/* ==========================================================================
   CCS Construction - Premium global design system (v4 Scratch Build)
   ========================================================================== */

/* --- Import Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700;800&display=swap');

/* --- Brand Variables / Design System --- */
:root {
    /* Palette */
    --color-primary: #ffb200;         /* Official Logo Construction Gold */
    --color-primary-hover: #e09d00;   /* Slightly deeper gold */
    --color-dark-bg: #0b0f19;         /* Dark Carbon Charcoal */
    --color-dark-card: #151e2e;       /* Card/Panel Slate */
    --color-dark-text: #f8fafc;       /* Off-White */
    --color-light-bg: #f8fafc;        /* Soft White */
    --color-light-card: #ffffff;      /* White */
    --color-light-text: #0f172a;      /* Slate/Navy */
    --color-body-gray: #64748b;       /* Readable Cool Grey */
    --color-body-dark-gray: #94a3b8;  /* Light grey for dark mode text */
    --color-border: #e2e8f0;          /* Subtle Slate Border */
    --color-border-dark: #1e293b;
    --color-accent-red: #ef4444;      
    
    /* Typography */
    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shapes */
    --radius-sm: 6px;
    --radius-md: 14px;
    --radius-lg: 28px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-subtle: 0 4px 6px -1px rgba(15, 23, 42, 0.03), 0 2px 4px -2px rgba(15, 23, 42, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.06), 0 4px 6px -4px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.08);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-light-bg);
    color: var(--color-body-gray);
    line-height: 1.7;
    overflow-x: hidden;
    width: 100%;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-light-text);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 0.75rem;
}

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

/* --- Layout Utilities --- */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}
@media (max-width: 768px) {
    .section-padding { padding: 60px 0; }
}

/* Background Variations */
.bg-dark {
    background-color: var(--color-dark-bg);
    color: var(--color-body-dark-gray);
}
.bg-dark h2, .bg-dark h3, .bg-dark h4 {
    color: var(--color-dark-text);
}
.bg-dark-card {
    background-color: var(--color-dark-card);
    border: 1px solid var(--color-border-dark);
}

.bg-light-gray {
    background-color: #f1f5f9;
}

/* Text Highlights */
.highlight {
    color: var(--color-primary);
    position: relative;
    display: inline-block;
}

/* --- Interactive Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 700;
    padding: 14px 30px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #000000;
}
.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 178, 0, 0.25);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-dark-text);
    border-color: var(--color-dark-text);
}
.btn-secondary:hover {
    background-color: var(--color-dark-text);
    color: var(--color-dark-bg);
    transform: translateY(-3px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-light-text);
    border-color: var(--color-light-text);
}
.btn-outline:hover {
    background-color: var(--color-light-text);
    color: var(--color-light-bg);
    transform: translateY(-3px);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* --- Section Title Header --- */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}
.section-tagline {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.85rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: 12px;
}
.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}
.section-header .divider {
    width: 60px;
    height: 4px;
    background-color: var(--color-primary);
    margin: 20px auto 0;
    border-radius: var(--radius-full);
}

/* --- Header & Navigation --- */
.main-header {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-subtle);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}
.main-header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 5px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 24px;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-img {
    height: 75px;
    width: auto;
}
.logo-text {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
    color: var(--color-light-text);
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
}
.nav-list {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}
.nav-link {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-light-text);
    text-transform: uppercase;
    position: relative;
    padding: 6px 0;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal);
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}
.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

/* Language Swapper Selector */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    background: #e2e8f0;
    padding: 6px 14px;
    border-radius: var(--radius-full);
}
.lang-link {
    color: var(--color-body-gray);
}
.lang-link:hover {
    color: var(--color-primary-hover);
}
.lang-label.active {
    color: var(--color-light-text);
}
.lang-divider {
    color: var(--color-body-gray);
    opacity: 0.4;
}

/* Hamburger toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1010;
}
.mobile-menu-toggle .bar {
    width: 100%;
    height: 3px;
    background-color: var(--color-light-text);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

/* Mobile responsive menu */
@media (max-width: 991px) {
    .main-header {
        backdrop-filter: none !important;
        background-color: #ffffff !important;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        width: 300px;
        height: 100vh;
        background-color: var(--color-light-card);
        box-shadow: var(--shadow-xl);
        padding: 100px 40px 40px;
        transform: translateX(100%);
        opacity: 0;
        pointer-events: none;
        transition: transform var(--transition-normal), opacity var(--transition-normal);
        z-index: 1005;
        flex-direction: column;
        align-items: flex-start;
        visibility: hidden;
    }
    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        pointer-events: auto;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 24px;
    }
    .nav-item {
        width: 100%;
    }
    .nav-link {
        font-size: 1.1rem;
        display: block;
        width: 100%;
    }
    
