:root {
      --bg: #080a0f;
      --surface: rgba(255,255,255,0.04);
      --border: rgba(255,255,255,0.08);
      --text: #eeeae3;
      --muted: rgba(238,234,227,0.45);
      --accent: #7effd4;
      --accent2: #5b9cf6;
      --glow: rgba(126,255,212,0.15);
    }
    [data-theme="light"] {
      --bg: #f0ede8;
      --surface: rgba(0,0,0,0.04);
      --border: rgba(0,0,0,0.1);
      --text: #141414;
      --muted: rgba(20,20,20,0.5);
      --accent: #007a55;
      --accent2: #1a5bbf;
      --glow: rgba(0,122,85,0.12);
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }

    body {
      background: var(--bg);
      color: var(--text);
      font-family: 'DM Mono', monospace;
      font-weight: 300;
      font-size: 14px;
      line-height: 1.7;
      min-height: 100vh;
      overflow-x: hidden;
      transition: background 0.4s, color 0.4s;
    }

    /* ── Background ── */
    .bg-canvas {
      position: fixed;
      inset: 0;
      z-index: 0;
      pointer-events: none;
    }
    [data-theme="dark"] .bg-canvas {
      background: radial-gradient(ellipse 120% 80% at 50% 60%, #0d1a2e 0%, #080a0f 60%);
    }
    [data-theme="light"] .bg-canvas {
      background:
        radial-gradient(ellipse 55% 45% at 15% 15%, rgba(90, 150, 255, 0.22) 0%, transparent 70%),
        radial-gradient(ellipse 45% 40% at 85% 10%, rgba(160, 110, 255, 0.15) 0%, transparent 65%),
        radial-gradient(ellipse 50% 35% at 75% 85%, rgba(0, 180, 160, 0.12) 0%, transparent 65%),
        radial-gradient(ellipse 140% 90% at 50% 50%, #ccdff7 0%, #ece8f5 50%, #f0ede8 75%);
    }
    .bg-canvas::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse 60% 30% at 50% 70%, var(--glow) 0%, transparent 70%);
      animation: pulse 8s ease-in-out infinite alternate;
    }
    @keyframes pulse {
      from { opacity: 0.6; transform: scale(1); }
      to   { opacity: 1;   transform: scale(1.05); }
    }

    .stars { position: absolute; inset: 0; }
    .star {
      position: absolute;
      background: white;
      border-radius: 50%;
      animation: twinkle var(--dur, 3s) ease-in-out infinite alternate;
      animation-delay: var(--delay, 0s);
    }
    @keyframes twinkle {
      from { opacity: 0.1; }
      to   { opacity: 0.8; }
    }
    [data-theme="light"] .star {
      background: rgba(40, 60, 180, 0.9);
      animation-name: twinkle-light;
    }
    @keyframes twinkle-light {
      from { opacity: 0.15; }
      to   { opacity: 0.75; }
    }

    /* ── Nav ── */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2.5rem;
      padding: 1.2rem 2.5rem;
      transition: backdrop-filter 0.4s, background 0.4s;
    }
    nav.scrolled {
      backdrop-filter: blur(16px);
      background: rgba(8,10,15,0.6);
    }
    [data-theme="light"] nav.scrolled {
      background: rgba(240,237,232,0.7);
    }
    .nav-logo {
      font-family: 'Syne', sans-serif;
      font-weight: 700;
      font-size: 17px;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--text);
      text-decoration: none;
    }
    .nav-logo span { color: var(--accent); }
    .nav-actions { display: flex; align-items: center; gap: 1rem; }
    .nav-links { display: flex; gap: 1.8rem; list-style: none; }
    .nav-links a {
      text-decoration: none;
      color: var(--muted);
      font-size: 14px;
      letter-spacing: 0.06em;
      transition: color 0.2s;
    }
    .nav-links a:hover { color: var(--text); }
    .theme-btn {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--muted);
      width: 2rem; height: 2rem;
      border-radius: 50%;
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      font-size: 13px;
      transition: border-color 0.2s, color 0.2s, transform 0.25s;
    }
    .theme-btn:hover { border-color: var(--accent); color: var(--accent); transform: rotate(25deg); }
    .lang-btn {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--muted);
      padding: 0 0.6rem;
      height: 2rem;
      border-radius: 4px;
      cursor: pointer;
      font-family: 'DM Mono', monospace;
      font-size: 11px;
      letter-spacing: 0.06em;
      transition: border-color 0.2s, color 0.2s;
    }
    .lang-btn:hover { border-color: var(--accent); color: var(--accent); }

    /* ── Hero ── */
    .hero {
      position: relative;
      z-index: 1;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 6rem 2rem 4rem;
    }

