/* ==========================================================================
   SRH WORLD — PRODUCT PAGE STYLESHEET
   ========================================================================== */

/* --- 1. CSS VARIABLES & RESET --- */
:root {
    --primary-dark: #0f172a;
    --primary-navy: #1e293b;
    --accent-green: #10b981;
    --accent-green-hover: #059669;
    --accent-blue: #2563eb;
    --accent-blue-hover: #1d4ed8;
    --bg-light: #f8f9fa;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-sub: #64748b;
    --border-color: #e2e8f0;
    --border-subtle: #cbd5e1;
    --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.06);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
}

*, *::before, *::after { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
}

html { 
    scroll-behavior: smooth; 
}

body { 
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif; 
    background-color: var(--bg-light); 
    color: var(--text-main); 
    line-height: 1.6; 
    overflow-x: hidden; 
    -webkit-font-smoothing: antialiased; 
}

img, video { 
    max-width: 100%; 
    height: auto; 
    display: block; 
}

a { 
    color: inherit; 
    text-decoration: none; 
}

/* --- 2. GLOBAL HEADER & NAVIGATION --- */
.header-sticky-wrapper { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    z-index: 2000; 
    transform: translateY(-100%); 
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease; 
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08); 
}

.header-sticky-wrapper.header-visible { 
    transform: translateY(0); 
}

.main-header { 
    background-color: #ffffff; 
    border-bottom: 1px solid var(--border-color); 
    width: 100%; 
}

.header-container { 
    max-width: 1240px; 
    margin: 0 auto; 
    padding: 10px 24px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    position: relative; 
}

.logo-area .client-logo { 
    height: 48px; 
    width: auto; 
    object-fit: contain; 
    display: block; 
}

.header-right-actions { 
    display: flex; 
    align-items: center; 
    gap: 14px; 
    z-index: 1050; 
}

.header-calc-pill { 
    background-color: #64748b; 
    color: #ffffff !important; 
    padding: 8px 16px; 
    border-radius: 25px; 
    font-size: 13.5px; 
    font-weight: 700; 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08); 
    transition: background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease; 
}

/* Circular Home button (moved from inline style; same look as before) */
.header-calc-pill.header-home-btn { 
    width: 42px; 
    height: 42px; 
    padding: 0; 
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
    border-radius: 50%; 
    margin-right: 10px; 
}

.header-calc-pill.header-home-btn i { 
    margin: 0; 
}

.header-calc-pill:hover { 
    background-color: var(--accent-green) !important; 
    transform: translateY(-2px) scale(1.06); 
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.4); 
}

.mobile-nav-toggle { 
    display: block; 
    background: none; 
    border: none; 
    color: var(--primary-dark); 
    font-size: 24px; 
    cursor: pointer; 
    padding: 6px; 
}

.nav-bar { 
    position: absolute; 
    top: 100%; 
    left: 0; 
    width: 100%; 
    background-color: #ffffff; 
    border-top: 1px solid var(--border-color); 
    box-shadow: 0 18px 35px rgba(0, 0, 0, 0.09); 
    max-height: 0; 
    overflow: hidden; 
    transition: max-height 0.35s ease; 
}

.nav-bar.mobile-open { 
    max-height: 85vh; 
    overflow-y: auto; 
}

.nav-list { 
    list-style: none; 
    display: flex; 
    flex-direction: column; 
    padding: 8px 0; 
}

.nav-item { 
    border-bottom: 1px solid #f1f5f9; 
}

.nav-item:last-child { 
    border-bottom: none; 
}

.nav-link { 
    color: var(--primary-dark); 
    font-weight: 700; 
    font-size: 15px; 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    padding: 14px 28px; 
    transition: 0.2s ease; 
}

.nav-link:hover, .nav-link.active { 
    background-color: #f8fafc; 
    color: var(--accent-green); 
}

.mobile-arrow { 
    margin-left: 8px; 
    font-size: 12px; 
    transition: transform 0.25s ease; 
}

.rotate-arrow { 
    transform: rotate(180deg); 
}

.horizontal-dropdown { 
    list-style: none; 
    background-color: #f8fafc; 
    max-height: 0; 
    overflow: hidden; 
    display: flex; 
    flex-direction: column; 
    transition: max-height 0.3s ease-out; 
}

