:root {
    --bg-color: #f5f5f5;
    --container-bg: #FFFFFF;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-tertiary: #555555;
    --text-quaternary: #888888;
    --tabs-bg: #f0f0f0;
    --tabs-text: #e0e0e0;
    --tabs-text-active: #333333;
    --cv-option-bg: #fafafa;
    --cv-option-hover-bg: #f0f0f0;
    --note-color: #777777;
    --shadow-light: 0 4px 8px #0000001A;
    --shadow-hover: 0 4px 12px #0000001A;
    --img-border: #dddddd;
    --profile-border: #FFFFFF;
    --blue: #143E6E;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-tertiary: #c0c0c0;
    --text-quaternary: #909090;
    --tabs-bg: #3a3a3a;
    --tabs-text: #333333;
    --tabs-text-active: #e0e0e0;
    --cv-option-bg: #333333;
    --cv-option-hover-bg: #404040;
    --note-color: #a0a0a0;
    --shadow-light: 0 4px 8px #0000004D;
    --shadow-hover: 0 4px 12px #00000066;
    --img-border: #444444;
    --profile-border: #2d2d2d;
    --blue: #4A90E2;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    overflow-y: auto;
    transition: background-color 0.3s ease;
}

.container {
    background-color: var(--container-bg);
    border-radius: 10px;
    box-shadow: var(--shadow-light);
    padding: 30px 0;
    text-align: center;
    max-width: 1000px;
    width: 100%;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
}

.theme-toggle button {
    background: var(--container-bg);
    border: 2px solid var(--text-secondary);
    color: var(--text-primary);
    cursor: pointer;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 20px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.theme-toggle button:hover {
    background: var(--cv-option-hover-bg);
    transform: scale(1.1);
}

h1 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 16px;
}

.language-tabs {
    color: var(--text-secondary);
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;
    gap: 4px;
    margin: 20px 0 30px 0;
    /* background-color: var(--tabs-bg); */
    border-radius: 8px;
    padding: 4px;
    width: 100%;
    overflow-x: auto;
}

.language-tabs label {
    flex: 0 0 auto;
    padding: 10px 24px;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
}

.language-tabs input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    pointer-events: none;
}

.language-tabs input[type="radio"]:checked + label {
    color: var(--tabs-text);
    font-weight: bold;
    background: var(--blue);
}

/* .language-tabs span {
    color: var(--tabs-text);
} */

.cv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 10px;
}

.language-group .cv-grid {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: nowrap;
}

.cv-option {
    cursor: pointer;
    transition: transform 0.2s, background-color 0.3s ease;
    text-align: center;
    padding: 15px;
    border-radius: 8px;
    background-color: var(--cv-option-bg);
    flex: 1 1 40%;
    max-width: 40%;
    min-width: 0;
}

.cv-option:hover {
    transform: scale(1.05);
    background-color: var(--cv-option-hover-bg);
    box-shadow: var(--shadow-hover);
}

.cv-option img {
    width: auto;
    max-width: 400px;
    max-height: 500px;
    height: auto;
    border: 1px solid var(--img-border);
    border-radius: 5px;
    box-shadow: 0 2px 5px #0000001A;
    object-fit: contain;
    background-color: var(--container-bg);
    margin-bottom: 10px;
}

.cv-option p {
    margin: 5px 0;
    font-weight: bold;
    color: var(--text-tertiary);
}

.cv-option .version {
    font-size: 12px;
    color: var(--text-quaternary);
    font-style: italic;
}

.note {
    margin-top: 30px;
    color: var(--note-color);
    font-size: 14px;
}

.profile-picture {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
    border: 3px solid var(--profile-border);
    box-shadow: 0 4px 8px #00000033;
}

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

.language-group.hidden {
    display: none;
}

.language-group h2 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 18px;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .cv-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .language-group .cv-grid {
        gap: 10px;
    }
    .container {
        padding: 15px 0;
    }
}

@media (max-width: 480px) {
    .cv-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .language-group .cv-grid {
        gap: 8px;
    }
    .cv-option img {
        max-width: 150px;
    }
}