:root {
    --background-color: #f0f0f0;
    --text-color: #333;
    --container-bg: #fff;
    --button-bg: #4CAF50;
    --button-text: white;
    --card-bg: #fafafa;
    --card-border: #e0e0e0;
    --category-bg: #e8e8e8;
    --category-active-bg: #4CAF50;
    --category-active-text: white;
    --history-bg: #f5f5f5;
    --subtitle-color: #777;
}

body.dark-mode {
    --background-color: #1a1a2e;
    --text-color: #eee;
    --container-bg: #16213e;
    --button-bg: #e94560;
    --button-text: #fff;
    --card-bg: #0f3460;
    --card-border: #1a1a4e;
    --category-bg: #0f3460;
    --category-active-bg: #e94560;
    --category-active-text: #fff;
    --history-bg: #0f3460;
    --subtitle-color: #aaa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.theme-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
}

#theme-toggle {
    padding: 8px 16px;
    border: 2px solid var(--text-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

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

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    max-width: 500px;
    width: 100%;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

h1 {
    font-size: 2rem;
    margin-bottom: 8px;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.subtitle {
    color: var(--subtitle-color);
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.category-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 24px;
}

.category-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 20px;
    background-color: var(--category-bg);
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.category-btn:hover {
    opacity: 0.8;
}

.category-btn.active {
    background-color: var(--category-active-bg);
    color: var(--category-active-text);
}

#generator-btn {
    padding: 14px 40px;
    font-size: 1.3rem;
    cursor: pointer;
    border-radius: 30px;
    border: none;
    background-color: var(--button-bg);
    color: var(--button-text);
    margin-bottom: 24px;
    transition: all 0.3s ease;
    font-weight: bold;
}

#generator-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

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

.menu-display {
    display: none;
    margin-bottom: 24px;
}

.menu-display.show {
    display: block;
    animation: fadeIn 0.5s ease;
}

.menu-card {
    background-color: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s ease;
}

.menu-emoji {
    font-size: 4rem;
    display: block;
    margin-bottom: 12px;
}

.menu-name {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.menu-category-tag {
    display: inline-block;
    background-color: var(--category-active-bg);
    color: var(--category-active-text);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.menu-desc {
    color: var(--subtitle-color);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Share Buttons */
.share-buttons {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--card-border);
}

.share-label {
    font-size: 0.85rem;
    color: var(--subtitle-color);
    margin-bottom: 10px;
}

.share-btn-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.share-btn {
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    color: #fff;
}

.share-btn:hover {
    transform: scale(1.15);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.share-btn:active {
    transform: scale(0.95);
}

.share-twitter {
    background-color: #000;
}

.share-facebook {
    background-color: #1877F2;
}

.share-naver {
    background-color: #03C75A;
}

.share-copy {
    background-color: #666;
}

body.dark-mode .share-copy {
    background-color: #888;
}

.share-native {
    background-color: var(--button-bg);
    display: none;
}

.share-toast {
    font-size: 0.8rem;
    color: var(--button-bg);
    margin-top: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.share-toast.show {
    opacity: 1;
}

.history {
    display: none;
    text-align: left;
}

.history.show {
    display: block;
}

.history h3 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--subtitle-color);
}

.history ul {
    list-style: none;
    padding: 0;
}

.history li {
    background-color: var(--history-bg);
    padding: 8px 14px;
    border-radius: 8px;
    margin-bottom: 6px;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.spinning .menu-emoji {
    animation: spin 0.5s ease;
}

/* Navigation Styles */
nav {
    width: 100%;
    padding: 10px 0;
    text-align: center;
    margin-bottom: 20px;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--button-bg);
}

/* Header Styles */
header {
    width: 100%;
    max-width: 500px;
}

/* Main Styles */
main {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Aside (Ad) Styles */
aside.ad-container {
    width: 100%;
    max-width: 500px;
}

/* Footer Styles */
footer {
    width: 100%;
    text-align: center;
    margin-top: 40px;
    padding: 20px 0;
    color: var(--subtitle-color);
}