:root {
    --navy-950: #0a1826;
    --navy-900: #0D1F30;
    --navy-800: #132a3f;
    --ice-400: #5fa8d3;
    --orange-500: #ff6a00;
    --orange-600: #e85d00;
    --paper-100: #f4f7fa;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
}

a {
    text-decoration: none;
}

/* ---------- Topbar ---------- */
.topbar {
    background: var(--navy-900);
    color: var(--paper-100);
    font-size: 14px;
    padding: 15px 0;
    border-bottom: 1px solid rgba(244, 247, 250, .08);
}

/* display, alignment, wrap, gap-2, and reset spacing are handled by
           bootstrap utility classes (d-flex align-items-center flex-wrap
           m-0 p-0) applied directly on the <ul>/<li> markup */
.topbar-contact-info ul {
    list-style: none;
    gap: 1.75rem;
}

.topbar-contact-info li {
    color: #fff;
}

.topbar-contact-info i {
    color: var(--paper-100);
    font-size: .85rem;
}

.topbar-contact-info span {
    font-weight: 600;
    color: #fff;
}

.topbar-contact-info a {
    color: #fff;
    text-decoration: none;
}

.topbar-contact-info a:hover {
    color: var(--orange-500);
}

/* display, alignment, justify-content-end, gap-3, and reset spacing
           are handled by bootstrap utility classes applied on the <ul> */
.topbar-social-icons ul {
    list-style: none;
}

.topbar-social-icons a {
    color: rgba(244, 247, 250, .85);
    text-decoration: none;
    font-size: .78rem;
    transition: background .2s ease, border-color .2s ease, color .2s ease;
}



/* ---------- Navbar ---------- */
.zenith-navbar {
    background: #fff;
    padding: 25px 0;
    box-shadow: 0 2px 18px rgba(10, 24, 38, .06);
}

/* display/align-items/margin come from bootstrap utility classes on the element */
.navbar-brand {
    gap: .55rem;
}

.navbar-brand img {
    height: 34px;
}

.navbar-nav .nav-link {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    font-size: .95rem;
    color: var(--navy-950) !important;
    padding: .6rem 1rem !important;
    position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--orange-500) !important;
}

.dropdown-menu {
    border: none;
    border-radius: 10px;
    box-shadow: 0 12px 30px rgba(10, 24, 38, .14);
    padding: .5rem;
    margin-top: .5rem;
}

.dropdown-item {
    font-family: 'Inter', sans-serif;
    font-size: .9rem;
    color: var(--navy-950);
    border-radius: 6px;
    padding: .55rem .75rem;
}

.dropdown-item:hover {
    background: rgba(255, 106, 0, .08);
    color: var(--orange-600);
}

.navbar-toggler {
    border: 1px solid rgba(10, 24, 38, .15) !important;
    padding: .4rem .6rem;
}

.navbar-toggler i {
    color: var(--navy-950);
    font-size: 1.1rem;
}

/* align-items comes from the align-items-center utility class on the element */
.zenith-cta {
    position: relative;
    display: inline-flex;
    gap: .6rem;
    font-family: 'Space Grotesk', sans-serif;
    font-size: .85rem;
    font-weight: 600;
    letter-spacing: .06em;
    line-height: 1em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--orange-500), var(--orange-600));
    color: #fff;
    padding: 1rem 1.9rem 1rem 1.5rem;
    border: none;
    box-shadow: 0 10px 24px -8px rgba(255, 106, 0, .55);
    overflow: hidden;
    transition: box-shadow .3s ease, transform .3s ease;
    z-index: 1;
}

.zenith-cta i {
    font-size: .8rem;
}

.zenith-cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, .16);
    transform: translateX(-100%);
    transition: transform .35s ease;
    z-index: -1;
}

.zenith-cta:hover,
.zenith-cta:focus-visible {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 14px 30px -8px rgba(255, 106, 0, .65);
}

.zenith-cta:hover::before,
.zenith-cta:focus-visible::before {
    transform: translateX(0);
}

