/* ============================================
   CSS Variables
   ============================================ */
:root {
  /* Color Palette - Dark Theme */
  --color-bg-primary: #0a0a0a;
  --color-bg-secondary: #1a1a1a;
  --color-bg-tertiary: #2a2a2a;
  --color-bg-card: rgba(30, 30, 30, 0.6);
  --color-bg-card-hover: rgba(40, 40, 40, 0.8);
  --color-bg-modal: rgba(20, 20, 20, 0.95);
  --color-bg-input: rgba(40, 40, 40, 0.6);

  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-hover: rgba(255, 255, 255, 0.2);

  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0a0;
  --color-text-tertiary: #707070;

  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-accent-dark: #1d4ed8;

  --color-success: #10b981;
  --color-success-hover: #059669;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-medium: 250ms ease;

  /* Typography */
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono',
               Consolas, 'Courier New', monospace;
}

/* ============================================
   Base Styles & Reset
   ============================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-system);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ============================================
   Background Gradient
   ============================================ */
.background-gradient {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background: linear-gradient(
    135deg,
    rgba(15, 15, 15, 1) 0%,
    rgba(10, 10, 10, 1) 50%,
    rgba(5, 5, 5, 1) 100%
  );
}

.background-gradient::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at 30% 20%,
    rgba(59, 130, 246, 0.08) 0%,
    transparent 50%
  );
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-10%, -10%); }
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
  position: relative;
  z-index: 1;
}

@media (min-width: 768px) {
  .container {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }
}

/* ============================================
   Header Section
   ============================================ */
.header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--color-border);
}

.banner-image {
  width: 100%;
  max-width: 1000px;
  aspect-ratio: 5 / 1;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: var(--radius-lg);
  margin: 0 auto var(--spacing-xl);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3),
              0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

.title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, #ffffff 0%, #a0a0a0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.7;
}

.author-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
  font-size: 0.9375rem;
}

@media (min-width: 640px) {
  .author-info {
    flex-direction: row;
    justify-content: center;
  }
}

.published-by {
  color: var(--color-text-secondary);
}

.author-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.author-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.author-email {
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
  margin-left: var(--spacing-xs);
}

.info-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.info-link:hover {
  color: var(--color-accent-hover);
}

.info-link svg {
  width: 14px;
  height: 14px;
}

/* ============================================
   Add to VCC Section
   ============================================ */
.add-to-vcc-section {
  margin-bottom: var(--spacing-2xl);
  display: flex;
  justify-content: center;
}

.url-input-group {
  display: flex;
  gap: var(--spacing-sm);
  width: 100%;
  max-width: 700px;
  flex-wrap: wrap;
}

@media (min-width: 640px) {
  .url-input-group {
    flex-wrap: nowrap;
  }
}

.url-input {
  flex: 1;
  min-width: 200px;
  padding: 0.625rem 1rem;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-fast),
              background var(--transition-fast);
}

.url-input:focus {
  border-color: var(--color-accent);
  background: var(--color-bg-tertiary);
}

.url-input::selection {
  background: var(--color-accent);
  color: white;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: var(--font-system);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-input);
  border-color: var(--color-border-hover);
}

.btn-icon {
  padding: 0.625rem;
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-icon:hover:not(:disabled) {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border-color: var(--color-border-hover);
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
}

.btn svg {
  flex-shrink: 0;
}

/* ============================================
   Search Section
   ============================================ */
.search-section {
  margin-bottom: var(--spacing-xl);
  display: flex;
  justify-content: center;
}

.search-box {
  position: relative;
  width: 100%;
  max-width: 500px;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  font-size: 1rem;
  outline: none;
  transition: all var(--transition-medium);
  backdrop-filter: blur(10px);
}

.search-input:focus {
  border-color: var(--color-accent);
  background: var(--color-bg-input);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

/* ============================================
   Packages Section
   ============================================ */
.packages-section {
  margin-bottom: var(--spacing-2xl);
}

.packages-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
}

/* 
@media (min-width: 768px) {
  .packages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .packages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
*/

.package-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-medium);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  max-width: 400px;
  flex: 1 1 300px;
}

.package-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.package-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.package-info {
  flex: 1;
  min-width: 0;
}

.package-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
  word-wrap: break-word;
}

.package-id {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  word-wrap: break-word;
}

.package-type-badge {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-accent);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  flex-shrink: 0;
}

.package-description {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  flex: 1;
}

.package-footer {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: auto;
  flex-wrap: wrap;
}

/* ============================================
   Modals
   ============================================ */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  animation: fadeIn var(--transition-medium);
}

.modal-content {
  position: relative;
  background: var(--color-bg-modal);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5),
              0 10px 10px -5px rgba(0, 0, 0, 0.3);
  animation: slideUp var(--transition-medium);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-body p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.modal-body ol,
.modal-body ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
  color: var(--color-text-secondary);
}

.modal-body li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.modal-body a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.modal-body a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.package-meta {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  margin-top: var(--spacing-xs);
  flex-wrap: wrap;
}

.version-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.info-section {
  margin-bottom: var(--spacing-xl);
}

.info-section:last-child {
  margin-bottom: 0;
}

.info-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

.info-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.info-section ul li {
  padding: var(--spacing-sm);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.info-section.hidden {
  display: none;
}

.keywords-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.keywords-container .keyword-badge {
  padding: 0.375rem 0.75rem;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.url-section {
  margin: var(--spacing-lg) 0;
}

.url-section label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.help-footer {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

/* ============================================
   Context Menu
   ============================================ */
.context-menu {
  position: fixed;
  background: var(--color-bg-modal);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-xs);
  min-width: 180px;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4),
              0 4px 6px -2px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(20px);
  z-index: 1001;
}

.context-menu[hidden] {
  display: none;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 0.9375rem;
  font-family: var(--font-system);
  cursor: pointer;
  transition: background var(--transition-fast);
  text-align: left;
}

.context-menu-item:hover {
  background: var(--color-bg-tertiary);
}

.context-menu-item svg {
  flex-shrink: 0;
  color: var(--color-text-secondary);
}

/* ============================================
   Tabs
   ============================================ */
.tabs {
  display: flex;
  gap: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.tab-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--color-text-secondary);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

.tab-content {
  display: none;
  animation: fadeIn var(--transition-fast);
}

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

/* ============================================
   Utility Classes
   ============================================ */
.hidden {
  display: none !important;
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  border: 2px solid var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-bg-input);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 640px) {
  .url-input-group {
    flex-direction: column;
  }

  .url-input {
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .package-footer {
    flex-direction: column;
  }

  .package-footer .btn {
    width: 100%;
  }
}