/* ========================================
   CVS HVAC — Central Ventilation Systems
   Professional industrial HVAC style
   ======================================== */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Open+Sans:wght@400;500;600;700&display=swap');

:root{
    --orange:#f26122;
    --orange-dark:#d95520;
    --navy:#1a2b4a;
    --navy-dark:#0f1a2e;
    --blue:#2c5aa0;
    --white:#ffffff;
    --gray-50:#f8f9fa;
    --gray-100:#f1f3f5;
    --gray-200:#e9ecef;
    --gray-300:#dee2e6;
    --gray-500:#6c757d;
    --gray-700:#495057;
    --gray-900:#212529;

    --ff-heading:'Montserrat',system-ui,sans-serif;
    --ff-body:'Open Sans',system-ui,sans-serif;

    --ease:cubic-bezier(.4,0,.2,1);
    --shadow:0 4px 20px rgba(0,0,0,.1);
    --shadow-lg:0 10px 40px rgba(0,0,0,.15);
    --radius:6px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--ff-body);font-size:16px;line-height:1.7;color:var(--gray-700);background:var(--white);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:all .3s var(--ease)}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}
::selection{background:var(--orange);color:#fff}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

h1,h2,h3,h4{font-family:var(--ff-heading);color:var(--navy);line-height:1.3}
h1{font-size:clamp(2rem,4.5vw,3rem);font-weight:700}
h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:700}
h3{font-size:clamp(1.1rem,2vw,1.3rem);font-weight:600}
.label{display:inline-block;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;color:var(--orange);margin-bottom:8px}
.highlight{color:var(--orange)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;font-family:var(--ff-heading);font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;border:2px solid transparent;border-radius:var(--radius);transition:all .3s var(--ease)}
.btn--orange{background:var(--orange);color:var(--white);border-color:var(--orange)}
.btn--orange:hover{background:var(--orange-dark);border-color:var(--orange-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn--navy{background:var(--navy);color:var(--white);border-color:var(--navy)}
.btn--navy:hover{background:var(--navy-dark)}
.btn--outline{background:transparent;color:var(--navy);border-color:var(--navy)}
.btn--outline:hover{background:var(--navy);color:var(--white)}
.btn--white{background:var(--white);color:var(--navy);border-color:var(--white)}
.btn--white:hover{background:var(--gray-100)}
.btn--full{width:100%}
.btn--sm{padding:10px 20px;font-size:.8rem}

/* ========== HEADER ========== */
.header{position:fixed;top:0;left:0;right:0;z-index:900;background:var(--white);box-shadow:var(--shadow);transition:all .4s var(--ease)}
.header__top{background:var(--navy);padding:8px 0;font-size:.8rem;color:rgba(255,255,255,.85)}
.header__top-inner{display:flex;justify-content:space-between;align-items:center}
.header__top a{color:var(--white);margin-left:20px}
.header__top a:hover{color:var(--orange)}
.header__main{padding:16px 0}
.header__inner{display:flex;align-items:center;justify-content:space-between}
.header__logo{font-family:var(--ff-heading);font-size:1.6rem;font-weight:800;color:var(--navy)}
.header__logo span{color:var(--orange)}
.header__nav{display:flex;align-items:center;gap:28px}
.header__nav a{font-family:var(--ff-heading);font-size:.85rem;font-weight:600;color:var(--gray-700);text-transform:uppercase;letter-spacing:.5px}
.header__nav a:hover{color:var(--orange)}
.header__cta .btn{padding:10px 24px}
.header__burger{display:none;background:none;border:none;width:28px;height:20px;position:relative;z-index:10}
.header__burger span{display:block;width:100%;height:2px;background:var(--navy);position:absolute;left:0;transition:all .3s var(--ease)}
.header__burger span:nth-child(1){top:0}
.header__burger span:nth-child(2){top:50%;transform:translateY(-50%)}
.header__burger span:nth-child(3){bottom:0}
.header__burger.active span:nth-child(1){top:50%;transform:translateY(-50%) rotate(45deg)}
.header__burger.active span:nth-child(2){opacity:0}
.header__burger.active span:nth-child(3){bottom:50%;transform:translateY(50%) rotate(-45deg)}

