/* ============================================================
   FileVault — upload.css
   Drop Zone · Cola de Carga · Progreso · Preview
   ============================================================ */

/* ══════════════════════════════════════════════════
   DROP ZONE
═════════════════════════════════════════════════ */
.drop-zone {
  position: relative;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  background: var(--surface-card);
  padding: var(--space-16) var(--space-8);
  text-align: center;
  cursor: pointer;
  transition:
    border-color var(--transition-base),
    background var(--transition-base),
    box-shadow var(--transition-base);
  overflow: hidden;
  margin-bottom: var(--space-8);
  outline: none;
}

/* Fondo cuadriculado interno */
.drop-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
  transition: opacity var(--transition-base);
}

/* Viñeta con degradado desde los bordes */
.drop-zone::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 70% 60% at 50% 50%,
    transparent 30%,
    var(--surface-card) 100%
  );
  pointer-events: none;
  z-index: 1;
}

.drop-zone-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

/* ── Icono central ── */
.drop-icon {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-arrow {
  font-size: 2rem;
  color: var(--orange);
  position: relative;
  z-index: 2;
  transition: transform var(--transition-spring);
}

/* Hexágono giratorio de fondo */
.drop-hex-ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  transform: rotate(0deg);
  transition: transform 0.6s ease;
  opacity: 0.6;
}

.drop-hex-ring::before {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid var(--orange-subtle);
  border-radius: var(--radius-md);
  transform: rotate(15deg);
}

/* ── Títulos ── */
.drop-title {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-wider);
  color: var(--text-primary);
  text-transform: uppercase;
  transition: color var(--transition-fast);
}

.drop-subtitle {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  color: var(--text-secondary);
}

.drop-browse {
  color: var(--orange);
  font: inherit;
  cursor: pointer;
  border-bottom: 1px solid var(--orange-dim);
  padding-bottom: 1px;
  transition: opacity var(--transition-fast);
}

.drop-browse:hover { opacity: 0.75; }

/* Tags de especificaciones */
.drop-specs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.spec-tag {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--text-tertiary);
  text-transform: uppercase;
  padding: 3px var(--space-3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--surface-inset);
}

.spec-sep {
  color: var(--border-strong);
  font-size: 0.6rem;
}

/* ── Estado: Hover / Focus ── */
.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: var(--border-accent);
  background: var(--surface-overlay);
  box-shadow: 0 0 0 4px var(--orange-subtle), var(--shadow-accent);
}

.drop-zone:hover .drop-arrow,
.drop-zone:focus-visible .drop-arrow {
  transform: translateY(-4px);
}

.drop-zone:hover .drop-hex-ring,
.drop-zone:focus-visible .drop-hex-ring {
  transform: rotate(45deg);
  border-color: var(--orange);
}

.drop-zone:hover .drop-title,
.drop-zone:focus-visible .drop-title {
  color: var(--orange);
}

/* ── Estado: Drag Over ── */
.drop-zone.drag-over {
  border-color: var(--orange);
  background: var(--surface-overlay);
  box-shadow:
    0 0 0 3px var(--orange-glow),
    inset 0 0 40px var(--orange-subtle),
    var(--shadow-accent);
  animation: dropPulse 0.8s ease-in-out infinite alternate;
}

.drop-zone.drag-over::before { opacity: 0.3; }

.drop-zone.drag-over .drop-arrow {
  transform: translateY(-8px) scale(1.2);
  color: var(--orange-bright);
}

.drop-zone.drag-over .drop-hex-ring {
  transform: rotate(90deg);
  border-color: var(--orange);
  box-shadow: 0 0 12px var(--orange);
}

.drop-zone.drag-over .drop-title {
  color: var(--orange-bright);
}

@keyframes dropPulse {
  from { box-shadow: 0 0 0 3px var(--orange-glow), inset 0 0 30px var(--orange-subtle); }
  to   { box-shadow: 0 0 0 6px var(--orange-glow), inset 0 0 60px var(--orange-subtle); }
}

