* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.hero {
    text-align: center;
    padding: 60px 20px 40px;
    color: white;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.guide-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    background: rgba(255,255,255,0.2);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab:hover {
    background: rgba(255,255,255,0.3);
}

.tab.active {
    background: white;
    color: #667eea;
    font-weight: 600;
}

.guide-container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-card {
    text-align: center;
    animation: fadeIn 0.5s ease;
}

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

.step-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    display: block;
}

.step-title {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: #667eea;
}

.step-description {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.6;
    max-width: 500px;
    margin: 0 auto;
}

.step-visual {
    margin-top: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
    font-size: 3rem;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-back {
    background: #e0e0e0;
    color: #333;
}

.btn-back:hover:not(:disabled) {
    background: #d0d0d0;
}

.btn-back:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-next {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-next:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.step-counter {
    font-size: 1rem;
    color: #666;
}

.footer {
    text-align: center;
    padding: 40px;
    color: white;
    opacity: 0.8;
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .guide-container {
        padding: 25px;
    }
    
    .step-icon {
        font-size: 4rem;
    }
    
    .step-title {
        font-size: 1.4rem;
    }
    
    .controls {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
    }
}