/* =============================================
   BASE — Tipografia, botões, formulários, utilidades
   ============================================= */

/* ── Document ── */
html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 300;
  color: var(--black);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Container ── */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ── Links ── */
a {
  text-decoration: none;
  color: inherit;
  transition: color var(--duration) var(--ease-out);
}

/* ── Typography ── */
.serif {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  color: var(--gold);
}

strong {
  font-weight: 600;
}

/* ── Headings ── */
.section-heading {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--black);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.section-heading .serif {
  font-weight: 800;
}

/* ── Section ── */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 80px;
}

.section-header--left {
  text-align: left;
  margin: 0 0 48px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--gray-500);
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto;
}

.section-header--left p {
  margin: 0;
}

/* ── Tags ── */
.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  background: var(--blue-dim);
  color: var(--blue);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.tag--light {
  background: rgba(192, 155, 78, 0.12);
  color: var(--gold-light);
}

/* Dark sections */
.section-header--light {
  color: var(--white);
}

.section-header--light .tag {
  background: rgba(192, 155, 78, 0.15);
  color: var(--gold-light);
}

.section-header--light .section-heading {
  color: var(--white);
}

.section-header--light p {
  color: rgba(255, 255, 255, 0.5);
}

/* ── Buttons: Primary ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  border: 1px solid rgba(74, 144, 217, 0.15);
  cursor: pointer;
  background: var(--btn-gradient);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  border-radius: var(--radius-full);
  transition: all var(--duration) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, transparent 50%);
  pointer-events: none;
  border-radius: inherit;
}

.btn:hover {
  background: var(--btn-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(30, 75, 122, 0.25), 0 0 0 1px rgba(197, 155, 78, 0.15);
}

.btn:active {
  transform: translateY(0);
}

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

/* ── Buttons: Ghost ── */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-500);
  letter-spacing: 0.2px;
  border-bottom: 1.5px solid transparent;
  transition: all var(--duration) var(--ease-out);
}

.btn-ghost:hover {
  color: var(--black);
  border-color: var(--gray-200);
}

/* ── Buttons: Header CTA ── */
.btn-header {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 24px;
  min-height: 44px;
  min-width: 44px;
  background: var(--btn-gradient);
  border: 1px solid rgba(74, 144, 217, 0.15);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  border-radius: var(--radius-full);
  transition: all var(--duration) var(--ease-out);
}

.btn-header:hover {
  background: var(--btn-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(30, 75, 122, 0.25);
}

/* ── Forms ── */
.form input,
.form select {
  width: 100%;
  padding: 16px 0;
  border: none;
  border-bottom: 2px solid var(--border);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  color: var(--black);
  background: transparent;
  transition: border-color var(--duration) var(--ease-out);
  outline: none;
  border-radius: 0;
}

.form select {
  cursor: pointer;
  color: var(--gray-500);
  appearance: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2371717a' fill='none' stroke-width='1.5'/%3E%3C/svg%3E") no-repeat right center;
  padding-right: 24px;
}

.form select option:not([disabled]) {
  color: var(--black);
}

.form input::placeholder {
  color: var(--gray-400);
}

.form input:focus,
.form select:focus {
  border-color: var(--blue);
}

.form button {
  margin-top: 28px;
}

.form__group {
  margin-bottom: 16px;
  position: relative;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form__label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--gray-500);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.form__note {
  font-size: 0.78rem;
  color: var(--gray-400);
  margin-top: 16px;
  text-align: center;
}

.form input:invalid:not(:placeholder-shown),
.form select:invalid:not(:placeholder-shown) {
  border-color: #e74c4c;
}

.form input:valid:not(:placeholder-shown) {
  border-color: #25D366;
}

/* ── Accessibility ── */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  background: var(--blue);
  color: var(--white);
  padding: 12px 20px;
  border-radius: 0 0 var(--radius) var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

:focus-visible {
  outline: 2.5px solid var(--blue);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}