/* =======================
   Variables & Reset
======================= */
:root{
  --primary-color:#2B5DF9;
  --primary-hover:#1f4bcc;
  --text-dark:#000;
  --text-muted:#6C6C6C;
  --bg-light:#EAECEE;
  --bg-form:#F3F4F7;
  --bg-footer:#F5F5F7;
  --border-radius:15px;
  --container-width:1200px;
  --spacing-sm:1rem;
  --spacing-md:2rem;
  --spacing-lg:3rem;
  --header-height:4rem;
  --ctrl:36px;
}

*{margin:0;padding:0;box-sizing:border-box}
img{max-width:100%;display:block}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:#fff; line-height:1.5; color:var(--text-dark);
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}

/* Header */
.header{
  position:sticky; top:0; left:0; right:0;
  max-width:var(--container-width); margin:0 auto;
  height:var(--header-height);
  display:flex; align-items:center; justify-content:space-between;
  padding:0 var(--spacing-sm); background:#fff; z-index:1000;
}
.skip-link{position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden}
.skip-link:focus{position:static; width:auto; height:auto; padding:.25rem .5rem; border:1px dashed var(--primary-color); background:#fff; border-radius:.5rem; margin-right:.5rem}

.logo{display:flex;align-items:center;gap:.5rem;text-decoration:none}
.logo-icon{width:1.125rem;height:1.125rem}
.logo-text{font-size:1.3125rem;font-weight:600;color:var(--primary-color)}

.nav{display:flex;gap:2.5rem}
.nav a{text-decoration:none;font-size:1rem;font-weight:300;color:var(--text-dark);transition:color .2s}
.nav a[aria-current="true"]{color:var(--primary-color)}
.nav a:hover,.nav a:focus-visible{color:var(--primary-color);outline:none}

/* Header button */
.btn-request{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:var(--ctrl); padding:0 14px; background:#fff;
  border:1.5px solid var(--primary-color); border-radius:var(--border-radius);
  color:var(--primary-color); font-size:1rem; line-height:1; text-decoration:none;
  width:max-content; transition:background-color .2s,color .2s,opacity .2s,border-color .2s;
}
.btn-request--hidden{opacity:0;pointer-events:none}
.btn-request:hover,.btn-request:focus-visible{background:var(--primary-color);color:#fff;outline:none}

/* Burger */
.menu-toggle{display:none;background:transparent;border:1.5px solid var(--text-dark);border-radius:.75rem;padding:.25rem .5rem;line-height:1}

/* Main */
main{display:block}

/* Hero */
.hero{
  max-width:var(--container-width); margin:0 auto;
  padding:6.25rem var(--spacing-sm) 3.125rem;
  display:flex; flex-direction:column; align-items:center; text-align:center;
}
.hero-content h1{font-size:3rem;font-weight:900;line-height:1.2;margin-bottom:var(--spacing-md)}
.hero-content p{font-size:1rem;font-weight:300;color:var(--text-muted);margin-bottom:var(--spacing-lg)}

.btn-primary{
  padding:.625rem 1.5625rem; background:var(--primary-color);
  border-radius:var(--border-radius); color:#fff; font-size:1rem; font-weight:400;
  text-decoration:none; transition:background-color .2s;
}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--primary-hover);outline:none}

.hero-image img{border-radius:.75rem;margin-top:var(--spacing-lg);object-fit:cover}

/* Services */
.services{max-width:var(--container-width);margin:0 auto;padding:3.125rem var(--spacing-sm);text-align:center}
.services h2{font-size:3rem;font-weight:800;margin-bottom:var(--spacing-lg)}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(20rem,1fr));gap:var(--spacing-md)}

.service-card{
  background:var(--bg-light);
  border-radius:var(--border-radius);
  padding:var(--spacing-md);
  text-align:left;
  display:flex;flex-direction:column;gap:.5rem;
  min-height:9.375rem;
  transition:transform .18s ease, box-shadow .18s ease, background-color .18s ease;
  cursor:pointer; /* для кликабельности */
}
.service-title{font-size:1.25rem;font-weight:600}
.service-desc{font-size:1rem;font-weight:300;color:var(--text-dark)}
.service-meta{font-size:.9rem;font-weight:300;color:var(--text-muted)}
.service-card:hover,.service-card:focus-within{
  transform:translateY(-2px);
  box-shadow:0 8px 18px rgba(0,0,0,.06);
  background:#EEF1F7;
}