.zenith-cta:focus-visible {
    outline: 2px solid var(--navy-950);
    outline-offset: 3px;
}

.hvac-hero {
    position: relative;
    font-family: 'Inter', sans-serif;
    color: var(--paper-100);
    background: var(--navy-950);
}

.hvac-hero .swiper {
    width: 100%;
}

.hvac-slide {
    position: relative;
    min-height: 640px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hvac-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hvac-bg-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background:
        repeating-linear-gradient(135deg, rgba(244, 247, 250, .05) 0 2px, transparent 2px 14px),
        linear-gradient(120deg, var(--navy-800), var(--navy-950));
    border: 1px dashed rgba(244, 247, 250, .25);
}

.hvac-bg-placeholder span {
    font-family: 'Space Grotesk', sans-serif;
    font-size: .8rem;
    letter-spacing: .05em;
    color: rgba(244, 247, 250, .55);
    max-width: 280px;
    line-height: 1.5;
}

.hvac-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg,
            rgba(10, 24, 38, .92) 0%,
            rgba(10, 24, 38, .82) 32%,
            rgba(10, 24, 38, .35) 58%,
            rgba(10, 24, 38, .05) 78%);
}

.hvac-slide-inner {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 64px 0;
}

.hvac-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    font-family: 'Space Grotesk', sans-serif;
    font-size: .85rem;
    font-weight: 500;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ice-400);
    margin-bottom: 1.15rem;
    opacity: 0;
    transform: translateY(14px);
}

.hvac-eyebrow::before {
    content: "";
    width: 26px;
    height: 2px;
    background: var(--orange-500);
    display: inline-block;
}

.hvac-headline {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    line-height: 1.04;
    font-size: clamp(2.25rem, 4.6vw, 3.75rem);
    max-width: 13ch;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(18px);
}

.hvac-subtext {
    font-size: 1.02rem;
    color: rgba(244, 247, 250, .78);
    max-width: 44ch;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(18px);
}

/* display/align-items come from bootstrap utility classes on the element */
.hvac-cta-row {
    gap: 1.75rem;
    opacity: 0;
    transform: translateY(18px);
}

/* the hero's primary CTA reuses .btn-diagonal (shared with the FAQ
           CTA below); it adds uppercase + tracking, which the FAQ CTA
           doesn't need since its label is already short and title-case */
.hvac-hero .btn-diagonal {
    letter-spacing: .08em;
    text-transform: uppercase;
}

.hvac-cta-secondary {
    font-family: 'Space Grotesk', sans-serif;
    font-size: .85rem;
    font-weight: 500;
    letter-spacing: .05em;
    color: var(--paper-100);
    text-decoration: none;
    border-bottom: 1px solid rgba(244, 247, 250, .35);
    padding-bottom: 2px;
    transition: border-color .2s ease, color .2s ease;
}

.hvac-cta-secondary:hover {
    color: var(--ice-400);
    border-color: var(--ice-400);
}

.swiper-slide-active .hvac-eyebrow,
.swiper-slide-active .hvac-headline,
.swiper-slide-active .hvac-subtext,
.swiper-slide-active .hvac-cta-row {
    animation: hvacRise .7s cubic-bezier(.2, .7, .2, 1) forwards;
}

.swiper-slide-active .hvac-headline {
    animation-delay: .08s;
}

.swiper-slide-active .hvac-subtext {
    animation-delay: .16s;
}

.swiper-slide-active .hvac-cta-row {
    animation-delay: .24s;
}

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

.hvac-hero .btn-diagonal:focus-visible,
.hvac-cta-secondary:focus-visible {
    outline: 2px solid var(--ice-400);
    outline-offset: 3px;
}

.why-banner {
    position: relative;
    background: linear-gradient(120deg, var(--navy-950) 0%, var(--navy-800) 100%);
    overflow: hidden;
    padding: 56px 0;
}

.why-banner .container {
    position: relative;
    z-index: 1;
}

.why-item {
    padding: 4px 0 4px 40px;
    border-left: 1px solid rgba(244, 247, 250, .14);
    height: 100%;
}

