:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #4cc9f0;
    --success-color: #4bb543;
    --gradient: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.hero-section {
    background: var(--gradient);
    color: white;
    padding: 100px 0 80px;
    margin-top: -20px;
    clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn-hero {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 12px 30px;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-hero:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.features-section {
    padding: 80px 0;
}

.feature-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    border: none;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.courses-section {
    padding: 60px 0;
    background: white;
}

.course-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: none;
    margin-bottom: 30px;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.course-header {
    background: var(--gradient);
    color: white;
    padding: 20px;
    text-align: center;
}

.course-body {
    padding: 25px;
}

.registration-section {
    background: white;
    border-radius: 20px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
    padding: 40px;
    margin: 50px auto;
    max-width: 500px;
}

.registration-title {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 30px;
    font-weight: 700;
}

.form-control {
    border-radius: 10px;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.25);
}

.btn-primary {
    background: var(--gradient);
    border: none;
    border-radius: 50px;
    padding: 12px 30px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.4);
}

.alert {
    border-radius: 10px;
    border: none;
}

.footer {
    margin-top: auto;
}