/* pro4tech — публичный сайт.
   Идея: площадка в момент «блэкаута» перед шоу. Глубокий сине-фиолетовый фон сцены,
   а цвет дают только «светодиоды»: маджента, циан и янтарь — три канала RGB-ленты. */

:root {
  --stage: #100d26;       /* фон сцены */
  --deck: #17123a;        /* поверхность */
  --riser: #221b55;       /* приподнятый блок */
  --truss: #3a3180;       /* линии, рамки */
  --text: #ebe8ff;
  --muted: #a29cd6;
  --magenta: #ff3d8b;
  --cyan: #3fe0ff;
  --amber: #ffb43c;
  --display: 'Unbounded', 'Arial Black', system-ui, sans-serif;
  --body: 'Manrope', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--stage); color: var(--text); font: 400 17px/1.6 var(--body); }
img, svg, canvas { display: block; max-width: 100%; }
a { color: var(--cyan); text-underline-offset: 3px; }
a:hover { color: #9cefff; }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.12; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(34px, 6.2vw, 72px); font-weight: 700; }
h2 { font-size: clamp(26px, 3.6vw, 42px); font-weight: 600; }
h3 { font-size: 20px; font-weight: 600; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--amber); color: #000; padding: 8px 14px; }
.lede { font-size: clamp(18px, 1.6vw, 20px); color: var(--muted); max-width: 60ch; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- Кнопки ---------- */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 22px; border-radius: 999px; border: 0;
  font: 700 16px/1 var(--body); text-decoration: none; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s; }
.btn:active { transform: translateY(1px); }
.btn-light { background: var(--text); color: var(--stage); box-shadow: 0 0 0 0 rgba(255,61,139,0); }
.btn-light:hover { color: var(--stage); box-shadow: 0 0 28px 2px rgba(255,61,139,.55), 0 0 60px rgba(63,224,255,.25); }
.btn-ghost { background: transparent; color: var(--text); box-shadow: inset 0 0 0 1.5px var(--truss); }
.btn-ghost:hover { color: var(--text); box-shadow: inset 0 0 0 1.5px var(--cyan); }
.btn svg { width: 18px; height: 18px; }

/* ---------- Шапка ---------- */
.top { position: sticky; top: 0; z-index: 30; background: rgba(16,13,38,.82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(58,49,128,.5); }
.top .wrap { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font: 700 19px var(--display); letter-spacing: -.02em; }
.brand img { width: 34px; height: 34px; }
.brand:hover { color: var(--text); }
.nav { display: flex; gap: 22px; margin-left: 8px; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.nav a:hover, .nav a[aria-current] { color: var(--text); }
.top-right { margin-left: auto; display: flex; align-items: center; gap: 18px; }
.top-phone { color: var(--text); text-decoration: none; font-weight: 700; white-space: nowrap; }
.top-login { color: var(--muted); font-weight: 600; font-size: 15px; text-decoration: none; padding: 8px 14px; border-radius: 999px; box-shadow: inset 0 0 0 1.5px var(--truss); }
.top-login:hover { color: var(--text); box-shadow: inset 0 0 0 1.5px var(--cyan); }
.burger { display: none; margin-left: auto; background: none; border: 0; color: var(--text); width: 44px; height: 44px; cursor: pointer; }
.burger span { display: block; height: 2px; background: currentColor; margin: 6px 10px; border-radius: 2px; }
@media (max-width: 920px) {
  .nav, .top-phone { display: none; }
  .burger { display: block; margin-left: 4px; }
  .top-right { margin-left: auto; }
  .top.open .nav { display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: var(--stage);
    padding: 16px var(--gutter) 24px; gap: 4px; border-bottom: 1px solid var(--truss); margin: 0; }
  .top.open .nav a { padding: 10px 0; font-size: 18px; }
}

