/* Tuyệt đối không dùng selector toàn cục *, html, body để tránh ảnh hưởng theme WordPress */
.lesson-wrapper {
    font-family: 'Inter', sans-serif;
    color: #1e293b;
    background-color: #f8fafc;
    line-height: 1.6;
    padding: 20px;
    box-sizing: border-box;
    max-width: 1200px;
    margin: 0 auto;
    border-radius: 12px;
}

.lesson-wrapper * {
    box-sizing: border-box;
}

/* Bảng màu phân định mức độ & tiến độ */
.lesson-wrapper .badge-bieu { background-color: #e0f2fe; color: #0369a1; }
.lesson-wrapper .badge-hieu { background-color: #dcfce7; color: #15803d; }
.lesson-wrapper .badge-vandung { background-color: #ffedd5; color: #c2410c; }
.lesson-wrapper .badge-kho { background-color: #fee2e2; color: #b91c1c; }

/* Thanh tiến độ */
.lesson-wrapper .progress-bar-container {
    background-color: #e2e8f0;
    border-radius: 9999px;
    overflow: hidden;
    height: 12px;
    width: 100%;
}
.lesson-wrapper .progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #3b82f6, #10b981);
    transition: width 0.4s ease;
}

/* Thẻ bài học & Lộ trình */
.lesson-wrapper .roadmap-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    transition: transform 0.2s;
}
.lesson-wrapper .roadmap-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.lesson-wrapper .btn-primary {
    background-color: #2563eb;
    color: white;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
}
.lesson-wrapper .btn-primary:hover {
    background-color: #1d4ed8;
}