.horizontal-dropdown.submenu-visible { 
    max-height: 800px; 
    border-top: 1px solid var(--border-color); 
}

.horizontal-dropdown li a { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    padding: 12px 40px; 
    color: var(--text-muted); 
    font-size: 13.5px; 
    font-weight: 600; 
    transition: 0.2s ease; 
}

.horizontal-dropdown li a:hover { 
    background-color: #edf2f7; 
    color: var(--primary-dark); 
}

.dropdown-icon { 
    font-size: 15px; 
    color: var(--accent-green); 
    width: 18px; 
    text-align: center; 
}

/* --- 3. PRODUCTS & SERVICES STACKING DECK LAYOUTS --- */
.products-stack-deck { 
    position: relative; 
    width: 100%; 
    padding-top: 75px; 
}

.stack-slide { 
    position: sticky; 
    top: 75px; 
    scroll-margin-top: 75px;
    min-height: calc(100vh - 75px); 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    padding: 70px 24px; 
    border-top: 1px solid var(--border-color); 
    box-shadow: 0 -10px 25px rgba(0, 0, 0, 0.05); 
    isolation: isolate; /* Prevents visual bleed-through from child layers */
}

/* Explicit Layering & Opaque Backgrounds */
.stack-slide:nth-child(1) { background-color: #ffffff; z-index: 1; }
.stack-slide:nth-child(2) { background-color: #f8fafc; z-index: 2; }
.stack-slide:nth-child(3) { background-color: #ffffff; z-index: 3; }
.stack-slide:nth-child(4) { background-color: #f8fafc; z-index: 4; }
.stack-slide:nth-child(5) { background-color: #ffffff; z-index: 5; }
.stack-slide:nth-child(6) { background-color: #f8fafc; z-index: 6; }
.stack-slide:nth-child(7) { background-color: #ffffff; z-index: 7; }
.stack-slide:nth-child(8) { background-color: #f8fafc; z-index: 8; }
.stack-slide:nth-child(9) { background-color: #ffffff; z-index: 9; }

.service-slide-container { 
    max-width: 1240px; 
    width: 100%; 
    margin: 0 auto; 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 60px; 
    align-items: center; 
}

.service-content-card { 
    display: flex; 
    flex-direction: column; 
    gap: 16px; 
}

.service-tag-chip { 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    font-size: 13px; 
    font-weight: 700; 
    padding: 6px 14px; 
    border-radius: 20px; 
    width: fit-content; 
    background: #f1f5f9; 
    color: var(--text-muted); 
}

.service-tag-chip.chip-blue { background: #e0f2fe; color: #0284c7; }
.service-tag-chip.chip-amber { background: #fef3c7; color: #d97706; }
.service-tag-chip.chip-purple { background: #f3e8ff; color: #9333ea; }

.service-main-heading { 
    font-size: 38px; 
    font-weight: 800; 
    color: var(--primary-dark); 
    line-height: 1.2; 
}

.service-body-copy p { 
    font-size: 15px; 
    color: var(--text-muted); 
    line-height: 1.7; 
    margin-bottom: 14px; 
}

.service-pill-list { 
    display: flex; 
    flex-direction: column; 
    gap: 10px; 
    margin: 10px 0; 
}

.service-pill-list span { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
    font-size: 14px; 
    font-weight: 600; 
    color: var(--primary-dark); 
}

.service-pill-list span i { 
    color: var(--accent-green); 
}

.service-action-bar { 
    display: flex; 
    gap: 15px; 
    margin-top: 10px; 
    flex-wrap: wrap; 
}

.admin-btn-primary, .admin-btn-secondary { 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    padding: 12px 24px; 
    border-radius: var(--radius-sm); 
    font-size: 14px; 
    font-weight: 700; 
    transition: 0.2s ease; 
    cursor: pointer; 
    text-decoration: none; 
}

.admin-btn-primary { 
    background: var(--primary-dark); 
    color: #ffffff; 
}

.admin-btn-primary:hover { 
    background: var(--accent-green); 
}

.admin-btn-secondary { 
    background: #f1f5f9; 
    color: var(--primary-dark); 
    border: 1px solid var(--border-color); 
}

