*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --bg:      #b7dffd;
      --surface: #ffffff;
      --border:  #cce0f5;
      --accent:  #2196F3;
      --text:    #443030;
      --muted:   #877a7a;
    }
    body { font-family: system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

    /* Header */
    header {
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      position: sticky; top: 0; z-index: 10;
    }
    .logo { font-size: 20px; font-weight: 700; color: var(--accent); text-decoration: none; }
    .btn-registro {
      background: var(--accent); color: #fff; border: none;
      border-radius: 8px; padding: 10px 20px; font-size: 14px;
      font-weight: 700; cursor: pointer; text-decoration: none;
      transition: opacity 0.2s;
    }
    .btn-registro:hover { opacity: 0.88; }
    .btn-login {
      background: transparent; color: var(--accent);
      border: 1.5px solid var(--accent); border-radius: 8px;
      padding: 9px 18px; font-size: 14px; font-weight: 600;
      cursor: pointer; text-decoration: none; transition: all 0.2s;
    }
    .btn-login:hover { background: var(--accent); color: #fff; }

    /* Hero */
    .hero {
      text-align: center;
      padding: 48px 20px 32px;
      max-width: 640px;
      margin: 0 auto;
    }
    .hero h1 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
    .hero p { font-size: 15px; color: var(--muted); line-height: 1.7; }
    .hero .gratis {
      display: inline-block;
      background: #dcfce7; color: #16a34a;
      border-radius: 20px; padding: 6px 18px;
      font-size: 13px; font-weight: 700;
      margin-top: 16px;
    }

    /* Planes */
    .planes-wrap {
      max-width: 1200px;
      margin: 0 auto;
      padding: 16px 16px 60px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .plan-card {
      background: var(--surface);
      border: 2px solid var(--border);
      border-radius: 16px;
      padding: 28px 24px;
      display: flex;
      flex-direction: column;
      gap: 0;
      transition: box-shadow 0.2s;
    }
    .plan-card:hover { box-shadow: 0 4px 20px rgba(33,150,243,0.15); }
    .plan-card.destacado {
      border-color: var(--accent);
      position: relative;
    }
    .plan-card.destacado::before {
      content: '⭐ Más popular';
      position: absolute;
      top: -14px; left: 50%;
      transform: translateX(-50%);
      background: var(--accent); color: #fff;
      font-size: 12px; font-weight: 700;
      padding: 4px 16px; border-radius: 20px;
      white-space: nowrap;
    }

    .plan-nombre { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
    .plan-precio {
      font-size: 32px; font-weight: 700;
      color: var(--accent); margin: 12px 0 4px;
      line-height: 1;
    }
    .plan-precio span { font-size: 14px; font-weight: 400; color: var(--muted); }
    .plan-anual { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
    .plan-features {
      list-style: none;
      font-size: 14px;
      line-height: 2;
      color: var(--muted);
      flex: 1;
      margin-bottom: 24px;
    }
    .plan-features li::before { content: '✓ '; color: var(--accent); font-weight: 700; }

    .btn-plan {
      width: 100%;
      background: var(--accent); color: #fff;
      border: none; border-radius: 10px;
      padding: 14px; font-size: 15px; font-weight: 700;
      cursor: pointer; text-decoration: none;
      display: block; text-align: center;
      transition: opacity 0.2s;
    }
    .btn-plan:hover { opacity: 0.88; }
    .btn-plan.outline {
      background: transparent; color: var(--accent);
      border: 2px solid var(--accent);
    }
    .btn-plan.outline:hover { background: var(--accent); color: #fff; }

    /* Loading */
    .loading { text-align: center; padding: 60px 20px; color: var(--muted); font-size: 15px; }