/* ---------- Hero: световая стена ---------- */
.hero { position: relative; overflow: hidden; min-height: min(86vh, 760px); display: flex; align-items: flex-end; isolation: isolate; }
.wall { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; cursor: crosshair; }
.hero::after { content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(90deg, rgba(16,13,38,.92) 0%, rgba(16,13,38,.7) 45%, rgba(16,13,38,.05) 85%),
              linear-gradient(0deg, var(--stage) 0%, rgba(16,13,38,0) 35%); }
.hero .wrap { width: 100%; padding-top: 96px; padding-bottom: 64px; }
.hero h1 { max-width: 15ch; text-wrap: balance; }
.hero .lede { color: #c9c4f2; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.wall-hint { margin-top: 28px; color: var(--muted); font-size: 14px; display: flex; align-items: center; gap: 8px; }
.wall-hint::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--magenta); box-shadow: 0 0 10px var(--magenta); }
@media (hover: none) { .wall-hint { display: none; } }

/* Технический райдер — цифры одной строкой */
.rider { border-top: 1px solid var(--truss); border-bottom: 1px solid var(--truss); background: var(--deck); }
.rider .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.rider .wrap > div { padding: 22px 20px 20px 0; }
.rider .wrap > div + div { padding-left: 24px; border-left: 1px solid var(--truss); }
.rider b { display: block; font: 700 clamp(22px, 2.6vw, 30px)/1.1 var(--display); }
.rider span { color: var(--muted); font-size: 14px; }
@media (max-width: 720px) {
  .rider .wrap { grid-template-columns: 1fr 1fr; }
  .rider .wrap > div:nth-child(3) { border-left: 0; padding-left: 0; }
  .rider .wrap > div:nth-child(n+3) { border-top: 1px solid var(--truss); }
}

/* ---------- Секции ---------- */
.sec { padding: clamp(64px, 9vw, 120px) 0; }
.sec-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 40px; flex-wrap: wrap; }
.sec-head h2 { margin: 0; max-width: 20ch; }
.sec-head p { color: var(--muted); max-width: 46ch; margin: 0; }

/* Два направления: сеть и свет */
.duo { display: grid; grid-template-columns: 1.15fr 1fr; gap: 0; border: 1px solid var(--truss); border-radius: 28px; overflow: hidden; }
.duo > div { padding: clamp(24px, 4vw, 48px); }
.duo .net { background: var(--deck); }
.duo .light { background: radial-gradient(120% 90% at 100% 0%, rgba(255,61,139,.22), transparent 60%), radial-gradient(90% 80% at 0% 100%, rgba(255,180,60,.16), transparent 60%), var(--riser); }
.duo h3 { font-size: clamp(22px, 2.4vw, 30px); margin-bottom: 12px; }
.duo p { color: #c9c4f2; }
.duo figure { margin: 28px 0 0; }
.strip { display: flex; gap: 6px; margin: 30px 0 8px; height: 26px; }
.strip i { flex: 1; border-radius: 4px; background: hsl(var(--h) 100% 62%); box-shadow: 0 0 14px hsl(var(--h) 100% 60% / .8); animation: chase 3.2s linear infinite; animation-delay: calc(var(--n) * -0.12s); }
@keyframes chase { 0%, 100% { opacity: .25; } 18% { opacity: 1; } 40% { opacity: .35; } }
@media (prefers-reduced-motion: reduce) { .strip i { animation: none; opacity: .85; } }
.ticks { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.ticks li { display: grid; grid-template-columns: 22px 1fr; gap: 10px; color: #d8d4fa; }
.ticks svg { width: 20px; height: 20px; color: var(--cyan); margin-top: 3px; }
.light .ticks svg { color: var(--amber); }
@media (max-width: 860px) { .duo { grid-template-columns: 1fr; } }

