/* --- Basic Setup & Variables --- */
:root {
    --bg-color: #f4f5f7;
    --text-color: #172b4d;
    --subtle-text: #6b778c;
    --primary-color: #0052cc;
    --border-color: #dfe1e6;
    --card-bg: #ffffff;
    --font-family: 'Inter', sans-serif;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);

    /* --- Categorie Kleurenpalet --- */
    /* Zachte, toegankelijke pastelkleuren voor de achtergronden */
    --color-bg-cat-1: #fd82fd; /* Lesvoorbereiding & Ideeën (Lichtblauw) */
    --color-bg-cat-2: #a7f6f6; /* Lesmateriaal & Opdrachten (Mintgroen) */
    --color-bg-cat-3: #f87177; /* Differentiatie & Personalisatie (Zalmroze) */
    --color-bg-cat-4: #a474e6; /* Beoordeling & Feedback (Lavendel) */
    --color-bg-cat-5: #eebb56; /* Administratie & Communicatie (Lichtgeel) */
    --color-bg-cat-6: #8bf398; /* Verantwoord & Kritisch Gebruik (Lichtgrijs) */
    --color-bg-cat-7: #71a9e5; /* Beeldgeneratie (Lichter Blauw) */
    --color-bg-cat-8: #dde67d; /* Bouw je Eigen Prompt (Indigo-wit) */
    --color-bg-cat-9: #609047; /* Prompts voor Leerlingen (Lichtgroen) */

    /* Accentkleuren voor de borders in het menu en titels op de kaarten */
    --color-accent-cat-1: #172b4d;
    --color-accent-cat-2: #172b4d;
    --color-accent-cat-3: #172b4d;
    --color-accent-cat-4: #172b4d;
    --color-accent-cat-5: #172b4d;
    --color-accent-cat-6: #172b4d;
    --color-accent-cat-7: #172b4d;
    --color-accent-cat-8: #172b4d;
    --color-accent-cat-9: #172b4d;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px;
}

/* --- Left Sidebar & Navigation --- */
.left-sidebar .logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 40px;
    color: var(--text-color);
    padding-left: 15px;
}

.left-sidebar nav a {
    position: relative;
    display: block;
    text-decoration: none;
    color: #434343; /* Donkerder voor beter contrast */
    padding: 12px 20px;
    margin-bottom: 8px;
    font-weight: 500;
    border-radius: 8px;
    border-left: 5px solid transparent; /* Initiele border, wordt later ingekleurd */
    transition: all 0.3s ease;
}

.left-sidebar nav a:hover {
    transform: translateX(5px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.left-sidebar nav a.active {
    font-weight: 700;
    color: #000;
    border-left-width: 8px; /* Maak de border dikker bij selectie */
}

/* --- Main Content --- */
main { min-width: 0; }

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.search-bar {
    flex-grow: 1;
}

.search-bar input {
    width: 100%;
    max-width: 600px;
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-family);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.2);
}

.prompt-counter {
    text-align: right;
    color: var(--subtle-text);
    font-size: 0.9rem;
    margin: 10px 0 0 15px;
    white-space: nowrap;
}

/* --- Prompt Cards & Animations --- */
#prompt-list {
    display: grid;
    gap: 25px;
}

.prompt-card {
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    cursor: pointer;
    border: 1px solid transparent; /* Wordt per categorie ingekleurd */
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.4s ease;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease forwards;
}

.prompt-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.prompt-card.fade-out {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.prompt-card-title {
    margin: 0 0 15px 0;
    font-size: 1.1rem;
    font-weight: 700;
}

.prompt-card-content {
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
    color: #333;
}

.prompt-card mark {
    background-color: rgba(255, 234, 0, 0.5); /* Duidelijkere highlight kleur */
    color: var(--text-color);
    border-radius: 3px;
    padding: 0 2px;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Toast & Back-to-Top --- */
.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-color);
    color: #fff;
    padding: 12px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 1000;
    transition: bottom 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
    font-weight: 500;
}
.toast.show { bottom: 30px; }

#back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    z-index: 999;
}
#back-to-top-btn.visible { opacity: 1; visibility: visible; transform: translateY(0); }
#back-to-top-btn:hover { background-color: #0041a3; }

