/*
 * =====================================================
 * WISKUNDE.NET - D-TOETSEN
 * Bestand: /stylesheets/d-toetsen/d-toetsen.css
 *
 * Responsive desktop / tablet / mobiel
 *
 * NIEUW:
 * - Grijze disabled knop voor lege toetsen
 * - Binnenkort beschikbaar
 * - Niet aanklikbaar
 * =====================================================
 */

#dt-overzicht {
    --dt-blue: #1685d9;
    --dt-blue-dark: #1268ae;
    --dt-navy: #173453;
    --dt-orange: #ff7929;
    --dt-text: #24374e;
    --dt-muted: #6d7e91;
    --dt-border: #dce8f3;
    --dt-soft: #f3f9fe;

    max-width: 1140px;
    margin: 22px auto 55px;
    padding: 0 12px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    color: var(--dt-text);
    box-sizing: border-box;
}

#dt-overzicht *,
#dt-overzicht *::before,
#dt-overzicht *::after {
    box-sizing: border-box;
}

#dt-overzicht [hidden] {
    display: none !important;
}

/* ==========================================
   INTRODUCTIE
   ========================================== */

#dt-overzicht .dt-intro {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 22px 25px;
    background: linear-gradient(110deg, #eef8ff, #f8fcff);
    border: 1px solid #d5e9f8;
    border-left: 5px solid var(--dt-orange);
    border-radius: 13px;
}

#dt-overzicht .dt-intro-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 53px;
    height: 53px;
    min-width: 53px;
    background: #fff;
    border: 1px solid #d8eafb;
    border-radius: 13px;
    color: var(--dt-blue);
}

#dt-overzicht .dt-intro-icon svg {
    width: 29px;
    height: 29px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

#dt-overzicht .dt-intro-text {
    flex: 1;
    min-width: 0;
}

#dt-overzicht .dt-intro-title {
    margin: 0 0 6px;
    color: var(--dt-navy);
    font-size: 19px;
    font-weight: 700;
    line-height: 1.3;
}

#dt-overzicht .dt-intro p {
    margin: 0;
    font-size: 13px;
    color: #54718b;
    line-height: 1.7;
}

/* ==========================================
   NIVEAUKEUZE
   ========================================== */

#dt-overzicht .dt-section-label {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 25px 0 13px;
    font-size: 12px;
    font-weight: 700;
    color: #75869a;
    letter-spacing: .45px;
    text-transform: uppercase;
}

#dt-overzicht .dt-section-label::before {
    content: "";
    width: 4px;
    height: 15px;
    border-radius: 3px;
    background: var(--dt-orange);
}

/* ==========================================
   NIVEAU-TABBLADEN
   ========================================== */

#dt-overzicht .dt-tabs {
    display: grid;
    grid-template-columns: repeat(8, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 23px;
}

#dt-overzicht .dt-tab {
    appearance: none;
    border: 1px solid var(--dt-border);
    background: #fff;
    border-radius: 10px;
    padding: 15px 5px;
    color: var(--dt-navy);
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.3;
    text-align: center;
    cursor: pointer;
    transition: background .18s, border-color .18s,
                color .18s, box-shadow .18s;
}

#dt-overzicht .dt-tab:hover {
    background: #edf8ff;
    border-color: #8dcaf5;
}

#dt-overzicht .dt-tab.active {
    position: relative;
    color: #fff;
    background: var(--dt-blue);
    border-color: var(--dt-blue);
    box-shadow: 0 3px 10px rgba(22, 133, 217, .17);
}

#dt-overzicht .dt-tab.active::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: calc(50% - 5px);
    width: 10px;
    height: 10px;
    background: var(--dt-blue);
    transform: rotate(45deg);
}

/* ==========================================
   EDITIEKNOPPEN 12 / 13
   ========================================== */

#dt-overzicht .dt-editions {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    background: #f5f9fd;
    border: 1px solid var(--dt-border);
    border-radius: 11px;
    padding: 14px 18px;
    margin: 0 0 23px;
}

#dt-overzicht .dt-edition-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--dt-navy);
}

#dt-overzicht .dt-edition-buttons {
    display: flex;
    gap: 8px;
}

#dt-overzicht .dt-edition {
    appearance: none;
    border: 1px solid #d5e3f0;
    background: #fff;
    border-radius: 8px;
    padding: 10px 20px;
    color: var(--dt-navy);
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: background .2s, color .2s;
}

