:root {
    --primary-red: #9c1018;
    --secondary-red: #c61d24;
    --orange: #e65b21;
    --dark: #1f1f1f;
    --cream: #f7f2ea;
    --white: #ffffff;
    --gray: #666666;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", Arial, sans-serif;
    background: var(--cream);
    color: var(--dark);
    line-height: 1.6;
}

.btn {
    text-decoration: none;
    font-weight: 700;
}

.btn:hover,
.btn:focus,
.btn:active,
.btn:visited {
    text-decoration: none;
}

/* ======================
   HEADER
====================== */

.site-header {
    background: rgba(247, 242, 234, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar {
    max-width: 1400px;
    margin: auto;
    padding: 15px 30px;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand img {
    height: 58px;
    transition: 0.3s ease;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 35px;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-red);
    font-weight: 600;
    transition: 0.3s;
}

.nav-links a:hover {
    color: var(--orange);
}

.nav-call {
    text-decoration: none;

    display: inline-flex;
    align-items: center;
    gap: 10px;

    background: linear-gradient(135deg,
            var(--orange),
            var(--primary-red));

    color: white;

    padding: 14px 22px;

    border-radius: 999px;

    font-weight: 800;

    box-shadow:
        0 10px 25px rgba(156, 16, 24, 0.25);

    transition: 0.3s ease;
}

.nav-call:hover {
    transform: translateY(-2px);
}

.nav-call img {
    width: 18px;
    height: 18px;
    display: block;
}

.nav-call span {
    color: white;
}

.menu-toggle {
    display: none;
    border: none;
    background: none;
    font-size: 30px;
    color: var(--primary-red);
    cursor: pointer;
}

/* ======================
   HERO
====================== */

.hero {
    min-height: calc(100vh - 105px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 90px 25px;
    text-align: left;
    position: relative;
    overflow: hidden;

    background:
        linear-gradient(rgba(20, 20, 20, 0.65),
            rgba(20, 20, 20, 0.65)),
        url("assets/chicago-skyline.png");

    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg,
            rgba(0, 0, 0, 0.45),
            rgba(0, 0, 0, 0.20));
}

.hero::after {
    content: "CHICAGO HVAC";
    position: absolute;
    right: -40px;
    bottom: 40px;
    font-size: clamp(70px, 13vw, 210px);
    font-weight: 900;
    letter-spacing: -8px;
    color: rgba(255, 255, 255, 0.045);
    white-space: nowrap;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.hero .eyebrow {
    color: #ffd5b3;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.16);
    padding: 10px 18px;
    border-radius: 999px;
    display: inline-block;
}

.hero h1 {
    font-size: clamp(46px, 7vw, 86px);
    line-height: 1.04;
    margin: 28px 0 24px;
    color: var(--white);
    letter-spacing: -2.5px;
}

.hero p {
    font-size: 22px;
    max-width: 760px;
    margin: 0;
    color: rgba(255, 255, 255, 0.86);
}

.hero-actions {
    margin-top: 42px;
    display: flex;
    justify-content: flex-start;
    gap: 18px;
    flex-wrap: wrap;
}

.hero .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 210px;
    min-height: 56px;
    border-radius: 999px;
    font-size: 16px;
}

.hero .btn-primary {
    background: var(--white);
    color: var(--primary-red);
    box-shadow: 0 14px 35px rgba(0, 0, 0, 0.25);
}

.hero .btn-primary:hover {
    transform: translateY(-3px);
}

.hero .btn-secondary {
    border: 2px solid rgba(255, 255, 255, 0.75);
    color: var(--white);
    background: transparent;
}

.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
}

.hero-badges {
    margin-top: 34px;
    display: flex;
    justify-content: flex-start;
    gap: 14px;
    flex-wrap: wrap;
}

.hero-badges span {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--white);
    padding: 11px 17px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
}

/* ======================
   TRUST BAR
====================== */

.trust-bar {
    background: white;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);

    display: grid;
    grid-template-columns: repeat(4, 1fr);

    max-width: 1200px;
    margin: -50px auto 0;
    position: relative;
    z-index: 20;

    border-radius: 18px;
    overflow: hidden;
}

.trust-item {
    padding: 28px;
    text-align: center;
}

.trust-item strong {
    display: block;
    font-size: 24px;
    color: var(--primary-red);
}

.trust-item span {
    color: var(--gray);
}

/* ======================
   SECTIONS
====================== */

.section {
    max-width: 1200px;
    margin: auto;
    padding: 100px 25px;
}

.section-heading {
    text-align: center;
    margin-bottom: 60px;
}

.section-heading h2 {
    font-size: 46px;
    margin: 15px 0;
    color: var(--primary-red);
}

