/* ==========================================================================
   Ferramentas.com — main.css
   Design System Tokens, Reset Global, Tipografia e Layout Base
   ========================================================================== */

:root {
  /* Cores Base - Paleta Neutra e Primária */
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;
  --color-surface-subtle: #f1f5f9;
  
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-text-inverse: #ffffff;

  --color-border: #e2e8f0;
  --color-border-subtle: #f1f5f9;
  --color-border-focus: #0f766e;

  /* Cores de Destaque / Marca (Teal Premium) */
  --color-primary: #0f766e;
  --color-primary-hover: #115e59;
  --color-primary-active: #134e4a;
  --color-primary-subtle: #ccfbf1;
  --color-primary-text: #115e59;

  /* Estados e Alertas */
  --color-success: #15803d;
  --color-success-subtle: #dcfce7;
  --color-danger: #b91c1c;
  --color-danger-subtle: #fee2e2;
  --color-warning: #b45309;
  --color-warning-subtle: #fef3c7;

  /* Tipografia */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Escala Tipográfica Fluida */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-md: 1.125rem;   /* 18px */
  --font-size-lg: 1.25rem;    /* 20px */
  --font-size-xl: 1.5rem;     /* 24px */
  --font-size-2xl: 1.875rem;  /* 30px */
  --font-size-3xl: 2.25rem;   /* 36px */
  --font-size-4xl: 3rem;      /* 48px */

  --line-height-tight: 1.25;
  --line-height-base: 1.5;
  --line-height-relaxed: 1.625;

  /* Espaçamentos */
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.25rem;  /* 20px */
  --spacing-6: 1.5rem;   /* 24px */
  --spacing-8: 2rem;     /* 32px */
  --spacing-10: 2.5rem;  /* 40px */
  --spacing-12: 3rem;    /* 48px */
  --spacing-16: 4rem;    /* 64px */

  /* Bordas Arredondadas */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
  --shadow-card-hover: 0 12px 20px -4px rgba(15, 23, 42, 0.1), 0 4px 8px -2px rgba(15, 23, 42, 0.04);

  /* Dimensões de Layout */
  --container-max: 1200px;
  --container-tool: 1040px;
  --header-height: 64px;

  /* Transições Suaves */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Modo Escuro Nativo */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #090d16;
    --color-surface: #111827;
    --color-surface-elevated: #1f2937;
    --color-surface-subtle: #1e293b;

    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;

    --color-border: #1e293b;
    --color-border-subtle: #172033;
    --color-border-focus: #14b8a6;

    --color-primary: #14b8a6;
    --color-primary-hover: #2dd4bf;
    --color-primary-active: #5eead4;
    --color-primary-subtle: rgba(20, 184, 166, 0.15);
    --color-primary-text: #5eead4;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.6);
  }
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Acessibilidade - Indicador de Foco */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   Containers e Estrutura Geral
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.container-tool {
  max-width: var(--container-tool);
}

.site-main {
  flex: 1;
  padding-top: var(--spacing-6);
  padding-bottom: var(--spacing-12);
}

/* ==========================================================================
   Header e Navegação Global
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--font-size-lg);
  letter-spacing: -0.02em;
}

.brand-logo {
  height: 36px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--spacing-5);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  padding: var(--spacing-2) 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
}

.locale-selector {
  display: flex;
  align-items: center;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--spacing-1) var(--spacing-2);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
}

.locale-select {
  background: transparent;
  border: none;
  outline: none;
  cursor: pointer;
  color: inherit;
  font-size: inherit;
  font-weight: inherit;
}

/* ==========================================================================
   Breadcrumb de Navegação
   ========================================================================== */
.breadcrumb-nav {
  margin-bottom: var(--spacing-6);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.breadcrumb-item a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb-separator {
  user-select: none;
  opacity: 0.5;
}

.breadcrumb-item[aria-current="page"] {
  color: var(--color-text-primary);
  font-weight: 500;
}

/* ==========================================================================
   Rodapé Semântico
   ========================================================================== */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-10);
  padding-bottom: var(--spacing-8);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

.footer-brand p {
  margin-top: var(--spacing-2);
  max-width: 380px;
  line-height: var(--line-height-relaxed);
  font-size: var(--font-size-sm);
}

.footer-section h4 {
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--spacing-6);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
}