/* =============================================
   AIR DUCT PROS USA — Global Stylesheet
   ============================================= */
:root {
    --sky: #2986d2;
    --deep: #1565a8;
    --navy: #0d4f8c;
    --accent: #2986d2;
    --white: #ffffff;
    --gray: #5a6a7a;
    --light: #f0f6fc;
    --text: #1a2a3a;
    --border: rgba(41, 134, 210, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', sans-serif;
    color: var(--text);
    background: var(--white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
}

/* ── NAV ── */

nav {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 3%;
    height: 68px;
    box-shadow: 0 2px 12px rgba(41, 134, 210, 0.15);
    border-bottom: 2px solid #2986d2;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo img {
    height: 56px;
    width: auto;
    object-fit: contain;
}

.nav-logo span {
    display: none;
}

.nav-logo small {
    display: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: #1a2a3a;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #2986d2;
}

.nav-cta {
    background: #2986d2;
    color: #ffffff;
    padding: 0.6rem 1.4rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.88rem;
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-cta:hover {
    background: #1565a8;
    transform: translateY(-1px);
}

.nav-mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: #2986d2;
    font-size: 1.5rem;
    cursor: pointer;
}

/* ── BREADCRUMB ── */

.breadcrumb {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 1rem;
}

.breadcrumb a {
    color: var(--accent);
}

.breadcrumb span {
    margin: 0 0.4rem;
}

/* ── BUTTONS ── */

.btn {
    display: inline-block;
    background: #2986d2;
    color: #ffffff;
    padding: 1rem 2rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.2s;
}

.btn:hover {
    background: #1565a8;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(41, 134, 210, 0.35);
}

.btn-outline {
    display: inline-block;
    background: transparent;
    color: #fff;
    padding: 1rem 2rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.6);
    transition: all 0.2s;
}

.btn-outline:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.15);
}

.btn-dark {
    background: #1565a8;
    color: #fff;
}

.btn-dark:hover {
    background: #0d4f8c;
}

/* ── TRUST BAR ── */

.trust-bar {
    background: #2986d2;
    padding: 0.9rem 5%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-weight: 700;
    font-size: 0.82rem;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ── SECTION BASE ── */

section {
    padding: 88px 5%;
}

.section-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--sky);
    margin-bottom: 0.6rem;
}

h2.section-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(2rem, 3.5vw, 3rem);
    color: var(--deep);
    letter-spacing: 1px;
    margin-bottom: 1rem;
    line-height: 1.05;
}

p.section-intro {
    font-size: 1.02rem;
    color: var(--gray);
    max-width: 650px;
    line-height: 1.75;
    margin-bottom: 0.5rem;
}

/* ── DARK SECTION ── */

.dark {
    background: var(--deep);
}

.dark .section-label {
    color: var(--accent);
}

.dark h2.section-title {
    color: #fff;
}

.dark p.section-intro {
    color: rgba(255, 255, 255, 0.6);
}

/* ── LIGHT SECTION ── */

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

/* ── SERVICES GRID ── */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 1.4rem;
    margin-top: 2.8rem;
}

.service-card {
    background: var(--white);
    border-radius: 8px;
    padding: 2rem;
    color: var(--text);
    border: 1px solid var(--border);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--sky);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 40px rgba(26, 143, 209, 0.14);
}

.service-card:hover::after {
    transform: scaleX(1);
}

.service-icon {
    font-size: 2.4rem;
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--deep);
    margin-bottom: 0.5rem;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--gray);
    line-height: 1.65;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 1rem;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--sky);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ── WHY GRID ── */

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 1.5rem;
    margin-top: 2.8rem;
}

.why-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 1.75rem;
}

.why-card .icon {
    font-size: 1.9rem;
    margin-bottom: 0.9rem;
}

.why-card h3 {
    font-size: 0.98rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.45rem;
}

