/* АЛМАЗ-ПРО — алмазная резка и бурение, СПб. СВЕТЛАЯ тема в жанре DVB Lab. */
:root{
  --bg:#ECEEF4; --bg2:#F4F5F9; --card:#ffffff; --card2:#fbfcfe;
  --ink:#16181d; --ink2:#3c4250; --muted:#6c7382; --muted2:#9aa1ad;
  --acc:#ff6a1a; --acc-rgb:255,106,26; --acc-d:#e9590b;
  --cy:#1499c0; --cy-rgb:20,153,192;
  --lila:160,140,255;
  --wa:#25d366;
  --line:rgba(22,24,29,.10); --line2:rgba(22,24,29,.14);
  --shadow:0 18px 44px -22px rgba(22,24,29,.30);
  --r:18px; --rs:13px; --max:1200px;
  --fd:'Outfit',system-ui,sans-serif; --fb:'Inter',system-ui,sans-serif; --fm:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;background:var(--bg)}
body{font-family:var(--fb);background:var(--bg);color:var(--ink);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--acc);color:#fff}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 clamp(18px,5vw,34px)}
section{position:relative}
h1,h2,h3{font-family:var(--fd);font-weight:700;line-height:1.07;letter-spacing:-.015em}
h2{font-size:clamp(27px,5vw,44px)}
h3{font-size:clamp(19px,3vw,23px)}
.mono{font-family:var(--fm)}
.acc{color:var(--acc)}
.cy{color:var(--cy)}
.muted{color:var(--muted)}
.center{text-align:center}

/* блобы-подложка (репёрпоз .grid-bg) */
.grid-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden;
  background:
   radial-gradient(40vw 40vw at 6% -4%, rgba(var(--acc-rgb),.20), transparent 60%),
   radial-gradient(44vw 44vw at 96% -8%, rgba(var(--cy-rgb),.18), transparent 62%),
   radial-gradient(34vw 34vw at 62% 8%, rgba(var(--lila),.16), transparent 64%);
  filter:blur(14px);
  -webkit-mask-image:linear-gradient(to bottom,#000 55%,transparent);mask-image:linear-gradient(to bottom,#000 55%,transparent);
  animation:drift 22s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(0,-2%,0) scale(1.05)}}

/* ===== HEADER ===== */
header{position:sticky;top:0;z-index:50;background:linear-gradient(to bottom,rgba(236,238,244,.86),rgba(236,238,244,.6));backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;gap:18px;height:70px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand b{font-family:var(--fd);font-weight:800;font-size:21px;letter-spacing:-.02em}
.brand .dot{color:var(--acc)}
.brand small{display:block;font-size:10px;letter-spacing:.14em;color:var(--muted2);text-transform:uppercase;margin-top:1px;font-weight:600}
.nav{display:flex;gap:20px;margin-left:8px;flex-wrap:wrap}
.nav a{font-size:14px;font-weight:500;color:var(--ink2);transition:.15s;white-space:nowrap}
.nav a:hover,.nav a.act{color:var(--acc)}
.hd-r{margin-left:auto;display:flex;align-items:center;gap:13px}
.hd-tel{font-family:var(--fd);font-size:19px;font-weight:700;white-space:nowrap;letter-spacing:-.01em}
.hd-tel small{display:block;font-family:var(--fb);font-size:10px;font-weight:500;color:var(--muted2);letter-spacing:.06em;text-transform:uppercase}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line2);border-radius:12px;background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:4px;cursor:pointer}
.burger span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

/* кнопки */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--fd);font-weight:600;font-size:15px;letter-spacing:-.01em;padding:13px 23px;border-radius:13px;border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn-acc{background:linear-gradient(135deg,var(--acc),var(--acc-d));color:#fff;box-shadow:0 10px 26px -8px rgba(var(--acc-rgb),.6)}
.btn-acc:hover{box-shadow:0 14px 32px -8px rgba(var(--acc-rgb),.8)}
.btn-gh{background:#fff;color:var(--ink);border-color:var(--line2)}
.btn-gh:hover{border-color:var(--acc);color:var(--acc)}
.btn-wa{background:var(--wa);color:#053b1a}
.btn-max{background:#fff;color:var(--muted2);border-color:var(--line2);cursor:default;position:relative}
.btn-max[data-stub]:hover{transform:none}
.btn-max .tip{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-family:var(--fb);font-weight:400;letter-spacing:0;font-size:11px;padding:5px 9px;border-radius:7px;white-space:nowrap;opacity:0;pointer-events:none;transition:.15s}
.btn-max:hover .tip{opacity:1}
.btn-sm{padding:10px 17px;font-size:13px;border-radius:11px}
.btn-lg{padding:16px 28px;font-size:16px}
.ico{width:18px;height:18px;flex-shrink:0}

