/* Navigation Components */
.navigation {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 10px;
}

.nav-btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid rgba(255,255,255,0.3);
    padding: 12px 24px;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-btn:hover, .nav-btn.active {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.6);
    transform: translateY(-2px);
}

/* Section Components */
.section {
    display: none;
    background: white;
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.section.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

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

.section h2 {
    color: #5a67d8;
    font-size: 2em;
    margin-bottom: 20px;
    border-bottom: 3px solid #5a67d8;
    padding-bottom: 10px;
}

/* Button Components */
.btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1.1em;
    margin: 10px 5px;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-reset {
    background: linear-gradient(135deg, #e74c3c, #c0392b) !important;
    border: 2px solid #c0392b !important;
    color: white;
    box-shadow: 0 4px 8px rgba(231, 76, 60, 0.3);
}

.btn-reset:hover {
    background: linear-gradient(135deg, #c0392b, #a93226) !important;
    box-shadow: 0 8px 16px rgba(231, 76, 60, 0.4);
}

/* Card Components */
.concept-card {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 15px;
    padding: 25px;
    margin: 15px 0;
    transition: all 0.3s ease;
}

.concept-card:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.hook-box {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    padding: 30px;
    border-radius: 15px;
    margin: 20px 0;
    position: relative;
    overflow: hidden;
}

.hook-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.1);
    transform: rotate(45deg);
}

.hook-box h3 {
    font-size: 1.5em;
    margin-bottom: 15px;
}

.interactive-area {
    background: #f8f9ff;
    border: 2px solid #e2e8f0;
    border-radius: 15px;
    padding: 30px;
    margin: 20px 0;
}

/* Visual Demo Components */
.visual-demo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px 0;
    gap: 20px;
}

/* Progress Components */
.progress-bar {
    width: 100%;
    height: 20px;
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    margin: 20px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transition: width 0.5s ease;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.stat-card {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
}

.stat-value {
    font-size: 2em;
    font-weight: bold;
    margin-bottom: 5px;
}

/* Chart Components */
.chart-container {
    width: 100%;
    height: 400px;
    margin: 20px 0;
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navigation {
        flex-direction: column;
    }
    
    .nav-btn {
        width: 100%;
        text-align: center;
    }

    .visual-demo {
        flex-direction: column;
        gap: 10px;
    }
}