:root {
  --bg-dark: #090d16;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 35, 54, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.4);

  --accent-cyan: #06b6d4;
  --accent-purple: #a855f7;

  --color-valid: #10b981;
  --color-valid-bg: rgba(16, 185, 129, 0.12);
  --color-valid-border: rgba(16, 185, 129, 0.3);

  --color-invalid: #ef4444;
  --color-invalid-bg: rgba(239, 68, 68, 0.12);
  --color-invalid-border: rgba(239, 68, 68, 0.3);

  --color-catch-all: #f59e0b;
  --color-catch-all-bg: rgba(245, 158, 11, 0.12);
  --color-catch-all-border: rgba(245, 158, 11, 0.3);

  --color-disposable: #f97316;
  --color-disposable-bg: rgba(249, 115, 22, 0.12);
  --color-disposable-border: rgba(249, 115, 22, 0.3);

  --color-risky: #8b5cf6;
  --color-risky-bg: rgba(139, 92, 246, 0.12);
  --color-risky-border: rgba(139, 92, 246, 0.3);

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --font-main: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.08) 0px, transparent 50%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* Layout Estrutural */
.app-layout {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background: rgba(13, 17, 28, 0.95);
  border-right: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  padding: 0 8px;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
}

.brand-text h2 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.brand-text h2 span {
  color: var(--accent-cyan);
}

.brand-tag {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.nav-item svg {
  width: 18px;
  height: 18px;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.3);
  color: #818cf8;
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-indicator .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-valid);
  box-shadow: 0 0 8px var(--color-valid);
}

/* Área Principal */
.main-content {
  flex: 1;
  padding: 32px 40px;
  overflow-y: auto;
  max-width: 1280px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 28px;
}

.header-info h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.header-info p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.engine-badge {
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #a5b4fc;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
}

/* Tabs */
.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.25s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards & Glassmorphism */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  padding: 28px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  margin-bottom: 24px;
}

/* Upload Card */
.upload-card {
  text-align: center;
  border: 2px dashed rgba(99, 102, 241, 0.3);
  background: rgba(18, 24, 38, 0.5);
  transition: all 0.3s ease;
  cursor: pointer;
}

.upload-card:hover, .upload-card.drag-over {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.upload-icon svg {
  width: 32px;
  height: 32px;
}

.upload-card h3 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.upload-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.divider-text {
  position: relative;
  margin: 28px 0;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.divider-text::before, .divider-text::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 38%;
  height: 1px;
  background: var(--border-color);
}
.divider-text::before { left: 0; }
.divider-text::after { right: 0; }

.manual-input-box textarea {
  width: 100%;
  height: 120px;
  background: rgba(10, 14, 23, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 12px;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s ease;
}

.manual-input-box textarea:focus {
  border-color: var(--primary);
}

.manual-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 12px;
}

/* Botões */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-gradient {
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  color: white;
}
.btn-gradient:hover {
  opacity: 0.95;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-success {
  background: var(--color-valid);
  color: white;
}
.btn-success:hover {
  background: #059669;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* Barra de Progresso e Métricas */
.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.progress-stats-summary {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.progress-bar-wrapper {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 24px;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
  border-radius: 20px;
  transition: width 0.3s ease;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.metric-box {
  padding: 16px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
}

.metric-box.valid { background: var(--color-valid-bg); border: 1px solid var(--color-valid-border); }
.metric-box.invalid { background: var(--color-invalid-bg); border: 1px solid var(--color-invalid-border); }
.metric-box.catch_all { background: var(--color-catch-all-bg); border: 1px solid var(--color-catch-all-border); }
.metric-box.disposable { background: var(--color-disposable-bg); border: 1px solid var(--color-disposable-border); }
.metric-box.risky { background: var(--color-risky-bg); border: 1px solid var(--color-risky-border); }

.metric-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.metric-val {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  line-height: 1.2;
}

.metric-box.valid .metric-val { color: var(--color-valid); }
.metric-box.invalid .metric-val { color: var(--color-invalid); }
.metric-box.catch_all .metric-val { color: var(--color-catch-all); }
.metric-box.disposable .metric-val { color: var(--color-disposable); }
.metric-box.risky .metric-val { color: var(--color-risky); }

