/* ============================================================
   MetalFab Project Vault — design system
   Industrial SaaS: dark charcoal chrome, light working surfaces.
   ============================================================ */
:root{
  --chrome:#1c1f24; --chrome2:#23272e; --chrome-line:#31363e;
  --bg:#f4f4f2; --surface:#ffffff; --line:#e2e1dd; --line2:#cfcdc7;
  --ink:#22252a; --muted:#6d7076; --dim:#a8681f;
  --accent:#d97b2f; --accent-ink:#1c1207;
  --steel:#5b6674; --fill:#eeeeec;
  --ok:#2f7d4f; --warn:#8a6a10;
  --rad:10px; --rad-lg:14px;
  --shadow:0 1px 2px rgba(20,22,26,.06),0 4px 14px rgba(20,22,26,.05);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);font-size:15px;line-height:1.55}
img,svg{max-width:100%}
a{color:inherit}
button{font-family:inherit}

/* ---------------- layout ---------------- */
.app{display:flex;min-height:100vh}
.sidebar{
  width:232px;flex-shrink:0;background:linear-gradient(180deg,#20242a,#1a1d22);color:#c9cdd3;
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
  box-shadow:inset -1px 0 0 rgba(255,255,255,.04);
}
.main-col{flex:1;display:flex;flex-direction:column;min-width:0}
main{flex:1;padding:28px clamp(16px,3.4vw,44px) 60px;outline:none;max-width:1280px;width:100%;margin:0 auto}

.logo{display:flex;gap:10px;align-items:center;padding:20px 18px;border-bottom:1px solid var(--chrome-line)}
.logo-mark{
  background:linear-gradient(160deg,#e18a3e,#c76a24);color:#fff;font-weight:800;border-radius:8px;
  width:36px;height:36px;display:grid;place-items:center;font-size:.85rem;letter-spacing:.5px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 1px 3px rgba(0,0,0,.4);
}
.logo-text{font-size:.8rem;line-height:1.25;color:#9aa0a8}
.logo-text b{color:#f2f3f5;font-size:.92rem}
.sidebar nav{padding:12px 10px;display:flex;flex-direction:column;gap:2px}
.sidebar nav a{
  display:flex;gap:11px;align-items:center;padding:10px 12px;border-radius:8px;
  text-decoration:none;color:#b8bdc4;font-size:.92rem;font-weight:500;
}
.sidebar nav a .ic{width:19px;height:19px;opacity:.85}
.sidebar nav a:hover{background:var(--chrome2);color:#fff}
.sidebar nav a.on{background:var(--chrome2);color:#fff;box-shadow:inset 3px 0 0 var(--accent)}
.side-foot{margin-top:auto;padding:16px 18px;border-top:1px solid var(--chrome-line);font-size:.78rem;color:#8a9098}
.side-foot a{color:#c9cdd3;text-decoration:none;word-break:break-all}
.side-foot a:hover{color:#fff}

.topbar{
  display:flex;align-items:center;gap:12px;background:var(--surface);
  border-bottom:1px solid var(--line);padding:10px clamp(14px,3vw,28px);
  position:sticky;top:0;z-index:30;
}
.iconbtn{
  background:none;border:1px solid transparent;border-radius:8px;padding:7px;cursor:pointer;
  color:var(--muted);display:inline-flex;align-items:center;justify-content:center;text-decoration:none;
}
.iconbtn:hover{background:var(--bg);color:var(--ink)}
.iconbtn .ic{width:19px;height:19px}
#unitBtn{font-weight:700;font-size:.8rem;min-width:38px;border:1px solid var(--line2)}
.menu-btn{display:none}
.top-actions{display:flex;gap:4px}