    .avatar-wrap {
      position: relative;
      width: 120px; height: 120px;
      margin-bottom: 2rem;
      opacity: 0;
      animation: rise 0.8s ease 0.2s forwards;
    }
    .avatar-ring {
      position: absolute;
      inset: -4px;
      border-radius: 50%;
      background: conic-gradient(var(--accent), var(--accent2), var(--accent));
      animation: spin 6s linear infinite;
    }
    @keyframes spin { to { transform: rotate(360deg); } }
    .avatar-ring-mask {
      position: absolute;
      inset: 3px;
      border-radius: 50%;
      background: var(--bg);
      transition: background 0.4s;
    }
    .avatar {
      position: absolute;
      inset: 6px;
      border-radius: 50%;
      background: var(--surface);
      display: flex; align-items: center; justify-content: center;
      font-family: 'Syne', sans-serif;
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--accent);
      overflow: hidden;
    }

    .hero-name {
      font-family: 'Syne', sans-serif;
      font-size: clamp(2.2rem, 6vw, 3.8rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.05;
      opacity: 0;
      animation: rise 0.8s ease 0.35s forwards;
    }
    .hero-role {
      margin-top: 0.7rem;
      font-size: 15px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--muted);
      opacity: 0;
      animation: rise 0.8s ease 0.5s forwards;
    }
    .hero-role strong { color: var(--accent); font-weight: 400; }
    .hero-role a { color: inherit; text-decoration: none; border-bottom: 1px solid currentColor; transition: opacity 0.2s; }
    .hero-role a:hover { opacity: 0.7; }

    /* ── Social ── */
    .social {
      display: flex; gap: 0.8rem; align-items: center;
      margin-top: 1.8rem;
      opacity: 0;
      animation: rise 0.8s ease 0.65s forwards;
    }
    .social-link {
      text-decoration: none;
      color: var(--muted);
      transition: color 0.2s, transform 0.2s;
    }
    .social-link:hover {
      color: var(--accent);
      transform: translateY(-3px);
    }
    .social-link svg { width: 25px; height: 25px; fill: currentColor; display: block; }
    .social-link[aria-label="GitHub"] svg { width: 30px; height: 30px; }


    /* ── Cards ── */
    .cards-section {
      position: relative; z-index: 1;
      padding: 0 2rem 6rem;
      max-width: 900px;
      margin: 0 auto;
      opacity: 0;
      animation: rise 0.8s ease 0.15s forwards;
    }
    .section-label {
      text-align: center;
      font-size: 12px;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 2rem;
    }
    .cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 1px;
      border: 1px solid var(--border);
      border-radius: 8px;
      overflow: hidden;
      background: var(--border);
    }
    .card {
      background: var(--bg);
      padding: 1.8rem;
      text-decoration: none;
      color: inherit;
      transition: background 0.3s;
      display: flex; flex-direction: column; gap: 0.6rem;
    }
    .card:hover { background: var(--surface); }
    .card:hover .card-arrow { transform: translate(3px, -3px); color: var(--accent); }
    .card-top { display: flex; justify-content: space-between; align-items: flex-start; }
    .card-badge {
      font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase;
      padding: 0.2rem 0.5rem;
      border: 1px solid var(--border); border-radius: 2px;
      color: var(--muted);
    }
    .card-badge.oss { border-color: var(--accent); color: var(--accent); }
    .card-arrow { color: var(--muted); font-size: 1rem; transition: transform 0.2s, color 0.2s; }
    .card-title { font-family: 'Syne', sans-serif; font-size: 1.05rem; font-weight: 700; line-height: 1.3; }
    .card-desc { font-size: 12px; color: var(--muted); line-height: 1.6; }

    /* ── About ── */
    .about-section {
      position: relative; z-index: 1;
      padding: 0 2rem 6rem;
      max-width: 700px;
      margin: 0 auto;
    }
    .about-text {
      font-size: 15px;
      line-height: 1.9;
      color: var(--muted);
    }

    /* ── Timeline ── */
    .timeline-section {
      position: relative; z-index: 1;
      padding: 0 2rem 6rem;
      max-width: 700px;
      margin: 0 auto;
    }
    .timeline {
      position: relative;
      padding-left: 1.6rem;
      border-left: 1px solid var(--border);
    }
    .tl-item {
      position: relative;
      padding-bottom: 2.4rem;
    }
    .tl-item:last-child { padding-bottom: 0; }
    .tl-item::before {
      content: '';
      position: absolute;
      left: -1.6rem;
      top: 0.5rem;
      transform: translateX(-50%);
      width: 7px; height: 7px;
      border-radius: 50%;
      background: var(--bg);
      border: 1px solid var(--accent);
      transition: background 0.25s;
    }
    .tl-item:hover::before { background: var(--accent); }
    .tl-date {
      font-size: 11px;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--muted);
    }
    .tl-title {
      font-family: 'Syne', sans-serif;
      font-size: 1.05rem;
      font-weight: 700;
      line-height: 1.3;
      margin-top: 0.25rem;
    }
    .tl-title a {
      color: inherit;
      text-decoration: none;
      border-bottom: 1px solid var(--border);
      transition: color 0.2s, border-color 0.2s;
    }
    .tl-title a:hover { color: var(--accent); border-color: var(--accent); }
    .tl-desc {
      font-size: 13px;
      color: var(--muted);
      margin-top: 0.45rem;
    }

