/* ============================================================
       RESET & VARIÁVEIS
       ============================================================ */
    *, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

    :root {
      --bg-primary:   #0a0a0a;
      --bg-card:      #141414;
      --bg-card-alt:  #1c1c1c;
      --bg-input:     #1e1e1e;
      --accent-red:   #e63946;
      --accent-gold:  #ffd700;
      --text-primary: #ffffff;
      --text-secondary:#b0b0b0;
      --text-muted:   #666666;
      --border:       #2a2a2a;
      --success:      #2ecc71;
      --font-sans:    'Inter', -apple-system, sans-serif;
      --font-serif:   'Playfair Display', Georgia, serif;
      --max-w:        1100px;
      --radius:       12px;
      /* TODO: Altere o preço do livro aqui (em centavos para o MP) */
      --book-price:   "99,70";
    }

    html { scroll-behavior: smooth; }

    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    img { max-width:100%; height:auto; display:block; }
    a { color: var(--accent-red); text-decoration:none; }
    a:hover { text-decoration:underline; }

    .container { width:90%; max-width:var(--max-w); margin:0 auto; }

    /* ============================================================
       NAV — barra fixa no topo
       ============================================================ */
    .nav {
      position: fixed; top:0; left:0; right:0; z-index:1000;
      background: rgba(10,10,10,.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      padding: 12px 0;
      transition: box-shadow .3s;
    }
    .nav.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,.5); }
    .nav .container {
      display:flex; align-items:center; justify-content:space-between;
    }
    .nav-brand {
      display: flex;
      align-items: center;
    }
    .nav-logo {
      height: 44px; /* Altura confortável para o nav de 12px padding */
      width: auto;
      display: block;
      transition: transform .2s;
    }
    .nav-logo:hover {
      transform: scale(1.05);
    }
    @media(max-width: 768px) {
      .nav-logo {
        height: 34px;
      }
    }
    .nav-cta {
      background: var(--accent-red);
      color:#fff; border:none; padding:10px 22px;
      border-radius:8px; font-weight:700; font-size:.85rem;
      cursor:pointer; transition: transform .2s, box-shadow .2s;
      font-family: var(--font-sans);
    }
    .nav-cta:hover { transform:translateY(-1px); box-shadow:0 6px 20px rgba(230,57,70,.4); }

    /* ============================================================
       HERO
       ============================================================ */
    .hero {
      min-height: 100vh; min-height:100dvh;
      display:flex; align-items:center;
      padding: 100px 0 60px;
      position:relative;
      overflow:hidden;
    }
    .hero::before {
      content:''; position:absolute; inset:0;
      background: radial-gradient(ellipse at 30% 50%, rgba(230,57,70,.08) 0%, transparent 70%);
      pointer-events:none;
    }
    .hero .container {
      display:grid;
      grid-template-columns: 1fr;
      gap: 40px;
      align-items:center;
    }
    .hero-text { text-align:center; order:2; }
    .hero-badge {
      display:inline-block; background:rgba(230,57,70,.15);
      color:var(--accent-red); padding:6px 16px;
      border-radius:20px; font-size:.75rem; font-weight:700;
      letter-spacing:1px; text-transform:uppercase;
      margin-bottom:20px; border:1px solid rgba(230,57,70,.3);
    }
    .hero-title {
      font-family:var(--font-serif); font-size:2.2rem;
      font-weight:900; line-height:1.15; margin-bottom:16px;
    }
    .hero-title span { color:var(--accent-red); }
    .hero-subtitle {
      font-size:1.05rem; color:var(--text-secondary);
      max-width:520px; margin:0 auto 12px;
    }
    .hero-prefacio {
      font-size:.9rem; color:var(--text-muted);
      margin-bottom:28px;
    }
    .hero-prefacio strong { color:var(--accent-gold); font-weight:700; }
    .hero-image { text-align:center; order:1; }
    .hero-image img {
      max-width:320px; margin:0 auto;
      border-radius:6px;
      box-shadow: 0 30px 80px rgba(0,0,0,.6), 0 0 60px rgba(230,57,70,.1);
      transition: transform .4s;
    }
    .hero-image img:hover { transform: scale(1.03) rotate(-1deg); }

