:root {
    --primary-font: 'IBM Plex Sans', sans-serif;
    --serif-font: 'Cormorant Garamond', serif;
    --bg-color: #fcfcfc;
    --text-color: #333;
    --border-color: #e0e0e0;
    --accent-color: #3b5670;
}

body {
    font-family: var(--primary-font);
    background-color: var(--bg-color);
    color: var(--text-color);
}

.serif-font {
    font-family: var(--serif-font);
}

/* --- FAQ Section --- */
.faq-section {
    background: url('https://stargems.com/assets/img/explore-jewelry-collection-of-stargems.webp');
    background-size: cover;
    background-position: center;
    background-attachment: scroll;
}

.faq-header p {
    font-size: 20px !important;
}

.faq-header h1,
.faq-category h2 {
    font-weight: 700 !important;
    /* Bold */
}

/* Sticky Sidebar */
.sticky-sidebar {
    position: sticky;
    top: 40px;
    background: #fdfdfd;
    border: 1px solid var(--border-color);
}

/* Content Card */
.faq-card {
    background: #ffffff;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    padding: 3rem;
    margin-top: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 767.98px) {
    .faq-section {
        padding: 1.2rem;
    }

    .faq-card {
        padding: 1.5rem;
        /* Smaller padding on mobile */
        border-radius: 16px;
    }
}

/* --- CSS Tabs Logic --- */
.faq-category {
    display: none;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Sidebar labels pointer */
.sidebar-menu label {
    cursor: pointer;
    color: #666;
    font-weight: 500;
    transition: all 0.2s;
}

.sidebar-menu label:hover {
    color: var(--accent-color);
}

/* Logic: Show specific category when specific radio is checked */
#tab-getting-started:checked~.row .col-lg-8 #getting-started,
#tab-cad-design:checked~.row .col-lg-8 #cad-design,
#tab-production:checked~.row .col-lg-8 #production,
#tab-tools-support:checked~.row .col-lg-8 #tools-support,
#tab-shipping:checked~.row .col-lg-8 #shipping {
    display: block;
}

/* Logic: Style Active Sidebar Label */
#tab-getting-started:checked~.row .sticky-sidebar label[for="tab-getting-started"],
#tab-cad-design:checked~.row .sticky-sidebar label[for="tab-cad-design"],
#tab-production:checked~.row .sticky-sidebar label[for="tab-production"],
#tab-tools-support:checked~.row .sticky-sidebar label[for="tab-tools-support"],
#tab-shipping:checked~.row .sticky-sidebar label[for="tab-shipping"] {
    color: #000;
    font-weight: 700;
    border-left: 3px solid var(--accent-color);
    padding-left: 10px;
}

/* --- Mobile Navigation --- */
.mobile-nav-container {
    display: flex;
    flex-wrap: wrap;
    /* Wrap items to next line */
    justify-content: center;
    /* Center items */
    gap: 10px;
    padding-bottom: 5px;
}

.mobile-nav-container::-webkit-scrollbar {
    display: none;
}

.mobile-nav-pill {
    padding: 8px 16px;
    background-color: #f1f1f1;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #555;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
    /* Allow pills to shrink/grow slightly or just fit content */
}

.mobile-nav-pill:hover {
    background-color: #e0e0e0;
}

#tab-getting-started:checked~.mobile-nav-container label[for="tab-getting-started"],
#tab-cad-design:checked~.mobile-nav-container label[for="tab-cad-design"],
#tab-production:checked~.mobile-nav-container label[for="tab-production"],
#tab-tools-support:checked~.mobile-nav-container label[for="tab-tools-support"],
#tab-shipping:checked~.mobile-nav-container label[for="tab-shipping"] {
    background-color: var(--accent-color);
    color: #fff;
    font-weight: 600;
    border-color: var(--accent-color);
}

/* Accordion Details/Summary */
details.faq-item {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: #fff;
    overflow: hidden;
    transition: box-shadow 0.2s;
}

details.faq-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

summary.faq-question {
    list-style: none;
    /* Hide default triangle */
    cursor: pointer;
    font-size: 1.1rem;
}

summary.faq-question::-webkit-details-marker {
    display: none;
}

.icon-toggle {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
    color: #333;
}

details[open] .icon-toggle {
    transform: rotate(180deg);
}

.faq-answer {
    background-color: #fafafa;
    color: #555;
    line-height: 1.6;
}

/* --- Partners Section (Infinite Scroll Carousel) --- */
.partners-section {
    background: #f8f9fa;
    width: 100%;
    overflow: hidden;
    /* Hide overflow */
    padding: 60px 0;
}

.logos-track-container {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.logos-track {
    display: flex;
    width: max-content;
    /* Fit content to allow scrolling */
    gap: 50px;
    /* Space between logos */
    animation: scroll 30s linear infinite;
    /* Animation speed */
}

.partner-logo {
    height: 70px;
    width: auto;
    object-fit: contain;
    opacity: 1;
    transition: opacity 0.3s, filter 0.3s;
}

.partner-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

/* Keyframes for Marquee */
@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
        /* Move half the track width (because track is duplicated) */
    }
}

/* --- Book Demo Section --- */
.book-demo-section {
    background-color: #fff;
}

/* --- Responsive Adjustments --- */

/* Mobile (< 768px) */
@media (max-width: 767.98px) {
    .display-4 {
        font-size: 2.5rem;
        /* Smaller header */
    }

    .faq-question {
        font-size: 1rem;
        padding: 1rem !important;
        /* Tighter padding */
    }

    .faq-answer p {
        font-size: 0.95rem;
    }

    .team-image-wrapper {
        min-height: auto !important;
        height: auto !important;
    }

    .team-image-wrapper img {
        width: 100%;
        height: auto;
        display: block;
    }

    .partner-logo {
        transform: scale(1);
    }
}

/* Tablet (768px - 991px) */
@media (min-width: 768px) and (max-width: 991.98px) {

    /* Adjust grid gap or container widths if needed */
    .sticky-sidebar {
        display: none;
        /* Hide sidebar on tablet for now, or make collapsible */
    }
}

/* Large Desktop (>= 1600px) */
@media (min-width: 1600px) {
    .main-faq-container {
        max-width: 1600px;
        /* Expand container */
    }

    .Sidebar-menu a {
        font-size: 1.1rem;
    }

    .faq-question {
        font-size: 1.25rem;
    }

    .faq-answer p {
        font-size: 1.1rem;
    }

    .display-4 {
        font-size: 4.5rem;
        /* Larger header */
    }

    .lead {
        font-size: 1.5rem;
    }

    .btn-primary {
        font-size: 1.2rem;
        padding: 12px 30px !important;
    }
}