#dt-overzicht .dt-edition:hover {
    background: #e8f4fe;
}

#dt-overzicht .dt-edition.active {
    background: var(--dt-navy);
    color: #fff;
    border-color: var(--dt-navy);
}

/* ==========================================
   LIJSTTITEL
   ========================================== */

#dt-overzicht .dt-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 1px solid #e1eaf2;
    padding-bottom: 14px;
    margin-bottom: 14px;
}

#dt-overzicht .dt-list-title {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

#dt-overzicht .dt-list-title::before {
    content: "";
    width: 4px;
    height: 28px;
    flex: 0 0 4px;
    border-radius: 3px;
    background: var(--dt-orange);
}

#dt-overzicht .dt-list-title h2 {
    margin: 0;
    font-size: 22px;
    color: var(--dt-navy);
    font-weight: 700;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

/* ==========================================
   AANTAL TOETSEN
   ========================================== */

#dt-overzicht .dt-count {
    display: inline-block;
    flex: 0 0 auto;
    background: #edf6fe;
    border-radius: 30px;
    color: var(--dt-blue-dark);
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

/* ==========================================
   TOETSENLIJST
   ========================================== */

#dt-overzicht .dt-list {
    display: grid;
    gap: 10px;
}

#dt-overzicht .dt-item {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    background: #fff;
    border: 1px solid #e1e9f1;
    border-radius: 12px;
    padding: 14px 17px;
    transition: border-color .2s, background .2s,
                box-shadow .2s;
}

#dt-overzicht .dt-item:hover {
    border-color: #acd5f3;
    background: #fcfeff;
    box-shadow: 0 4px 16px rgba(20, 85, 140, .065);
}

#dt-overzicht .dt-item-number {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    border-radius: 11px;
    background: #eaf6ff;
    color: var(--dt-blue-dark);
    font-size: 18px;
    font-weight: 700;
}

#dt-overzicht .dt-item-content {
    flex: 1 1 auto;
    min-width: 0;
}

#dt-overzicht .dt-item h3 {
    margin: 0 0 7px;
    color: var(--dt-navy);
    font-size: 15px;
    line-height: 1.4;
    font-weight: 700;
    overflow-wrap: anywhere;
}

#dt-overzicht .dt-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 12px;
    line-height: 1.5;
    color: var(--dt-muted);
    overflow-wrap: anywhere;
}

#dt-overzicht .dt-meta-page {
    display: inline-block;
    background: #f2f6fa;
    padding: 5px 9px;
    border-radius: 6px;
}

/* ==========================================
   BLAUWE KNOP - BEKIJK UITWERKING
   ========================================== */

#dt-overzicht .dt-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    flex: 0 0 auto;
    width: auto;
    padding: 11px 16px;
    background: var(--dt-blue);
    border: 1px solid var(--dt-blue);
    color: #fff;
    border-radius: 8px;
    font-family: inherit;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.3;
    text-decoration: none;
    white-space: nowrap;
    transition: background .2s, border-color .2s;
}

#dt-overzicht .dt-link:hover {
    background: var(--dt-blue-dark);
    border-color: var(--dt-blue-dark);
    color: #fff;
    text-decoration: none;
}

/* ==========================================
   NIEUW: GRIJZE KNOP - BINNENKORT BESCHIKBAAR
   ========================================== */

/*
 * Gebruik in JavaScript:
 *
 * <button type="button"
 *         class="dt-link dt-link-disabled"
 *         disabled>
 *     Binnenkort beschikbaar
 * </button>
 *
 * De knop is volledig uitgeschakeld.
 */

#dt-overzicht .dt-link-disabled,
#dt-overzicht .dt-link-disabled:hover,
#dt-overzicht .dt-link-disabled:focus,
#dt-overzicht .dt-link:disabled,
#dt-overzicht .dt-link:disabled:hover,
#dt-overzicht .dt-link[aria-disabled="true"],
#dt-overzicht .dt-link[aria-disabled="true"]:hover {
    background: #eef2f6;
    border-color: #dbe4ed;
    color: #7a8a9a;
    text-decoration: none;
    box-shadow: none;
    cursor: not-allowed;
    opacity: 1;
}

/*
 * Voorkomt muisinteractie met een uitgeschakelde
 * knop of een link die expliciet disabled is.
 *
 * De echte disabled-attribuut op een button is
 * nodig om ook toetsenbordactivatie te blokkeren.
 */

