/* ------------------- */
/* Custom Properties   */
/* ------------------- */
:root {
  --font-family: 'Manrope', sans-serif;

  /* Dark Theme Colors */
  --bg-dark: #101223;
  --surface-dark: #21293C;
  --text-primary-dark: #FFFFFF;
  --text-secondary-dark: #CDD5E0;
  --accent-dark: #F87070;
  --accent-hover-dark: #f68c8c;
  
  /* Light Theme Colors */
  --bg-light: #F2F2F2;
  --surface-light: #FFFFFF;
  --text-primary-light: #101223;
  --text-secondary-light: #4A5568;
  --accent-light: #F87070;
  --accent-hover-light: #f68c8c;

  /* Universal */
  --border-radius: 12px;
  --transition-speed: 0.3s;
}

body {
  font-family: var(--font-family);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  margin: 0;
  padding: 2rem 1.5rem;
}

body.dark-theme {
  background-color: var(--bg-dark);
  color: var(--text-primary-dark);
}

body.light-theme {
  background-color: var(--bg-light);
  color: var(--text-primary-light);
}


/* ------------------- */
/* General & Header    */
/* ------------------- */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1110px;
  margin: 0 auto 3rem;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-container h1 {
  font-size: 1.75rem;
  font-weight: 700;
}

.theme-toggle {
  background-color: var(--surface-dark);
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-speed) ease;
}

.light-theme .theme-toggle {
    background-color: var(--surface-light);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.theme-toggle:hover {
  filter: brightness(1.2);
}

.theme-toggle svg {
    stroke: var(--text-secondary-dark);
}
.light-theme .theme-toggle svg {
    stroke: var(--text-secondary-light);
}

.dark-theme .moon-icon,
.light-theme .sun-icon {
    display: none;
}

/* ------------------- */
/* Main Content        */
/* ------------------- */
.main-content {
  max-width: 1110px;
  margin: 0 auto;
}

.list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.list-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
}

.filter-controls {
  display: flex;
  gap: 0.5rem;
  background-color: var(--surface-dark);
  padding: 0.5rem;
  border-radius: var(--border-radius);
}
.light-theme .filter-controls {
  background-color: var(--surface-light);
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.filter-btn {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  background-color: transparent;
  color: var(--text-secondary-dark);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.light-theme .filter-btn {
    color: var(--text-secondary-light);
}

.filter-btn:hover {
  color: var(--text-primary-dark);
}
.light-theme .filter-btn:hover {
  color: var(--text-primary-light);
}

.filter-btn.active {
  background-color: var(--accent-dark);
  color: var(--text-primary-dark);
}


/* ------------------- */
/* Extensions Grid     */
/* ------------------- */
.extensions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.extension-card {
  background-color: var(--surface-dark);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}
.light-theme .extension-card {
    background-color: var(--surface-light);
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.05);
}

.extension-card:hover {
  transform: translateY(-5px);
  box-shadow: 0px 10px 20px rgba(0, 0, 0, 0.2);
}

.card-header {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.card-icon {
    flex-shrink: 0;
}

.card-info h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.card-info p {
  margin: 0;
  font-size: 1rem;
  color: var(--text-secondary-dark);
  line-height: 1.5;
}
.light-theme .card-info p {
    color: var(--text-secondary-light);
}

.card-divider {
  border: none;
  height: 1px;
  background-color: var(--text-secondary-dark);
  opacity: 0.2;
  margin: 1.5rem 0;
}

.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.remove-btn {
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary-dark);
  background-color: transparent;
  border: 1px solid var(--text-secondary-dark);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
}
.light-theme .remove-btn {
    color: var(--text-secondary-light);
    border-color: var(--text-secondary-light);
}

.remove-btn:hover {
  background-color: var(--text-secondary-dark);
  color: var(--bg-dark);
}
.light-theme .remove-btn:hover {
  background-color: var(--text-secondary-light);
  color: var(--bg-light);
}


/* ------------------- */
/* Toggle Switch       */
/* ------------------- */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 28px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--text-secondary-dark);
  transition: var(--transition-speed);
  border-radius: 34px;
}
.light-theme .slider {
    background-color: var(--text-secondary-light);
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 4px;
  background-color: var(--surface-dark);
  transition: var(--transition-speed);
  border-radius: 50%;
}

.light-theme .slider:before {
    background-color: var(--surface-light);
}

input:checked + .slider {
  background-color: var(--accent-dark);
}

input:checked + .slider:before {
  transform: translateX(22px);
}

/* Focus states for accessibility */
.remove-btn:focus-visible,
.filter-btn:focus-visible,
.theme-toggle:focus-visible {
    outline: 2px solid var(--accent-dark);
    outline-offset: 2px;
}

.slider:focus-visible {
    outline: 2px solid var(--accent-dark);
    outline-offset: 2px;
}


/* ------------------- */
/* Responsive Design   */
/* ------------------- */
@media (max-width: 768px) {
  .list-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .list-header h2 {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
    body {
        padding: 1.5rem 1rem;
    }
    .header {
        margin-bottom: 2rem;
    }
    .logo-container h1 {
        font-size: 1.5rem;
    }
    .list-header h2 {
        font-size: 1.5rem;
    }
    .filter-controls {
        width: 100%;
        display: flex;
        justify-content: space-around;
    }
    .filter-btn {
        flex-grow: 1;
        text-align: center;
    }
}