/* ===== HERO ===== */
.hero{position:relative;padding:clamp(38px,6.5vw,78px) 0 clamp(36px,6vw,60px);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,56px);align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--ink2);background:#fff;border:1px solid var(--line2);padding:7px 14px;border-radius:100px;margin-bottom:20px;box-shadow:0 4px 14px rgba(22,24,29,.05)}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--acc);box-shadow:0 0 0 4px rgba(var(--acc-rgb),.2)}
.hero h1{font-size:clamp(33px,6vw,58px);font-weight:800;letter-spacing:-.025em}
.hero h1 em{font-style:normal;color:var(--acc);display:block}
.hero .lead{color:var(--ink2);font-size:clamp(15px,2.2vw,18px);margin:18px 0 0;max-width:31em}
.lic{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0 26px}
.lic span{font-family:var(--fm);font-size:12px;letter-spacing:.02em;color:var(--ink2);background:#fff;border:1px solid var(--line2);padding:7px 12px;border-radius:10px;box-shadow:0 3px 10px rgba(22,24,29,.04)}
.lic span b{color:var(--acc);font-weight:700}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-media{position:relative}
.hero-media img{width:100%;height:clamp(280px,42vw,450px);object-fit:cover;border-radius:var(--r);border:1px solid var(--line)}
.hero-media .frame{position:absolute;inset:0;border-radius:var(--r);box-shadow:var(--shadow),inset 0 0 0 1px rgba(255,255,255,.4);pointer-events:none}
.spec-chip{position:absolute;left:14px;bottom:14px;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);border:1px solid var(--line2);border-radius:14px;padding:12px 16px;display:flex;gap:18px;box-shadow:var(--shadow)}
.spec-chip .s b{font-family:var(--fd);font-weight:800;font-size:22px;color:var(--acc);display:block;line-height:1}
.spec-chip .s small{font-size:10px;color:var(--muted);letter-spacing:.05em;text-transform:uppercase;font-weight:600}

/* ===== TRUST BAR ===== */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.5)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.trust-grid .t{padding:22px clamp(16px,2.4vw,28px);border-left:1px solid var(--line);display:flex;gap:14px;align-items:flex-start}
.trust-grid .t:first-child{border-left:none}
.trust-grid .t .ic{width:30px;height:30px;color:var(--acc);flex-shrink:0}
.trust-grid .t b{font-family:var(--fd);font-weight:700;font-size:17px;display:block;letter-spacing:-.01em}
.trust-grid .t span{font-size:13px;color:var(--muted)}

/* ===== SECTION HEAD ===== */
.sec{padding:clamp(46px,7vw,82px) 0}
.sec-h{margin-bottom:clamp(26px,4vw,44px)}
.sec-h .tag{font-family:var(--fm);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--acc);display:block;margin-bottom:11px;font-weight:500}
.sec-h p{color:var(--muted);margin-top:12px;max-width:46em;font-size:15px}

/* ===== SERVICES GRID ===== */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.22s;display:flex;flex-direction:column;box-shadow:0 6px 18px -12px rgba(22,24,29,.25)}
.card:hover{border-color:rgba(var(--acc-rgb),.45);transform:translateY(-4px);box-shadow:var(--shadow)}
.card-img{position:relative;aspect-ratio:16/10;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .card-img img{transform:scale(1.06)}
.card .hot{position:absolute;top:12px;left:12px;z-index:2;font-family:var(--fm);font-size:11px;letter-spacing:.02em;color:#fff;background:rgba(var(--acc-rgb),.95);padding:4px 9px;border-radius:8px;box-shadow:0 4px 12px rgba(var(--acc-rgb),.4)}
.card-b{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.card-b h3{font-size:20px;margin-bottom:8px}
.card-b p{font-size:13.5px;color:var(--muted);flex:1}
.card-spec{font-family:var(--fm);font-size:12px;color:var(--cy);margin:12px 0 14px;padding-top:12px;border-top:1px solid var(--line)}
.card-more{font-family:var(--fd);font-weight:600;font-size:14px;letter-spacing:-.01em;color:var(--acc);display:inline-flex;align-items:center;gap:7px}
.card-more::after{content:"→";transition:.2s}
.card:hover .card-more::after{transform:translateX(4px)}

