:root {
    --bg-color: #fff8e1; /* Light Creamy Yellow */
    --primary-color: #ff8a65; /* Deep Orange */
    --secondary-color: #ffd54f; /* Amber */
    --text-color: #4e342e; /* Brownish Gray */
    --card-bg: #ffffff;
    --font-title: 'Do Hyeon', sans-serif;
    --font-body: 'Nanum Pen Script', cursive;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
}

.container {
    width: 90%;
    max-width: 500px;
    padding: 2rem;
}

header {
    margin-bottom: 2rem;
}

h1 {
    font-family: var(--font-title);
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.8rem;
    font-weight: bold;
}

.category-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.category-btn {
    font-family: var(--font-title);
    font-size: 1rem;
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--secondary-color);
    border-radius: 25px;
    background-color: #fff;
    color: var(--secondary-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.category-btn:hover {
    background-color: var(--secondary-color);
    color: #fff;
}

.category-btn.active {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.menu-card-container {
    perspective: 1000px;
    margin-bottom: 2rem;
}

.menu-card {
    width: 280px;
    height: 280px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin: 0 auto;
}

.menu-card.flipped {
    transform: rotateY(180deg);
}

.card-inner {
    position: absolute;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.card-front {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: #fff;
}

.placeholder {
    font-family: var(--font-title);
    font-size: 8rem;
}

.card-back {
    background-color: var(--card-bg);
    transform: rotateY(180deg);
}

#menu-name {
    font-family: var(--font-title);
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

#menu-category {
    font-size: 1.5rem;
    font-weight: bold;
    background-color: var(--secondary-color);
    color: #fff;
    padding: 0.3rem 1rem;
    border-radius: 15px;
}

#recommend-btn {
    font-family: var(--font-title);
    font-size: 1.5rem;
    padding: 1rem 3rem;
    border: none;
    border-radius: 30px;
    background-color: var(--primary-color);
    color: #fff;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

#recommend-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}