:root {
    --bg-color: #f0f0f0;
    --container-bg: #fff;
    --text-color: #333;
    --accent-color: #ff6b6b;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --btn-bg: #ff6b6b;
    --btn-hover: #fa5252;
    --btn-text: white;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #ff8787;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, "Helvetica Neue", "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 25px var(--shadow-color);
    text-align: center;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    max-width: 400px;
    width: 90%;
}

h1 {
    margin-bottom: 30px;
    color: var(--text-color);
    font-size: 2rem;
}

.menu-container {
    margin-bottom: 40px;
    min-height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#menu-text {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin: 0;
    word-break: keep-all;
    animation: fadeIn 0.5s ease-in-out;
}

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

#generate-btn {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    transition: transform 0.2s ease, background-color 0.3s ease;
    width: 100%;
}

#generate-btn:hover {
    background-color: var(--btn-hover);
    transform: translateY(-2px);
}

#generate-btn:active {
    transform: translateY(0);
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
    padding: 5px;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

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