    /* Toggle active animation */
    .mobile-menu-toggle.active .bar:nth-child(1) {
        transform: translateY(7.5px) rotate(45deg);
    }
    .mobile-menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-7.5px) rotate(-45deg);
    }
}

/* --- Parallax Hero Slider --- */
.hero-slider {
    position: relative;
    height: 95vh;
    min-height: 650px;
    width: 100%;
    background-color: var(--color-dark-bg);
    overflow: hidden;
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    visibility: hidden;
    z-index: 1;
    transition: opacity var(--transition-slow) ease-in-out, visibility var(--transition-slow);
    display: flex;
    align-items: center;
}

.slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(11, 15, 25, 0.85) 30%, rgba(11, 15, 25, 0.4) 100%);
    z-index: 2;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.slide-content {
    color: var(--color-dark-text);
    max-width: 850px;
    padding: 0 40px;
    z-index: 3;
    margin-left: 8%;
}

.slide-subtitle {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--color-primary);
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(30px);
    transition: transform var(--transition-slow), opacity var(--transition-slow);
}

.slide-title {
    font-size: 4.5rem;
    color: var(--color-dark-text);
    font-weight: 900;
    text-transform: uppercase;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
    line-height: 1.1;
    opacity: 0;
    transform: translateY(30px);
    transition: transform var(--transition-slow) 0.15s, opacity var(--transition-slow) 0.15s;
}

.slide-text {
    font-size: 1.2rem;
    opacity: 0;
    color: var(--color-body-dark-gray);
    margin-bottom: 40px;
    max-width: 650px;
    transform: translateY(30px);
    transition: transform var(--transition-slow) 0.30s, opacity var(--transition-slow) 0.30s;
}

.slide-actions {
    display: flex;
    gap: 16px;
    opacity: 0;
    transform: translateY(30px);
    transition: transform var(--transition-slow) 0.45s, opacity var(--transition-slow) 0.45s;
}

/* Active transitions */
.slide.active .slide-subtitle,
.slide.active .slide-title,
.slide.active .slide-text,
.slide.active .slide-actions {
    opacity: 1;
    transform: translateY(0);
}

/* Slider Controls */
.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-dark-text);
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}
.slider-nav:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #000000;
}
.prev-btn { left: 40px; }
.next-btn { right: 40px; }

/* Dots Pagination */
.slider-dots {
    position: absolute;
    bottom: 78px;
    left: calc(8% + 40px);
    display: flex;
    gap: 14px;
    z-index: 10;
}
.slider-dots .dot {
    width: 24px;
    height: 3px;
    background-color: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: all var(--transition-normal);
}
.slider-dots .dot.active {
    background-color: var(--color-primary);
    width: 50px;
}

@media (max-width: 991px) {
    .slide-content { margin-left: 0; padding: 0 24px; }
    .slide-title { font-size: 3rem; }
    .slide-text { font-size: 1.05rem; }
    .slider-dots { left: 24px; }
    .slider-nav {
        top: 50%;
        transform: translateY(-50%);
        bottom: auto;
        right: auto;
    }
    .prev-btn { left: 15px; }
    .next-btn { right: 15px; }
}

/* --- High-Impact Stats counters ribbon --- */
.stats-ribbon {
    margin-top: -60px;
    position: relative;
    z-index: 20;
}
.stats-ribbon-wrapper {
    background: var(--color-dark-card);
    border-top: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}
.stats-card {
    text-align: center;
    border-right: 1px solid var(--color-border-dark);
}
.stats-card:last-child {
    border-right: none;
}
.stats-num {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.1;
    margin-bottom: 8px;
}
.stats-lbl {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-body-dark-gray);
}

@media (max-width: 991px) {
    .stats-ribbon { margin-top: 0; padding: 40px 0 0; }
    .stats-ribbon-wrapper { padding: 30px 20px; }
    .stats-card { border-right: none; border-bottom: 1px solid var(--color-border-dark); padding-bottom: 20px; }
    .stats-card:last-child { border-bottom: none; padding-bottom: 0; }
}

