/* ==========================================================
   Tema — troque as cores aqui para personalizar o site todo
   ========================================================== */
:root {
  --blue-50:  #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-900: #1e3a8a;
  --navy:     #0b1f44;

  --bg:        #ffffff;
  --bg-alt:    #f4f8ff;
  --surface:   #ffffff;
  --text:      #0f172a;
  --muted:     #475569;
  --border:    #dbe4f0;
  --primary:   var(--blue-600);
  --primary-h: var(--blue-700);
  --accent-bg: var(--blue-50);
  --accent-tx: var(--blue-700);
  --hero-bg:   linear-gradient(135deg, #0b1f44 0%, #1d4ed8 60%, #3b82f6 100%);
  --shadow:    0 1px 2px rgba(15,23,42,.06), 0 8px 24px rgba(30,58,138,.08);

  --radius: 14px;
  --maxw: 1100px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg:        #07142b;
  --bg-alt:    #0b1c38;
  --surface:   #0f2445;
  --text:      #e6eefc;
  --muted:     #9fb3d1;
  --border:    #1e3a64;
  --primary:   #60a5fa;
  --primary-h: #93c5fd;
  --accent-bg: #12305c;
  --accent-tx: #bfdbfe;
  --hero-bg:   linear-gradient(135deg, #050e20 0%, #0f2a5c 60%, #1d4ed8 100%);
  --shadow:    0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #07142b; --bg-alt: #0b1c38; --surface: #0f2445; --text: #e6eefc;
    --muted: #9fb3d1; --border: #1e3a64; --primary: #60a5fa; --primary-h: #93c5fd;
    --accent-bg: #12305c; --accent-tx: #bfdbfe;
    --hero-bg: linear-gradient(135deg, #050e20 0%, #0f2a5c 60%, #1d4ed8 100%);
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}

/* ===================== Base ===================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-h); text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
:focus-visible { outline: 3px solid var(--blue-500); outline-offset: 2px; border-radius: 6px; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--primary); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip-link:focus { left: 8px; }

svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }

/* ===================== Topbar ===================== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.brand:hover { text-decoration: none; color: var(--text); }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: var(--primary); color: #fff; font-size: 14px; letter-spacing: .5px;
}
:root[data-theme="dark"] .brand-mark { color: #07142b; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a { display: block; padding: 8px 12px; border-radius: 8px; color: var(--muted); font-weight: 500; font-size: 15px; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--accent-bg); text-decoration: none; }

.theme-toggle {
  display: grid; place-items: center; width: 38px; height: 38px; margin-left: 6px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); cursor: pointer;
}
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; margin: 5px 0; background: var(--text); border-radius: 2px; transition: .2s; }

/* ===================== Hero ===================== */
.hero { background: var(--hero-bg); color: #fff; padding: 88px 0 96px; }
.hero-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.eyebrow { margin: 0 0 6px; font-family: var(--mono); color: var(--blue-200); font-size: 15px; }
.hero h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); letter-spacing: -.02em; margin-bottom: 14px; }
.roles { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
.roles span {
  padding: 4px 12px; border-radius: 999px; font-size: 14px; font-weight: 500;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
}
.lead { font-size: 1.12rem; color: #dbe7ff; max-width: 60ch; margin: 0 0 28px; }

.profile-links { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 10px;
  font-weight: 600; font-size: 15px; color: #fff;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.28); transition: .15s;
}
.btn:hover { background: rgba(255,255,255,.2); color: #fff; text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: #fff; color: var(--blue-900); border-color: #fff; }
.btn-primary:hover { background: var(--blue-50); color: var(--blue-900); }

.hero-card { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.avatar { width: 168px; height: 168px; border-radius: 50%; object-fit: cover; border: 4px solid rgba(255,255,255,.35); box-shadow: 0 12px 40px rgba(0,0,0,.25); }
.avatar-initials { display: grid; place-items: center; font-size: 56px; font-weight: 700; background: linear-gradient(135deg, #3b82f6, #1e3a8a); }
.code-card {
  margin: 0; width: 100%; max-width: 340px; padding: 18px 20px; border-radius: var(--radius);
  background: rgba(5,14,32,.55); border: 1px solid rgba(255,255,255,.14);
  font-family: var(--mono); font-size: 13.5px; line-height: 1.7; color: #e2ecff; overflow-x: auto;
}
.code-card .k { color: #93c5fd; }
.code-card .s { color: #a7f3d0; }

/* ===================== Seções ===================== */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: clamp(1.7rem, 3vw, 2.2rem); letter-spacing: -.01em; display: flex; align-items: center; gap: 12px; }
.section-title::before { content: ""; width: 6px; height: 1.1em; border-radius: 3px; background: var(--primary); }
.section-intro { color: var(--muted); margin: -4px 0 32px; max-width: 65ch; }
.sub-title { font-size: 1.1rem; margin-top: 40px; color: var(--muted); font-weight: 600; }

