:root {
    --main-bg-color: #f0f2f5;
    --container-bg-color: #ffffff;
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --text-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
    --bg-image: linear-gradient(45deg, #4a90e2 0%, #50e3c2 100%);
}

body.dark-mode {
    --main-bg-color: #1a1a1a;
    --container-bg-color: #2c2c2c;
    --text-color: #f0f2f5;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --bg-image: linear-gradient(45deg, #2c3e50 0%, #000000 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--main-bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: var(--bg-image);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container {
    background-color: var(--container-bg-color);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 32px 0 var(--shadow-color);
    text-align: center;
    width: 90%;
    max-width: 500px;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

.nav-header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.nav-link {
    text-decoration: none;
    font-weight: bold;
    color: var(--primary-color);
    padding: 8px 12px;
    border-radius: 8px;
    background-color: var(--main-bg-color);
    transition: background-color 0.2s;
}

.nav-link:hover {
    background-color: var(--shadow-color);
}

.theme-toggle {
    cursor: pointer;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--text-color);
    transition: color var(--transition-speed);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.subtitle {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 30px;
    opacity: 0.8;
}

.test-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

#image-container img {
    border-radius: 12px;
    box-shadow: 0 4px 15px 0 var(--shadow-color);
    max-width: 100%;
    max-height: 400px;
}

.lotto-display {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
    min-height: 60px;
}

.lotto-ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    animation: pop-in 0.5s ease-out forwards;
}

#generate-btn {
    background-image: linear-gradient(45deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px 0 rgba(74, 144, 226, 0.4);
}

#generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(74, 144, 226, 0.5);
}

@keyframes pop-in {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

#label-container {
    width: 100%;
    margin-top: 20px;
}

.bar-container {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.label-name {
    width: 60px;
    font-weight: bold;
    text-align: right;
}

.progress-bg {
    flex-grow: 1;
    height: 12px;
    background-color: var(--main-bg-color);
    border-radius: 6px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.4s ease-out;
}

.label-percent {
    width: 45px;
    font-size: 0.9rem;
    color: var(--text-color);
    text-align: left;
}

#upload-btn {
    background-image: linear-gradient(45deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px 0 rgba(74, 144, 226, 0.4);
}

#upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(74, 144, 226, 0.5);
}

.divider {
    height: 2px;
    background: var(--shadow-color);
    margin: 40px 0;
    border-radius: 2px;
}

.inquiry-section h2, .comment-section h2 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

input, textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--shadow-color);
    border-radius: 8px;
    background-color: var(--main-bg-color);
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color var(--transition-speed);
    box-sizing: border-box;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

textarea {
    height: 100px;
    resize: vertical;
}

#submit-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.2s;
}

#submit-btn:hover {
    opacity: 0.9;
}

#disqus_thread {
    text-align: left;
}

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

    h1 {
        font-size: 2rem;
    }

    #start-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
}