/* --- Company Pillars Grid --- */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
    gap: 30px;
}
.pillar-card {
    background: var(--color-light-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 48px 40px;
    box-shadow: var(--shadow-subtle);
    transition: all var(--transition-normal);
}
.pillar-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}
.pillar-icon-box {
    width: 68px;
    height: 68px;
    background: var(--color-light-bg);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 30px;
    transition: all var(--transition-normal);
}
.pillar-card:hover .pillar-icon-box {
    background-color: var(--color-primary);
    color: #000000;
}
.pillar-card h3 {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 16px;
}
.pillar-card p {
    font-size: 0.95rem;
    color: var(--color-body-gray);
}

/* --- Services Card Grid (from v3) --- */
.services-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}
.service-card {
    background: var(--color-light-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 48px 40px;
    box-shadow: var(--shadow-subtle);
    transition: all var(--transition-normal);
}
.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}
.service-card .service-icon {
    width: 64px;
    height: 64px;
    background: var(--color-light-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: 28px;
    transition: all var(--transition-normal);
}
.service-card:hover .service-icon {
    background: var(--color-primary);
    color: var(--color-dark-bg);
}
.service-card h3 {
    font-size: 1.35rem;
    margin-bottom: 16px;
    font-weight: 800;
    color: var(--color-light-text);
}
.service-card p {
    font-size: 0.95rem;
    color: var(--color-body-gray);
    margin: 0;
}

/* --- Asymmetrical Story Section --- */
.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.story-photo-wrapper {
    position: relative;
}
.story-main-img {
    width: 85%;
    height: 480px;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}
.story-overlap-card {
    position: absolute;
    bottom: -40px;
    right: 0;
    width: 55%;
    background-color: var(--color-primary);
    color: #000000;
    padding: 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}
.story-overlap-card h4 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 4px;
    color: #000000;
}
.story-overlap-card p {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@media (max-width: 991px) {
    .story-grid { grid-template-columns: 1fr; gap: 60px; }
    .story-main-img { width: 100%; height: 350px; }
    .story-overlap-card { position: static; width: 100%; margin-top: 20px; }
}

/* --- Core Expertise Interactive Tabs --- */
.expertise-section {
    background-color: var(--color-dark-bg);
}
.tabs-control-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 50px;
}
.tab-btn {
    background: var(--color-dark-card);
    border: 1px solid var(--color-border-dark);
    color: var(--color-body-dark-gray);
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.tab-btn:hover,
.tab-btn.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #000000;
}

.tab-content-panel {
    display: none;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}
.tab-content-panel.active {
    display: grid;
    opacity: 1;
    transform: translateY(0);
}
.tab-text-pane h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}
.tab-text-pane p {
    margin-bottom: 30px;
    font-size: 1.05rem;
}
.tab-bullets {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.tab-bullets li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--color-dark-text);
}
.tab-bullets li i {
    color: var(--color-primary);
}
.tab-image-pane {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}
.tab-img {
    width: 100%;
    height: 420px;
    object-fit: cover;
}

@media (max-width: 991px) {
    .tab-content-panel { grid-template-columns: 1fr; gap: 40px; }
    .tab-img { height: 280px; }
    .tab-bullets { grid-template-columns: 1fr; }
}

/* --- Project Carousel Preview --- */
.carousel-outer {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 10px 0;
}
.carousel-track {
    display: flex;
    gap: 30px;
    transition: transform var(--transition-normal) ease-out;
}
.carousel-card {
    min-width: 320px;
    width: 320px;
    flex-shrink: 0;
    background: var(--color-light-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
    transition: all var(--transition-normal);
}
.carousel-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}
.carousel-img-wrap {
    height: 240px;
    overflow: hidden;
    position: relative;
}
.carousel-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.carousel-card:hover .carousel-img {
    transform: scale(1.08);
}
.carousel-card-body {
    padding: 24px;
}
.carousel-card-body h4 {
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 8px;
}
.carousel-meta {
    font-size: 0.85rem;
    color: var(--color-body-gray);
    display: flex;
    gap: 12px;
}
.carousel-meta span i {
    color: var(--color-primary);
    margin-right: 4px;
}

/* --- Blueprint CTA Section --- */
.blueprint-cta {
    background-image: linear-gradient(rgba(11, 15, 25, 0.9), rgba(11, 15, 25, 0.95)), url('../images/aboutus.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    text-align: center;
}
.cta-box {
    max-width: 750px;
    margin: 0 auto;
}
.cta-box h2 {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-dark-text);
    margin-bottom: 24px;
}
.cta-box p {
    font-size: 1.2rem;
    color: var(--color-body-dark-gray);
    margin-bottom: 40px;
}

