/* ========================================================================
   RS Quantity Surveying - Shared Styles v3
   Precision Engineering Aesthetic - Dual Mode / Orange Accent / Outfit
   ======================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
    --col-bg: #FAFAF8;
    --col-surface: #FFFFFF;
    --col-ink: #1A1A1A;
    --col-body: #3D3D3D;
    --col-muted: #7A7A76;
    --col-border: #E2E2DE;
    --col-border-strong: #C8C8C4;
    --col-accent: #E85D04;
    --col-accent-hover: #C94E03;
    --col-accent-light: #FFF3EA;
    --col-accent-subtle: rgba(232, 93, 4, 0.08);
    --col-dark-bg: #0F1114;
    --col-dark-surface: #181B20;
    --col-dark-border: #2A2D32;
    --col-dark-muted: #8A8A86;
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
    --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --radius-card: 12px;
    --radius-sm: 6px;
    --radius-badge: 4px;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --transition-fast: 180ms var(--ease-out-expo);
    --transition-base: 280ms var(--ease-out-expo);
    --transition-slow: 600ms var(--ease-out-expo);
}

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

html {
    scroll-behavior: smooth;
    font-family: var(--font-body);
    background-color: var(--col-bg);
    color: var(--col-ink);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--col-bg);
    color: var(--col-ink);
    overflow-x: hidden;
    line-height: 1.6;
    font-family: var(--font-body);
    margin: 0;
}

/* --- Typography - Outfit --- */
h1, h2, h3, h4, h5, h6, .font-heading {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.05;
    text-wrap: balance;
    color: var(--col-ink);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.875rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.625rem); font-weight: 600; }

p {
    text-wrap: pretty;
    color: var(--col-body);
    font-family: var(--font-body);
    line-height: 1.7;
}

/* Monospace for BIM metrics, data labels */
.font-mono-data, code, kbd {
    font-family: var(--font-mono) !important;
    letter-spacing: -0.01em;
}

kbd {
    border: 1px solid var(--col-border);
    border-radius: var(--radius-badge);
    background: var(--col-bg);
    padding: 2px 6px;
    font-size: 0.82em;
    color: var(--col-ink);
}

/* --- Card Architecture --- */
.bento-card {
    background: var(--col-surface);
    border: 1px solid var(--col-border);
    border-radius: var(--radius-card);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    overflow: hidden;
}

.bento-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);
    border-color: var(--col-border-strong);
}

/* Accent tinted bento card */
.bento-card-accent {
    background: var(--col-accent);
    border: none;
    border-radius: var(--radius-card);
    overflow: hidden;
    color: #fff;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.bento-card-accent:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(232, 93, 4, 0.25);
}

/* Dark ink bento card */
.bento-card-ink {
    background: var(--col-dark-bg);
    border: 1px solid var(--col-dark-border);
    border-radius: var(--radius-card);
    overflow: hidden;
    color: #fff;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.bento-card-ink:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* --- Buttons --- */
.btn-primary {
    background-color: var(--col-accent);
    color: #FFFFFF;
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    font-weight: 600;
    font-size: 0.875rem;
    font-family: var(--font-body);
    letter-spacing: -0.01em;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    cursor: pointer;
    white-space: nowrap;
    border: none;
}

.btn-primary:hover {
    background-color: var(--col-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(232, 93, 4, 0.3);
}

.btn-primary:active {
    transform: scale(0.98) translateY(0);
    box-shadow: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--col-ink);
    border: 1px solid var(--col-border);
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    font-weight: 600;
    font-size: 0.875rem;
    font-family: var(--font-body);
    letter-spacing: -0.01em;
    transition: background-color var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
}

.btn-secondary:hover {
    background-color: var(--col-bg);
    border-color: var(--col-border-strong);
    transform: translateY(-1px);
}

.btn-secondary:active {
    transform: scale(0.98);
}

/* Ghost button for dark sections */
.btn-ghost-light {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.18);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    font-weight: 600;
    font-size: 0.875rem;
    font-family: var(--font-body);
    letter-spacing: -0.01em;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
}