.gsearch{position:relative;flex:1;max-width:560px;display:flex;align-items:center}
.gsearch>.ic{position:absolute;left:11px;width:17px;height:17px;color:var(--muted)}
.gsearch input{
  width:100%;padding:9px 12px 9px 36px;border:1px solid var(--line2);border-radius:9px;
  background:var(--bg);font-size:.92rem;color:var(--ink);
}
.gsearch input:focus{outline:2px solid var(--accent);outline-offset:-1px;background:#fff}
.gsearch-drop{
  position:absolute;top:calc(100% + 6px);left:0;right:0;background:#fff;border:1px solid var(--line);
  border-radius:10px;box-shadow:var(--shadow);overflow:hidden;z-index:40;
}
.gsearch-drop a{
  display:flex;gap:10px;align-items:baseline;padding:10px 14px;text-decoration:none;font-size:.88rem;
  border-bottom:1px solid var(--line);
}
.gsearch-drop a:hover{background:var(--bg)}
.gsearch-drop a b{white-space:nowrap}
.gsearch-drop a span{color:var(--muted);flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.gsearch-drop a code{font-family:var(--mono);font-size:.75rem;color:var(--dim)}
.gsearch-drop .see-all{justify-content:center;color:var(--accent);font-weight:600}
.gsearch-drop .no-res{padding:12px 14px;color:var(--muted);font-size:.88rem}

.app-foot{
  border-top:1px solid var(--line);padding:14px clamp(14px,3vw,28px);display:flex;flex-wrap:wrap;gap:8px 18px;
  justify-content:space-between;font-size:.8rem;color:var(--muted);background:var(--surface);
}
.foot-links{display:flex;gap:16px;flex-wrap:wrap}
.foot-links a{color:var(--muted);text-decoration:none}
.foot-links a:hover{color:var(--ink)}

/* ---------------- typography / bits ---------------- */
h1{font-size:clamp(1.45rem,1.1rem + 1.4vw,1.8rem);font-weight:800;letter-spacing:-.02em;line-height:1.25}
h2{font-size:1.15rem;font-weight:700}
h3{font-size:.98rem;font-weight:650}
.page-head{margin-bottom:22px}
.page-sub{color:var(--muted);max-width:640px;margin-top:6px;line-height:1.6}
.kicker{font-size:.72rem;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;color:var(--accent);margin-bottom:4px}
.sec-h{margin:34px 0 14px;display:flex;align-items:center;gap:10px}
.sec-h::before{content:"";width:18px;height:3px;background:var(--accent);border-radius:2px;flex-shrink:0}
.muted{color:var(--muted)}
.small{font-size:.8rem}
.mono{font-family:var(--mono)}

.btn{
  display:inline-flex;align-items:center;gap:8px;background:linear-gradient(180deg,#e0853a,#cf7127);color:#fff;
  border:1px solid var(--accent);border-radius:9px;padding:10px 18px;font-weight:650;font-size:.9rem;
  cursor:pointer;text-decoration:none;box-shadow:0 1px 2px rgba(20,22,26,.15);
  transition:filter .12s,transform .08s;
}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible,.iconbtn:focus-visible,.tab:focus-visible,.favbtn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn .ic{width:16px;height:16px}
.btn-sm{padding:7px 13px;font-size:.83rem}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line2);box-shadow:none}
.btn-ghost:hover{background:var(--bg);filter:none}
.row-btns{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}

.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--rad-lg);padding:18px;box-shadow:var(--shadow);margin-bottom:16px}
.notice{
  background:#fdf6ec;border:1px solid #ecd9b8;border-radius:var(--rad);padding:12px 14px;
  font-size:.86rem;color:#5c4a1e;margin-top:14px;
}
.chip{
  display:inline-block;background:var(--bg);border:1px solid var(--line2);border-radius:99px;
  padding:3px 11px;font-size:.76rem;font-weight:600;color:var(--muted);
}
.diff-beginner{color:var(--ok)} .diff-intermediate{color:var(--warn)} .diff-advanced{color:#a2452c}
.diff::before,.chip.diff-beginner::before,.chip.diff-intermediate::before,.chip.diff-advanced::before{
  content:"";display:inline-block;width:7px;height:7px;border-radius:99px;background:currentColor;margin-right:6px;vertical-align:1px;
}