/* --- Corporate Profile About Page --- */
.page-title-banner {
    padding: 140px 0 100px;
    background-image: linear-gradient(rgba(11, 15, 25, 0.8), rgba(11, 15, 25, 0.85)), url('../images/pagetitle-row.png');
    background-size: cover;
    background-position: center;
    color: var(--color-dark-text);
    text-align: center;
}
.banner-title {
    font-size: 3.75rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -1px;
    margin-bottom: 16px;
}
.breadcrumb {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}
.breadcrumb a {
    color: var(--color-primary);
}
.breadcrumb .separator {
    opacity: 0.4;
}

/* Milestone Roadmap Timeline */
.milestones-timeline {
    position: relative;
    max-width: 900px;
    margin: 60px auto 0;
    padding: 20px 0;
}
.milestones-timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--color-border);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    border-radius: var(--radius-full);
}
.timeline-card {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}
.timeline-card::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--color-light-bg);
    border: 4px solid var(--color-primary);
    top: 25px;
    border-radius: 50%;
    z-index: 1;
}
.timeline-left {
    left: 0;
}
.timeline-right {
    left: 50%;
}
.timeline-right::after {
    left: -10px;
}
.timeline-inner {
    padding: 30px;
    background: var(--color-light-card);
    border: 1px solid var(--color-border);
    position: relative;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-subtle);
}
.timeline-year {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: 8px;
    display: block;
}
.timeline-inner h3 {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.timeline-inner p {
    font-size: 0.95rem;
    color: var(--color-body-gray);
    margin: 0;
}

@media (max-width: 768px) {
    .milestones-timeline::after {
        left: 31px;
    }
    .timeline-card {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    .timeline-card::after {
        left: 21px;
        right: auto;
    }
    .timeline-right {
        left: 0%;
    }
}

/* Six Rules Timeline Grid */
.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}
.rule-item {
    background: var(--color-dark-card);
    border: 1px solid var(--color-border-dark);
    padding: 36px;
    border-radius: var(--radius-md);
    position: relative;
}
.rule-num {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 16px;
}
.rule-item p {
    font-size: 1rem;
    color: var(--color-body-dark-gray);
}

/* Safety Standards Section */
.safety-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}
.safety-list {
    list-style: none;
    margin-top: 24px;
}
.safety-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.05rem;
    margin-bottom: 20px;
    color: var(--color-light-text);
}
.safety-list li i {
    color: var(--color-primary);
    font-size: 1.3rem;
}
.safety-image {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-height: 480px;
    object-fit: cover;
}

@media (max-width: 991px) {
    .safety-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* --- Projects Page Portfolio --- */
.portfolio-tab-bar {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 50px;
}
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}
.project-card {
    background: var(--color-light-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
    transition: all var(--transition-normal);
    position: relative;
    cursor: pointer;
}
.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}
.project-card h3 a::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
}
.project-img-wrap {
    height: 260px;
    overflow: hidden;
    position: relative;
}
.project-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.project-card:hover .project-thumbnail {
    transform: scale(1.08);
}
.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(11, 15, 25, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}
.project-card:hover .project-overlay {
    opacity: 1;
}
.project-view-btn,
.project-link-btn {
    width: 52px;
    height: 52px;
    background-color: var(--color-primary);
    color: #000000;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    transform: scale(0.8);
    transition: all var(--transition-normal);
}
.project-card:hover .project-view-btn,
.project-card:hover .project-link-btn {
    transform: scale(1);
}
.project-body {
    padding: 24px;
}
.project-tag {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 0.75rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 8px;
    display: block;
}
.project-body h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.project-meta-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--color-body-gray);
    border-top: 1px solid var(--color-border);
    padding-top: 14px;
}
.project-meta-row span i {
    color: var(--color-primary);
    margin-right: 4px;
}