    /* ── Formulário ── */
    .form-section {
      position: relative; z-index: 1;
      padding: 0 2rem 3rem;
      max-width: 560px;
      margin: 0 auto;
      opacity: 0;
      animation: rise 0.8s ease 0.15s forwards;
    }
    .field { margin-bottom: 1.2rem; }
    .field label {
      display: block;
      font-size: 11px;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 0.45rem;
    }
    .field input,
    .field textarea {
      width: 100%;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 4px;
      color: var(--text);
      font-family: 'DM Mono', monospace;
      font-size: 14px;
      padding: 0.7rem 0.9rem;
      transition: border-color 0.2s;
    }
    .field textarea { min-height: 9rem; resize: vertical; }
    .field input:focus,
    .field textarea:focus { outline: none; border-color: var(--accent); }
    .field.invalid input,
    .field.invalid textarea { border-color: #ff6b6b; }

    /* Campo-armadilha: escondido para humanos, visível para bots que leem o HTML. */
    .trap {
      position: absolute;
      left: -9999px;
      width: 1px; height: 1px;
      opacity: 0;
    }

    .form-submit {
      width: 100%;
      background: var(--accent);
      border: none;
      border-radius: 4px;
      color: var(--bg);
      font-family: 'DM Mono', monospace;
      font-size: 13px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 0.85rem;
      cursor: pointer;
      transition: opacity 0.2s;
    }
    .form-submit:hover { opacity: 0.85; }
    .form-submit:disabled { opacity: 0.5; cursor: default; }

    .form-status {
      margin-top: 1rem;
      font-size: 13px;
      min-height: 1.4rem;
      text-align: center;
    }
    .form-status.ok { color: var(--accent); }
    .form-status.erro { color: #ff6b6b; }

    .cf-turnstile { margin-bottom: 1.2rem; }

    /* ── Alternativas ao formulário ── */
    .contact-alt {
      position: relative; z-index: 1;
      max-width: 560px;
      margin: 0 auto;
      padding: 0 2rem 5rem;
      text-align: center;
      border-top: 1px solid var(--border);
      padding-top: 2rem;
    }
    .contact-alt p { font-size: 13px; color: var(--muted); }
    .contact-email {
      display: inline-block;
      margin-top: 0.6rem;
      color: var(--accent);
      text-decoration: none;
      border-bottom: 1px solid transparent;
      cursor: pointer;
      transition: border-color 0.2s;
    }
    .contact-email:hover { border-color: var(--accent); }
    .contact-alt .social { margin-top: 1.4rem; justify-content: center; animation: none; opacity: 1; }

    /* ── Footer ── */
    /* ── Toast ── */
    .toast {
      position: fixed;
      bottom: 2rem;
      left: 50%;
      transform: translateX(-50%) translateY(1rem);
      background: var(--text);
      color: var(--bg);
      font-size: 12px;
      letter-spacing: 0.06em;
      padding: 0.6rem 1.2rem;
      border-radius: 4px;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.2s, transform 0.2s;
      z-index: 999;
    }
    .toast.show {
      opacity: 1;
      transform: translateX(-50%) translateY(0);
    }

    footer {
      position: relative; z-index: 1;
      text-align: center;
      padding: 2rem;
      font-size: 13px;
      color: var(--muted);
      letter-spacing: 0.06em;
      border-top: 1px solid var(--border);
    }

    @keyframes rise {
      from { opacity: 0; transform: translateY(18px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    /* ── Nav: página ativa ── */
    .nav-links a[aria-current="page"] {
      color: var(--accent);
    }

    /* ── Âncoras: não ficarem escondidas atrás do nav fixo ── */
    #sobre, #percurso { scroll-margin-top: 5.5rem; }

    /* ── Tags de tecnologia ── */
    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
      margin-top: 0.8rem;
    }
    .tag {
      font-size: 10px;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 0.15rem 0.5rem;
      border: 1px solid var(--border);
      border-radius: 2px;
      color: var(--muted);
    }

    /* ── Cabeçalho das páginas interiores ── */
    .page-header {
      position: relative; z-index: 1;
      padding: 8rem 2rem 2.5rem;
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
    }
    .page-title {
      font-family: 'Syne', sans-serif;
      font-size: clamp(1.8rem, 4vw, 2.6rem);
      font-weight: 800;
      letter-spacing: -0.02em;
    }
    .page-intro {
      margin-top: 0.8rem;
      color: var(--muted);
      font-size: 14px;
    }

    @media (max-width: 500px) {
      nav {
        flex-wrap: wrap;
        gap: 0.8rem 1.2rem;
        padding: 0.9rem 1.2rem;
      }
      .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 1.1rem;
      }
      .nav-links a { font-size: 12px; }
      .cards { grid-template-columns: 1fr; }
      .page-header { padding-top: 7rem; }
    }