/* =============================================================
   BASE.CSS — Reset, Custom Properties, Tipografia, Utilitários
   AlugueUse Theme v1.0
   ============================================================= */
/* ── Google Fonts Local (@font-face) — Carregamento Local sem Latência Externa ── */
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-semibold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ── Custom Properties ── */
:root {
  /* Paleta principal */
  --color-primary:        #08244a;
  --color-primary-light:  #16448a;
  --color-primary-dark:   #061933;
  --color-accent:         #ea580c;
  --color-accent-light:   #f97316;
  --color-accent-dark:    #c2410c;

  /* Neutros */
  --color-white:   #ffffff;
  --color-off-white: #f8f9fb;
  --color-gray-100: #f2f4f7;
  --color-gray-200: #e4e7ed;
  --color-gray-300: #cdd1db;
  --color-gray-400: #9aa0b0;
  --color-gray-500: #6b7385;
  --color-gray-600: #4a5168;
  --color-gray-700: #2d3347;
  --color-text:     #1a1f2e;
  --color-text-muted: #6b7385;

  /* Tipografia */
  --font-family:    'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs:   clamp(0.75rem,  0.7rem + 0.25vw, 0.8125rem);
  --font-size-sm:   clamp(0.875rem, 0.8rem + 0.375vw, 0.9375rem);
  --font-size-base: clamp(1rem,     0.95rem + 0.25vw, 1.0625rem);
  --font-size-lg:   clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --font-size-xl:   clamp(1.25rem,  1.1rem + 0.75vw, 1.5rem);
  --font-size-2xl:  clamp(1.5rem,   1.3rem + 1vw, 2rem);
  --font-size-3xl:  clamp(1.875rem, 1.5rem + 1.875vw, 2.75rem);
  --font-size-4xl:  clamp(2.25rem,  1.8rem + 2.25vw, 3.5rem);

  /* Espaçamento */
  --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;
  --space-24:  6rem;

  /* Layout */
  --container-max:    1280px;
  --container-pad:    clamp(1rem, 5vw, 2rem);
  --header-height:    72px;
  --topbar-height:    44px;
  --radius-sm:        4px;
  --radius-md:        8px;
  --radius-lg:        12px;
  --radius-xl:        20px;
  --radius-full:      9999px;

  /* Sombras */
  --shadow-sm:  0 1px 3px rgba(8,36,74,0.08), 0 1px 2px rgba(8,36,74,0.06);
  --shadow-md:  0 4px 12px rgba(8,36,74,0.12), 0 2px 6px rgba(8,36,74,0.08);
  --shadow-lg:  0 10px 30px rgba(8,36,74,0.18), 0 4px 12px rgba(8,36,74,0.10);
  --shadow-xl:  0 20px 50px rgba(8,36,74,0.22), 0 8px 20px rgba(8,36,74,0.14);

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

  /* Z-index */
  --z-topbar:   100;
  --z-header:   200;
  --z-drawer:   300;
  --z-overlay:  250;
  --z-float:    400;
  --z-tooltip:  500;
}

/* ── Reset Ampliado ── */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

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

p { margin-bottom: var(--space-4); }
p:last-child { margin-bottom: 0; }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-accent-dark); }

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

ul, ol { list-style: none; }

button, [type="button"], [type="submit"] {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

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

/* ── Acessibilidade: skip link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 600;
  border-radius: 0 0 var(--radius-md) 0;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ── Foco visível ── */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Screen-reader only ── */
.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;
}

/* ── Utilitários ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-20);
}

.section--sm {
  padding-block: var(--space-12);
}

.section--lg {
  padding-block: var(--space-24);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-inline: auto;
}

.section-header .section-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-weight: 700;
  margin-top: var(--space-4);
  transition: gap var(--transition-fast), color var(--transition-fast);
}
.section-header .section-link:hover { gap: var(--space-3); color: var(--color-accent); }

/* ── Animações ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-ring {
  0%   { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.8); opacity: 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Skeleton loader ── */
.skeleton {
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}