/* --- Fullscreen Lightbox Overlay --- */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(11, 15, 25, 0.98);
    z-index: 2500;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
    overflow: hidden;
}
.lightbox-overlay.active {
    display: flex;
    opacity: 1;
}
.lightbox-content-wrap {
    width: 100%;
    max-width: 90%;
    max-height: 80vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.lightbox-img {
    max-width: 100%;
    max-height: 80vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-xl);
}
.lightbox-close {
    position: absolute;
    top: 30px;
    right: 30px;
    background: transparent;
    border: none;
    color: var(--color-dark-text);
    font-size: 3rem;
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition-fast);
    z-index: 2510;
}
.lightbox-close:hover {
    color: var(--color-primary);
}
.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-dark-text);
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    transition: all var(--transition-fast);
    z-index: 2510;
}
.lightbox-nav:hover {
    background-color: var(--color-primary);
    color: #000000;
}
.lightbox-prev { left: 40px; }
.lightbox-next { right: 40px; }

@media (max-width: 768px) {
    .lightbox-nav {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
        background: rgba(0, 0, 0, 0.6);
        border: none;
        display: flex;
    }
    .lightbox-prev { left: 10px; }
    .lightbox-next { right: 10px; }
    .lightbox-close {
        top: 15px;
        right: 15px;
        font-size: 2.2rem;
    }
    .lightbox-content-wrap {
        max-width: 95%;
        max-height: 70vh;
    }
    .lightbox-img {
        max-height: 70vh;
    }
}

/* --- Contact Page Center --- */
.contact-detail-card {
    display: flex;
    gap: 20px;
    background: var(--color-light-card);
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--color-border);
    margin-bottom: 24px;
}
.contact-icon-wrapper {
    width: 52px;
    height: 52px;
    background: rgba(255, 178, 0, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}
.contact-detail-card h4 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 6px;
}
.contact-detail-card p {
    font-size: 0.95rem;
    color: var(--color-body-gray);
    margin: 0;
}
.contact-detail-card p a:hover {
    color: var(--color-primary-hover);
}

.contact-form-panel {
    background: var(--color-light-card);
    border: 1px solid var(--color-border);
    padding: 48px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}
.contact-form-panel h3 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 24px;
}
.form-group {
    margin-bottom: 24px;
}
.form-control {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-light-bg);
    color: var(--color-light-text);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-light-card);
    box-shadow: 0 0 0 3px rgba(255, 178, 0, 0.15);
}
textarea.form-control {
    resize: vertical;
    min-height: 120px;
}
.recaptcha-box {
    margin: 24px 0;
    display: flex;
}

/* Mail response messages */
.form-message {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    font-weight: 600;
    font-size: 0.95rem;
}
.form-message.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}
.form-message.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

@media (max-width: 768px) {
    .contact-form-panel { padding: 30px 20px; }
}

/* Map frame configuration */
.map-frame {
    width: 100%;
    height: 450px;
    border: 0;
    display: block;
}

/* --- Footer styles & animations --- */
.main-footer-section {
    background-color: var(--color-dark-bg);
    color: var(--color-body-dark-gray);
    padding-top: 80px;
    border-top: 4px solid var(--color-primary);
    overflow: hidden; /* Prevent horizontal scrollbars from moving trucks */
}
.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px 0 48px; /* Extra left padding */
}
.footer-column h3.footer-title {
    color: var(--color-dark-text);
    font-size: 1.25rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 8px;
    display: inline-block;
}
.footer-desc {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
}
.social-links {
    display: flex;
    gap: 12px;
}
.social-icon-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--color-dark-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}
.social-icon-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #000000;
    transform: translateY(-3px);
}

.footer-nav-list {
    list-style: none;
}
.footer-nav-list li {
    margin-bottom: 12px;
    font-size: 0.95rem;
}
.footer-nav-list li a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-body-dark-gray);
    transition: all var(--transition-fast);
}
.footer-nav-list li a i {
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}
.footer-nav-list li a:hover {
    color: var(--color-primary);
    padding-left: 6px;
}
.footer-nav-list li a:hover i {
    transform: translateX(4px);
}

.hours-list, .contact-list {
    list-style: none;
}
.hours-item, .contact-item {
    margin-bottom: 16px;
    font-size: 0.95rem;
}
.hours-item .days {
    display: block;
    font-weight: 700;
    color: var(--color-dark-text);
    margin-bottom: 4px;
}
.hours-item .time {
    color: var(--color-primary);
    font-weight: 600;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.contact-item i {
    color: var(--color-primary);
    font-size: 1.1rem;
    margin-top: 4px;
    flex-shrink: 0;
}
.contact-item a:hover {
    color: var(--color-primary-hover);
}