/* ---------------- dashboard ---------------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:24px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--rad-lg);padding:16px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:1.45rem;font-weight:800;letter-spacing:-.01em;font-variant-numeric:tabular-nums}
.stat span{font-size:.78rem;color:var(--muted)}
.hero-search{
  background:radial-gradient(600px 220px at 85% -20%,rgba(217,123,47,.25),transparent 60%),linear-gradient(180deg,#23272e,#1c1f24);
  border:1px solid var(--chrome-line);border-radius:var(--rad-lg);padding:26px clamp(16px,3vw,34px);margin-bottom:20px;
}
.hero-kicker{font-size:.68rem;font-weight:800;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.hero-search h2{color:#fff;margin-bottom:12px;font-size:1.25rem}
.hs-box{position:relative;display:flex;align-items:center;max-width:640px}
.hs-box .ic{position:absolute;left:13px;width:18px;height:18px;color:var(--muted)}
.hs-box input{
  width:100%;padding:13px 14px 13px 40px;border-radius:10px;border:1px solid var(--chrome-line);
  font-size:.98rem;background:#fff;color:var(--ink);
}
.hs-box input:focus{outline:2px solid var(--accent)}
.start-panel{display:flex;justify-content:space-between;gap:16px;align-items:center;flex-wrap:wrap;border-left:3px solid var(--accent)}
.start-panel h3{margin-bottom:2px}
.start-panel p{color:var(--muted);font-size:.88rem;max-width:520px}

.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:12px}
.cat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--rad-lg);padding:16px;
  text-decoration:none;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:5px;
  transition:border-color .12s, transform .12s;
}
.cat-card:hover{border-color:var(--accent);transform:translateY(-1px)}
.cat-card p{font-size:.8rem;color:var(--muted);flex:1}
.cat-count{font-size:.75rem;font-weight:700;color:var(--dim)}
.cat-ic{
  width:34px;height:34px;border-radius:9px;background:#faf3ec;color:var(--accent);
  display:grid;place-items:center;margin-bottom:4px;
}
.cat-ic .ic{width:19px;height:19px}

.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:12px}
.tool{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--rad-lg);padding:16px;
  text-decoration:none;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:5px;
}
.tool:hover{border-color:var(--accent)}
.tool .ic{width:22px;height:22px}
.ic.gold{color:var(--accent)}
.tool span{font-size:.8rem;color:var(--muted)}
.bonus .btn{margin-top:10px;align-self:flex-start}

/* ---------------- project cards ---------------- */
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.pcard{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--rad-lg);overflow:hidden;
  text-decoration:none;box-shadow:var(--shadow);display:flex;flex-direction:column;
  transition:border-color .12s, transform .12s;
}
.pcard:hover{border-color:var(--accent);transform:translateY(-2px)}
.pcard-thumb{
  background-color:#fff;border-bottom:1px solid var(--line);padding:12px;height:150px;display:grid;place-items:center;
  background-image:linear-gradient(rgba(91,102,116,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(91,102,116,.07) 1px,transparent 1px);
  background-size:14px 14px;overflow:hidden;
}
.pcard-thumb svg{max-height:126px;width:100%;--ink:#3a3e44;--dim:var(--dim);--muted:#9aa0a8;--fill:#efefec;transition:transform .22s ease}
.pcard:hover .pcard-thumb svg{transform:scale(1.03)}
.pcard-body{padding:13px 15px 15px;display:flex;flex-direction:column;gap:4px;flex:1}
.pcard-head{display:flex;justify-content:space-between;gap:8px;align-items:flex-start}
.pcard-head h3{font-size:.95rem}
.pcard-meta,.pcard-dims{font-size:.8rem;color:var(--muted)}
.pcard-wt{font-size:.78rem;color:var(--steel);flex:1}
.pcard .btn{align-self:flex-start;margin-top:8px}
.diff{font-weight:650}
.favbtn{
  background:none;border:none;cursor:pointer;color:#c3c6cb;padding:2px;border-radius:6px;flex-shrink:0;
}
.favbtn .ic{width:19px;height:19px}
.favbtn:hover{color:var(--warn)}
.favbtn.on{color:#e2a51f}
.favbtn.on .ic{fill:#e2a51f;stroke:#e2a51f;animation:favPop .32s cubic-bezier(.3,1.6,.6,1)}
@keyframes favPop{0%{transform:scale(.55)}60%{transform:scale(1.3)}100%{transform:scale(1)}}
.favbtn.big .ic{width:24px;height:24px}