/* ===== PORTFOLIO ===== */
.works{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.works a{position:relative;aspect-ratio:4/3;overflow:hidden;border-radius:var(--rs);border:1px solid var(--line);display:block;box-shadow:0 6px 18px -12px rgba(22,24,29,.25)}
.works img{width:100%;height:100%;object-fit:cover;transition:.4s}
.works a:hover img{transform:scale(1.07)}
.works a::after{content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 2px rgba(var(--acc-rgb),0);transition:.2s;border-radius:var(--rs)}
.works a:hover::after{box-shadow:inset 0 0 0 2px rgba(var(--acc-rgb),.7)}

/* ===== STEPS ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px 20px;position:relative;box-shadow:0 6px 18px -14px rgba(22,24,29,.25)}
.step::before{counter-increment:s;content:"0" counter(s);font-family:var(--fd);font-weight:800;font-size:40px;color:rgba(var(--acc-rgb),.18);position:absolute;top:14px;right:16px}
.step b{font-family:var(--fd);font-weight:700;font-size:18px;display:block;margin-bottom:6px;position:relative;letter-spacing:-.01em}
.step span{font-size:13.5px;color:var(--muted)}

/* ===== SPEC TABLE ===== */
.specs{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:0 6px 18px -14px rgba(22,24,29,.25)}
.specs .row{display:grid;grid-template-columns:minmax(140px,.5fr) 1fr;border-top:1px solid var(--line)}
.specs .row:first-child{border-top:none}
.specs .k{padding:15px 20px;font-family:var(--fm);font-size:12.5px;letter-spacing:.03em;text-transform:uppercase;color:var(--muted);background:var(--card2)}
.specs .v{padding:15px 20px;font-size:14.5px;border-left:1px solid var(--line)}
.specs .v b{color:var(--cy);font-family:var(--fm)}

/* преимущества */
.feats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.feat{display:flex;gap:13px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--rs);padding:17px 18px;box-shadow:0 6px 18px -16px rgba(22,24,29,.25)}
.feat .ic{width:22px;height:22px;color:var(--acc);flex-shrink:0;margin-top:2px}
.feat b{font-family:var(--fd);font-weight:700;font-size:16px;display:block;letter-spacing:-.01em;margin-bottom:3px}
.feat span{font-size:13.5px;color:var(--muted)}

/* переключатель услуг */
.switch{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.switch a{background:var(--card);border:1px solid var(--line);border-radius:var(--rs);padding:15px 16px;transition:.18s;box-shadow:0 6px 18px -16px rgba(22,24,29,.25)}
.switch a:hover{border-color:var(--acc);transform:translateY(-2px)}
.switch a b{font-family:var(--fd);font-weight:700;font-size:15px;display:block;letter-spacing:-.01em}
.switch a span{font-size:12px;color:var(--muted)}

/* FAQ */
.faq details{border:1px solid var(--line);border-radius:var(--rs);background:var(--card);margin-bottom:10px;overflow:hidden}
.faq summary{padding:17px 20px;font-family:var(--fd);font-weight:600;font-size:17px;letter-spacing:-.01em;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:14px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:24px;color:var(--acc);transition:.2s;line-height:1}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 20px 18px;color:var(--muted);font-size:14.5px}

/* ===== CTA / FORM ===== */
.cta{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:clamp(28px,4vw,48px);position:relative;overflow:hidden;box-shadow:var(--shadow)}
.cta::after{content:"";position:absolute;top:-50%;right:-12%;width:52%;height:180%;background:radial-gradient(circle,rgba(var(--acc-rgb),.12),transparent 62%);pointer-events:none}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,48px);align-items:center;position:relative;z-index:1}
.cta h2{margin-bottom:10px}
.cta p{color:var(--ink2)}
.form{display:flex;flex-direction:column;gap:12px}
.form input{background:var(--bg2);border:1px solid var(--line2);border-radius:12px;padding:15px 16px;color:var(--ink);font-family:var(--fb);font-size:15px}
.form input::placeholder{color:var(--muted2)}
.form input:focus{outline:none;border-color:var(--acc);background:#fff}
.form .row2{display:flex;gap:12px}
.form .agree{font-size:12px;color:var(--muted);display:flex;gap:8px;align-items:flex-start}
.form .agree input{width:16px;height:16px;flex-shrink:0;margin-top:2px}
.or{display:flex;align-items:center;gap:12px;color:var(--muted2);font-size:13px;margin:4px 0}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line)}

