*{box-sizing:border-box}
:root{
  --bg:#17191b;
  --bg-2:#1d2023;
  --paper:#222629;
  --paper-2:#272c30;
  --ink:#eee9df;
  --muted:#a9aaa6;
  --accent:#ff8a45;
  --accent-2:#ffc46b;
  --cyan:#61d8d0;
  --line:#4a3327;
  --line-soft:#34393d;
  --glow:rgba(255,138,69,.28);
  --glow-cyan:rgba(97,216,208,.16);
}

html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background:
    radial-gradient(circle at 15% 0%,rgba(255,138,69,.08),transparent 30%),
    radial-gradient(circle at 85% 20%,rgba(97,216,208,.045),transparent 28%),
    linear-gradient(145deg,var(--bg),var(--bg-2));
  color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.5;
}
a{text-decoration:none;color:inherit}

header{
  position:sticky;
  top:0;
  z-index:10;
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:14px clamp(15px,5vw,70px);
  background:rgba(23,25,27,.88);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,138,69,.20);
  box-shadow:0 4px 22px rgba(0,0,0,.25);
}
.brand{
  font-weight:850;
  font-size:20px;
  letter-spacing:.01em;
  text-shadow:0 0 18px rgba(255,138,69,.18);
}
.search{
  width:160px;
  height:42px;
  border:1px solid #66412e;
  border-radius:18px;
  padding:10px 15px;
  color:var(--muted);
  background:#202427;
  text-align:center;
  box-shadow:inset 0 0 12px rgba(0,0,0,.22),0 0 12px rgba(255,138,69,.04);
}

main{max-width:1180px;margin:auto;padding:48px 22px 90px}
.eyebrow{
  font-size:11px;
  letter-spacing:.15em;
  font-weight:850;
  color:#e59a62;
}
.intro{max-width:780px;margin-bottom:30px}
.intro h1{
  font-size:clamp(48px,7vw,78px);
  line-height:.95;
  letter-spacing:-.055em;
  margin:9px 0 17px;
  text-shadow:0 0 28px rgba(255,138,69,.10);
}
.intro p,.head p{font-size:19px;color:var(--muted)}

.grid,.branches{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}

.card,.branch{
  position:relative;
  display:block;
  overflow:hidden;
  background:
    linear-gradient(145deg,rgba(255,255,255,.025),transparent 45%),
    var(--paper);
  border:1px solid #5c402f;
  border-radius:27px;
  padding:25px;
  box-shadow:
    0 9px 28px rgba(0,0,0,.28),
    inset 0 0 0 1px rgba(255,180,100,.025),
    0 0 10px rgba(255,138,69,.025);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card{min-height:180px}

.card:before,.branch:before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  pointer-events:none;
  background:linear-gradient(135deg,rgba(255,138,69,.08),transparent 38%,rgba(97,216,208,.035));
}
.card:after,.branch:after{
  content:"";
  position:absolute;
  width:145px;
  height:145px;
  right:-60px;
  bottom:-72px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,69,.18),rgba(255,138,69,0) 70%);
  transition:.35s;
  pointer-events:none;
}
.card:hover,.branch:hover{
  transform:translateY(-7px);
  border-color:#e17d45;
  box-shadow:
    0 18px 42px rgba(0,0,0,.38),
    0 0 13px rgba(255,138,69,.22),
    0 0 30px rgba(255,138,69,.08),
    inset 0 0 16px rgba(255,138,69,.025);
}
.card:hover:after,.branch:hover:after{transform:scale(1.45)}

.card h2,.branch h2{
  position:relative;
  z-index:1;
  font-size:21px;
  margin:15px 0 6px;
}
.card p,.branch p{
  position:relative;
  z-index:1;
  color:var(--muted);
  margin:0;
}

.head{max-width:820px;margin-bottom:28px}
.back{
  display:inline-block;
  margin-bottom:24px;
  color:#e29a65;
  font-weight:750;
}
.head h1{
  font-size:clamp(40px,6vw,64px);
  line-height:1;
  letter-spacing:-.045em;
  margin:8px 0 14px;
  text-shadow:0 0 24px rgba(255,138,69,.09);
}
.branch{min-height:150px}

.arrow{
  position:absolute;
  right:18px;
  top:16px;
  z-index:2;
  color:var(--accent);
  font-size:22px;
  text-shadow:0 0 12px var(--glow);
}

.note{
  margin-top:28px;
  padding:20px 22px;
  border:1px dashed #8a5a3e;
  border-radius:20px;
  background:#211e1b;
  color:#b8b7b0;
  box-shadow:0 0 18px rgba(255,138,69,.05);
}

nav{display:none}

@media(max-width:820px){
  main{padding:35px 15px 85px}
  .grid,.branches{grid-template-columns:1fr 1fr;gap:13px}
  .card,.branch{min-height:150px;padding:19px;border-radius:21px}
  .card h2,.branch h2{font-size:18px}
  .card p,.branch p{font-size:13px}
  nav{
    display:block;
    position:fixed;
    bottom:0;
    left:0;
    right:0;
    z-index:20;
    text-align:center;
    padding:11px;
    background:rgba(23,25,27,.94);
    border-top:1px solid rgba(255,138,69,.22);
    box-shadow:0 -4px 20px rgba(0,0,0,.28);
    font-size:13px;
  }
}

@media(max-width:520px){
  .grid,.branches{grid-template-columns:1fr}
  .search{width:125px;font-size:13px}
  .intro h1{font-size:54px}
}


