/* ============================================================
   BASE · reset, tipografia base, classes utilitárias
   ============================================================ */

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.55;
  color: var(--paper);
  background: var(--ink);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Textura sutil de papel sobre tudo */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.35;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/></svg>");
}

/* Container central */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 2;
}

/* Helpers tipográficos */
.display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 0.95;
}
.mono { font-family: var(--font-mono); letter-spacing: 0.02em; }
.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brass);
}

/* Botão padrão (variantes via .btn-primary) */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--paper);
  color: var(--paper);
  background: transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  font-weight: 500;
}
.btn:hover { background: var(--paper); color: var(--ink); }
.btn-primary {
  background: var(--brass);
  border-color: var(--brass);
  color: var(--ink);
}
.btn-primary:hover {
  background: var(--brass-hot);
  border-color: var(--brass-hot);
  color: var(--ink);
}
.btn .arrow { transition: transform 0.25s; }
.btn:hover .arrow { transform: translateX(4px); }
.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.btn:disabled:hover {
  background: var(--brass);
  border-color: var(--brass);
  color: var(--ink);
}

/* Anatomia padrão de cabeçalho de seção */
.section-head {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  margin-bottom: 60px;
  align-items: start;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.section-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brass);
  letter-spacing: 0.1em;
  padding-top: 16px;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1;
  letter-spacing: -0.025em;
}
.section-title em { font-style: italic; color: var(--brass-hot); }
.section-sub {
  font-size: 17px;
  color: rgba(241, 236, 226, 0.7);
  max-width: 680px;
  margin-top: 20px;
  line-height: 1.55;
  font-weight: 300;
}

@media (max-width: 760px) {
  .section-head { grid-template-columns: 1fr; gap: 12px; }
}