.tutorial-card {
    background: linear-gradient(145deg, rgba(0, 0, 0, 0.9), rgba(20, 20, 20, 0.9));
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    margin: 20px auto;
    padding: 30px;
    max-width: 1000px;
    height: 900px;
    overflow-y: auto;
    font-family: 'Segoe UI', Arial, sans-serif;
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-color);
}

.tutorial-card::-webkit-scrollbar {
    width: 6px;
}

.tutorial-card::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 3px;
}

.tutorial-card::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #2d2e2f, #222527);
    border-radius: 3px;
}

.tutorial-header {
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.8), rgba(20, 20, 20, 0.8));
    padding: 25px;
    margin: -30px -30px 30px -30px;
    position: sticky;
    top: -30px;
    z-index: 100;
    border-bottom: 2px solid #242628;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tutorial-header h2 {
    color: #fff;
    margin: 0;
    font-size: 32px;
    text-align: center;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #a99b9b, #8b9da8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tutorial-section {
    margin: 40px 0;
    padding: 25px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.tutorial-section h3 {
    color: #bfccd5;
    font-size: 26px;
    margin: 0 0 25px 0;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
}

.tutorial-section h3::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, #a9becc, #828d94);
    margin-right: 12px;
    border-radius: 2px;
}

.content-block {
    margin: 25px 0;
    padding: 25px;
    background: rgba(52, 152, 219, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(52, 152, 219, 0.1);
    position: relative;
    overflow: hidden;
}

.content-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #b2bec6, transparent);
}

.content-block h4 {
    color: #96a8b3;
    font-size: 22px;
    margin: 0 0 20px 0;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 0.5px;
}

.content-block ul {
    list-style-type: none;
    padding-left: 0;
    margin: 0;
}

.content-block ul ul {
    padding-left: 20px;
    margin-top: 10px;
}

.content-block li {
    position: relative;
    padding-left: 25px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 12px;
}

.content-block li:before {
    content: '›';
    color: #a8b9c5;
    position: absolute;
    left: 0;
    font-size: 20px;
    line-height: 1;
    top: 2px;
}

.content-block a {
    color: #b2bec6;
    text-decoration: none;
    transition: color 0.3s ease;
    border-bottom: 1px solid rgba(178, 190, 198, 0.3);
}

.content-block a:hover {
    color: #d5e3eb;
    border-bottom-color: rgba(213, 227, 235, 0.5);
}

.video-container {
    margin: 30px 0;
    position: relative;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(52, 152, 219, 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.video-container video {
    width: 100%;
    display: block;
    border-radius: 12px;
}

.image-container {
    margin: 20px 0;
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.image-container img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .tutorial-card {
        margin: 10px;
        padding: 15px;
        height: 500px;
    }

    .tutorial-header {
        margin: -15px -15px 20px -15px;
        padding: 15px;
    }

    .tutorial-header h2 {
        font-size: 24px;
    }

    .tutorial-section {
        padding: 15px;
    }

    .content-block {
        padding: 15px;
    }
}