.btn-solid {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  background: transparent;
  color: var(--gold);
  border: 1.5px solid var(--gold);
  padding: 16px 36px;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.5px;
}

.btn-solid::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: -1;
}

.btn-solid:hover::before {
  transform: scaleX(1);
}

.btn-solid:hover {
  color: var(--bg);
  border-color: var(--gold);
  box-shadow: 0 0 20px rgba(218, 165, 32, 0.15);
}

.btn-line {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--text-dim);
  background: none;
  border: none;
  cursor: pointer;
  padding: 16px 8px;
  position: relative;
  transition: color 0.25s;
  text-decoration: none;
}

.btn-line .arrow {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-line:hover .arrow { transform: translate(3px, -3px); }

.btn-line::after {
  content: '';
  position: absolute;
  bottom: 12px;
  left: 8px;
  right: 8px;
  height: 1px;
  background: var(--text-faint);
  transition: background 0.25s;
}

.btn-line:hover { color: var(--text); }
.btn-line:hover::after { background: var(--text-dim); }

.btn-line--gold { color: var(--gold); }
.btn-line--gold::after { background: var(--gold-dim); }
.btn-line--gold:hover { color: var(--gold-dim); }