/* CSS Variables & Design System: SOFT-WARM */
:root {
    --primary: #0694a2;
    --secondary: #e6fffa;
    --accent: #f59e0b;
    --text: #2d1b0e;
    --bg: #fdf8f4;
}

/* Base resets and styling */
body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: clamp(14px, 4vw, 16px);
    overflow-x: hidden;
}

section {
    padding: 64px 16px;
}

/* Cards system */
.card {
    background: #fff;
    border: none;
    border-radius: 16px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

/* Button system */
.btn {
    border-radius: 99px;
    font-weight: 600;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Typography scale */
h1, h2 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

h2 {
    font-size: clamp(18px, 4vw, 28px);
}

/* Screen reader utility for radio buttons (Strict requirement) */
.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;
}

/* Gallery Component (Strict CSS implementation) */
.gallery-main {
    position: relative;
    width: 100%;
    padding-bottom: 100%; /* Strict height constraint */
    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: cover;
}

/* Slide selection logic */
#img-1:checked ~ .gallery-main .slide-1 {
    opacity: 1;
    z-index: 10;
}
#img-2:checked ~ .gallery-main .slide-2 {
    opacity: 1;
    z-index: 10;
}
#img-3:checked ~ .gallery-main .slide-3 {
    opacity: 1;
    z-index: 10;
}
#img-4:checked ~ .gallery-main .slide-4 {
    opacity: 1;
    z-index: 10;
}

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