/* Список услуг — строки прайса */
.rows { border-top: 1px solid var(--truss); }
.row { display: grid; grid-template-columns: 56px 1.1fr 1.6fr auto; gap: 24px; align-items: center; padding: 26px 0;
  border-bottom: 1px solid var(--truss); color: var(--text); text-decoration: none; }
.row:hover { color: var(--text); background: linear-gradient(90deg, rgba(63,224,255,.06), transparent 70%); }
.row .ico { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: var(--deck); box-shadow: inset 0 0 0 1px var(--truss); }
.row .ico svg { width: 26px; height: 26px; }
.row[data-cat=internet] .ico { color: var(--cyan); }
.row[data-cat=led] .ico { color: var(--magenta); }
.row[data-cat=tech] .ico { color: var(--amber); }
.row h3 { margin: 0; }
.row h3 small { display: block; font: 500 14px var(--body); color: var(--muted); margin-top: 6px; letter-spacing: 0; }
.row p { margin: 0; color: #c9c4f2; }
.row .price { font-weight: 700; white-space: nowrap; }
@media (max-width: 860px) {
  .row { grid-template-columns: 48px 1fr; gap: 12px 16px; }
  .row p, .row .price { grid-column: 2; }
}

/* Процесс — настоящая последовательность, поэтому номера */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); counter-reset: s; gap: 0; }
.steps li { counter-increment: s; padding: 0 22px 0 0; position: relative; }
.steps li::before { content: counter(s); display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  font: 700 17px var(--display); color: var(--stage); background: var(--text); margin-bottom: 18px; position: relative; z-index: 1; }
.steps li::after { content: ''; position: absolute; top: 22px; left: 44px; right: 0; height: 2px;
  background: repeating-linear-gradient(90deg, var(--truss) 0 6px, transparent 6px 12px); }
.steps li:last-child::after { display: none; }
.steps h3 { font-size: 17px; }
.steps p { color: var(--muted); font-size: 15px; }
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; gap: 26px; }
  .steps li { padding: 0 0 0 62px; }
  .steps li::before { position: absolute; left: 0; top: -6px; }
  .steps li::after { left: 21px; top: 44px; bottom: -26px; right: auto; width: 2px; height: auto;
    background: repeating-linear-gradient(180deg, var(--truss) 0 6px, transparent 6px 12px); }
}

/* Кейсы */
.cases { display: grid; gap: 18px; }
.case { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; padding: clamp(22px, 3vw, 36px); border-radius: 24px; background: var(--deck);
  border: 1px solid var(--truss); }
.case[data-cat=led] { border-color: rgba(255,61,139,.4); }
.case-meta { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.case h3 { font-size: clamp(20px, 2vw, 24px); }
.case p { color: #c9c4f2; margin: 0; }
.case-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; align-content: center; }
.case-stats div { border-left: 2px solid var(--cyan); padding-left: 12px; }
.case[data-cat=led] .case-stats div { border-color: var(--magenta); }
.case-stats b { display: block; font: 700 clamp(18px, 2vw, 24px)/1.15 var(--display); }
.case-stats span { color: var(--muted); font-size: 13px; line-height: 1.35; display: block; margin-top: 4px; }
.case-cover { grid-column: 1 / -1; border-radius: 16px; overflow: hidden; aspect-ratio: 21/9; }
.case-cover img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 760px) { .case { grid-template-columns: 1fr; } }

/* FAQ */
.faq { max-width: 860px; }
.faq details { border-bottom: 1px solid var(--truss); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 48px 22px 0; font: 600 18px/1.4 var(--body); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ''; position: absolute; right: 8px; top: 30px; width: 12px; height: 12px; border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan); transform: rotate(45deg); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(225deg); top: 34px; }
.faq details p { color: #c9c4f2; padding-bottom: 20px; max-width: 70ch; }

