/* ============================================================
   BUTTON — Terracotta / Mangue / Sand
============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.875rem;
  white-space: nowrap;
  position: relative;
  transition: transform var(--dur-fast) ease,
              background var(--dur-base) ease,
              box-shadow var(--dur-base) ease,
              border-color var(--dur-base) ease,
              color var(--dur-base) ease;
}

.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--sol-500);
  color: var(--orla-900);
  box-shadow: 0 6px 16px rgba(232, 169, 58, 0.35);
}

.btn--primary:hover {
  background: var(--sol-600);
}

.btn--outline {
  background: transparent;
  color: var(--paper);
  border-color: rgba(251, 246, 236, 0.4);
}

.btn--outline:hover {
  background: rgba(251, 246, 236, 0.12);
}

.btn--secondary {
  background: var(--orla-600);
  color: var(--paper);
  box-shadow: 0 6px 16px rgba(31, 103, 153, 0.28);
}

.btn--secondary:hover {
  background: var(--orla-800);
}

.btn--ghost {
  font-weight: 500;
  color: var(--ink-soft);
  background: none;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 12px 22px;
}

.btn--ghost:hover {
  color: var(--ink);
  border-color: rgba(42, 33, 24, 0.25);
  background: rgba(42, 33, 24, 0.04);
}

.btn--ghost svg { transition: transform var(--dur-base); }
.btn--ghost:hover svg { transform: translateX(4px); }

.btn--sun {
  background: var(--gold);
  color: var(--mangue-900);
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(240, 199, 154, 0.45);
}

.btn--sun:hover {
  background: #F5D4A8;
}

.btn--clay {
  background: var(--terracotta-600);
  color: var(--paper);
  font-weight: 600;
  box-shadow: var(--shadow-clay);
}

.btn--clay:hover {
  background: var(--terracotta-800);
}

.btn--success {
  background: var(--mangue-600);
  color: var(--paper);
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(51, 81, 63, 0.28);
}

.btn--success:hover {
  background: var(--mangue-800);
}

.btn--lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.82rem;
}

.btn--block {
  width: 100%;
}

.btn:disabled,
.btn[disabled] {
  background: var(--sand-300);
  color: var(--sand-600);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ============================================================
   HERO CTA — botão shiny + outline (estilo Vanessence, cores RF)
============================================================ */

@property --rf-grad-angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

@keyframes rf-border-spin {
  to { --rf-grad-angle: 360deg; }
}

@keyframes rf-shimmer {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.btn--shiny {
  --rf-grad-angle: 0deg;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  color: var(--paper);
  background:
    linear-gradient(var(--terracotta-700), var(--terracotta-800)) padding-box,
    conic-gradient(
      from var(--rf-grad-angle),
      transparent 0%,
      var(--terracotta-400) 8%,
      var(--gold) 18%,
      var(--terracotta-500) 32%,
      transparent 42%
    ) border-box;
  box-shadow: 0 8px 24px rgba(110, 45, 26, 0.35);
  animation: rf-border-spin 3s linear infinite;
  transition: transform var(--dur-fast) ease;
}

.btn--shiny::after {
  content: '';
  pointer-events: none;
  position: absolute;
  left: 50%;
  top: 50%;
  width: 120%;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  z-index: 0;
  background: linear-gradient(-50deg, transparent, rgba(240, 199, 154, 0.35), transparent);
  opacity: 0.45;
  animation: rf-shimmer 5s linear infinite;
}

.btn--shiny > * {
  position: relative;
  z-index: 1;
}

.btn--shiny:hover {
  transform: translateY(-2px);
  color: var(--paper);
}

.btn--shiny:active {
  transform: scale(0.98);
}

.btn--outline-hero {
  position: relative;
  overflow: hidden;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  border: 1.5px solid rgba(251, 246, 236, 0.42);
  color: var(--paper);
  background: transparent;
  transition:
    transform var(--dur-fast) ease,
    border-color var(--dur-base) ease,
    background var(--dur-base) ease,
    color var(--dur-base) ease;
}

.btn--outline-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(251, 246, 236, 0);
  transition: background var(--dur-base) ease;
  z-index: 0;
}

.btn--outline-hero > * {
  position: relative;
  z-index: 1;
}

.btn--outline-hero:hover {
  border-color: var(--gold);
  color: var(--paper);
  transform: translateY(-2px);
}

.btn--outline-hero:hover::before {
  background: rgba(251, 246, 236, 0.1);
}

.btn--outline-hero svg {
  transition: transform var(--dur-base) ease;
}

.btn--outline-hero:hover svg {
  transform: translateX(4px);
}

@media (prefers-reduced-motion: reduce) {
  .btn--shiny,
  .btn--shiny::after {
    animation: none;
  }
}