/* =========================================================================
   Strack — site institucional
   Stylesheet único, mobile-first, sem framework.
   Tokens em :root. Breakpoints: 640 / 960 / 1280.
   PLACEHOLDER: cores devem ser alinhadas com src/theme/ do strack-app.
   ========================================================================= */

:root {
  /* Cores — espelham strack-app src/theme/colors.ts (light) */
  --color-bg: #f5f5f5;            /* light.background */
  --color-surface: #ffffff;       /* light.surface — cards, header, inputs */
  --color-surface-alt: #f0f0f0;   /* light.surfaceAlt — alt sections, footer, info blocks */
  --color-text: #1a1a1a;          /* light.text */
  --color-text-secondary: #555;   /* light.textSecondary */
  --color-muted: #777;            /* light.textMuted */
  --color-border: #e0e0e0;        /* light.border */
  --color-border-light: #ddd;     /* light.borderLight */
  --color-primary: #4caf50;       /* light.accent — brand */
  --color-primary-hover: #43a047;
  --color-primary-contrast: #ffffff; /* light.textInverse */
  --color-accent: #4caf50;
  --color-danger: #e53935;        /* light.live */

  /* Tipografia */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --fs-base: 16px;
  --lh-base: 1.55;

  /* Raio, sombra, espaço */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  --space-10: 64px;

  /* Layout */
  --container: 1120px;
  --container-narrow: 760px;
  --header-h: 64px;
}

/* Reset mínimo */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: 4px; }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 var(--space-4); }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); margin-top: var(--space-8); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 var(--space-4); }
ul, ol { padding-left: 1.2rem; }

.skip-link {
  position: absolute; top: -40px; left: 8px;
  background: var(--color-primary); color: #fff;
  padding: 8px 12px; border-radius: var(--radius-sm); z-index: 100;
}
.skip-link:focus { top: 8px; }

/* Layout */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--space-4); }
.container.narrow { max-width: var(--container-narrow); }
.center { text-align: center; }
.center .prose { margin-left: auto; margin-right: auto; }
.muted { color: var(--color-muted); }
.prose { max-width: 65ch; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
}
.brand {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-weight: 700; color: var(--color-text); text-decoration: none;
}
.brand img { border-radius: 7px; }
.brand:hover { text-decoration: none; }

.primary-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--space-5); align-items: center; }
.primary-nav a { color: var(--color-text); font-weight: 500; }
.primary-nav a[aria-current="page"] { color: var(--color-primary); }
.nav-cta { color: var(--color-primary-contrast); }
.nav-cta:hover { text-decoration: none; }

.nav-toggle {
  display: none;
  background: transparent; border: 0; cursor: pointer;
  width: 40px; height: 40px; padding: 8px;
}
.nav-toggle span {
  display: block; height: 2px; background: var(--color-text);
  margin: 4px 0; border-radius: 1px;
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .primary-nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: var(--color-bg); border-bottom: 1px solid var(--color-border);
    display: none;
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: var(--space-3) var(--space-4); }
  .primary-nav li { border-bottom: 1px solid var(--color-border); }
  .primary-nav li:last-child { border-bottom: 0; }
  .primary-nav a { display: block; padding: var(--space-3) 0; }
  .nav-cta { margin-top: var(--space-2); text-align: center; }
}

/* Botões */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 80ms ease, background 120ms ease, border-color 120ms ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-icon { flex-shrink: 0; }
.btn-primary { background: var(--color-primary); color: var(--color-primary-contrast); }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.btn-large { padding: 14px 22px; font-size: 1.05rem; }

/* Hero */
.hero { padding: var(--space-10) 0; }
.hero-inner {
  display: grid; grid-template-columns: 1fr; gap: var(--space-6);
  align-items: center;
}
.hero-copy h1 { margin-top: 0; }
.lede { font-size: 1.15rem; color: var(--color-muted); max-width: 52ch; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: var(--space-5) 0 var(--space-3); }
.hero-ctas.center { justify-content: center; }
.hint { font-size: 0.9rem; color: var(--color-muted); }
.hero-art img {
  margin: 0 auto;
  max-width: 280px;
  width: 100%;
  border-radius: 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18), 0 8px 20px rgba(0, 0, 0, 0.10);
}

@media (min-width: 960px) {
  .hero-inner { grid-template-columns: 1.1fr 1fr; }
  .hero { padding: var(--space-10) 0 calc(var(--space-10) + var(--space-5)); }
}

/* Seções */
.section { padding: var(--space-10) 0; }
.section-alt { background: var(--color-surface-alt); }

/* Cards / features */
.card-grid, .feature-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .card-grid, .feature-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) {
  .card-grid { grid-template-columns: repeat(4, 1fr); }
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
}
.card, .feature {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
}
.feature img { margin-bottom: var(--space-3); }
.card h3, .feature h3 { margin: 0 0 var(--space-2); }
.card p, .feature p { margin: 0; color: var(--color-muted); }

/* Carrossel */
.carousel {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-3);
}
.carousel-track {
  list-style: none; margin: 0; padding: 0;
  display: flex; gap: var(--space-4);
  overflow-x: auto; scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}
.carousel-track::-webkit-scrollbar { display: none; }
.carousel-slide { flex: 0 0 auto; scroll-snap-align: center; }
.carousel-slide img {
  width: 220px; max-width: 60vw;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  background: var(--color-surface);
}
.carousel-btn {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--color-border); background: var(--color-surface);
  font-size: 1.4rem; line-height: 1; cursor: pointer;
}
.carousel-btn:hover { background: var(--color-surface-alt); }
.carousel-dots {
  grid-column: 1 / -1; display: flex; justify-content: center; gap: 6px; margin-top: var(--space-3);
}
.carousel-dots button {
  width: 8px; height: 8px; border-radius: 50%; border: 0;
  background: var(--color-border); cursor: pointer;
}
.carousel-dots button[aria-current="true"] { background: var(--color-primary); }

/* TOC */
.toc {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-5) 0 var(--space-8);
}
.toc h2 { margin: 0 0 var(--space-2); font-size: 1rem; }
.toc ol { margin: 0; padding-left: 1.2rem; }
.toc li { margin-bottom: 4px; }

.callout {
  background: #edf7ee;
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-sm);
  margin: var(--space-4) 0;
}
.callout p:last-child { margin-bottom: 0; }

/* Contato */
.contact-info {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  margin-top: var(--space-5);
}
.contact-info p { margin: 0 0 var(--space-2); }

/* Footer */
.site-footer {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0 var(--space-5);
  margin-top: var(--space-10);
}
.footer-inner {
  display: flex; flex-wrap: wrap; justify-content: space-between;
  align-items: flex-start; gap: var(--space-5);
}
.footer-right { display: flex; flex-direction: column; align-items: flex-end; gap: var(--space-3); text-align: right; }
.footer-inner nav ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: flex-end; }
.footer-inner nav a { color: var(--color-text); }
@media (max-width: 560px) {
  .footer-right { align-items: flex-start; text-align: left; }
  .footer-inner nav ul { justify-content: flex-start; }
}