/* ============================================
   Base Styles — Tipografia, Layout, Utilitarios
   ============================================ */

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  color: var(--color-neutral-700);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* === Container === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* === Tipografia === */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-neutral-900);
}

h1 {
  font-size: var(--text-4xl);
  font-weight: var(--font-extrabold);
  letter-spacing: -0.025em;
}

h2 {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  letter-spacing: -0.02em;
}

h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

p {
  line-height: var(--leading-normal);
}

/* === Secoes === */
.section {
  padding-block: var(--space-20);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.section-header .subtitle {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary-500);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--color-neutral-500);
}

/* === Botoes === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-primary-500);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: var(--color-primary-400);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-primary-800);
  box-shadow: var(--shadow-lg);
}

.btn-white:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary-500);
  border: 2px solid var(--color-primary-500);
}

.btn-outline:hover {
  background: var(--color-primary-500);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-lg {
  font-size: var(--text-lg);
  padding: 1rem 2.5rem;
}

/* === Scroll Reveal Animation === */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 400ms; }

.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* === Screen Reader Only === */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (min-width: 1024px) {
  h1 { font-size: var(--text-5xl); }
  h2 { font-size: var(--text-4xl); }
}