:root {
    --primary-color: #005A9C;
    --secondary-color: #007BFF;
    --background-color: #f0f4f8;
    --card-background: #ffffff;
    --text-color: #333;
    --light-text-color: #fff;
    --border-color: #dbe2e9;
    --success-color: #28a745;
    --shadow-color: rgba(0, 90, 156, 0.15);
}

body {
    font-family: 'Tektur', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.page-container {
    max-width: 1200px;
    margin: 0 auto;
}

.content-section {
    background-color: var(--card-background);
    padding: 30px 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px var(--shadow-color);
    margin-bottom: 30px;
}

@media (max-width: 600px) {
    .content-section {
        padding: 20px 25px;
    }
}

h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 40px;
    font-weight: 700;
    text-align: center;
}

h2,
h3 {
    color: var(--primary-color);
    font-weight: 700;
    text-align: center;
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 25px;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0px;
    margin-top: 0px;
}

p {
    line-height: 1.6;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

button {
    width: 100%;
    max-width: 400px;
    display: block;
    margin: 20px auto 0 auto;
    padding: 15px;
    background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
    color: var(--light-text-color);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-family: 'Tektur', sans-serif;
}

button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
}

button:active:not(:disabled) {
    transform: translateY(0);
}

button:disabled {
    background: #b0c4de;
    cursor: not-allowed;
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.analysis-group {
    text-align: center;
    margin-bottom: 20px;
}

.analysis-group button {
    margin: 15px auto 0 auto;
}

.divider {
    text-align: center;
    font-weight: 700;
    color: var(--border-color);
    margin: 30px 0;
}

.select-group {
    max-width: 400px;
    margin: 0 auto;
    text-align: left;
}

.select-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--primary-color);
}

.select-group select {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
    background-color: white;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: 'Tektur', sans-serif;
    cursor: pointer;
}

.select-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}

.file-upload-area {
    text-align: center;
    border: 2px dashed var(--secondary-color);
    border-radius: 12px;
    padding: 30px;
    margin: 20px auto;
    background-color: #f8faff;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.file-upload-area:hover {
    background-color: #e6f7ff;
}

.file-upload-area label {
    font-weight: 500;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 1.1rem;
}

#htmlFileInput {
    display: none;
}

#status {
    text-align: center;
    margin: 25px 0;
    font-size: 1.1em;
    color: var(--text-color);
    min-height: 25px;
    font-weight: 500;
}

.chart-container-full-width {
    display: none;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background-color: #fdfdfd;
    position: relative;
}

.calculator-container {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.description {
    color: #667;
    margin-bottom: 30px;
}

.input-group {
    margin-bottom: 25px;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--primary-color);
}

.input-group input {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: 'Tektur', sans-serif;
}

.input-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}

.result-container {
    margin-top: 30px;
    padding: 20px;
    background-color: #e6f7ff;
    border: 1px solid #91d5ff;
    border-radius: 8px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    display: none;
}

.result-container.visible {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

.result-title {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary-color);
    margin: 0;
}

.result-score {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--success-color);
    margin-top: 10px;
    margin-bottom: 10px;
}

.formula {
    margin-top: 20px;
    font-size: 0.9rem;
    color: #888;
    background: #f9f9f9;
    padding: 10px;
    border-radius: 6px;
}