:root {
      --hamburger-size: 24px;
      --hamburger-color: #fff;
      --menu-bg: #151515;
      --menu-text: #fff;
      --menu-border: #333;
      --transition-speed: 0.3s;
    }
    /* Hamburger Button */
    #hamburger-btn {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      width: var(--hamburger-size);
      height: var(--hamburger-size);
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 0;
      z-index: 1000;
    }
    #hamburger-btn .hamburger-line {
      width: 100%;
      height: 3px;
      background-color: var(--hamburger-color);
      border-radius: 2px;
      transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
    }
    /* Animate to X when open */
    #hamburger-btn.open .hamburger-line:nth-child(1) {
      transform: translateY(9px) rotate(45deg);
    }
    #hamburger-btn.open .hamburger-line:nth-child(2) {
      opacity: 0;
    }
    #hamburger-btn.open .hamburger-line:nth-child(3) {
      transform: translateY(-9px) rotate(-45deg);
    }
    /* Mobile Filter Menu */
    #mobile-filter-menu {
      position: fixed;
      top: 0;
      right: 0;
      width: 280px;
      height: 100vh;
      background: var(--menu-bg);
      color: var(--menu-text);
      transform: translateX(100%);
      transition: transform var(--transition-speed) ease;
      z-index: 999;
      padding: 1rem;
      box-shadow: -2px 0 5px rgba(0,0,0,0.5);
      display: flex;
      flex-direction: column;
    }
    #mobile-filter-menu.open {
      transform: translateX(0);
    }
    #close-filter-menu {
      align-self: flex-end;
      background: transparent;
      border: none;
      font-size: 1.5rem;
      color: var(--menu-text);
      cursor: pointer;
      margin-bottom: 1rem;
    }
    .filter-container h3 {
      margin-bottom: 1rem;
    }
    .filter-container label {
      display: block;
      margin-bottom: 0.5rem;
      font-size: 0.9rem;
    }
    .filter-container select {
      width: 100%;
      padding: 0.5rem;
      background: transparent;
      border: 1px solid var(--menu-border);
      border-radius: 4px;
      color: var(--menu-text);
      font-size: 1rem;
      margin-bottom: 1rem;
    }
    #apply-filters {
      margin-top: auto;
      padding: 0.75rem;
      background: var(--hamburger-color);
      color: #000;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 1rem;
    }