/**
 * style.css - Estilos específicos para Extractor de paletas cromáticas con K-Means y armonías
 * Fijate Tools - Categoría diseno
 */

/* ==========================================================================
   1. Variables de diseño y temas (Claro / Oscuro)
   ========================================================================== */
:root {
  --bg-primary: #0b1320;
  --bg-surface: #132238;
  --bg-surface-elevated: #1a2d47;
  --bg-surface-soft: rgba(255, 255, 255, 0.04);
  --border-color: rgba(255, 255, 255, 0.09);
  --border-color-hover: rgba(56, 189, 248, 0.4);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --accent-primary: #38bdf8;
  --accent-hover: #0ea5e9;
  --accent-glow: rgba(56, 189, 248, 0.25);
  --accent-secondary: #818cf8;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);

  --transition-fast: 0.18s ease;
  --transition-normal: 0.25s ease;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-soft: rgba(15, 23, 42, 0.03);
  --border-color: #e2e8f0;
  --border-color-hover: rgba(2, 132, 199, 0.4);

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  --accent-primary: #0284c7;
  --accent-hover: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.2);
  --accent-secondary: #6366f1;

  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
}

/* ==========================================================================
   2. Reset y contención general
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-main);
  margin-top: 0;
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

/* ==========================================================================
   3. Layout principal y migas de pan
   ========================================================================== */
.tool-layout {
  max-width: 1240px;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
  width: 100%;
}

.tool-with-sidebar {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.tool-main-content {
  flex: 1 1 0%;
  min-width: 0;
  width: 100%;
}

.tool-ad-sidebar {
  width: 300px;
  flex-shrink: 0;
}

.tool-breadcrumbs {
  margin-bottom: 1.25rem;
}

.tool-breadcrumbs-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.tool-breadcrumbs-item a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.tool-breadcrumbs-item a:hover {
  color: var(--accent-primary);
}

.tool-breadcrumbs-item:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--text-subtle);
}

.tool-breadcrumbs-item[aria-current="page"] {
  color: var(--text-main);
  font-weight: 500;
}

/* ==========================================================================
   4. Tarjetas principales (Card containers)
   ========================================================================== */
.palette-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-normal);
}

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

.card-header-clean {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-icon-pill {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-soft);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.card-main-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0;
}

.card-badge-pill {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--accent-primary);
}

/* ==========================================================================
   5. Zona de carga, Dropzone y Presets
   ========================================================================== */
.dropzone-container {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.5rem;
  text-align: center;
  background-color: var(--bg-surface-soft);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.dropzone-container:hover,
.dropzone-container.dragover {
  border-color: var(--accent-primary);
  background-color: var(--accent-glow);
  transform: translateY(-2px);
}

.dropzone-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 1rem;
}

.dropzone-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
}

.dropzone-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0 0 1.25rem;
}

.dropzone-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Botones principales con altura mínima de 40px */
.btn-primary, .btn-secondary, .btn-outline {
  min-height: 40px;
  padding: 0.55rem 1.25rem;
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-surface-soft);
  border-color: var(--border-color-hover);
  color: var(--accent-primary);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Galería de presets rápidos */
.presets-section {
  margin-top: 1rem;
}

.presets-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
  display: block;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.65rem;
}

.btn-preset {
  min-height: 40px;
  padding: 0.5rem 0.85rem;
  background-color: var(--bg-surface-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.825rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.btn-preset:hover {
  border-color: var(--accent-primary);
  background-color: var(--bg-surface-elevated);
}

.btn-preset.active {
  border-color: var(--accent-primary);
  background-color: var(--accent-glow);
  color: var(--accent-primary);
  font-weight: 600;
}

.preset-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ==========================================================================
   6. Vista previa de imagen y Lupa cuentagotas
   ========================================================================== */
.photo-workspace {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .photo-workspace {
    grid-template-columns: 1fr;
  }
}

.photo-preview-wrapper {
  position: relative;
  background-color: var(--bg-surface-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: crosshair;
  min-height: 280px;
}

.photo-canvas {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: contain;
  display: block;
}

