:root {
    --primary-color: #2E7D32; /* Green */
    --secondary-color: #66BB6A; /* Light Green */
    --background-color: #F8F9FA;
    --card-background: #FFFFFF;
    --text-color: #333333;
    --light-text-color: #FFFFFF;
    --border-color: #E0E0E0;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    background-image: url('background.png');
    background-attachment: fixed;
    background-size: cover;
}

#app {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 2rem 1rem;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

header h1 {
    color: var(--primary-color);
    margin: 0;
    font-size: 2.5rem;
}

header p {
    color: var(--text-color);
    font-size: 1.1rem;
}

#recipe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.recipe-card {
    background-color: var(--card-background);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.recipe-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.recipe-card-image {
    width: 100%;
    height: 180px;
    background-size: cover;
    background-position: center;
    background-color: var(--secondary-color);
}

.recipe-card-content {
    padding: 1.5rem;
}

.recipe-card-content h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.25rem;
}

#recipe-detail {
    background-color: var(--card-background);
    padding: 2rem 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    animation: fadeIn 0.5s ease;
}

#recipe-detail h2 {
    color: var(--primary-color);
    text-align: center;
    font-size: 2.2rem;
    margin-top: 0;
}

#recipe-detail h3 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 0.5rem;
    margin-top: 2rem;
}

#recipe-detail ul, #recipe-detail ol {
    padding-left: 20px;
    line-height: 1.8;
}

.back-button {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.3s ease;
    display: block;
    width: fit-content;
    margin: 0 auto 2rem;
}

.back-button:hover {
    background-color: #1B5E20; /* Darker Green */
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem;
    color: #666;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 12px;
    font-size: 0.9rem;
}


@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    #app {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2rem;
    }

    #recipe-detail {
        padding: 1.5rem;
    }

    .back-button {
        width: 100%;
        text-align: center;
    }
}