:root {
      --bg: #F5F3EF;
      --surface: #FFFFFF;
      --surface-2: #EDEAE4;
      --ink: #1C1917;
      --ink-muted: #6B6560;
      --accent: #C8540A;
      --accent-light: #FEF0E6;
      --green: #2D6A4F;
      --green-light: #E8F5EF;
      --red-light: #FEF2F2;
      --red: #B91C1C;
      --border: #E0DBD4;
      --radius: 10px;
      --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    html { scroll-behavior: smooth; }

    body {
      font-family: Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
      background: var(--bg);
      color: var(--ink);
      font-size: 16px;
      line-height: 1.65;
      min-height: 100vh;
    }

    /* HEADER */
    header {
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border);
      background: var(--bg);
      position: sticky;
      top: 0;
      z-index: 10;
    }

    .logo {
      font-family: Georgia,"Times New Roman",serif;
      font-size: 20px;
      color: var(--ink);
      text-decoration: none;
      letter-spacing: -0.3px;
    }

    .logo span {
      color: var(--accent);
    }

    nav a {
      font-size: 13px;
      color: var(--ink-muted);
      text-decoration: none;
      margin-left: 20px;
    }

    nav a:hover { color: var(--ink); }

    /* HERO */
    .hero {
      max-width: 680px;
      margin: 0 auto;
      padding: 72px 24px 56px;
      text-align: center;
    }

    .hero-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--accent);
      background: var(--accent-light);
      padding: 4px 12px;
      border-radius: 99px;
      margin-bottom: 24px;
    }

    h1 {
      font-family: Georgia,"Times New Roman",serif;
      font-size: clamp(32px, 5vw, 52px);
      line-height: 1.15;
      letter-spacing: -0.5px;
      color: var(--ink);
      margin-bottom: 18px;
    }

    h1 em {
      font-style: italic;
      color: var(--accent);
    }

    .hero-sub {
      font-size: 17px;
      color: var(--ink-muted);
      max-width: 480px;
      margin: 0 auto 36px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--ink);
      color: #fff;
      font-family: Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
      font-size: 15px;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: var(--radius);
      border: none;
      cursor: pointer;
      text-decoration: none;
      transition: background 0.15s, transform 0.1s;
    }

    .btn-primary:hover {
      background: #2D2926;
      transform: translateY(-1px);
    }

    .btn-primary:active { transform: translateY(0); }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--ink);
      font-family: Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
      font-size: 15px;
      font-weight: 500;
      padding: 13px 24px;
      border-radius: var(--radius);
      border: 1.5px solid var(--border);
      cursor: pointer;
      transition: border-color 0.15s, background 0.15s;
    }

    .btn-secondary:hover {
      border-color: var(--ink-muted);
      background: var(--surface-2);
    }

    /* TRUST BAR */
    .trust-bar {
      display: flex;
      justify-content: center;
      gap: 28px;
      flex-wrap: wrap;
      padding: 0 24px 64px;
      max-width: 680px;
      margin: 0 auto;
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 7px;
      font-size: 13px;
      color: var(--ink-muted);
    }

    .trust-item svg {
      flex-shrink: 0;
      color: var(--green);
    }

    /* CALCULATOR SECTION */
    #calculadora {
      max-width: 660px;
      margin: 0 auto;
      padding: 0 24px 80px;
    }

    .calc-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .calc-header {
      padding: 28px 32px 24px;
      border-bottom: 1px solid var(--border);
    }

    .step-indicator {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-bottom: 12px;
    }

    .step-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--border);
      transition: background 0.2s;
    }

    .step-dot.active { background: var(--accent); }
    .step-dot.done { background: var(--green); }

    .step-label {
      font-size: 12px;
      color: var(--ink-muted);
      font-weight: 500;
      letter-spacing: 0.04em;
    }

    .step-title {
      font-family: Georgia,"Times New Roman",serif;
      font-size: 22px;
      line-height: 1.3;
      color: var(--ink);
    }

    .calc-body {
      padding: 28px 32px;
    }

    /* OPTIONS GRID */
    .options-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-bottom: 28px;
    }

    .options-grid.single { grid-template-columns: 1fr; }
    .options-grid.three { grid-template-columns: 1fr 1fr 1fr; }

    @media (max-width: 520px) {
      .options-grid, .options-grid.three { grid-template-columns: 1fr 1fr; }
    }

    .option-btn {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 4px;
      padding: 14px 16px;
      background: var(--bg);
      border: 1.5px solid var(--border);
      border-radius: var(--radius);
      cursor: pointer;
      text-align: left;
      transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
      font-family: Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
    }

    .option-btn:hover {
      border-color: var(--ink-muted);
      background: var(--surface);
    }

    .option-btn.selected {
      border-color: var(--accent);
      background: var(--accent-light);
      box-shadow: 0 0 0 3px rgba(200, 84, 10, 0.1);
    }