.why-card p {
    font-size: 0.86rem;
    color: rgba(255, 255, 255, 0.52);
    line-height: 1.65;
}

/* ── CITIES GRID ── */

.cities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
    gap: 0.7rem;
    margin-top: 2.2rem;
}

.city-pill {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.7rem 1rem;
    text-align: center;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--navy);
    transition: all 0.2s;
}

.city-pill:hover {
    background: var(--sky);
    color: #fff;
    border-color: var(--sky);
}

/* ── REVIEWS ── */

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 1.4rem;
    margin-top: 2.8rem;
}

.review-card {
    background: var(--white);
    border-radius: 8px;
    padding: 1.75rem;
    box-shadow: 0 2px 18px rgba(0, 0, 0, 0.07);
}

.stars {
    color: var(--accent);
    font-size: 1rem;
    letter-spacing: 2px;
    margin-bottom: 0.8rem;
}

.review-text {
    font-size: 0.91rem;
    color: var(--gray);
    line-height: 1.65;
    margin-bottom: 1rem;
    font-style: italic;
}

.reviewer {
    font-weight: 700;
    font-size: 0.87rem;
    color: var(--deep);
}

.review-location {
    font-size: 0.78rem;
    color: var(--gray);
    margin-top: 2px;
}

/* ── FAQ ── */

.faq-list {
    margin-top: 2.4rem;
    max-width: 820px;
}

.faq-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.faq-item summary {
    font-weight: 600;
    font-size: 0.98rem;
    cursor: pointer;
    color: var(--deep);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
    gap: 1rem;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--sky);
    flex-shrink: 0;
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 0 1.2rem;
    font-size: 0.94rem;
    color: var(--gray);
    line-height: 1.75;
}

/* ── PROCESS STEPS ── */

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 1.4rem;
    margin-top: 2.6rem;
}

.process-step {
    background: var(--white);
    border-radius: 8px;
    padding: 1.6rem;
    border: 1px solid var(--border);
}

.step-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2.2rem;
    color: var(--sky);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.process-step h3 {
    font-size: 0.94rem;
    font-weight: 700;
    color: var(--deep);
    margin-bottom: 0.4rem;
}

.process-step p {
    font-size: 0.84rem;
    color: var(--gray);
    line-height: 1.65;
}

/* ── TWO COL ── */

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
    align-items: start;
}

.two-col.photos-left {
    grid-template-columns: 55% 1fr;
}

/* ── CHECKLIST ── */

ul.checklist {
    list-style: none;
    margin-top: 1.2rem;
}

ul.checklist li {
    padding: 0.55rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    font-size: 0.94rem;
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    line-height: 1.5;
}

ul.checklist li::before {
    content: '✅';
    flex-shrink: 0;
    margin-top: 1px;
}

.dark ul.checklist li {
    border-color: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.8);
}

/* ── NEARBY PILLS ── */

.nearby {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1.5rem;
}

.nearby a {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.5rem 1rem;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--deep);
    transition: all 0.2s;
}

.nearby a:hover {
    background: var(--sky);
    color: #fff;
}

/* ── HERO (generic) ── */

.hero {
    background: linear-gradient(135deg, #1565a8 0%, #2986d2 60%, #5aaee8 100%);
    padding: 80px 5% 88px;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.025'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/svg%3E");
}

.hero-inner {
    position: relative;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: #ffffff;
    padding: 0.4rem 1.1rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1.4rem;
}

.hero h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 7vw, 6rem);
    color: #fff;
    line-height: 0.95;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
}

.hero h1 em {
    color: #ffffff;
    font-style: normal;
    opacity: 0.95;
}

.hero p.hero-sub {
    font-size: 1.12rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 560px;
    line-height: 1.72;
    margin-bottom: 2.4rem;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-top: 3.5rem;
    flex-wrap: wrap;
}

.stat-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2.6rem;
    color: #ffffff;
    line-height: 1;
}