/* About */
.about{max-width:var(--container-width);margin:0 auto;padding:3.125rem var(--spacing-sm);text-align:center}
.about h2{font-size:3rem;font-weight:800;margin-bottom:var(--spacing-lg)}
.about-card{background:var(--bg-light);border-radius:var(--border-radius);padding:1.5rem 3.125rem;text-align:justify}
.about-card p{font-size:1rem;font-weight:300;margin-bottom:var(--spacing-md)}

/* Reviews */
.reviews{max-width:var(--container-width);margin:0 auto;padding:3.125rem var(--spacing-sm);text-align:center}
.reviews h2{font-size:3rem;font-weight:800;margin-bottom:var(--spacing-lg)}
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(20rem,1fr));gap:var(--spacing-md)}
.review-card{background:var(--bg-light);border-radius:var(--border-radius);padding:var(--spacing-md);text-align:justify}
.review-card h3{font-size:1.15rem;font-weight:400;margin-bottom:.5rem}
.review-card p:first-of-type{font-size:1rem;font-weight:400;margin-bottom:.9375rem}
.review-card p:last-of-type{font-size:1rem;font-weight:300;line-height:1.5}

/* Contacts */
.contacts{max-width:var(--container-width);margin:0 auto;padding:3.125rem var(--spacing-sm);text-align:center}
.contacts h2{font-size:3rem;font-weight:800;margin-bottom:var(--spacing-lg)}
.contacts-info{display:flex;flex-direction:column;align-items:center;gap:calc(var(--spacing-md)/2)}
.contact-item a{font-size:1.25rem;font-weight:300;color:var(--text-dark);text-decoration:none;transition:color .2s}
.contact-item a:hover,.contact-item a:focus-visible{color:var(--primary-color);outline:none}
.contact-image{display:flex;justify-content:center;gap:var(--spacing-md);margin-top:calc(var(--spacing-md)/2)}
.contact-image img{width:3.125rem;height:3.125rem;cursor:pointer;transition:transform .2s}
.contact-image img:hover,.contact-image img:focus-visible{transform:scale(1.1)}

/* Form */
.form-section{max-width:var(--container-width);margin:0 auto;padding:3.125rem var(--spacing-sm)}
.form-container{max-width:25rem;margin:0 auto;text-align:center}
.form-section h2{font-size:3rem;font-weight:800;margin-bottom:var(--spacing-md)}

.form-panel{background:var(--bg-light);border-radius:var(--border-radius);padding:1.25rem 1.25rem 1.5rem;display:flex;flex-direction:column;gap:1.5rem}
.form-subtitle{font-size:1rem;font-weight:300;color:var(--text-muted);margin-bottom:var(--spacing-sm)}

.form-group input,.form-group textarea{
  width:100%;background:#fff;border-radius:var(--border-radius);border:none;
  font-size:1rem;font-weight:300;color:var(--text-dark);
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  line-height:1.4;height:2.75rem;padding:.75rem 1.25rem;
}
.form-group textarea{height:5rem;resize:none}
.form-group input:focus-visible,.form-group textarea:focus-visible{outline:2px solid var(--primary-color)}
.form-group input:invalid:focus:not(:placeholder-shown){outline:2px solid #e74c3c}

/* Floating labels */
.float-field{position:relative}
.float-field label{
  position:absolute;left:1.25rem;top:50%;transform:translateY(-50%);
  font-size:1rem;color:var(--text-muted);pointer-events:none;
  transition:transform .15s,font-size .15s,top .15s,color .15s,background-color .15s;
  background:transparent;opacity:1;
}
.float-field input::placeholder,.float-field textarea::placeholder{opacity:1;color:var(--text-muted)}
.float-field input:focus + label,
.float-field textarea:focus + label,
.float-field input:not(:placeholder-shown) + label,
.float-field textarea:not(:placeholder-shown) + label{
  top:-.55rem; transform:translateY(-50%); font-size:.75rem; color:var(--text-dark);
  background:var(--bg-light); padding:0 .25rem; border-radius:.25rem;
}
.float-area label{top:.9rem;transform:none}
.float-area textarea{height:80px;padding-top:1.125rem}

