.ketelkiezer {
    width: 100%;
    padding: 50px 20px 80px;
}

.ketelkiezer-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}


/* ==========================
   HEADER
   ========================== */

.ketelkiezer-header {
    text-align: center;
    margin-bottom: 40px;
}

.ketelkiezer-label {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.ketelkiezer-header h1 {
    margin: 0 0 15px;
    font-size: 38px;
}

.ketelkiezer-header p {
    max-width: 650px;
    margin: 0 auto;
    color: #666;
    line-height: 1.6;
}


/* ==========================
   PROGRESS
   ========================== */

.ketelkiezer-progress {
    margin-bottom: 45px;
}

.ketelkiezer-progress-bar {
    width: 100%;
    height: 5px;
    background: #eeeeee;
    overflow: hidden;
}

    .ketelkiezer-progress-bar div {
        height: 100%;
        width: 20%;
        background: #c00000;
        transition: width .35s ease;
    }

.ketelkiezer-progress-text {
    margin-top: 10px;
    text-align: right;
    font-size: 13px;
    color: #777;
}


/* ==========================
   QUESTIONS
   ========================== */

.ketel-vraag {
    display: none;
}

    .ketel-vraag.active {
        display: block;
        animation: ketelFadeIn .25s ease;
    }

@keyframes ketelFadeIn {
    from {
        opacity: 0;
        transform: translateX(15px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.ketel-vraag h2 {
    text-align: center;
    font-size: 30px;
    margin: 0 0 10px;
}

.ketel-vraag-subtitle {
    text-align: center;
    color: #777;
    margin: 0 0 35px;
}


/* ==========================
   OPTIONS
   ========================== */

.ketel-opties {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.ketel-optie {
    appearance: none;
    border: 1px solid #ddd;
    background: #fff;
    min-height: 85px;
    padding: 18px 20px;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}

    .ketel-optie:hover {
        background-color: #f0f0f0;
        border-color: #ccc;
        transform: translateY(-2px);
    }

    .ketel-optie:active {
        transform: translateY(0);
    }

.ketel-optie-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.ketel-optie-content {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.ketel-optie strong {
    font-size: 17px;
}

.ketel-optie small {
    color: #777;
    line-height: 1.4;
}


/* ==========================
   PERSONEN
   ========================== */

.ketel-opties-small {
    grid-template-columns: repeat(5, 1fr);
}

.ketel-optie-number {
    min-height: 130px;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

    .ketel-optie-number strong {
        font-size: 35px;
    }


/* ==========================
   NAVIGATION
   ========================== */

.ketelkiezer-navigation {
    margin-top: 35px;
    display: flex;
    justify-content: space-between;
}

.ketel-nav-back {
    border: none;
    background: none;
    padding: 10px 0;
    cursor: pointer;
    font-size: 15px;
}

    .ketel-nav-back:hover {
        text-decoration: underline;
    }


/* ==========================
   MOBILE
   ========================== */

@media (max-width: 700px) {

    .ketelkiezer {
        padding: 30px 15px 50px;
    }

    .ketelkiezer-header {
        margin-bottom: 30px;
    }

        .ketelkiezer-header h1 {
            font-size: 29px;
        }

        .ketelkiezer-header p {
            font-size: 15px;
        }

    .ketelkiezer-progress {
        margin-bottom: 35px;
    }

    .ketel-vraag h2 {
        font-size: 25px;
    }

    .ketel-vraag-subtitle {
        font-size: 14px;
        margin-bottom: 25px;
    }

    .ketel-opties {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .ketel-opties-small {
        grid-template-columns: repeat(3, 1fr);
    }

    .ketel-optie {
        min-height: 72px;
        padding: 15px;
    }

    .ketel-optie-number {
        min-height: 100px;
    }

        .ketel-optie-number strong {
            font-size: 30px;
        }
}


@media (max-width: 400px) {

    .ketel-opties-small {
        grid-template-columns: repeat(2, 1fr);
    }

    .ketelkiezer-header h1 {
        font-size: 26px;
    }

    .ketel-vraag h2 {
        font-size: 23px;
    }
}


/* ==========================
   RESULTATEN
   ========================== */

.ketel-resultaten {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.ketel-resultaat {
    position: relative;
    background: #fff;
    border: 1px solid #ddd;
    padding: 30px;
}

.ketel-resultaat-beste {
    border: 2px solid #222;
}

.ketel-resultaat-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
    margin-bottom: 20px;
}

.ketel-resultaat-content {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
    align-items: center;
}

.ketel-resultaat-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

    .ketel-resultaat-image img {
        width: 100%;
        max-width: 220px;
        height: 220px;
        object-fit: contain;
    }

.ketel-resultaat-merk {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.ketel-resultaat-info h2 {
    margin: 5px 0 15px;
    font-size: 28px;
}

.ketel-resultaat-specificaties {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

    .ketel-resultaat-specificaties span {
        background: #f0f0f0;
        padding: 6px 10px;
        font-size: 13px;
    }

.ketel-resultaat-info p {
    color: #666;
    line-height: 1.6;
}

.ketel-resultaat-prijs {
    margin: 20px 0;
}

    .ketel-resultaat-prijs strong {
        font-size: 22px;
        margin-left: 5px;
    }

.ketel-resultaat-button {
    display: inline-block;
    padding: 12px 20px;
    background: #222;
    color: #fff;
    text-decoration: none;
    transition: background-color .2s ease;
}

    .ketel-resultaat-button:hover {
        background: #444;
    }

.ketel-geen-resultaat {
    padding: 40px;
    background: #f0f0f0;
    text-align: center;
}


@media (max-width: 700px) {

    .ketel-resultaat {
        padding: 20px;
    }

    .ketel-resultaat-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .ketel-resultaat-image img {
        height: 180px;
    }

    .ketel-resultaat-info h2 {
        font-size: 23px;
    }

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