/* ============================================
   Portfólio — Jesiel Pfeifer
   CSS puro, sem JS, sem dependências externas
   Design system próprio (dark, clean, acessível)
   ============================================ */

:root {
  --bg: #0a0f1e;
  --bg-soft: #101828;
  --bg-card: #111a2e;
  --border: #1e2a44;
  --text: #e6edf7;
  --text-muted: #9aa7bd;
  --primary: #34d399;
  --primary-strong: #10b981;
  --accent: #60a5fa;
  --radius: 14px;
  --max-w: 1040px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 15, 30, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text);
}
.brand-dot { color: var(--primary); }

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.nav-links a { color: var(--text-muted); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

.btn-nav {
  background: var(--primary);
  color: #06281c !important;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 700;
}
.btn-nav:hover { background: var(--primary-strong); }

/* ===== Botões ===== */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary { background: var(--primary); color: #06281c; }
.btn-primary:hover { background: var(--primary-strong); }

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}
.btn-ghost:hover { background: var(--bg-soft); }

/* ===== Hero ===== */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 84px 20px 56px;
  text-align: center;
}

.hero-eyebrow {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 18px;
}

.hero-subtitle {
  font-size: clamp(17px, 2.4vw, 21px);
  color: var(--text);
  max-width: 720px;
  margin: 0 auto 14px;
}

.hero-summary {
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 30px;
  font-size: 16px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  max-width: 720px;
  margin: 0 auto;
}

.hero-stats div {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px;
}

.hero-stats dt { font-size: 13px; color: var(--text-muted); order: 2; }
.hero-stats dd { font-size: 26px; font-weight: 800; color: var(--primary); }

/* ===== Seções ===== */
.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 64px 20px;
  border-top: 1px solid var(--border);
}

.section h2 {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
}

.section-intro { color: var(--text-muted); margin-bottom: 28px; }

.prose p { margin-bottom: 16px; color: var(--text); max-width: 780px; }
.prose strong { color: var(--text); }

/* ===== Stack ===== */
.stack-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.stack-grid li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stack-icon { font-size: 22px; margin-bottom: 6px; }
.stack-grid strong { font-size: 16px; }
.stack-grid small { color: var(--text-muted); font-size: 14px; line-height: 1.5; }

/* ===== Projetos ===== */
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 18px;
}

.project-card.featured { border-color: rgba(52, 211, 153, 0.4); }

.project-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.project-head h3 { font-size: 19px; font-weight: 700; }

.tag {
  background: rgba(52, 211, 153, 0.12);
  color: var(--primary);
  border: 1px solid rgba(52, 211, 153, 0.3);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.project-card p { color: var(--text-muted); font-size: 15.5px; margin-bottom: 12px; }
.project-card strong { color: var(--text); }

.project-points {
  margin: 0 0 14px;
  padding-left: 0;
  list-style: none;
  color: var(--text-muted);
  font-size: 15px;
}
.project-points li {
  position: relative;
  padding-left: 1.55em;
  margin-bottom: 8px;
  line-height: 1.55;
}
.project-points li::before {
  content: "▸";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  line-height: inherit;
}

.project-links { margin-bottom: 0 !important; }
.project-links a { font-weight: 600; }

/* ===== FAQ (AEO) ===== */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 12px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16.5px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--primary);
  font-weight: 400;
}

.faq-item[open] summary::after { content: "−"; }

.faq-item p {
  color: var(--text-muted);
  margin-top: 12px;
  font-size: 15.5px;
}

/* ===== Contato ===== */
#contato p { color: var(--text-muted); margin-bottom: 24px; }

.contact-links { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.footer-links {
  list-style: none;
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.footer-links a { color: var(--text-muted); font-size: 13.5px; }
.footer-links a:hover { color: var(--text); }

/* ===== Acessibilidade / Mobile ===== */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav { padding: 12px 16px; }
  .nav-links { gap: 14px; }
  .nav-links a { font-size: 14px; }
  .hero { padding: 56px 16px 40px; }
  .section { padding: 48px 16px; }
  .project-card { padding: 20px 16px; }
  .hero-actions .btn { width: 100%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}

/* Foco visível (acessibilidade sem JS) */
a:focus-visible, summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}


/* ===== Tech (chips de tecnologias) ===== */
.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}
.project-tech .tag {
  background: rgba(96, 165, 250, 0.12);
  border-color: rgba(96, 165, 250, 0.25);
  color: var(--accent);
}

/* ===== Onde gerei valor (impacto) ===== */
.impact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: 16px;
  margin-top: 8px;
}
.impact-grid .project-card { margin-bottom: 0; }
.impact-grid h3 { margin: 0 0 10px; font-size: 17px; }