/* =====================================================================
   САНТЕХНИК · Усть-Каменогорск — «стальной» дизайн
   Дизайн-токены (меняйте здесь, чтобы генерировать варианты)
   ===================================================================== */
:root{
  --bg:#0A0E14;            /* основной тёмный фон */
  --surface:#12171F;       /* карточки / панели */
  --surface-2:#0E131A;     /* полосы-секции */
  --text:#FFFFFF;          /* основной текст */
  --muted:#95A0B0;         /* приглушённый текст */
  --accent:#FF6B00;        /* оранжевый акцент */
  --accent-2:#5B7285;      /* стальной серо-синий (из логотипа) */
  --line:rgba(255,255,255,.10);
  --maxw:1200px;
  --pad:clamp(20px,5vw,60px);
  --display:"Archivo",system-ui,sans-serif;   /* тяжёлый гротеск для заголовков */
  --body:"Inter",system-ui,-apple-system,sans-serif;
  --radius:4px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--body);line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* ===== Заголовки ===== */
.sec-title{
  font-family:var(--display);font-weight:900;text-transform:uppercase;
  font-size:clamp(32px,5.5vw,58px);line-height:1;letter-spacing:.01em;margin:0;
}
.sec-head{max-width:760px;margin-bottom:clamp(36px,5vw,60px)}
.sec-sub{color:var(--muted);font-size:clamp(15px,1.8vw,18px);margin:18px 0 0}

/* ===== Шапка ===== */
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(8,11,16,.82);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header__inner{display:flex;align-items:center;gap:26px;height:74px}
.logo img{height:40px;width:auto}
.nav{display:flex;gap:26px;margin-left:auto;font-size:14px;font-weight:500;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.nav a{position:relative;padding:4px 0;transition:color .2s}
.nav a:hover{color:var(--text)}
.nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent);transition:width .25s}
.nav a:hover::after{width:100%}
.header__phone{font-family:var(--display);font-weight:800;font-size:16px;white-space:nowrap}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto}
.burger span{width:24px;height:2px;background:var(--text)}

/* ===== Геро ===== */
.hero{position:relative;min-height:min(92vh,820px);display:flex;align-items:center;overflow:hidden}
.hero__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center}
.hero__overlay{position:absolute;inset:0;background:
  linear-gradient(90deg,rgba(10,14,20,.92) 0%,rgba(10,14,20,.62) 45%,rgba(10,14,20,.30) 100%),
  linear-gradient(0deg,rgba(10,14,20,.95) 0%,rgba(10,14,20,0) 55%);}
.hero__inner{position:relative;padding-top:96px;padding-bottom:clamp(40px,6vw,72px)}
.kicker{display:flex;align-items:center;gap:12px;text-transform:uppercase;letter-spacing:.22em;font-size:13px;font-weight:600;color:var(--accent);margin:0 0 22px}
.kicker__bar{width:44px;height:2px;background:var(--accent)}
.hero__title{
  font-family:var(--display);font-weight:900;text-transform:uppercase;
  font-size:clamp(54px,11vw,124px);line-height:.86;letter-spacing:-.01em;margin:0;
}
.hero__sub{max-width:540px;color:#D5DAE2;font-size:clamp(16px,2vw,20px);margin:26px 0 34px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero__phone{display:block;margin-top:26px;font-family:var(--display);font-weight:800;font-size:clamp(22px,3vw,32px)}

/* ===== Кнопки ===== */
.btn{
  display:inline-block;padding:15px 32px;border-radius:var(--radius);
  font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.04em;
  font-size:15px;cursor:pointer;transition:.2s;border:2px solid transparent;
}
.btn--accent{background:var(--accent);color:#0A0E14}
.btn--accent:hover{background:#ff8226}
.btn--outline{background:transparent;color:var(--text);border-color:rgba(255,255,255,.35)}
.btn--outline:hover{border-color:var(--accent);color:var(--accent)}

