/* ==========================================================================
   Combustion Components — shared stylesheet
   ========================================================================== */

:root{
  --bg: #1B1E22;
  --panel: #22262B;
  --panel-2: #262A30;
  --line: #34393F;
  --ink: #E8E9EA;
  --ink-dim: #B7BDC3;
  --blue: #284B86;
  --blue-light: #4C74B8;
  --blue-dim: #1B2E52;
  --orange: #FF8601;
  --red: #AE1E15;
  --white: #ffffff;
  --radius: 4px;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter', 'IBM Plex Sans', Arial, sans-serif;
  font-weight:500;
  line-height:1.6;
  min-height:100vh;
}
h1,h2,h3,h4{
  font-family:'Space Grotesk', Arial, sans-serif;
  font-weight:600;
  letter-spacing:-0.01em;
  color:var(--white);
  line-height:1.2;
}
.mono{font-family:'IBM Plex Mono', monospace; letter-spacing:0.02em;}
img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
ul{list-style:none;}

.wrap{max-width:1600px; margin:0 auto; padding:0 56px;}
main{display:block;}

/* ===== header / nav ===== */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(27,30,34,0.94); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex; align-items:center; justify-content:space-between; padding:16px 0;}
.logo{display:flex; align-items:center; gap:12px;}
.logo img{height:44px; width:auto;}
.logo-text{font-family:'Space Grotesk'; font-weight:700; font-size:18px; color:var(--white); letter-spacing:0.01em;}

#mobile-nav-toggle{
  display:none; position:relative; width:26px; height:22px;
  background:none; border:none; padding:0; cursor:pointer;
}
#mobile-nav-toggle .bar{
  position:absolute; left:0; width:100%; height:2px; border-radius:2px;
  background:var(--white); transition:transform .3s ease, opacity .25s ease;
}
#mobile-nav-toggle .bar:nth-child(1){top:2px;}
#mobile-nav-toggle .bar:nth-child(2){top:10px;}
#mobile-nav-toggle .bar:nth-child(3){top:18px;}

#mobile-nav-toggle .flame-icon{
  position:absolute; top:50%; left:50%; width:20px; height:20px;
  transform:translate(-50%,-50%) scale(0.3); opacity:0;
  fill:var(--orange); stroke:var(--red); stroke-width:0.6;
  transition:transform .35s cubic-bezier(.34,1.56,.64,1), opacity .3s ease;
  pointer-events:none;
}

#mobile-nav-toggle.active .bar{opacity:0;}
#mobile-nav-toggle.active .bar:nth-child(1){transform:translateY(8px) scaleX(0);}
#mobile-nav-toggle.active .bar:nth-child(3){transform:translateY(-8px) scaleX(0);}
#mobile-nav-toggle.active .flame-icon{
  opacity:1; transform:translate(-50%,-50%) scale(1);
  animation:flame-flicker 1.1s ease-in-out infinite;
}
@keyframes flame-flicker{
  0%,100%{transform:translate(-50%,-50%) scale(1) rotate(-3deg);}
  50%{transform:translate(-50%,-50%) scale(1.1) rotate(3deg);}
}

.navlinks{display:flex; gap:32px; font-size:13px; letter-spacing:0.04em; text-transform:uppercase; color:var(--ink-dim);}
.navlinks li{position:relative;}
.navlinks a{padding-bottom:4px; transition:color .2s; display:block;}
.navlinks a:hover{color:var(--white);}
.navlinks li.active > a{color:var(--orange);}
.navlinks li.active > a::after{content:''; position:absolute; left:0; right:0; bottom:-8px; height:2px; background:var(--orange);}