.metric-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Linha de Exportação */
.export-actions-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px;
  background: rgba(10, 14, 23, 0.5);
  border-radius: 8px;
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Tabela de Resultados */
.table-wrapper {
  max-height: 380px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  text-align: left;
}

.data-table th {
  background: #0f1524;
  color: var(--text-muted);
  font-weight: 600;
  padding: 12px 14px;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.data-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Badges de Status */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.badge.valid { background: var(--color-valid-bg); color: var(--color-valid); border: 1px solid var(--color-valid-border); }
.badge.invalid { background: var(--color-invalid-bg); color: var(--color-invalid); border: 1px solid var(--color-invalid-border); }
.badge.catch_all { background: var(--color-catch-all-bg); color: var(--color-catch-all); border: 1px solid var(--color-catch-all-border); }
.badge.disposable { background: var(--color-disposable-bg); color: var(--color-disposable); border: 1px solid var(--color-disposable-border); }
.badge.risky { background: var(--color-risky-bg); color: var(--color-risky); border: 1px solid var(--color-risky-border); }

/* ABA 2: Single Checker */
.single-checker-card {
  max-width: 850px;
}

.single-checker-card h3 {
  font-size: 1.3rem;
  margin-bottom: 6px;
}

.single-checker-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 24px;
}

.single-input-row {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.single-input-row input {
  flex: 1;
  background: rgba(10, 14, 23, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px 16px;
  color: var(--text-main);
  font-size: 1rem;
  font-family: var(--font-mono);
  outline: none;
  transition: border-color 0.2s ease;
}

.single-input-row input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.single-result-box {
  background: rgba(10, 14, 23, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 24px;
  animation: fadeIn 0.3s ease;
}

.single-res-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.single-res-title h2 {
  font-size: 1.35rem;
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-badge.valid { background: var(--color-valid-bg); color: var(--color-valid); border: 1px solid var(--color-valid-border); }
.status-badge.invalid { background: var(--color-invalid-bg); color: var(--color-invalid); border: 1px solid var(--color-invalid-border); }
.status-badge.catch_all { background: var(--color-catch-all-bg); color: var(--color-catch-all); border: 1px solid var(--color-catch-all-border); }
.status-badge.disposable { background: var(--color-disposable-bg); color: var(--color-disposable); border: 1px solid var(--color-disposable-border); }
.status-badge.risky { background: var(--color-risky-bg); color: var(--color-risky); border: 1px solid var(--color-risky-border); }

.score-circle-box {
  text-align: center;
}

.score-number {
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  line-height: 1;
}

.score-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-top: 4px;
}

.single-res-reason {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 6px;
  border-left: 3px solid var(--primary);
}

.diagnostics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.diag-item {
  background: rgba(18, 24, 38, 0.5);
  border: 1px solid var(--border-color);
  padding: 12px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
}

.diag-name {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.diag-value {
  font-size: 0.9rem;
  font-weight: 600;
}

.diag-value.code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  word-break: break-all;
}

.typo-box {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 12px 16px;
  border-radius: 8px;
  color: #fbbf24;
  font-size: 0.9rem;
}

.typo-highlight {
  font-weight: 700;
  text-decoration: underline;
  cursor: pointer;
}

/* ABA 3: Settings */
.settings-card {
  max-width: 850px;
}

.settings-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-cyan);
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"] {
  background: rgba(10, 14, 23, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
}

.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.checkbox-wrapper input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.help-text {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.settings-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.feedback-msg {
  margin-top: 14px;
  font-size: 0.88rem;
  padding: 10px 14px;
  border-radius: 6px;
  display: none;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 8px;
  background: #1e293b;
  color: white;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 999;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

@media (max-width: 900px) {
  .app-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .main-content {
    padding: 20px;
  }
  .settings-form-grid {
    grid-template-columns: 1fr;
  }
  .form-group.full-width {
    grid-column: span 1;
  }
}