/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 62.5%; /* 1rem = 10px */
}

#js--body {
    font-size: 1.6rem; /* Dit wordt aangepast door de slider */
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

/* ===== Container ===== */
.container {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    max-width: 140rem;
}

/* ===== Card Base ===== */
.card {
    width: 40rem;
    height: 40rem;
    background: #ffffff;
    border-radius: 2rem;
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-0.5rem);
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.2);
}

/* ===== Slider Card ===== */
.card--slider {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4rem;
    padding: 3rem;
}

.slider-value {
    font-size: 8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 0.8rem;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 10rem;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 2.5rem;
    height: 2.5rem;
    background: #ffffff;
    border: 0.4rem solid #667eea;
    border-radius: 50%;
    cursor: grab;
    transition: all 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]::-webkit-slider-thumb:active {
    cursor: grabbing;
}

input[type="range"]::-moz-range-thumb {
    width: 2.5rem;
    height: 2.5rem;
    background: #ffffff;
    border: 0.4rem solid #667eea;
    border-radius: 50%;
    cursor: grab;
    transition: all 0.2s ease;
}

input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
}

/* ===== Buy Card ===== */
.card--buy {
    display: flex;
    flex-direction: column;
    padding: 0;
}

.image-wrapper {
    flex: 1;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-description {
    padding: 2rem;
    font-size: 1em; /* Relatief aan body font-size */
    line-height: 1.6;
    color: #555;
    background: #ffffff;
}

/* ===== Stopwatch Card ===== */
.card--stopwatch {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4rem;
    padding: 3rem;
}

.timer-display {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.timer-text {
    font-size: 4.5em; /* Relatief aan body font-size */
    font-weight: 700;
    color: #333;
    font-variant-numeric: tabular-nums;
    min-width: 9rem;
    text-align: center;
}

.timer-separator {
    font-size: 4em; /* Relatief aan body font-size */
    font-weight: 700;
    color: #667eea;
}

.button-wrapper {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    padding: 1.2rem 2.4rem;
    font-size: 1em; /* Relatief aan body font-size */
    font-weight: 600;
    border: none;
    border-radius: 1rem;
    color: #ffffff;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
}

.btn:hover {
    transform: translateY(-0.2rem);
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.2);
}

.btn:active {
    transform: translateY(0);
}

.btn--start {
    background: linear-gradient(135deg, #11998e, #38ef7d);
}

.btn--start:hover {
    background: linear-gradient(135deg, #0d7a6f, #2bc960);
}

.btn--stop {
    background: linear-gradient(135deg, #eb3349, #f45c43);
}

.btn--stop:hover {
    background: linear-gradient(135deg, #c42838, #d14837);
}

.btn--reset {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.btn--reset:hover {
    background: linear-gradient(135deg, #3a8ace, #00c8d4);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .card {
        width: 35rem;
        height: 35rem;
    }
    
    .slider-value {
        font-size: 6rem;
    }
    
    .timer-text {
        font-size: 5rem;
        min-width: 7rem;
    }
    
    .timer-separator {
        font-size: 4.5rem;
    }
}