/* dropdown for products */
.has-dropdown{position:relative;}
.dropdown{
  position:absolute; top:calc(100% + 20px); left:50%; transform:translateX(-50%);
  background:var(--panel-2); border:1px solid var(--line); border-radius:var(--radius);
  padding:8px; min-width:200px; display:none; flex-direction:column;
}
.has-dropdown:hover .dropdown{display:flex;}
.dropdown a{padding:9px 14px; font-size:12.5px; border-radius:3px; color:var(--ink-dim);}
.dropdown a:hover{background:var(--panel); color:var(--white);}

@media (max-width:900px){
  #mobile-nav-toggle{display:block; margin-left:auto; padding-left:5px;}
  .navlinks{
    display:none; position:absolute; top:100%; left:0; right:0;
    background:var(--panel); flex-direction:column; gap:0; border-top:1px solid var(--line);
  }
  .navlinks.open{display:flex;}
  .navlinks li{width:100%;}
  .navlinks a{padding:16px 32px;}
  .navlinks li.active > a::after{display:none;}
  .has-dropdown .dropdown{position:static; transform:none; display:none; border:none; background:var(--panel-2); margin:0 16px 8px;}
  .has-dropdown.open .dropdown{display:flex;}
}

/* ===== page hero (used on interior pages) ===== */
.page-hero{
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(27,30,34,0.4), rgba(27,30,34,0.92)),
    repeating-linear-gradient(0deg, rgba(76,116,184,0.05) 0 1px, transparent 1px 30px),
    repeating-linear-gradient(90deg, rgba(76,116,184,0.05) 0 1px, transparent 1px 30px);
  padding:38px 0 32px;
}
.page-hero .eyebrow{margin-bottom:14px;}
.page-hero h1{font-size:34px;}
.page-hero p.lead{color:var(--ink-dim); font-size:15px; max-width:560px; margin-top:14px;}
.breadcrumb{font-size:12.5px; color:var(--ink-dim); margin-top:18px; font-family:'IBM Plex Mono';}
.breadcrumb a{color:var(--blue-light);}

/* ===== hero (homepage) ===== */
/* ===== homepage intro: flame ignition + staggered hero reveal ===== */
.intro-overlay{
  position:fixed; inset:0; z-index:500; background:var(--bg);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:18px;
  animation:intro-fadeout 0.6s ease 1.8s forwards;
}
.intro-glow{
  position:absolute; width:260px; height:260px; border-radius:50%;
  background:radial-gradient(circle, rgba(255,134,1,0.22), rgba(174,30,21,0.10) 55%, transparent 75%);
  animation:intro-glow-pulse 1.4s ease-in-out infinite;
}
@keyframes intro-glow-pulse{
  0%,100%{transform:scale(0.85); opacity:0.6;}
  50%{transform:scale(1.1); opacity:1;}
}
.intro-overlay .intro-flame{
  position:relative; width:70px; height:70px; fill:var(--orange); stroke:var(--red); stroke-width:0.6;
  opacity:0; transform:scale(0.3);
  animation:intro-flame-in 0.7s cubic-bezier(.34,1.56,.64,1) forwards,
            intro-flicker 1.1s ease-in-out 0.7s infinite;
}
@keyframes intro-flame-in{to{opacity:1; transform:scale(1);}}
@keyframes intro-flicker{
  0%,100%{transform:scale(1) rotate(-3deg);}
  50%{transform:scale(1.08) rotate(3deg);}
}
.ember{
  position:absolute; left:50%; top:52%; width:4px; height:4px; border-radius:50%;
  background:var(--orange); opacity:0;
  animation:ember-rise 1.4s ease-in infinite;
}
.ember.e1{animation-delay:0.3s; margin-left:-14px;}
.ember.e2{animation-delay:0.6s; margin-left:6px; background:var(--red);}
.ember.e3{animation-delay:0.9s; margin-left:-3px;}
@keyframes ember-rise{
  0%{opacity:0; transform:translateY(0) scale(1);}
  15%{opacity:1;}
  100%{opacity:0; transform:translateY(-70px) scale(0.4);}
}
.intro-wordmark{
  font-family:'Space Grotesk'; font-weight:700; font-size:15px; letter-spacing:0.14em;
  color:var(--white); opacity:0; transform:translateY(8px);
  animation:intro-wordmark-in 0.6s ease 0.5s forwards;
}
@keyframes intro-wordmark-in{to{opacity:1; transform:translateY(0);}}
@keyframes intro-fadeout{to{opacity:0; visibility:hidden; pointer-events:none;}}