.mobile-nav{position:fixed;inset:0;top:110px;background:var(--white);z-index:800;display:flex;flex-direction:column;padding:24px;gap:0;opacity:0;pointer-events:none;transition:opacity .3s var(--ease)}
.mobile-nav.active{opacity:1;pointer-events:all}
.mobile-nav a{font-family:var(--ff-heading);font-size:1rem;font-weight:600;color:var(--navy);padding:16px 0;border-bottom:1px solid var(--gray-200);text-transform:uppercase}

/* ========== HERO ========== */
.hero{padding:180px 0 100px;position:relative;overflow:hidden;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-dark) 100%)}
.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='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%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/g%3E%3C/svg%3E")}
.hero__inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;position:relative;z-index:1}
.hero__content{color:var(--white)}
.hero__badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:8px 16px;border-radius:30px;font-size:.75rem;font-weight:600;color:var(--white);margin-bottom:20px;text-transform:uppercase;letter-spacing:1px}
.hero h1{color:var(--white);margin-bottom:16px}
.hero h1 span{color:var(--orange)}
.hero__sub{font-size:1.1rem;color:rgba(255,255,255,.75);margin-bottom:28px;line-height:1.8}
.hero__actions{display:flex;gap:12px;flex-wrap:wrap}
.hero__features{display:grid;grid-template-columns:1fr 1fr;gap:16px;background:rgba(255,255,255,.05);border-radius:var(--radius);padding:24px;border:1px solid rgba(255,255,255,.1)}
.hero__feature{display:flex;align-items:flex-start;gap:12px}
.hero__feature-icon{width:40px;height:40px;border-radius:var(--radius);background:var(--orange);display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
.hero__feature h4{color:var(--white);font-size:.9rem;margin-bottom:2px}
.hero__feature p{color:rgba(255,255,255,.6);font-size:.8rem;line-height:1.5}

/* ========== PAGE HERO ========== */
.page-hero{padding:160px 0 60px;text-align:center;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-dark) 100%);color:var(--white)}
.page-hero h1{color:var(--white);margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,.7);font-size:1.1rem}

/* ========== SECTIONS ========== */
.section{padding:80px 0}
.section--gray{background:var(--gray-50)}
.section--navy{background:var(--navy);color:var(--white)}
.section--navy h2,.section--navy h3{color:var(--white)}
.section--navy p{color:rgba(255,255,255,.75)}
.section__header{max-width:700px;margin-bottom:48px}
.section__header--center{text-align:center;margin-left:auto;margin-right:auto}
.section__header p{color:var(--gray-500);margin-top:12px}

/* ========== PRODUCTS ========== */
.products__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.product-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .4s var(--ease);border:1px solid var(--gray-200)}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--orange)}
.product-card__img{height:160px;background:linear-gradient(135deg,var(--gray-100),var(--gray-200));display:flex;align-items:center;justify-content:center;font-size:2.5rem;color:var(--navy)}
.product-card__img svg{color:var(--orange)}
.product-card__body{padding:20px}
.product-card h3{font-size:1rem;margin-bottom:6px}
.product-card p{font-size:.85rem;color:var(--gray-500);line-height:1.6}
.product-card__link{display:inline-flex;align-items:center;gap:4px;margin-top:12px;font-size:.8rem;font-weight:600;color:var(--orange);text-transform:uppercase}
.product-card__link:hover{gap:8px}

/* ========== FEATURES ========== */
.features__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.feature{text-align:center;padding:32px 24px;background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow)}
.feature__icon{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--orange),var(--orange-dark));display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:1.6rem;color:var(--white)}
.feature h3{margin-bottom:8px}
.feature p{font-size:.9rem;color:var(--gray-500)}

