/* ==========================================================================
   base.css — Reset, fundamentos, animações globais e utilidades
   ========================================================================== */

/* Reset conservador: o layout original foi validado sem o reset universal
   de box-sizing (content-box padrão). Mantemos apenas onde o original usava. */

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--gold);
}

a:hover {
  color: var(--gold-light);
}

::selection {
  background: rgba(200, 164, 78, 0.25);
  color: var(--ink);
}

button {
  font-family: inherit;
}

/* ── Animações globais ──────────────────────────────────────────────── */

@keyframes duoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes duoPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes ctaPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(26, 26, 26, 0.35); }
  50% { transform: scale(1.05); box-shadow: 0 0 0 14px rgba(26, 26, 26, 0); }
}

@keyframes marqueeRight {
  from { transform: translateX(-50%); }
  to { transform: translateX(0); }
}

@keyframes rocketShake {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-4deg); }
  75% { transform: rotate(4deg); }
}

@keyframes metricRise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes metalShine {
  0%, 10% { left: -40%; opacity: 0; }
  14% { opacity: 1; }
  30% { left: 130%; opacity: 1; }
  36%, 100% { left: 130%; opacity: 0; }
}

@keyframes flameFlicker {
  0%, 100% { opacity: 0.6; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* ── Utilidades de layout ───────────────────────────────────────────── */

.page-shell {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
}

.container--narrow { max-width: 1000px; }
.container--800 { max-width: 800px; }
.container--640 { max-width: 640px; }
.container--560 { max-width: 560px; }

.section {
  position: relative;
  background: var(--paper);
  padding: var(--section-pad) var(--gutter);
}

.section--light { background: var(--white); }
.section--dark { background: var(--ink); }

.divider-gold {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--gold-soft), transparent);
}

/* ── Reveal on scroll (IntersectionObserver) ────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--reveal-dur), transform var(--reveal-dur);
}

.reveal--on {
  opacity: 1;
  transform: none;
}