/* ── Custom properties ─────────────────────────────────────── */
:root {
  --navy:       #1B3A8C;
  --blue:       #2979C4;
  --orange:     #E8851A;
  --dark-bg:    #0D1F4E;
  --light-bg:   #F8F9FC;
  --contact-bg: #F0F4FF;
  --text:       #1a1a2e;
  --muted:      #555;
  --border:     #dde4f0;
  --font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --nav-h:      64px;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); color: var(--text); line-height: 1.6; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: var(--font); }

/* ── Shared layout ─────────────────────────────────────────── */
.section-inner,
.nav-inner,
.footer-inner { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

section { padding: 80px 0; }

.section-header { text-align: center; margin-bottom: 48px; }
.section-label {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 10px;
}
.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 14px;
  line-height: 1.25;
}
.section-header p {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 5px;
  font-weight: 600;
  font-size: 1rem;
  transition: opacity 0.15s, transform 0.1s;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); }
.btn-primary { background: var(--orange); color: #fff; }
.btn-outline  { border: 2px solid rgba(255,255,255,0.6); color: rgba(255,255,255,0.9); }
.btn-full     { width: 100%; text-align: center; }

/* ── Navigation ────────────────────────────────────────────── */
#nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy);
  height: var(--nav-h);
  box-shadow: 0 2px 12px rgba(0,0,0,0.25);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo img { height: 38px; }
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: #fff; }
.lang-switcher { display: flex; gap: 4px; }
.lang-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.7);
  padding: 4px 10px;
  border-radius: 3px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: background 0.15s, color 0.15s;
}
.lang-btn:hover,
.lang-btn.active {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
}
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  padding: 4px;
}

/* Mobile nav open state */
#nav.nav--open .nav-links {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--navy);
  padding: 20px 24px;
  gap: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* ── Hero ──────────────────────────────────────────────────── */
#hero {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--navy) 55%, var(--blue) 100%);
  color: #fff;
  padding: 100px 0 90px;
  text-align: center;
}
.hero-inner { max-width: 740px; margin: 0 auto; padding: 0 24px; }
.eyebrow {
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(200,220,255,0.8);
  margin-bottom: 18px;
}
#hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 1.1rem;
  color: rgba(200,220,255,0.85);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}
.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ── Services ──────────────────────────────────────────────── */
#servicos { background: var(--light-bg); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.service-card {
  background: #fff;
  border-radius: 10px;
  padding: 28px 24px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  border-top: 4px solid transparent;
  transition: transform 0.15s, box-shadow 0.15s;
}
.service-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.1); }
.service-card--blue   { border-top-color: var(--blue); }
.service-card--orange { border-top-color: var(--orange); }
.service-card--wide   { grid-column: span 2; }
.service-icon { font-size: 1.8rem; margin-bottom: 12px; display: block; }
.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}
.service-card p {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ── Why RTC ───────────────────────────────────────────────── */
#sobre { background: #fff; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--contact-bg);
  border-radius: 10px;
  padding: 28px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stat-value {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}
.stat-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--blue);
}
.stat-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ── Contact ───────────────────────────────────────────────── */
#contato { background: var(--contact-bg); }
.contact-form {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.form-group { display: flex; flex-direction: column; }
.contact-form input,
.contact-form textarea {
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  transition: border-color 0.15s;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(41,121,196,0.15);
}
.form-feedback {
  font-size: 0.92rem;
  padding: 10px 14px;
  border-radius: 5px;
  display: none;
}
.form-feedback--success {
  display: block;
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}
.form-feedback--error {
  display: block;
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}
.contact-fallback {
  text-align: center;
  margin-top: 18px;
  font-size: 0.9rem;
  color: var(--muted);
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
}
.contact-fallback a { color: var(--blue); text-decoration: underline; }

/* ── Footer ────────────────────────────────────────────────── */
footer {
  background: var(--dark-bg);
  color: rgba(180,210,255,0.75);
  padding: 40px 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: center;
}
.footer-col { display: flex; flex-direction: column; gap: 6px; font-size: 0.88rem; }
.footer-col--center { text-align: center; align-items: center; }
.footer-col--right  { text-align: right;  align-items: flex-end; }
.footer-logo { margin-bottom: 8px; opacity: 0.9; }
footer p { line-height: 1.5; }
footer a { color: var(--blue); }
.footer-col--right p { color: var(--blue); font-weight: 500; }
.lang-switcher--footer { margin-top: 8px; }

/* ── Focus visibility (keyboard nav / accessibility) ──────── */
.btn:focus-visible,
.lang-btn:focus-visible,
.nav-links a:focus-visible,
.nav-hamburger:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

@media (forced-colors: active) {
  .contact-form input:focus,
  .contact-form textarea:focus {
    outline: 2px solid ButtonText;
  }
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  #hero h1      { font-size: 1.9rem; }
  .hero-subtitle { font-size: 1rem; }

  .nav-links    { display: none; }
  .nav-hamburger { display: block; }
  .lang-switcher { display: none; }
  #nav.nav--open .lang-switcher {
    display: flex;
    padding: 0 24px 20px;
  }

  .services-grid { grid-template-columns: 1fr; }
  .service-card--wide { grid-column: span 1; }

  .stats-grid { grid-template-columns: 1fr; }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-col--center,
  .footer-col--right { text-align: center; align-items: center; }
}

@media (max-width: 480px) {
  section { padding: 56px 0; }
  #hero    { padding: 72px 0 64px; }
  .section-header h2 { font-size: 1.6rem; }
  #hero h1 { font-size: 1.6rem; }
}