/* ============================================================
   UPLOAD.CSS: PANTALLA INICIAL Y ZONA DE ARRASTRE (DROPZONE)
   SaaS Dark Design System (Zinc / Slate)
   ============================================================ */

.welcome-screen {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  height: calc(100vh - 52px);
  padding: 24px 20px 80px 20px;
  background-color: var(--bg-base);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.welcome-screen::-webkit-scrollbar {
  width: 6px;
}

.welcome-screen::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
}

.drop-zone {
  max-width: 650px;
  width: 100%;
  border: 1px dashed var(--border-color);
  border-radius: 12px;
  padding: 40px 28px;
  text-align: center;
  background-color: var(--bg-surface);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.drop-zone.dragover {
  border-color: var(--primary);
  background-color: rgba(59, 130, 246, 0.06);
  transform: scale(1.005);
}

.drop-icon {
  width: 72px;
  height: 72px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
}

.drop-zone h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #ffffff;
}

.drop-zone p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 24px;
}

.features-hint {
  margin-top: 30px;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  text-align: left;
}

.feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

.feature-item .icon {
  font-size: 1.1rem;
}

/* ============================================================
   CARGA DUAL: ZIP + DOCUMENTO DE FIRMA
   ============================================================ */
.dual-drop-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
  margin-top: 12px;
}

@media (max-width: 820px) {
  .dual-drop-grid {
    grid-template-columns: 1fr;
  }
}

.drop-zone-card {
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  padding: 20px 16px;
  text-align: center;
  background-color: var(--bg-card);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  min-height: 220px;
  gap: 14px;
}

.drop-zone-card.dragover {
  border-color: var(--primary);
  background-color: rgba(59, 130, 246, 0.08);
  transform: translateY(-1px);
}

.drop-zone-card.loaded {
  border: 1px solid rgba(16, 185, 129, 0.4);
  background-color: rgba(16, 185, 129, 0.05);
}

.drop-zone-header {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.drop-zone-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.zip-icon {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.25);
  color: #fbbf24;
}

.signature-icon {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: #60a5fa;
}

.drop-zone-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
  text-align: left;
  letter-spacing: -0.01em;
}

.drop-zone-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: left;
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.drop-zone-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.drop-zone-status {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 10px 14px;
  border-radius: 8px;
  width: 100%;
  text-align: left;
}

.drop-zone-status .status-icon {
  color: #34d399;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.status-info {
  overflow: hidden;
  flex: 1;
}

.status-name {
  font-size: 0.84rem;
  font-weight: 600;
  color: #ffffff;
  word-break: break-all;
  line-height: 1.3;
}

.status-details {
  font-size: 0.72rem;
  color: #34d399;
  margin-top: 1px;
}

/* BOTÓN DE CONFIRMACIÓN Y AVANCE */
.confirm-uploads-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  width: 100%;
}

#btn-confirm-uploads {
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

#btn-confirm-uploads:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-dim);
  box-shadow: none;
}

#btn-confirm-uploads:not(:disabled) {
  background: var(--primary);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
  cursor: pointer;
}

#btn-confirm-uploads:not(:disabled):hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.45);
  transform: translateY(-1px);
}

.confirm-hint {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-align: center;
}