/* Lupa flotante */
.loupe-lens {
  position: absolute;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  transform: translate(-50%, -120%);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
  z-index: 20;
  transition: opacity 0.1s ease;
}

.loupe-color-preview {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid #ffffff;
  margin-bottom: 2px;
}

.loupe-hex-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  font-weight: 700;
  color: #ffffff;
}

/* Panel de controles de clustering K-Means */
.controls-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.control-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 600;
}

.quick-count-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.btn-quick-count {
  min-height: 40px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-quick-count:hover {
  border-color: var(--accent-primary);
}

.btn-quick-count.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

/* Slider accesible */
.range-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-surface-elevated);
  outline: none;
  accent-color: var(--accent-primary);
  cursor: pointer;
}

/* Desplegable canónico con fondo sólido explícito (lección 208) */
.form-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  min-height: 40px;
  padding: 0.5rem 40px 0.5rem 0.85rem;
  background-color: #0b1320;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: inherit;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2338bdf8' stroke-width='2.2' 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: calc(100% - 14px) center;
  cursor: pointer;
}

.form-select option {
  background-color: #132238;
  color: #f8fafc;
  padding: 10px;
}

.form-select optgroup {
  background-color: #0b1320;
  color: var(--accent-primary);
  font-weight: 700;
}

[data-theme="light"] .form-select {
  background-color: #ffffff;
  color: #0f172a;
  border-color: var(--border-color);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%230284c7' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}

[data-theme="light"] .form-select option {
  background-color: #ffffff;
  color: #0f172a;
}

[data-theme="light"] .form-select optgroup {
  background-color: #f1f5f9;
  color: #0369a1;
}

/* ==========================================================================
   7. Resultados de la paleta: Barra proporcional y Swatches
   ========================================================================== */
.palette-bar-wrapper {
  margin-bottom: 1.5rem;
}

.palette-bar {
  height: 42px;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.palette-bar-segment {
  height: 100%;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
  position: relative;
}

.palette-bar-segment:hover {
  filter: brightness(1.15);
  transform: scaleY(1.06);
  z-index: 2;
}

.swatches-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.swatch-card {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.swatch-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
}

.swatch-card.is-active-base {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary);
}

.swatch-color-box {
  height: 100px;
  width: 100%;
  padding: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
  transition: filter var(--transition-fast);
}

.swatch-card:hover .swatch-color-box {
  filter: saturate(1.08);
}

.swatch-percentage {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.85rem;
  background: rgba(0, 0, 0, 0.4);
  color: #ffffff;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
}

.btn-swatch-copy {
  background: rgba(0, 0, 0, 0.4);
  color: #ffffff;
  border: none;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  transition: all var(--transition-fast);
}

.btn-swatch-copy:hover {
  background: rgba(0, 0, 0, 0.75);
  transform: scale(1.1);
}

.swatch-info {
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.swatch-name-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.swatch-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.wcag-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.badge-aaa {
  background-color: rgba(34, 197, 94, 0.2);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.4);
}

.badge-aa {
  background-color: rgba(56, 189, 248, 0.2);
  color: var(--accent-primary);
  border: 1px solid rgba(56, 189, 248, 0.4);
}

.badge-low {
  background-color: rgba(245, 158, 11, 0.2);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

.swatch-code-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.code-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.775rem;
  padding: 0.25rem 0.4rem;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.code-btn:hover {
  background: var(--bg-surface-soft);
  border-color: var(--border-color);
  color: var(--accent-primary);
}

.code-btn.hex-code {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-main);
}

.palette-telemetry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-subtle);
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
}

/* ==========================================================================
   8. Sección de Armonías y Rueda cromática
   ========================================================================== */
.harmonies-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: center;
}

@media (max-width: 900px) {
  .harmonies-layout {
    grid-template-columns: 1fr;
  }
}

.harmonies-tabs-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.btn-harmony-tab {
  min-height: 40px;
  padding: 0.45rem 0.95rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.btn-harmony-tab:hover {
  color: var(--text-main);
  border-color: var(--border-color-hover);
}

.btn-harmony-tab.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.harmony-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.active-base-color-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-main);
  background: var(--bg-surface-soft);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.base-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid #ffffff;
}

