/* ==========================================================================
   ELEVATEBUILD - CUSTOM PREMIUM VANILLA STYLESHEET (REVISED DESIGN)
   Aesthetic: Ultra-clean, Spacious, Minimalist Architectural Glazing
   Layout: Fully Centralized, Posh Service Cards, SF Pro Typography
   ========================================================================== */

/* Design Tokens & CSS Custom Properties */
:root {
    /* Colors */
    --color-primary: #002149;           /* Deep Premium Navy Blue */
    --color-primary-rgb: 0, 33, 73;
    --color-accent: #C9CCCF;            /* Sleek Silver/Chrome */
    --color-accent-dark: #93979C;       /* Muted Chrome */
    --color-dark: #16181B;              /* Rich Slate Dark Gray / Off-black */
    --color-dark-rgb: 22, 24, 27;
    --color-text-muted: #65696D;        /* Medium Muted Gray */
    --color-bg-light: #F8F9FA;          /* Subtle Off-white */
    --color-bg-white: #FFFFFF;          /* Pure White */
    --color-border: #E2E8F0;            /* Ultra-soft border */
    --color-border-hover: #93979C;      /* Border highlight */

    /* Typography - Fluid scales using clamp() */
    --font-hero: clamp(2.2rem, 5vw + 1rem, 4.8rem);
    --font-h2: clamp(1.75rem, 3vw + 0.8rem, 3rem);
    --font-h3: clamp(1.15rem, 1.5vw + 0.2rem, 1.5rem);
    --font-body: clamp(0.95rem, 0.2vw + 0.85rem, 1.05rem);
    --font-meta: clamp(0.75rem, 0.1vw + 0.75rem, 0.85rem);
    --font-tracking-wide: 0.15em;
    --font-tracking-widest: 0.25em;

    /* Spacing - Fluid scales using clamp() */
    --space-xs: clamp(0.5rem, 1vw, 0.75rem);
    --space-sm: clamp(0.8rem, 1.5vw, 1.25rem);
    --space-md: clamp(1.5rem, 3vw, 2.5rem);
    --space-lg: clamp(3rem, 6vw, 5rem);
    --space-xl: clamp(5rem, 10vw, 8.5rem);
    
    /* Layout Constants */
    --max-width: 1280px;
    --header-height: 80px;
    --border-radius: 0; /* Clean, architectural sharp corners */
    --transition-premium: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

/* Base Reset & Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    /* Strict SF Pro Display Font Stack */
    font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--color-dark);
    background-color: var(--color-bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography elements */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.15;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

p {
    color: var(--color-text-muted);
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

/* Premium Layout & Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
}

/* Sections */
section {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
    position: relative;
}

/* Buttons & Interactive Elements */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-meta);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
    padding: 1rem 2.25rem;
    border-radius: var(--border-radius);
    transition: var(--transition-premium);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-bg-white);
}

.btn-primary:hover {
    background-color: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 33, 73, 0.1);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-bg-white);
    transform: translateY(-2px);
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    font-size: var(--font-meta);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
    color: var(--color-primary);
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.link-arrow span {
    transition: var(--transition-fast);
}

.link-arrow:hover {
    color: var(--color-dark);
}

.link-arrow:hover span {
    transform: translateX(4px);
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 33, 73, 0.05);
    z-index: 1000;
    transition: var(--transition-premium);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    height: 70px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.02);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo-link {
    display: flex;
    align-items: center;
    height: 100%;
}

.logo-img {
    height: 60px; /* Enlarged header logo height */
    width: auto;
    object-fit: contain;
    transition: var(--transition-premium);
}

.header.scrolled .logo-img {
    height: 50px; /* Scaling down logo slightly when scrolled */
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.nav-link {
    font-size: var(--font-meta);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
    color: var(--color-dark);
    padding: 0.5rem 0;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    opacity: 0.85;
}

