/* ===== RESPONSIVE ===== */
  @media (max-width: 768px) {
    .section-inner,
    .section-inner.reverse {
      flex-direction: column;
      text-align: center;
    }

    .porthole-frame {
      width: 240px;
      height: 240px;
    }
  }

  @media (max-width: 600px) {
    .hero-overlay {
      background: linear-gradient(
        0deg,
        rgba(10, 8, 18, 0.8) 0%,
        rgba(10, 8, 18, 0.5) 40%,
        rgba(10, 8, 18, 0.1) 70%,
        transparent 100%
      );
    }

    .hero-content {
      top: auto;
      bottom: clamp(30px, 8vh, 60px);
      left: 20px;
      right: 20px;
      transform: none;
      max-width: none;
      text-align: center;
    }
  }

  /* ===== NAVBAR ===== */
  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 10000;
    background: rgba(10, 26, 53, 0.95);
    border-bottom: none;
  }

  .nav-rope { display:none!important; height:0!important; overflow:hidden!important; max-height:0!important; visibility:hidden!important; }

  /* ===== TAB SECTIONS ===== */
  .tab-content-wrapper {
    display: none;
  }

  .tab-content-wrapper.active {
    display: block;
    animation: sectionFadeIn 0.5s ease-out;
  }

  @keyframes sectionFadeIn {
    0%   { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
  }

  /* Back to top button inside sections */
  .back-to-top {
    display: block;
    text-align: center;
    padding: 24px 0 40px;
    background: #0a1a35;
  }

  .back-to-top a {
    color: rgba(212, 175, 55, 0.5);
    text-decoration: none;
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    transition: color 0.3s;
  }

  .back-to-top a:hover {
    color: #D4AF37;
  }

  /* ===== CALCULATOR ===== */
  .calculator {
    background: #0a1a35;
    padding: clamp(40px, 6vw, 80px) 20px;
    text-align: center;
  }

  .calculator h3 {
    color: #D4AF37;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 400;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
  }

  .calculator > p {
    color: rgba(232, 212, 176, 0.5);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    margin-bottom: 2em;
  }

  .calc-form {
    max-width: 480px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .calc-field {
    display: flex;
    flex-direction: column;
    text-align: left;
  }

  .calc-field label {
    color: rgba(232, 212, 176, 0.6);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 6px;
  }

  .calc-field select,
  .calc-field input[type="number"] {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(212, 175, 55, 0.2);
    color: #e8d4b0;
    font-family: 'Georgia', serif;
    font-size: 1rem;
    padding: 14px 16px;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s;
    appearance: none;
    -webkit-appearance: none;
  }

  .calc-field select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23D4AF37' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
  }

  .calc-field select:focus,
  .calc-field input[type="number"]:focus {
    border-color: rgba(212, 175, 55, 0.5);
  }

  .calc-field select option {
    background: #0a1a35;
    color: #e8d4b0;
  }

  .calc-result {
    margin-top: 12px;
    padding: 24px;
    background: rgba(212, 175, 55, 0.06);
    border: 1px solid rgba(212, 175, 55, 0.15);
    border-radius: 12px;
    text-align: center;
  }

  .calc-result-label {
    color: rgba(232, 212, 176, 0.5);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 8px;
  }

  .calc-price {
    color: #D4AF37;
    font-size: clamp(2rem, 5vw, 2.8rem);
    font-weight: 300;
    letter-spacing: 0.02em;
    transition: all 0.3s ease;
  }

  .calc-price-note {
    color: rgba(232, 212, 176, 0.35);
    font-size: 0.7rem;
    margin-top: 6px;
    letter-spacing: 0.08em;
  }

  .calc-book {
    margin-top: 20px;
  }

  /* ===== PERFECT FOR ===== */
  .perfect-for {
    background: #0a1a35;
    padding: clamp(40px, 6vw, 80px) 20px;
    text-align: center;
  }

  .perfect-for h3 {
    color: #D4AF37;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 400;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
  }

  .perfect-for > p {
    color: rgba(232, 212, 176, 0.5);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    margin-bottom: 2.5em;
  }

  .pf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
  }

  .pf-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(212, 175, 55, 0.1);
    border-radius: 16px;
    padding: 32px 20px;
    transition: transform 0.3s, border-color 0.3s, background 0.3s;
    cursor: default;
  }

  .pf-card:hover {
    transform: translateY(-4px);
    border-color: rgba(212, 175, 55, 0.3);
    background: rgba(212, 175, 55, 0.04);
  }

  .pf-icon {
    font-size: 2.4rem;
    display: block;
    margin-bottom: 14px;
  }

  .pf-card h4 {
    color: #e8d4b0;
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
  }

  .pf-card p {
    color: rgba(232, 212, 176, 0.45);
    font-size: 0.8rem;
    line-height: 1.5;
    letter-spacing: 0.03em;
  }