/* ========== PROJECTS ========== */
.projects__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.project-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .3s var(--ease)}
.project-card:hover{transform:translateY(-4px)}
.project-card__img{height:120px;background:linear-gradient(135deg,var(--navy),var(--blue));display:flex;align-items:center;justify-content:center;font-size:2rem;color:rgba(255,255,255,.3)}
.project-card__body{padding:16px}
.project-card h4{font-size:.9rem;color:var(--navy)}

/* ========== ABOUT ========== */
.about__grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about__img{background:linear-gradient(135deg,var(--navy),var(--blue));border-radius:var(--radius);height:400px;display:flex;align-items:center;justify-content:center}
.about__img-placeholder{font-size:4rem;color:rgba(255,255,255,.2)}
.about__text h2{margin-bottom:16px}
.about__text p{margin-bottom:16px;line-height:1.8}
.about__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px;padding-top:32px;border-top:1px solid var(--gray-200)}
.stat{text-align:center}
.stat__num{font-family:var(--ff-heading);font-size:2.2rem;font-weight:700;color:var(--orange);line-height:1}
.stat__label{font-size:.8rem;color:var(--gray-500);margin-top:4px}

/* ========== CONTACT ========== */
.contact__grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact__info h2{margin-bottom:16px}
.contact__info>p{color:var(--gray-500);margin-bottom:28px}
.contact__item{display:flex;gap:14px;margin-bottom:20px;align-items:flex-start}
.contact__item-icon{width:48px;height:48px;border-radius:var(--radius);background:var(--gray-100);display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:var(--orange);flex-shrink:0}
.contact__item h4{font-family:var(--ff-heading);font-weight:600;font-size:.85rem;color:var(--navy);margin-bottom:2px}
.contact__item p,.contact__item a{color:var(--gray-500);font-size:.9rem}
.contact__item a:hover{color:var(--orange)}
.contact__form{background:var(--gray-50);border-radius:var(--radius);padding:36px;border:1px solid var(--gray-200)}
.contact__form h2{margin-bottom:24px;font-size:1.5rem}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:.8rem;font-weight:600;color:var(--gray-700);margin-bottom:6px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 14px;border:1px solid var(--gray-300);border-radius:var(--radius);font-family:var(--ff-body);font-size:.95rem;background:var(--white);color:var(--gray-900);transition:border-color .3s,box-shadow .3s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(242,97,34,.15)}
.form-group textarea{resize:vertical;min-height:110px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}

/* ========== FOOTER ========== */
.footer{background:var(--navy-dark);padding:56px 0 28px;color:rgba(255,255,255,.7)}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer__brand{font-family:var(--ff-heading);font-size:1.4rem;font-weight:800;color:var(--white);margin-bottom:14px}
.footer__brand span{color:var(--orange)}
.footer__desc{font-size:.9rem;line-height:1.7}
.footer h4{font-family:var(--ff-heading);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;color:var(--white);margin-bottom:16px}
.footer__links a{display:block;padding:5px 0;font-size:.9rem;transition:color .2s}
.footer__links a:hover{color:var(--orange)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer__copy{font-size:.8rem;color:rgba(255,255,255,.4)}

/* ========== ANIMATIONS ========== */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}.reveal.visible{opacity:1;transform:none}

/* ========== RESPONSIVE ========== */
@media(max-width:1024px){
    .products__grid{grid-template-columns:repeat(2,1fr)}
    .projects__grid{grid-template-columns:repeat(2,1fr)}
    .features__grid{grid-template-columns:repeat(2,1fr)}
    .footer__grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    .header__top{display:none}
    .header__nav,.header__cta{display:none}
    .header__burger{display:block}
    .hero__inner{grid-template-columns:1fr}
    .hero__features{display:none}
    .products__grid,.projects__grid{grid-template-columns:1fr}
    .about__grid,.contact__grid{grid-template-columns:1fr}
    .features__grid{grid-template-columns:1fr}
    .footer__grid{grid-template-columns:1fr}
    .form-row{grid-template-columns:1fr}
    .about__stats{grid-template-columns:1fr;gap:16px}
    .hero__actions{flex-direction:column}
}