.mobile-only-cta {
    display: none; /* Hidden on desktop to prevent duplicate navigation links */
}

/* Hamburger toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1100;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    position: relative;
    transition: var(--transition-premium);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    left: 0;
    transition: var(--transition-premium);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Hamburger active animation */
.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
}

/* Hero Section - Centralized with Background Image & Dimmed Gradient Overlay */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: calc(var(--header-height) + var(--space-md));
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.6)), url('heroimage.jpg') no-repeat center/cover;
    text-align: center;
}

.hero-grid {
    display: block; /* Centered single-column layout */
    width: 100%;
}

.hero-content {
    max-width: 1000px; /* Wider to fill the space on the sides */
    margin: 0 auto;
    background: transparent; /* No glassmorphism */
    border: none;
    padding: var(--space-md) var(--space-sm);
    box-shadow: none;
}

.hero-tag {
    font-size: var(--font-meta);
    font-weight: 700;
    letter-spacing: var(--font-tracking-widest);
    color: var(--color-accent); /* Muted silver for dark background */
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
    display: inline-block;
}

.hero-title {
    font-size: var(--font-hero);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: var(--space-md);
    color: var(--color-bg-white); /* Pure white text */
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 0.5vw + 1rem, 1.4rem);
    font-weight: 400;
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.85); /* Soft white text */
    margin-bottom: var(--space-md);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center; /* Centralized hero CTAs */
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-actions .btn-primary {
    background-color: var(--color-bg-white);
    color: var(--color-primary);
    border: 1px solid var(--color-bg-white);
}

.hero-actions .btn-primary:hover {
    background-color: transparent;
    color: var(--color-bg-white);
    border-color: var(--color-bg-white);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

.hero .link-arrow {
    color: var(--color-bg-white);
}

.hero .link-arrow:hover {
    color: var(--color-accent);
}

/* Solutions Section */
.solutions {
    background-color: var(--color-bg-white);
}

.section-header {
    max-width: 780px;
    margin: 0 auto var(--space-lg) auto;
    text-align: center; /* Centralized section title text */
}

.section-tag {
    font-size: var(--font-meta);
    font-weight: 700;
    letter-spacing: var(--font-tracking-widest);
    color: var(--color-primary);
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
    display: block;
}

.section-title {
    font-size: var(--font-h2);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
}

.section-desc {
    font-size: var(--font-body);
    color: var(--color-text-muted);
}

/* Solutions Grid */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

/* Service Card Layout - Flat, Centralized & borderless */
.solution-card {
    background-color: transparent;
    border: none;
    padding: 0;
    border-radius: 0;
    transition: var(--transition-premium);
    display: flex;
    flex-direction: column;
    align-items: center; /* Centralized content alignment */
    text-align: center;
    height: 100%;
}

.solution-card:hover {
    /* No card container highlights */
}

.solution-title {
    font-size: var(--font-h3);
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
}

/* Square image container below title */
.solution-img-container {
    width: 100%;
    aspect-ratio: 1 / 1; /* Forces exact square shape */
    overflow: hidden;
    margin-bottom: var(--space-md);
    border-radius: 0; /* Flat, sharp corners */
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-light);
    transition: var(--transition-premium);
}

.solution-card:hover .solution-img-container {
    border-color: var(--color-primary); /* Highlight image border instead of card */
}

.solution-img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Crops image cleanly */
    transition: var(--transition-premium);
}

.solution-card:hover .solution-img {
    transform: scale(1.02);
}

/* Slideshow Rotator Style overrides */
.solution-img-container.slideshow {
    position: relative;
}

.solution-img-container.slideshow .solution-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    z-index: 1;
    transition: opacity 1s ease-in-out, transform 0.5s ease-out; /* Smooth opacity cross-fade + hover zoom transition */
}

.solution-img-container.slideshow .solution-img.active {
    opacity: 1;
    z-index: 2;
}