/* ── Estado: Drag Accept (tipo válido) ── */
.drop-zone.drag-accept { border-color: var(--success); }
.drop-zone.drag-accept .drop-arrow { color: var(--success); }

/* ── Estado: Drag Reject (tipo inválido) ── */
.drop-zone.drag-reject {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px var(--danger-dim);
  animation: shakeReject 0.4s ease;
}

.drop-zone.drag-reject .drop-title { color: var(--danger); }

@keyframes shakeReject {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

/* Input oculto fuera de pantalla — .click() funciona fiablemente
   y los eventos de drag/click llegan directamente al dropZone */
.file-input-hidden {
  position: fixed;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

/* ══════════════════════════════════════════════════
   UPLOAD QUEUE — Cola de carga
═════════════════════════════════════════════════ */
.upload-queue {
  background: var(--surface-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.upload-queue::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(to right, var(--orange), transparent 40%);
  opacity: 0.4;
}

.queue-list {
  max-height: 400px;
  overflow-y: auto;
}

.queue-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

/* ── Item de la cola ── */
.queue-item {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  grid-template-rows: auto auto;
  align-items: center;
  column-gap: var(--space-4);
  row-gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  animation: queueItemIn 0.22s ease forwards;
  position: relative;
  overflow: hidden;
  transition: background var(--transition-fast);
}

.queue-item:last-child { border-bottom: none; }
.queue-item:hover { background: var(--surface-hover); }

/* Barra de fondo de progreso (full width) */
.queue-item::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: var(--progress, 0%);
  background: var(--orange-subtle);
  transition: width 0.3s ease;
  pointer-events: none;
}

.queue-item.uploading::before { opacity: 1; }
.queue-item.complete::before  { background: var(--success-dim); width: 100%; }
.queue-item.error::before     { background: var(--danger-dim); width: 100%; }

@keyframes queueItemIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Icono de tipo de archivo */
.queue-file-icon {
  grid-row: 1 / 3;
  grid-column: 1;
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.queue-item.uploading .queue-file-icon {
  border-color: var(--border-accent);
  color: var(--orange);
  animation: iconPulse 1.2s ease-in-out infinite;
}

.queue-item.complete .queue-file-icon {
  border-color: rgba(76,175,125,0.4);
  color: var(--success);
}

.queue-item.error .queue-file-icon {
  border-color: rgba(232,64,64,0.4);
  color: var(--danger);
}

@keyframes iconPulse {
  0%, 100% { box-shadow: none; }
  50%       { box-shadow: 0 0 8px var(--orange-glow); }
}

/* Info del archivo */
.queue-file-info {
  grid-row: 1;
  grid-column: 2;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.queue-file-name {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.queue-file-meta {
  display: flex;
  gap: var(--space-3);
  margin-top: 2px;
  align-items: center;
  flex-wrap: wrap;
}

.queue-file-size {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-tertiary);
  letter-spacing: 0.03em;
}

.queue-file-status {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
}

.queue-file-status.pending   { color: var(--text-tertiary); background: var(--surface-inset); }
.queue-file-status.uploading { color: var(--orange);  background: var(--orange-subtle);  }
.queue-file-status.complete  { color: var(--success); background: var(--success-dim);    }
.queue-file-status.error     { color: var(--danger);  background: var(--danger-dim);     }
.queue-file-status.paused    { color: var(--warning); background: var(--warning-dim);    }

/* Barra de progreso individual */
.queue-progress-wrap {
  grid-row: 2;
  grid-column: 2;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  position: relative;
  z-index: 1;
}

.queue-progress-bar-outer {
  flex: 1;
  height: 3px;
  background: var(--surface-inset);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.queue-progress-bar-inner {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(to right, var(--orange-dim), var(--orange));
  transition: width 0.25s ease;
  position: relative;
  overflow: hidden;
}

/* Efecto shimmer en progreso */
.queue-progress-bar-inner::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 50px;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.4), transparent);
  animation: shimmer 1s linear infinite;
  display: none;
}