.admin-btn-secondary:hover { 
    background: var(--border-color); 
}

.visual-glass-card { 
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); 
    border-radius: var(--radius-lg); 
    padding: 35px; 
    border: 1px solid #334155; 
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2); 
    color: #ffffff; 
}

.visual-card-header { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    font-size: 16px; 
    font-weight: 800; 
    color: #f8fafc; 
    border-bottom: 1px solid #334155; 
    padding-bottom: 15px; 
    margin-bottom: 25px; 
}

.visual-stat-pill { 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    background: rgba(255, 255, 255, 0.05); 
    padding: 10px 16px; 
    border-radius: 8px; 
    font-size: 13px; 
    font-weight: 700; 
    margin-top: 25px; 
    border: 1px solid rgba(255, 255, 255, 0.1); 
    width: 100%; 
    justify-content: center; 
}

.allocation-bars { 
    display: flex; 
    flex-direction: column; 
    gap: 18px; 
}

.alloc-item { 
    display: flex; 
    flex-direction: column; 
    gap: 8px; 
}

.alloc-labels { 
    display: flex; 
    justify-content: space-between; 
    font-size: 13px; 
    font-weight: 600; 
    color: #cbd5e1; 
}

.alloc-progress { 
    height: 8px; 
    background: #334155; 
    border-radius: 4px; 
    overflow: hidden; 
}

.alloc-progress span { 
    display: block; 
    height: 100%; 
    border-radius: 4px; 
}

.metrics-two-col-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 20px; 
}

.metric-box { 
    background: rgba(255, 255, 255, 0.03); 
    border: 1px solid rgba(255, 255, 255, 0.05); 
    padding: 15px; 
    border-radius: 8px; 
    display: flex; 
    flex-direction: column; 
    gap: 5px; 
}

.metric-label { 
    font-size: 12px; 
    color: #94a3b8; 
    font-weight: 600; 
    text-transform: uppercase; 
}

.metric-val { 
    font-size: 16px; 
    font-weight: 800; 
    color: #ffffff; 
}

.derivative-heatmap { 
    display: flex; 
    flex-direction: column; 
    gap: 12px; 
}

.fno-row { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    background: rgba(255,255,255,0.03); 
    padding: 12px 15px; 
    border-radius: 8px; 
    border: 1px solid rgba(255,255,255,0.05); 
    font-size: 13.5px; 
}

.fno-row span { color: #cbd5e1; font-weight: 600; }
.fno-row strong { color: #fff; font-weight: 800; }

.services-anchor-nav { 
    position: fixed; 
    right: 20px; 
    top: 50%; 
    transform: translateY(-50%); 
    display: flex; 
    flex-direction: column; 
    gap: 15px; 
    z-index: 100; 
}

.anchor-dot { 
    width: 12px; 
    height: 12px; 
    border-radius: 50%; 
    background: #cbd5e1; 
    transition: 0.3s; 
    position: relative; 
    cursor: pointer; 
    text-decoration: none; 
}

.anchor-dot.active { 
    background: var(--accent-green); 
    transform: scale(1.3); 
}

.anchor-dot span { 
    position: absolute; 
    right: 25px; 
    top: 50%; 
    transform: translateY(-50%); 
    background: var(--primary-dark); 
    color: #ffffff; 
    font-size: 11px; 
    font-weight: 700; 
    padding: 4px 10px; 
    border-radius: 4px; 
    opacity: 0; 
    visibility: hidden; 
    transition: 0.3s; 
    white-space: nowrap; 
    pointer-events: none; 
}

.anchor-dot:hover span { 
    opacity: 1; 
    visibility: visible; 
}

/* Client & Sector Badges */
.client-chips-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); 
    gap: 14px; 
    margin: 18px 0; 
}

.client-chip-card { 
    background-color: #f8fafc; 
    border: 1px solid var(--border-color); 
    border-radius: var(--radius-sm); 
    padding: 14px 18px; 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    font-size: 14px; 
    font-weight: 700; 
    color: var(--primary-dark); 
    box-shadow: var(--shadow-sm); 
}

.client-chip-card i { 
    color: var(--accent-green); 
    font-size: 18px; 
}

.sector-badge-grid { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 12px; 
    margin-top: 16px; 
}

