.readers-header {
            background: linear-gradient(135deg, #163b72, #2879c7);
            color: #fff;
            border-radius: 18px;
            padding: 30px 24px;
            margin-bottom: 24px;
            position: relative;
            overflow: hidden;
        }

        .readers-header h1 {
            font-weight: 800;
            font-size: clamp(1.6rem, 3vw, 2.4rem);
        }

        .readers-header p {
            margin-bottom: 0;
            opacity: .9;
        }

        .summary-card {
            background: #fff;
            border: 0;
            border-radius: 15px;
            padding: 20px;
            height: 100%;
            box-shadow: 0 5px 20px rgba(27, 55, 90, .06);
        }

        .summary-icon {
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: #eaf2ff;
            color: #2162b5;
            font-size: 1.35rem;
            margin-bottom: 12px;
        }

        .summary-number {
            font-size: 1.8rem;
            font-weight: 800;
            line-height: 1.2;
        }

        .summary-label {
            color: #718096;
            font-size: .88rem;
        }

        .class-card {
            height: 100%;
            border: 1px solid #e9edf4;
            border-radius: 17px;
            background: #fff;
            padding: 20px;
            box-shadow: 0 5px 18px rgba(27, 55, 90, .05);
            transition: transform .2s, box-shadow .2s;
        }

        .class-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 25px rgba(27, 55, 90, .11);
        }

        .rank-number {
            font-size: .85rem;
            font-weight: 800;
            color: #718096;
            letter-spacing: .5px;
        }

        .rank-medal {
            font-size: 2.5rem;
            line-height: 1.2;
        }

        .class-name {
            font-size: 1.2rem;
            font-weight: 800;
            color: #203453;
        }

        .badge-label {
            display: inline-block;
            border-radius: 30px;
            padding: 6px 11px;
            font-size: .75rem;
            font-weight: 700;
        }

        .gold {
            background: #fff2c7;
            color: #8a5a00;
        }

        .silver {
            background: #edf0f5;
            color: #596579;
        }

        .bronze {
            background: #f8e3d5;
            color: #945126;
        }

        .reader {
            background: #e4f4eb;
            color: #23744a;
        }

        .books-total {
            font-size: 2rem;
            font-weight: 800;
            color: #1767b1;
            line-height: 1.2;
        }

        .books-caption {
            color: #7a8798;
            font-size: .85rem;
        }

        .progress {
            height: 7px;
            background: #edf1f7;
            border-radius: 20px;
        }

        .progress-bar {
            background: linear-gradient(90deg, #2879c7, #40b8a5);
            border-radius: 20px;
        }

        .leader-card {
            border-color: #f2d98a;
            background: linear-gradient(145deg, #fffdf6, #fff);
        }

        .empty-state {
            background: #fff;
            border-radius: 16px;
            padding: 45px 20px;
            text-align: center;
            color: #718096;
        }
		
.top-class-card {
    background: linear-gradient(135deg, #fff5d6, #ffe6a0);
    border: 1px solid #f2d17a;
    border-radius: 18px;
    padding: 20px;
    box-shadow: 0 8px 22px rgba(176, 123, 17, 0.12);
    position: relative;
    overflow: hidden;
}

.top-class-trophy {
    width: 62px;
    height: 62px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    background: linear-gradient(145deg, #f8c844, #e5a20b);
    color: #fff;
    font-size: 2rem;
    box-shadow: 0 5px 12px rgba(150, 99, 0, 0.2);
}

.top-class-label {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: #946200;
    margin-bottom: 5px;
}

.top-class-name {
    font-size: clamp(1.35rem, 2vw, 1.8rem);
    font-weight: 900;
    color: #603d00;
    line-height: 1.25;
}

.top-class-caption {
    font-size: 0.82rem;
    color: #85651e;
    margin-top: 5px;
}