/* ---------------- browse ---------------- */
.filters{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:10px;margin-bottom:12px}
.filters input,.filters select,.variant-bar select,.calc-params input{
  padding:9px 11px;border:1px solid var(--line2);border-radius:9px;background:var(--surface);
  font-size:.88rem;color:var(--ink);width:100%;
}
.filters input:focus,.filters select:focus{outline:2px solid var(--accent);outline-offset:-1px}
.result-count{font-size:.83rem;color:var(--muted);margin-bottom:12px}
.id-hits{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.id-hits a{
  font-size:.8rem;text-decoration:none;background:var(--surface);border:1px solid var(--line);
  border-radius:99px;padding:5px 12px;color:var(--muted);
}
.id-hits a:hover{border-color:var(--accent);color:var(--ink)}
.id-hits code{font-family:var(--mono);color:var(--dim);margin-right:6px}

.empty{
  grid-column:1/-1;text-align:center;padding:52px 20px;background:var(--surface);
  border:1px dashed var(--line2);border-radius:var(--rad-lg);color:var(--muted);
}
.empty .btn{margin-top:14px}
.empty .ic.big{
  width:56px;height:56px;margin-bottom:10px;padding:14px;
  background:var(--bg);border-radius:99px;color:var(--muted);
}
.empty.tall{padding:90px 20px}
.big-404{font-size:3.4rem;font-weight:800;color:var(--line2)}

/* ---------------- project detail ---------------- */
.crumbs{display:flex;align-items:center;gap:6px;font-size:.8rem;color:var(--muted);margin-bottom:14px;flex-wrap:wrap}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--ink)}
.crumbs .ic{width:13px;height:13px}
.proj-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:14px;flex-wrap:wrap}
.proj-meta{display:flex;gap:7px;flex-wrap:wrap;margin-top:9px}
.proj-actions{display:flex;gap:10px;align-items:center}
.variant-bar{padding:14px 18px}
.vb-label{font-size:.8rem;font-weight:700;color:var(--muted);margin-bottom:9px;text-transform:uppercase;letter-spacing:.6px}
.vb-opts{display:flex;gap:12px;flex-wrap:wrap}
.vb-opts label{font-size:.78rem;font-weight:650;color:var(--muted);display:flex;flex-direction:column;gap:4px;min-width:150px;flex:1;max-width:240px}
.proj-grid{display:grid;grid-template-columns:minmax(300px,5fr) 7fr;gap:16px;align-items:start}
.drawing{position:relative;cursor:zoom-in;padding:20px;min-height:280px;display:grid;place-items:center}
.drawing svg{--ink:#33373d;--dim:var(--dim);--muted:#9aa0a8;--fill:#efefec;max-height:420px;width:100%}
.zoom-hint{position:absolute;right:10px;top:10px;background:var(--bg);border:1px solid var(--line)}
.modal{
  position:fixed;inset:0;background:rgba(18,20,24,.8);z-index:100;display:grid;place-items:center;padding:20px;
}
.modal-body{background:#fff;border-radius:var(--rad-lg);padding:26px;max-width:1020px;width:100%;max-height:92vh;overflow:auto}
.modal-body svg{--ink:#33373d;--dim:var(--dim);--muted:#9aa0a8;--fill:#efefec;width:100%;min-height:420px}
.modal-x{position:absolute;top:14px;right:14px;background:#fff}

.tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);margin-bottom:14px;overflow-x:auto;position:relative}
.tab{
  background:none;border:none;border-bottom:2px solid transparent;padding:9px 14px;font-size:.88rem;
  font-weight:650;color:var(--muted);cursor:pointer;white-space:nowrap;
}
.tab:hover{color:var(--ink)}
.tab.on{color:var(--accent)}
.tabs:not(:has(.tab-ind)) .tab.on{border-bottom-color:var(--accent)}
.tab-ind{
  position:absolute;bottom:0;height:2px;background:var(--accent);border-radius:2px;
  transition:left .22s ease,width .22s ease;pointer-events:none;
}
.tabpane{display:none}
.tabpane.on{display:block}
.kv{width:100%;border-collapse:collapse;font-size:.88rem}
.kv th{text-align:left;font-weight:650;color:var(--muted);padding:8px 10px 8px 0;width:44%;border-bottom:1px solid var(--line);vertical-align:top}
.kv td{padding:8px 0;border-bottom:1px solid var(--line)}
.kv .hd th,.kv .hd td{font-size:.72rem;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);font-weight:700}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--rad);margin-bottom:10px}
.cutlist{width:100%;border-collapse:collapse;font-size:.85rem;min-width:560px}
.cutlist th{
  text-align:left;font-size:.7rem;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);
  padding:9px 12px;background:var(--bg);border-bottom:1px solid var(--line);
}
.cutlist td{padding:8px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.cutlist tr:last-child td{border-bottom:none}
.cutlist .num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.notes{padding-left:20px;display:flex;flex-direction:column;gap:9px;font-size:.9rem}

/* ---------------- calculator ---------------- */
.calc-tbl input,.calc-tbl select{
  padding:7px 9px;border:1px solid var(--line2);border-radius:7px;font-size:.85rem;width:100%;min-width:70px;
}
.calc-tbl .num{max-width:95px}
.calc-tbl td{white-space:nowrap}
.c-unit{margin-left:6px}
.calc-params{display:flex;gap:14px;flex-wrap:wrap;margin:14px 0}
.calc-params label{font-size:.78rem;font-weight:650;color:var(--muted);display:flex;flex-direction:column;gap:4px;max-width:170px}
.calc-out{display:flex;flex-direction:column;gap:6px;border-top:1px solid var(--line);padding-top:12px;max-width:440px}
.calc-out div{display:flex;justify-content:space-between;font-size:.9rem}
.calc-out .hl{font-size:1rem;font-weight:750;border-top:1px solid var(--line);padding-top:8px;margin-top:4px}
.calc-out .hl b{color:var(--accent)}
#quotePanel summary{cursor:pointer;font-size:.95rem;padding:2px 0}
.quote-params label{max-width:130px}

/* ---------------- misc pages ---------------- */
.steps-list{display:flex;flex-direction:column;gap:14px;padding-left:0;list-style:none;max-width:680px;margin-bottom:8px}
.steps-list li{background:var(--surface);border:1px solid var(--line);border-radius:var(--rad-lg);padding:15px 18px;box-shadow:var(--shadow)}
.steps-list p{color:var(--muted);font-size:.88rem;margin-top:3px}
.faq{display:flex;flex-direction:column;gap:8px;max-width:760px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:var(--rad);padding:13px 16px}
.faq summary{cursor:pointer;font-weight:650;font-size:.92rem}
.faq p{color:var(--muted);font-size:.88rem;margin-top:9px}
.print-only{display:none}