.btn-ghost-light:hover {
    background: rgba(255,255,255,0.14);
    border-color: rgba(255,255,255,0.3);
    transform: translateY(-1px);
}

/* --- Tags & Status Badges --- */
.tag-pale-red { background-color: #FDECEA; color: #9B2A2A; }
.tag-pale-blue { background-color: #EBF3FD; color: #1D5FA8; }
.tag-pale-green { background-color: #EBF5EE; color: #1D6433; }
.tag-pale-yellow { background-color: #FDF6E3; color: #8A6200; }
.tag-pale-orange { background-color: var(--col-accent-light); color: var(--col-accent); }

.badge-base {
    border-radius: var(--radius-badge);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 4px 10px;
    font-weight: 600;
    font-family: var(--font-mono);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    line-height: 1;
}

/* --- Divider rows (service list style) --- */
.service-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    padding: 1.75rem 0;
    border-bottom: 1px solid var(--col-border);
    align-items: start;
    transition: background-color var(--transition-base);
}

.service-row:first-child {
    border-top: 1px solid var(--col-border);
}

.service-row:hover {
    background-color: rgba(0, 0, 0, 0.015);
}

/* --- Scroll Reveal & Micro-Animations --- */
/* Only elements the observer actually watches may start hidden.
   `.reveal-stagger > *` used to be in this list, which faded EVERY direct
   child of a stagger container to zero -- including children with no reveal
   class. Those were never observed, so they never received `.visible` and
   stayed invisible permanently while still occupying layout space. That is
   what hid the Clash Detection and Bank-Grade Security cards. */
.reveal, .reveal-left, .reveal-right {
    opacity: 0;
    will-change: transform, opacity;
}

.reveal {
    transform: translateY(20px);
    transition: opacity 800ms var(--ease-out-expo), transform 800ms var(--ease-out-expo);
}

.reveal-left {
    transform: translateX(-20px);
    transition: opacity 800ms var(--ease-out-expo), transform 800ms var(--ease-out-expo);
}

.reveal-right {
    transform: translateX(20px);
    transition: opacity 800ms var(--ease-out-expo), transform 800ms var(--ease-out-expo);
}

.reveal.visible,
.reveal-left.visible,
.reveal-right.visible,
.reveal-stagger > *.visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* Stagger delay for children */
.reveal-stagger > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > *:nth-child(2) { transition-delay: 100ms; }
.reveal-stagger > *:nth-child(3) { transition-delay: 200ms; }
.reveal-stagger > *:nth-child(4) { transition-delay: 300ms; }
.reveal-stagger > *:nth-child(5) { transition-delay: 400ms; }
.reveal-stagger > *:nth-child(6) { transition-delay: 500ms; }

/* Page Entry */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

.page-enter {
    animation: fadeInUp 900ms var(--ease-out-expo) forwards;
}

/* Reduced motion override */
@media (prefers-reduced-motion: reduce) {
    .reveal, .reveal-left, .reveal-right, .reveal-stagger > * {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .page-enter { animation: none; }
    .animate-marquee, .animate-marquee-quad { animation: none; }
}

/* --- Mobile Navigation Drawer --- */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(15, 17, 20, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: opacity 300ms ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.mobile-menu-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100dvh;
    background-color: var(--col-surface);
    border-left: 1px solid var(--col-border);
    z-index: 100;
    transform: translateX(100%);
    transition: transform 400ms var(--ease-out-expo);
    display: flex;
    flex-direction: column;
    padding: 28px 24px;
    box-shadow: -12px 0 48px rgba(0, 0, 0, 0.08);
}

.mobile-menu-drawer.active {
    transform: translateX(0);
}

.mobile-menu-drawer .mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 0;
    font-size: 15px;
    font-weight: 500;
    color: var(--col-body);
    text-decoration: none;
    border-bottom: 1px solid var(--col-border);
    transition: color var(--transition-fast);
    font-family: var(--font-body);
}