    .btn-primary {
      display:inline-flex; align-items:center; gap:8px;
      background:var(--accent-red); color:#fff;
      padding:16px 36px; border-radius:10px;
      font-size:1.05rem; font-weight:800;
      border:none; cursor:pointer;
      transition: transform .2s, box-shadow .2s;
      font-family:var(--font-sans);
      text-transform:uppercase; letter-spacing:.5px;
    }
    .btn-primary:hover {
      transform:translateY(-2px);
      box-shadow: 0 12px 35px rgba(230,57,70,.45);
      text-decoration:none;
    }
    .btn-primary svg { width:20px; height:20px; }

    .hero-price {
      margin-top:20px; font-size:.85rem;
      color:var(--text-muted);
    }
    .hero-price strong {
      font-size:1.6rem; color:var(--text-primary); font-weight:900;
    }
    .hero-price .de {
      text-decoration:line-through; color:var(--text-muted);
      font-size:.85rem; margin-right:6px;
    }

    @media(min-width:768px){
      .hero .container { grid-template-columns:1fr 1fr; }
      .hero-text { text-align:left; order:1; }
      .hero-image { order:2; }
      .hero-title { font-size:3rem; }
      .hero-subtitle { margin:0 0 12px; }
    }

    /* ============================================================
       STATS BAR — Números
       ============================================================ */
    .stats {
      padding:40px 0;
      background: var(--bg-card);
      border-top:1px solid var(--border);
      border-bottom:1px solid var(--border);
    }
    .stats .container {
      display:grid;
      grid-template-columns: repeat(2, 1fr);
      gap:24px; text-align:center;
    }
    .stat-number {
      font-family:var(--font-serif);
      font-size:2.2rem; font-weight:900;
      color:var(--accent-red);
    }
    .stat-label {
      font-size:.8rem; color:var(--text-secondary);
      text-transform:uppercase; letter-spacing:.5px;
      margin-top:4px;
    }
    @media(min-width:768px){
      .stats .container { grid-template-columns: repeat(4,1fr); }
    }

    /* ============================================================
       SEÇÕES GENÉRICAS
       ============================================================ */
    .section { padding:80px 0; }
    .section-label {
      display:inline-block; background:rgba(230,57,70,.12);
      color:var(--accent-red); padding:5px 14px;
      border-radius:16px; font-size:.72rem; font-weight:700;
      text-transform:uppercase; letter-spacing:1.5px;
      margin-bottom:16px;
    }
    .section-title {
      font-family:var(--font-serif);
      font-size:1.8rem; font-weight:900;
      margin-bottom:20px; line-height:1.2;
    }
    .section-title span { color:var(--accent-red); }
    @media(min-width:768px){ .section-title { font-size:2.4rem; } }

    /* ============================================================
       SOBRE O LIVRO
       ============================================================ */
    .about { border-bottom:1px solid var(--border); }
    .about-grid {
      display:grid; gap:36px;
      grid-template-columns:1fr;
    }
    @media(min-width:768px){
      .about-grid { grid-template-columns:1fr 1fr; }
    }
    .about p { color:var(--text-secondary); margin-bottom:16px; font-size:.95rem; }
    .feature-list { list-style:none; margin-top:20px; }
    .feature-list li {
      display:flex; align-items:flex-start; gap:12px;
      padding:14px 0;
      border-bottom:1px solid var(--border);
      font-size:.9rem;
    }
    .feature-list li:last-child { border-bottom:none; }
    .feature-icon {
      flex-shrink:0; width:36px; height:36px;
      background:rgba(230,57,70,.12);
      border-radius:8px; display:flex;
      align-items:center; justify-content:center;
      font-size:1.1rem;
    }
    .feature-text strong { display:block; color:#fff; margin-bottom:2px; }
    .feature-text span { color:var(--text-secondary); font-size:.82rem; }

