/* =========================================================
   Portfolio — Elder Sergio Xavier
   Dark theme · Inspired by modern dev portfolios
   ========================================================= */

:root {
  /* Palette */
  --bg: #07070b;
  --bg-2: #0b0b12;
  --surface: #11111a;
  --surface-2: #161623;
  --border: #1f1f2e;
  --border-strong: #2a2a3d;

  --text: #e7e7f0;
  --text-dim: #a1a1b3;
  --text-muted: #6b6b80;

  --violet: #8b5cf6;
  --violet-2: #a78bfa;
  --cyan: #22d3ee;
  --cyan-2: #67e8f9;
  --pink: #f472b6;

  --grad-primary: linear-gradient(135deg, var(--violet) 0%, var(--cyan) 100%);
  --grad-alt:     linear-gradient(135deg, var(--cyan) 0%, var(--pink) 100%);

  --radius: 14px;
  --radius-lg: 22px;
  --shadow-soft: 0 10px 40px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.25);

  --container: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

/* ---------- Background decorations ---------- */
.bg-grid {
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  pointer-events: none;
  z-index: -2;
}

.bg-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  pointer-events: none;
  z-index: -1;
}
.bg-glow--violet { background: var(--violet); top: -150px; left: -150px; }
.bg-glow--cyan   { background: var(--cyan);   bottom: -200px; right: -150px; opacity: 0.25; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  padding: 16px 32px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(7,7,11,0.6);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 18px; letter-spacing: -0.01em;
}
.logo__mark {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 14px;
  color: var(--violet-2);
  background: rgba(139,92,246,0.12);
  border: 1px solid rgba(139,92,246,0.35);
  padding: 4px 8px;
  border-radius: 8px;
}
.logo__name .accent { color: var(--cyan); }

.nav { display: flex; gap: 28px; }
.nav a {
  font-size: 14px; font-weight: 500; color: var(--text-dim);
  position: relative; padding: 6px 0;
  transition: color .2s ease;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--grad-primary);
  transition: width .25s ease;
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  background: transparent; border: 1px solid var(--border-strong);
  border-radius: 10px; padding: 8px 10px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; background: var(--text);
  margin: 4px 0; transition: transform .25s ease, opacity .25s ease;
}

/* ---------- Layout helpers ---------- */
main { display: block; }

.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 96px 32px;
}

.section__head {
  display: flex; align-items: baseline; gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
}
.section__num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px; color: var(--violet-2);
  font-weight: 600;
}
.section__head h2 {
  margin: 0; font-size: clamp(24px, 3vw, 34px); font-weight: 700; letter-spacing: -0.02em;
}
.section__sub {
  flex-basis: 100%;
  margin: 8px 0 0;
  color: var(--text-dim);
  font-size: 15px;
  max-width: 720px;
}

/* ---------- Hero ---------- */
.hero {
  max-width: var(--container);
  margin: 0 auto;
  padding: 96px 32px 64px;
  min-height: calc(100vh - 80px);
  display: flex; align-items: center;
}
.hero__inner { width: 100%; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; color: var(--text-dim);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-strong);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 10px #22c55e;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.9); }
}

.hero h1 {
  font-size: clamp(34px, 5.5vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0 0 24px;
  max-width: 900px;
}
.grad {
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.grad--alt { background: var(--grad-alt); -webkit-background-clip: text; background-clip: text; color: transparent; }

.hero__sub {
  font-size: clamp(15px, 1.4vw, 18px);
  color: var(--text-dim);
  max-width: 720px;
  margin: 0 0 36px;
}
.hero__sub strong { color: var(--text); font-weight: 600; }

.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 24px;
  border-radius: 12px;
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .25s ease, background .25s ease, color .2s ease, border-color .2s ease;
}
.btn--primary {
  background: var(--grad-primary); color: #0a0a14;
  box-shadow: 0 8px 30px rgba(139,92,246,0.35);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(139,92,246,0.45); }
.btn--ghost {
  background: transparent; color: var(--text);
  border-color: var(--border-strong);
}
.btn--ghost:hover { border-color: var(--violet-2); color: var(--violet-2); }

.hero__stats {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 16px;
  max-width: 760px;
}
.hero__stats li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 18px;
  transition: border-color .2s ease, transform .2s ease;
}
.hero__stats li:hover { border-color: var(--violet-2); transform: translateY(-3px); }
.hero__stats strong {
  display: block; font-size: 28px; font-weight: 800;
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: -0.02em;
}
.hero__stats span { font-size: 13px; color: var(--text-dim); }

