/* =========================
   BASE
========================= */

:root {
    --navy: #123554;
    --navy-dark: #0b2943;
    --navy-light: #214c6d;

    --orange: #f16f21;
    --orange-dark: #d95b12;

    --white: #ffffff;
    --mist: #f4f7f9;
    --soft-blue: #eaf1f5;

    --text: #153047;
    --muted: #5d6f7d;
    --border: #d8e1e7;

    --radius: 16px;
    --shadow: 0 16px 40px rgba(16, 49, 75, 0.10);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
}

img {
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
.button,
a {
    -webkit-tap-highlight-color: transparent;
}

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}


/* =========================
   BUTTONS
========================= */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-height: 48px;
    padding: 12px 22px;

    border-radius: 10px;
    border: 2px solid transparent;

    font-weight: 700;
    cursor: pointer;

    transition:
        transform 0.15s ease,
        background 0.15s ease,
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--orange);
    color: var(--white);
}

.button-primary:hover {
    background: var(--orange-dark);
    box-shadow: 0 8px 20px rgba(241, 111, 33, 0.25);
}

.button-secondary {
    background: var(--white);
    color: var(--navy);
    border-color: var(--border);
}

.button-secondary:hover {
    border-color: var(--navy);
}


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

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;

    background: var(--navy);
    color: var(--white);

    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.08);
}

.nav-container {
    min-height: 82px;

    display: flex;
    align-items: center;
    gap: 30px;
}

.logo {
    font-size: 21px;
    font-weight: 800;
    white-space: nowrap;
}

.desktop-nav {
    display: flex;
    gap: 22px;
    margin-left: auto;
}

.desktop-nav a {
    font-size: 15px;
    font-weight: 600;
    opacity: 0.92;
}

.desktop-nav a:hover {
    opacity: 1;
    color: #ffd9bf;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.phone-link {
    font-weight: 700;
    white-space: nowrap;
}

.mobile-menu-button {
    display: none;

    margin-left: auto;
    padding: 8px 12px;

    color: var(--white);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 8px;

    font-size: 24px;
    cursor: pointer;
}

.mobile-nav {
    display: none;
    flex-direction: column;

    padding: 10px 20px 22px;
    background: var(--navy-dark);
}

.mobile-nav a {
    padding: 11px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}


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

.hero {
    padding: 86px 0;
    background: var(--white);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 60px;
}

.eyebrow {
    margin-bottom: 12px;

    color: var(--orange);

    font-size: 13px;
    font-weight: 800;
    letter-spacing: 1.4px;
}

.hero h1 {
    margin: 0 0 20px;

    max-width: 620px;

    color: var(--navy);

    font-size: clamp(46px, 6vw, 72px);
    line-height: 1.04;
    letter-spacing: -2.5px;
}

.hero-description {
    max-width: 610px;
    margin-bottom: 28px;

    color: var(--muted);

    font-size: 19px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-visual {
    min-height: 420px;

    display: flex;
    align-items: flex-end;

    padding: 36px;

    border-radius: 24px;

    background:
        linear-gradient(
            145deg,
            rgba(11, 41, 67, 0.62),
            rgba(11, 41, 67, 0.38)
        ),
         url("images/hero-hvac.jpg");

background-size: cover;
background-position: center;

    box-shadow: var(--shadow);

    overflow: hidden;
}

.hero-visual-content {
    color: var(--white);
}

.hero-visual-content h2 {
    margin: 8px 0 6px;
    font-size: 27px;
}

.hero-visual-content p {
    max-width: 420px;
    margin: 0;
    opacity: 0.9;
}

