/* --- GENERAL LAYOUT --- */
    .container { 
      width: 90%;
      max-width: 600px; 
      margin: 40px auto;
      padding: 0 20px 20px 20px;
      box-sizing: border-box;
    }
  
    h1 { 
      text-align: center; 
      color: var(--accent-green); 
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 30px; 
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
    }

    /* --- FLASH MESSAGES --- */
    .flash-msg {
        padding: 15px;
        margin-bottom: 20px;
        border-radius: 8px;
        font-weight: 600;
        font-size: 0.95rem;
    }
    .flash-msg.success {
        background: rgba(16, 185, 129, 0.15);
        color: #d1fae5;
        border: 1px solid var(--accent-green);
    }
    .flash-msg.error {
        background: rgba(239, 68, 68, 0.15);
        color: #fee2e2;
        border: 1px solid var(--accent-red);
    }

    /* --- FILE CARD --- */
    .file-item { 
        background: var(--bg-card); 
        padding: 18px 20px; 
        border-radius: 12px; 
        border: 1px solid var(--border); 
        margin-bottom: 12px; 
        display: flex; 
        justify-content: space-between; 
        align-items: center; 
        transition: all 0.2s ease; 
        position: relative; 
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }
  
    .file-item:has(.menu-checkbox:checked) {
        z-index: 50;
    }

    .file-item:hover { 
        border-color: var(--accent-green); 
    }

    /* --- FILENAME --- */
    .filename { 
        font-family: 'JetBrains Mono', monospace; 
        font-size: 0.9rem; 
        color: #eaecef; 
        word-break: break-all; 
        margin-right: 15px; 
        flex: 1; 
    }

    /* --- SPLIT BUTTON COMPONENT --- */
    .split-btn {
        position: relative;
        display: inline-flex;
        vertical-align: middle;
        flex-shrink: 0;
    }

    .btn-main {
        background: var(--accent-green);
        color: #000; 
        padding: 8px 16px;
        border-radius: 6px 0 0 6px; 
        font-size: 0.85rem;
        font-weight: 600;
        text-decoration: none;
        border: 1px solid var(--accent-green);
        transition: background 0.2s;
        z-index: 2;
    }

    .btn-main:hover {
        background: #059669; 
        border-color: #059669;
    }

    .btn-main.disabled {
        opacity: 0.4;
        cursor: not-allowed;
        pointer-events: none;
    }

    .btn-arrow {
        background: var(--accent-green);
        color: #000;
        padding: 8px 10px;
        border-radius: 0 6px 6px 0;
        border: 1px solid var(--accent-green);
        border-left: 1px solid rgba(0,0,0,0.2);
        cursor: pointer;
        font-size: 0.75rem;
        transition: background 0.2s;
        outline: none;
    }

    .btn-arrow:hover, .btn-arrow:focus {
        background: #059669;
    }

    /* --- DROPDOWN MENU --- */
    .dropdown-menu {
        position: absolute;
        top: 100%;
        right: 0;
        margin-top: 4px;
        background: #1e2329;
        border: 1px solid #2b3139;
        border-radius: 6px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.5);
        min-width: 160px;
        z-index: 100;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.2s ease;
    }
  
    .menu-checkbox:checked ~ .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0); 
    }
  
    .dropdown-item {
        padding: 10px 14px;
        color: #eaecef;
        text-decoration: none;
        font-size: 0.85rem;
        transition: background 0.2s;
        display: flex;
        align-items: center;
        gap: 8px;
        font-weight: 500;
        white-space: nowrap;
    }

    .dropdown-item:hover {
        background: rgba(16, 185, 129, 0.1);
        color: var(--accent-green);
    }

    .dropdown-item.delete-item {
        color: #ff4d4d;
    }

    .dropdown-item.delete-item:hover {
        background: rgba(255, 77, 77, 0.1);
        color: #ff4d4d;
    }
  
    .icon-dl { 
        color: var(--accent-green); 
        flex-shrink: 0;
    }

    .icon-delete { 
        color: #ef4444; 
        flex-shrink: 0;
    }

    /* --- EMPTY STATE --- */
    .empty-state {
        text-align: center; 
        color: var(--text-dim); 
        margin-top: 40px;
        font-size: 0.95rem;
    }

    /* Mobile Adjustment */
    @media (max-width: 480px) {
        .container {
            width: 100%;
            margin-top: 20px;
            padding: 0 15px 20px 15px;
        }
        .file-item {
            padding: 15px;
        }
        h1 { font-size: 1.4rem; }
        .filename { font-size: 0.8rem; }
    }