:root {
      /* Palette TikTok Neon */
      --primary: #ee1d52; /* TikTok Primary Color (Red) */
      --primary-glow: rgba(238, 29, 82, 0.4);
      --secondary: #00f2ff; /* Neon Cyan (Contrasting Glow) */
      --secondary-glow: rgba(0, 242, 255, 0.4);
      --bg-dark: #050511;
      --glass-bg: rgba(20, 20, 35, 0.6);
      --glass-border: rgba(255, 255, 255, 0.08);
      --text-main: #ffffff;
      --text-muted: #a0a0b0;
      --success: #00ff9d;
      --error: #ff4d4d;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      scrollbar-width: thin;
      /* Menggunakan warna TikTok untuk scrollbar */
      scrollbar-color: var(--primary) var(--bg-dark); 
    }

    body {
      background-color: var(--bg-dark);
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(29, 0, 65, 0.8) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 45, 60, 0.8) 0%, transparent 40%);
      color: var(--text-main);
      font-family: 'Outfit', sans-serif;
      min-height: 100vh;
      overflow-x: hidden;
      position: relative;
    }

    /* Animated Background Mesh */
    body::before {
      content: '';
      position: fixed;
      top: 0; left: 0; width: 100%; height: 100%;
      background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjAwIiBoZWlnaHQ9IjIwMCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48cGF0aCBkPSJNMTAwIDB2MjAwTTAgMTAwaDIwMCIgc3Ryb2tlPSJyZ2JhKDI1NSwyNTUsMjU1LDAuMDMpIiBzdHJva2Utd2lkdGg9IjIiLz48L3N2Zz4=');
      background-size: 40px 40px;
      z-index: -1;
      opacity: 0.5;
    }

    .container {
      max-width: 1000px;
      margin: 0 auto;
      padding: 2rem 1.5rem;
      position: relative;
      z-index: 1;
    }

    /* ===== HEADER & NAV ===== */
    header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 2rem;
      animation: fadeInDown 0.8s ease;
      flex-wrap: wrap;
      gap: 1rem;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 1rem;
      cursor: pointer;
    }

    .logo-icon {
      font-size: 2rem;
      /* Menggunakan warna TikTok */
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      filter: drop-shadow(0 0 10px var(--primary-glow));
    }

    .logo-text {
      font-size: 1.5rem;
      font-weight: 800;
      letter-spacing: -0.5px;
    }

    .logo-text span {
      color: var(--primary);
    }
    
    .nav-menu {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .nav-link {
        color: var(--text-muted);
        text-decoration: none;
        font-size: 0.95rem;
        font-weight: 500;
        transition: color 0.3s;
    }
    .nav-link:hover {
        color: var(--primary);
    }


    /* ===== HERO ===== */
    .hero {
      text-align: center;
      margin: 3rem 0;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1.1;
      margin-bottom: 1rem;
      background: linear-gradient(to right, #fff, var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero p {
      color: var(--text-muted);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
    }

    .badge {
      display: inline-block;
      padding: 0.3rem 0.8rem;
      /* Menggunakan warna TikTok */
      background: rgba(238, 29, 82, 0.1); 
      border: 1px solid rgba(238, 29, 82, 0.3);
      border-radius: 50px;
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 600;
      margin-top: 10px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    /* ===== GLASS CARD (DOWNLOAD BOX) ===== */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: 24px;
      padding: 3rem 2.5rem;
      box-shadow: 0 20px 50px -10px rgba(0,0,0,0.5), inset 0 0 20px rgba(255,255,255,0.02);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      position: relative;
      overflow: hidden;
      margin-bottom: 3rem;
    }

    .glass-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; height: 1px;
      background: linear-gradient(90deg, transparent, var(--primary), transparent);
      opacity: 0.5;
    }

    .input-wrapper {
      position: relative;
      margin-bottom: 1.5rem;
    }

    .input-wrapper i {
      position: absolute;
      left: 20px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 1.2rem;
      transition: color 0.3s ease;
    }

    .url-input {
      width: 100%;
      padding: 18px 20px 18px 55px;
      background: rgba(0, 0, 0, 0.3);
      border: 2px solid var(--glass-border);
      border-radius: 12px;
      color: #fff;
      font-family: 'JetBrains Mono', monospace;
      font-size: 1rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .url-input:focus {
      outline: none;
      /* Menggunakan warna sekunder (Cyan) */
      border-color: var(--secondary);
      box-shadow: 0 0 20px var(--secondary-glow);
      background: rgba(0, 0, 0, 0.5);
    }

    .url-input:focus + i {
      color: var(--secondary);
    }

    .download-btn {
      width: 100%;
      /* Menggunakan warna TikTok: Red ke Cyan */
      padding: 18px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      border: none;
      border-radius: 12px;
      color: #000;
      font-weight: 800;
      font-size: 1.1rem;
      text-transform: uppercase;
      letter-spacing: 1px;
      cursor: pointer;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
      box-shadow: 0 0 15px var(--primary-glow);
    }

    .download-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px var(--secondary-glow);
      color: #fff;
    }
    