.harmony-description-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0 0 1.25rem;
}

.harmonies-swatches-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.85rem;
}

.harmony-swatch-item {
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.harmony-swatch-item:hover {
  transform: translateY(-2px);
  border-color: var(--accent-primary);
}

.harmony-swatch-item.is-harmony-base {
  border-color: var(--accent-primary);
}

.harmony-color-block {
  height: 65px;
  padding: 0.45rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 0.7rem;
  font-weight: 700;
}

.harmony-role {
  text-transform: uppercase;
  font-size: 0.65rem;
  opacity: 0.9;
}

.harmony-hex {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
}

.harmony-details {
  padding: 0.55rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.harmony-name {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.harmony-hsl {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}

/* Rueda cromática Canvas */
.wheel-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.wheel-canvas {
  width: 280px;
  height: 280px;
  max-width: 100%;
}

/* ==========================================================================
   9. Botones de exportación
   ========================================================================== */
.export-actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.85rem;
}

/* ==========================================================================
   10. Modal de Tarjeta descargable para Instagram y Pinterest
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(5px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.modal-window {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -46%) scale(0.96);
  width: 92%;
  max-width: 820px;
  max-height: 90vh;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-window.is-open {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
  visibility: visible;
}

.modal-header {
  padding: 1.25rem 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
}

.btn-modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.btn-modal-close:hover {
  background: var(--bg-surface-soft);
  color: var(--text-main);
}

.modal-body {
  padding: 1.75rem;
  overflow-y: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
}

@media (max-width: 768px) {
  .modal-body {
    grid-template-columns: 1fr;
  }
}

.card-preview-box {
  background-color: var(--bg-surface-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  max-height: 460px;
}

.card-preview-canvas {
  max-width: 100%;
  max-height: 420px;
  width: auto;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

.modal-controls-box {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-input-text {
  width: 100%;
  min-height: 40px;
  padding: 0.55rem 0.85rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.9rem;
  font-family: inherit;
  box-sizing: border-box;
}

.form-input-text:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.modal-footer {
  padding: 1rem 1.75rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* ==========================================================================
   11. Toast flotante de notificación
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast-item {
  min-height: 40px;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  background-color: #0b1320;
  border: 1px solid var(--border-color);
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  pointer-events: auto;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast-item.is-visible {
  transform: translateY(0);
  opacity: 1;
}

.toast-item.toast-success {
  border-color: rgba(34, 197, 94, 0.4);
}

.toast-item.toast-error {
  border-color: rgba(239, 68, 68, 0.4);
}

.toast-icon {
  font-size: 1rem;
}

/* ==========================================================================
   12. Guía didáctica SEO y acordeón de preguntas frecuentes
   ========================================================================== */
.seo-guide-section {
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-color);
}

.seo-guide-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 2.5rem;
}

.seo-authority-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
}

.seo-guide-title {
  font-size: 1.85rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.seo-guide-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.seo-guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.seo-guide-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.guide-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface-soft);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
}

.guide-card-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
}

.guide-card-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}

/* Acordeón FAQ nativo */
.seo-faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.seo-faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.seo-faq-item[open] {
  border-color: var(--border-color-hover);
}

.seo-faq-question {
  padding: 1.15rem 1.25rem;
  font-weight: 600;
  font-size: 0.975rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.seo-faq-question::-webkit-details-marker {
  display: none;
}

.seo-faq-question::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--accent-primary);
  font-weight: 400;
  transition: transform var(--transition-fast);
}

.seo-faq-item[open] .seo-faq-question::after {
  transform: rotate(45deg);
}

.seo-faq-answer {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}

/* ==========================================================================
   13. Adaptación responsiva adicional
   ========================================================================== */
@media (max-width: 640px) {
  .palette-card {
    padding: 1.25rem;
  }

  .swatches-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .dropzone-container {
    padding: 1.75rem 1rem;
  }

  .dropzone-actions {
    flex-direction: column;
    width: 100%;
  }

  .dropzone-actions button {
    width: 100%;
  }

  .quick-count-group {
    grid-template-columns: repeat(4, 1fr);
  }
}