/* ===== CSS VARIABLES - DESIGN SYSTEM ===== */

:root {
  
  /* ===== CORES ===== */
  
  /* Cores primárias */
  --color-primary: #074246;
  --color-primary-dark: #053336;
  --color-primary-light: #0a5a5f;
  --color-primary-lighter: #0d7076;
  
  /* Cores secundárias */
  --color-secondary: #1C244B;
  --color-secondary-dark: #151b3a;
  --color-secondary-light: #2a3358;
  
  /* Cores de feedback */
  --color-success: #28a745;
  --color-success-dark: #218838;
  --color-success-light: #d4edda;
  
  --color-warning: #ffc107;
  --color-warning-dark: #e0a800;
  --color-warning-light: #fff3cd;
  
  --color-error: #dc3545;
  --color-error-dark: #c82333;
  --color-error-light: #f8d7da;
  
  --color-info: #17a2b8;
  --color-info-dark: #138496;
  --color-info-light: #d1ecf1;
  
  /* Cores de texto */
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-lighter: #999999;
  --color-text-inverse: #ffffff;
  
  /* Cores de fundo */
  --color-bg: #ffffff;
  --color-bg-light: #f8f9fa;
  --color-bg-dark: #e9ecef;
  --color-bg-darker: #dee2e6;
  
  /* Cores de borda */
  --color-border: #dee2e6;
  --color-border-light: #e9ecef;
  --color-border-dark: #ced4da;
  
  /* ===== TIPOGRAFIA ===== */
  
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-secondary: Georgia, 'Times New Roman', serif;
  --font-monospace: 'Courier New', Courier, monospace;
  
  /* Tamanhos de fonte */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  
  /* Pesos de fonte */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Altura de linha */
  --line-height-tight: 1.25;
  --line-height-base: 1.5;
  --line-height-relaxed: 1.75;
  
  /* ===== ESPAÇAMENTO ===== */
  
  --spacing-0: 0;
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  --spacing-4xl: 6rem;     /* 96px */
  
  /* ===== LAYOUT ===== */
  
  --container-max-width: 1200px;
  --container-padding: var(--spacing-md);
  
  --grid-gap: var(--spacing-md);
  
  /* ===== BORDAS ===== */
  
  --border-width-thin: 1px;
  --border-width-medium: 2px;
  --border-width-thick: 4px;
  
  --border-radius-none: 0;
  --border-radius-sm: 0.25rem;   /* 4px */
  --border-radius-md: 0.5rem;    /* 8px */
  --border-radius-lg: 0.75rem;   /* 12px */
  --border-radius-xl: 1rem;      /* 16px */
  --border-radius-full: 9999px;
  
  /* ===== SOMBRAS ===== */
  
  --shadow-none: none;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* ===== TRANSIÇÕES ===== */
  
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  --easing-linear: linear;
  --easing-in: ease-in;
  --easing-out: ease-out;
  --easing-in-out: ease-in-out;
  
  /* ===== Z-INDEX ===== */
  
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* ===== BREAKPOINTS (para uso em JS) ===== */
  
  --breakpoint-mobile: 768px;
  --breakpoint-tablet: 992px;
  --breakpoint-desktop: 1200px;
}

/* ===== DARK MODE (opcional) ===== */

@media (prefers-color-scheme: dark) {
  :root {
    /* Sobrescrever variáveis para dark mode se necessário */
    /* --color-bg: #1a1a1a; */
    /* --color-text: #f0f0f0; */
  }
}