.queue-item.uploading .queue-progress-bar-inner::after { display: block; }

@keyframes shimmer {
  from { left: -50px; }
  to   { left: 110%; }
}

.queue-item.complete .queue-progress-bar-inner {
  background: var(--success);
}

.queue-item.error .queue-progress-bar-inner {
  background: var(--danger);
}

.queue-progress-pct {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  min-width: 32px;
  text-align: right;
}

/* Acciones del item */
.queue-item-actions {
  grid-row: 1 / 3;
  grid-column: 3;
  display: flex;
  gap: var(--space-1);
  align-items: center;
  position: relative;
  z-index: 1;
}

.queue-action-btn {
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.queue-action-btn:hover {
  border-color: var(--border-default);
  background: var(--surface-hover);
  color: var(--text-primary);
}

.queue-action-btn.remove:hover {
  border-color: rgba(232,64,64,0.3);
  background: var(--danger-dim);
  color: var(--danger);
}

.queue-action-btn.retry {
  color: var(--orange);
}

.queue-action-btn.retry:hover {
  border-color: var(--border-accent);
  background: var(--orange-subtle);
  color: var(--orange-bright);
}

/* ── Estado uploading total en el header ── */
.upload-progress-global {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--surface-overlay);
  border-top: 1px solid var(--border-subtle);
}

.upload-progress-global.hidden { display: none; }

.global-progress-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  white-space: nowrap;
}

.global-progress-bar-outer {
  flex: 1;
  height: 4px;
  background: var(--surface-inset);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.global-progress-bar-inner {
  height: 100%;
  background: linear-gradient(to right, var(--orange-dim), var(--orange), var(--orange-bright));
  background-size: 200% 100%;
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
  animation: progressShimmer 1.5s linear infinite;
}

@keyframes progressShimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.global-progress-bar-inner.paused {
  animation-play-state: paused;
  background: var(--warning);
}

.global-progress-bar-inner.complete {
  background: var(--success);
  animation: none;
}

.global-progress-pct {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--orange);
  min-width: 38px;
  text-align: right;
  letter-spacing: 0.04em;
}

/* ── Resumen de cola ── */
.queue-summary {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-3) var(--space-5);
  background: var(--surface-inset);
  border-top: 1px solid var(--border-subtle);
}

.queue-summary-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.queue-summary-num {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: 1;
}

.queue-summary-num.orange  { color: var(--orange); }
.queue-summary-num.success { color: var(--success); }
.queue-summary-num.danger  { color: var(--danger); }

.queue-summary-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--text-tertiary);
  text-transform: uppercase;
}

/* ── Preview de imagen ── */
.queue-thumb {
  width: 40px; height: 40px;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  grid-row: 1 / 3;
  grid-column: 1;
  position: relative;
  z-index: 1;
}

/* ══════════════════════════════════════════════════
   ANIMACIÓN DE ENTRADA ARCHIVO AÑADIDO
═════════════════════════════════════════════════ */
@keyframes fileAddedFlash {
  0%   { background: var(--orange-subtle); }
  100% { background: transparent; }
}

.queue-item.just-added {
  animation: queueItemIn 0.22s ease forwards, fileAddedFlash 0.6s ease 0.22s;
}

/* ══════════════════════════════════════════════════
   ESTADOS VACÍOS CON ILUSTRACIÓN INDUSTRIAL
═════════════════════════════════════════════════ */
.drop-state-label {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-widest);
  color: var(--orange);
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0;
  z-index: 3;
  transition: opacity var(--transition-fast);
  white-space: nowrap;
}

.drop-zone.drag-over .drop-state-label { opacity: 1; }
.drop-zone.drag-over .drop-zone-inner  { opacity: 0; }

/* ══════════════════════════════════════════════════
   RESPONSIVE
═════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .drop-zone {
    padding: var(--space-10) var(--space-5);
  }

  .drop-title {
    font-size: var(--font-size-xl);
  }

  .queue-item {
    grid-template-columns: 36px 1fr auto;
  }

  .queue-summary {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .upload-progress-global {
    flex-wrap: wrap;
  }
}