:root {
    /* HEALTH theme: Clean, fresh, soft blue/green */
    --centrum-bg: #f4fcf9;
    --centrum-surface: #ffffff;
    --centrum-tone: #059669;
    --centrum-tone-hover: #047857;
    --centrum-ink: #1e293b;
    
    /* Fonts */
    --font-display: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
}

body {
    font-family: var(--font-body);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

h1, h2, h3, .info-heading {
    font-family: var(--font-display);
    text-transform: uppercase;
}

/* Preset C: Header with huge letter logo */
.centrum-top-bar {
    display: flex;
    align-items: center;
    padding: 1.5rem 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.centrum-logo-mark {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--centrum-tone);
    margin-right: 1.5rem;
    line-height: 1;
}

.centrum-title-wrap {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--centrum-ink);
    text-transform: uppercase;
}

@media (max-width: 768px) {
    .centrum-top-bar {
        flex-direction: column;
        text-align: center;
        padding: 1rem;
    }
    .centrum-logo-mark {
        margin-right: 0;
        margin-bottom: 0.5rem;
    }
}

/* Gallery Logic (No JS) */
.vitamin-visual-showcase {
    display: flex;
    flex-direction: column;
}

.main-view-frame {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 1rem;
    overflow: hidden;
    position: relative;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.c-photo {
    display: none;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

#c-img-1:checked ~ .main-view-frame .c-photo-1,
#c-img-2:checked ~ .main-view-frame .c-photo-2,
#c-img-3:checked ~ .main-view-frame .c-photo-3,
#c-img-4:checked ~ .main-view-frame .c-photo-4 {
    display: block;
}

/* Preset C: Thumbnails opacity logic */
.thumb-strip-bottom label {
    transition: opacity 0.3s ease, transform 0.2s ease;
    opacity: 0.5;
}

.thumb-strip-bottom label:hover {
    transform: scale(1.05);
}

#c-img-1:checked ~ .thumb-strip-bottom label[for="c-img-1"],
#c-img-2:checked ~ .thumb-strip-bottom label[for="c-img-2"],
#c-img-3:checked ~ .thumb-strip-bottom label[for="c-img-3"],
#c-img-4:checked ~ .thumb-strip-bottom label[for="c-img-4"] {
    opacity: 1;
    outline: 2px solid var(--centrum-tone);
    outline-offset: 2px;
    border-radius: 0.25rem;
}

/* Preset C: CTA Button (Left border accent + general pill & raised shadow) */
.purchase-action-trigger {
    display: inline-block;
    border-radius: 999px; /* pill styling from random settings */
    border-left: 8px solid var(--centrum-tone-hover); /* Preset C styling */
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); /* raised shadow */
}

.purchase-action-trigger:hover {
    background-color: var(--centrum-tone-hover) !important;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Preset C: Reviews style + raised shadow */
.buyer-note-row {
    border-radius: 1rem; /* rounded-2xl */
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); /* raised shadow */
    border: none; /* no borders per Preset C */
    margin-bottom: 1.5rem;
}

/* Misc layout */
.info-paragraphs p {
    margin-bottom: 1rem;
}