/* ========== Палітра та змінні ========== */
:root{
  --clr-primary: #FFD166;  /* Жовтий акцент */
  --clr-accent:  #0A2A36;  /* Глибокий синьо-зелений */
  --clr-bg:      #FFFFFF;
  --clr-surface: #F7F9FA;
  --clr-text:    #0D1B22;
  --clr-muted:   #5D6B74;
  --clr-border:  #E6ECF0;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: .25s ease;

  /* Аліаси для сторінки дякуємо */
  --dark-900: var(--clr-accent);
  --accent:   var(--clr-primary);
  --text-light: #FFFFFF;
}

/* ====== Reset & base ====== */
*, *::before, *::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior: smooth; }
body {
  font-family:'Manrope',sans-serif;
  background:var(--clr-bg);
  color:var(--clr-text);
  line-height:1.7;
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
h2{font-size:clamp(28px, 4vw, 40px);font-weight:800;text-align:center;margin-bottom:56px;color:var(--clr-text)}
.lead{max-width:780px;margin:0 auto 28px;color:var(--clr-muted)}

.link-underline{color:inherit;text-decoration:underline;text-decoration-color:rgba(13,27,34,.35);text-underline-offset:3px}

/* ===== Header ===== */
.header{
  position:sticky;top:0;left:0;right:0;
  background:rgba(255,255,255,.8);
  backdrop-filter:blur(12px);
  z-index:1000;
  border-bottom:1px solid var(--clr-border);
}
.nav-content{display:flex;justify-content:space-between;align-items:center;padding:14px 0}
.logo img{height:40px}

.nav-menu{display:flex;gap:32px;list-style:none}
.nav-menu a{color:var(--clr-text);text-decoration:none;font-weight:700;letter-spacing:.02em;transition:color var(--transition)}
.nav-menu a:hover{color:var(--clr-primary)}

.menu-toggle{display:none;flex-direction:column;gap:6px;background:none;border:0;cursor:pointer;padding:6px;border-radius:10px}
.menu-toggle:hover{background:rgba(0,0,0,.04)}
.menu-toggle span{width:26px;height:3px;background:var(--clr-text);transition:transform var(--transition)}

/* ===== Hero ===== */
.hero{
  min-height:78vh;
  display:flex;align-items:center;text-align:center;
  padding:120px 0 90px;
  background: radial-gradient(1200px 600px at 50% -10%, rgba(255, 209, 102,.18), transparent 60%), var(--clr-bg);
  color:var(--clr-text)
}
.hero-content h1{
  font-size:clamp(40px,6vw,68px);
  font-weight:800;
  max-width:900px;
  margin:0 auto 16px;
  line-height:1.1;
  letter-spacing:-.02em;
}
.cta-button,.cta-button-large{
  display:inline-block;background:var(--clr-primary);color:#111;
  padding:16px 34px;border-radius:999px;font-weight:800;text-decoration:none;
  transition:transform var(--transition),box-shadow var(--transition);border:none;cursor:pointer
}
.cta-button-large{font-size:18px;padding:20px 48px;background:var(--clr-accent);color:#fff}
.cta-button:hover{ transform:translateY(-2px); box-shadow:0 8px 20px rgba(255, 209, 102,.45); }
.cta-button-large:hover{ transform:translateY(-2px); box-shadow:0 8px 20px rgba(10, 42, 54,.28); }

/* ===== Clients ===== */
.clients-section{padding:72px 0;background:var(--clr-bg);text-align:center}
.clients-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:36px;align-items:center}
.clients-grid img{filter:grayscale(100%);opacity:.6;transition:all var(--transition)}
.clients-grid img:hover{filter:none;opacity:1}

/* ===== Services ===== */
.services-section{padding:90px 0;background:var(--clr-surface);color:var(--clr-text)}
.services-list{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  border:1px solid var(--clr-border);border-radius:var(--radius); overflow:hidden;
  background:#fff;
}
.service-item{
  padding:30px 26px;text-align:left;border-bottom:1px solid var(--clr-border);border-right:1px solid var(--clr-border);
  transition:background var(--transition)
}
.service-item:nth-child(odd){background:linear-gradient(180deg, #fff, #fff) padding-box}
.service-item:hover{background:#FAFCFD}
.service-item svg{width:44px;height:44px;margin:0 0 14px 0;fill:none;stroke:var(--clr-accent);stroke-width:2}
.service-item h3 { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
.service-item p  { font-size: 15px; color: var(--clr-muted); }