.footer-bottom {
    position: relative;
    background-color: rgba(0, 0, 0, 0.3);
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}
/* Moving trucks */
.footer-bottom::before {
    background-image: url('../images/fuel-truck.png');
    background-repeat: no-repeat;
    background-position: right bottom;
    background-size: contain;
    position: absolute;
    width: 80px;
    height: 80px;
    right: -100px;
    top: -68px; /* Ride above copyright line */
    animation: running-anim 28s linear infinite;
    content: '';
    z-index: 10;
    pointer-events: none;
}
.footer-bottom::after {
    background-image: url('../images/crane-truck.png');
    background-repeat: no-repeat;
    background-position: right bottom;
    background-size: contain;
    position: absolute;
    width: 85px;
    height: 85px;
    left: -100px;
    top: -72px; /* Ride above copyright line */
    animation: running-anim-left 42s linear infinite;
    content: '';
    z-index: 10;
    pointer-events: none;
}

@keyframes running-anim {
    0% { right: -15%; }
    100% { right: 115%; }
}
@keyframes running-anim-left {
    0% { left: -15%; }
    100% { left: 115%; }
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    position: relative;
    z-index: 15;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px 0 48px; /* Aligns with column grid */
}
.copyright-text a:hover {
    color: var(--color-primary);
}

@media (max-width: 991px) {
    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
        padding-left: 24px;
    }
    .footer-bottom-container {
        flex-direction: column;
        gap: 12px;
        text-align: center;
        padding-left: 24px;
    }
}

/* --- Scroll reveal observer states --- */
.animate-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
    pointer-events: none; /* Disable interaction while invisible */
}
.animate-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto; /* Enable interaction once visible */
}

.delay-100 { transition-delay: 0.1s !important; }
.delay-200 { transition-delay: 0.2s !important; }
.delay-300 { transition-delay: 0.3s !important; }
.delay-400 { transition-delay: 0.4s !important; }
.delay-500 { transition-delay: 0.5s !important; }

/* --- Project Details Page --- */
.project-details-grid {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 48px;
    align-items: start;
}
.project-details-sidebar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.sidebar-info-card {
    background-color: var(--color-dark-card);
    color: var(--color-dark-text);
    padding: 36px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-dark);
}
.sidebar-info-card h3 {
    color: var(--color-dark-text);
    font-size: 1.3rem;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 12px;
}
.stats-list {
    list-style: none;
}
.stats-list li {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
    font-size: 0.95rem;
}
.stats-list li:last-child {
    margin-bottom: 0;
}
.stats-list li .label {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-body-dark-gray);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}
.stats-list li .label i {
    color: var(--color-primary);
}
.stats-list li .value {
    font-weight: 600;
    color: var(--color-dark-text);
    font-size: 1.05rem;
}
.sidebar-contact-card {
    background-color: var(--color-light-card);
    border: 1px solid var(--color-border);
    padding: 36px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}
.sidebar-contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 12px;
}
.sidebar-contact-card p {
    font-size: 0.9rem;
    color: var(--color-body-gray);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.sidebar-contact-card p:last-child {
    margin-bottom: 0;
}
.sidebar-contact-card p i {
    color: var(--color-primary);
    font-size: 1.1rem;
}
.project-details-body {
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.project-description-card {
    background-color: var(--color-light-card);
    border: 1px solid var(--color-border);
    padding: 48px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-subtle);
}
.project-description-card h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--color-light-text);
}
.project-long-desc p {
    font-size: 1.05rem;
    color: var(--color-body-gray);
    line-height: 1.8;
}
.project-highlight-img-wrap {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-height: 500px;
}
.highlight-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.project-gallery-section {
    margin-top: 20px;
}
.gallery-section-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--color-light-text);
}
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}
.gallery-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
    aspect-ratio: 4/3;
    position: relative;
}
.gallery-lightbox-link {
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
}
.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.gallery-item:hover .gallery-img {
    transform: scale(1.08);
}
.gallery-hover-overlay {
    position: absolute;
    inset: 0;
    background: rgba(11, 15, 25, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    color: #ffffff;
    font-size: 1.5rem;
    transition: opacity var(--transition-normal);
}
.gallery-item:hover .gallery-hover-overlay {
    opacity: 1;
}
.details-footer-actions {
    border-top: 1px solid var(--color-border);
    padding-top: 30px;
}
@media (max-width: 991px) {
    .project-details-grid {
        grid-template-columns: 1fr;
    }
    .project-description-card {
        padding: 30px 20px;
    }
}