    /* ============================================================
       PREFÁCIO & AUTOR
       ============================================================ */
    .person-card {
      background:var(--bg-card);
      border:1px solid var(--border);
      border-radius:var(--radius);
      padding:32px;
      display:flex; flex-direction:column;
      align-items:center; text-align:center;
      gap:20px;
    }
    .person-avatar {
      flex-shrink: 0;
      width:90px; height:90px;
      border-radius:50%;
      background:var(--bg-card-alt);
      display:flex; align-items:center; justify-content:center;
      font-size:2rem; font-weight:900;
      color:var(--accent-red);
      border:3px solid var(--accent-red);
      overflow: hidden;
      padding: 5px; /* ~5% respiro interno */
    }
    .person-avatar-img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      object-fit: cover;
      object-position: center top; /* enquadra rosto + ombros */
      display: block;
    }
    .person-name {
      font-family:var(--font-serif);
      font-size:1.3rem; font-weight:900;
    }
    .person-role {
      font-size:.8rem; color:var(--accent-gold);
      text-transform:uppercase; letter-spacing:1px;
      margin-top:-12px;
    }
    .person-quote {
      font-style:italic; color:var(--text-secondary);
      font-size:.92rem; position:relative; padding:0 16px;
    }
    .person-quote::before {
      content:'"'; position:absolute; left:-4px; top:-10px;
      font-size:3rem; color:var(--accent-red); opacity:.3;
      font-family:var(--font-serif);
    }
    .persons-grid {
      display:grid; gap:28px;
      grid-template-columns:1fr;
    }
    @media(min-width:768px){
      .persons-grid { grid-template-columns:1fr 1fr; }
      .person-card { text-align:left; flex-direction:row; align-items:flex-start; }
    }

    /* ============================================================
       FORMULÁRIO DE COMPRA  ★ SEÇÃO PRINCIPAL ★
       ============================================================ */
    .buy-section {
      padding:80px 0;
      background: linear-gradient(180deg, var(--bg-primary) 0%, #0f0f0f 100%);
      border-top:1px solid var(--border);
    }
    .buy-grid {
      display:grid; gap:32px;
      grid-template-columns:1fr;
    }
    @media(min-width:900px){
      .buy-grid { grid-template-columns:1fr 380px; }
    }
    .form-card {
      background:var(--bg-card);
      border:1px solid var(--border);
      border-radius:var(--radius);
      padding:28px 24px;
    }
    .form-card h3 {
      font-size:1.05rem; font-weight:800;
      margin-bottom:20px; display:flex;
      align-items:center; gap:10px;
    }
    .form-card h3 .step-num {
      width:28px; height:28px; border-radius:50%;
      background:var(--accent-red); color:#fff;
      display:inline-flex; align-items:center; justify-content:center;
      font-size:.8rem; font-weight:800;
    }
    .form-row { margin-bottom:16px; }
    .form-row label {
      display:block; font-size:.78rem; font-weight:600;
      color:var(--text-secondary); margin-bottom:6px;
      text-transform:uppercase; letter-spacing:.5px;
    }
    .form-row input,
    .form-row select,
    .form-row textarea {
      width:100%; padding:12px 14px;
      background:var(--bg-input);
      border:1px solid var(--border);
      border-radius:8px; color:#fff;
      font-size:.95rem; font-family:var(--font-sans);
      transition: border-color .2s;
    }
    .form-row input:focus,
    .form-row select:focus {
      outline:none; border-color:var(--accent-red);
    }
    .form-row select { cursor:pointer; appearance:auto; }
    .form-row input::placeholder { color:var(--text-muted); }
    .form-grid-2 {
      display:grid; grid-template-columns:1fr 1fr; gap:12px;
    }
    .form-grid-3 {
      display:grid; grid-template-columns:1fr 100px 1fr; gap:12px;
    }
    @media(max-width:500px){
      .form-grid-2 { grid-template-columns:1fr; }
      .form-grid-3 { grid-template-columns:1fr; }
    }
    .form-row.hidden { display:none; }

