@charset "UTF-8";

    :root {
      --sidebar-width: 80px;
      --bg-color: rgba(15, 15, 26, 0.95);
      --icon-color: #a0a0ff;
      --glow-color: rgba(160, 160, 255, 0.8);
      --text-color: #ffffff;
      --transition: 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
    }

    body {
      margin: 0;
      height: 100vh;
      background: radial-gradient(circle at 50% 50%, #1a1a2e, #000);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      overflow: hidden;
    }

    .sidebar {
      position: fixed;
      left: 0; top: 0;
      height: 100%;
      width: var(--sidebar-width);
      background: var(--bg-color);
      backdrop-filter: blur(20px);
      border-right: 1px solid rgba(255,255,255,0.05);
      display: flex;
      flex-direction: column;
      align-items: center;
      padding-top: 20px;
      z-index: 9999;
      transition: transform var(--transition);
      transform: translateX(-100%);
    }

    .sidebar.open { transform: translateX(0); }

    @media (min-width: 1024px) {
      .sidebar:hover { transform: translateX(calc(-100% + 16px)); }
      .sidebar.open:hover { transform: translateX(0); }
    }

    .nav-item {
      position: relative;
      width: 64px;
      height: 64px;
      margin: 12px 0;
      border-radius: 18px;
      display: grid;
      place-items: center;
      cursor: pointer;
      transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    .nav-item i {
      font-size: 32px;
      color: var(--icon-color);
      filter: drop-shadow(0 0 10px var(--glow-color));
      transition: all 0.3s;
      pointer-events: none;
    }

    .nav-label {
      position: absolute;
      left: 80px;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(30,30,60,0.95);
      color: var(--text-color);
      padding: 8px 16px;
      border-radius: 12px;
      font-size: 14px;
      font-weight: 500;
      white-space: nowrap;
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
      border: 1px solid rgba(160,160,255,0.2);
      box-shadow: 0 8px 25px rgba(0,0,0,0.4);
    }

    .nav-label::before {
      content: '';
      position: absolute;
      left: -6px;
      top: 50%;
      transform: translateY(-50%) rotate(45deg);
      width: 10px;
      height: 10px;
      background: rgba(30,30,60,0.95);
      border-left: 1px solid rgba(160,160,255,0.2);
      border-bottom: 1px solid rgba(160,160,255,0.2);
    }

    .nav-item:hover {
      transform: scale(1.35);
      background: rgba(100,100,255,0.15);
    }
    .nav-item:hover i {
      filter: drop-shadow(0 0 25px var(--glow-color)) drop-shadow(0 0 50px var(--glow-color));
      color: #fff;
    }
    .nav-item:hover .nav-label {
      opacity: 1;
      visibility: visible;
      transform: translateY(-50%) translateX(10px);
    }
    .nav-item:hover ~ .nav-item,
    .nav-item:hover + .nav-item { transform: scale(1.15); }

    .nav-item.active {
      background: rgba(100,100,255,0.25);
    }
    .nav-item.active i {
      color: white;
      filter: drop-shadow(0 0 30px var(--glow-color));
    }

    .hamburger {
      position: absolute;
      left: 35px; top: 65px;
      width: 56px; height: 56px;
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 16px;
      display: grid;
      place-items: center;
      cursor: pointer;
      z-index: 10000;
      transition: all 0.4s var(--transition);
      transform: translate(-50%, -50%);
      box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    }
    .sidebar.open ~ .hamburger {
      left: 16px;
      top: 20px;
      width: 48px;
      height: 48px;
      opacity: 0;
      pointer-events: none;
    }
    .hamburger i { font-size: 30px; color: white; }

    .overlay { position: fixed; inset: 0; background: transparent; z-index: 9998; opacity: 0; pointer-events: none; }
    .sidebar.open ~ .overlay { opacity: 1; pointer-events: auto; }