.sector-badge { 
    background-color: #0b1120; 
    border: 1px solid #1e293b; 
    color: #e2e8f0; 
    padding: 10px 14px; 
    border-radius: 8px; 
    font-size: 12.5px; 
    font-weight: 600; 
    display: flex; 
    align-items: center; 
    gap: 8px; 
}

.sector-badge i { 
    color: #38bdf8; 
    font-size: 13px; 
}

/* --- 4. GLOBAL FOOTER & FLOATING ACTIONS --- */
.site-footer-compact { 
    background-color: var(--primary-dark); 
    color: #cbd5e1; 
    padding-top: 45px; 
    margin-top: 60px; 
    border-top: 1px solid var(--primary-navy); 
}

.footer-custom-container { 
    max-width: 1240px; 
    margin: 0 auto; 
    padding: 0 24px 35px 24px; 
    display: flex; 
    flex-direction: column; 
    gap: 32px; 
}

.footer-top-row { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    flex-wrap: wrap; 
    gap: 24px; 
    border-bottom: 1px solid #1e293b; 
    padding-bottom: 25px; 
}

.footer-brand-wrap .footer-main-logo { 
    height: 75px; 
    width: auto; 
    max-width: 320px; 
    object-fit: contain; 
}

.footer-social-icons { 
    display: flex; 
    align-items: center; 
    gap: 14px; 
}

.footer-social-icons .social-icon { 
    width: 44px; 
    height: 44px; 
    border-radius: 50%; 
    background-color: #1e293b; 
    color: #ffffff; 
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
    font-size: 19px; 
    border: 1px solid #334155; 
    transition: transform 0.2s ease; 
}

.footer-social-icons .social-icon:hover { 
    transform: translateY(-3px); 
}

.social-icon.social-fb:hover { background-color: #1877F2 !important; }
.social-icon.social-insta:hover { background-color: #d6249f !important; }
.social-icon.social-li:hover { background-color: #0A66C2 !important; }
.social-icon.social-wa:hover { background-color: #25D366 !important; }

.footer-offices-grid { 
    display: grid; 
    grid-template-columns: 1.15fr 1fr; 
    gap: 40px; 
}

.footer-office-col { 
    display: flex; 
    flex-direction: column; 
    gap: 10px; 
}

.footer-office-heading { 
    font-size: 15px; 
    font-weight: 800; 
    color: #ffffff; 
    display: flex; 
    align-items: center; 
    gap: 8px; 
    margin-bottom: 4px; 
}

.footer-office-heading i { 
    color: var(--accent-green); 
}

.footer-info-item { 
    display: flex; 
    align-items: flex-start; 
    gap: 10px; 
    font-size: 13.5px; 
    line-height: 1.55; 
}

.footer-label { 
    color: #ffffff; 
    font-weight: 700; 
    min-width: 75px; 
}

.footer-info-item a { 
    color: #ffffff; 
    font-weight: 600; 
}

.footer-info-item a:hover { 
    color: var(--accent-green); 
    text-decoration: underline; 
}

.footer-bottom-bar { 
    border-top: 1px solid var(--primary-navy); 
    padding: 18px 0; 
    background-color: #0b1120; 
}

.footer-bottom-container { 
    max-width: 1240px; 
    margin: 0 auto; 
    padding: 0 24px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    font-size: 12.5px; 
    color: #64748b; 
}

.footer-legal-links { 
    display: flex; 
    gap: 18px; 
}

.footer-legal-links a { color: #64748b; }
.footer-legal-links a:hover { color: #ffffff; }

/* Floating Buttons */
.whatsapp-float { 
    position: fixed !important; 
    bottom: 25px !important; 
    right: 25px !important; 
    background-color: #25d366 !important; 
    color: #ffffff !important; 
    width: 58px !important; 
    height: 58px !important; 
    border-radius: 50% !important; 
    display: flex !important; 
    align-items: center !important; 
    justify-content: center !important; 
    font-size: 32px !important; 
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3) !important; 
    z-index: 99999 !important; 
    transition: opacity 0.3s ease, transform 0.3s ease; 
}

.whatsapp-float.hide-floating-btn { 
    opacity: 0 !important; 
    visibility: hidden !important; 
    pointer-events: none !important; 
}