    .option-btn .opt-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--ink);
    }

    .option-btn .opt-desc {
      font-size: 12px;
      color: var(--ink-muted);
      line-height: 1.4;
    }

    /* CHECKBOXES */
    .checkbox-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 28px;
    }

    .checkbox-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 13px 16px;
      background: var(--bg);
      border: 1.5px solid var(--border);
      border-radius: var(--radius);
      cursor: pointer;
      transition: border-color 0.15s, background 0.15s;
    }

    .checkbox-item:hover {
      border-color: var(--ink-muted);
      background: var(--surface);
    }

    .checkbox-item.checked {
      border-color: var(--accent);
      background: var(--accent-light);
    }

    .checkbox-item input[type="checkbox"] {
      width: 18px;
      height: 18px;
      accent-color: var(--accent);
      cursor: pointer;
      flex-shrink: 0;
    }

    .checkbox-item .chk-text { flex: 1; }
    .checkbox-item .chk-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--ink);
      display: block;
    }

    .checkbox-item .chk-sub {
      font-size: 12px;
      color: var(--ink-muted);
    }

    /* NAV BUTTONS */
    .calc-nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
    }

    /* RESULT SECTION */
    #resultado {
      max-width: 660px;
      margin: 0 auto;
      padding: 0 24px 80px;
      display: none;
    }

    .result-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 16px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .result-header {
      padding: 32px 32px 24px;
      border-bottom: 1px solid var(--border);
      background: var(--ink);
      color: #fff;
    }

    .result-header-tag {
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      opacity: 0.6;
      margin-bottom: 10px;
    }

    .result-wh {
      font-family: Georgia,"Times New Roman",serif;
      font-size: 42px;
      line-height: 1;
      margin-bottom: 6px;
    }

    .result-wh span {
      font-size: 20px;
      opacity: 0.7;
      font-family: Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
      font-weight: 400;
    }

    .result-categoria {
      font-size: 15px;
      opacity: 0.8;
      margin-top: 8px;
    }

    .result-body {
      padding: 28px 32px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .result-block {
      border-radius: var(--radius);
      padding: 18px 20px;
    }

    .result-block.green {
      background: var(--green-light);
      border: 1px solid #B7DFD0;
    }

    .result-block.red {
      background: var(--red-light);
      border: 1px solid #FECACA;
    }

    .result-block.neutral {
      background: var(--bg);
      border: 1px solid var(--border);
    }

    .result-block h3 {
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      margin-bottom: 10px;
    }

    .result-block.green h3 { color: var(--green); }
    .result-block.red h3 { color: var(--red); }
    .result-block.neutral h3 { color: var(--ink-muted); }

    .result-block ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .result-block ul li {
      font-size: 14px;
      padding-left: 18px;
      position: relative;
      color: var(--ink);
    }

    .result-block ul li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--green);
      font-weight: 700;
    }

    .result-block.red ul li::before { content: '×'; color: var(--red); }

    /* NO COMPRAR */
    .no-comprar-item {
      border: 1px solid #FECACA;
      border-radius: var(--radius);
      background: var(--red-light);
      padding: 14px 16px;
      margin-bottom: 8px;
    }

    .no-comprar-item:last-child { margin-bottom: 0; }

    .no-comprar-item strong {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: var(--red);
      margin-bottom: 4px;
    }

    .no-comprar-item p {
      font-size: 13px;
      color: #7F1D1D;
      line-height: 1.5;
    }

    /* PRODUCTOS */
    .productos-section criterios-section h3 {
      font-family: Georgia,"Times New Roman",serif;
      font-size: 20px;
      margin-bottom: 16px;
      color: var(--ink);
    }

    .producto-card {
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 16px 18px;
      margin-bottom: 10px;
      background: var(--surface);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .producto-card:last-child { margin-bottom: 0; }

    .producto-info { flex: 1; }

    .producto-nivel {
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: 2px 8px;
      border-radius: 99px;
      display: inline-block;
      margin-bottom: 6px;
    }

    .nivel-minimo {
      background: #E0F2FE;
      color: #0369A1;
    }

    .nivel-razonable {
      background: var(--accent-light);
      color: var(--accent);
    }

    .producto-nombre {
      font-size: 14px;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 3px;
    }

    .producto-detalle {
      font-size: 12px;
      color: var(--ink-muted);
    }

    .btn-criteria-main {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--accent);
      color: #fff;
      font-family: Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
      font-size: 13px;
      font-weight: 600;
      padding: 9px 16px;
      border-radius: 8px;
      text-decoration: none;
      white-space: nowrap;
      transition: background 0.15s, transform 0.1s;
      flex-shrink: 0;
    }

    .btn-criteria-main:hover {
      background: #A8430A;
      transform: translateY(-1px);
    }