.section-heading p {
    max-width: 700px;
    margin: auto;
    color: var(--gray);
}

/* ======================
   SERVICES
====================== */

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.card {
    background: white;
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: 0.3s;
    border-top: 5px solid var(--orange);
}

.card:hover {
    transform: translateY(-8px);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--primary-red);
}

/* ======================
   WHY US
====================== */

.dark-section {
    max-width: 100%;
    background:
        radial-gradient(circle at top left, rgba(230, 91, 33, 0.28), transparent 30%),
        linear-gradient(135deg, var(--primary-red), var(--dark));
    color: white;
}

.dark-section h2 {
    color: white;
}

.light {
    color: #ffd5b3;
}

.features {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    text-align: center;
}

.features strong {
    display: block;
    font-size: 42px;
    margin-bottom: 10px;
}

.features span {
    font-size: 18px;
}

/* ======================
   SERVICE AREAS
====================== */

.area-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
}

.area-list span {
    background: white;
    padding: 14px 22px;
    border-radius: 50px;
    box-shadow: var(--shadow);
    font-weight: 600;
}

/* ======================
   SERVICE MAP
====================== */

.service-map-section {
    padding-top: 70px;
}

.service-map {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr;
    gap: 28px;
    align-items: stretch;
}

.service-map-content,
.service-map-card {
    background: var(--white);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 36px;
}

.service-map-content {
    border-top: 5px solid var(--orange);
}

.service-map-content h3,
.service-map-card strong {
    color: var(--primary-red);
    font-size: 28px;
    display: block;
    margin-bottom: 14px;
}

.service-map-content p,
.service-map-card p {
    color: var(--gray);
    margin-bottom: 24px;
}

.service-cities {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.service-cities span {
    background: var(--cream);
    color: var(--primary-red);
    border: 1px solid rgba(156, 16, 24, 0.15);
    padding: 10px 15px;
    border-radius: 999px;
    font-weight: 700;
}

.service-map-card {
    background: linear-gradient(135deg, var(--primary-red), var(--dark));
    color: var(--white);
}

.service-map-card strong,
.service-map-card p {
    color: var(--white);
}

/* ======================
   FAQ
====================== */

.faq-list {
    max-width: 900px;
    margin: auto;
    display: grid;
    gap: 14px;
}

.faq-list details {
    background: var(--white);
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 22px 26px;
    border-left: 5px solid var(--orange);
}

.faq-list summary {
    cursor: pointer;
    font-weight: 800;
    color: var(--primary-red);
    font-size: 18px;
}

.faq-list p {
    margin-top: 14px;
    color: var(--gray);
}

/* ======================
   LOCATION
====================== */

.location-section {
    padding-top: 70px;
}

.location-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.4fr;
    gap: 30px;
    align-items: stretch;
}

.location-info {
    background: var(--white);
    padding: 36px;
    border-radius: 18px;
    box-shadow: var(--shadow);
    border-top: 5px solid var(--orange);
}

.location-info h3 {
    color: var(--primary-red);
    font-size: 28px;
    margin-bottom: 18px;
}

.location-info p {
    color: var(--gray);
    margin-bottom: 8px;
}

.location-info .btn {
    margin-top: 24px;
    display: inline-flex;
}

.map-wrapper {
    min-height: 380px;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid rgba(156, 16, 24, 0.12);
}

.map-wrapper iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

.directions-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;

    margin-top: 24px;

    padding: 16px 24px;

    background: linear-gradient(135deg,
            var(--orange),
            var(--primary-red));

    color: white;
    text-decoration: none;
    font-weight: 800;

    border-radius: 999px;

    box-shadow:
        0 12px 28px rgba(156, 16, 24, 0.25);

    transition: 0.3s ease;
}

.directions-btn:hover {
    transform: translateY(-3px);
    box-shadow:
        0 16px 34px rgba(156, 16, 24, 0.35);
}

.directions-btn img {
    width: 22px;
    height: 22px;
    display: block;
}

.request-service-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;

    margin-top: 24px;

    padding: 16px 24px;

    background: var(--white);

    color: var(--primary-red);

    text-decoration: none;
    font-weight: 800;

    border-radius: 999px;

    box-shadow:
        0 12px 28px rgba(0, 0, 0, 0.18);

    transition: 0.3s ease;
}

.request-service-btn:hover {
    transform: translateY(-3px);

    box-shadow:
        0 16px 34px rgba(0, 0, 0, 0.25);
}

.request-service-btn img {
    width: 22px;
    height: 22px;
    display: block;
}