.why-col:first-child .why-item {
    border-left: none;
    padding-left: 4px;
}

.why-item-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 106, 0, .14);
    clip-path: polygon(0 0, 100% 0, 76% 100%, 0% 100%);
    transition: background .3s ease, transform .3s ease;
}

.why-item:hover .why-item-icon {
    background: var(--orange-500);
    transform: translateY(-2px);
}

.why-item-icon i {
    font-size: 1.75rem;
    color: var(--orange-500);
    transition: color .3s ease;
}

.why-item:hover .why-item-icon i {
    color: #fff;
}

.why-item-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 1.2rem;
    color: #fff;
    margin: 2px 0 8px;
}

.why-item-desc {
    font-size: .92rem;
    line-height: 1.6;
    color: rgba(244, 247, 250, .68);
    margin: 0;
    max-width: 30ch;
}

#services {
    padding: 100px 0;
}

/* ---------- Shared "chip" eyebrow, reused across sections ---------- */
.section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-family: 'Space Grotesk', sans-serif;
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--navy-950);
    background: #fff;
    border: 1px solid rgba(10, 24, 38, .12);
    border-radius: 100px;
    padding: .45rem 1rem;
    margin-bottom: 1.25rem;
}

.section-eyebrow .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--orange-500);
    display: inline-block;
}

/* Shared headline treatment reused by services, projects, and
           contact section headers — each section-specific class below only
           overrides what's genuinely different (max-width, margin). */
.section-headline {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(1.85rem, 3.2vw, 2.5rem);
    line-height: 1.18;
    color: var(--navy-950);
    margin: 0;
}

.services-intro {
    font-size: .92rem;
    line-height: 1.7;
    color: #5b6b7a;
    margin: 0;
}

.services-header-divider {
    border: none;
    border-top: 1px solid rgba(10, 24, 38, .1);
    margin: 40px 0 44px;
}

.services-accordion .accordion-item {
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(10, 24, 38, .1);
}

.services-accordion .accordion-item:first-of-type,
.services-accordion .accordion-item:last-of-type {
    border-radius: 0;
}

.services-accordion .accordion-header {
    margin: 0;
}

.service-toggle {
    display: flex;
    align-items: center;
    gap: 22px;
    width: 100%;
    background: none;
    border: none;
    padding: 22px 4px;
    cursor: pointer;
    text-align: left;
    text-decoration: none;
}

.service-num {
    font-weight: 700;
    font-size: 1.6rem;
    color: rgba(10, 24, 38, .22);
    min-width: 42px;
    transition: color .3s ease;
}

.service-title {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--navy-950);
    flex: 1;
    transition: color .3s ease;
}

.service-arrow {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(10, 24, 38, .35);
    background: transparent;
    transform: rotate(-45deg);
    transition: background .3s ease, color .3s ease, transform .3s ease;
}

.service-arrow i {
    font-size: 1.2rem;
}

.service-toggle[aria-expanded="true"] .service-num {
    color: var(--orange-500);
}

.service-toggle[aria-expanded="true"] .service-title {
    color: var(--orange-600);
}

.service-toggle[aria-expanded="true"] .service-arrow {
    color: var(--orange-500);
    transform: rotate(0deg);
}

.service-toggle:hover .service-title {
    color: var(--orange-600);
}

.service-toggle:focus-visible {
    outline: 2px solid var(--ice-400);
    outline-offset: 2px;
}

.services-accordion .accordion-body {
    padding: 0 4px 20px 64px;
    font-size: .88rem;
    line-height: 1.6;
    color: #5b6b7a;
}

/* display/align-items come from bootstrap utility classes on the element */
.services-stat-card {
    gap: 18px;
    margin-top: 32px;
    padding: 14px 22px 14px 14px;
    background: var(--paper-100);
    border-radius: 100px;
}

/* .services-stat-icons: display/flex-shrink come from bootstrap
           utility classes (d-flex flex-shrink-0) on the element itself */
.services-stat-icons span {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    border: 3px solid var(--paper-100);
}