/* === v16.4 — живые карточки === */
.card,.branch{
  --card-accent:var(--accent);
  --card-glow:rgba(255,138,69,.22);
  isolation:isolate;
}
.grid .card:nth-child(2){--card-accent:#69d8d0;--card-glow:rgba(105,216,208,.20)}
.grid .card:nth-child(3){--card-accent:#ffd166;--card-glow:rgba(255,209,102,.18)}
.grid .card:nth-child(4){--card-accent:#8fb8ff;--card-glow:rgba(143,184,255,.18)}
.grid .card:nth-child(5){--card-accent:#ff687d;--card-glow:rgba(255,104,125,.18)}
.grid .card:nth-child(6){--card-accent:#bd8cff;--card-glow:rgba(189,140,255,.18)}

.card{
  animation:cardIn .55s both;
}
.grid .card:nth-child(2){animation-delay:.06s}
.grid .card:nth-child(3){animation-delay:.12s}
.grid .card:nth-child(4){animation-delay:.18s}
.grid .card:nth-child(5){animation-delay:.24s}
.grid .card:nth-child(6){animation-delay:.30s}

.card:after,.branch:after{
  background:radial-gradient(circle,var(--card-glow),transparent 70%);
}

.card:hover,.branch:hover{
  border-color:var(--card-accent);
  box-shadow:
    0 18px 42px rgba(0,0,0,.38),
    0 0 13px var(--card-glow),
    0 0 30px color-mix(in srgb,var(--card-accent) 18%,transparent),
    inset 0 0 16px rgba(255,255,255,.025);
}

.card h2,.branch h2{
  transition:transform .25s ease,text-shadow .25s ease;
}
.card:hover h2,.branch:hover h2{
  transform:translateX(2px);
  text-shadow:0 0 16px var(--card-glow);
}

.card:active,.branch:active{
  transform:translateY(-2px) scale(.985);
  transition-duration:.08s;
  box-shadow:
    0 7px 20px rgba(0,0,0,.35),
    0 0 22px var(--card-glow);
}

.card .arrow,.branch .arrow{
  transition:transform .25s ease,opacity .25s ease;
}
.card:hover .arrow,.branch:hover .arrow{
  transform:translateX(5px);
  opacity:1;
}

@keyframes cardIn{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}

@media (prefers-reduced-motion:reduce){
  .card,.branch{animation:none!important;transition:none!important}
}

.ripple{
  position:absolute;
  z-index:5;
  border-radius:50%;
  pointer-events:none;
  background:radial-gradient(circle,rgba(255,255,255,.20) 0%,rgba(255,138,69,.10) 35%,transparent 70%);
  transform:scale(0);
  animation:ripple .5s ease-out forwards;
}
@keyframes ripple{
  to{transform:scale(1);opacity:0}
}

/* === MMA topic page === */
.topic-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.topic{position:relative;display:flex;align-items:flex-start;gap:17px;padding:20px 54px 20px 18px;border:1px solid #4e3b30;border-radius:20px;background:linear-gradient(145deg,rgba(255,255,255,.025),transparent 45%),var(--paper);transition:.25s;overflow:hidden}
.topic:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:0 10px 28px rgba(0,0,0,.28),0 0 18px rgba(255,138,69,.10)}
.topic-num{flex:0 0 38px;height:38px;display:grid;place-items:center;border-radius:12px;background:#2b2622;color:var(--accent-2);font-size:12px;font-weight:850;border:1px solid #60432f}
.topic h2{margin:1px 0 5px;font-size:18px}.topic p{margin:0;color:var(--muted);font-size:14px}.topic .arrow{right:17px;top:50%;transform:translateY(-50%)}
@media(max-width:820px){.topic-list{grid-template-columns:1fr}.topic{padding:17px 48px 17px 15px}.topic h2{font-size:17px}.topic p{font-size:13px}}

/* MMA detailed intro */
.mma-intro{margin:0 0 24px;padding:24px;border:1px solid rgba(255,255,255,.09);border-radius:20px;background:linear-gradient(145deg,rgba(255,255,255,.055),rgba(255,255,255,.018));box-shadow:0 12px 35px rgba(0,0,0,.16)}
.section-label{font-size:.78rem;letter-spacing:.12em;font-weight:800;opacity:.65;margin-bottom:10px}
.mma-intro h2{margin:0 0 16px;font-size:clamp(1.45rem,3vw,2.15rem)}
.mma-intro h3{margin:26px 0 12px;font-size:1.08rem}
.mma-intro p{line-height:1.7;margin:0 0 14px}
.mma-steps{margin:0;padding-left:24px;line-height:1.7}
.mma-steps li{padding:7px 0 7px 4px}
.mma-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 22px;margin:0 0 16px;padding-left:22px;line-height:1.6}
.tip{margin-top:20px;padding:16px 18px;border-left:3px solid currentColor;border-radius:12px;background:rgba(255,255,255,.045);line-height:1.65}
@media(max-width:640px){.mma-intro{padding:18px;border-radius:16px}.mma-points{grid-template-columns:1fr;gap:4px}.mma-steps{padding-left:21px}}

