:root {
    --bg-color: #f0f0f0;
    --container-bg: #fff;
    --text-color: #333;
    --btn-bg: #4CAF50;
    --btn-text: #fff;
    --number-bg: #f0f0f0;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-color: #f0f0f0;
    --btn-bg: #45a049;
    --btn-text: #fff;
    --number-bg: #3d3d3d;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    max-width: 600px;
    width: 90%;
    margin: 2rem auto;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.subtitle {
    opacity: 0.7;
    margin-bottom: 2rem;
}

#upload-area {
    border: 2px dashed var(--text-color);
    border-radius: 15px;
    padding: 3rem 1rem;
    cursor: pointer;
    transition: all 0.3s;
    opacity: 0.6;
}

#upload-area:hover {
    opacity: 1;
    background-color: rgba(0,0,0,0.05);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

#face-image {
    max-width: 100%;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

#result-container {
    margin: 1.5rem 0;
}

.result-bar-wrapper {
    margin-bottom: 1rem;
}

.label-text {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.3rem;
    font-weight: bold;
}

.bar-bg {
    background-color: var(--number-bg);
    height: 20px;
    border-radius: 10px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background-color: var(--btn-bg);
    width: 0%;
    transition: width 0.5s ease-out;
}

#retry-btn {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 1rem;
}

#loading {
    font-style: italic;
    margin: 1rem 0;
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: 2px solid var(--text-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s;
}

#theme-toggle:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

#generate-btn {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 2rem;
    transition: transform 0.1s, background-color 0.3s;
}

#generate-btn:active {
    transform: scale(0.98);
}

#numbers-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.number {
    background-color: var(--number-bg);
    color: var(--text-color);
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.4rem;
    font-weight: bold;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        transition: background-color 0.3s;
    }
    
    /* Contact Form Styles */
    .divider {
        margin: 2.5rem 0 1.5rem;
        border: none;
        border-top: 1px solid var(--text-color);
        opacity: 0.1;
    }
    
    .contact-section h3 {
        margin-bottom: 1rem;
        font-size: 1.2rem;
        color: var(--text-color);
    }
    
    .form-group {
        margin-bottom: 0.8rem;
    }
    
    input[type="email"],
    textarea {
        width: 100%;
        padding: 0.8rem;
        border-radius: 6px;
        border: 1px solid var(--text-color);
        background-color: transparent;
        color: var(--text-color);
        font-size: 0.9rem;
        box-sizing: border-box;
        transition: border-color 0.3s;
        opacity: 0.8;
    }
    
    input[type="email"]:focus,
    textarea:focus {
        outline: none;
        border-color: var(--btn-bg);
        opacity: 1;
    }
    
    textarea {
        min-height: 100px;
        resize: vertical;
    }
    
    .submit-btn {
        width: 100%;
        background-color: var(--btn-bg);
        color: var(--btn-text);
        padding: 0.8rem;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-weight: bold;
        font-size: 1rem;
        transition: opacity 0.3s, transform 0.1s;
    }
    
    .submit-btn:hover {
        opacity: 0.9;
    }
    
    .submit-btn:active {
        transform: scale(0.98);
    }