.services-stat-icons span:first-child {
    background: var(--navy-950);
    z-index: 1;
}

.services-stat-icons span:last-child {
    background: var(--ice-400);
    margin-left: -16px;
}

.services-stat-text {
    font-weight: 600;
    font-size: .92rem;
    line-height: 1.4;
    color: var(--navy-950);
}

.services-visual {
    position: relative;
    border-radius: 28px;
    overflow: hidden;
    min-height: 560px;
    background: var(--navy-800);
}

.binded-item {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity .45s ease;
}

.binded-item img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.binded-item.active {
    opacity: 1;
    visibility: visible;
}

.binded-item-bg {
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(135deg, rgba(244, 247, 250, .05) 0 2px, transparent 2px 14px),
        linear-gradient(150deg, var(--navy-800), var(--navy-950));
}

.binded-item-bg i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    color: rgba(244, 247, 250, .12);
}

.binded-item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(10, 24, 38, .92) 0%, rgba(10, 24, 38, .55) 32%, transparent 60%);
}

.binded-item-num {
    position: absolute;
    left: 32px;
    bottom: 108px;
    font-weight: 700;
    font-size: 4.5rem;
    line-height: 1;
    color: rgba(244, 247, 250, .28);
}

.binded-item-text {
    position: absolute;
    left: 32px;
    right: 32px;
    bottom: 32px;
}

.binded-item-text h3 {
    font-weight: 600;
    font-size: 1.3rem;
    color: #fff;
    margin: 0 0 8px;
}

.binded-item-text p {
    font-size: .88rem;
    line-height: 1.6;
    color: rgba(244, 247, 250, .78);
    max-width: 40ch;
    margin: 0;
}

#who-we-are {
    position: relative;
    padding: 110px 0 100px;
    background: var(--paper-100);
    overflow: hidden;
}

#who-we-are::before {
    content: "";
    position: absolute;
    top: -220px;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 900px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(95, 168, 211, .22) 0%, rgba(95, 168, 211, .06) 45%, transparent 70%);
    pointer-events: none;
}

.who-inner {
    position: relative;
    z-index: 1;
}

.who-headline {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(1.9rem, 3.4vw, 2.7rem);
    line-height: 1.28;
    color: var(--navy-950);
    max-width: 900px;
    margin: 0 auto 2rem;
}

.who-media-row {
    margin-top: 64px;
}

.who-panel {
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 24px 50px -24px rgba(10, 24, 38, .25);
}

.who-photo {
    min-height: 380px;
    height: 100%;
    position: relative;
    background: var(--navy-950);
}

.who-photo img {
    width: 100%;
    height: 100%;
    min-height: 380px;
    object-fit: cover;
    display: block;
}

.who-photo::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(200deg, rgba(10, 24, 38, .05) 0%, rgba(10, 24, 38, .55) 100%);
    pointer-events: none;
}

/* display/align-items/gap-2 come from bootstrap utility classes on
           the element itself */
.who-photo .who-photo-tag {
    position: absolute;
    left: 20px;
    bottom: 18px;
    z-index: 2;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: .78rem;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: #fff;
}

.who-photo .who-photo-tag .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--orange-500);
}

/* display/flex-direction/justify-content/height come from bootstrap
           utility classes (d-flex flex-column justify-content-center h-100)
           on the element */
.who-stats {
    background: #fff;
    border: 1px solid rgba(10, 24, 38, .08);
    border-radius: 24px;
    padding: 32px 28px;
}

.who-stat-num {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 2.4rem;
    color: var(--navy-950);
    line-height: 1;
    margin-bottom: 6px;
}

.who-stat-label {
    font-size: .85rem;
    color: #5b6b7a;
    line-height: 1.5;
    margin: 0;
}

.who-stat-divider {
    height: 2px;
    background: rgba(10, 24, 38, .08);
    border-radius: 2px;
    margin: 22px 0;
    overflow: hidden;
}