/* === MMA v16.7: collapsible filled sections === */
.mma-top-note{margin:0 0 20px;padding:14px 17px;border:1px dashed #735039;border-radius:15px;background:rgba(255,138,69,.055);color:var(--muted);line-height:1.55;font-size:14px}.mma-top-note b{color:var(--accent)}
.mma-topics{display:grid;gap:12px}.mma-topic{border:1px solid #4e3b30;border-radius:18px;background:linear-gradient(145deg,rgba(255,255,255,.035),transparent 45%),var(--paper);overflow:hidden;transition:border-color .22s,box-shadow .22s}.mma-topic:hover{border-color:#76513b;box-shadow:0 8px 24px rgba(0,0,0,.22)}.mma-topic[open]{border-color:var(--accent);box-shadow:0 12px 30px rgba(0,0,0,.25),0 0 16px rgba(255,138,69,.08)}
.mma-topic summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:15px;padding:17px 18px;min-height:72px}.mma-topic summary::-webkit-details-marker{display:none}.topic-main{min-width:0;flex:1;display:flex;flex-direction:column;gap:5px}.topic-main strong{font-size:18px}.topic-main small{font-size:13px;color:var(--muted);line-height:1.45}.topic-toggle{flex:0 0 auto;color:var(--accent);font-size:11px;font-weight:850;letter-spacing:.04em}.topic-toggle .opened{display:none}.mma-topic[open] .topic-toggle .closed{display:none}.mma-topic[open] .topic-toggle .opened{display:inline}.mma-topic[open] summary{background:rgba(255,138,69,.035)}.mma-topic .topic-num{flex:0 0 42px;width:42px;height:42px}.topic-content{padding:0 22px 23px 75px;color:#d0cec7;line-height:1.7}.topic-content p{margin:0 0 14px}.topic-content h3{margin:20px 0 10px;color:#f0eee8;font-size:16px}.topic-content ul,.topic-content ol{margin:8px 0 16px;padding-left:22px}.topic-content li{margin:5px 0}.mma-table{width:100%;border-collapse:collapse;margin:14px 0 10px;font-size:14px}.mma-table th,.mma-table td{border:1px solid #4d3b30;padding:10px;text-align:left;vertical-align:top}.mma-table th{background:#2a2521;color:#f1ede5}.mma-table td{background:rgba(255,255,255,.018)}.muted-small{font-size:12px;color:var(--muted)}.mma-bottom{margin-top:28px}.mma-bottom .back{margin-bottom:0}
@media(max-width:640px){.mma-top-note{font-size:13px}.mma-topic summary{padding:14px 13px;gap:10px}.mma-topic .topic-num{flex-basis:36px;width:36px;height:36px}.topic-main strong{font-size:16px}.topic-main small{font-size:12px}.topic-toggle{font-size:10px}.topic-content{padding:0 15px 19px 59px;font-size:14px}.mma-table{font-size:12px;display:block;overflow-x:auto;white-space:nowrap}.mma-table th,.mma-table td{padding:8px}.mma-topic summary{align-items:flex-start}}


/* === Электроды: v16.8 foundation === */
.electrode-panel,.catalog-section{margin-top:34px}
.panel-heading{max-width:820px;margin-bottom:18px}
.panel-heading h2{font-size:clamp(28px,4vw,42px);margin:7px 0 8px}
.panel-heading p{color:var(--muted);margin:0}
.picker-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;padding:18px;border:1px solid var(--line-soft);border-radius:22px;background:rgba(255,255,255,.018)}
.picker-grid label{display:grid;gap:7px;color:var(--muted);font-size:13px;font-weight:700}
.picker-grid select{width:100%;padding:12px 13px;border:1px solid #5c402f;border-radius:13px;background:#202427;color:var(--ink);font:inherit}
.picker-result{margin-top:14px}
.match-card{display:grid;grid-template-columns:1.3fr .8fr auto;gap:18px;align-items:center;padding:20px;border:1px solid #725039;border-radius:22px;background:linear-gradient(145deg,rgba(255,138,69,.08),rgba(97,216,208,.025)),var(--paper)}
.match-label{font-size:10px;letter-spacing:.14em;color:var(--cyan);font-weight:900}
.match-card h3{margin:5px 0 3px;font-size:28px}
.match-card p{margin:0;color:var(--muted);font-size:14px}
.match-current{display:grid;gap:2px;padding:12px 15px;border-radius:15px;background:#1c2022;border:1px solid var(--line-soft)}
.match-current span,.match-current small{color:var(--muted);font-size:11px}
.match-current strong{font-size:23px;color:var(--accent-2)}
.match-link{font-weight:800;color:var(--accent-2);white-space:nowrap}
.empty-result{padding:18px;border:1px dashed #8a5a3e;border-radius:18px;color:var(--muted)}
.electrode-card{padding:24px;border:1px solid #684733;border-radius:28px;background:linear-gradient(145deg,rgba(255,255,255,.025),transparent 42%),var(--paper);box-shadow:0 12px 34px rgba(0,0,0,.25)}
.electrode-card-top{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}
.tag{display:inline-block;padding:5px 9px;border-radius:999px;margin-right:6px;background:#2d2722;color:var(--accent-2);border:1px solid #6b4730;font-size:11px;font-weight:850}
.electrode-card h3{font-size:clamp(34px,5vw,52px);line-height:1;margin:12px 0 9px}
.lead{max-width:760px;color:var(--muted);font-size:17px;margin:0}
.rating-box{min-width:155px;padding:13px 15px;border-radius:16px;background:#1c2022;border:1px solid var(--line-soft);display:grid;gap:2px}
.rating-box strong{color:var(--cyan)}
.rating-box span{font-size:11px;color:var(--muted)}
.facts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:22px}
.facts-grid>div{padding:14px;border:1px solid var(--line-soft);border-radius:15px;background:rgba(255,255,255,.012)}
.facts-grid b{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}
.facts-grid span{font-size:14px}
.electrode-block{margin-top:18px;padding:18px;border:1px solid var(--line-soft);border-radius:18px;background:rgba(255,255,255,.012)}
.electrode-block h4{margin:0 0 10px;font-size:18px}
.electrode-block p,.electrode-block li{color:var(--muted)}
.electrode-block ul{margin:0;padding-left:20px}
.current-table-wrap{overflow-x:auto}
.current-table{width:100%;border-collapse:collapse;min-width:520px}
.current-table th,.current-table td{padding:10px 12px;text-align:center;border-bottom:1px solid var(--line-soft)}
.current-table th{color:var(--accent-2);font-size:12px}
.current-table td{font-size:14px}
.current-table td:first-child{font-weight:850;color:var(--ink)}
.small-note{font-size:12px;margin-bottom:0}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.warning-block{border-color:#795039}
@media(max-width:820px){
  .picker-grid{grid-template-columns:1fr 1fr}
  .match-card{grid-template-columns:1fr}
  .match-link{justify-self:start}
  .facts-grid{grid-template-columns:1fr 1fr}
  .electrode-card-top{flex-direction:column}
  .rating-box{min-width:0}
  .two-col{grid-template-columns:1fr}
}
@media(max-width:520px){
  .picker-grid,.facts-grid{grid-template-columns:1fr}
  .electrode-card{padding:17px}
  .electrode-card h3{font-size:38px}
}