.back-to-catalogue-btn { 
    position: fixed; 
    bottom: 95px; 
    right: 25px; 
    background-color: var(--primary-dark); 
    color: #ffffff !important; 
    padding: 9px 15px; 
    border-radius: 30px; 
    display: flex; 
    align-items: center; 
    gap: 8px; 
    font-size: 12.5px; 
    font-weight: 700; 
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.28); 
    z-index: 99998; 
    opacity: 0; 
    visibility: hidden; 
    transform: translateY(15px); 
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, bottom 0.3s ease; 
    border: 1px solid #334155; 
    cursor: pointer; 
}

.back-to-catalogue-btn.show-catalogue-btn { 
    opacity: 1; 
    visibility: visible; 
    transform: translateY(0); 
}

/* When WhatsApp hides over the footer, the Top button drops into its spot (never hidden) */
.back-to-catalogue-btn.show-catalogue-btn.shift-down { 
    bottom: 25px; 
}

.back-to-catalogue-btn:hover { 
    background-color: var(--accent-green); 
}

/* --- 5. RESPONSIVE BREAKPOINTS --- */
@media (max-width: 992px) {
    .service-slide-container { 
        grid-template-columns: 1fr; 
        gap: 30px; 
    }
    /* Slide-over stacking effect is kept on tablet/mobile (sticky). 
       JS sets the exact sticky `top` per slide so tall slides are never cut off. */
    .stack-slide { 
        position: sticky; 
        top: 64px; 
        min-height: auto; 
        padding: 50px 20px; 
        scroll-margin-top: 64px; 
    }
    /* Reserve space for the fixed header so the first slide's tag is not hidden under it */
    .products-stack-deck { 
        padding-top: 64px; 
    }
    .services-anchor-nav { 
        display: none; 
    }
    .sector-badge-grid { 
        grid-template-columns: repeat(2, 1fr); 
    }
    .footer-offices-grid { 
        grid-template-columns: 1fr; 
        gap: 30px; 
    }
}

@media (max-width: 768px) {
    .header-container { padding: 10px 16px; }
    .logo-area .client-logo { height: 42px; }
    /* Equal, symmetric header buttons on mobile: Home, Calculator, Menu */
    .header-right-actions { gap: 8px; }
    .header-calc-pill,
    .header-calc-pill.header-home-btn { 
        width: 40px; 
        height: 40px; 
        padding: 0; 
        margin: 0; 
        border-radius: 50%; 
        justify-content: center; 
        align-items: center; 
        gap: 0; 
        font-size: 16px; 
    }
    .header-calc-pill i, 
    .header-calc-pill.header-home-btn i { 
        font-size: 16px; 
        margin: 0; 
        line-height: 1; 
    }
    .calc-btn-text { display: none; }
    .mobile-nav-toggle { 
        width: 40px; 
        height: 40px; 
        padding: 0; 
        display: inline-flex; 
        align-items: center; 
        justify-content: center; 
        font-size: 20px; 
        line-height: 1; 
    }
    .mobile-nav-toggle i { font-size: 20px; line-height: 1; }
    .service-main-heading { font-size: 30px; }
    .service-body-copy p { font-size: 14px; }
    .visual-glass-card { padding: 25px; }
    .metrics-two-col-grid { grid-template-columns: 1fr; }
    .footer-top-row { flex-direction: column; align-items: flex-start; }
    .footer-bottom-container { flex-direction: column; gap: 15px; text-align: center; }
    .footer-legal-links { flex-wrap: wrap; justify-content: center; gap: 12px; }
    .whatsapp-float { width: 52px !important; height: 52px !important; right: 18px !important; bottom: 18px !important; font-size: 28px !important; }
    .back-to-catalogue-btn { right: 18px; bottom: 85px; }
}

@media (max-width: 650px) {
    .sector-badge-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .service-slide-container { gap: 25px; }
    .service-main-heading { font-size: 27px; }
    .service-action-bar { flex-direction: column; align-items: stretch; }
    .admin-btn-primary, .admin-btn-secondary { justify-content: center; width: 100%; }
    .visual-glass-card { padding: 20px; }
    .visual-card-header { font-size: 14px; }
    .alloc-labels { gap: 10px; flex-direction: column; }
    .fno-row { flex-direction: column; align-items: flex-start; gap: 6px; }
}