.who-stat-divider span {
    display: block;
    width: 45%;
    height: 100%;
    background: var(--orange-500);
}

/* display/align-items come from bootstrap utility classes on the element */
.who-review-pill {
    gap: 14px;
    margin-top: 26px;
    padding: 10px 18px 10px 10px;
    background: var(--paper-100);
    border-radius: 100px;
}

/* .who-review-avatars: display/flex-shrink come from bootstrap
           utility classes (d-flex flex-shrink-0) on the element itself */

.who-review-avatars span {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: .78rem;
    font-weight: 600;
    font-family: 'Space Grotesk', sans-serif;
    border: 2px solid var(--paper-100);
    margin-left: -12px;
}

.who-review-avatars span:first-child {
    margin-left: 0;
}

.who-review-avatars span:nth-child(1) {
    background: var(--navy-950);
    z-index: 3;
}

.who-review-avatars span:nth-child(2) {
    background: var(--ice-400);
    z-index: 2;
}

.who-review-avatars span:nth-child(3) {
    background: var(--orange-500);
    z-index: 1;
    font-size: .7rem;
}

.who-review-text {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: .85rem;
    color: var(--navy-950);
    line-height: 1.35;
}

/* ---------- Section shell — same navy gradient used on the
           "Why Choose Us" banner, so this section reads as part of the
           same dark family rather than a new background treatment ---------- */
#faq {
    position: relative;
    background: linear-gradient(120deg, var(--navy-950) 0%, var(--navy-800) 100%);
    overflow: hidden;
    padding: 110px 0;
}

.faq-inner {
    position: relative;
    z-index: 1;
}

.faq-headline {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 3.6vw, 2.9rem);
    line-height: 1.12;
    color: #fff;
    margin: 0 0 3rem;
}

.faq-cta-card {
    position: relative;
    background: rgba(244, 247, 250, .04);
    border: 1px solid rgba(244, 247, 250, .1);
    border-radius: 18px;
    padding: 34px 30px;
    max-width: 420px;
}

.faq-cta-dot {
    position: absolute;
    top: -6px;
    left: 34px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--ice-400);
    box-shadow: 0 0 0 5px rgba(95, 168, 211, .18);
}

.faq-cta-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 1.5rem;
    line-height: 1.3;
    color: #fff;
    margin: 0 0 22px;
}

/* ---------- Reusable diagonal-cut CTA button, shared by the hero,
           who-we-are, and faq sections so the button language stays
           identical across the site ---------- */
.btn-diagonal {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: .6rem;
    padding: 1rem 2.4rem 1rem 2rem;
    background: var(--orange-500);
    color: #fff;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: .85rem;
    letter-spacing: .05em;
    text-decoration: none;
    clip-path: polygon(0 0, 100% 0, 88% 100%, 0% 100%);
    transition: background .2s ease, transform .2s ease;
}

.btn-diagonal:hover {
    background: var(--orange-600);
    transform: translateX(2px);
    color: #fff;
}

.faq-accordion .accordion-item {
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(244, 247, 250, .14);
}

.faq-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: 100%;
    background: none;
    border: none;
    padding: 26px 4px;
    cursor: pointer;
    text-align: left;
    text-decoration: none;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 1.1rem;
    color: #fff;
}

.faq-toggle:hover {
    color: var(--ice-400);
}

.faq-toggle:focus-visible {
    outline: 2px solid var(--ice-400);
    outline-offset: 2px;
}

.faq-toggle-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(244, 247, 250, .6);
    flex-shrink: 0;
    transition: background .25s ease, color .25s ease;
}

.faq-toggle[aria-expanded="true"] .faq-toggle-icon {
    background: var(--orange-500);
    color: #fff;
}

.faq-toggle-icon .fa-minus {
    display: none;
}

.faq-toggle[aria-expanded="true"] .faq-toggle-icon .fa-plus {
    display: none;
}

.faq-toggle[aria-expanded="true"] .faq-toggle-icon .fa-minus {
    display: block;
}