@keyframes hero-reveal{to{opacity:1; transform:translateY(0);}}
.hero-inner > div > .eyebrow{opacity:0; transform:translateY(14px); animation:hero-reveal .55s ease forwards; animation-delay:1.8s;}
.hero-inner > div > h1{opacity:0; transform:translateY(14px); animation:hero-reveal .55s ease forwards; animation-delay:1.95s;}
.hero-inner > div > p.lead{opacity:0; transform:translateY(14px); animation:hero-reveal .55s ease forwards; animation-delay:2.1s;}
.hero-inner > div > .hero-ctas{opacity:0; transform:translateY(14px); animation:hero-reveal .55s ease forwards; animation-delay:2.25s;}
.hero-inner > .schematic{opacity:0; transform:translateY(14px); animation:hero-reveal .6s ease forwards; animation-delay:1.95s;}

.hero{position:relative; overflow:hidden; border-bottom:1px solid var(--line); padding:20px 0 34px;}
.hero-inner{position:relative; display:grid; grid-template-columns:1.05fr 0.95fr; gap:40px; align-items:center;}
.eyebrow{
  font-family:'IBM Plex Mono'; font-size:13.5px; color:var(--blue-light);
  letter-spacing:0.07em; text-transform:uppercase; margin-bottom:16px;
  display:flex; align-items:center; gap:10px;
}
.eyebrow::before{content:''; width:8px; height:8px; border-radius:50%; background:var(--orange); box-shadow:0 0 0 3px rgba(255,134,1,0.18); flex-shrink:0;}
.hero h1{font-size:42px; line-height:1.14; max-width:560px;}
.hero p.lead{color:var(--ink-dim); font-size:16px; max-width:480px; margin-top:20px;}
.hero-ctas{display:flex; gap:14px; margin-top:30px; flex-wrap:wrap;}

.btn{display:inline-block; padding:13px 24px; font-size:13.5px; font-weight:500; letter-spacing:0.02em; border-radius:3px; transition:all .2s; border:1px solid transparent; cursor:pointer;}
.btn-primary{background:var(--orange); color:#20140a;}
.btn-primary:hover{background:#ff9a2b;}
.btn-ghost{border-color:var(--line); color:var(--ink);}
.btn-ghost:hover{border-color:var(--blue-light); color:var(--blue-light);}

.schematic{position:relative; height:320px; border:1px solid var(--line); border-radius:var(--radius); background:var(--panel);}
.schematic svg{width:100%; height:100%;}
.flow-dash{stroke-dasharray:6 6; animation:flow 2.4s linear infinite;}
@keyframes flow{to{stroke-dashoffset:-24;}}
.schem-label{font-family:'IBM Plex Mono'; font-size:10px; fill:var(--ink-dim); letter-spacing:0.04em;}

/* ===== stats strip ===== */
.stats{
  position:relative; overflow:hidden; border-bottom:1px solid var(--line); background:var(--panel);
}
.stats::before{
  content:''; position:absolute; top:0; bottom:0; left:-35%; width:35%;
  background:linear-gradient(90deg, transparent, rgba(174,30,21,0.22), transparent);
  animation:stats-sweep 8s ease-in-out infinite;
  pointer-events:none;
}
@keyframes stats-sweep{
  0%{left:-35%;}
  85%{left:100%;}
  100%{left:100%;}
}
.stats .wrap{position:relative; z-index:1; display:flex; padding:22px 32px;}
.stat{flex:1; min-width:150px; padding:8px 28px; border-left:1px solid var(--line); text-align:center;}
.stat:first-child{border-left:none;}
.stat .num{font-family:'Space Grotesk'; font-size:21px; color:var(--white); font-weight:600;}
.stat .label{font-size:11.5px; color:var(--ink-dim); margin-top:2px; text-transform:uppercase; letter-spacing:0.03em;}

