/* ==========================================================================
   Fijate Tools - Laboratorio de revelado fotográfico digital y creador de LUTs
   Estilos específicos de la herramienta
   ========================================================================== */

:root {
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Tema claro */
  --bg-darkroom-card: #ffffff;
  --bg-darkroom-inner: #f8fafc;
  --bg-darkroom-box: #ffffff;
  --bg-darkroom-viewport: #0b0f17;
  --border-darkroom-subtle: #e2e8f0;
  --border-darkroom-strong: #cbd5e1;
  --text-darkroom-main: #0f172a;
  --text-darkroom-muted: #475569;
  --accent-darkroom: #2563eb;
  --accent-darkroom-hover: #1d4ed8;
  --accent-darkroom-light: #eff6ff;
  --success-darkroom: #059669;
  --success-darkroom-hover: #047857;
  --modal-bg: #ffffff;
  --modal-overlay: rgba(15, 23, 42, 0.65);
}

[data-theme="dark"] {
  --bg-darkroom-card: #131b2e;
  --bg-darkroom-inner: #0d1424;
  --bg-darkroom-box: #162035;
  --bg-darkroom-viewport: #070a10;
  --border-darkroom-subtle: #26334d;
  --border-darkroom-strong: #334466;
  --text-darkroom-main: #f1f5f9;
  --text-darkroom-muted: #94a3b8;
  --accent-darkroom: #3b82f6;
  --accent-darkroom-hover: #60a5fa;
  --accent-darkroom-light: rgba(59, 130, 246, 0.15);
  --success-darkroom: #10b981;
  --success-darkroom-hover: #059669;
  --modal-bg: #162035;
  --modal-overlay: rgba(3, 7, 18, 0.8);
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-body, #f8fafc);
  color: var(--text-darkroom-main);
  margin: 0;
  padding: 0;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

[data-theme="dark"] body {
  background-color: #0b1120;
}

.tool-layout h1,
.tool-layout h2,
.tool-layout h3,
.tool-layout h4 {
  font-family: var(--font-heading);
  letter-spacing: -0.015em;
  color: var(--text-darkroom-main);
  margin-top: 0;
}

.mono {
  font-family: var(--font-mono);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Tarjeta principal */
.darkroom-card {
  background: var(--bg-darkroom-card);
  border: 1px solid var(--border-darkroom-subtle);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
  margin-bottom: 2rem;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

@media (max-width: 640px) {
  .darkroom-card {
    padding: 1rem;
    border-radius: 0.75rem;
  }
}

/* Badge de privacidad */
.privacy-badge {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 1rem;
  border-radius: 0.625rem;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--text-darkroom-main);
  font-size: 0.875rem;
  line-height: 1.45;
  margin-bottom: 1.5rem;
}

.privacy-badge svg {
  flex-shrink: 0;
  color: var(--accent-darkroom);
}

/* Dropzone de subida */
.upload-dropzone {
  border: 2px dashed var(--border-darkroom-strong);
  background: var(--bg-darkroom-inner);
  border-radius: 0.875rem;
  padding: 3rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.upload-dropzone:hover,
.upload-dropzone.drag-active {
  border-color: var(--accent-darkroom);
  background: rgba(37, 99, 235, 0.04);
}

.dropzone-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--accent-darkroom-light);
  color: var(--accent-darkroom);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.dropzone-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.dropzone-subtitle {
  color: var(--text-darkroom-muted);
  font-size: 0.9375rem;
  margin-bottom: 1.75rem;
  max-width: 480px;
}

.dropzone-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  width: 100%;
}

@media (max-width: 640px) {
  .dropzone-actions {
    flex-direction: column;
  }
}

/* Barra de Presets */
.presets-bar {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  background: var(--bg-darkroom-inner);
  border: 1px solid var(--border-darkroom-subtle);
  border-radius: 0.625rem;
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.presets-label {
  font-size: 0.8125rem;
  font-weight: 700;
  white-space: nowrap;
  color: var(--text-darkroom-main);
}

.presets-scroll-track {
  display: flex;
  gap: 0.5rem;
}

.preset-pill {
  border: 1px solid var(--border-darkroom-subtle);
  background: var(--bg-darkroom-card);
  color: var(--text-darkroom-main);
  padding: 0.35rem 0.875rem;
  border-radius: 2rem;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.preset-pill:hover {
  border-color: var(--accent-darkroom);
  background: var(--accent-darkroom-light);
}

.preset-pill.active {
  background: var(--accent-darkroom);
  color: #ffffff;
  border-color: var(--accent-darkroom);
}

/* Layout partido (Viewer + Controles) */
.darkroom-split-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 960px) {
  .darkroom-split-layout {
    grid-template-columns: 1fr;
  }
}

/* Columna de visualización */
.darkroom-viewer-col {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.viewer-container {
  position: relative;
  width: 100%;
  min-height: 440px;
  max-height: 72vh;
  background: var(--bg-darkroom-viewport);
  border-radius: 0.75rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.4);
}

#canvas-main {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  display: block;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* Barra divisoria de pantalla partida */
.split-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  background: #ffffff;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.6);
  cursor: ew-resize;
  z-index: 30;
}

.split-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #ffffff;
  color: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

