/* ============================================================
   base.css — Variáveis CSS + Reset
   Museu Municipal — Sistema de Gestão
   ============================================================ */

/* ── Variáveis de design ───────────────────────────────────── */
:root {
  /* Paleta institucional */
  --color-primary:      #1a3a4a;   /* Azul-petróleo escuro */
  --color-primary-light:#234f65;
  --color-primary-dark: #0f2535;
  --color-accent:       #c8922a;   /* Dourado/âmbar cultural */
  --color-accent-light: #e0a93d;
  --color-accent-dark:  #a87520;

  /* Neutros */
  --color-white:    #ffffff;
  --color-gray-50:  #f8f9fa;
  --color-gray-100: #f0f2f5;
  --color-gray-200: #e9ecef;
  --color-gray-300: #dee2e6;
  --color-gray-400: #ced4da;
  --color-gray-500: #adb5bd;
  --color-gray-600: #6c757d;
  --color-gray-700: #495057;
  --color-gray-800: #343a40;
  --color-gray-900: #212529;

  /* Semânticos */
  --color-success:  #198754;
  --color-warning:  #ffc107;
  --color-danger:   #dc3545;
  --color-info:     #0dcaf0;

  /* Tipografia */
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Merriweather', 'Georgia', 'Times New Roman', serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  --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-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semi:   600;
  --font-weight-bold:   700;

  --line-height-tight:  1.25;
  --line-height-normal: 1.5;
  --line-height-loose:  1.75;

  /* Espaçamentos */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Bordas */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08);
  --shadow-md:  0 4px 12px rgba(0,0,0,.10);
  --shadow-lg:  0 8px 24px rgba(0,0,0,.12);
  --shadow-xl:  0 16px 40px rgba(0,0,0,.15);

  /* Transições */
  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow:   400ms ease;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky:   1020;
  --z-overlay:  1040;
  --z-modal:    1050;
  --z-toast:    1060;
  --z-tooltip:  1080;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: var(--color-gray-100);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-light); }
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

ul, ol { list-style: none; }

table { border-collapse: collapse; }

button { cursor: pointer; }

h1, h2, h3, h4, h5, h6 {
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-bold);
}

/* ── Utilitários comuns ─────────────────────────────────────── */
.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;
}

.text-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}