/* v16.9 — база электродов и многорезультатный подбор */
.match-list{display:grid;gap:12px}
.picker-summary{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:14px 0;padding:12px 14px;border:1px solid rgba(255,255,255,.1);border-radius:14px}
.picker-summary span{opacity:.75;font-size:.9rem}
.match-card{display:grid;grid-template-columns:auto 1fr auto auto;gap:14px;align-items:center}
.match-rank{font-weight:800;font-size:1.2rem;opacity:.6}
.match-main small{display:block;opacity:.75;line-height:1.45;margin-top:6px}
@media (max-width:800px){.match-card{grid-template-columns:auto 1fr}.match-current,.match-link{grid-column:2}.picker-summary{display:block}.picker-summary span{display:block;margin-top:5px}}

/* v16.10 — отдельная страница подборщика: один результат + компактные альтернативы */
.picker-only{margin-top:22px}
.picker-page-result{margin-top:20px}
.recommend-card{padding:24px;border:1px solid #765039;border-radius:28px;background:linear-gradient(145deg,rgba(255,138,69,.09),rgba(97,216,208,.025)),var(--paper);box-shadow:0 14px 38px rgba(0,0,0,.25)}
.recommend-badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#2d2722;color:var(--accent-2);border:1px solid #6b4730;font-size:10px;font-weight:900;letter-spacing:.12em}
.recommend-head{display:flex;justify-content:space-between;gap:22px;align-items:flex-start;margin-top:14px}
.recommend-head h2{font-size:clamp(34px,5vw,52px);line-height:1;margin:10px 0 8px}
.recommend-head p{max-width:760px;color:var(--muted);margin:0}
.recommend-current{min-width:170px;padding:14px 16px;border-radius:17px;background:#1c2022;border:1px solid var(--line-soft);display:grid;gap:3px}
.recommend-current span,.recommend-current small{font-size:11px;color:var(--muted)}
.recommend-current strong{font-size:25px;color:var(--accent-2)}
.recommend-facts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}
.recommend-facts>div{padding:13px;border:1px solid var(--line-soft);border-radius:15px}
.recommend-facts b{display:block;font-size:11px;color:var(--muted);margin-bottom:5px}
.recommend-facts span{font-size:14px}
.result-details,.alternatives{margin-top:14px;border:1px solid var(--line-soft);border-radius:17px;background:rgba(255,255,255,.012)}
.result-details summary,.alternatives summary{cursor:pointer;padding:15px 17px;font-weight:850}
.result-details .electrode-block{margin:0;border:0;border-top:1px solid var(--line-soft);border-radius:0}
.alternative-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:0 14px 14px}
.alternative-card{padding:15px;border:1px solid var(--line-soft);border-radius:16px;background:rgba(255,255,255,.018)}
.alternative-card h3{margin:8px 0 5px;font-size:22px}
.alternative-card p{color:var(--muted);font-size:13px;line-height:1.45}
.alternative-card>strong{display:block;color:var(--accent-2);margin:10px 0}
@media(max-width:760px){
  .recommend-head{flex-direction:column}
  .recommend-current{min-width:0;width:100%}
  .alternative-grid{grid-template-columns:1fr}
  .recommend-card{padding:18px}
}

