:root {
  --bg: #0f172a;
  --bg-card: #111827;
  --bg-alt: #020617;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.15);
  --accent-strong: #16a34a;
  --danger: #f97373;
  --danger-soft: rgba(248, 113, 113, 0.1);
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --border-subtle: #1f2937;
  --radius-lg: 16px;
  --radius-md: 10px;
  --transition-fast: 0.15s ease-out;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.45);
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #1e293b 0, #020617 55%, #000 100%);
  color: var(--text-main);
}

.app-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

.app-header {
  text-align: center;
  margin-bottom: 24px;
}

.app-header h1 {
  font-size: 1.9rem;
  margin: 0 0 8px;
  letter-spacing: 0.03em;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card {
  background: linear-gradient(135deg, var(--bg-card), #020617);
  border-radius: var(--radius-lg);
  padding: 20px 22px 22px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
  margin-bottom: 20px;
}

.card h2 {
  margin-top: 0;
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.success-card {
  border-color: var(--accent);
  background: radial-gradient(circle at top left, var(--accent-soft), var(--bg-card));
}

/* Upload / validação */

.upload-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 12px 0 10px;
}

.upload-row input[type="file"] {
  flex: 1;
  padding: 6px 8px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 0.9rem;
}

/* Botões */

button {
  border-radius: var(--radius-md);
  border: none;
  padding: 8px 16px;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 500;
  transition: background-color var(--transition-fast), transform 0.05s ease-out,
    box-shadow var(--transition-fast);
}

button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #0b1120;
  box-shadow: 0 10px 25px rgba(34, 197, 94, 0.32);
}

button.primary:hover {
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  transform: translateY(-1px);
  box-shadow: 0 14px 35px rgba(34, 197, 94, 0.4);
}

button.secondary {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

button.secondary:hover {
  background: var(--accent-soft);
}

button:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
  box-shadow: none;
}

/* Barra de progresso */

.progress-wrapper {
  margin-top: 10px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: #020617;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid #1f2937;
}

.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 0.25s ease-out;
}

.progress-text {
  display: block;
  margin-top: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Resultados */

.validation-result {
  margin-top: 10px;
  font-size: 0.9rem;
}

.error-text {
  color: var(--danger);
  background: var(--danger-soft);
  padding: 8px 10px;
  border-radius: var(--radius-md);
}

.success-text {
  color: var(--accent);
  background: var(--accent-soft);
  padding: 8px 10px;
  border-radius: var(--radius-md);
}

.error-list {
  margin-top: 10px;
  padding-left: 18px;
  max-height: 260px;
  overflow: auto;
  font-size: 0.85rem;
}

.error-list li {
  margin-bottom: 4px;
}

.badge {
  display: inline-block;
  padding: 2px 6px;
  font-size: 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  margin-right: 4px;
}

/* Conversor */

.row-inline {
  display: flex;
  gap: 16px;
  margin-top: 10px;
}

.row-wrap {
  flex-wrap: wrap;
}

.form-group {
  margin-bottom: 4px;
}

.form-group.inline {
  display: flex;
  flex-direction: column;
}

.form-group.inline.small {
  max-width: 200px;
}

.form-group.inline.grow {
  flex: 1;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 6px 8px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-alt);
  color: var(--text-main);
  font-size: 0.9rem;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-size: 0.83rem;
}

.checkbox-group input[type="checkbox"] {
  margin-right: 4px;
}

.actions-row {
  margin-top: 16px;
}

.log-container {
  margin-top: 18px;
}

.log-box {
  width: 100%;
  display: block;

  background: #020617;
  color: var(--text-main);

  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);

  padding: 10px 12px;

  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.8rem;
  line-height: 1.35;

  height: 320px;        /* mais previsível que max-height em textarea */
  overflow: auto;

  resize: vertical;     /* deixa o usuário aumentar */
  white-space: pre-wrap;
}


/* Util */

.hidden {
  display: none;
}

/* Responsivo */

@media (max-width: 768px) {
  .upload-row {
    flex-direction: column;
    align-items: stretch;
  }

  .row-inline {
    flex-direction: column;
  }

  .form-group.inline.small {
    max-width: 100%;
  }

  .app-header h1 {
    font-size: 1.6rem;
  }
}