/* ======================
   CONTACT
====================== */

.contact-form {
    max-width: 700px;
    margin: auto;

    display: grid;
    gap: 18px;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    padding: 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
}

.contact-form textarea {
    min-height: 160px;
    resize: vertical;
}

.contact-form button {
    background: linear-gradient(135deg,
            var(--orange),
            var(--primary-red));

    color: white;
    border: none;
    padding: 16px;
    font-size: 18px;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
}

.contact-form button:hover {
    opacity: 0.9;
}

/* ======================
   FOOTER
====================== */

.footer {
    background: var(--dark);
    color: white;
    text-align: center;
    padding: 50px 20px;
}

.footer img {
    height: 90px;
    margin-bottom: 20px;
}

.footer p {
    margin-bottom: 10px;
}

.footer a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    display: block;
    margin-bottom: 15px;
}


/* ======================
   REVIEWS
====================== */

.review-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stars {
    color: var(--orange);
    font-size: 22px;
    letter-spacing: 2px;
}

.review-card strong {
    color: var(--primary-red);
}

.review-card span {
    color: var(--gray);
    font-size: 14px;
}

/* ======================
   BRANDS
====================== */

.brands-section {
    padding-top: 40px;
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 18px;
}

.brand-grid span {
    background: var(--white);
    border: 1px solid rgba(156, 16, 24, 0.15);
    border-radius: 12px;
    padding: 22px;
    text-align: center;
    font-weight: 800;
    color: var(--primary-red);
    box-shadow: var(--shadow);
}

/* ======================
   WHATSAPP
====================== */

.whatsapp-float {
    position: fixed;
    right: 24px;
    bottom: 24px;

    z-index: 9999;

    display: block;

    transition: transform 0.3s ease;
}

.whatsapp-float:hover {
    transform: scale(1.08);
}

.whatsapp-float img {
    width: 72px;
    height: 72px;
    display: block;

    filter:
        drop-shadow(0 8px 20px rgba(0, 0, 0, 0.25));
}

.footer-socials {
    margin: 20px 0;

    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-socials a {
    color: white;
    font-weight: 700;
    text-decoration: none;
}

.footer-socials a:hover {
    color: var(--orange);
}

.hero-whatsapp {
    margin-top: 24px;
}

.hero-whatsapp a {
    display: inline-block;
}

.hero-whatsapp img {
    display: block;
    height: 48px;
    width: auto;
    transition: 0.3s ease;
}

.hero-whatsapp img:hover {
    transform: translateY(-2px);
}

.footer-grid {
    max-width: 1200px;
    margin: 30px auto;
    display: grid;
    grid-template-columns: 1.1fr 1fr 1.2fr 0.8fr;
    gap: 60px;
    text-align: left;
    align-items: start;
}

.footer-column {
    min-width: 0;
}

.footer-column h3 {
    color: var(--orange);
    margin-bottom: 14px;
}

.footer-column p,
.footer-column a {
    color: rgba(255, 255, 255, 0.86);
    margin-bottom: 10px;
    display: block;
    text-decoration: none;
}

.footer-column a:hover {
    color: var(--orange);
}

.footer-socials {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-top: 10px;
}

.footer-socials a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    font-weight: 700;
}

.footer-legal {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

/* ======================
   MOBILE
====================== */

@media (max-width: 900px) {

    .menu-toggle {
        display: block;
    }

    .nav-call {
        display: inline-flex;
        padding: 12px 18px;
    }

    .nav-links {
        display: none;

        position: absolute;
        top: 100%;
        left: 0;
        right: 0;

        background: var(--cream);

        flex-direction: column;
        text-align: center;
        padding: 25px;
    }

    .nav-links.active {
        display: flex;
    }

    .hero h1 {
        font-size: 48px;
    }

    .section-heading h2 {
        font-size: 34px;
    }

    .features {
        gap: 35px;
    }

    .hero {
        min-height: auto;
        padding: 80px 22px;
    }

    .hero h1 {
        font-size: 42px;
        letter-spacing: -1px;
    }

    .hero p {
        font-size: 18px;
    }

    .hero::after {
        display: none;
    }

    .hero .btn {
        width: 100%;
        max-width: 320px;
    }

    .trust-bar {
        grid-template-columns: repeat(2, 1fr);
        margin-top: 0;
        border-radius: 0;
    }

    .location-grid {
        grid-template-columns: 1fr;
    }

    .map-wrapper {
        min-height: 320px;
    }

    .service-map {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        text-align: center;
    }

    .footer-socials,
    .footer-legal {
        align-items: center;
    }

    .whatsapp-float {
        right: 18px;
        bottom: 18px;
    }

    .whatsapp-float img {
        width: 60px;
        height: 60px;
    }
}