:root {
    --gluco-bg: #f3fdf8; /* Soft, clean health-oriented background */
    --gluco-surface: #ffffff;
    --gluco-tone: #0d9488; /* Teal accent - Health theme */
    --gluco-tone-hover: #0f766e;
    --gluco-ink: #1e293b;
    --gluco-shadow-color: rgba(13, 148, 136, 0.15);
    
    --font-display: 'Oswald', sans-serif;
    --font-body: 'Lato', sans-serif;
}

body.gluco-page-body {
    background-color: var(--gluco-bg);
    color: var(--gluco-ink);
    font-family: var(--font-body);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    text-transform: uppercase;
    font-weight: 700;
    margin: 0;
}

/* Header - Preset A */
.gluco-top-band {
    background-color: var(--gluco-surface);
    border-bottom: 4px solid var(--gluco-tone);
    padding: 1.5rem 1rem;
    text-align: center;
    box-shadow: 0 4px 6px -1px var(--gluco-shadow-color);
}

.gluco-brand-title {
    font-size: 1.1rem;
    max-width: 900px;
    margin: 0 auto;
    color: var(--gluco-ink);
    line-height: 1.4;
}

@media (min-width: 768px) {
    .gluco-brand-title { font-size: 1.3rem; }
}

.gluco-core-content {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Product Area */
.gluco-item-showcase {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    background-color: var(--gluco-surface);
    padding: 1.5rem;
    border-radius: 16px; /* soft radius */
    box-shadow: 0 4px 6px -1px var(--gluco-shadow-color), 0 2px 4px -1px rgba(0, 0, 0, 0.06); /* raised shadow */
}

@media (min-width: 860px) {
    .gluco-item-showcase {
        flex-direction: row;
        padding: 2.5rem;
    }
    .gluco-visual-cluster { flex: 0 0 45%; }
    .gluco-info-panel { flex: 1; }
}

/* CSS-Only Gallery */
.gluco-pic-radio { display: none; }
.gluco-main-pic-stage {
    background-color: #f8fafc;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid #e2e8f0;
}
.gluco-slide { 
    opacity: 0; 
    transition: opacity 0.3s ease-in-out; 
    pointer-events: none; 
}

#gluco-pic-1:checked ~ .gluco-main-pic-stage .gluco-slide-1,
#gluco-pic-2:checked ~ .gluco-main-pic-stage .gluco-slide-2,
#gluco-pic-3:checked ~ .gluco-main-pic-stage .gluco-slide-3,
#gluco-pic-4:checked ~ .gluco-main-pic-stage .gluco-slide-4 {
    opacity: 1;
    pointer-events: auto;
    z-index: 2;
}

/* Thumbnails - Preset A (Bottom) */
.gluco-thumb-strip {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    justify-content: center;
}
.gluco-thumb-trigger {
    width: 64px;
    height: 64px;
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.2s;
    background-color: var(--gluco-surface);
}
.gluco-thumb-trigger img { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
}
.gluco-thumb-trigger:hover {
    border-color: #cbd5e1;
}

#gluco-pic-1:checked ~ .gluco-thumb-strip label[for="gluco-pic-1"],
#gluco-pic-2:checked ~ .gluco-thumb-strip label[for="gluco-pic-2"],
#gluco-pic-3:checked ~ .gluco-thumb-strip label[for="gluco-pic-3"],
#gluco-pic-4:checked ~ .gluco-thumb-strip label[for="gluco-pic-4"] {
    border-color: var(--gluco-tone);
    box-shadow: 0 0 0 1px var(--gluco-tone);
}

/* Product Info */
.gluco-product-heading {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: var(--gluco-tone);
    line-height: 1.3;
}
.gluco-perks-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin: 0;
}
.gluco-perks-list li {
    font-size: 1rem;
    color: #334155;
    position: relative;
    padding-left: 1.25rem;
}
.gluco-perks-list li::before {
    content: "•";
    color: var(--gluco-tone);
    position: absolute;
    left: 0;
    top: -2px;
    font-size: 1.5rem;
    line-height: 1;
}
.gluco-highlight-point {
    font-family: var(--font-display);
    color: var(--gluco-ink);
    display: block;
    margin-bottom: 0.25rem;
    letter-spacing: 0.5px;
}

/* CTA - Preset A (Pill with hover shadow) */
.gluco-action-area {
    margin: 3.5rem 0;
    text-align: center;
}
.gluco-purchase-trigger {
    display: inline-block;
    background-color: var(--gluco-tone);
    color: #ffffff;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    padding: 1.1rem 3.5rem;
    border-radius: 999px; /* Pill */
    text-decoration: none;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px var(--gluco-shadow-color);
}
.gluco-purchase-trigger:hover {
    background-color: var(--gluco-tone-hover);
    box-shadow: 0 10px 15px -3px var(--gluco-shadow-color), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

/* Reviews - Preset A (Left colored border) */
.gluco-feedback-zone {
    background-color: var(--gluco-surface);
    padding: 2rem 1.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px var(--gluco-shadow-color);
}
@media (min-width: 600px) {
    .gluco-feedback-zone { padding: 3rem; }
}

.gluco-feedback-title {
    font-size: 1.7rem;
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--gluco-ink);
    letter-spacing: 0.5px;
}

.gluco-buyer-note-row {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.gluco-buyer-note {
    border-left: 4px solid var(--gluco-tone);
    padding-left: 1.25rem;
    background-color: #fafcfb;
    padding-top: 1rem;
    padding-bottom: 1rem;
    padding-right: 1rem;
    border-radius: 0 12px 12px 0;
}
@media (min-width: 600px) {
    .gluco-buyer-note { padding-left: 1.75rem; }
}

.gluco-buyer-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.25rem;
}
.gluco-buyer-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    background-color: #e2e8f0;
}
.gluco-buyer-meta {
    display: flex;
    flex-direction: column;
}
.gluco-buyer-name {
    font-weight: 700;
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--gluco-ink);
}
.gluco-stars {
    color: #fbbf24;
    font-size: 1.1rem;
    letter-spacing: 1px;
}
.gluco-buyer-date {
    font-size: 0.85rem;
    color: #64748b;
    margin-bottom: 1.25rem;
}
.gluco-buyer-words {
    font-size: 1rem;
    color: #334155;
    white-space: pre-wrap;
    line-height: 1.7;
}

/* Footer */
.gluco-bottom-band {
    background-color: var(--gluco-surface);
    padding: 2.5rem 1.5rem;
    text-align: center;
    margin-top: 4rem;
    border-top: 1px solid #e2e8f0;
}
.gluco-bottom-title {
    font-family: var(--font-display);
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
    color: #64748b;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}
.gluco-bottom-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    font-size: 0.9rem;
}
.gluco-bottom-links a {
    color: var(--gluco-tone);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}
.gluco-bottom-links a:hover {
    color: var(--gluco-tone-hover);
    text-decoration: underline;
}