/* v16.11 — связка «Металлы → как и чем варить → подборщик» */
.metal-guides{display:grid;gap:14px;margin-top:28px}
.metal-guide{display:grid;grid-template-columns:1.25fr .95fr;gap:18px;align-items:stretch;padding:21px;border:1px solid #4e3b30;border-radius:22px;background:linear-gradient(145deg,rgba(255,255,255,.025),transparent 45%),var(--paper)}
.metal-guide h2{margin:4px 0 7px;font-size:25px}.metal-guide p{margin:0;color:var(--muted);line-height:1.55}
.metal-guide.compact{grid-template-columns:1fr .8fr}
.process-box{padding:15px;border:1px solid var(--line-soft);border-radius:17px;background:rgba(255,255,255,.018)}
.process-box>strong{display:block;margin-bottom:10px}.process-links{display:flex;flex-wrap:wrap;gap:8px}.process-links a,.process-links span{display:inline-flex;align-items:center;padding:9px 11px;border-radius:12px;border:1px solid #5b402f;background:#24201d;color:var(--ink);font-size:13px;text-decoration:none}.process-links a:hover{border-color:var(--accent);color:var(--accent-2)}.process-links span{color:var(--muted);opacity:.78}

/* v16.11 — каталог: сначала названия, подробности внутри раскрываемых блоков */
#catalogList{display:grid;gap:10px}.catalog-item{border:1px solid #4e3b30;border-radius:18px;background:linear-gradient(145deg,rgba(255,255,255,.025),transparent 45%),var(--paper);overflow:hidden}.catalog-item[open]{border-color:#76513b;box-shadow:0 10px 28px rgba(0,0,0,.22)}
.catalog-item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:15px;padding:16px 18px}.catalog-item summary::-webkit-details-marker{display:none}.catalog-name{display:flex;flex-direction:column;gap:5px;min-width:0}.catalog-name strong{font-size:19px}.catalog-name small{color:var(--muted);font-size:12px}.catalog-toggle{flex:0 0 auto;color:var(--accent);font-size:11px;font-weight:850;letter-spacing:.05em}.catalog-toggle .opened{display:none}.catalog-item[open] .catalog-toggle .closed{display:none}.catalog-item[open] .catalog-toggle .opened{display:inline}.catalog-content{padding:0 18px 20px;border-top:1px solid var(--line-soft)}.catalog-content .electrode-card-top{padding-top:18px}.catalog-actions{display:flex;flex-wrap:wrap;gap:9px;margin:17px 0 2px}.action-link{display:inline-flex;align-items:center;padding:10px 13px;border:1px solid #5d422f;border-radius:12px;background:#24201d;color:var(--ink);text-decoration:none;font-size:13px;font-weight:750}.action-link:hover{border-color:var(--accent);color:var(--accent-2)}.action-link.primary{background:rgba(255,138,69,.08);border-color:#765039}
@media(max-width:820px){.metal-guide,.metal-guide.compact{grid-template-columns:1fr}.catalog-content{padding:0 14px 17px}.catalog-item summary{padding:14px 15px}}


/* === v16.11 catalog modal === */
.catalog-row{
  margin:0 0 10px;
  border:1px solid #4e3b30;
  border-radius:18px;
  background:linear-gradient(145deg,rgba(255,255,255,.035),transparent 45%),var(--paper);
  overflow:hidden;
  transition:border-color .2s,box-shadow .2s,transform .2s;
}
.catalog-row:hover{border-color:#8a5a3e;box-shadow:0 8px 22px rgba(0,0,0,.22);transform:translateY(-2px)}
.catalog-open{
  width:100%;
  border:0;
  background:transparent;
  color:var(--ink);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 20px;
  text-align:left;
  cursor:pointer;
  font:inherit;
}
.catalog-name{display:flex;flex-direction:column;gap:4px;min-width:0}
.catalog-name strong{font-size:19px}
.catalog-name small{color:var(--muted);font-size:13px}
.catalog-open-arrow{flex:0 0 auto;color:var(--accent);font-size:12px;font-weight:850}
body.modal-open{overflow:hidden}
.electrode-modal{
  position:fixed;
  inset:0;
  z-index:100;
  display:none;
}
.electrode-modal.is-open{display:block}
.electrode-modal-backdrop{
  position:absolute;
  inset:0;
  background:rgba(0,0,0,.72);
  backdrop-filter:blur(7px);
}
.electrode-modal-window{
  position:absolute;
  inset:clamp(12px,4vh,42px) clamp(12px,5vw,80px);
  display:flex;
  flex-direction:column;
  min-height:0;
  border:1px solid #76513b;
  border-radius:24px;
  background:linear-gradient(145deg,rgba(255,255,255,.035),transparent 45%),var(--bg-2);
  box-shadow:0 25px 80px rgba(0,0,0,.55),0 0 35px rgba(255,138,69,.08);
  overflow:hidden;
  animation:modalIn .2s ease-out;
}
.electrode-modal-head{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:15px;
  padding:15px 20px;
  border-bottom:1px solid var(--line-soft);
  background:rgba(23,25,27,.94);
}
.electrode-modal-close{
  width:38px;
  height:38px;
  border:1px solid #66412e;
  border-radius:12px;
  background:#25292c;
  color:var(--ink);
  font-size:26px;
  line-height:1;
  cursor:pointer;
}
.electrode-modal-close:hover{border-color:var(--accent);color:var(--accent)}
.electrode-modal-scroll{
  flex:1 1 auto;
  min-height:0;
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:24px clamp(16px,4vw,42px) 38px;
}
.catalog-modal-inner{max-width:980px;margin:0 auto}
.catalog-modal-inner .electrode-card-top{margin-bottom:22px}
.catalog-modal-inner .lead{max-width:700px}
@keyframes modalIn{
  from{opacity:0;transform:translateY(12px) scale(.985)}
  to{opacity:1;transform:translateY(0) scale(1)}
}
@media(max-width:640px){
  .catalog-open{padding:16px 15px}
  .catalog-name strong{font-size:17px}
  .catalog-open-arrow{font-size:11px}
  .electrode-modal-window{inset:0;border-radius:0;border:0}
  .electrode-modal-head{padding:12px 14px}
  .electrode-modal-scroll{padding:18px 13px 28px}
}


