*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Container principal já deve existir no header, mas garantimos padding responsivo */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* HEADER DA FERRAMENTA */
.tool-header {
  text-align: center;
  padding: clamp(24px, 6vw, 48px) 0 clamp(16px, 4vw, 32px);
}
.tool-header h1 {
  font-size: clamp(24px, 6vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-color);
  margin-bottom: 12px;
  word-break: break-word;
}
.badge {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  font-size: 0.65em;
  padding: 4px 10px;
  border-radius: 40px;
  color: white;
  vertical-align: middle;
  margin-left: 6px;
  display: inline-block;
}
.lead {
  font-size: clamp(0.9rem, 3vw, 1.1rem);
  color: var(--gray);
  max-width: 700px;
  margin: 0 auto;
  padding: 0 12px;
}

/* GRID PRINCIPAL (2 colunas no desktop) */
.resizer-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  margin: 32px 0 48px;
}
.main-panel {
  display: flex;
  flex-direction: column;
  gap: 28px;
  min-width: 0; /* Evita overflow de conteúdo flex */
}

/* DROPZONE */
.dropzone-modern {
  background: var(--card-bg);
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
  padding: clamp(24px, 6vw, 48px) clamp(16px, 4vw, 24px);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--card-shadow);
}
.dropzone-modern:hover {
  border-color: var(--primary);
  background: rgba(67, 97, 238, 0.05);
  transform: translateY(-2px);
}
.dropzone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.icon-lg {
  font-size: clamp(36px, 10vw, 48px);
  background: var(--bg-light);
  width: clamp(60px, 15vw, 80px);
  height: clamp(60px, 15vw, 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 60px;
  margin-bottom: 8px;
}
.dropzone-content h3 {
  font-size: clamp(1rem, 4vw, 1.3rem);
  font-weight: 600;
}
.dropzone-content p {
  color: var(--gray);
  font-size: clamp(0.75rem, 3vw, 0.9rem);
}

/* GALERIA */
.image-gallery {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 16px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
}
.gallery-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.gallery-header h3 {
  font-size: clamp(1rem, 4vw, 1.2rem);
  font-weight: 600;
}
.btn-text {
  background: none;
  border: none;
  color: var(--gray);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 30px;
  transition: var(--transition);
}
.btn-text:hover {
  background: var(--bg-light);
  color: var(--danger);
}
.thumbnails-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 16px;
  max-height: 400px;
  overflow-y: auto;
  padding: 4px;
}
/* Ajuste para telas muito pequenas: thumbnails mais compactas */
@media (max-width: 480px) {
  .thumbnails-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
  }
}
.thumbnail-card {
  background: var(--bg-light);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.thumbnail-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.thumbnail-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: #f1f5f9;
}
.thumbnail-info {
  padding: 8px 8px 4px;
  font-size: 0.7rem;
  display: flex;
  justify-content: space-between;
  color: var(--gray);
  flex-wrap: wrap;
  gap: 4px;
}
.thumbnail-actions {
  display: flex;
  justify-content: space-between;
  padding: 4px 8px 8px;
  gap: 8px;
}
.btn-small {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 6px 6px;
  font-size: 0.7rem;
  cursor: pointer;
  transition: var(--transition);
  flex: 1;
  color: var(--text-color);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
@media (max-width: 480px) {
  .btn-small {
    font-size: 0.65rem;
    padding: 4px 4px;
  }
}
.btn-small:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* PAINEL DE CONTROLE */
.control-panel {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: clamp(16px, 4vw, 24px);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
}
.panel-section {
  margin-bottom: 28px;
}
.panel-section h4 {
  font-size: clamp(0.9rem, 3.5vw, 1rem);
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.input-group {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.input-group input {
  flex: 1;
  min-width: 80px;
  padding: 12px 12px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 0.9rem;
  transition: var(--transition);
  background: var(--input-bg, var(--bg-light));
  color: var(--text-color);
}
@media (max-width: 480px) {
  .input-group {
    flex-direction: column;
    align-items: stretch;
  }
  .input-group input {
    width: 100%;
  }
  .lock-icon {
    align-self: center;
    width: fit-content;
  }
}
.input-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}
.lock-icon {
  background: var(--bg-light);
  padding: 10px;
  border-radius: 12px;
  cursor: pointer;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  font-size: 1.1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.lock-icon:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}
.select-modern {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--input-bg, var(--bg-light));
  font-size: 0.9rem;
  color: var(--text-color);
  cursor: pointer;
  margin-bottom: 16px;
}
label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 8px;
  color: var(--gray);
}
input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 10px;
  background: var(--border-color);
  -webkit-appearance: none;
}
input[type="range"]:focus {
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* PROGRESSO */
#progressContainer {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
}
#progressBar {
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
}

/* BOTÕES DE AÇÃO */
.action-bar {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}
@media (max-width: 480px) {
  .btn {
    padding: 10px 18px;
    font-size: 0.8rem;
    white-space: normal;
    flex: 1;
  }
  .action-bar {
    flex-direction: column;
  }
}
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 6px rgba(67, 97, 238, 0.2);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}
.btn-success {
  background: var(--success);
  color: white;
}
.btn-success:hover {
  background: #0e9f6e;
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-color);
}
.btn-outline:hover {
  background: var(--bg-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* SIDEBAR */
.sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.info-card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
}
.info-card h4 {
  font-size: clamp(1rem, 4vw, 1.1rem);
  margin-bottom: 16px;
  font-weight: 600;
}
.info-card ul {
  list-style: none;
  padding-left: 0;
}
.info-card li {
  padding-left: 24px;
  position: relative;
  margin-bottom: 12px;
  font-size: clamp(0.8rem, 3vw, 0.9rem);
  color: var(--gray);
  word-break: break-word;
}
.info-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}
.info-card p {
  font-size: clamp(0.9rem, 3.5vw, 1rem);
  color: var(--text-color);
}

/* ===== BREAKPOINTS PRINCIPAIS ===== */

/* Telas médias (tablet e abaixo) */
@media (max-width: 900px) {
  .resizer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .sidebar-panel {
    order: 2;
  }
  .container {
    padding: 0 20px;
  }
}

/* Telas pequenas (mobile landscape) */
@media (max-width: 640px) {
  .tool-header {
    padding: 20px 0 12px;
  }
  .control-panel {
    padding: 18px;
  }
  .dropzone-modern {
    padding: 32px 16px;
  }
  .icon-lg {
    width: 60px;
    height: 60px;
    font-size: 36px;
  }
  .gallery-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Telas muito pequenas (celulares em retrato, < 480px) */
@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  .tool-header h1 {
    line-height: 1.2;
  }
  .badge {
    display: inline-block;
    margin-top: 6px;
    margin-left: 0;
  }
  .lead {
    font-size: 0.85rem;
  }
  .info-card {
    padding: 16px;
  }
  .info-card li {
    font-size: 0.75rem;
  }
  #progressContainer {
    padding: 14px;
  }
  .progress-status,
  .progress-percent {
    font-size: 0.8rem;
  }
}

/* Ajustes para orientação landscape em mobile */
@media (max-width: 800px) and (orientation: landscape) {
  .thumbnails-grid {
    max-height: 250px;
  }
  .control-panel {
    padding: 16px;
  }
  .panel-section {
    margin-bottom: 16px;
  }
}

/* SCROLLBAR PERSONALIZADA */
.thumbnails-grid::-webkit-scrollbar {
  width: 6px;
}
.thumbnails-grid::-webkit-scrollbar-track {
  background: var(--bg-light);
  border-radius: 8px;
}
.thumbnails-grid::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 8px;
}