:root {
    --primary-blue: #3a7bd5;
    --secondary-blue: #00d2ff;
    --primary-purple: #6a11cb;
    --secondary-purple: #8e2de2;
    --text-dark: #2c3e50;
    --text-medium: #34495e;
    --text-light: #7f8c8d;
    --white: #ffffff;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    max-width: 650px;
    width: 100%;
    margin: 2rem auto;
    transition: all 0.3s ease;
}

h1 {
    color: var(--primary-purple);
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    text-shadow: 0 2px 8px rgba(106, 17, 203, 0.08);
}

h2 {
    color: var(--primary-blue);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    margin-top: 1.5rem;
    font-weight: 600;
    position: relative;
    padding-bottom: 0.5rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
    border-radius: 3px;
}

label {
    font-weight: 500;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
    display: block;
    font-size: 0.95rem;
}

input[type="number"],
select {
    width: 100%;
    padding: 0.75rem 0.4rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--light-bg);
    transition: all 0.3s ease;
    appearance: none;
}

input[type="number"]:focus,
select:focus {
    border-color: var(--primary-blue);
    outline: none;
    box-shadow: 0 0 0 3px rgba(58, 123, 213, 0.1);
}

input[type="checkbox"] {
    margin-right: 0.5rem;
    accent-color: var(--primary-purple);
}

select {
    background: var(--light-bg) url('data:image/svg+xml;utf8,<svg fill="%236a11cb" height="20" viewBox="0 0 24 24" width="20" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/></svg>') no-repeat right 0.75rem center/1.2em auto;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-medium);
    min-height: 44px;
    box-shadow: 0 1px 2px rgba(106, 17, 203, 0.03);
}

select option {
    color: var(--text-dark);
    background: var(--white);
    font-weight: 400;
    font-size: 1rem;
}

select:focus, select:hover {
    border-color: var(--primary-purple);
    background-color: #f0eaff;
}

.section {
    margin-bottom: 1.5rem;
}

.flex-container {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    margin-bottom: 1rem;
}

.flex-item {
    flex: 1;
    min-width: 0;
}

.result {
    background: var(--light-bg);
    color: var(--text-medium);
    border-radius: 8px;
    padding: 0.3rem;
    margin-top: 0.3rem;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    border-left: 4px solid var(--primary-blue);
}

#result {
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
    color: var(--white);
    font-size: 1.25rem;
    padding: 1.5rem;
    margin-top: 2rem;
}

.degree-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.degree-buttons label {
    margin: 0;
    padding: 0;
}

.degree-button {
    display: inline-block;
    padding: 0.6rem 2.2rem;
    border-radius: 999px;
    background: var(--light-bg);
    color: var(--primary-purple);
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    border: 2px solid var(--primary-purple);
    transition: background 0.2s, color 0.2s, border 0.2s;
    box-shadow: 0 1px 4px rgba(106, 17, 203, 0.04);
    margin: 0 0.1rem;
    user-select: none;
}

.degree-buttons input[type="radio"] {
    display: none;
}

.degree-buttons input[type="radio"]:checked + .degree-button {
    background: linear-gradient(90deg, var(--primary-purple), var(--primary-blue));
    color: #fff;
    border-color: var(--primary-blue);
    box-shadow: 0 2px 8px rgba(58, 123, 213, 0.10);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem;
    }
    h1 {
        font-size: 1.75rem;
    }
    .flex-container {
        flex-direction: column;
        gap: 0.5rem;
    }
    .flex-item {
        width: 100%;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    .container {
        padding: 1.25rem;
        border-radius: 12px;
    }
    h1 {
        font-size: 1.5rem;
    }
    h2 {
        font-size: 1.1rem;
    }
    .result {
        padding: 1rem;
        font-size: 1rem;
    }
    #result {
        font-size: 1.1rem;
        padding: 1.25rem;
    }
    .degree-button {
        padding: 0.5rem 1.2rem;
        font-size: 1rem;
    }
    .degree-buttons {
        gap: 0.2rem;
    }
}