/* Botón flotante "Ver original" */
.btn-hold-compare {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(15, 23, 42, 0.8);
  color: #ffffff;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 20;
}

.btn-hold-compare:hover {
  background: rgba(15, 23, 42, 0.95);
  color: #ffffff;
}

.viewer-actions-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.viewer-left-actions,
.viewer-right-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .viewer-actions-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .viewer-left-actions,
  .viewer-right-actions {
    flex-direction: column;
  }
}

/* Columna de controles de retoque */
.darkroom-controls-col {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  max-height: 85vh;
  overflow-y: auto;
  padding-right: 0.25rem;
  scrollbar-width: thin;
}

.control-box {
  background: var(--bg-darkroom-inner);
  border: 1px solid var(--border-darkroom-subtle);
  border-radius: 0.625rem;
  padding: 0.875rem;
}

.box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-darkroom-subtle);
}

.box-title {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-darkroom-main);
}

/* Histograma */
.histogram-box {
  padding-bottom: 0.5rem;
}

.hist-legend {
  display: flex;
  gap: 0.35rem;
}

.legend-dot {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
  line-height: 1;
}

.dot-r { background: rgba(239, 68, 68, 0.2); color: #ef4444; }
.dot-g { background: rgba(34, 197, 94, 0.2); color: #22c55e; }
.dot-b { background: rgba(59, 130, 246, 0.2); color: #3b82f6; }
.dot-l { background: rgba(255, 255, 255, 0.2); color: var(--text-darkroom-main); }

#canvas-histogram {
  width: 100%;
  height: 90px;
  display: block;
  background: #000000;
  border-radius: 0.375rem;
}

/* Curvas de tonos */
.curve-channel-tabs {
  display: flex;
  gap: 0.25rem;
}

.tab-btn {
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid var(--border-darkroom-subtle);
  background: var(--bg-darkroom-card);
  color: var(--text-darkroom-main);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--accent-darkroom);
  color: #fff;
  border-color: var(--accent-darkroom);
}

.tab-btn.tab-r.active { background: #ef4444; border-color: #ef4444; }
.tab-btn.tab-g.active { background: #22c55e; border-color: #22c55e; }
.tab-btn.tab-b.active { background: #3b82f6; border-color: #3b82f6; }

.curve-canvas-wrap {
  width: 100%;
  background: #000000;
  border-radius: 0.375rem;
  overflow: hidden;
}

#canvas-curve {
  width: 100%;
  height: 180px;
  display: block;
  cursor: crosshair;
}

/* Deslizadores */
.sliders-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.slider-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.slider-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.slider-meta label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-darkroom-main);
}

.slider-num {
  font-size: 0.75rem;
  color: var(--text-darkroom-muted);
}

.ctrl-range {
  width: 100%;
  accent-color: var(--accent-darkroom);
  cursor: pointer;
  height: 5px;
}

/* Gradientes en deslizadores de Temperatura y Matiz */
.range-temp {
  background: linear-gradient(to right, #38bdf8, #cbd5e1, #f59e0b) !important;
  border-radius: 3px;
}

.range-tint {
  background: linear-gradient(to right, #22c55e, #cbd5e1, #d946ef) !important;
  border-radius: 3px;
}

/* Mezclador HSL */
.hsl-color-picker-row {
  display: flex;
  gap: 0.3rem;
}

.hsl-btn-color {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s ease;
}

.hsl-btn-color:hover {
  transform: scale(1.15);
}

.hsl-btn-color.active {
  border-color: #ffffff;
  box-shadow: 0 0 0 1.5px var(--accent-darkroom);
  transform: scale(1.15);
}

/* Botones canónicos */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-main);
  font-size: 0.9375rem;
  font-weight: 600;
  min-height: 42px;
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  text-decoration: none;
  line-height: 1;
}

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

.btn-primary:hover {
  background: var(--accent-darkroom-hover);
}

.btn-success {
  background: var(--success-darkroom);
  color: #ffffff;
  border-color: var(--success-darkroom);
}

.btn-success:hover {
  background: var(--success-darkroom-hover);
}

.btn-outline {
  background: transparent;
  color: var(--text-darkroom-main);
  border-color: var(--border-darkroom-strong);
}

.btn-outline:hover {
  background: var(--bg-darkroom-inner);
}

.btn-ghost {
  background: transparent;
  color: var(--text-darkroom-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--bg-darkroom-inner);
  color: var(--text-darkroom-main);
}

.btn-sm {
  min-height: 34px;
  padding: 0.25rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-lg {
  min-height: 48px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

@media (max-width: 640px) {
  .btn:not(.btn-sm) {
    width: 100%;
    min-height: 44px;
  }
}

/* Modal */
.feedback-modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.feedback-modal-dialog {
  background: var(--modal-bg);
  color: var(--text-darkroom-main);
  border: 1px solid var(--border-darkroom-subtle);
  border-radius: 1rem;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  animation: modalPop 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.feedback-modal-title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0;
}

.feedback-modal-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-darkroom-muted);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 0.375rem;
}

.feedback-modal-body {
  padding: 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-darkroom-muted);
}

.feedback-modal-footer {
  display: flex;
  justify-content: flex-end;
  padding: 0.875rem 1.25rem;
  border-top: 1px solid var(--border-darkroom-subtle);
  background: var(--bg-darkroom-inner);
}