/* ===== Секции ===== */
.section{padding:clamp(64px,9vw,116px) 0}
.section--band{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ===== Услуги (карточки) ===== */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px 30px;position:relative;overflow:hidden;transition:.25s;
}
.card::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .3s}
.card:hover{border-color:rgba(255,107,0,.4);transform:translateY(-4px)}
.card:hover::before{transform:scaleX(1)}
.card__num{font-family:var(--display);font-weight:900;font-size:28px;color:var(--accent)}
.card__img{width:64px;height:64px;object-fit:cover;border-radius:50%;margin:16px 0 18px;border:2px solid rgba(255,255,255,.12)}
.card__title{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:19px;line-height:1.1;margin:0 0 16px}
.card__list{list-style:none;margin:0;padding:0}
.card__list li{position:relative;padding:9px 0 9px 20px;font-size:14.5px;color:var(--muted);border-top:1px solid var(--line)}
.card__list li:first-child{border-top:0}
.card__list li::before{content:"";position:absolute;left:0;top:16px;width:7px;height:7px;background:var(--accent);border-radius:50%}

/* ===== Почему я ===== */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.why__item{background:var(--surface-2);padding:clamp(26px,3vw,38px)}
.why__no{font-family:var(--display);font-weight:900;font-size:15px;color:var(--accent);letter-spacing:.08em}
.why__item h3{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:20px;margin:12px 0 12px}
.why__item p{margin:0;color:var(--muted);font-size:15px}

/* ===== Работы ===== */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.shot{margin:0;overflow:hidden;border-radius:var(--radius);border:1px solid var(--line);aspect-ratio:1/1}
.shot img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.shot:hover img{transform:scale(1.06)}

/* ===== Отзывы ===== */
.reviews{display:grid;grid-template-columns:1fr 1fr;gap:clamp(26px,5vw,64px)}
.quote{margin:0;border-left:3px solid var(--accent);padding:6px 0 6px 28px}
.quote blockquote{margin:0 0 20px;font-size:clamp(17px,2.1vw,22px);line-height:1.5;color:#E7EAF0}
.quote figcaption{font-family:var(--display);font-weight:800;text-transform:uppercase;letter-spacing:.06em;font-size:14px;color:var(--muted)}

/* ===== Контакты ===== */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:start}
.contact__row{display:flex;flex-direction:column;gap:6px;padding:18px 0;border-bottom:1px solid var(--line)}
.contact__row:first-child{padding-top:0}
.contact__label{text-transform:uppercase;letter-spacing:.16em;font-size:12px;color:var(--accent)}
.contact__value{font-family:var(--display);font-weight:700;font-size:clamp(19px,2.4vw,25px);line-height:1.3}
a.contact__value:hover{color:var(--accent)}

/* ===== Форма ===== */
.form{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,3.5vw,38px)}
.form__title{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:22px;margin:0 0 22px}
.field{display:block;margin-bottom:18px}
.field span{display:block;text-transform:uppercase;letter-spacing:.12em;font-size:12px;color:var(--muted);margin-bottom:8px}
.field input,.field textarea{
  width:100%;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:12px 14px;font-family:var(--body);font-size:15px;color:var(--text);resize:vertical;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.form__submit{width:100%;margin-top:4px}
.form__note{margin:14px 0 0;font-size:14px;color:var(--accent)}

/* ===== Футер ===== */
.footer{background:#06090D;border-top:1px solid var(--line);padding:44px 0}
.footer__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer__logo{height:38px}
.footer__cols{display:flex;flex-direction:column;gap:6px}
.footer__phone{font-family:var(--display);font-weight:800;font-size:18px}
.footer__services{color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.05em}
.footer__copy{color:#5c6673;font-size:13px}

/* ===== Плавающая кнопка ===== */
.fab{position:fixed;right:22px;bottom:22px;z-index:60;width:56px;height:56px;border-radius:50%;
  background:var(--accent);color:#0A0E14;display:none;align-items:center;justify-content:center;
  font-size:22px;box-shadow:0 10px 26px rgba(255,107,0,.4)}

/* ===== Адаптив ===== */
@media (max-width:960px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .why{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .nav{display:none;position:absolute;top:74px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:6px 0}
  .nav.open{display:flex}
  .nav a{padding:14px var(--pad)}
  .header__phone{display:none}
  .burger{display:flex}
  .cards,.why,.gallery,.reviews,.contact{grid-template-columns:1fr}
  .fab{display:flex}
}