/* ===== About ===== */
.about-section{padding:90px 0;background:var(--clr-bg);color:var(--clr-text)}
.about-content{max-width:760px; margin: 0 auto; text-align: center;}
.about-content p{font-size:18px;margin-bottom:20px; line-height: 1.8;}

/* ===== Case studies ===== */
.case-studies-section{padding:90px 0;background:var(--clr-surface);color:var(--clr-text)}
.case-studies-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:28px}
.case-study-item{position:relative;aspect-ratio:4/3;overflow:hidden;border-radius:var(--radius);transition:transform var(--transition)}
.case-study-item img{width:100%;height:100%;object-fit:cover;transform:scale(1.03);transition:transform .6s ease}
.case-study-item:hover img{transform:scale(1.06)}
.case-study-item:hover{transform:translateY(-6px)}
.case-study-overlay{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  padding:26px;background:linear-gradient(0deg,rgba(0,0,0,.7) 0%,transparent 100%);color:#fff;
}
.case-study-overlay h3 { font-size: 22px; margin-bottom: 6px; }
.case-study-overlay p  { font-size: 15px; opacity:.95; }

/* ===== Philosophy & Values ===== */
.philosophy-section, .values-section{padding:90px 0;background:var(--clr-bg);color:var(--clr-text)}
.philosophy-quotes, .values-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:26px}
.quote-item, .value-item{
  padding:26px;border:1px solid var(--clr-border);border-radius:var(--radius-sm);
  background: #fff;
}
.quote-item blockquote{font-style:italic;margin-bottom:12px;font-size: 18px;color:var(--clr-text)}
.quote-item cite { font-weight: 800; color: var(--clr-accent); font-style: normal; letter-spacing:.02em }
.value-item h3 { margin-bottom: .5rem; font-size: 16px; letter-spacing:.04em }
.value-item p  { color: var(--clr-muted) }

.office-images{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:40px}
.office-images img { border-radius: var(--radius-sm); }

/* ===== Partners ===== */
.partners-section{padding:80px 0;background:var(--clr-surface);text-align:center}
.partners-grid{display:flex;gap:44px;justify-content:center;flex-wrap:wrap; align-items: center;}
.partners-grid img{max-height:45px;filter:grayscale(100%);opacity:.7;transition:all var(--transition)}
.partners-grid img:hover{filter:none;opacity:1}

/* ===== CTA ===== */
.cta-section{padding:90px 0;background:var(--clr-primary);text-align:center}
.cta-section h2 { color: #111; }
.cta-button-large { background: var(--clr-accent); color: #fff; }
.cta-button-large:hover { box-shadow:0 8px 22px rgba(10, 42, 54,.3); }

/* ===== Footer ===== */
.footer{background:var(--clr-accent);color:#fff;padding:70px 0 40px}
.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:40px;margin-bottom:40px}
.footer-section h3{font-size:18px;margin-bottom:18px}
.footer-section a{color:#fff;text-decoration:none;opacity:.9;transition:opacity var(--transition)}
.footer-section a:hover{opacity:1}
.social-links{display:flex;gap:12px;margin-top:18px}
.social-links a{
  width:40px;height:40px;display:grid;place-items:center;
  background:rgba(255,255,255,.1);border-radius:50%;font-size:14px;
  transition:background var(--transition);color:#fff;text-decoration:none
}
.social-links a:hover{background:rgba(255,255,255,.2)}
.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.2);padding-top:28px;font-size:14px; opacity: .85;}

/* ===== Responsive ===== */
@media (max-width:960px){
  .service-item{ text-align:left }
}

@media (max-width:768px){
  .nav-menu{
    position:absolute;top:100%;left:0;right:0;background:var(--clr-bg);
    flex-direction:column;padding:18px 20px;display:none;
    border-bottom: 1px solid var(--clr-border);
  }
  .nav-menu.active{display:flex}
  .menu-toggle{display:flex}
  .case-studies-grid{grid-template-columns: 1fr;}
  .hero{ padding:110px 0 70px }
}