*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  :root {
    --bg: #0A0A0F;
    --surface: #111118;
    --border: rgba(255,255,255,0.07);
    --accent: #7C6FF7;
    --accent2: #4FC9A0;
    --text: #F0EEF8;
    --muted: #8B899E;
    --muted2: #5A5870;
    --card-bg: rgba(255,255,255,0.02);
    --card-bg-hover: rgba(124,111,247,0.04);
    --nav-bg: rgba(10,10,15,0.85);
    --serif: 'DM Serif Display', Georgia, serif;
    --sans: 'Outfit', system-ui, sans-serif;
    --mono: 'Space Mono', monospace;
  }
  :root[data-theme="light"] {
    --bg: #FAFAFA;
    --surface: #F0F0F4;
    --border: rgba(0,0,0,0.08);
    --accent: #5C4FE0;
    --accent2: #2C9B7A;
    --text: #0F0F1A;
    --muted: #5A5870;
    --muted2: #8B899E;
    --card-bg: rgba(0,0,0,0.025);
    --card-bg-hover: rgba(92,79,224,0.06);
    --nav-bg: rgba(250,250,250,0.85);
  }
  :root[data-theme="light"] body { color-scheme: light; }

  html { scroll-behavior: smooth; }
  body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background 0.25s, color 0.25s;
  }

  /* NAV */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 5%;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
  }
  .nav-logo {
    display: flex; align-items: center; gap: 0.6rem;
    font-family: var(--serif);
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.01em;
  }
  .nav-logo img { width: 30px; height: 30px; border-radius: 6px; display: block; }
  .nav-logo span { color: var(--accent); font-style: italic; }
  .nav-right { display: flex; align-items: center; gap: 0.75rem; }
  .nav-back {
    color: var(--muted);
    font-size: 0.85rem;
    text-decoration: none;
    padding: 0.5rem 0.9rem;
    border-radius: 6px;
    transition: color 0.2s, background 0.2s;
  }
  .nav-back:hover { color: var(--text); background: var(--card-bg-hover); }

  .theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 36px; height: 36px;
    display: inline-flex;
    align-items: center; justify-content: center;
    cursor: pointer;
    color: var(--muted);
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    flex-shrink: 0;
  }
  .theme-toggle:hover { color: var(--accent); border-color: var(--accent); background: var(--card-bg-hover); }
  .theme-toggle svg { width: 18px; height: 18px; display: block; }
  .theme-toggle .icon-sun { display: none; }
  :root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
  :root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

  /* HERO */
  .hero {
    padding: 8rem 5% 3rem;
    text-align: center;
    max-width: 880px;
    margin: 0 auto;
  }
  .hero-eyebrow {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--accent);
    margin-bottom: 1.25rem;
    display: block;
  }
  .hero h1 {
    font-family: var(--serif);
    font-size: clamp(2.2rem, 5.5vw, 3.6rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
  }
  .hero h1 em { font-style: italic; color: var(--accent); }
  .hero p {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--muted);
    max-width: 620px;
    margin: 0 auto 2.5rem;
  }

  /* CONTENT */
  main {
    max-width: 880px;
    margin: 0 auto;
    padding: 2rem 5% 5rem;
  }

  /* STEP CARDS */
  .step {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 2rem 1.75rem;
    margin-bottom: 1.5rem;
    transition: border-color 0.2s, background 0.2s, transform 0.2s;
  }
  .step:hover { border-color: var(--accent); background: var(--card-bg-hover); }
  .step-header {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    margin-bottom: 1rem;
  }
  .step-num {
    font-family: var(--serif);
    font-size: 2.5rem;
    line-height: 1;
    color: var(--accent);
    font-style: italic;
    flex-shrink: 0;
    min-width: 50px;
  }
  .step-title {
    font-family: var(--serif);
    font-size: clamp(1.3rem, 3vw, 1.7rem);
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-top: 0.4rem;
  }
  .step-body {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.75;
  }
  .step-body p { margin-bottom: 0.75rem; }
  .step-body strong { color: var(--text); font-weight: 600; }
  .step-body ul {
    margin: 0.75rem 0;
    padding-left: 1.25rem;
  }
  .step-body li { margin-bottom: 0.4rem; }
  .step-body a { color: var(--accent); text-decoration: none; }
  .step-body a:hover { text-decoration: underline; }

