<style>
    /* Základný štýl */
    body {
        font-family: 'Segoe UI', Tahoma, sans-serif;
        margin: 0;
        background-color: #f5f7fa;
        color: #2c3e50;
    }

    .header {
        background-color: #1a73e8;
        color: white;
        padding: 1rem;
    }

    .mt-4 { margin-top: 1rem; }
    .mt-2 { margin-top: 0.5rem; }
    
    .offer-form {
        border-top: 1px solid #eee;
        padding-top: 1rem;
    }

    .header-content {
        max-width: 1200px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .logo {
        font-size: 35px;
        font-weight: bold;
    }

    .credit-info {
        background-color: rgba(255, 255, 255, 0.1);
        padding: 0.5rem 1rem;
        border-radius: 8px;
    }

    .user-info {
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    /* Hlavné rozdelenie do 3 stĺpcov */
    .content-wrapper {
        display: grid;
        grid-template-columns: 1fr 2fr 1fr; /* 3 stĺpce - ľavý, stredný, pravý */
        gap: 1rem;
        padding: 1rem;
        max-width: 1400px;
        margin: 0 auto;
    }

    /* Štýly pre stĺpce */
    .side-column, .main-content {
        background: white;
        padding: 1rem;
        border-radius: 10px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        height: fit-content;
    }

    .left-column {
        grid-column: 1; /* Ľavý stĺpec */
    }

    .right-column {
        grid-column: 3; /* Pravý stĺpec */
    }

    .main-content {
        grid-column: 2; /* Stredný stĺpec */
    }

    /* Karty */
    .card {
        background: white;
        border-radius: 10px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        margin-bottom: 1rem;
        overflow: hidden;
    }

    .card-header {
        padding: 1rem;
        display: flex;
        align-items: center;
        cursor: pointer;
        border-bottom: 1px solid #eee;
    }

    .card-header:hover {
        background-color: #f8f9fa;
    }

    .card-icon {
        width: 40px;
        height: 40px;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-right: 1rem;
    }

    .icon-blue { background-color: #e8f0fe; color: #1a73e8; }
    .icon-green { background-color: #e6f4ea; color: #1e8e3e; }
    .icon-purple { background-color: #f3e8fd; color: #a142f4; }

    .card-content {
        padding: 1rem;
        display: none;
    }

    .card.active .card-content {
        display: block;
    }

    table {
        width: 100%;
        border-collapse: collapse;
    }

    th, td {
        padding: 0.75rem;
        text-align: left;
        border-bottom: 1px solid #eee;
    }

    th {
        font-weight: 500;
        color: #666;
    }

    .search-box {
        display: flex;
        gap: 1rem;
        margin-bottom: 1rem;
    }

    input[type="text"], input[type="number"] {
        flex: 1;
        padding: 0.75rem;
        border: 1px solid #ddd;
        border-radius: 8px;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        font-weight: 500;
    }

    .btn-primary {
        background-color: #1a73e8;
        color: white;
    }

    .btn-primary:hover {
        background-color: #1557b0;
    }

    .card-arrow {
        margin-left: auto;
        transition: transform 0.3s ease;
        color: #666;
    }

    .card-content {
        transition: all 0.3s ease;
    }

    .card-title {
        flex: 1;
    }

    .card-label {
        color: #666;
        font-size: 1.0rem;
    }

    .card-value {
        font-size: 1.2rem;
        font-weight: bold;
        color: #2c3e50;
    }

    .credit-label, .user-label {
        font-size: 0.8rem;
        opacity: 0.8;
    }

    .credit-amount, .user-name {
        font-weight: bold;
        font-size: 1.1rem;
    }

    .btn-logout {
        background: rgba(255, 255, 255, 0.1);
        color: white;
        border: none;
        padding: 0.5rem;
        border-radius: 50%;
        cursor: pointer;
        transition: background-color 0.3s ease;
    }

    .btn-logout:hover {
        background: rgba(255, 255, 255, 0.2);
    }

    .price-input {
        width: 100px;
        padding: 0.5rem;
        border: 1px solid #ddd;
        border-radius: 4px;
        text-align: right;
    }

    .btn-sm {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    td form {
        display: inline-block;
    }
</style>
