/* styles.css — унікалізовано */
:root{
  --clr-primary:#1F6FEB;   /* Електричний синій */
  --clr-accent:#0D9488;    /* Бірюзовий акцент */
  --clr-bg:#F6F9FC;        /* Світлий нейтральний фон */
  --clr-surface:#ffffff;   /* Поверхні/картки */
  --clr-text:#0F172A;      /* Дуже темний текст */
  --radius:22px;
  --transition:.28s ease;
  --shadow:0 10px 30px rgba(31,111,235,.12);
  --font-main:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;
}

/* База */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-main);line-height:1.7;color:var(--clr-text);background:var(--clr-bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
ul{list-style:none}
a{color:inherit;text-decoration:none}

/* Контейнер */
.container{max-width:1160px;margin-inline:auto;padding-inline:20px}

/* Хедер */
.header{position:fixed;top:0;left:0;width:100%;background:rgba(255,255,255,.7);backdrop-filter:blur(10px);z-index:100;transition:box-shadow var(--transition)}
.header.shadow{box-shadow:0 8px 24px rgba(15,23,42,.08)}
.nav{display:flex;justify-content:space-between;align-items:center;padding-block:14px}
.logo img{height:36px}
.nav-menu{display:flex;gap:36px}
.nav-menu a{font-weight:600;position:relative;padding-bottom:4px}
.nav-menu a::after{content:'';position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--clr-primary);transition:width var(--transition)}
.nav-menu a:hover::after{width:100%}

/* Бургер */
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer}
.menu-toggle span{width:26px;height:3px;background:var(--clr-text);border-radius:3px;transition:all var(--transition)}

/* Герой */
.hero{background:linear-gradient(180deg,#F6F9FC 0%,#FFFFFF 100%);color:var(--clr-text);padding:170px 0 140px;text-align:center}
.hero-content{max-width:900px;margin-inline:auto}
.hero h1{font-size:clamp(2.4rem,5.5vw,4.2rem);font-weight:800;line-height:1.15;margin-bottom:18px}
.hero-sub{font-size:1.125rem;opacity:.8;margin-bottom:36px}
.cta-button{display:inline-block;background:var(--clr-primary);color:#fff;padding:16px 36px;border-radius:999px;font-weight:700;font-size:18px;transition:transform var(--transition),box-shadow var(--transition);box-shadow:0 10px 24px rgba(31,111,235,.25)}
.cta-button:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(31,111,235,.35)}

/* Секції */
.section-tag{font-size:13px;letter-spacing:1.8px;font-weight:800;text-transform:uppercase;margin-bottom:46px;text-align:center;color:var(--clr-accent)}
.services,.testimonials{padding:96px 0}
.about{padding:96px 0;background:var(--clr-surface);text-align:center}
.portfolio{background:var(--clr-surface);padding:96px 0}
.featured{background:var(--clr-bg);padding:96px 0 110px}

/* Сітки */
.services-grid,.projects-grid,.portfolio-items,.testimonials-grid{display:grid;gap:28px}
.services-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.projects-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));margin-top:28px}
.portfolio-items,.testimonials-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}

/* Карточки послуг */
.service-item{text-align:center;padding:38px 30px;border-radius:var(--radius);background:var(--clr-surface);box-shadow:var(--shadow);transition:transform var(--transition),box-shadow var(--transition)}
.service-item:hover{transform:translateY(-8px);box-shadow:0 16px 40px rgba(31,111,235,.16)}
.service-icon{margin-inline:auto;width:72px;height:72px;background:var(--clr-primary);border-radius:50%;display:grid;place-items:center;margin-bottom:22px}
.service-icon svg{width:40px;height:40px;stroke:#fff;fill:none;stroke-width:3}
.service-item h3{font-size:22px;font-weight:800;margin-bottom:8px}
.service-item p{font-size:16px;color:#475569}

/* Проєкти */
.project-card{display:block;border-radius:var(--radius);overflow:hidden;transition:transform var(--transition),box-shadow var(--transition);background:var(--clr-surface);box-shadow:var(--shadow)}
.project-card:hover{transform:translateY(-6px);box-shadow:0 18px 44px rgba(15,23,42,.12)}
.project-card img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.project-card:hover img{transform:scale(1.05)}
.project-info{padding:24px;background:var(--clr-surface)}
.project-info h3{font-size:22px;font-weight:800;margin-bottom:6px}
.project-info p{font-size:16px;color:#475569}

/* Портфоліо */
.portfolio-item{position:relative;border-radius:var(--radius);overflow:hidden;transition:box-shadow var(--transition)}
.portfolio-item:hover{box-shadow:0 16px 40px rgba(15,23,42,.15)}
.portfolio-item img{height:100%;object-fit:cover;transition:transform .4s}
.portfolio-item:hover img{transform:scale(1.08)}
.portfolio-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.78) 0%,transparent 68%);color:#fff;padding:22px;display:flex;flex-direction:column;justify-content:flex-end}
.portfolio-overlay h3{font-size:20px;font-weight:800;margin-bottom:6px}
.portfolio-overlay p{font-size:15px;opacity:.95}

/* Про нас */
.about p{font-size:18px;max-width:75ch;margin-inline:auto;margin-bottom:20px;color:#374151;line-height:1.85}

/* Відгуки */
.testimonial{background:var(--clr-surface);padding:28px;border-radius:var(--radius);box-shadow:var(--shadow);font-size:16px;color:#374151}
.stars{color:var(--clr-primary);font-size:20px;margin-bottom:10px}
.testimonial cite{display:block;margin-top:16px;font-style:normal;font-weight:700;color:#0F172A}

/* Футер */
.footer{background:linear-gradient(180deg,#0F172A 0%,#0B1220 100%);color:#fff;padding:78px 0 40px;text-align:center}
.footer-content{display:flex;flex-wrap:wrap;gap:44px;justify-content:space-around;align-items:center}
.footer-brand img{height:40px;margin-bottom:16px;filter:brightness(0) invert(1)}
.footer-brand p{font-size:16px;opacity:.9}
.footer-info h3{font-weight:800;font-size:22px;margin-bottom:12px}
.footer-info a{color:#E2E8F0;opacity:.88;transition:opacity var(--transition)}
.footer-info a:hover{opacity:1}
.social-links{display:flex;gap:14px;margin-top:22px;justify-content:center}
.social-links a{width:44px;height:44px;background:rgba(255,255,255,.08);border-radius:50%;display:grid;place-items:center;transition:background var(--transition)}
.social-links a:hover{background:var(--clr-accent)}
.social-links svg{width:22px;height:22px;fill:currentColor}
.footer-copy{text-align:center;font-size:14px;margin-top:56px;opacity:.7}

/* Анімації */
.fade-in{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.fade-in.is-visible{opacity:1;transform:translateY(0)}

/* Доступність: фокуси */
:focus-visible{outline:3px solid var(--clr-accent);outline-offset:2px;border-radius:6px}

/* Респонс */
@media (max-width:900px){
  .nav-menu{position:fixed;top:64px;right:-100%;flex-direction:column;background:var(--clr-surface);width:300px;height:calc(100vh - 64px);padding:36px;transition:right var(--transition);box-shadow:-8px 0 28px rgba(15,23,42,.08)}
  .nav-menu.active{right:0}
  .menu-toggle{display:flex}
  body.menu-open{overflow:hidden}
}
@media (max-width:600px){
  .hero{padding:140px 0 96px}
  .hero h1{font-size:2rem}
  .hero-sub{font-size:1rem}
}