    .btn-criteria-main svg { flex-shrink: 0; }

    /* DISCLOSURE */
    .disclosure {
      font-size: 12px;
      color: var(--ink-muted);
      padding: 14px 16px;
      background: var(--surface-2);
      border-radius: 8px;
      border-left: 3px solid var(--border);
      line-height: 1.5;
    }

    /* SUPUESTOS */
    .supuestos-toggle {
      font-size: 13px;
      color: var(--ink-muted);
      background: none;
      border: none;
      cursor: pointer;
      padding: 0;
      text-decoration: underline;
      font-family: Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
    }

    .supuestos-toggle:hover { color: var(--ink); }

    .supuestos-list {
      display: none;
      margin-top: 12px;
    }

    .supuestos-list.open { display: block; }

    .supuestos-list ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 5px;
    }

    .supuestos-list ul li {
      font-size: 13px;
      color: var(--ink-muted);
      padding-left: 16px;
      position: relative;
    }

    .supuestos-list ul li::before {
      content: '→';
      position: absolute;
      left: 0;
      color: var(--border);
    }

    /* RECALCULAR */
    .recalcular-bar {
      padding: 20px 32px;
      border-top: 1px solid var(--border);
      display: flex;
      justify-content: center;
    }

    /* COMO FUNCIONA */
    .como-funciona {
      max-width: 660px;
      margin: 0 auto;
      padding: 0 24px 80px;
    }

    .como-funciona h2 {
      font-family: Georgia,"Times New Roman",serif;
      font-size: 28px;
      margin-bottom: 8px;
    }

    .como-funciona .subtitle {
      color: var(--ink-muted);
      font-size: 15px;
      margin-bottom: 32px;
    }

    .tabla-consumos {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      margin-bottom: 24px;
    }

    .tabla-consumos th {
      text-align: left;
      padding: 10px 14px;
      background: var(--ink);
      color: #fff;
      font-weight: 600;
    }

    .tabla-consumos th:first-child { border-radius: 8px 0 0 0; }
    .tabla-consumos th:last-child { border-radius: 0 8px 0 0; }

    .tabla-consumos td {
      padding: 10px 14px;
      border-bottom: 1px solid var(--border);
      color: var(--ink);
    }

    .tabla-consumos tr:nth-child(even) td { background: var(--bg); }

    .limitaciones-box {
      background: var(--accent-light);
      border: 1px solid #F4C49A;
      border-radius: var(--radius);
      padding: 18px 20px;
      font-size: 13px;
      color: #7C2D12;
      line-height: 1.6;
    }

    .limitaciones-box strong {
      display: block;
      margin-bottom: 8px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    /* FOOTER */
    footer {
      border-top: 1px solid var(--border);
      padding: 28px 24px;
      text-align: center;
    }

    footer .footer-links {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 12px;
    }

    footer a {
      font-size: 13px;
      color: var(--ink-muted);
      text-decoration: none;
    }

    footer a:hover { color: var(--ink); }

    .footer-copy {
      font-size: 12px;
      color: var(--ink-muted);
    }

    /* DIVIDER */
    .section-divider {
      max-width: 660px;
      margin: 0 auto 48px;
      padding: 0 24px;
      border: none;
      border-top: 1px solid var(--border);
    }

    /* UTILITY */
    .hidden { display: none !important; }
    .mt-8 { margin-top: 8px; }
    .mt-16 { margin-top: 16px; }

    /* MOBILE */
    @media (max-width: 520px) {
      .calc-header, .calc-body, .result-body, .recalcular-bar {
        padding-left: 20px;
        padding-right: 20px;
      }

      .result-header { padding: 24px 20px 20px; }
      .result-wh { font-size: 34px; }
      .producto-card { flex-direction: column; align-items: flex-start; }
      .btn-criteria-main { width: 100%; justify-content: center; }
      .trust-bar { gap: 16px; }
    }

    /* STEP TRANSITIONS */
    .step { animation: stepIn 0.2s ease; }
    @keyframes stepIn {
      from { opacity: 0; transform: translateY(6px); }
      to   { opacity: 1; transform: translateY(0); }
    }
  
    /* AUTARKIO MOBILE HARDENING */
    body{overflow-x:hidden;}
    img,svg{max-width:100%;height:auto;}
    button,a{touch-action:manipulation;}
    .calc-card,.result-card,.producto-card{max-width:100%;}
    @media (max-width: 520px){
      header{align-items:flex-start;gap:10px;flex-direction:column;}
      nav{display:flex;flex-wrap:wrap;gap:6px;}
      nav a{margin-left:0;padding:6px 8px;background:rgba(255,255,255,.55);border-radius:999px;}
      .options-grid,.options-grid.three{grid-template-columns:1fr;}
      .calc-nav{flex-direction:column-reverse;align-items:stretch;}
      .calc-nav .btn-primary,.calc-nav .btn-secondary{width:100%;justify-content:center;}
      .tabla-consumos{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;}
    }