/* =========================
       GLOBAL
    ========================= */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: Arial, sans-serif;
      color: #fff;
      background: #0e0f13;
      overflow-x: hidden;
      scroll-behavior: smooth;
    }
    h2, p {
      text-align: center;
      margin: 20px;
    }

    /* =========================
       SLIDESHOW
    ========================= */
    .slideshow-container {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      overflow: hidden;
      z-index: -1;
      perspective: 1px;
      transform-style: preserve-3d;
    }
    .slideshow {
      width: 100%;
      height: 100%;
      position: relative;
    }
    .slide {
      position: absolute;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0;
      transition: opacity 1.5s ease-in-out;
      will-change: opacity, transform;
    }
    .slide.active {
      opacity: 1;
    }

    /* =========================
       POPUP
    ========================= */
    .popup {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.9);
      display: flex;
      justify-content: center;
      align-items: center;
      flex-direction: column;
      z-index: 1000;
      transition: opacity 0.5s ease;
    }
    .popup.hidden {
      opacity: 0;
      pointer-events: none;
    }
    .popup-background img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      position: absolute;
      top: 0;
      left: 0;
      z-index: -1;
      opacity: 0.4;
    }
    .popup-content {
      position: relative;
      text-align: center;
    }

    /* Tombol masuk glowing pulse */
    #enter-btn {
      background: linear-gradient(90deg, #00c3ff, #76e4f7);
      color: #fff;
      font-size: 1.2em;
      padding: 12px 24px;
      border-radius: 30px;
      border: none;
      cursor: pointer;
      box-shadow: 0 0 10px #00c3ff,
                  0 0 20px #00c3ff,
                  0 0 30px #76e4f7;
      animation: pulseGlow 2s infinite;
      transition: transform 0.3s ease;
    }
    #enter-btn:hover {
      transform: scale(1.05);
    }
    @keyframes pulseGlow {
      0% { box-shadow: 0 0 5px #00c3ff, 0 0 10px #76e4f7; }
      50% { box-shadow: 0 0 20px #00c3ff, 0 0 40px #76e4f7; }
      100% { box-shadow: 0 0 5px #00c3ff, 0 0 10px #76e4f7; }
    }

    /* =========================
       NAVBAR
    ========================= */
    nav {
      display: none;
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 500;
    }
    nav ul {
      list-style: none;
      display: flex;
      gap: 20px;
    }
    .nav-box {
      position: relative;
      border: 2px solid transparent;
      border-radius: 12px;
      padding: 6px 14px;
      transition: 0.4s ease;
    }
    .nav-box:hover {
      border-color: #76e4f7;
      box-shadow: 0 0 10px #76e4f7,
                  0 0 20px #00c3ff,
                  0 0 30px #00c3ff;
    }
    .nav-link {
      position: relative;
      text-decoration: none;
      color: #fff;
      font-weight: bold;
      transition: color 0.3s ease;
    }
    .nav-link:hover {
      color: #76e4f7;
      text-shadow: 0 0 5px #76e4f7,
                   0 0 10px #00c3ff,
                   0 0 20px #00c3ff;
    }
    .nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -3px;
      width: 0;
      height: 2px;
      background: linear-gradient(90deg, #76e4f7, #00c3ff);
      box-shadow: 0 0 5px #76e4f7,
                  0 0 10px #00c3ff,
                  0 0 20px #00c3ff;
      transition: width 0.4s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }

    /* =========================
       CONTENT
    ========================= */
    main {
      padding: 100px 20px;
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 1s ease, transform 1s ease;
    }
    main.show {
      opacity: 1;
      transform: translateY(0);
    }

    /* Floating animasi teks */
    main h2, main p {
      animation: floaty 4s ease-in-out infinite;
    }
    @keyframes floaty {
      0%,100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    /* =========================
       PAGE TRANSITION
    ========================= */
    body.fade-out {
      opacity: 0;
      transition: opacity 0.5s ease;
    }