    .frete-result {
      background:rgba(46,204,113,.08);
      border:1px solid rgba(46,204,113,.25);
      border-radius:8px; padding:14px;
      margin-top:12px; display:none;
    }
    .frete-result.show { display:block; }
    .frete-result.error {
      background:rgba(230,57,70,.08);
      border-color:rgba(230,57,70,.25);
    }
    .frete-region { font-weight:700; color:var(--success); }
    .frete-result.error .frete-region { color:var(--accent-red); }
    .frete-value { font-size:1.1rem; font-weight:800; }

    /* Sidebar — Resumo do pedido */
    .order-summary {
      background:var(--bg-card);
      border:1px solid var(--border);
      border-radius:var(--radius);
      padding:28px 24px;
      position:sticky; top:90px;
    }
    .order-summary h3 {
      font-size:1rem; font-weight:800; margin-bottom:20px;
      padding-bottom:16px; border-bottom:1px solid var(--border);
    }
    .order-item {
      display:flex; gap:14px; padding-bottom:20px;
      margin-bottom:20px; border-bottom:1px solid var(--border);
    }
    .order-thumb {
      width:65px; flex-shrink:0;
      border-radius:6px; overflow:hidden;
      box-shadow: 0 4px 12px rgba(0,0,0,.4);
    }
    .order-info { flex:1; }
    .order-info h4 { font-size:.88rem; font-weight:700; margin-bottom:4px; }
    .order-info p { font-size:.75rem; color:var(--text-muted); }
    .order-qty {
      display:flex; align-items:center; gap:2px;
      margin-top:10px;
    }
    .qty-btn {
      width:32px; height:32px; border-radius:6px;
      border:1px solid var(--border);
      background:var(--bg-input); color:#fff;
      font-size:1.1rem; cursor:pointer;
      display:flex; align-items:center; justify-content:center;
      transition: background .2s;
    }
    .qty-btn:hover { background:var(--accent-red); }
    .qty-val {
      width:42px; text-align:center;
      font-weight:700; font-size:1rem;
    }
    .order-line {
      display:flex; justify-content:space-between;
      padding:6px 0; font-size:.9rem;
    }
    .order-line.total {
      font-size:1.15rem; font-weight:900;
      padding-top:14px; margin-top:8px;
      border-top:1px solid var(--border);
    }
    .order-line .val { font-weight:700; }

    .btn-checkout {
      display:block; width:100%;
      background:var(--accent-red); color:#fff;
      padding:16px; border:none; border-radius:10px;
      font-size:1.05rem; font-weight:800;
      cursor:pointer; margin-top:20px;
      transition: transform .2s, box-shadow .2s;
      font-family:var(--font-sans);
      text-transform:uppercase; letter-spacing:.5px;
    }
    .btn-checkout:hover {
      transform:translateY(-2px);
      box-shadow: 0 10px 30px rgba(230,57,70,.4);
    }
    .btn-checkout:disabled {
      opacity:.5; cursor:not-allowed; transform:none;
      box-shadow:none;
    }
    .secure-note {
      display:flex; align-items:center; justify-content:center;
      gap:6px; margin-top:12px;
      font-size:.73rem; color:var(--text-muted);
    }
    .secure-note svg { width:14px; height:14px; }

    .mp-badge {
      display:flex; align-items:center; justify-content:center;
      gap:6px; margin-top:16px; padding-top:14px;
      border-top:1px solid var(--border);
      font-size:.7rem; color:var(--text-muted);
    }