/* ===== generic sections ===== */
section{padding:32px 0;}
section:nth-of-type(odd){
  background:linear-gradient(180deg, rgba(40,75,134,0.08), rgba(40,75,134,0.02));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
section:nth-of-type(even){
  background:linear-gradient(180deg, rgba(255,134,1,0.055), rgba(255,134,1,0.015));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
section.hero, section.page-hero{background:none; border:none;}
.section-head{display:flex; justify-content:space-between; align-items:flex-end; margin-bottom:38px; gap:20px; flex-wrap:wrap;}
.section-head h2{font-size:27px;}
.section-head p{color:var(--ink-dim); font-size:14px; max-width:420px;}

/* ===== services ===== */
.svc-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line);}
.svc-card{background:var(--panel); padding:26px 24px; transition:background .2s;}
.svc-card:hover{background:var(--panel-2);}
.svc-card .tag{font-family:'IBM Plex Mono'; font-size:11px; color:var(--orange); letter-spacing:0.05em;}
.svc-card h4{font-size:15px; margin-top:10px; font-weight:600; color:var(--white);}

.industry-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-top:10px;}
.industry-pill{
  border:1px solid var(--line); border-radius:var(--radius); padding:16px 18px;
  font-size:13px; color:var(--ink-dim); background:var(--panel);
}

/* ===== compliance strip ===== */
.compliance{background:var(--panel); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.comp-row{display:flex; gap:16px; justify-content:space-between; padding:28px 0;}
.comp-pill{
  font-family:'IBM Plex Mono'; font-size:12px; color:var(--ink-dim);
  border:1px solid var(--line); border-radius:20px; padding:8px 16px;
  display:flex; align-items:center; gap:8px;
}
.comp-pill::before{content:'✓'; color:var(--blue-light); font-weight:700;}

/* ===== products ===== */
.prod-tabs{display:flex; gap:8px; margin-bottom:36px; flex-wrap:wrap; border-bottom:1px solid var(--line);}
.prod-tab{
  font-family:'IBM Plex Mono'; font-size:12.5px; letter-spacing:0.03em; text-transform:uppercase;
  padding:12px 4px; color:var(--ink-dim); border-bottom:2px solid transparent; margin-right:24px; cursor:pointer;
}
.prod-tab.active{color:var(--orange); border-bottom-color:var(--orange);}

.prod-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.prod-card{border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; background:var(--panel);}
.prod-thumb{height:170px; background:linear-gradient(135deg, var(--blue-dim), #1c2226); display:flex; align-items:center; justify-content:center;}
.prod-thumb img{width:100%; height:100%; object-fit:cover;}
.prod-thumb svg{width:52px; height:52px; opacity:0.9;}
.prod-body{padding:18px 20px;}
.prod-body .mono{font-size:11px; color:var(--orange);}
.prod-body h4{font-size:16px; margin-top:8px;}
.prod-body p{font-size:13px; color:var(--ink-dim); margin-top:6px;}

.product-section{padding:56px 0; border-top:1px solid var(--line);}
.product-section:first-of-type{border-top:none;}
.spec-list{margin-top:20px; display:grid; grid-template-columns:repeat(2,1fr); gap:10px 30px;}
.spec-list li{font-size:13.5px; color:var(--ink-dim); padding:9px 0; border-bottom:1px solid var(--line); display:flex; gap:10px;}
.spec-list li::before{content:'→'; color:var(--orange);}