/*
============================================================
--- HET COMPLETE KLEURENSYSTEEM ---
============================================================
*/

/* --- 1. Lesvoorbereiding & Ideeën --- */
.slug--lesvoorbereiding-en-ideen { background-color: var(--color-bg-cat-1); border-left-color: var(--color-accent-cat-1); }
.prompt-card.slug--lesvoorbereiding-en-ideen { background-color: var(--color-bg-cat-1); border-color: #bee5fd; }
.prompt-card.slug--lesvoorbereiding-en-ideen .prompt-card-title { color: var(--color-accent-cat-1); }

/* --- 2. Lesmateriaal & Opdrachten --- */
.slug--lesmateriaal-en-opdrachten { background-color: var(--color-bg-cat-2); border-left-color: var(--color-accent-cat-2); }
.prompt-card.slug--lesmateriaal-en-opdrachten { background-color: var(--color-bg-cat-2); border-color: #b5f5ec; }
.prompt-card.slug--lesmateriaal-en-opdrachten .prompt-card-title { color: var(--color-accent-cat-2); }

/* --- 3. Differentiatie & Personalisatie --- */
.slug--differentiatie-en-personalisatie { background-color: var(--color-bg-cat-3); border-left-color: var(--color-accent-cat-3); }
.prompt-card.slug--differentiatie-en-personalisatie { background-color: var(--color-bg-cat-3); border-color: #ffd6e7; }
.prompt-card.slug--differentiatie-en-personalisatie .prompt-card-title { color: var(--color-accent-cat-3); }

/* --- 4. Beoordeling & Feedback --- */
.slug--beoordeling-en-feedback { background-color: var(--color-bg-cat-4); border-left-color: var(--color-accent-cat-4); }
.prompt-card.slug--beoordeling-en-feedback { background-color: var(--color-bg-cat-4); border-color: #d3adf7; }
.prompt-card.slug--beoordeling-en-feedback .prompt-card-title { color: var(--color-accent-cat-4); }

/* --- 5. Administratie & Communicatie --- */
.slug--administratie-en-communicatie { background-color: var(--color-bg-cat-5); border-left-color: var(--color-accent-cat-5); }
.prompt-card.slug--administratie-en-communicatie { background-color: var(--color-bg-cat-5); border-color: #ffe58f; }
.prompt-card.slug--administratie-en-communicatie .prompt-card-title { color: var(--color-accent-cat-5); }

/* --- 6. Verantwoord & Kritisch Gebruik --- */
.slug--verantwoord-en-kritisch-gebruik { background-color: var(--color-bg-cat-6); border-left-color: var(--color-accent-cat-6); }
.prompt-card.slug--verantwoord-en-kritisch-gebruik { background-color: var(--color-bg-cat-6); border-color: #d9d9d9; }
.prompt-card.slug--verantwoord-en-kritisch-gebruik .prompt-card-title { color: var(--color-accent-cat-6); }

/* --- 7. Beeldgeneratie (Interactief) --- */
.slug--beeldgeneratie-interactief { background-color: var(--color-bg-cat-7); border-left-color: var(--color-accent-cat-7); }
.prompt-card.slug--beeldgeneratie-interactief { background-color: var(--color-bg-cat-7); border-color: #bae7ff; }
.prompt-card.slug--beeldgeneratie-interactief .prompt-card-title { color: var(--color-accent-cat-7); }

/* --- 8. Bouw je Eigen Prompt --- */
.slug--bouw-je-eigen-prompt { background-color: var(--color-bg-cat-8); border-left-color: var(--color-accent-cat-8); }
.prompt-card.slug--bouw-je-eigen-prompt { background-color: var(--color-bg-cat-8); border-color: #d6e4ff; }
.prompt-card.slug--bouw-je-eigen-prompt .prompt-card-title { color: var(--color-accent-cat-8); }

/* --- 9. Prompts voor Leerlingen --- */
.slug--prompts-voor-leerlingen { background-color: var(--color-bg-cat-9); border-left-color: var(--color-accent-cat-9); }
.prompt-card.slug--prompts-voor-leerlingen { background-color: var(--color-bg-cat-9); border-color: #d9f7be; }
.prompt-card.slug--prompts-voor-leerlingen .prompt-card-title { color: var(--color-accent-cat-9); }