:root {
    --page-bg: #121212;
    --page-pattern: url("data:image/svg+xml,%3Csvg width='42' height='44' viewBox='0 0 42 44' xmlns='http://www.w3.org/2000/svg'%3E%3Cg id='Page-1' fill='none' fill-rule='evenodd'%3E%3Cg id='brick-wall' fill='%23333' fill-opacity='0.4'%3E%3Cpath d='M0 0h42v44H0V0zm1 1h40v20H1V1zM0 23h20v20H0V23zm22 0h20v20H22V23z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    --text-color: #ffffff;
    --container-bg: #1e1e1e;
    --heading-color: #bb86fc;
    --button-bg: #bb86fc;
    --button-hover-bg: #a764fa;
    --button-text: #121212;
    --fortune-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --button-shadow: rgba(187, 134, 252, 0.3);
    --button-hover-shadow: rgba(187, 134, 252, 0.5);
    --input-bg: #151515;
    --input-border: rgba(255, 255, 255, 0.18);
    --muted-color: #b9b9b9;
    --toggle-border: rgba(255, 255, 255, 0.28);
}

body.light-mode {
    --page-bg: #f5f7fb;
    --page-pattern: url("data:image/svg+xml,%3Csvg width='42' height='44' viewBox='0 0 42 44' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23d4dbe8' fill-opacity='0.45'%3E%3Cpath d='M0 0h42v44H0V0zm1 1h40v20H1V1zM0 23h20v20H0V23zm22 0h20v20H22V23z'/%3E%3C/g%3E%3C/svg%3E");
    --text-color: #1f2937;
    --container-bg: #ffffff;
    --heading-color: #2563eb;
    --button-bg: #2563eb;
    --button-hover-bg: #1d4ed8;
    --button-text: #ffffff;
    --fortune-color: #374151;
    --shadow-color: rgba(31, 41, 55, 0.16);
    --button-shadow: rgba(37, 99, 235, 0.25);
    --button-hover-shadow: rgba(37, 99, 235, 0.38);
    --input-bg: #f8fafc;
    --input-border: rgba(31, 41, 55, 0.18);
    --muted-color: #4b5563;
    --toggle-border: rgba(31, 41, 55, 0.18);
}

body {
    background-color: var(--page-bg);
    color: var(--text-color);
    font-family: 'pretendard', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 32px 16px;
    background-image: var(--page-pattern);
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    width: min(100%, 720px);
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 25px var(--shadow-color);
    transition: background-color 0.3s, box-shadow 0.3s;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
    color: var(--heading-color);
}

.intro-text {
    color: var(--muted-color);
    line-height: 1.6;
    margin: 0 auto 28px;
    max-width: 560px;
}

.theme-toggle {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--toggle-border);
    padding: 10px 16px;
    font-size: 0.95em;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}

.theme-toggle:hover {
    background-color: var(--button-shadow);
}

#fortuneButton,
.upload-button {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 15px 30px;
    font-size: 1.2em;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 10px var(--button-shadow);
}

#fortuneButton:hover,
.upload-button:hover {
    background-color: var(--button-hover-bg);
    box-shadow: 0 6px 15px var(--button-hover-shadow);
}

#fortune {
    margin-top: 30px;
    font-size: 1.5em;
    min-height: 50px;
    color: var(--fortune-color);
}

.classifier-section {
    border-top: 1px solid var(--toggle-border);
    margin-top: 28px;
    padding-top: 28px;
}

.classifier-section h2 {
    color: var(--heading-color);
    font-size: 1.6em;
    margin: 0 0 18px;
}

.upload-panel {
    display: grid;
    gap: 12px;
    justify-items: center;
    margin-bottom: 22px;
}

#imageUpload {
    height: 1px;
    opacity: 0;
    position: absolute;
    width: 1px;
}

.upload-button {
    display: inline-block;
    font-family: inherit;
    font-weight: 700;
}

.status-text {
    color: var(--muted-color);
    font-size: 0.95em;
    margin: 0;
}

.preview-image {
    border: 1px solid var(--input-border);
    border-radius: 8px;
    box-shadow: 0 10px 25px var(--shadow-color);
    display: block;
    max-height: 360px;
    max-width: 100%;
    object-fit: contain;
}

.preview-image {
    display: none;
    margin: 0 auto 24px;
}

.preview-image.is-visible {
    display: block;
}

.result-panel {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    margin-top: 24px;
    padding: 18px;
    text-align: left;
}

.top-prediction {
    color: var(--text-color);
    font-size: 1.2em;
    font-weight: 700;
    margin: 0 0 16px;
    text-align: center;
}

.label-container {
    display: grid;
    gap: 14px;
}

.prediction-meta {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
}

.prediction-bar {
    background-color: var(--toggle-border);
    border-radius: 8px;
    height: 12px;
    overflow: hidden;
}

.prediction-bar span {
    background-color: var(--button-bg);
    display: block;
    height: 100%;
    transition: width 0.2s;
}

.contact-section {
    border-top: 1px solid var(--toggle-border);
    margin-top: 32px;
    padding-top: 28px;
    text-align: left;
}

.contact-section h2 {
    color: var(--heading-color);
    font-size: 1.6em;
    margin: 0 0 18px;
    text-align: center;
}

.contact-form {
    display: grid;
    gap: 10px;
}

.contact-form label {
    font-size: 0.95em;
    font-weight: 700;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    box-sizing: border-box;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    font: inherit;
    padding: 12px 14px;
    transition: background-color 0.3s, border-color 0.3s, color 0.3s;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--button-bg);
    outline: 2px solid var(--button-shadow);
}

.submit-button {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 700;
    margin-top: 8px;
    padding: 14px 20px;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 10px var(--button-shadow);
}

.submit-button:hover {
    background-color: var(--button-hover-bg);
    box-shadow: 0 6px 15px var(--button-hover-shadow);
}

.comments-section {
    border-top: 1px solid var(--toggle-border);
    margin-top: 32px;
    padding-top: 28px;
    text-align: left;
}

.comments-section h2 {
    color: var(--heading-color);
    font-size: 1.6em;
    margin: 0 0 18px;
    text-align: center;
}

#disqus_thread {
    min-height: 220px;
}

.comments-section noscript {
    color: var(--fortune-color);
    display: block;
    line-height: 1.6;
    text-align: center;
}

.comments-section a {
    color: var(--heading-color);
}

@media (max-width: 480px) {
    .container {
        width: min(100% - 32px, 360px);
        padding: 32px 20px;
    }

    h1 {
        font-size: 2em;
    }
}