/* Base Layout matched to reference project */
.grid-nav { display: flex; justify-content: space-between; align-items: center; padding-bottom: 1rem; border-bottom: 1px solid var(--pico-muted-border-color); margin-bottom: 2rem;}
.nav-links { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.5rem; justify-content: center; }

/* Custom Buttons */
.nav-btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 6px;
    color: white !important;
    font-weight: bold;
    text-align: center;
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}
.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

/* Custom Color Palette */
.bg-indigo { background-color: #3f51b5; color: white;}
.bg-teal { background-color: #009688; color: white;}
.bg-orange { background-color: #ff9800; color: white;}
.bg-grey { background-color: #78909c; color: white;}
.bg-dark { background-color: #37474f; color: white; padding: 4px 8px; border-radius: 4px; font-size: 12px;}
.bg-gemini { background-color: #1da1f2; color: white; border: none;}
.bg-openai { background-color: #10a37f; color: white; border: none;}
.bg-deepseek { background-color: #4d61fc; color: white; border: none;}

.bg-gemini:hover, .bg-openai:hover, .bg-deepseek:hover, .bg-grey:hover { opacity: 0.9; }

/* UI Elements */
.category-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.cat-pill {
    background-color: var(--pico-form-element-background-color);
    border: 1px solid var(--pico-form-element-border-color);
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.2s;
}
.cat-pill:hover, .cat-pill.active {
    background-color: var(--pico-primary-background);
    color: var(--pico-primary-inverse);
    border-color: var(--pico-primary-border);
}

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

.prompt-card {
    background-color: var(--pico-card-background-color);
    border: 1px solid var(--pico-muted-border-color);
    padding: 1.25rem;
    border-radius: 8px;
    box-shadow: var(--pico-card-box-shadow);
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.prompt-card:hover {
    transform: translateY(-3px);
    border-color: var(--pico-primary);
}
.prompt-card h4 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}
.prompt-card p {
    font-size: 0.9rem;
    color: var(--pico-muted-color);
    flex-grow: 1;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}
.prompt-card .meta {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--pico-muted-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-copy {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 5px 10px;
    margin: 0;
    width: auto;
    font-size: 0.9rem;
}

.reply-card {
    background-color: var(--pico-card-background-color);
    border: 1px solid var(--pico-muted-border-color);
    border-left: 4px solid var(--pico-primary);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}
.reply-card pre {
    margin-top: 0.5rem;
    margin-bottom: 0;
    white-space: pre-wrap;
    background: transparent;
    padding: 0;
    font-size: 0.9rem;
}
.reply-source {
    font-weight: bold;
    font-size: 0.8rem;
    color: var(--pico-muted-color);
    text-transform: uppercase;
}