.hero-icon {
    display: inline-flex;
    width: 62px;
    height: 62px;

    align-items: center;
    justify-content: center;

    border-radius: 50%;

    background: rgba(255, 255, 255, 0.12);

    font-size: 32px;
}


/* =========================
   TRUST STRIP
========================= */

.trust-strip {
    background: var(--navy);
    color: var(--white);
}

.trust-grid {
    min-height: 68px;

    display: grid;
    grid-template-columns: repeat(3, 1fr);

    align-items: center;
    text-align: center;

    font-weight: 700;
}

.trust-grid div {
    padding: 20px;
}


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

.section {
    padding: 88px 0;
}

.section-light {
    background: var(--mist);
}

.section-soft {
    background: var(--soft-blue);
}

.section-heading {
    max-width: 760px;
    margin: 0 auto 45px;

    text-align: center;
}

.section-heading h2,
.about-grid h2,
.service-area-grid h2 {
    margin: 0 0 14px;

    color: var(--navy);

    font-size: clamp(34px, 4vw, 46px);
    line-height: 1.15;
}

.section-heading p:not(.eyebrow),
.about-grid p,
.service-area-grid p {
    color: var(--muted);
}


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

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);

    gap: 22px;
}

.service-card,
.benefit-card {
    padding: 28px;

    border: 1px solid var(--border);
    border-radius: var(--radius);

    background: var(--white);

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        border-color 0.2s ease;
}

.service-card:hover,
.benefit-card:hover {
    transform: translateY(-4px);

    border-color: #bbcbd6;
    box-shadow: var(--shadow);
}

.service-card h3,
.benefit-card h3 {
    margin-top: 0;
    margin-bottom: 10px;

    color: var(--navy);
    font-size: 20px;
}

.service-card p,
.benefit-card p {
    margin-bottom: 0;
    color: var(--muted);
}


/* =========================
   BENEFITS
========================= */

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

    gap: 20px;
}


/* =========================
   ABOUT
========================= */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 0.9fr;

    align-items: center;
    gap: 70px;
}

.about-highlight {
    min-height: 260px;

    display: flex;
    flex-direction: column;
    justify-content: center;

    padding: 42px;

    border-radius: 22px;

    background: var(--navy);
    color: var(--white);

    box-shadow: var(--shadow);
}

.about-highlight span {
    margin-bottom: 8px;

    color: #ffd6ba;

    font-size: 13px;
    font-weight: 800;
    letter-spacing: 1.5px;
}

.about-highlight strong {
    font-size: 30px;
    line-height: 1.25;
}


/* =========================
   SERVICE AREA
========================= */

.service-area-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;

    gap: 60px;
    align-items: center;
}

.area-card {
    min-height: 240px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    border-radius: 22px;

    background:
        radial-gradient(circle at top right, #315f80, transparent 42%),
        var(--navy);

    color: var(--white);

    box-shadow: var(--shadow);
}

.area-card span {
    font-size: 25px;
    font-weight: 800;
    letter-spacing: 1px;
}

.area-card p {
    margin: 4px 0 0;
    color: rgba(255, 255, 255, 0.8);
}


/* =========================
   PROBLEM CTA
========================= */

.problem-cta {
    padding: 66px 0;
    background: var(--navy);
    color: var(--white);
}

.problem-content {
    max-width: 850px;
    text-align: center;
}

.problem-content h2 {
    margin-top: 0;
    margin-bottom: 12px;

    font-size: clamp(34px, 4vw, 46px);
}

.problem-content > p {
    margin-bottom: 24px;
    opacity: 0.9;
}

.problem-content small {
    display: block;

    max-width: 780px;
    margin: 22px auto 0;

    opacity: 0.76;
    line-height: 1.5;
}


/* =========================
   FORM
========================= */

.service-form,
.form-success {
    width: min(680px, 100%);
    margin: 0 auto;

    padding: 34px;

    border: 1px solid var(--border);
    border-radius: 20px;

    background: var(--white);

    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;

    margin-bottom: 7px;

    color: var(--navy);

    font-size: 14px;
    font-weight: 700;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;

    padding: 14px 15px;

    border: 1px solid #cbd8df;
    border-radius: 10px;

    background: var(--white);
    color: var(--text);

    outline: none;