    /* ============================================================
       FAQ
       ============================================================ */
    .faq { border-top:1px solid var(--border); }
    .faq-item {
      border-bottom:1px solid var(--border);
    }
    .faq-question {
      width:100%; background:none; border:none;
      color:var(--text-primary); padding:20px 0;
      font-size:.95rem; font-weight:600;
      cursor:pointer; text-align:left;
      display:flex; justify-content:space-between;
      align-items:center; gap:16px;
      font-family:var(--font-sans);
    }
    .faq-question::after {
      content:'+'; font-size:1.4rem; color:var(--accent-red);
      transition: transform .3s; flex-shrink:0;
    }
    .faq-item.open .faq-question::after {
      content:'−';
    }
    .faq-answer {
      max-height:0; overflow:hidden;
      transition: max-height .35s ease, padding .35s ease;
      color:var(--text-secondary); font-size:.88rem;
    }
    .faq-item.open .faq-answer {
      max-height:500px; padding-bottom:20px;
    }

    /* ============================================================
       FOOTER
       ============================================================ */
    .footer {
      padding:40px 0;
      border-top:1px solid var(--border);
      text-align:center;
      font-size:.78rem; color:var(--text-muted);
    }
    .footer a { color:var(--text-secondary); }

    /* ============================================================
       FLOATING MOBILE CTA
       ============================================================ */
    .float-cta {
      display:none; position:fixed;
      bottom:0; left:0; right:0;
      z-index:999; padding:12px 16px;
      background:rgba(10,10,10,.95);
      backdrop-filter:blur(10px);
      border-top:1px solid var(--border);
    }
    .float-cta.show { display:block; }
    .float-cta button { width:100%; }
    @media(min-width:900px){ .float-cta { display:none !important; } }

    /* ============================================================
       ANIMAÇÕES SUAVES (fade-in ao scroll)
       ============================================================ */
    .reveal {
      opacity:0; transform:translateY(30px);
      transition: opacity .7s ease, transform .7s ease;
    }
    .reveal.visible {
      opacity:1; transform:translateY(0);
    }

    /* ============================================================
       LOADING / SPINNER
       ============================================================ */
    .spinner {
      display:inline-block; width:18px; height:18px;
      border:2px solid rgba(255,255,255,.3);
      border-top-color:#fff;
      border-radius:50%;
      animation: spin .6s linear infinite;
      vertical-align:middle; margin-right:8px;
    }
    @keyframes spin { to { transform:rotate(360deg); } }

    /* ============================================================
       MENSAGEM DE VALIDAÇÃO
       ============================================================ */
    .field-error {
      font-size:.72rem; color:var(--accent-red);
      margin-top:4px;
    }
    .form-row input.invalid,
    .form-row select.invalid {
      border-color:var(--accent-red);
    }

    /* ============================================================
       SUCESS POPUP
       ============================================================ */
    .success-popup {
      position: fixed; inset: 0; z-index: 2000;
      background: rgba(0,0,0,0.85); backdrop-filter: blur(5px);
      display: flex; align-items: center; justify-content: center;
      opacity: 0; pointer-events: none; transition: opacity 0.3s;
      padding: 20px;
    }
    .success-popup.show {
      opacity: 1; pointer-events: auto;
    }
    .popup-content {
      background: var(--bg-card); border: 1px solid var(--border);
      border-radius: var(--radius); padding: 40px 30px;
      max-width: 480px; width: 100%; text-align: center;
      position: relative; transform: translateY(20px);
      transition: transform 0.3s;
    }
    .success-popup.show .popup-content {
      transform: translateY(0);
    }
    .popup-close {
      position: absolute; top: 15px; right: 15px;
      background: none; border: none; color: var(--text-muted);
      font-size: 1.5rem; cursor: pointer; transition: color 0.2s;
    }
    .popup-close:hover { color: var(--text-primary); }
    .popup-icon {
      font-size: 3.5rem; margin-bottom: 20px;
    }
    .popup-content h2 {
      font-family: var(--font-serif); font-size: 1.8rem;
      color: var(--success); margin-bottom: 15px;
    }
    .popup-content p {
      color: var(--text-secondary); font-size: 0.95rem;
      margin-bottom: 15px; line-height: 1.5;
    }

