/* Reset básico */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background-color: #fdfbfb;
  color: #222;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  text-align: center;
}

header {
  background: linear-gradient(90deg, #ffdee9 0%, #b5fffc 100%);
  padding: 3.5rem 1rem;
  border-bottom: 1px solid #eee;
}
header h1 {
  font-size: clamp(2.25rem, 3.5vw, 3.25rem);
  margin: 0 0 .5rem;
  color: #111;
}
header p {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: #333;
  margin: 0;
}

.intro h2, .features h2, .plans h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
  margin: 0 0 1rem;
  color: #111;
}
.intro p {
  font-size: 1.05rem;
  color: #444;
  margin: 0 auto;
  max-width: 760px;
}

.cta {
  display: inline-block;
  margin-top: 1.5rem;
  background-color: #111;
  color: #fff;
  padding: 0.9rem 2rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform .12s ease, box-shadow .12s ease, background .2s ease;
}
.cta:hover {
  background-color: #222;
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0,0,0,.06);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 2rem auto;
  max-width: 800px;
}
.feature-list li {
  background-color: #f5f5f5;
  margin: .5rem 0;
  padding: 1rem 1.25rem;
  border-radius: 12px;
  font-size: 1rem;
}

/* Planos */
.plans { padding-top: .5rem; }
.plan-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  align-items: stretch;
}
@media (max-width: 980px) {
  .plan-cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .plan-cards { grid-template-columns: 1fr; }
}

.plan {
  background: #fff;
  border: 1px solid #ececec;
  border-radius: 16px;
  padding: 2rem 1.5rem;
  width: 100%;
  box-shadow: 0 10px 18px rgba(0,0,0,.03);
  transition: transform .15s ease, box-shadow .15s ease;
}
.plan:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(0,0,0,.06);
}
.plan.destaque {
  border: 2px solid #111;
  background: #fafafa;
}
.plan h3 {
  font-size: 1.35rem;
  margin: 0 0 .5rem;
}
.plan .price {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 1rem;
}

footer {
  background-color: #f7f7f7;
  color: #666;
  font-size: 0.95rem;
  padding: 2rem 0;
  border-top: 1px solid #eee;
}

/* Preferências de cor do sistema (dark mode leve) */
@media (prefers-color-scheme: dark) {
  body { background: #0f1115; color: #e5e7eb; }
  header { border-color: #222; }
  .feature-list li { background: #1a1f2a; }
  .plan { background: #12151c; border-color: #1f2430; }
  .plan.destaque { background: #151a22; border-color: #e5e7eb; }
  footer { background: #0f1115; color: #9aa4b2; border-top-color: #1f2430; }
  .cta { background: #e5e7eb; color: #0f1115; }
  .cta:hover { background: #fff; }
}