {
  margin-right: 0.5rem;
}

/* Tabs */
.tabs {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tab-button {
  background: none;
  border: none;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  outline: none;
}

.tab-button:hover {
  color: var(--text-primary);
}

.tab-button.active {
  color: var(--accent);
}

.tab-button.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--accent);
  border-radius: 3px 3px 0 0;
}

/* Tab content */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Filter controls */
.filter-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.search-input {
  padding: 0.75rem 1.25rem;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background-color: var(--secondary-dark);
  color: var(--text-primary);
  font-size: 1rem;
  width: 100%;
  max-width: 300px;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(138, 109, 233, 0.2);
}

.search-input::placeholder {
  color: var(--text-secondary);
}

.sort-select {
  padding: 0.75rem 1.25rem;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background-color: var(--secondary-dark);
  color: var(--text-primary);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
  padding-right: 3rem;
}

.sort-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(138, 109, 233, 0.2);
}

/* Video grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.75rem;
}

.video-card {
  background-color: var(--secondary-dark);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(138, 109, 233, 0.3);
}

.video-thumbnail {
  position: relative;
  width: 100%;
  height: 160px;
  overflow: hidden;
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.video-card:hover .video-thumbnail img {
  transform: scale(1.05);
}

.video-duration {
  position: absolute;
  bottom: 0.5rem;
  right: 0.5rem;
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.video-info {
  padding: 1.25rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.video-title {
  font-size: 1rem;
  font-weight: 500;
  margin: 0 0 1rem;
  line-height: 1.4;
  flex-grow: 1;
}

.video-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.video-card a {
  text-decoration: none;
  color: inherit;
  display: block;
  height: 100%;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 0 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header-content h1 {
    font-size: 1.5rem;
  }
  
  .intro h2 {
    font-size: 1.5rem;
  }
  
  .tabs {
    flex-direction: column;
    align-items: center;
    border-bottom: none;
  }
  
  .tab-button {
    width: 100%;
    max-width: 300px;
    text-align: center;
    margin-bottom: 0.5rem;
  }
  
  .filter-controls {
    flex-direction: column;
    align-items: center;
  }
  
  .search-input {
    max-width: 100%;
  }
  
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .header-content h1 {
    font-size: 1.3rem;
  }
  
  .intro h2 {
    font-size: 1.3rem;
  }
  
  .video-grid {
    grid-template-columns: 1fr;
  }
  
  .video-thumbnail {
    height: 180px;
  }
  
  .tab-button {
    padding: 0.75rem 1rem;
    font-size: 1rem;
  }
}