.catalog-group{margin:18px 0;border:1px solid var(--line,#dfe3e8);border-radius:18px;overflow:hidden;background:var(--card,#fff)}
.catalog-group>summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:16px;align-items:center;padding:18px 20px;font-weight:700}
.catalog-group>summary::-webkit-details-marker{display:none}
.catalog-group>summary span{display:flex;flex-direction:column;gap:5px}
.catalog-group>summary small{font-weight:400;opacity:.72;line-height:1.4}
.catalog-group>summary em{font-style:normal;white-space:nowrap;opacity:.7;font-size:.9em}
.catalog-group-list{border-top:1px solid var(--line,#dfe3e8)}
.catalog-group .catalog-row{margin:0;border:0;border-bottom:1px solid var(--line,#dfe3e8)}
.catalog-group .catalog-row:last-child{border-bottom:0}


/* === v16.15 — красивые группы каталога электродов === */
.catalog-section{
  margin-top:30px;
}
.catalog-group{
  position:relative;
  margin:16px 0;
  border:1px solid #5c402f;
  border-radius:22px;
  overflow:hidden;
  background:
    linear-gradient(145deg,rgba(255,255,255,.028),transparent 45%),
    var(--paper);
  box-shadow:
    0 8px 26px rgba(0,0,0,.22),
    inset 0 0 0 1px rgba(255,180,100,.018);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.catalog-group::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(135deg,rgba(255,138,69,.055),transparent 38%,rgba(97,216,208,.025));
}
.catalog-group:hover{
  transform:translateY(-3px);
  border-color:#9a6040;
  box-shadow:
    0 14px 34px rgba(0,0,0,.30),
    0 0 18px rgba(255,138,69,.07);
}
.catalog-group>summary{
  position:relative;
  z-index:1;
  list-style:none;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  gap:18px;
  align-items:center;
  padding:20px 22px;
  color:var(--ink);
  font-weight:800;
  transition:background .25s ease,padding .25s ease;
}
.catalog-group>summary::-webkit-details-marker{display:none}
.catalog-group>summary::after{
  content:"⌄";
  flex:0 0 auto;
  width:34px;
  height:34px;
  display:grid;
  place-items:center;
  border:1px solid #68452f;
  border-radius:11px;
  background:#25282b;
  color:var(--accent);
  font-size:19px;
  line-height:1;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.catalog-group[open]>summary::after{
  transform:rotate(180deg);
  border-color:#a96643;
  box-shadow:0 0 14px rgba(255,138,69,.12);
}
.catalog-group>summary:hover{
  background:rgba(255,138,69,.035);
}
.catalog-group>summary span{
  display:flex;
  flex-direction:column;
  gap:5px;
  min-width:0;
}
.catalog-group>summary span strong{
  font-size:19px;
  letter-spacing:-.01em;
}
.catalog-group>summary small{
  color:var(--muted);
  font-weight:500;
  line-height:1.45;
}
.catalog-group>summary em{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:34px;
  height:26px;
  padding:0 9px;
  margin-left:auto;
  border:1px solid #62422f;
  border-radius:999px;
  background:#252321;
  color:#d8a06f;
  font-style:normal;
  font-size:12px;
  font-weight:800;
}
.catalog-group-list{
  position:relative;
  z-index:1;
  border-top:1px solid #44332a;
  background:rgba(0,0,0,.10);
  padding:8px 10px 10px;
}
.catalog-group .catalog-row{
  margin:0;
  border:1px solid transparent;
  border-bottom:1px solid #3d322c;
  border-radius:14px;
  background:transparent;
  transform:none;
}
.catalog-group .catalog-row:last-child{border-bottom:0}
.catalog-group .catalog-row:hover{
  border-color:#684731;
  background:rgba(255,138,69,.035);
  box-shadow:0 6px 18px rgba(0,0,0,.18);
  transform:none;
}
.catalog-group .catalog-open{
  padding:15px 14px;
}
.catalog-group .catalog-name strong{
  font-size:17px;
}
.catalog-group .catalog-open-arrow{
  width:31px;
  height:31px;
  display:grid;
  place-items:center;
  border:1px solid #5d402f;
  border-radius:10px;
  background:#25282b;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.catalog-group .catalog-row:hover .catalog-open-arrow{
  transform:translateX(3px);
  border-color:var(--accent);
  box-shadow:0 0 12px rgba(255,138,69,.10);
}
.catalog-group[open] .catalog-group-list{
  animation:catalogGroupIn .24s ease-out;
}
@keyframes catalogGroupIn{
  from{opacity:0;transform:translateY(-5px)}
  to{opacity:1;transform:translateY(0)}
}
@media(max-width:640px){
  .catalog-group{border-radius:19px;margin:13px 0}
  .catalog-group>summary{padding:17px 15px;gap:12px}
  .catalog-group>summary span strong{font-size:17px}
  .catalog-group>summary small{font-size:12px}
  .catalog-group>summary::after{width:31px;height:31px}
  .catalog-group-list{padding:6px}
  .catalog-group .catalog-open{padding:14px 11px}
}
@media(prefers-reduced-motion:reduce){
  .catalog-group,.catalog-group>summary,.catalog-group>summary::after,
  .catalog-group .catalog-open-arrow{transition:none}
  .catalog-group[open] .catalog-group-list{animation:none}
}