    /* ============================================================
       THANK YOU SECTION (Tela de Agradecimento)
       ============================================================ */
    .thank-you-section {
      padding: 100px 0 80px;
      background: linear-gradient(180deg, var(--bg-primary) 0%, #0f0f0f 100%);
      border-top: 1px solid var(--border);
      min-height: 60vh;
      display: flex;
      align-items: center;
    }
    .thank-you-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 50px 40px;
      max-width: 600px;
      margin: 0 auto;
      text-align: center;
      animation: thankYouFadeIn 0.6s ease-out;
    }
    @keyframes thankYouFadeIn {
      from { opacity: 0; transform: translateY(30px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    .thank-you-icon {
      font-size: 4rem;
      margin-bottom: 20px;
      animation: thankYouBounce 0.8s ease-out 0.3s both;
    }
    @keyframes thankYouBounce {
      0%   { transform: scale(0.3); opacity: 0; }
      50%  { transform: scale(1.15); }
      100% { transform: scale(1); opacity: 1; }
    }
    .thank-you-title {
      font-family: var(--font-serif);
      font-size: 2rem;
      font-weight: 900;
      color: var(--success);
      margin-bottom: 16px;
    }
    .thank-you-subtitle {
      color: var(--text-secondary);
      font-size: 1rem;
      margin-bottom: 32px;
      line-height: 1.6;
    }
    .thank-you-subtitle strong {
      color: var(--text-primary);
    }
    .thank-you-info {
      text-align: left;
      margin-bottom: 30px;
    }
    .thank-you-info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 16px 0;
      border-bottom: 1px solid var(--border);
    }
    .thank-you-info-item:last-child {
      border-bottom: none;
    }
    .thank-you-info-icon {
      font-size: 1.6rem;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .thank-you-info-item strong {
      display: block;
      color: var(--text-primary);
      font-size: 0.92rem;
      margin-bottom: 4px;
    }
    .thank-you-info-item p {
      color: var(--text-secondary);
      font-size: 0.85rem;
      line-height: 1.5;
      margin: 0;
    }
    .thank-you-info-item a {
      color: var(--accent-gold);
      font-weight: 600;
    }
    .thank-you-footer {
      color: var(--text-muted);
      font-size: 0.85rem;
      padding-top: 20px;
      border-top: 1px solid var(--border);
    }

    @media(max-width: 500px) {
      .thank-you-card {
        padding: 30px 20px;
      }
      .thank-you-title {
        font-size: 1.5rem;
      }
    }

    /* ============================================================
       STATUS BANNERS (avisos contextuais)
       ============================================================ */
    .status-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 14px 18px;
      border-radius: var(--radius);
      margin-bottom: 24px;
      font-size: 0.88rem;
      line-height: 1.5;
      animation: bannerSlideIn 0.3s ease-out;
    }
    @keyframes bannerSlideIn {
      from { opacity: 0; transform: translateY(-10px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    .status-banner p {
      margin: 0;
      flex: 1;
    }
    .status-banner__close {
      background: none;
      border: none;
      color: inherit;
      font-size: 1.1rem;
      cursor: pointer;
      opacity: 0.7;
      flex-shrink: 0;
      padding: 0 4px;
      transition: opacity 0.2s;
    }
    .status-banner__close:hover {
      opacity: 1;
    }
    .status-banner--warning {
      background: rgba(255, 215, 0, 0.1);
      border: 1px solid rgba(255, 215, 0, 0.3);
      color: var(--accent-gold);
    }
    .status-banner--error {
      background: rgba(230, 57, 70, 0.1);
      border: 1px solid rgba(230, 57, 70, 0.3);
      color: var(--accent-red);
    }
    .status-banner--success {
      background: rgba(46, 204, 113, 0.1);
      border: 1px solid rgba(46, 204, 113, 0.3);
      color: var(--success);
    }