/* subcategory tile grid (like the old site's category pages, just bigger) */
.subcat-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:18px;}
.subcat-tile{
  border:1px solid var(--line); border-radius:6px; background:var(--panel);
  overflow:hidden; cursor:pointer; transition:border-color .2s, transform .2s;
}
.subcat-tile:hover{border-color:var(--blue-light); transform:translateY(-2px);}
.subcat-tile.active{border-color:var(--orange);}
.subcat-thumb{aspect-ratio:1; background:#f4f4f4; display:flex; align-items:center; justify-content:center; overflow:hidden;}
.subcat-thumb img{width:100%; height:100%; object-fit:contain; padding:10px;}
.subcat-info{display:flex; align-items:center; justify-content:space-between; gap:10px; padding:14px 16px;}
.subcat-label{font-family:'Space Grotesk'; font-weight:600; font-size:14.5px; color:var(--white); line-height:1.3;}
.subcat-count{font-family:'IBM Plex Mono'; font-size:11.5px; color:var(--blue-light); background:var(--panel-2); border:1px solid var(--line); border-radius:12px; padding:3px 9px; flex-shrink:0;}

/* detail panel that opens below the grid when a tile is clicked */
.subcat-detail{margin-top:8px;}
.detail-panel{
  display:none; border:1px solid var(--line); border-radius:6px; background:var(--panel);
  padding:26px 28px; margin-top:24px;
}
.detail-panel.open{
  display:block;
  position:fixed; top:50%; left:50%; transform:translate(-50%,-50%);
  width:min(900px, 92vw); max-height:82vh; overflow-y:auto;
  margin-top:0; z-index:201;
  box-shadow:0 24px 70px rgba(0,0,0,0.55);
}
.subcat-backdrop{
  position:fixed; inset:0; background:rgba(0,0,0,0.55);
  z-index:200; opacity:0; pointer-events:none; transition:opacity .2s ease;
}
.subcat-backdrop.open{opacity:1; pointer-events:auto;}
.detail-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:6px;}
.detail-head h3{font-size:19px;}
.detail-close{
  background:var(--panel-2); border:1px solid var(--line); color:var(--ink-dim);
  width:30px; height:30px; border-radius:50%; font-size:18px; line-height:1; cursor:pointer;
}
.detail-close:hover{color:var(--orange); border-color:var(--orange);}

.acc-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-top:18px;}
.mini-card{border:1px solid var(--line); border-radius:5px; background:var(--panel-2); overflow:hidden; transition:border-color .2s;}
.mini-card:hover{border-color:var(--blue-light);}
.mini-thumb{aspect-ratio:1; background:#f4f4f4; display:flex; align-items:center; justify-content:center; overflow:hidden;}
.mini-thumb img{width:100%; height:100%; object-fit:contain; padding:6px;}
.mini-name{font-size:12.5px; color:var(--ink-dim); padding:10px 12px; line-height:1.45;}

@media (max-width:900px){
  .subcat-grid{grid-template-columns:repeat(2,1fr);}
  .acc-grid{grid-template-columns:repeat(2,1fr);}
}

/* ===== partners ===== */
.partner-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:18px;}
.partner-card{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:24px 24px 28px; text-align:center; transition:border-color .2s, transform .2s;
}
.partner-card:hover{border-color:var(--blue-light); transform:translateY(-2px);}
.partner-logo{
  background:#f4f4f4; border-radius:6px; height:90px; margin-bottom:16px;
  display:flex; align-items:center; justify-content:center; padding:14px;
}
.partner-logo img{max-height:100%; max-width:100%; object-fit:contain; display:block; margin:0 auto;}
.partner-name{font-family:'Space Grotesk'; font-weight:700; font-size:15.5px; color:var(--white); margin-bottom:4px;}
.partner-wordmark{font-family:'Space Grotesk'; font-weight:700; font-size:20px; color:var(--white); margin-bottom:6px;}
.partner-domain{font-family:'IBM Plex Mono'; font-size:12px; color:var(--blue-light);}
.partner-domain a{color:inherit;}
.partner-domain a:hover{text-decoration:underline;}