/* === v16.17 — фирменное имя + бегущая строка === */
.brand{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:54px;
  padding-right:92px;
  font-size:clamp(20px,2.2vw,28px);
  font-weight:900;
  letter-spacing:.015em;
  color:#fff3e7;
  text-shadow:
    0 0 7px rgba(255,138,69,.42),
    0 0 22px rgba(255,138,69,.22);
}
.brand::before{
  content:"";
  position:absolute;
  left:-8px;
  right:58px;
  bottom:3px;
  height:2px;
  border-radius:999px;
  background:linear-gradient(90deg,transparent,var(--accent),rgba(255,196,107,.65),transparent);
  opacity:.75;
  filter:blur(.2px);
}
.brand::after{
  content:"";
  position:absolute;
  right:-2px;
  top:50%;
  width:88px;
  height:78px;
  transform:translateY(-50%);
  background:url('../images/welding_glove_holder.png') center/contain no-repeat;
  filter:drop-shadow(0 0 8px rgba(255,138,69,.25));
  pointer-events:none;
}

.site-ticker{
  position:relative;
  z-index:8;
  overflow:hidden;
  margin:0 clamp(15px,5vw,70px);
  border:1px solid rgba(255,138,69,.42);
  border-radius:13px;
  background:linear-gradient(180deg,rgba(45,29,21,.82),rgba(29,25,23,.78));
  box-shadow:
    0 0 13px rgba(255,138,69,.08),
    inset 0 0 14px rgba(255,138,69,.035);
}
.site-ticker::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(255,138,69,.08),transparent 18%,transparent 82%,rgba(255,138,69,.08));
  pointer-events:none;
}
.site-ticker-track{
  display:flex;
  width:max-content;
  animation:tickerMove 34s linear infinite;
  will-change:transform;
}
.site-ticker-track span{
  display:block;
  padding:9px 55px 9px 20px;
  color:#ffb06f;
  font-size:13px;
  font-weight:650;
  letter-spacing:.01em;
  white-space:nowrap;
  text-shadow:0 0 9px rgba(255,138,69,.28);
}
.site-ticker:hover .site-ticker-track{animation-play-state:paused}
@keyframes tickerMove{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}

@media(max-width:520px){
  header{padding:10px 15px}
  .brand{font-size:20px;min-height:47px;padding-right:66px}
  .brand::after{width:64px;height:60px;right:-1px}
  .brand::before{right:42px}
  .site-ticker{margin:0 10px;border-radius:11px}
  .site-ticker-track span{padding:8px 42px 8px 15px;font-size:12px}
}


/* === v16.18 — подборщик на главной + чистая шапка === */
.brand{padding-right:0}
.brand::after{display:none}
.brand::before{right:-8px}

.home-picker-card{
  position:relative;
  display:block;
  width:min(100%, 430px);
  margin:0 0 18px auto;
  transform:translateY(-8px);
  overflow:hidden;
  padding:22px 24px 20px;
  border:1px solid rgba(255,167,86,.78);
  border-radius:24px;
  background:
    linear-gradient(145deg,rgba(255,138,69,.12),rgba(255,255,255,.018) 48%,rgba(255,138,69,.035)),
    var(--paper);
  box-shadow:
    0 12px 34px rgba(0,0,0,.30),
    0 0 10px rgba(255,138,69,.18),
    0 0 28px rgba(255,138,69,.08),
    inset 0 0 18px rgba(255,138,69,.035);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.home-picker-card:hover{
  transform:translateY(-12px);
  border-color:#ffb36f;
  box-shadow:
    0 18px 42px rgba(0,0,0,.38),
    0 0 16px rgba(255,138,69,.28),
    0 0 38px rgba(255,138,69,.11),
    inset 0 0 20px rgba(255,138,69,.045);
}
.home-picker-card:active{transform:translateY(-5px) scale(.988)}
.home-picker-glow{
  position:absolute;
  width:170px;height:170px;
  right:-70px;bottom:-90px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,69,.24),transparent 68%);
  pointer-events:none;
}
.home-picker-kicker{
  position:relative;z-index:1;
  display:inline-block;
  margin-bottom:6px;
  color:#ffb36f;
  font-size:10px;
  font-weight:900;
  letter-spacing:.14em;
  text-shadow:0 0 10px rgba(255,138,69,.25);
}
.home-picker-card h2{position:relative;z-index:1;margin:2px 0 7px;font-size:25px}
.home-picker-card p{position:relative;z-index:1;margin:0;color:var(--muted);font-size:14px;line-height:1.55}
.home-picker-action{
  position:relative;z-index:1;
  display:flex;justify-content:space-between;align-items:center;
  margin-top:15px;padding-top:12px;
  border-top:1px solid rgba(255,138,69,.18);
  color:#ffc47a;font-weight:800;font-size:13px;
}
.home-picker-action b{font-size:21px;line-height:1;transition:transform .2s ease}
.home-picker-card:hover .home-picker-action b{transform:translateX(5px)}

@media(max-width:820px){
  .home-picker-card{width:100%;margin:0 0 16px;transform:none}
  .home-picker-card:hover{transform:translateY(-4px)}
}
@media(max-width:520px){
  .brand{padding-right:0}
  .brand::before{right:-5px}
  .home-picker-card{padding:19px 18px;border-radius:20px}
  .home-picker-card h2{font-size:21px}
}