/* ===== FOOTER (тёмный для опоры) ===== */
footer{background:#15171c;color:#c7ccd6;padding:clamp(40px,5vw,58px) 0 28px;margin-top:10px}
footer .brand b{color:#fff}
footer .brand small{color:#7e8696}
.ft-grid{display:grid;grid-template-columns:1.4fr 1fr 1.3fr;gap:clamp(24px,4vw,48px)}
.ft-grid h4{font-family:var(--fd);font-weight:600;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#7e8696;margin-bottom:16px}
.ft-links a{display:block;color:#aab0bd;font-size:14px;padding:5px 0;transition:.15s}
.ft-links a:hover{color:var(--acc)}
.ft-req{font-size:12.5px;color:#7e8696;line-height:1.8}
.ft-req b{color:#aab0bd}
.ft-contacts a{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:15px;color:#dfe3ea}
.ft-contacts .ic{width:18px;height:18px;color:var(--acc)}
.ft-bot{border-top:1px solid rgba(255,255,255,.1);margin-top:30px;padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#6b7280}

/* ===== FAB ===== */
.fab{position:fixed;right:16px;bottom:16px;z-index:60;display:none;flex-direction:column;gap:12px}
.fab a{width:54px;height:54px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 28px -8px rgba(22,24,29,.4);transition:.18s}
.fab a:hover{transform:scale(1.08)}
.fab .f-wa{background:var(--wa)}
.fab .f-tel{background:linear-gradient(135deg,var(--acc),var(--acc-d));position:relative}
.fab .f-tel::before{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid var(--acc);animation:pulseRing 2s infinite}
.fab .ico{width:24px;height:24px;color:#fff}
@keyframes pulseRing{0%{transform:scale(1);opacity:.8}100%{transform:scale(1.7);opacity:0}}

/* breadcrumbs */
.crumbs{padding:16px 0 0;font-size:13px;color:var(--muted2)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--acc)}

/* mobile menu */
.mmenu{display:none;position:fixed;inset:70px 12px auto 12px;z-index:49;background:#fff;border:1px solid var(--line2);border-radius:20px;padding:14px;overflow-y:auto;max-height:80vh;box-shadow:0 24px 60px rgba(22,24,29,.18)}
.mmenu.open{display:block}
.mmenu a{display:block;padding:13px 12px;border-radius:12px;font-family:var(--fd);font-weight:600;font-size:16px;letter-spacing:-.01em;color:var(--ink)}
.mmenu a:hover{background:var(--bg)}
.mmenu .mm-cta{display:flex;gap:10px;margin-top:14px;padding:0 4px}
.mmenu .mm-cta .btn{flex:1}

/* ===== RESPONSIVE ===== */
@media(max-width:1000px){
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .trust-grid .t:nth-child(3){border-left:none}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .works{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .switch{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:880px){
  .svc-2col{grid-template-columns:1fr!important}
  .nav{display:none}
  .burger{display:flex}
  .hero-grid{grid-template-columns:1fr}
  .hero-media{order:-1}
  .hero-media img{height:clamp(220px,54vw,320px)}
  .cta-grid{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr 1fr}
  .fab{display:flex}
  .hd-tel small{display:none}
}
@media(max-width:600px){
  .hd-tel{display:none}
  .hd .btn-max,.hd .btn-wa{display:none}
  .svc-grid{grid-template-columns:1fr}
  .works{grid-template-columns:repeat(2,1fr)}
  .feats{grid-template-columns:1fr}
  .specs .row{grid-template-columns:1fr}
  .specs .v{border-left:none;border-top:1px solid var(--line);padding-top:8px}
  .specs .k{padding-bottom:4px}
  .ft-grid{grid-template-columns:1fr}
  .form .row2{flex-direction:column}
  .trust-grid{grid-template-columns:1fr}
  .trust-grid .t{border-left:none;border-top:1px solid var(--line)}
  .trust-grid .t:first-child{border-top:none}
}
@media(max-width:360px){
  .wrap{padding:0 15px}
  .lic span{font-size:11px}
  .btn{font-size:14px;padding:13px 18px}
}