  .step-tip {
    background: var(--surface);
    border-left: 3px solid var(--accent2);
    padding: 0.75rem 1rem;
    border-radius: 0 6px 6px 0;
    font-size: 0.88rem;
    margin-top: 1rem;
  }
  .step-tip strong { color: var(--accent2); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; display: block; margin-bottom: 0.3rem; }

  /* SECTION DIVIDER */
  .section-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 3rem 0 1.5rem;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
  }
  .section-divider::before,
  .section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
  }

  /* MATRICES LIST */
  .matrices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.6rem;
    margin: 1rem 0;
  }
  .matrices-grid a {
    display: block;
    text-align: center;
    padding: 0.65rem 0.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: border-color 0.2s, transform 0.15s;
  }
  .matrices-grid a:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    text-decoration: none;
  }

  /* CTA FINAL */
  .cta-final {
    text-align: center;
    padding: 3.5rem 1.5rem;
    margin-top: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
  }
  .cta-final h2 {
    font-family: var(--serif);
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    margin-bottom: 0.75rem;
  }
  .cta-final p {
    color: var(--muted);
    margin-bottom: 1.75rem;
    max-width: 460px;
    margin-left: auto;
    margin-right: auto;
  }
  .btn-primary {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.9rem 2rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--sans);
    text-decoration: none;
    transition: opacity 0.2s, transform 0.2s;
  }
  .btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

  /* COMPARTILHAR — botões redondos com ícones SVG, alinhados com identidade */
  .share-section {
    text-align: center;
    margin: 2rem auto;
    padding: 2rem 1.5rem;
    background: var(--card-bg, rgba(255,255,255,0.02));
    border: 1px solid var(--border);
    border-radius: 14px;
    max-width: 560px;
  }
  :root[data-theme="light"] .share-section { background: rgba(20,15,35,0.02); }
  .share-eyebrow {
    font-family: var(--mono);
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--accent);
    display: block;
    margin-bottom: 0.5rem;
  }
  .share-title {
    font-family: var(--serif);
    font-size: 1.15rem;
    margin-bottom: 0.4rem;
    color: var(--text);
  }
  .share-sub {
    font-size: 0.82rem;
    color: var(--muted);
    margin-bottom: 1.25rem;
  }
  .share-buttons {
    display: flex;
    gap: 0.65rem;
    justify-content: center;
    flex-wrap: wrap;
  }
  .share-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s, transform 0.15s, background 0.2s;
  }
  .share-btn:hover, .share-btn:focus {
    transform: translateY(-2px);
    color: var(--text);
  }
  .share-btn svg { width: 19px; height: 19px; display: block; }
  /* Cores por canal no hover */
  .share-btn.whatsapp:hover { color: #25D366; border-color: rgba(37,211,102,0.5); background: rgba(37,211,102,0.06); }
  .share-btn.telegram:hover { color: #0088CC; border-color: rgba(0,136,204,0.5); background: rgba(0,136,204,0.06); }
  .share-btn.linkedin:hover { color: #0A66C2; border-color: rgba(10,102,194,0.5); background: rgba(10,102,194,0.06); }
  .share-btn.email:hover    { color: var(--accent); border-color: var(--accent); background: rgba(124,111,247,0.06); }
  .share-btn.copy:hover     { color: var(--accent); border-color: var(--accent); background: rgba(124,111,247,0.06); }
  .share-btn.native:hover   { color: var(--accent); border-color: var(--accent); background: rgba(124,111,247,0.06); }
  .share-btn.copied {
    color: #2EC4A0 !important;
    border-color: #2EC4A0 !important;
    background: rgba(46,196,160,0.08) !important;
  }
  /* Esconde botão "compartilhar nativo" em desktop (sem Web Share API) */
  .share-btn.native { display: none; }
  @media (max-width: 700px) {
    .share-btn.native { display: inline-flex; }
  }

  /* FOOTER */
  footer {
    border-top: 1px solid var(--border);
    padding: 2rem 5%;
    text-align: center;
    font-size: 0.78rem;
    color: var(--muted);
  }
  footer a { color: var(--muted); text-decoration: none; }
  footer a:hover { color: var(--accent); }

  @media (max-width: 600px) {
    .step { padding: 1.5rem 1.25rem; }
    .step-header { gap: 0.85rem; }
    .step-num { font-size: 2rem; min-width: 36px; }
  }