/* Переходы из практических разделов в теорию */
.topic-theory-link{margin-top:18px;padding-top:12px;border-top:1px solid rgba(255,136,32,.18)}
.topic-theory-link a{display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border:1px solid rgba(255,136,32,.45);border-radius:10px;color:#ffad5a;text-decoration:none;background:rgba(255,136,32,.06);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,background .2s ease}
.topic-theory-link a:hover{transform:translateY(-1px);border-color:rgba(255,153,64,.8);background:rgba(255,136,32,.1);box-shadow:0 0 18px rgba(255,115,20,.18)}
.theory-intro{margin:0 0 20px;padding:14px 16px;border:1px solid rgba(255,136,32,.22);border-radius:14px;background:rgba(255,136,32,.035)}
.theory-detail{margin:22px 0;padding:22px;border:1px solid rgba(255,255,255,.08);border-radius:16px;background:rgba(255,255,255,.025);scroll-margin-top:22px}
.theory-detail h2{margin-top:0}
.theory-detail h3{margin-bottom:8px}
.theory-detail p,.theory-detail li{line-height:1.7}
.theory-detail a{color:#ffad5a}
@media (max-width:700px){.theory-detail{padding:17px}.topic-theory-link a{width:100%;justify-content:center;box-sizing:border-box}}


/* === v16.20 — цвета разделов === */
.section-page{--section-accent:var(--accent);--section-glow:rgba(255,138,69,.10)}
.section-page.section-welding{--section-accent:#ff7b45;--section-glow:rgba(255,123,69,.12)}
.section-page.section-metals{--section-accent:#69d8d0;--section-glow:rgba(105,216,208,.10)}
.section-page.section-electrodes{--section-accent:#ffd166;--section-glow:rgba(255,209,102,.10)}
.section-page.section-workpieces{--section-accent:#8fb8ff;--section-glow:rgba(143,184,255,.10)}
.section-page.section-defects{--section-accent:#ff687d;--section-glow:rgba(255,104,125,.10)}
.section-page.section-theory{--section-accent:#bd8cff;--section-glow:rgba(189,140,255,.10)}
.section-page{background:
  radial-gradient(circle at 85% 18%,var(--section-glow),transparent 30%),
  linear-gradient(145deg,var(--bg),var(--bg-2));}
.section-page header{border-bottom-color:color-mix(in srgb,var(--section-accent) 34%,transparent);}
.section-page .back,.section-page .eyebrow{color:var(--section-accent);}
.section-page .head h1,.section-page .intro h1{text-shadow:0 0 28px color-mix(in srgb,var(--section-accent) 20%,transparent);}
.section-page .branch{--card-accent:var(--section-accent);--card-glow:var(--section-glow);}
.grid .card.section-welding{--card-accent:#ff7b45;--card-glow:rgba(255,123,69,.22)}
.grid .card.section-metals{--card-accent:#69d8d0;--card-glow:rgba(105,216,208,.20)}
.grid .card.section-electrodes{--card-accent:#ffd166;--card-glow:rgba(255,209,102,.20)}
.grid .card.section-workpieces{--card-accent:#8fb8ff;--card-glow:rgba(143,184,255,.20)}
.grid .card.section-defects{--card-accent:#ff687d;--card-glow:rgba(255,104,125,.20)}
.grid .card.section-theory{--card-accent:#bd8cff;--card-glow:rgba(189,140,255,.20)}

/* === v16.20 — теория в отдельных окнах === */
body.modal-open{overflow:hidden;}
.theory-detail[hidden]{display:none!important}
.theory-modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:24px;}
.theory-modal-backdrop{position:absolute;inset:0;background:rgba(5,7,8,.78);backdrop-filter:blur(7px);}
.theory-modal-dialog{position:relative;z-index:1;width:min(900px,100%);max-height:min(86vh,900px);overflow:hidden;background:linear-gradient(145deg,#24282b,#1b1e21);border:1px solid #9b70c8;border-radius:26px;box-shadow:0 25px 80px rgba(0,0,0,.60),0 0 30px rgba(189,140,255,.15);display:flex;flex-direction:column;}
.theory-modal-content{overflow:auto;padding:34px 34px 18px;scrollbar-width:thin;}
.theory-modal-content .theory-detail{display:block!important;}
.theory-modal-content h2{margin-top:0;color:#e4caff;font-size:clamp(25px,4vw,34px);}
.theory-modal-close{position:absolute;right:13px;top:10px;width:38px;height:38px;border:1px solid rgba(255,255,255,.14);border-radius:50%;background:#2a2e31;color:#eee;font-size:27px;line-height:1;cursor:pointer;z-index:3;transition:.2s;}
.theory-modal-close:hover{border-color:#bd8cff;box-shadow:0 0 18px rgba(189,140,255,.24);transform:rotate(4deg);}
.theory-modal-note{flex:none;margin:0 34px 25px;padding:11px 15px;text-align:right;color:#bda7ce;font-size:13px;border-top:1px solid rgba(189,140,255,.18);font-style:italic;}
@media(max-width:620px){.theory-modal{padding:10px}.theory-modal-dialog{max-height:91vh;border-radius:20px}.theory-modal-content{padding:28px 20px 14px}.theory-modal-note{margin:0 20px 18px;font-size:12px}}