* {
    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;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding-top: 50px;
}

.card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }

    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.card-header h2 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.card-header p {
    opacity: 0.9;
    font-size: 1.1rem;
}

.card-body {
    padding: 40px;
}

.navigation {
    text-align: center;
    margin-bottom: 30px;
}

.nav-btn {
    display: inline-block;
    padding: 12px 24px;
    margin: 0 10px;
    background: linear-gradient(45deg, #28a745, #20c997);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.nav-btn.info {
    background: linear-gradient(45deg, #17a2b8, #6f42c1);
    box-shadow: 0 4px 15px rgba(23, 162, 184, 0.3);
}

.nav-btn.info:hover {
    box-shadow: 0 6px 20px rgba(23, 162, 184, 0.4);
}

.separator {
    height: 2px;
    background: linear-gradient(90deg, transparent, #667eea, transparent);
    margin: 30px 0;
}

.section-title {
    font-size: 1.4rem;
    color: #333;
    margin-bottom: 25px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    transition: all 0.3s ease;
}

.form-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin: 25px 0;
}

.btn {
    padding: 15px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(45deg, #007bff, #6610f2);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.btn-secondary {
    background: linear-gradient(45deg, #6c757d, #495057);
    color: white;
    box-shadow: 0 4px 15px rgba(108, 117, 125, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 117, 125, 0.4);
}

.btn-success {
    background: linear-gradient(45deg, #28a745, #20c997);
    color: white;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.info-box {
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    border: 1px solid #bbdefb;
    border-radius: 12px;
    padding: 25px;
    margin-top: 25px;
}

.info-box h6 {
    color: #1976d2;
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: 600;
}

.info-box ul {
    list-style: none;
    margin: 0;
}

.info-box li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.info-box li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #1976d2;
    font-weight: bold;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.error {
    color: #dc3545;
    background: #f8d7da;
    border-color: #f5c6cb;
}

@media (max-width: 768px) {
    .container {
        padding-top: 20px;
    }

    .card-header {
        padding: 20px;
    }

    .card-header h2 {
        font-size: 1.8rem;
    }

    .card-body {
        padding: 25px;
    }

    .button-group {
        grid-template-columns: 1fr;
    }

    .navigation {
        margin-bottom: 20px;
    }

    .nav-btn {
        display: block;
        margin: 10px 0;
    }
}