.partners-teaser{
  display:flex; align-items:center; justify-content:space-between; gap:30px;
  border:1px solid var(--line); border-radius:var(--radius); padding:36px 40px;
  background:linear-gradient(135deg, var(--panel), var(--panel-2)); flex-wrap:wrap;
}
.partners-teaser h3{font-size:21px; max-width:420px;}
.partners-teaser p{color:var(--ink-dim); font-size:14px; margin-top:8px; max-width:420px;}
.logo-strip{display:flex; gap:14px; flex-wrap:wrap; align-items:center;}
.logo-chip{font-family:'Space Grotesk'; font-weight:700; font-size:12.5px; color:var(--ink-dim); border:1px solid var(--line); padding:8px 14px; border-radius:3px;}

/* ===== contact ===== */
.contact-grid{display:grid; grid-template-columns:0.8fr 1.2fr; gap:50px;}
.contact-info{display:flex; flex-direction:column; gap:28px;}
.info-block{display:flex; gap:16px;}
.info-block .icon{
  width:42px; height:42px; border-radius:var(--radius); background:var(--panel);
  border:1px solid var(--line); display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.info-block .icon svg{width:20px; height:20px; stroke:var(--orange);}
.info-block h4{font-size:14.5px; margin-bottom:6px;}
.info-block p{font-size:13.5px; color:var(--ink-dim); line-height:1.6;}

.form-heading{font-size:20px; margin-bottom:6px;}
.form-subheading{color:var(--ink-dim); font-size:13.5px; margin-bottom:22px; max-width:440px;}

.form-grid{display:grid; grid-template-columns:1fr 1fr; gap:16px;}
.form-grid .full{grid-column:1 / -1;}
label{font-size:12px; color:var(--ink-dim); text-transform:uppercase; letter-spacing:0.04em; margin-bottom:6px; display:block;}
input, textarea{
  width:100%; background:var(--panel); border:1px solid var(--line); border-radius:3px;
  padding:12px 14px; color:var(--ink); font-family:'Inter', 'IBM Plex Sans'; font-size:14px;
}
input:focus, textarea:focus{outline:none; border-color:var(--blue-light);}
textarea{resize:vertical; min-height:130px;}

.form-status{display:none; font-size:13.5px; padding:12px 16px; border-radius:4px; margin-bottom:16px;}
.form-status.success{display:block; background:rgba(76,116,184,0.12); border:1px solid var(--blue-light); color:var(--blue-light);}
.form-status.error{display:block; background:rgba(174,30,21,0.12); border:1px solid var(--red); color:#e8877e;}

.map-embed{border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; margin-top:40px; height:280px;}
.map-embed iframe{width:100%; height:100%; border:0; filter:grayscale(0.3) invert(0.9) contrast(0.9);}

/* ===== footer ===== */
footer{border-top:1px solid var(--line); padding:40px 0; background:var(--panel);}
.foot-row{display:flex; justify-content:space-between; flex-wrap:wrap; gap:20px; font-size:13px; color:var(--ink-dim);}
.foot-row a:hover{color:var(--orange);}

/* ===== responsive ===== */
@media (max-width:1500px){
  .wrap{padding:0 32px;}
}

@media (max-width:900px){
  .wrap{padding:0 24px;}
  .hero-inner{grid-template-columns:1fr;}
  .svc-grid, .prod-grid, .partner-grid{grid-template-columns:1fr;}
  .industry-grid{grid-template-columns:repeat(2,1fr);}
  .stats .wrap{flex-wrap:wrap;}
  .stat{border-left:none; padding-left:28px;}
  .comp-row{flex-wrap:wrap; justify-content:flex-start;}
  .contact-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .partners-teaser{flex-direction:column; align-items:flex-start;}
}

@media (max-width:560px){
  .wrap{padding:0 15px;}
}