:root {
    --primary-color: #ff6b6b;
    --secondary-color: #feca57;
    --background-color: #fff9f0;
    --text-color: #333;
    --container-bg: #fff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    --primary-color: #ff8787;
    --secondary-color: #ffd43b;
    --background-color: #1a1a2e;
    --text-color: #f0f0f0;
    --container-bg: #16213e;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: var(--container-bg);
    color: var(--text-color);
    font-size: 1.5em;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: all var(--transition-speed) ease;
    z-index: 1000;
}

#theme-toggle:hover {
    transform: scale(1.1);
}

.lang-switch {
    position: fixed;
    top: 20px;
    left: 20px;
    padding: 12px 20px;
    border-radius: 25px;
    background: var(--container-bg);
    color: var(--text-color);
    text-decoration: none;
    font-weight: bold;
    font-size: 0.95em;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: all var(--transition-speed) ease;
    z-index: 1000;
}

.lang-switch:hover {
    transform: scale(1.05);
}

body {
    font-family: 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.container {
    text-align: center;
    background: var(--container-bg);
    padding: 50px 60px;
    border-radius: 24px;
    box-shadow: 0 15px 35px var(--shadow-color);
    transition: transform var(--transition-speed) ease, background var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    max-width: 500px;
    width: 90%;
}

.container:hover {
    transform: translateY(-5px);
}

h1 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 2.2em;
    font-weight: bold;
}

.subtitle {
    color: var(--text-color);
    opacity: 0.7;
    margin-bottom: 30px;
    font-size: 1.1em;
}

.menu-container {
    min-height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 30px;
}

.menu-item {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 25px 40px;
    border-radius: 16px;
    font-size: 1.8em;
    font-weight: bold;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.3);
    animation: bounce-in 0.6s ease-out forwards;
    opacity: 0;
}

.menu-emoji {
    font-size: 3em;
    margin-bottom: 15px;
    animation: spin-in 0.8s ease-out forwards;
}

@keyframes bounce-in {
    0% {
        transform: scale(0.3) translateY(50px);
        opacity: 0;
    }
    50% {
        transform: scale(1.1) translateY(-10px);
    }
    100% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

@keyframes spin-in {
    0% {
        transform: rotate(-180deg) scale(0);
        opacity: 0;
    }
    100% {
        transform: rotate(0deg) scale(1);
        opacity: 1;
    }
}

#recommend-btn {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 18px 40px;
    font-size: 1.3em;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(255, 107, 107, 0.4);
}

#recommend-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 30px rgba(255, 107, 107, 0.5);
}

#recommend-btn:active {
    transform: translateY(1px);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}