    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease;
}

.form-group textarea {
    min-height: 130px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--navy-light);

    box-shadow: 0 0 0 3px rgba(33, 76, 109, 0.12);
}

.submit-button {
    width: 100%;
    border: none;
}

.submit-button:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.form-note {
    margin: 14px 0 0;

    color: var(--muted);

    font-size: 13px;
    line-height: 1.5;
}

.form-success {
    text-align: center;
}

.form-success h3 {
    margin-top: 0;

    color: var(--navy);

    font-size: 29px;
}

.form-success a {
    color: var(--orange);
    font-weight: 700;
}


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

.faq-container {
    max-width: 850px;
}

.faq-item {
    margin-bottom: 14px;

    border: 1px solid var(--border);
    border-radius: 12px;

    background: var(--white);
}

.faq-item summary {
    padding: 20px 22px;

    color: var(--navy);

    font-weight: 700;

    cursor: pointer;
}

.faq-item p {
    margin: 0;
    padding: 0 22px 20px;

    color: var(--muted);
}


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

.site-footer {
    padding: 52px 0 20px;

    background: var(--navy-dark);
    color: var(--white);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    gap: 40px;
}

.site-footer h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

.site-footer p {
    margin: 4px 0;
    opacity: 0.78;
}

.site-footer a:hover {
    color: #ffd6ba;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.footer-bottom {
    width: min(1120px, calc(100% - 40px));

    margin: 35px auto 0;
    padding-top: 18px;

    border-top: 1px solid rgba(255, 255, 255, 0.13);

    font-size: 13px;
    opacity: 0.7;
}


/* =========================
   MOBILE CALL BUTTON
========================= */

.mobile-call-button {
    display: none;
}


/* =========================
   RESPONSIVE
========================= */

@media (max-width: 1050px) {

    .desktop-nav,
    .nav-actions {
        display: none;
    }

    .mobile-menu-button {
        display: block;
    }

    .mobile-nav.open {
        display: flex;
    }

    .hero-grid,
    .about-grid,
    .service-area-grid {
        grid-template-columns: 1fr;
    }

    .hero-grid {
        gap: 42px;
    }

    .hero-visual {
        min-height: 330px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }

}


@media (max-width: 700px) {

    body {
        padding-bottom: 60px;
    }

    .container {
        width: min(100% - 28px, 1120px);
    }

    .site-header {
        position: sticky;
    }

    .nav-container {
        min-height: 68px;
    }

    .logo {
        font-size: 17px;
    }

    .hero {
        padding: 42px 0 54px;
    }

    .hero h1 {
        font-size: 42px;
        line-height: 1.05;
        letter-spacing: -1.4px;
    }

    .hero-description {
        font-size: 17px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .button {
        width: 100%;
    }

    .hero-visual {
        min-height: 270px;
        padding: 26px;
    }

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

    .trust-grid div {
        padding: 14px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    }

    .section {
        padding: 64px 0;
    }

    .services-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .service-card,
    .benefit-card {
        padding: 23px;
    }

    .about-grid,
    .service-area-grid {
        gap: 35px;
    }

    .about-highlight,
    .area-card {
        min-height: 210px;
        padding: 30px;
    }

    .area-card span {
        font-size: 20px;
    }

    .service-form,
    .form-success {
        padding: 22px;
    }

    .footer-grid {
        flex-direction: column;
    }

    .mobile-call-button {
        position: fixed;
        right: 0;
        bottom: 0;
        left: 0;
        z-index: 2000;

        display: flex;
        align-items: center;
        justify-content: center;

        min-height: 54px;
        padding-bottom: env(safe-area-inset-bottom);

        background: var(--orange);
        color: var(--white);

        font-weight: 800;

        box-shadow: 0 -5px 18px rgba(0, 0, 0, 0.15);
    }

}