:root {
  --background-dark: #0d0d12;
  /* Almost Black */
  --background-card: #161c28;
  /* Very Dark Blue-Gray */
  --text-primary: #e0e0f0;
  /* Soft, Light Gray */
  --text-secondary: #a0a8b4;
  /* Muted Blue-Gray */
  --accent-color: #4a90e2;
  /* A vibrant, deep blue */
  --accent-hover: #3a7acb;
  /* Slightly darker blue for hover */
  --border-color: #2e3542;
  /* Dark border color */
  --error-color: #ff6b6b;
  /* Bright Red */
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background-dark);
  color: var(--text-primary);
  margin: 0;
  padding: 96px 72px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;

  @media (max-width: 768px) {
    padding: 48px;
  }
}

.container {
  max-width: 1200px;
  width: 100%;
  padding: 48px;
  background-color: var(--background-card);
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);

  @media (max-width: 768px) {
    padding: 48px 24px;
  }
}

h1 {
  font-size: 2.5rem;
  text-align: center;
  font-weight: 300;
  margin-bottom: 20px;
  margin-top: 0;
  color: var(--accent-color);
  letter-spacing: 1px;
  text-transform: uppercase;

  @media (max-width: 768px) {
    font-size: 1.75rem;
  }
}

/* --- Search Form & Platform Tabs --- */
.search-form {
  margin-bottom: 25px;
}

.platform-tabs {
  display: flex;
  margin-bottom: 0;

  @media (max-width: 500px) {
    width: 100%;
  }
}

.platform-tab {
  cursor: pointer;
  min-width: 130px;
  text-align: center;

  @media (max-width: 500px) {
    flex: 1;
  }
}

.platform-tab input[type="radio"] {
  display: none;
}

.platform-tab span {
  display: block;
  padding: 12px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--border-color);
  color: var(--text-secondary);
  transition: background-color 0.2s, color 0.2s;
}

.platform-tab:first-child span {
  border-radius: 4px 0 0 0;
}

.platform-tab:last-child span {
  border-radius: 0 4px 0 0;
}

.platform-tab input[type="radio"]:checked+span {
  background-color: var(--accent-color);
  color: #fff;
}

.platform-tab:hover span {
  background-color: var(--accent-hover);
  color: #fff;
}

.search-row {
  display: flex;
  align-items: stretch;
  gap: 12px;
}

.search-bar {
  flex-grow: 1;
  display: flex;
  background-color: #fff;
  border-radius: 0 8px 8px 8px;
}

.search-bar input[type="text"] {
  flex-grow: 1;
  min-width: 200px;
  padding: 16px 20px;
  border: none;
  background-color: transparent;
  color: #333;
  font-size: 1rem;
  border-radius: 0 8px 8px 8px;
}

.search-bar input[type="text"]::placeholder {
  color: #999;
}

.search-bar input[type="text"]:focus {
  outline: none;
}

.lookup-btn {
  padding: 16px 24px;
  border: 1px solid var(--accent-color);
  border-radius: 5px;
  background-color: transparent;
  color: var(--accent-color);
  font-weight: 500;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.lookup-btn:hover {
  background-color: var(--accent-color);
  color: #fff;
}

.lookup-btn:disabled {
  border-color: var(--border-color);
  color: var(--border-color);
  cursor: not-allowed;
}

.lookup-btn:disabled:hover {
  background-color: transparent;
  color: var(--border-color);
}

.error {
  background-color: var(--error-color);
  color: #fff;
  padding: 10px 15px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-weight: 500;
  text-align: center;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 5px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  background: none;
  border: none;
  padding: 10px 15px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.3s, border-bottom 0.3s;
  border-bottom: 2px solid transparent;
}

.tab-btn.active {
  color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
}

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

.tab {
  display: none;
}

.tab.active {
  display: block;
}

/* --- Video List --- */
.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  background-color: var(--background-dark);
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
  border: 1px solid var(--background-dark);
  transition: border-color 0.3s;
}

.row:hover {
  border-color: var(--border-color);
}

.idx {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-right: 20px;
  flex-shrink: 0;
}

.row>div:nth-child(2) {
  flex-grow: 1;
  min-width: 250px;
  overflow: hidden;
}

.title-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 500;
  text-align: left;
  padding: 0;
  margin-bottom: 5px;
  cursor: pointer;
  word-break: break-word;
}

.title-btn:hover {
  color: var(--accent-color);
}

.title-meta {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 100%;
}

.actions button,
.actions a {
  padding: 8px 12px;
  border-radius: 5px;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s;
  cursor: pointer;
  white-space: nowrap;
}

.embed-btn {
  background-color: var(--border-color);
  border: none;
  color: var(--text-primary);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.embed-btn:hover {
  background-color: var(--accent-color);
  color: #fff;
}

.actions a {
  background-color: transparent;
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.actions a:hover {
  background-color: var(--accent-color);
  color: #fff;
}

.preview {
  margin-left: 20px;
  width: 200px;
  height: 112px;
  flex-shrink: 0;
}

.preview iframe {
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 8px;
}

#load-more {
  display: block;
  width: 100%;
  padding: 15px;
  margin-top: 20px;
  background-color: var(--accent-color);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s;
}

#load-more:hover {
  background-color: var(--accent-hover);
}

#load-more:disabled {
  background-color: var(--border-color);
  cursor: not-allowed;
}

#load-more.loading {
  position: relative;
  color: transparent;
}

#load-more.loading::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  top: 50%;
  left: 50%;
  margin-left: -12px;
  margin-top: -12px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* --- Loading Overlay --- */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(13, 13, 18, 0.85);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 20px;
}

.loading-overlay.active {
  display: flex;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-text {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 500;
}

.loading-subtext {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Button loading state */
.lookup-btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
  background-color: var(--accent-color);
}

.lookup-btn.loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  top: 50%;
  left: 50%;
  margin-left: -9px;
  margin-top: -9px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
  .search-row {
    flex-direction: column;
    gap: 10px;
  }

  .search-bar {
    border-radius: 0 0 8px 8px;
  }

  .search-bar input[type="text"] {
    padding: 14px 16px;
    border-radius: 0 0 8px 8px;
  }

  .lookup-btn {
    width: 100%;
    padding: 14px 20px;
  }

  .platform-tab span {
    padding: 10px 20px;
    font-size: 0.85rem;
  }

  .row {
    flex-direction: column;
    align-items: flex-start;
  }

  .row>div:nth-child(2) {
    min-width: 0;
    width: 100%;
  }

  .idx {
    margin-bottom: 10px;
  }

  .title-btn {
    font-size: 1rem;
    width: 100%;
  }

  .actions {
    width: 100%;
  }

  .embed-btn {
    white-space: nowrap;
    max-width: 100%;
  }

  .preview {
    margin-top: 15px;
    margin-left: 0;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }
}