.mobile-menu-drawer .mobile-nav-link:hover,
.mobile-menu-drawer .mobile-nav-link.active {
    color: var(--col-ink);
    font-weight: 600;
}

.mobile-menu-drawer .mobile-close-btn {
    align-self: flex-end;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--col-ink);
    padding: 6px;
    margin-bottom: 20px;
}

/* --- Top Navigation --- */
/* --- Top Navigation --- */
.site-nav {
    transition: background-color 250ms cubic-bezier(0.16, 1, 0.3, 1),
                border-color 250ms cubic-bezier(0.16, 1, 0.3, 1),
                backdrop-filter 250ms cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base nav link */
.nav-link {
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast), opacity var(--transition-fast);
    position: relative;
    text-decoration: none;
    letter-spacing: -0.01em;
}

/* Nav on dark hero background */
.nav-transparent {
    background-color: transparent !important;
    border-bottom: 1px solid transparent !important;
}

.nav-transparent .nav-logo-light {
    display: block !important;
}

.nav-transparent .nav-logo-dark {
    display: none !important;
}

.nav-transparent .nav-link {
    color: #FFFFFF !important;
    opacity: 0.88;
}

.nav-transparent .nav-link:hover {
    color: #FFFFFF !important;
    opacity: 1;
}

.nav-transparent .nav-link-active {
    color: #FFFFFF !important;
    opacity: 1 !important;
    font-weight: 600 !important;
}

.nav-transparent .nav-link-active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--col-accent);
    border-radius: 1px;
}

.nav-transparent .mobile-toggle-btn {
    color: #FFFFFF !important;
}

/* Nav when scrolled over light content */
.nav-scrolled {
    background-color: rgba(250, 250, 248, 0.94) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--col-border) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.nav-scrolled .nav-logo-light {
    display: none !important;
}

.nav-scrolled .nav-logo-dark {
    display: block !important;
}

.nav-scrolled .nav-link {
    color: var(--col-body) !important;
    opacity: 1;
}

.nav-scrolled .nav-link:hover {
    color: var(--col-ink) !important;
}

.nav-scrolled .nav-link-active {
    color: var(--col-ink) !important;
    opacity: 1 !important;
    font-weight: 600 !important;
}

.nav-scrolled .nav-link-active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--col-accent);
    border-radius: 1px;
}

.nav-scrolled .mobile-toggle-btn {
    color: var(--col-ink) !important;
}

/* --- Scroll-to-Top Button --- */
.scroll-top-btn {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 44px;
    height: 44px;
    background-color: var(--col-surface);
    color: var(--col-ink);
    border: 1px solid var(--col-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 80;
    opacity: 0;
    transform: translateY(20px);
    transition: all 400ms var(--ease-out-expo);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.scroll-top-btn.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-top-btn:hover {
    background-color: var(--col-ink);
    color: #fff;
    border-color: var(--col-ink);
    transform: translateY(-2px);
}

/* --- Custom Range Slider (ROI Calculator) --- */
.slider-thumb-custom {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 3px;
    background: var(--col-border);
    border-radius: 2px;
    outline: none;
    margin: 24px 0;
    cursor: pointer;
}

.slider-thumb-custom::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--col-accent);
    cursor: pointer;
    border: 3px solid var(--col-surface);
    box-shadow: 0 0 0 1px var(--col-accent), 0 2px 8px rgba(232, 93, 4, 0.3);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.slider-thumb-custom::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 0 0 1px var(--col-accent), 0 4px 16px rgba(232, 93, 4, 0.4);
}

.slider-thumb-custom::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--col-accent);
    cursor: pointer;
    border: 3px solid var(--col-surface);
    box-shadow: 0 0 0 1px var(--col-accent), 0 2px 8px rgba(232, 93, 4, 0.3);
}

/* --- Tab System --- */
.tab-btn {
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    color: var(--col-muted);
    font-family: var(--font-body);
    border-radius: 0;
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    padding: 12px 18px;
    background: none;
    cursor: pointer;
    border-top: none;
    border-left: none;
    border-right: none;
}