.form-bottom{
  display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:1rem;margin-top:var(--spacing-lg)
}
.form-policy{font-size:.75rem;font-weight:300;color:var(--text-muted);text-align:left;flex:1}
.form-policy a{color:var(--primary-color);text-decoration:none}
.form-policy a:hover,.form-policy a:focus-visible{text-decoration:underline;outline:none}
.form-container button{
  background:var(--primary-color);color:#fff;font-size:1.0625rem;font-weight:300;border:none;
  border-radius:var(--border-radius);padding:.625rem 1.5625rem;cursor:pointer;transition:background-color .2s;white-space:nowrap;
}
.form-container button:hover,.form-container button:focus-visible{background:var(--primary-hover);outline:none}

/* Footer */
.footer{background:var(--bg-footer);display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:.75rem 1rem;text-align:center;}
.footer-item{display:flex;gap:1.875rem;color:var(--text-muted);font-size:.75rem;font-weight:300;max-width:800px;}
.footer-link{color:var(--text-muted);text-decoration:underline;}
.footer-link:hover,.footer-link:focus-visible{color:var(--primary-color);text-decoration:underline;}
.footer-company{display:flex;gap:1.875rem;flex-wrap:wrap;justify-content:center;color:var(--text-muted);font-size:.75rem;font-weight:300;}

/* Utilities */
.nowrap{white-space:nowrap}
@media (max-width:1024px){.nowrap{white-space:normal}}

/* Responsive */
@media (max-width:1024px){.nav{gap:1.25rem}}

@media (max-width:768px){
  .header{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:.5rem;height:auto;padding:.5rem .75rem}
  .logo-text{display:none}
  .logo-icon{width:1.5rem;height:1.5rem}
  .btn-request{grid-column:2;justify-self:end}
  .menu-toggle{display:inline-flex;width:var(--ctrl);height:var(--ctrl);align-items:center;justify-content:center;border-width:1.5px;font-size:18px}

  .nav{position:absolute;top:100%;left:0;right:0;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.06);padding:.75rem 1rem;flex-direction:column;gap:1rem;display:none}
  .nav.nav--open{display:flex}
  .nav a{font-size:1rem}

  .hero-content h1{font-size:2rem}
  .services h2,.about h2,.reviews h2,.contacts h2,.form-section h2{font-size:2rem}
  .form-container{max-width:100%;padding:0 var(--spacing-sm)}

  .form-bottom{flex-direction:column;align-items:stretch;gap:1rem}
  .form-container button{width:100%;order:-1}
  .form-policy{order:0;text-align:left}
}

/* default: hide mobile-only br */
.br-m{display:none}

@media (max-width:480px){
  .btn-primary,.btn-request{font-size:1rem;padding:.5rem 1rem}
  .services-grid,.reviews-grid{grid-template-columns:1fr}
  .contact-item a{font-size:1.15rem}
  .contact-image img{width:2.5rem;height:2.5rem}

  .br-m{display:block}
  .footer{flex-direction:column;gap:.5rem;text-align:center}
  .footer-item{flex-direction:column;gap:.5rem}
  .footer-company{flex-direction:column;gap:.5rem}
}

/* Motion */
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* Tiny spacing refinements */
.form-group:last-of-type{margin-bottom:8px}
.form-panel .form-group:last-of-type{margin-bottom:.25rem}
.form-panel .form-bottom{margin-top:.5rem}



/* Error messages appear as separate rows (no layout shift inside fields) */
.error-message{display:none;font-size:.9rem;color:#e53935;text-align:left;line-height:1.25;white-space:pre-line}
.error-message.is-visible{display:block;margin:-.5rem 0 .25rem 0} /* slight tuck-up under input */

/* Success state after form submit */
.form-success {max-width: 800px;margin: 0 auto;background: var(--bg-light);border-radius: var(--border-radius);padding: 2rem;text-align: center;}
.form-success h3 {font-size: 1.5rem;font-weight: 800;margin-bottom: .5rem;}
.form-success p {font-size: 1rem;font-weight: 300;}