/* =========================================================
 * Base — reset, tipografia, layout, utilidades e movimento
 * ========================================================= */

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

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

body {
  min-height: 100vh;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  padding-bottom: calc(96px + env(safe-area-inset-bottom));
  transition: background-color var(--dur) var(--ease-out), color var(--dur) var(--ease-out);
}

@media (min-width: 900px) {
  body { padding-bottom: 64px; }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  letter-spacing: -0.025em;
  line-height: 1.12;
  font-weight: 700;
}

p { text-wrap: pretty; }

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

button {
  cursor: pointer;
  background: none;
  border: 0;
  -webkit-tap-highlight-color: transparent;
}

button:disabled { cursor: not-allowed; }

a { color: inherit; text-decoration: none; }

img, svg { display: block; }

[hidden] { display: none !important; }

::selection { background: var(--lime); color: var(--lime-ink); }

:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: var(--r-xs);
}

/* Scrollbar discreta */
* { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 99px; border: 3px solid transparent; background-clip: padding-box; }

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

main { padding-top: calc(var(--topbar-h) + 12px); }

.tab-content { display: none; }
.tab-content.active {
  display: block;
  animation: tab-in var(--dur-slow) var(--ease-out) both;
}

@keyframes tab-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.section { margin-top: 56px; }
@media (min-width: 900px) { .section { margin-top: 80px; } }

/* ---------- Ícones ---------- */
.ico {
  display: inline-flex;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
}
.ico svg { width: 100%; height: 100%; }

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

.muted { color: var(--ink-3); }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 999;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  background: var(--forest);
  color: #fff;
  font-weight: 600;
  transition: top var(--dur) var(--ease-out);
}
.skip-link:focus { top: 12px; }

@media (max-width: 640px) {
  .hide-sm { display: none !important; }
}

/* ---------- Reveal on scroll ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- Pulso "ao vivo" ---------- */
.pulse-dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}
.pulse-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: inherit;
  animation: pulse 2s var(--ease-out) infinite;
}
.pulse-dot.lime { background: var(--lime); }

@keyframes pulse {
  0%   { transform: scale(1); opacity: 0.7; }
  80%, 100% { transform: scale(2.8); opacity: 0; }
}

/* ---------- Skeleton ---------- */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--surface-sunken);
  border-radius: var(--r-xs);
}
.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  animation: shimmer 1.4s infinite;
}
:root[data-theme='dark'] .skeleton::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.06), transparent);
}
@keyframes shimmer { to { transform: translateX(100%); } }

/* ---------- Movimento reduzido ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ---------- v2.x — PWA mobile-first: chat sem rolagem extra ---------- */
@media (max-width: 899px) {
  body[data-tab="chat"] { padding-bottom: calc(var(--bottom-nav-space) + env(safe-area-inset-bottom)); }
}