:root {
    --gradient-primary: -webkit-linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: -webkit-linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: -webkit-linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.glass {
    background: rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-gradient {
    background: -webkit-linear-gradient(135deg, #0A2540 0%, #1a365d 50%, #2d3748 100%);
    background: linear-gradient(135deg, #0A2540 0%, #1a365d 50%, #2d3748 100%);
    background-size: 400% 400%;
    -webkit-animation: gradientShift 15s ease infinite;
    animation: gradientShift 15s ease infinite;
}

.course-card {
    -webkit-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.course-card::before {
    background: -webkit-linear-gradient(90deg, transparent, rgba(0, 196, 154, 0.2), transparent);
    background: linear-gradient(90deg, transparent, rgba(0, 196, 154, 0.2), transparent);
    -webkit-transition: left 0.5s;
    transition: left 0.5s;
}

.smart-hover {
    -webkit-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.smart-hover::after {
    background: -webkit-radial-gradient(circle, rgba(0, 196, 154, 0.3) 0%, transparent 70%);
    background: radial-gradient(circle, rgba(0, 196, 154, 0.3) 0%, transparent 70%);
    -webkit-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.progress-bar {
    background: -webkit-linear-gradient(90deg, #00C49A 0%, #4facfe 100%);
    background: linear-gradient(90deg, #00C49A 0%, #4facfe 100%);
    -webkit-transition: width 1s ease-in-out;
    transition: width 1s ease-in-out;
}

.spinner {
    -webkit-animation: spin 1s linear infinite;
    animation: spin 1s linear infinite;
}

.form-input {
    -webkit-transition: all 0.3s ease;
    transition: all 0.3s ease;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.form-input:focus {
    -webkit-box-shadow: 0 0 0 3px rgba(0, 196, 154, 0.1);
    box-shadow: 0 0 0 3px rgba(0, 196, 154, 0.1);
    -webkit-transform: translateY(-2px);
    transform: translateY(-2px);
}

.tab-btn {
    -webkit-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.tab-content {
    -webkit-transition: opacity 0.3s ease-in-out;
    transition: opacity 0.3s ease-in-out;
}

.dot-indicator {
    -webkit-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.dot-indicator.active {
    -webkit-transform: scale(1.5);
    transform: scale(1.5);
}

@media only screen and (max-width: 420px) {
    body {
        -webkit-overflow-scrolling: touch;
    }
}