.faq-accordion .accordion-body {
    padding: 0 44px 26px 4px;
    font-size: .95rem;
    line-height: 1.7;
    color: rgba(244, 247, 250, .68);
}

/* ---------- Section shell — light paper background, same family as
           the "Who We Are" and services sections it sits between ---------- */
#projects {
    padding: 100px 0 110px;
    background: var(--paper-100);
    overflow: hidden;
}

/* extends .section-headline: same type treatment, capped width */
.projects-headline {
    max-width: 560px;
}

.projects-intro {
    font-size: .92rem;
    line-height: 1.7;
    color: #5b6b7a;
    margin: 0;
    max-width: 46ch;
}

/* display comes from the d-flex utility class on the element */
.projects-nav {
    gap: 12px;
    margin-top: 28px;
}

.projects-nav button {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid rgba(10, 24, 38, .15);
    background: #fff;
    color: var(--navy-950);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background .25s ease, color .25s ease, border-color .25s ease;
}

.projects-nav button:hover {
    background: var(--orange-500);
    border-color: var(--orange-500);
    color: #fff;
}

.projects-nav button.swiper-button-disabled {
    opacity: .35;
    cursor: default;
}

.projects-nav button.swiper-button-disabled:hover {
    background: #fff;
    border-color: rgba(10, 24, 38, .15);
    color: var(--navy-950);
}

.projects-swiper {
    margin-top: 56px;
    padding-bottom: 8px;
}

.project-card {
    display: block;
    text-decoration: none;
}

.project-media {
    position: relative;
    border-radius: 22px;
    overflow: hidden;
    aspect-ratio: 4 / 3;
    box-shadow: 0 20px 40px -20px rgba(10, 24, 38, .3);
}

.project-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .5s ease;
}

.project-card:hover .project-media img {
    transform: scale(1.06);
}

.project-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(10, 24, 38, .55) 0%, rgba(10, 24, 38, .05) 45%, transparent 60%),
        linear-gradient(100deg, rgba(10, 24, 38, .35) 0%, transparent 50%);
}

.project-num {
    position: absolute;
    top: 18px;
    right: 20px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: .95rem;
    color: #fff;
    background: rgba(10, 24, 38, .45);
    backdrop-filter: blur(4px);
    padding: .3rem .7rem;
    border-radius: 100px;
    z-index: 1;
}

.project-info {
    padding: 22px 4px 0;
}

.project-category {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: .78rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--orange-600);
    margin-bottom: 8px;
}

.project-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--navy-950);
    text-decoration: underline;
    text-decoration-color: rgba(10, 24, 38, .25);
    text-underline-offset: 5px;
    transition: text-decoration-color .25s ease, color .25s ease;
}

.project-card:hover .project-title {
    color: var(--orange-600);
    text-decoration-color: var(--orange-500);
}

#contact {
    padding: 100px 0 110px;
    background: var(--paper-100);
}

/* extends .section-headline: same type treatment, adds bottom margin
           since this section's header isn't paired with a side-by-side intro */
.contact-headline {
    margin: 0 0 14px;
}

.contact-headline .accent {
    color: var(--orange-500);
}

.contact-intro {
    font-size: .92rem;
    line-height: 1.7;
    color: #5b6b7a;
    margin: 0 auto;
    max-width: 46ch;
}

.contact-form-card {
    background: #fff;
    border: 1px solid rgba(10, 24, 38, .08);
    border-radius: 22px;
    padding: 48px;
    box-shadow: 0 20px 40px -20px rgba(10, 24, 38, .15);
    margin: 56px auto 0;
}

.form-label {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: .85rem;
    color: var(--navy-950);
    margin-bottom: 8px;
}

.form-label .req {
    color: var(--orange-500);
}

.zenith-input {
    background: var(--paper-100);
    border: 1px solid rgba(10, 24, 38, .1);
    border-radius: 10px;
    color: var(--navy-950);
    font-size: .92rem;
    padding: .85rem 1rem;
}