.stat-label {
    font-size: 0.76rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 2px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ── CTA BAND ── */

.cta-band {
    background: linear-gradient(90deg, #2986d2 0%, #1565a8 100%);
    padding: 72px 5%;
    text-align: center;
    color: #fff;
}

.cta-band h2 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(1.8rem, 3.5vw, 3rem);
    color: #fff;
    letter-spacing: 2px;
    margin-bottom: 0.9rem;
}

.cta-band p {
    color: rgba(255, 255, 255, 0.78);
    font-size: 1.05rem;
    margin-bottom: 2rem;
}

.cta-phones {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.cta-phone {
    background: rgba(255, 255, 255, 0.11);
    color: #fff;
    padding: 0.85rem 1.6rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.28);
    transition: all 0.2s;
}

.cta-phone small {
    display: block;
    font-size: 0.68rem;
    font-weight: 400;
    opacity: 0.75;
    margin-top: 2px;
}

.cta-phone:hover {
    background: var(--accent);
    color: var(--deep);
    border-color: var(--accent);
}

/* ── FOOTER ── */

footer {
    background: #1565a8;
    padding: 64px 5% 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    color: #fff;
    letter-spacing: 2px;
    margin-bottom: 0.75rem;
}

.footer-brand p {
    font-size: 0.87rem;
    color: rgba(255, 255, 255, 0.45);
    line-height: 1.72;
}

.footer-col h4 {
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.45rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.45);
    font-size: 0.87rem;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.35);
}

.footer-bottom a {
    color: var(--accent);
}

/* ── CONTACT FORM ── */

.contact-form {
    background: var(--white);
    border-radius: 10px;
    padding: 2.5rem;
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.08);
    max-width: 640px;
}

.form-group {
    margin-bottom: 1.4rem;
}

.form-group label {
    display: block;
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--deep);
    margin-bottom: 0.45rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1.5px solid #dce4ed;
    border-radius: 4px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.95rem;
    color: var(--text);
    transition: border-color 0.2s;
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--sky);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-submit {
    background: var(--accent);
    color: var(--deep);
    border: none;
    padding: 1rem 2rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    width: 100%;
    transition: all 0.2s;
    font-family: 'DM Sans', sans-serif;
}

.form-submit:hover {
    background: #e8960f;
}

/* ── ABOUT ── */

.about-highlight {
    background: #2986d2;
    color: #ffffff;
    border-radius: 8px;
    padding: 1.75rem;
    margin-top: 1.5rem;
}

.about-highlight h3 {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.4rem;
    color: #ffffff;
}

.about-highlight p {
    font-size: 0.9rem;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.9);
}

/* ── RESPONSIVE ── */

@media (max-width: 960px) {
    .two-col {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .nav-mobile-toggle {
        display: block;
    }
    .hero-stats {
        gap: 1.5rem;
    }
    .trust-bar {
        gap: 0.6rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    .trust-item {
        font-size: 0.78rem;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    section {
        padding: 48px 5%;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }
    .why-grid {
        grid-template-columns: 1fr;
    }
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    .process-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hero h1 {
        font-size: clamp(2.4rem, 9vw, 4rem);
    }
    .hero-btns {
        flex-direction: column;
    }
    .hero-btns a {
        text-align: center;
    }
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    h2.section-title {
        font-size: clamp(1.6rem, 5vw, 2.4rem);
    }
    .faq-list {
        margin-top: 1.5rem;
    }
    .cities-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

@media (max-width: 520px) {
    .footer-top {
        grid-template-columns: 1fr;
    }
    .cta-phones {
        flex-direction: column;
        align-items: center;
    }
    .process-grid {
        grid-template-columns: 1fr;
    }
    section {
        padding: 40px 4%;
    }
    .why-card {
        padding: 1.25rem;
    }
    .service-card {
        padding: 1.5rem;
    }
    nav {
        padding: 0 4%;
    }
}