:root {
    --primary: #ec4899;
    --secondary: #fdf2f8;
    --accent: #0891b2;
    --text: #831843;
    --bg: #fafafa;
}

/* Base resets & typography */
body {
    background: #f8fafc;
    color: #1e293b;
    font-size: clamp(14px, 1.2vw, 16px);
}

h1 {
    font-size: clamp(22px, 5vw, 36px);
}

header {
    border-bottom: 3px solid var(--primary, #2563eb);
}

/* Card components */
.card {
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Button styles */
.btn {
    border-radius: 6px;
    font-weight: 600;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Absolute sr-only for accessibility and radio handling */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* CSS-Only Gallery Implementation */
.gallery-main {
    position: relative;
    width: 100%;
    padding-bottom: 100%; /* Keeps square aspect ratio without aspect-square utility */
    overflow: hidden;
}

.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    z-index: 1;
    transition: opacity 0.3s ease-in-out;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #f8fafc;
}

/* Gallery display logic based on active radio */
#img-1:checked ~ .gallery-main .slide-1,
#img-2:checked ~ .gallery-main .slide-2,
#img-3:checked ~ .gallery-main .slide-3,
#img-4:checked ~ .gallery-main .slide-4 {
    opacity: 1;
    z-index: 10;
}

/* Active thumbnail highlight */
#img-1:checked ~ .thumbnails label[for="img-1"],
#img-2:checked ~ .thumbnails label[for="img-2"],
#img-3:checked ~ .thumbnails label[for="img-3"],
#img-4:checked ~ .thumbnails label[for="img-4"] {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--secondary);
}