/* Sobre */
.about-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 40px; align-items: start; margin-top: 20px; }
.about-text p { margin: 0 0 1em; }
.stats { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.stats li {
  display: flex; align-items: center; gap: 16px; padding: 16px 20px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.stats strong { font-size: 2rem; color: var(--primary); min-width: 1.4ch; line-height: 1; }
.stats span { color: var(--muted); font-weight: 500; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 12px 0 0; padding: 0; }
.tags li { padding: 6px 14px; border-radius: 999px; background: var(--accent-bg); color: var(--accent-tx); font-size: 14px; font-weight: 500; }
.tags-sm li { padding: 3px 10px; font-size: 12.5px; }

/* Timeline */
.timeline { list-style: none; margin: 28px 0 0; padding: 0 0 0 28px; position: relative; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--border); }
.timeline-item {
  position: relative; margin-bottom: 18px; padding: 20px 24px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.timeline-item::before {
  content: ""; position: absolute; left: -28px; top: 26px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg-alt); border: 3px solid var(--primary);
}
.timeline-item.current::before { background: var(--primary); box-shadow: 0 0 0 5px color-mix(in srgb, var(--primary) 25%, transparent); }
.timeline-item h3 { font-size: 1.12rem; margin: 8px 0 4px; }
.timeline-item .inst { margin: 0; color: var(--text); font-weight: 500; }
.timeline-item .meta { margin: 2px 0 0; color: var(--muted); font-size: 14.5px; }
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 6px; font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em; background: var(--accent-bg); color: var(--accent-tx);
}
.current .badge { background: var(--primary); color: #fff; }
:root[data-theme="dark"] .current .badge { color: #07142b; }

.activities { margin: 12px 0 0; padding-left: 20px; color: var(--muted); font-size: 15px; }
.activities li { margin-bottom: 4px; }
.activities li::marker { color: var(--primary); }
.timeline-item .tags { margin-top: 14px; }

/* Projetos */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.card {
  display: flex; flex-direction: column; padding: 26px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow); transition: .2s;
}
.card:hover { transform: translateY(-3px); border-color: var(--primary); }
.card-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.card-head h3 { margin: 0; font-size: 1.3rem; }
.card-sub { margin: 0; color: var(--muted); font-size: 14px; }
.card-icon {
  display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-900)); color: #fff; font-weight: 700; font-size: 20px; font-family: var(--mono);
}
.card > p { color: var(--muted); margin: 0 0 14px; flex: 1; }
.card-links { display: flex; gap: 18px; margin-top: 18px; font-weight: 600; font-size: 15px; }

/* Publicações */
.pub-filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 26px; }
.chip {
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface);
  color: var(--muted); font: 500 14px var(--font); cursor: pointer; transition: .15s;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }
:root[data-theme="dark"] .chip.active { color: #07142b; }

.pubs { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.pub {
  display: grid; grid-template-columns: 88px 1fr; gap: 20px; padding: 22px 24px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
}
.pub[hidden] { display: none; }
.pub-year { font-family: var(--mono); font-weight: 500; color: var(--primary); font-size: 15px; padding-top: 2px; }
.pub-body h3 { font-size: 1.08rem; margin: 0 0 6px; }
.pub-authors, .pub-venue { margin: 0; color: var(--muted); font-size: 15px; }
.pub-placeholder { border-style: dashed; opacity: .8; }
.pub-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.pill {
  display: inline-block; padding: 4px 12px; border-radius: 7px; border: 1px solid var(--border);
  background: var(--accent-bg); color: var(--accent-tx); font: 600 13px var(--font); cursor: pointer;
}
.pill:hover { border-color: var(--primary); text-decoration: none; color: var(--accent-tx); }
.empty-msg { color: var(--muted); font-style: italic; }
.pub-note { margin-top: 26px; color: var(--muted); font-size: 15px; }

/* Contato */
.contact { text-align: center; }
.contact .section-title { justify-content: center; }
.contact .section-intro { margin-left: auto; margin-right: auto; }
.contact .btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
:root[data-theme="dark"] .contact .btn-primary { color: #07142b; }
.btn-lg { padding: 14px 26px; font-size: 16px; }
.contact-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 22px; list-style: none; padding: 0; margin: 28px 0 0; font-weight: 600; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 26px 0; color: var(--muted); font-size: 14px; }
.footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.footer p { margin: 0; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  padding: 10px 18px; border-radius: 10px; background: var(--navy); color: #fff; font-size: 14px; transition: .25s; z-index: 99;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Animação de entrada */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ===================== Responsivo ===================== */
@media (max-width: 860px) {
  .hero { padding: 56px 0 64px; }
  .hero-grid, .about-grid { grid-template-columns: 1fr; }
  .hero-card { order: -1; }
  .avatar { width: 120px; height: 120px; }
  .avatar-initials { font-size: 40px; }
  .code-card { display: none; }
  .stats { grid-template-columns: repeat(3, 1fr); }
  .stats li { flex-direction: column; align-items: flex-start; gap: 6px; padding: 14px; }
  .stats span { font-size: 13px; line-height: 1.3; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    padding: 10px 16px 16px; background: var(--bg); border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px; }
  .theme-toggle { margin: 8px 0 0 12px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .section { padding: 60px 0; }
  .pub { grid-template-columns: 1fr; gap: 6px; }
  .cards { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}