/* ============================================
   Compatibilizador de Fixadores
   Design System — Linear-Inspired Dark
   v1.0.0
   ============================================ */

/* --- Tokens --- */
:root {
  /* Colors */
  --color-bg: #0a0a0b;
  --color-bg-elevated: #111113;
  --color-bg-surface: #18181b;
  --color-bg-hover: #1e1e22;
  --color-border: #27272a;
  --color-border-focus: #7c3aed;
  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --color-accent: #7c3aed;
  --color-accent-hover: #6d28d9;
  --color-accent-soft: rgba(124, 58, 237, 0.12);
  --color-success: #22c55e;
  --color-success-soft: rgba(34, 197, 94, 0.12);
  --color-warning: #eab308;
  --color-warning-soft: rgba(234, 179, 8, 0.12);
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-normal: 200ms ease;
}

/* --- Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

select, input {
  font-family: inherit;
  font-size: inherit;
}

/* --- Header --- */
.header {
  padding: var(--space-2xl) var(--space-lg) var(--space-lg);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.header__brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.header__icon {
  font-size: 1.5rem;
  opacity: 0.8;
}

.header__title {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.header__subtitle {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  max-width: 480px;
  margin: 0 auto;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
}

.tab {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.tab:hover {
  color: var(--color-text-secondary);
}

.tab--active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

/* --- Tab Content --- */
.main {
  flex: 1;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
}

.tab-content {
  padding: var(--space-lg);
  animation: fadeIn 200ms ease;
}

.tab-content[hidden] {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Form --- */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form__loading {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: var(--space-xl) 0;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form__label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form__select {
  appearance: none;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  padding-right: 36px;
  color: var(--color-text);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%2371717a'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
  width: 100%;
}

.form__select:hover {
  border-color: var(--color-text-muted);
}

.form__select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form__select:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.form__hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.form__hint a {
  color: var(--color-accent);
  font-weight: 500;
}

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px var(--space-lg);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  width: 100%;
  margin-top: var(--space-sm);
}

.btn--primary {
  background: var(--color-accent);
  color: white;
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}

.btn--primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

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

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

.btn--sm {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8rem;
  width: auto;
}

/* --- Result --- */
.result {
  margin-top: var(--space-lg);
}

.result__card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  animation: slideUp 250ms ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.result__title {
  font-size: 1.1rem;
  font-weight: 600;
}

.result__badges {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.result__badge {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.result__badge--system {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.result__badge--pro {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.result__section {
  margin-bottom: var(--space-md);
}

.result__section:last-child {
  margin-bottom: 0;
}

.result__section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.result__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
  gap: var(--space-sm);
}

.result__row:last-child {
  border-bottom: none;
}

.result__label {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.result__value {
  font-size: 0.85rem;
  font-weight: 500;
  text-align: right;
  word-break: break-word;
}

.result__value--mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.result__value--highlight {
  color: var(--color-accent);
  font-size: 1.15rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.result__value--norm {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* --- Lists --- */
.result__list {
  list-style: none;
  padding: 0;
}

.result__list li {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  padding: 4px 0;
  padding-left: var(--space-md);
  position: relative;
}

.result__list li::before {
  content: "\2192";
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
}

/* --- Torque Table --- */
.torque-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-top: var(--space-xs);
}

.torque-table th {
  text-align: left;
  padding: 6px var(--space-sm);
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.65rem;
  border-bottom: 1px solid var(--color-border);
}

.torque-table td {
  padding: 6px var(--space-sm);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.torque-table tr:last-child td {
  border-bottom: none;
}

.torque-table tr:hover td {
  background: var(--color-bg-hover);
}

.torque-table .torque-value {
  color: var(--color-accent);
  font-weight: 700;
}

/* --- Norms Grid --- */
.norms-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px var(--space-md);
  font-size: 0.8rem;
  margin-top: var(--space-xs);
}

.norms-grid__label {
  color: var(--color-text-muted);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.norms-grid__value {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* --- Note Box --- */
.note-box {
  background: var(--color-bg-surface);
  border-left: 3px solid var(--color-warning);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
}

.note-box--info {
  border-left-color: var(--color-info);
}

/* --- Footer --- */
.footer {
  padding: var(--space-lg);
  text-align: center;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  line-height: 1.8;
}

.footer__disclaimer {
  max-width: 520px;
  margin: 0 auto;
}

.footer__sources {
  margin-top: var(--space-xs);
  opacity: 0.7;
  font-size: 0.7rem;
}

.footer__copy {
  margin-top: var(--space-sm);
  opacity: 0.5;
}

/* --- Utilities --- */
[hidden] {
  display: none !important;
}

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

.text-mono {
  font-family: var(--font-mono);
}

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .header {
    padding: var(--space-lg) var(--space-md) var(--space-md);
  }

  .header__title {
    font-size: 1.2rem;
  }

  .header__subtitle {
    font-size: 0.8rem;
  }

  .tabs {
    padding: var(--space-sm) var(--space-md) 0;
  }

  .tab {
    font-size: 0.8rem;
    padding: var(--space-xs) var(--space-sm);
  }

  .tab-content {
    padding: var(--space-md);
  }

  .result__card {
    padding: var(--space-md);
  }

  .result__header {
    flex-direction: column;
    align-items: flex-start;
  }

  .result__row {
    flex-direction: column;
    gap: 2px;
  }

  .result__value {
    text-align: left;
  }

  .torque-table {
    font-size: 0.7rem;
  }

  .torque-table th,
  .torque-table td {
    padding: 4px;
  }

  .norms-grid {
    gap: 2px var(--space-sm);
  }

  .btn--sm {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
  }
}

/* --- Print --- */
@media print {
  body {
    background: white;
    color: black;
  }

  .header, .tabs, .footer, .btn {
    display: none;
  }

  .result__card {
    border: 1px solid #ccc;
    box-shadow: none;
  }
}