.tab-btn.active {
    color: var(--col-ink) !important;
    border-bottom-color: var(--col-accent);
    font-weight: 600;
}

.tab-btn:hover:not(.active) {
    color: var(--col-body);
}

.tab-pane {
    display: none;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 500ms ease, transform 500ms ease;
}

.tab-pane.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* --- Testimonial Carousel --- */
.testimonial-slide {
    display: none;
    opacity: 0;
    transition: opacity 700ms var(--ease-out-expo);
}

.testimonial-slide.active {
    display: block;
    opacity: 1;
}

.carousel-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--col-border);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot.active {
    background-color: var(--col-accent);
    width: 20px;
    border-radius: 3px;
}

/* --- Seamless Logo Marquee --- */
.animate-marquee {
    animation: marquee 32s linear infinite;
}
.animate-marquee-quad {
    animation: marquee-quad 44s linear infinite;
}

@keyframes marquee {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@keyframes marquee-quad {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-25%); }
}

/* --- Credential Cards --- */
.credential-card {
    padding: 1.75rem;
    background: var(--col-surface);
    border: 1px solid var(--col-border);
    border-radius: var(--radius-card);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    position: relative;
    overflow: hidden;
}

.credential-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--col-accent);
}

.credential-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

/* --- Hero image container --- */
.hero-image-container {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-card);
}

.hero-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 800ms var(--ease-out-expo);
}

.hero-image-container:hover img {
    transform: scale(1.03);
}

/* --- Form styles --- */
.form-input {
    background: var(--col-bg);
    border: 1px solid var(--col-border);
    border-radius: var(--radius-sm);
    padding: 13px 16px;
    font-size: 0.875rem;
    font-family: var(--font-body);
    color: var(--col-ink);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
    width: 100%;
}

.form-input:focus {
    border-color: var(--col-accent);
    box-shadow: 0 0 0 3px rgba(232, 93, 4, 0.1);
}

.form-input::placeholder {
    color: var(--col-muted);
}

.form-input.invalid {
    border-color: #dc2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--col-body);
    font-weight: 600;
    display: block;
    margin-bottom: 6px;
}

.form-error {
    font-size: 0.75rem;
    color: #dc2626;
    margin-top: 4px;
    display: none;
}

.form-error.show {
    display: block;
}

/* --- Dark sections (CTA, hero) --- */
.section-dark {
    background: var(--col-dark-bg);
    color: #F0F0EC;
}

.section-dark h1, .section-dark h2, .section-dark h3 { color: #F0F0EC; }
.section-dark p { color: rgba(240, 240, 236, 0.55); }

/* --- Mobile toggle button --- */
.mobile-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.mobile-toggle-btn:hover {
    background-color: rgba(255,255,255,0.1);
}

/* --- Project card overlay --- */
.project-card-link {
    display: block;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-card);
    text-decoration: none;
}

.project-card-link .project-img {
    transition: transform 700ms var(--ease-out-expo);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-card-link:hover .project-img {
    transform: scale(1.04);
}

/* --- Scroll Progress Bar --- */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background: var(--col-accent);
    z-index: 999;
    width: 0%;
    transition: width 100ms linear;
}

/* --- Counter animation --- */
@keyframes countUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.counter-animate {
    animation: countUp 600ms var(--ease-out-expo) forwards;
}

/* --- Responsive overrides --- */
@media (max-width: 767px) {
    .service-row {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}

/* --- Selection --- */
::selection {
    background: var(--col-accent);
    color: white;
}


/* --- noscript-reveal-fallback -------------------------------------------
   .reveal starts at opacity:0 and waits for IntersectionObserver. If the
   script fails to load or run, that content would never appear. This makes
   the page fully readable without JavaScript. */
.no-js .reveal,
.no-js .reveal-left,
.no-js .reveal-right,
.no-js .reveal-stagger > * {
    opacity: 1 !important;
    transform: none !important;
}