:root {
        --primary-color: #0A2A66;
        --secondary-color: #0D4EA6;
        --accent-color: #F59E0B;
        --light-gray: #F5FAFF;
        --border-color: #D6E4F0;
        --text-dark: #1F2937;
        --text-muted: #6B7280;
    }

    /* General Page Layout */
    .container-fluid {
        max-width: 1400px;
    }

    .row {
        gap: 24px;
    }

    /* Sidebar Filters */
    .filter-sidebar {
        height: 100%;
        position: sticky;
        top: 100px;
    }

    .filter-section {
        background: white;
        border-radius: 12px;
        padding: 24px;
        margin-bottom: 24px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
        transition: transform 0.3s;
    }

    .filter-section:hover {
        transform: translateY(-2px);
    }

    /* Universe Switch */
    .universe-switch {
        display: flex;
        border-radius: 12px;
        overflow: hidden;
        margin-bottom: 32px;
        box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
    }

    .universe-switch-item {
        flex: 1;
        padding: 18px 12px;
        text-align: center;
        cursor: pointer;
        transition: all 0.3s;
        font-weight: 600;
    }

    .universe-switch-item.selected {
        background-color: var(--primary-color);
        color: white;
        box-shadow: inset 0 -3px 0 var(--accent-color);
    }

    .universe-switch-item:not(.selected):hover {
        background-color: var(--light-gray);
    }

    /* Search Inputs */
    .search-bar-item {
        display: flex;
        align-items: center;
        padding: 14px 12px;
        border-bottom: 1px solid var(--border-color);
        transition: background 0.2s;
    }

    .search-bar-item:last-child {
        border-bottom: none;
    }

    .search-bar-item:hover {
        background-color: var(--light-gray);
    }

    .search-icon {
        margin-right: 12px;
        color: var(--secondary-color);
    }

    .search-input .input-label {
        font-size: 13px;
        color: var(--secondary-color);
        margin-bottom: 4px;
        font-weight: 500;
    }

    .search-input input {
        width: 100%;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        outline: none;
        padding: 8px 12px;
        font-size: 14px;
        transition: border 0.2s;
    }

    .search-input input:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 2px rgba(10, 42, 102, 0.1);
    }

    /* Checkbox & Toggle Items */
    .checkbox-item,
    .toggle-item {
        display: flex;
        align-items: center;
        padding: 10px 12px;
        border-radius: 8px;
        margin-bottom: 10px;
        transition: background 0.2s;
    }

    .checkbox-item:hover,
    .toggle-item:hover {
        background-color: var(--light-gray);
    }

    .checkbox-item input {
        margin-right: 12px;
    }

    /* Range Sliders */
    .range-slider-inputs {
        display: flex;
        gap: 12px;
        margin-top: 20px;
    }

    .range-input .input-group-text {
        background-color: var(--light-gray);
        border: none;
    }

    .range-input input {
        border-radius: 8px;
        border: 1px solid var(--border-color);
        padding: 6px 10px;
    }

    /* Counter Controls */
    .counter-filter {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 20px;
    }

    .counter-btn {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        border: 1px solid var(--border-color);
        background: white;
        cursor: pointer;
        transition: background 0.2s, transform 0.1s;
    }

    .counter-btn:hover:not(.disabled) {
        background: var(--light-gray);
        transform: scale(1.1);
    }

    .counter-btn.disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

    .counter-value {
        min-width: 44px;
        text-align: center;
        font-weight: 500;
    }

    /* Plane Cards */
    .card-plane {
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card-plane:hover {
        transform: translateY(-5px);
        box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
    }

    /* FAQ Accordion */
    .accordion-button {
        background-color: white;
        color: var(--text-dark);
        font-weight: 600;
    }

    .accordion-button:not(.collapsed) {
        color: var(--primary-color);
    }

    .accordion-body {
        color: var(--text-muted);
        font-size: 14px;
        line-height: 1.6;
    }

    /* Scrollbars for long lists */
    .equipment-list {
        max-height: 180px;
        overflow-y: auto;
        padding-right: 4px;
    }

    .equipment-list::-webkit-scrollbar {
        width: 6px;
    }

    .equipment-list::-webkit-scrollbar-thumb {
        background: var(--secondary-color);
        border-radius: 3px;
    }

    /* Premium Buttons */
    .btn-primary {
        background: var(--primary-color);
        border: none;
        font-weight: 600;
        border-radius: 8px;
        padding: 12px 18px;
        transition: background 0.2s, transform 0.1s;
    }

    .btn-primary:hover {
        background: var(--secondary-color);
        transform: translateY(-1px);
    }

    /* Misc */
    h2,
    h3 {
        font-weight: 700;
        color: var(--text-dark);
    }

    p {
        color: var(--text-muted);
    }