/* ---------- About ---------- */
.about {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
}
.about__text p { color: var(--text-dim); margin: 0 0 18px; }
.about__text strong { color: var(--text); }
.about__text em { color: var(--cyan-2); font-style: normal; font-weight: 500; }

.about__card {
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-soft);
}
.about__card h3 {
  margin: 0 0 18px; font-size: 16px; font-weight: 600;
  display: flex; align-items: center; gap: 10px;
}
.about__card h3::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--violet-2); box-shadow: 0 0 10px var(--violet-2);
}
.about__card ul { list-style: none; padding: 0; margin: 0; }
.about__card li {
  display: flex; flex-direction: column;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.about__card li:last-child { border-bottom: 0; }
.about__card li span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2px;
}

/* ---------- Timeline ---------- */
.timeline {
  list-style: none; padding: 0; margin: 0;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 11px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--violet), var(--cyan), transparent);
  opacity: 0.5;
}
.timeline__item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 28px;
}
.timeline__dot {
  position: absolute;
  left: 4px; top: 22px;
  width: 16px; height: 16px;
  background: var(--bg);
  border: 2px solid var(--violet-2);
  border-radius: 50%;
  z-index: 1;
}
.timeline__item--current .timeline__dot {
  background: var(--violet-2);
  box-shadow: 0 0 0 4px rgba(139,92,246,0.18), 0 0 18px var(--violet-2);
  animation: dotPulse 2.4s ease-in-out infinite;
}
@keyframes dotPulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(139,92,246,0.18), 0 0 18px var(--violet-2); }
  50%      { box-shadow: 0 0 0 8px rgba(139,92,246,0.08), 0 0 26px var(--violet-2); }
}

.timeline__card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.timeline__card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.35), 0 0 0 1px rgba(139,92,246,0.15);
}
.timeline__card header { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
.timeline__card h3 { margin: 0; font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.timeline__card .company {
  color: var(--violet-2); font-size: 14px; font-weight: 500;
}
.timeline__card .period {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; color: var(--text-muted);
}
.timeline__card p, .timeline__card ul { color: var(--text-dim); font-size: 14.5px; margin: 8px 0 0; }
.timeline__card ul { padding-left: 18px; }
.timeline__card ul li { margin-bottom: 4px; }
.timeline__card strong { color: var(--text); }
.timeline__card em { color: var(--cyan-2); font-style: normal; font-weight: 500; }

.tags {
  list-style: none !important;
  padding: 0 !important;
  margin-top: 14px !important;
  display: flex; flex-wrap: wrap; gap: 6px;
}
.tags li {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--cyan-2);
  background: rgba(34,211,238,0.07);
  border: 1px solid rgba(34,211,238,0.25);
  padding: 4px 10px;
  border-radius: 999px;
  margin: 0 !important;
}

/* ---------- Skills ---------- */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.skill-card {
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .25s ease, transform .25s ease;
}
.skill-card:hover { border-color: var(--violet-2); transform: translateY(-3px); }
.skill-card h3 {
  margin: 0 0 16px; font-size: 16px; font-weight: 600;
  display: flex; align-items: center; gap: 10px;
}
.skill-card h3::before {
  content: ""; width: 8px; height: 8px;
  background: var(--grad-primary); border-radius: 2px;
}
.chips {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: 8px;
}
.chips li {
  font-size: 13px;
  color: var(--text);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-strong);
  padding: 6px 12px;
  border-radius: 8px;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.chips li:hover {
  background: rgba(139,92,246,0.12);
  border-color: var(--violet-2);
  color: var(--violet-2);
}

/* ---------- Contact ---------- */
.section--contact { padding-bottom: 64px; }
.contact {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 32px;
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}
.contact p { color: var(--text-dim); font-size: 17px; margin: 0 0 28px; }
.contact strong { color: var(--text); }
.contact__links { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 32px 16px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}

/* ---------- Selection ---------- */
::selection { background: var(--violet); color: #0a0a14; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--violet); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .site-header { padding: 14px 20px; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: rgba(11,11,18,0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--border); }
  .nav a:last-child { border-bottom: 0; }
  .nav-toggle { display: inline-flex; flex-direction: column; }

  .section, .hero { padding-left: 20px; padding-right: 20px; }
  .section { padding-top: 64px; padding-bottom: 64px; }
  .hero { padding-top: 60px; min-height: auto; }

