:root {
    /* OKLCH Color Palette for Vibrant Feel */
    --primary-bg: oklch(0.1 0.05 240);
    --card-bg: oklch(0.2 0.05 240 / 0.8);
    --accent: oklch(0.7 0.25 150);
    --glow: oklch(0.7 0.25 150 / 0.4);
    --text-main: oklch(0.95 0.02 240);
    --text-sub: oklch(0.75 0.02 240);
    --white: #ffffff;
    
    --radius: 24px;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Pretendard', sans-serif;
}

body {
    background-color: var(--primary-bg);
    background-image: radial-gradient(circle at 50% 50%, oklch(0.15 0.05 240) 0%, var(--primary-bg) 100%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

.app-container {
    width: 90%;
    max-width: 500px;
    padding: 40px 0;
    text-align: center;
    container-type: inline-size;
}

/* Hero Section */
header {
    margin-bottom: 40px;
}

.hero-text {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--white), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-sub);
    font-weight: 400;
}

/* Recommender Card */
.recommender-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 50px 30px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 20px var(--glow);
    margin-bottom: 40px;
    transition: var(--transition);
}

.recommender-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.menu-display {
    margin-bottom: 40px;
}

.emoji {
    font-size: 5rem;
    display: block;
    margin-bottom: 10px;
    filter: drop-shadow(0 10px 10px rgba(0,0,0,0.3));
    transition: transform 0.5s ease;
}

.food-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
}

/* Button with Glow Effect */
.glow-button {
    background: var(--accent);
    color: oklch(0.1 0.05 240);
    border: none;
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 16px;
    cursor: pointer;
    box-shadow: 0 10px 20px var(--glow);
    transition: var(--transition);
    width: 100%;
}

.glow-button:active {
    transform: scale(0.95);
    box-shadow: 0 5px 10px var(--glow);
}

.glow-button:hover {
    background: oklch(0.75 0.25 150);
    box-shadow: 0 15px 30px var(--glow);
}

/* History List */
.recent-list {
    text-align: left;
    margin-top: 20px;
}

.recent-list h3 {
    font-size: 0.9rem;
    color: var(--text-sub);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 15px;
    padding-left: 10px;
}

#history-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.history-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 16px;
    border-radius: 12px;
    font-size: 0.85rem;
    color: var(--text-sub);
    animation: fadeIn 0.5s ease;
}

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

footer {
    margin-top: 40px;
    font-size: 0.8rem;
    color: var(--text-sub);
    opacity: 0.6;
}

/* Responsive with Container Queries */
@container (max-width: 400px) {
    .hero-text { font-size: 2rem; }
    .recommender-card { padding: 30px 20px; }
}