.zenith-input::placeholder {
    color: #8b98a5;
}

.zenith-input:focus {
    background: #fff;
    border-color: var(--orange-500);
    box-shadow: 0 0 0 .2rem rgba(255, 106, 0, .12);
    color: var(--navy-950);
}

textarea.zenith-input {
    resize: vertical;
    min-height: 130px;
}

.btn-send {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: .95rem;
    color: #fff;
    background: var(--orange-500);
    border: none;
    border-radius: 10px;
    padding: .95rem 1.5rem;
    transition: background .25s ease, transform .15s ease;
}

.btn-send:hover {
    background: var(--orange-600);
    color: #fff;
}

.btn-send:active {
    transform: translateY(1px);
}

.btn-send i {
    font-size: 1rem;
}

#site-footer {
    position: relative;
    background: linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 100%);
    color: rgba(244, 247, 250, .65);
    padding: 88px 0 0;
    overflow: hidden;
    font-family: 'Inter', sans-serif;
}

#site-footer::before {
    content: "";
    position: absolute;
    top: -260px;
    right: -160px;
    width: 640px;
    height: 640px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(95, 168, 211, .14) 0%, rgba(95, 168, 211, .04) 45%, transparent 70%);
    pointer-events: none;
}

.footer-inner {
    position: relative;
    z-index: 1;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
}

.footer-logo svg {
    height: 30px;
    width: auto;
}

.footer-brand-text {
    max-width: 360px;
    font-size: .92rem;
    line-height: 1.7;
    color: rgba(244, 247, 250, .55);
    margin-bottom: 26px;
}

/* display comes from the d-flex utility class on the element */
.footer-socials {
    gap: 10px;
}

.footer-socials a {
    width: 38px;
    height: 38px;
    /* border-radius: 50%; */
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(244, 247, 250, .06);
    border: 1px solid rgba(244, 247, 250, .12);
    color: #F4F7FA;
    font-size: .85rem;
    text-decoration: none;
    transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.footer-socials a:hover {
    background: var(--orange-500);
    border-color: var(--orange-500);
    color: #fff;
    transform: translateY(-2px);
}

.footer-heading {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: .01em;
    color: #F4F7FA;
    margin-bottom: 24px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 14px;
}

.footer-links a {
    color: rgba(244, 247, 250, .62);
    text-decoration: none;
    font-size: .92rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color .2s ease, gap .2s ease;
}

.footer-links a::before {
    content: "";
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--orange-500);
    flex-shrink: 0;
    opacity: .7;
}

.footer-links a:hover {
    color: #F4F7FA;
    gap: 11px;
}

/* display/align-items come from bootstrap utility classes on the element */
.footer-contact-item {
    gap: 14px;
    margin-bottom: 20px;
}

.footer-contact-item .icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    border-radius: 50%;
    background: rgba(255, 102, 0, .14);
    color: var(--orange-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .9rem;
}

.footer-contact-item p {
    margin: 0;
    font-size: .9rem;
    line-height: 1.55;
    color: rgba(244, 247, 250, .7);
}

.footer-contact-item a {
    color: rgba(244, 247, 250, .7);
    text-decoration: none;
}

.footer-contact-item a:hover {
    color: #F4F7FA;
}

.footer-divider {
    height: 1px;
    background: rgba(244, 247, 250, .1);
    margin: 64px 0 0;
}

/* display/align-items/justify-content/flex-wrap come from bootstrap
           utility classes on the element */
.footer-bottom {
    padding: 26px 0;
    gap: 14px;
    font-size: .82rem;
    color: rgba(244, 247, 250, .45);
}

/* display/flex-wrap come from bootstrap utility classes on the element */
.footer-bottom .legal-links {
    gap: 22px;
}

.footer-bottom .legal-links a {
    color: rgba(244, 247, 250, .45);
    text-decoration: none;
}

.footer-bottom .legal-links a:hover {
    color: var(--orange-500);
}

/* ==========================================================
           RESPONSIVE — all breakpoints grouped together below, in
           descending order (992px → 768px), each block holding every
           component's overrides for that breakpoint.
           ========================================================== */

