:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #182234;
  --accent-color: #38bdf8;
  --accent-hover: #0284c7;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --border-hover: #475569;
  --success-color: #22c55e;
  --warning-color: #f59e0b;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  width: 100%;
}

.app-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-color);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.3rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.app-header h1 {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 650px;
  margin: 0 auto;
}

/* Dropzone */
.dropzone {
  position: relative;
  background: var(--bg-secondary);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  overflow: hidden;
}

.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--accent-color);
  background: rgba(56, 189, 248, 0.05);
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.15);
}

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-icon {
  width: 56px;
  height: 56px;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.dropzone h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}

.dropzone p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.file-hint {
  display: block;
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.8;
}

/* Settings Bar */
.settings-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.75rem;
  margin-top: 1.5rem;
}

.setting-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.setting-item label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.range-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.range-group input[type="range"] {
  accent-color: var(--accent-color);
  cursor: pointer;
  width: 110px;
}

.range-group span {
  font-family: monospace;
  font-size: 0.95rem;
  min-width: 40px;
  color: var(--accent-color);
  font-weight: 700;
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--warning-color);
  display: inline-block;
}

.status-indicator.active {
  background: var(--success-color);
  box-shadow: 0 0 8px var(--success-color);
}

.status-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Processing */
.processing-overlay {
  text-align: center;
  padding: 3rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-top: 2rem;
  border: 1px solid var(--border-color);
}

.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1.2rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Results */
.results-container {
  margin-top: 2.5rem;
}

.original-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-color);
  border-radius: var(--radius-sm);
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  gap: 1rem;
}

.original-summary strong {
  color: var(--accent-color);
}

.actions-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.actions-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-color);
  color: #04121e;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--border-color);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
}

/* Grid de Resoluções */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.card-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.card-resolution {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.card-preview {
  width: 100%;
  height: 190px;
  background: #090d16;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.card-preview img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.format-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  margin-bottom: 0.6rem;
  font-size: 0.85rem;
}

.format-name {
  font-weight: 700;
  color: var(--accent-color);
}

.format-size {
  color: var(--text-muted);
}

.savings-badge {
  color: var(--success-color);
  font-weight: 600;
}

.card-actions {
  margin-top: auto;
  padding-top: 1rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Bloco de Código */
.code-generator {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.code-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

pre {
  background: #090d16;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.2rem;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  color: #38bdf8;
  line-height: 1.5;
}

/* Footer */
.app-footer {
  margin-top: auto;
  text-align: center;
  padding: 2rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
  .app-container {
    padding: 1.5rem 1rem;
  }
  .app-header h1 {
    font-size: 1.8rem;
  }
  .settings-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
}