.solution-card:hover .solution-img-container.slideshow .solution-img.active {
    transform: scale(1.02);
}

.solution-text {
    font-size: var(--font-body);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    line-height: 1.6;
    flex-grow: 1;
}

.card-cta {
    margin-top: auto;
    width: 100%;
}

/* Value Proposition Section - Flat & Centralized */
.value-prop {
    background-color: var(--color-bg-white);
}

.value-grid {
    display: grid;
    grid-template-columns: 1fr; /* Centralized layout */
    gap: var(--space-lg);
    text-align: center;
}

.value-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 3 column flat grid */
    gap: var(--space-md);
    margin-top: var(--space-sm);
}

.value-item {
    border-left: none; /* Flat style - remove all borders */
    padding-left: 0;
    display: flex;
    flex-direction: column;
    align-items: center; /* Centralize values */
    text-align: center;
}

.value-icon-container {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.value-icon-container svg {
    width: 100%;
    height: 100%;
    stroke-width: 1.25;
}

.value-item-title {
    font-size: var(--font-h3);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
}

.value-item-desc {
    font-size: var(--font-meta);
    color: var(--color-text-muted);
    line-height: 1.55;
    max-width: 280px;
}

/* Promotion Banner - Full Width Flush with Footer & Dimmed Gradient Overlay */
.promotion-banner {
    background: linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.65)), url('buyfromus.jpg') no-repeat center/cover;
    padding: var(--space-xl) 0; /* Premium spacious vertical padding */
    border-radius: 0; /* Completely flat, joins footer */
    text-align: center;
    position: relative;
    overflow: hidden;
    width: 100%;
    margin-bottom: 0; /* Directly flush with footer border */
}

.promotion-content {
    max-width: 1000px; /* Centered layout width */
    margin: 0 auto;
    background: transparent; /* No glassmorphism */
    border: none;
    padding: var(--space-md) var(--space-sm);
    box-shadow: none;
}

.promotion-tag {
    font-size: var(--font-meta);
    font-weight: 700;
    letter-spacing: var(--font-tracking-widest);
    color: var(--color-accent); /* Muted silver for dark background */
    text-transform: uppercase;
    margin-bottom: var(--space-sm);
    display: block;
}

.promotion-title {
    font-size: var(--font-h2);
    color: var(--color-bg-white); /* Pure white text */
    max-width: 900px;
    margin: 0 auto var(--space-md) auto;
    font-weight: 800;
    line-height: 1.1;
}

.promotion-title span {
    color: var(--color-accent); /* Silver/chrome accent text */
}

.promotion-cta-btn {
    background-color: var(--color-bg-white);
    color: var(--color-primary);
    border: 1px solid var(--color-bg-white);
}

.promotion-cta-btn:hover {
    background-color: transparent;
    color: var(--color-bg-white);
    border-color: var(--color-bg-white);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.1);
}

/* Footer & Contact Section */
/* ==========================================================================
   Footer Section - Collapsible Accordions, Circular Socials, Pill Back to Top
   ========================================================================== */
.footer {
    background-color: var(--color-dark);
    color: var(--color-bg-white);
    padding-top: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 4 Columns on desktop */
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

/* Accordion Header / Column Titles */
.footer-accordion-header {
    color: var(--color-bg-white);
    font-size: var(--font-meta);
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
    margin-bottom: var(--space-sm);
    font-weight: 700;
}

.footer-links-list {
    list-style: none;
}

.footer-links-list li {
    margin-bottom: 0.75rem;
}

.footer-links-list a {
    color: var(--color-accent);
    font-size: var(--font-meta);
    transition: var(--transition-fast);
}

.footer-links-list a:hover {
    color: var(--color-bg-white);
}

/* Contact List specific */
.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: var(--font-meta);
    color: var(--color-accent);
}

.footer-contact-item svg {
    width: 18px;
    height: 18px;
    stroke: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-contact-item a {
    transition: var(--transition-fast);
}

