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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: rgba(14, 84, 171, 1);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 450px;
    padding: 40px;
    transition: all 0.3s ease;
}

.subject:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

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

.header h1 {
    color: #333;
    font-size: 28px;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    color: #666;
    font-size: 14px;
}

.user-type-toggle {
    display: flex;
    background: #f0f0f0;
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 30px;
    position: relative;
}

.user-type-btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.user-type-btn.active {
    background: rgb(243, 123, 63);
    color: black;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.user-type-btn:not(.active) {
    color: #666;
}

.form-toggle {
    display: flex;
    justify-content: center;
    margin-bottom: 25px;
}

.toggle-btn {
    background: none;
    border: none;
    color: #667eea;
    font-size: 14px;
    cursor: pointer;
    padding: 8px 16px;
    margin: 0 10px;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.toggle-btn.active {
    background: #f37b3f;
    font-size: 1rem;
    font-weight: 600;
    color: black;
}

.form-container {
    position: relative;
    overflow: hidden;
}

.form {
    display: none;
    animation: slideIn 0.5s ease;
}

.form.active {
    display: block;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
}

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

.form-row {
    display: flex;
    gap: 15px;
}

.form-row .form-group {
    flex: 1;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: rgb(243, 123, 63);
    font-size: 1rem;
    font-weight: 600;
    color: black;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.submit-btn:active {
    transform: translateY(0);
}

.required {
    color: #e74c3c;
}

.student-fields,
.professor-fields {
    display: none;
}

.student-fields.active,
.professor-fields.active {
    display: block;
}

@media (max-width: 480px) {
    .container {
        padding: 30px 20px;
        margin: 10px;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}