/* ============================================================
   BASE.CSS — Reset, tipografia e utilitarios de acessibilidade
   ============================================================ */

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

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

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

h1 { font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl)); }
h2 { font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl)); }
h3 { font-size: clamp(var(--text-xl),  3vw, var(--text-3xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p { line-height: var(--leading-relaxed); }

strong { font-weight: var(--font-weight-bold); }
em     { font-style: italic; }

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-fixed);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* Focus visivel para navegacao por teclado */
:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 3px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* --- Selecao de texto ---------------------------------------- */
::selection {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* --- Scrollbar customizada (Chrome/Edge) --------------------- */
::-webkit-scrollbar       { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-surface-alt); }
::-webkit-scrollbar-thumb { background: var(--color-primary-light); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

/* --- Utilitarios de texto ------------------------------------ */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.text-primary  { color: var(--color-primary); }
.text-accent   { color: var(--color-accent); }
.text-muted    { color: var(--color-text-muted); }
.text-inverse  { color: var(--color-text-inverse); }
.text-success  { color: var(--color-success); }

.font-bold      { font-weight: var(--font-weight-bold); }
.font-semibold  { font-weight: var(--font-weight-semibold); }
.font-extrabold { font-weight: var(--font-weight-extrabold); }

/* --- Utilitarios de exibicao --------------------------------- */
.hidden { display: none !important; }
.block  { display: block; }
.flex   { display: flex; }
.grid   { display: grid; }
.inline-flex { display: inline-flex; }

.items-center  { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* --- Responsivo ---------------------------------------------- */
@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
}
@media (min-width: 768px) {
  .hide-desktop { display: none !important; }
}