.footer-contact-item a:hover {
    color: var(--color-bg-white);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-logo {
    height: 54px;
    width: auto;
    align-self: flex-start;
    filter: brightness(0) invert(1);
}

/* Center Bottom footer elements */
.footer-bottom-container {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: var(--space-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-sm);
}

/* Center links with pipe separators */
.footer-meta-links {
    font-size: var(--font-meta);
    color: var(--color-accent-dark);
    margin-bottom: 4px;
}

.footer-meta-links a {
    color: var(--color-accent);
    transition: var(--transition-fast);
}

.footer-meta-links a:hover {
    color: var(--color-bg-white);
}

.copyright {
    font-size: var(--font-meta);
    color: var(--color-accent-dark);
}

.regional-presence {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: var(--font-meta);
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: var(--font-tracking-wide);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.zim-flag-img {
    height: 18px;
    width: auto;
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: inline-block;
}

/* Circular Social Icons */
.footer-social-row {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.footer-social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--color-bg-white);
    color: var(--color-dark);
    transition: var(--transition-premium);
}

.footer-social-link svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.footer-social-link:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* Pill-shaped Back to Top button */
.back-to-top-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--color-accent);
    border-radius: 20px; /* Pill */
    color: var(--color-accent);
    font-size: var(--font-meta);
    text-transform: uppercase;
    letter-spacing: var(--font-tracking-wide);
    transition: var(--transition-premium);
    cursor: pointer;
    background: transparent;
    margin-top: 0.5rem;
}

.back-to-top-btn:hover {
    background-color: var(--color-bg-white);
    color: var(--color-dark);
    border-color: var(--color-bg-white);
    transform: translateY(-2px);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .value-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    /* Toggle show nav */
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--color-bg-white);
        flex-direction: column;
        justify-content: center;
        gap: 2.5rem;
        padding-bottom: 5rem;
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition-premium);
        z-index: 999;
        pointer-events: none;
        border-top: 1px solid var(--color-border);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-link {
        font-size: 1.1rem;
    }
    
    .header-cta {
        display: none; /* Hide top right CTA on mobile, keep inside menu or hero */
    }

    .mobile-only-cta {
        display: inline-flex; /* Show inside mobile menu */
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .value-list {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 0; /* Tight grid gap for mobile accordions */
    }

    /* Mobile Footer Accordion */
    .footer-accordion-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding: 1rem 0;
        margin-bottom: 0;
        cursor: pointer;
    }
    .footer-accordion-header::after {
        content: '+';
        font-size: 1.1rem;
        color: var(--color-accent);
        transition: var(--transition-fast);
    }
    .footer-accordion-header.active::after {
        content: '−';
    }
    .footer-links-list {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }
    .footer-accordion-header.active + .footer-links-list {
        max-height: 350px;
        padding-top: 1rem;
        padding-bottom: 1rem;
    }
}

/* ==========================================================================
   PREMIUM LOADING SCREEN
   ========================================================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--color-bg-white, #FFFFFF);
    z-index: 99999;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    max-width: 90%;
    text-align: center;
}

.loading-logo {
    height: 80px;
    width: auto;
    object-fit: contain;
    animation: loadingLogoEntrance 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.loading-bar-container {
    width: 180px;
    height: 3px;
    background-color: rgba(0, 33, 73, 0.06);
    position: relative;
    overflow: hidden;
}

.loading-bar {
    width: 0%;
    height: 100%;
    background-color: var(--color-primary, #002149);
    animation: loadProgressBar 4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Animations */
@keyframes loadingLogoEntrance {
    0% {
        opacity: 0;
        transform: scale(0.96) translateY(8px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes loadProgressBar {
    0% {
        width: 0%;
    }
    100% {
        width: 100%;
    }
}

/* Scroll lock when loading */
body.loading-active {
    overflow: hidden !important;
}