.tutorial-header {
    background: linear-gradient(0deg, rgba(0,0,0,0.55), rgba(0,0,0,0.55)), url('../images/TutorialBanner.webp') center/cover no-repeat;
    color: white;
    padding: 8rem 0 4rem;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
    min-height: 400px;
}

.tutorial-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.tutorial-header-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.device-detection {
    margin-top: 2rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 25px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: inline-block;
}

.detection-result {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}


.tutorial-categories {
    background: var(--bg-secondary);
    padding: 2rem 0;
    position: sticky;
    top: 70px;
    z-index: 100;
    border-bottom: 1px solid var(--border-light);
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding: 0.5rem 1rem 0 1rem;
}

.category-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 2px solid var(--border-light);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
}

.category-tab:hover,
.category-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.category-tab i {
    font-size: 1.1rem;
}


.tutorial-content {
    padding: 4rem 0;
    background: var(--bg-primary);
}

.tutorial-section {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tutorial-section.active {
    display: block;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.section-header h2 i {
    color: var(--primary-color);
}

.section-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}


.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.tutorial-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition-normal);
}

.tutorial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.tutorial-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.tutorial-card h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.tutorial-content .edition-btn,
.tutorial-content .copy-btn {
    background: var(--primary-color);
    color: #ffffff;
    border: 1px solid var(--primary-color);
}

.tutorial-content .edition-btn:hover,
.tutorial-content .copy-btn:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #ffffff;
}

.tutorial-content .edition-btn.btn-secondary {
    background: var(--bg-primary);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.tutorial-content .edition-btn.btn-secondary:hover {
    background: var(--primary-color);
    color: #ffffff;
}

.copy-btn i {
    color: #ffffff !important;
}

.server-info-box .info-item,
.info-note div,
.copy-row {
    flex-wrap: wrap;
    gap: 0.4rem;
}

.server-info-box .info-item code,
.info-note code,
.copy-row code,
.copy-row input,
.info-item code {
    white-space: normal !important;
    word-break: break-all;
    overflow-wrap: anywhere;
}

.copy-row input {
    min-width: 0;
}

@media (max-width: 600px) {
    .info-item,
    .copy-row,
    .info-note div {
        font-size: 0.95rem;
    }
}


.server-info-box {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.info-item:last-child {
    margin-bottom: 0;
}

.info-item i {
    color: var(--primary-color);
    width: 20px;
}

.info-item code {
    background: var(--bg-primary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
    font-weight: 600;
}

.info-note {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.copy-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.copy-row .copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.55rem 0.9rem;
}


.step-image.placeholder {
    border: 1px dashed var(--border-color);
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    margin-top: 1rem;
    min-height: 200px;
}

.image-placeholder {
    font-size: 0.95rem;
    text-align: center;
}

.success-message {
    margin-top: 1rem;
}

.status-online {
    color: var(--success-color);
    font-weight: 600;
}


.edition-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.edition-option {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
}

.edition-option h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.edition-option ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.edition-option li {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}


.step-by-step {
    max-width: 800px;
    margin: 0 auto;
}

.step-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition-normal);
}

.step-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    position: relative;
}

.step-number::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 40px;
    background: var(--border-color);
}

.step-item:last-child .step-number::after {
    display: none;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}


.step-image {
    margin: 1.5rem 0;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.step-image img {
    width: 100%;
    height: auto;
    display: block;
}

.image-caption {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.8rem;
    text-align: center;
    font-size: 0.9rem;
}


.step-form {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-light);
    border-radius: 8px;
    background: var(--bg-primary);
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
    font-weight: 600;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}


.success-message {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--success-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 15px;
    margin-top: 1rem;
    font-weight: 600;
}

.success-message i {
    font-size: 1.2rem;
}


.platform-note {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--warning-color);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: 15px;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.platform-note i {
    color: var(--primary-color);
}


.additional-tutorial {
    margin-top: 4rem;
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.additional-tutorial h3 {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.additional-tutorial h3 i {
    color: var(--secondary-color);
}

.shader-steps {
    display: grid;
    gap: 1.5rem;
}

.shader-step {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
}

.shader-step h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.shader-step p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}


.advanced-settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.setting-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition-normal);
}

.setting-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.setting-card h3 {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.setting-card h3 i {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.setting-card ul {
    list-style: none;
}

.setting-card li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.setting-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

.setting-card li:last-child {
    margin-bottom: 0;
}


@media (max-width: 768px) {
    .page-title {
        font-size: 2.5rem;
    }
    
    .category-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.5rem;
    }
    
    .category-tab {
        flex-shrink: 0;
    }
    
    .tutorial-grid {
        grid-template-columns: 1fr;
    }
    
    .edition-comparison {
        grid-template-columns: 1fr;
    }
    
    .step-item {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .step-number {
        align-self: flex-start;
    }
    
    .step-number::after {
        display: none;
    }
    
    .section-header h2 {
        flex-direction: column;
        gap: 0.5rem;
        font-size: 2rem;
    }
    
    .advanced-settings-grid {
        grid-template-columns: 1fr;
    }
    
    .device-detection {
        margin-top: 1rem;
        padding: 0.8rem 1.5rem;
    }
    
    .detection-result {
        flex-direction: column;
        gap: 0.3rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .tutorial-header {
        padding: 6rem 0 3rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .tutorial-card,
    .step-item,
    .additional-tutorial,
    .setting-card {
        padding: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .section-description {
        font-size: 1rem;
    }
    
    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .step-content h3 {
        font-size: 1.2rem;
    }
}


.tutorial-section.active {
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-item {
    animation: slideInLeft 0.6s ease forwards;
}

.step-item:nth-child(even) {
    animation: slideInRight 0.6s ease forwards;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.tutorial-card,
.setting-card {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


@media print {
    .navbar,
    .tutorial-categories,
    .footer {
        display: none;
    }
    
    .tutorial-header {
        background: none;
        color: black;
        padding: 2rem 0;
        margin-top: 0;
    }
    
    .tutorial-section {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .step-item {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}