  .about { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .hero__cta .btn { flex: 1; }
  .timeline__card { padding: 18px; }
  .xp-stats { grid-template-columns: 1fr 1fr; }
  .xp-filters { gap: 6px; }
  .xp-chip { padding: 6px 12px; font-size: 11px; }
}

/* =========================================================
   Experiência profissional — v2
   ========================================================= */

/* KPI strip */
.xp-stats {
  list-style: none; padding: 0; margin: 0 0 36px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.xp-stats__item {
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex; flex-direction: column; gap: 4px;
  transition: border-color .25s ease, transform .25s ease;
}
.xp-stats__item:hover { border-color: var(--violet-2); transform: translateY(-2px); }
.xp-stats__value {
  font-size: 30px; font-weight: 800; letter-spacing: -0.02em;
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1.1;
}
.xp-stats__value small { font-size: 18px; }
.xp-stats__label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Filter chips */
.xp-filters {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin: 0 0 36px;
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--border);
}
.xp-chip {
  appearance: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.02em;
  padding: 8px 16px;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background .2s ease, transform .15s ease;
}
.xp-chip:hover { color: var(--text); border-color: var(--border-strong); transform: translateY(-1px); }
.xp-chip:focus-visible { outline: 2px solid var(--violet-2); outline-offset: 2px; }
.xp-chip.is-active {
  color: var(--bg);
  background: var(--grad-primary);
  border-color: transparent;
  font-weight: 600;
}

/* Card refinements */
.timeline__card { position: relative; }
.timeline__card header {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 12px;
  row-gap: 2px;
  align-items: center;
  margin-bottom: 12px;
}
.timeline__card header h3 {
  grid-column: 2;
}
.timeline__card header .company,
.timeline__card header .period {
  grid-column: 2;
}
.xp-icon {
  grid-column: 1; grid-row: 1 / span 3;
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(139, 92, 246, 0.10);
  border: 1px solid rgba(139, 92, 246, 0.25);
  color: var(--violet-2);
  flex-shrink: 0;
}
.timeline__item--current .xp-icon {
  background: rgba(34, 211, 238, 0.10);
  border-color: rgba(34, 211, 238, 0.30);
  color: var(--cyan-2);
}
.timeline__card .period strong {
  color: var(--text);
  font-weight: 600;
  margin-right: 4px;
}

/* "Atual" badge */
.xp-badge {
  position: absolute; top: 14px; right: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--cyan-2);
  border: 1px solid rgba(34, 211, 238, 0.35);
}
.xp-badge--current::before {
  content: ""; display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan-2);
  margin-right: 6px;
  box-shadow: 0 0 6px var(--cyan-2);
  vertical-align: middle;
  animation: xpBlink 1.8s ease-in-out infinite;
}
@keyframes xpBlink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.35; }
}

/* Current job card emphasis */
.timeline__item--current .timeline__card {
  border-color: rgba(34, 211, 238, 0.28);
  background:
    linear-gradient(160deg, rgba(34, 211, 238, 0.04) 0%, var(--surface-2) 70%);
}

/* Filter / collapse states */
.timeline__item.is-hidden { display: none; }
#xp-timeline .xp-legacy { display: none; }
#xp-timeline.is-expanded .xp-legacy,
#xp-timeline:not([data-filter="all"]) .xp-legacy { display: list-item; }
#xp-timeline:not([data-filter="all"]) ~ .xp-toggle-wrap { display: none; }

/* Toggle button */
.xp-toggle-wrap {
  display: flex; justify-content: center;
  margin-top: 8px;
}
.xp-toggle {
  appearance: none;
  background: transparent;
  border: 1px dashed var(--border-strong);
  color: var(--text-dim);
  border-radius: var(--radius);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  padding: 12px 22px;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.xp-toggle:hover { color: var(--text); border-color: var(--violet-2); background: rgba(139,92,246,0.06); }
.xp-toggle:focus-visible { outline: 2px solid var(--violet-2); outline-offset: 2px; }
.xp-toggle .xp-toggle__less { display: none; }
.xp-toggle[aria-expanded="true"] .xp-toggle__more { display: none; }
.xp-toggle[aria-expanded="true"] .xp-toggle__less { display: inline; }

@media (max-width: 720px) {
  .xp-stats { grid-template-columns: 1fr 1fr; }
  .xp-stats__value { font-size: 24px; }
  .timeline__card header { grid-template-columns: 1fr; }
  .xp-icon { grid-row: auto; }
  .xp-badge { position: static; display: inline-block; margin-bottom: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .xp-badge--current::before { animation: none; }
}