/* ==========================================================================
   Generador de Códigos QR Vectoriales - Sistema de Estilos Premium
   ========================================================================== */

:root {
  /* Paleta Modo Oscuro por Defecto */
  --bg-main: #0b0f19;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 34, 52, 0.85);
  --bg-input: rgba(13, 17, 28, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;

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

  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --gradient-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #c026d3 100%);

  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;

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

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 35px rgba(99, 102, 241, 0.25);

  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-main: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-input: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: #4f46e5;

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;

  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-glow: rgba(79, 70, 229, 0.2);
  --shadow-glow: 0 10px 30px rgba(79, 70, 229, 0.15);
}

/* Reset y Bases */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

/* Elementos decorativos de fondo */
.bg-ambient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  animation: orbFloat 20s infinite alternate cubic-bezier(0.45, 0, 0.55, 1);
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: #6366f1;
  top: -100px;
  left: -100px;
}

.orb-2 {
  width: 450px;
  height: 450px;
  background: #d946ef;
  bottom: -100px;
  right: -50px;
  animation-delay: -7s;
}

.orb-3 {
  width: 350px;
  height: 350px;
  background: #06b6d4;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -12s;
}

@keyframes orbFloat {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -60px) scale(1.1); }
  100% { transform: translate(-30px, 40px) scale(0.95); }
}

/* Estructura Principal */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1380px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  box-shadow: var(--shadow-glow);
}

.brand-title-group h1 {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-main) 60%, var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.12);
  color: var(--success-color);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: var(--transition-fast);
  backdrop-filter: blur(12px);
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Banner Informativo Transparencia */
.trust-banner {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  backdrop-filter: blur(8px);
}

.trust-banner-icon {
  font-size: 22px;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.trust-banner-text p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.trust-banner-text strong {
  color: var(--text-main);
  font-weight: 600;
}

/* Rejilla de la Aplicación */
.app-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 32px;
  align-items: start;
}

@media (max-width: 1024px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
}

/* Paneles Glassmorphism */
.glass-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
}

/* Pestañas de tipo de contenido */
.tabs-container {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  scrollbar-width: thin;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: #ffffff;
  background: var(--gradient-primary);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

/* Formularios de datos */
.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-fast);
  outline: none;
}

/* Custom Dropdown Select */
select.form-control {
  appearance: none;
  -webkit-appearance: none;
  -moz-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='%2394a3b8' 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 14px center;
  background-size: 16px;
  padding-right: 40px;
  cursor: pointer;
}

select.form-control option {
  background-color: #0f172a;
  color: #f8fafc;
  padding: 12px;
}

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

/* Custom File Input Fallback */
input[type="file"]::file-selector-button,
input[type="file"]::-webkit-file-upload-button {
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  margin-right: 14px;
  transition: var(--transition-fast);
}

input[type="file"]::file-selector-button:hover,
input[type="file"]::-webkit-file-upload-button:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 0 15px var(--accent-glow);
}

/* Componente Uploader Personalizado para Logotipo */
.file-uploader-box {
  position: relative;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  background: var(--bg-input);
  transition: var(--transition-fast);
  cursor: pointer;
  overflow: hidden;
}

.file-uploader-box:hover,
.file-uploader-box.drag-over {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.15);
}

.file-uploader-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}

.file-uploader-content {
  display: flex;
  align-items: center;
  gap: 14px;
  pointer-events: none;
}

.file-uploader-icon {
  font-size: 22px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.file-uploader-text {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  overflow: hidden;
}

.file-uploader-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-uploader-subtitle {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.file-uploader-badge {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.15);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99, 102, 241, 0.25);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.file-uploader-box:hover .file-uploader-badge {
  background: var(--accent-primary);
  color: #ffffff;
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

/* Acordeón de Personalización Visual */
.section-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 18px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
}

.accordion-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.15);
  overflow: hidden;
  transition: var(--transition-fast);
}

.accordion-header {
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.95rem;
  user-select: none;
}

.accordion-header:hover {
  background: rgba(255, 255, 255, 0.03);
}

.accordion-icon {
  transition: transform 0.3s ease;
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  padding: 18px;
  display: none;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
}

.accordion-item.open .accordion-body {
  display: block;
}

/* Selector de Opciones Gráficas (Radio Cards) */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 10px;
}

.option-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 8px;
  text-align: center;
  cursor: pointer;
  background: var(--bg-input);
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.option-card:hover {
  border-color: var(--accent-primary);
}

.option-card.selected {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.12);
  box-shadow: 0 0 0 2px var(--accent-primary);
}

.option-card svg {
  width: 28px;
  height: 28px;
  fill: var(--text-main);
}

.option-card span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Pickers de Color */
.color-pickers-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}

.color-input-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-md);
}

.color-input-wrapper input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  background: transparent;
}

.color-input-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-input-wrapper input[type="color"]::-webkit-color-swatch {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
}

.color-text {
  font-size: 0.88rem;
  font-family: monospace;
  color: var(--text-main);
  text-transform: uppercase;
}

/* Controles de Rango (Sliders) */
.range-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.range-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.range-slider {
  width: 100%;
  accent-color: var(--accent-primary);
  cursor: pointer;
}

/* Panel Lateral Derecho: Previsualizador Fijo */
.preview-panel-wrapper {
  position: sticky;
  top: 24px;
}

.preview-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.preview-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.qr-box-container {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1 / 1;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-fast);
}

.qr-box-container canvas,
.qr-box-container svg {
  max-width: 100% !important;
  max-height: 100% !important;
  display: block;
}

/* Indicador de contraste y legibilidad */
.readability-status {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
}

.readability-status.good {
  background: rgba(16, 185, 129, 0.12);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.readability-status.warning {
  background: rgba(245, 158, 11, 0.12);
  color: var(--warning-color);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.readability-status.bad {
  background: rgba(239, 68, 68, 0.12);
  color: var(--danger-color);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

/* Botones de Descarga */
.download-actions {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition-fast);
  width: 100%;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background: var(--gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 0 45px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}

/* Selector de Resolución PNG */
.res-selector-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.res-select {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.85rem;
}

/* Modales Personalizados (Sin Alert) */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 460px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-backdrop.active .modal-card {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.modal-header h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
}

.modal-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Footer */
.app-footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-dim);
}