:root {
    --bg-color: #f0f0f0;
    --container-bg: white;
    --text-color: #333;
    --number-bg: #eee;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --accent-color: #4CAF50;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 15px 35px var(--shadow-color);
    max-width: 600px;
    width: 100%;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.section-divider {
    margin: 40px 0;
    border: 0;
    border-top: 2px dashed var(--number-bg);
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

#theme-btn {
    background: var(--container-bg);
    border: 2px solid var(--text-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

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

/* Classifier Styles */
.upload-area {
    margin: 20px 0;
    border: 3px dashed var(--number-bg);
    border-radius: 15px;
    padding: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: var(--accent-color);
    background-color: rgba(76, 175, 80, 0.05);
}

.upload-label {
    cursor: pointer;
    display: block;
}

#upload-text {
    font-size: 18px;
    color: #888;
}

.bar-container {
    margin-top: 20px;
    text-align: left;
}

.prediction-bar {
    height: 25px;
    background-color: var(--number-bg);
    border-radius: 12.5px;
    margin-bottom: 10px;
    overflow: hidden;
    position: relative;
}

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

.bar-label {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    font-weight: bold;
    color: var(--text-color);
    text-shadow: 0 0 2px var(--container-bg);
}

/* Lotto Styles */
.numbers {
    display: flex;
    justify-content: center;
    margin: 30px 0;
}

.number {
    width: 50px;
    height: 50px;
    background-color: var(--number-bg);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    margin: 0 5px;
    color: white;
    transition: all 0.3s ease;
}

#generate {
    background-color: var(--accent-color);
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s ease;
}

#generate:active {
    transform: scale(0.95);
}

/* Common UI */
.contact-section { margin-top: 50px; }
.form-group { margin-bottom: 15px; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--number-bg);
    border-radius: 8px;
    background: var(--bg-color);
    color: var(--text-color);
    box-sizing: border-box;
}

#submit-btn {
    width: 100%;
    padding: 12px;
    background: #333;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

body.dark-mode #submit-btn {
    background: #f0f0f0;
    color: #333;
}

.animate { animation: pop 0.5s ease-in-out; }
@keyframes pop {
    0% { transform: scale(0); }
    80% { transform: scale(1.2); }
    100% { transform: scale(1); }
}