/* Контакты и форма */
.contact { display: grid; grid-template-columns: 1fr 1.25fr; gap: clamp(28px, 5vw, 64px); }
.contact-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 16px; }
.contact-list li { display: grid; grid-template-columns: 26px 1fr; gap: 12px; align-items: start; }
.contact-list svg { width: 22px; height: 22px; color: var(--cyan); margin-top: 2px; }
.contact-list a { color: var(--text); text-decoration: none; font-weight: 700; }
.contact-list small { display: block; color: var(--muted); }
.form { background: var(--deck); border: 1px solid var(--truss); border-radius: 24px; padding: clamp(22px, 3vw, 36px); display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
.form .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.field input, .field select, .field textarea { width: 100%; background: var(--stage); color: var(--text); border: 1.5px solid var(--truss); border-radius: 12px;
  padding: 12px 14px; font: 500 16px var(--body); }
.field textarea { min-height: 110px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(63,224,255,.18); }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--muted); }
.consent input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--magenta); flex: none; }
.hp { position: absolute; left: -5000px; }
.form-msg { grid-column: 1 / -1; margin: 0; font-weight: 600; }
.form-msg.ok { color: #7ff0b8; }
.form-msg.err { color: #ff8fb5; }
@media (max-width: 860px) { .contact { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .form { grid-template-columns: 1fr; } }

/* Страницы услуг и текстовые страницы */
.page-hero { padding: clamp(56px, 8vw, 96px) 0 clamp(32px, 5vw, 56px); border-bottom: 1px solid var(--truss);
  background: radial-gradient(60% 120% at 100% 0%, rgba(63,224,255,.12), transparent 60%); }
.page-hero[data-cat=led] { background: radial-gradient(60% 120% at 100% 0%, rgba(255,61,139,.16), transparent 60%); }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 18px; }
.crumbs a { color: var(--muted); }
.page-hero .price-tag { display: inline-block; margin-top: 8px; font-weight: 700; padding: 8px 16px; border-radius: 999px; box-shadow: inset 0 0 0 1.5px var(--truss); }
.feat { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 0; border-top: 1px solid var(--truss); border-left: 1px solid var(--truss); margin-bottom: 56px; }
.feat div { padding: 26px; border-right: 1px solid var(--truss); border-bottom: 1px solid var(--truss); }
.feat h3 { font-size: 17px; }
.feat p { color: #c9c4f2; margin: 0; font-size: 16px; }
.prose { max-width: 72ch; }
.prose h2 { font-size: clamp(22px, 2.6vw, 30px); margin-top: 1.6em; }
.prose h3 { margin-top: 1.4em; }
.prose li { margin-bottom: .4em; }
.prose strong { color: #fff; }
.prose img { border-radius: 14px; margin: 1em 0; }

.cta-band { margin-top: 64px; padding: clamp(28px, 4vw, 48px); border-radius: 28px; display: flex; gap: 24px; align-items: center; justify-content: space-between; flex-wrap: wrap;
  background: linear-gradient(100deg, rgba(255,61,139,.22), rgba(63,224,255,.16) 60%, rgba(255,180,60,.16)), var(--riser); border: 1px solid var(--truss); }
.cta-band h2 { margin: 0; font-size: clamp(22px, 2.6vw, 30px); max-width: 22ch; }

/* Подвал */
.foot { border-top: 1px solid var(--truss); padding: 48px 0 32px; color: var(--muted); font-size: 15px; }
.foot .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.foot h4 { color: var(--text); font: 600 15px var(--body); margin: 0 0 12px; }
.foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--text); }
.foot-bottom { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 24px; border-top: 1px solid rgba(58,49,128,.5); font-size: 14px; }
@media (max-width: 760px) { .foot .wrap { grid-template-columns: 1fr; } }

.notfound { min-height: 60vh; display: grid; place-items: center; text-align: center; }
.notfound b { font: 800 clamp(80px, 16vw, 180px)/1 var(--display); background: linear-gradient(90deg, var(--magenta), var(--amber), var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent; display: block; }
.foot .ver { color: var(--muted); opacity: .7; }