#dt-overzicht .dt-link:disabled,
#dt-overzicht .dt-link-disabled:disabled,
#dt-overzicht .dt-link[aria-disabled="true"] {
    pointer-events: none;
}

/* ==========================================
   GEEN TOETSEN BESCHIKBAAR
   ========================================== */

#dt-overzicht .dt-empty {
    padding: 25px;
    background: var(--dt-soft);
    border: 1px dashed #bbd7ec;
    border-radius: 11px;
    color: var(--dt-muted);
    text-align: center;
    line-height: 1.6;
}

/* ==========================================
   TOEGANKELIJKHEID
   ========================================== */

#dt-overzicht button:focus-visible,
#dt-overzicht a:focus-visible {
    outline: 3px solid var(--dt-orange);
    outline-offset: 3px;
}

/* ==========================================
   TABLET
   ========================================== */

@media (max-width: 850px) {

    #dt-overzicht .dt-tabs {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

}

/* ==========================================
   MOBIEL
   ========================================== */

@media (max-width: 600px) {

    #dt-overzicht {
        width: 100%;
        max-width: 100%;
        padding: 0 10px;
        margin: 15px auto 40px;
    }

    #dt-overzicht .dt-intro {
        padding: 16px;
        gap: 12px;
    }

    #dt-overzicht .dt-intro-icon {
        width: 42px;
        height: 42px;
        min-width: 42px;
    }

    #dt-overzicht .dt-intro-icon svg {
        width: 23px;
        height: 23px;
    }

    #dt-overzicht .dt-intro-title {
        font-size: 16px;
    }

    #dt-overzicht .dt-intro p {
        font-size: 12px;
        line-height: 1.5;
    }

    /* Niveau-tabbladen: 2 per rij */

    #dt-overzicht .dt-tabs {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        margin-bottom: 18px;
    }

    #dt-overzicht .dt-tab {
        padding: 13px 7px;
        font-size: 13px;
    }

    /* Editiekeuze */

    #dt-overzicht .dt-editions {
        align-items: stretch;
        flex-direction: column;
        gap: 12px;
        padding: 14px;
    }

    #dt-overzicht .dt-edition-buttons {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    #dt-overzicht .dt-edition {
        padding: 11px 8px;
        text-align: center;
    }

    /* Titel */

    #dt-overzicht .dt-list-title h2 {
        font-size: 17px;
        line-height: 1.65;
    }

    #dt-overzicht .dt-count {
        font-size: 11px;
        padding: 7px 9px;
    }

    /* Toetskaarten: horizontaal houden */

    #dt-overzicht .dt-item {
        flex-wrap: nowrap;
        align-items: center;
        gap: 9px;
        padding: 12px 10px;
        min-width: 0;
    }

    #dt-overzicht .dt-item-number {
        flex: 0 0 36px;
        width: 36px;
        height: 36px;
        border-radius: 9px;
        font-size: 15px;
    }

    #dt-overzicht .dt-item-content {
        flex: 1 1 auto;
        min-width: 0;
    }

    #dt-overzicht .dt-item h3 {
        font-size: 13px;
        line-height: 1.35;
        margin-bottom: 4px;
    }

    #dt-overzicht .dt-meta {
        font-size: 11px;
        line-height: 1.4;
    }

    /* Blauwe en grijze knoppen compact */

    #dt-overzicht .dt-link {
        width: auto;
        max-width: none;
        flex: 0 0 auto;
        padding: 9px 10px;
        font-size: 11px;
        line-height: 1.25;
        border-radius: 7px;
        gap: 5px;
        white-space: nowrap;
        text-align: center;
    }

}

/* ==========================================
   EXTRA SMALLE MOBIELE SCHERMEN
   ========================================== */

@media (max-width: 360px) {

    #dt-overzicht .dt-item {
        gap: 7px;
        padding: 10px 8px;
    }

    #dt-overzicht .dt-item-number {
        flex-basis: 31px;
        width: 31px;
        height: 34px;
        font-size: 13px;
    }

    #dt-overzicht .dt-item h3 {
        font-size: 12px;
    }

    #dt-overzicht .dt-meta {
        font-size: 10px;
    }

    #dt-overzicht .dt-link {
        padding: 8px 7px;
        font-size: 10px;
        gap: 3px;
    }

}

/* ==========================================
   MINDER ANIMATIES
   ========================================== */

@media (prefers-reduced-motion: reduce) {

    #dt-overzicht *,
    #dt-overzicht *::before,
    #dt-overzicht *::after {
        transition: none !important;
    }

}