    .download-btn:disabled {
        opacity: 0.7;
        cursor: not-allowed;
    }

    /* ===== LOADING BAR ===== */
    .progress-wrapper {
      height: 4px;
      background: rgba(255,255,255,0.1);
      border-radius: 4px;
      margin-top: 20px;
      overflow: hidden;
      display: none;
    }

    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      width: 0%;
      box-shadow: 0 0 10px var(--secondary);
      transition: width 0.3s ease;
    }

    /* ===== RESULT VIDEO CARD ===== */
    .result-area {
      display: none;
      margin-top: 2rem;
      animation: slideUp 0.5s ease;
    }

    .video-card {
      background: rgba(0,0,0,0.4);
      border-radius: 16px;
      border: 1px solid var(--glass-border);
      padding: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .video-header {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--primary);
      font-weight: 700;
    }

    video {
      width: 100%;
      border-radius: 12px;
      background: #000;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
      border: 1px solid var(--glass-border);
    }

    .action-row {
      display: flex;
      gap: 10px;
      margin-top: 1.5rem;
      flex-wrap: wrap;
    }

    .btn-action {
      flex: 1;
      padding: 12px;
      border-radius: 8px;
      font-weight: 600;
      text-decoration: none;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.2s;
      min-width: 140px;
      font-size: 0.95rem;
    }

    .btn-download {
      /* Menggunakan warna TikTok */
      background: rgba(238, 29, 82, 0.15); 
      color: var(--primary);
      border: 1px solid var(--primary);
    }

    .btn-download:hover {
      background: var(--primary);
      color: #000;
      box-shadow: 0 0 15px var(--primary-glow);
    }

    .btn-copy {
      background: transparent;
      color: var(--text-muted);
      border: 1px solid var(--glass-border);
    }

    .btn-copy:hover {
      background: rgba(255,255,255,0.05);
      color: #fff;
    }

    /* ===== FEATURES GRID ===== */
    .features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 1.5rem;
      margin-top: 4rem;
    }

    .feature-item {
      background: rgba(255,255,255,0.03);
      padding: 1.5rem;
      border-radius: 16px;
      border: 1px solid transparent;
      transition: all 0.3s ease;
    }

    .feature-item:hover {
      background: rgba(255,255,255,0.06);
      border-color: rgba(255,255,255,0.1);
      transform: translateY(-5px);
    }

    .feature-icon {
      width: 50px;
      height: 50px;
      /* Menggunakan warna TikTok */
      background: linear-gradient(135deg, rgba(238, 29, 82, 0.2), rgba(0, 242, 255, 0.2));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.2rem;
      margin-bottom: 1rem;
    }

    .feature-item h3 {
      font-size: 1.2rem;
      margin-bottom: 0.5rem;
      color: #fff;
    }

    .feature-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* ===== HISTORY ===== */
    .history-panel {
      margin-top: 3rem;
      border-top: 1px solid var(--glass-border);
      padding-top: 2rem;
    }

    .history-header {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 1.5rem;
      color: var(--text-muted);
      font-size: 0.9rem;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .history-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 15px;
      background: rgba(255,255,255,0.03);
      border-radius: 8px;
      margin-bottom: 8px;
      cursor: pointer;
      transition: background 0.2s;
      border: 1px solid transparent;
    }

    .history-item:hover {
      background: rgba(255,255,255,0.07);
      border-color: rgba(255,255,255,0.1);
    }

    .history-link {
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.85rem;
      color: var(--text-main);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      max-width: 80%;
    }

    .history-delete {
      color: var(--error);
      opacity: 0.5;
      transition: opacity 0.2s;
    }

    .history-delete:hover {
      opacity: 1;
    }

    /* ===== FOOTER, TOAST, ANIMATIONS (SAMA SEPERTI SEBELUMNYA) ===== */
    footer {
      text-align: center;
      padding: 3rem 0;
      margin-top: 2rem;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    footer a {
      color: var(--primary);
      text-decoration: none;
    }

    .toast {
      position: fixed;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%) translateY(100px);
      background: rgba(10, 10, 20, 0.95);
      border: 1px solid var(--glass-border);
      color: #fff;
      padding: 12px 24px;
      border-radius: 50px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
      display: flex;
      align-items: center;
      gap: 10px;
      opacity: 0;
      transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
      z-index: 1000;
      font-size: 0.9rem;
    }

    .toast.active {
      transform: translateX(-50%) translateY(0);
      opacity: 1;
    }

    .toast.success i { color: var(--success); }
    .toast.error i { color: var(--error); }

    @keyframes fadeInDown {
      from { opacity: 0; transform: translateY(-20px); }
      to { opacity: 1; transform: translateY(0); }
    }
    
    @keyframes slideUp {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .spinner {
      width: 20px;
      height: 20px;
      border: 2px solid rgba(0,0,0,0.3);
      border-radius: 50%;
      border-top-color: #000;
      animation: spin 1s ease-in-out infinite;
      display: none;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    @media (max-width: 768px) {
      .hero h1 { font-size: 2.5rem; }
      .glass-card { padding: 1.5rem; }
      .action-row { flex-direction: column; }
    }