/* ---------- ≤ 991.98px (lg breakpoint) ---------- */
@media (max-width: 991.98px) {
    .offcanvas {
        background: #fff;
    }

    .navbar-nav .nav-link {
        padding: .75rem 0 !important;
    }

    .dropdown-menu {
        box-shadow: none;
        padding-left: 1rem;
    }

    .hvac-headline {
        max-width: none;
    }

    .hvac-overlay {
        background: linear-gradient(180deg,
                rgba(10, 24, 38, .55) 0%,
                rgba(10, 24, 38, .92) 65%);
    }

    .why-item {
        border-left: none;
        border-top: 1px solid rgba(244, 247, 250, .14);
        padding: 28px 0 0;
    }

    .why-col:first-child .why-item {
        border-top: none;
        padding-top: 0;
    }

    .services-visual {
        min-height: 420px;
        margin-top: 40px;
    }

    .who-panel,
    .who-stats {
        margin-bottom: 24px;
    }

    .faq-cta-card {
        max-width: none;
        margin-top: 40px;
    }

    .projects-nav {
        margin-top: 16px;
    }

    #contact {
        padding: 80px 0 90px;
    }

    .contact-form-card {
        padding: 32px 24px;
        margin-top: 40px;
    }

    #site-footer {
        padding-top: 64px;
        text-align: center;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-brand-text {
        margin-left: auto;
        margin-right: auto;
    }

    .footer-socials {
        justify-content: center;
        margin-bottom: 44px;
    }

    .footer-col {
        margin-bottom: 44px;
    }

    .footer-contact-item {
        text-align: left;
    }

    .footer-bottom {
        justify-content: center;
        text-align: center;
    }
}

/* ---------- prefers-reduced-motion (all components) ---------- */
@media (prefers-reduced-motion: reduce) {

    .hvac-eyebrow,
    .hvac-headline,
    .hvac-subtext,
    .hvac-cta-row {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }

    .why-item-icon,
    .why-item-icon i {
        transition: none !important;
    }

    .binded-item,
    .service-arrow,
    .service-num,
    .service-title {
        transition: none !important;
    }
}


/* invalid input state, matches your existing zenith-input look */
.zenith-input.is-invalid {
    border-color: #e0483e;
    background: #fff;
}

.zenith-input.is-invalid:focus {
    border-color: #e0483e;
    box-shadow: 0 0 0 .2rem rgba(224, 72, 62, .12);
}

.invalid-feedback {
    display: none;
    margin-top: .35rem;
    font-size: .8rem;
    color: #e0483e;
}

.zenith-input.is-invalid~.invalid-feedback,
.is-invalid+.invalid-feedback {
    display: block;
}

/* status message under the textarea */
.form-message {
    display: none;
    border-radius: 10px;
    padding: .75rem 1rem;
    font-size: .9rem;
}

.form-message.visible {
    display: block;
}

.form-message.success {
    background: rgba(40, 167, 69, .1);
    color: #1c7a34;
    border: 1px solid rgba(40, 167, 69, .25);
}

.form-message.error {
    background: rgba(224, 72, 62, .1);
    color: #b3352c;
    border: 1px solid rgba(224, 72, 62, .25);
}

.btn-send[disabled] {
    opacity: .7;
    cursor: not-allowed;
}

/* Remove Bootstrap's default focus ring everywhere in the nav */
.navbar-nav .nav-link:focus,
.navbar-nav .nav-link:focus-visible,
.dropdown-item:focus,
.dropdown-item:focus-visible,
.dropdown-toggle:focus,
.dropdown-toggle:focus-visible {
    box-shadow: none !important;
    outline: none !important;
}

/* Desktop-only: make the menu transition-friendly */
@media (min-width: 992px) {
    .navbar-nav .dropdown-menu {
        display: block;
        /* always in DOM flow, we control visibility instead */
        opacity: 0;
        visibility: hidden;
        transform: translateY(8px);
        transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
        pointer-events: none;
    }

    .navbar-nav .dropdown-menu.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto;
    }
}