/* --- UPDATED BRAND VARIABLES --- */
:root {
    --gh-blue: #0366d6;
    --gh-green: #238636;        /* Mat's Robot Green */
    --gh-green-hover: #2ea44f;
    --gh-border: #eaecef;
    --gh-bg-gray: #f6f8fa;
    --gh-dark: #24292e;         /* Primary Text Color */
    --gh-text-muted: #586069;   /* Gray Text */
    --note-bg: #fffbdd;         /* Mat's Robot Yellow Note */
    --note-border: #d4a017;     /* Mat's Robot Gold Border */
}

/* --- MAIN LAYOUT --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    color: var(--gh-dark);      
    line-height: 1.5;
    margin: 0;
    padding: 0;                 
    background-color: #ffffff;
}

/* --- BRANDED NOTE BOX --- */
.note {
    background-color: var(--note-bg) !important;
    padding: 1.1rem;
    border-left: 5px solid var(--note-border) !important;
    margin: 1.5rem auto;
    border-radius: 4px;
    color: var(--gh-dark);
    font-size: 0.95rem;
    max-width: 950px;
    text-align: left;
    box-sizing: border-box;
}

.note strong {
    color: var(--gh-dark);
}

/* --- UPDATED HEADER --- */
.main-header {
    max-width: 950px;
    margin: 2.5rem auto;
    padding: 0 2rem;
    text-align: center;
}

.main-header h1 {
    font-size: 2.2rem;
    color: var(--gh-dark);
    margin: 0 0 0.2rem 0;
    font-weight: 600;
}

.main-header p {
    color: var(--gh-blue);      
    font-size: 1.1rem;
    font-weight: 500;
    margin-top: 0;
}

/* --- SEARCH SECTION --- */
.search-section {
    max-width: 950px;
    margin: 0 auto 2rem auto;
    padding: 0 2rem;
    display: flex;
    justify-content: center;
}

.search-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    fill: #586069;
    z-index: 1;
}

#part-search {
    width: 100%;
    padding: 10px 12px 10px 35px;
    font-size: 1rem;
    border: 1px solid var(--gh-border);
    border-radius: 6px;
    background-color: var(--gh-bg-gray);
    box-shadow: inset 0 1px 2px rgba(27,31,35,0.075);
    transition: all 0.2s;
}

#part-search:focus {
    outline: none;
    background-color: #fff;
    border-color: var(--gh-blue);
    box-shadow: 0 0 0 3px rgba(3,102,214,0.3);
}

/* --- GLOBAL BUTTON STYLES --- */
.btn-download {
    display: inline-block; 
    background-color: var(--gh-green) !important;
    color: #ffffff !important;
    padding: 6px 15px; 
    text-decoration: none !important;
    border-radius: 4px; 
    font-weight: 600;
    font-size: 0.75rem; 
    text-align: center;
    border: 1px solid rgba(27, 31, 35, 0.15);
    transition: background-color 0.2s;
    cursor: pointer;
}

.btn-download:hover {
    background-color: var(--gh-green-hover) !important;
}

.btn-external {
    background-color: var(--gh-blue) !important;
}
.external-libraries {
    max-width: 950px;
    margin: 0 auto 1.5rem auto;
    padding: 0 2rem;
    font-size: 0.9rem;
    color: var(--gh-text-muted);
}

.library-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.lib-link {
    display: inline-block;
    padding: 5px 12px;
    border: 1px solid var(--gh-border);
    border-radius: 20px; /* Gives it a pill shape */
    text-decoration: none;
    color: var(--gh-blue);
    background-color: var(--gh-bg-gray);
    font-weight: 500;
    transition: all 0.2s;
}

.lib-link:hover {
    background-color: #fff;
    border-color: var(--gh-blue);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* --- THE GRID CONTAINER --- */
#catalogue-container {
    display: flex;
    flex-direction: column; 
    gap: 0.75rem;           
    max-width: 950px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- DESKTOP VIEW (Horizontal List Layout) --- */
@media (min-width: 601px) {
    .catalogue-card {
        display: grid;
        grid-template-columns: 150px 240px 1fr; 
        align-items: center;
        border: 1px solid var(--gh-border);
        border-radius: 6px;
        background: #fff;
        padding: 15px; 
        gap: 25px;
    }

    .card-image {
        border-right: 1px solid var(--gh-border);
        padding-right: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100%;
    }

    .card-image img {
        max-width: 100%;
        max-height: 80px;
        object-fit: contain;
    }

    .title-section {
        grid-column: 2;
        display: flex;
        flex-direction: column;
        align-items: center;    
        text-align: center;     
        gap: 10px;              
        min-width: 240px;       
    }

    .card-content h3 {
        margin: 0;
        font-size: 1.1rem;
        color: var(--gh-blue) !important;
    }

    .source-credit {
        margin: 0;
        font-size: 0.8rem;
        color: var(--gh-text-muted);
    }

    .btn-download {
        align-self: center; 
        min-width: 160px;       
    }

    .description-text {
        grid-column: 3;
        margin: 0;
        padding-left: 20px;
        border-left: 1px solid var(--gh-border);
        font-size: 0.9rem; 
        color: var(--gh-text-muted);
        line-height: 1.5;
    }

    .card-content {
        display: contents;
    }
}

/* --- MOBILE VIEW (Re-ordered Sequence) --- */
@media (max-width: 600px) {
    #catalogue-container {
        display: flex;
        flex-direction: column;
        gap: 1.5rem; 
        padding: 0 1rem;
    }

    .catalogue-card {
        display: flex;
        flex-direction: column;
        padding: 1.25rem;
        border: 1px solid var(--gh-border); /* Keep the border for definition */
        border-radius: 8px;
        background-color: #fafbfc; /* Keep the subtle background tint */
        text-align: center; 
    }

    /* "Unwrap" these so children can move independently */
    .card-content, 
    .title-section {
        display: contents; 
    }
    
    /* 1. TITLE AT TOP */
    .catalogue-card h3 {
        order: 1;
        margin: 0 0 0.5rem 0;
        font-size: 1.3rem;
        color: var(--gh-blue) !important;
    }

    /* 2. IMAGE BELOW TITLE */
    .card-image {
        order: 2;
        margin: 0 0 1rem 0;
        border: none;
        padding: 0;
    }

    .card-image img {
        max-width: 80%;
        max-height: 160px;
        object-fit: contain;
    }

    /* 3. DOWNLOAD BUTTON BELOW IMAGE */
    .btn-download {
        order: 3;
        width: 80%;
        margin: 0 auto 1rem auto;
    }

    /* 4. SOURCE BELOW DOWNLOAD */
    .source-credit {
        order: 4;
        margin-bottom: 0.5rem;
        font-size: 0.85rem;
        display: block; /* Ensure it takes its own line */
    }

    /* 5. DESCRIPTION AT BOTTOM */
    .description-text {
        order: 5;
        margin: 0;
        font-size: 0.9rem;
        line-height: 1.4;
        border: none; /* Ensure vertical line is gone on mobile */
        padding: 0;
    }
}

/* --- FOOTER --- */
footer {
    margin-top: 4rem;
    background-color: var(--gh-bg-gray);
    border-top: 1px solid var(--gh-border);
    padding: 3rem 1rem;
    text-align: center;
    color: var(--gh-text-muted);
    font-size: 0.9rem;
}