/* ---------------- view transition ---------------- */
@keyframes viewIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
main.vanim{animation:viewIn .26s ease both}
main.vanim .pcard,main.vanim .cat-card,main.vanim .stat,main.vanim .tool{
  animation:viewIn .3s ease both;animation-delay:calc(var(--i,0)*35ms);
}
@media (prefers-reduced-motion:reduce){
  main.vanim,main.vanim .pcard,main.vanim .cat-card,main.vanim .stat,main.vanim .tool{animation:none}
}

/* ---------------- bottom nav (mobile) ---------------- */
.bottomnav{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:45;
  background:var(--chrome);border-top:1px solid var(--chrome-line);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom));
  grid-template-columns:repeat(5,1fr);
}
.bottomnav a,.bottomnav button{
  display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 2px;
  background:none;border:none;border-radius:10px;text-decoration:none;cursor:pointer;
  color:#8f959d;font-size:.62rem;font-weight:600;letter-spacing:.2px;
}
.bottomnav .ic{width:21px;height:21px}
.bottomnav a.on{color:var(--accent)}
.bottomnav a:active,.bottomnav button:active{color:#fff}

/* ---------------- guided tour ---------------- */
.tour-layer{position:fixed;inset:0;z-index:120}
.tour-ring{
  position:fixed;border-radius:14px;pointer-events:none;
  box-shadow:0 0 0 3px var(--accent),0 0 0 9999px rgba(14,16,20,.62);
  transition:top .38s cubic-bezier(.4,.1,.2,1),left .38s cubic-bezier(.4,.1,.2,1),
             width .38s cubic-bezier(.4,.1,.2,1),height .38s cubic-bezier(.4,.1,.2,1),
             box-shadow .3s ease;
}
.tour-ring.hide{box-shadow:0 0 0 0 var(--accent),0 0 0 9999px rgba(14,16,20,.62)}
.tour-card{
  position:fixed;width:min(350px,calc(100vw - 28px));background:var(--surface);color:var(--ink);
  border-radius:var(--rad-lg);box-shadow:0 8px 40px rgba(10,12,16,.4);overflow:hidden;
  transition:top .38s cubic-bezier(.4,.1,.2,1),left .38s cubic-bezier(.4,.1,.2,1);
}
.tour-slide{padding:20px 22px 16px}
.tour-slide h3{font-size:1.02rem;margin-bottom:6px;padding-right:26px}
.tour-slide p{font-size:.88rem;color:var(--muted);line-height:1.5}
.tour-foot{display:flex;align-items:center;gap:10px;margin-top:16px}
.tour-dots{display:flex;gap:5px;flex:1}
.tour-dots i{width:6px;height:6px;border-radius:99px;background:var(--line2);transition:background .2s,width .2s}
.tour-dots i.on{background:var(--accent);width:16px}
.tour-x{position:absolute;top:10px;right:10px;color:var(--muted)}
.tour-step-n{font-size:.72rem;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--dim);margin-bottom:5px}
@keyframes tourInR{from{opacity:0;transform:translateX(48px)}to{opacity:1;transform:none}}
@keyframes tourInL{from{opacity:0;transform:translateX(-48px)}to{opacity:1;transform:none}}
@keyframes tourOutL{to{opacity:0;transform:translateX(-48px)}}
@keyframes tourOutR{to{opacity:0;transform:translateX(48px)}}
.tour-slide.in-r{animation:tourInR .3s ease both}
.tour-slide.in-l{animation:tourInL .3s ease both}
.tour-slide.out-l{animation:tourOutL .22s ease both;position:absolute;inset:0;pointer-events:none}
.tour-slide.out-r{animation:tourOutR .22s ease both;position:absolute;inset:0;pointer-events:none}
@media (prefers-reduced-motion:reduce){
  .tour-slide.in-r,.tour-slide.in-l,.tour-slide.out-l,.tour-slide.out-r{animation-duration:.01s}
}

/* ---------------- responsive ---------------- */
@media(max-width:1020px){
  .proj-grid{grid-template-columns:1fr}
  .filters{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .sidebar{
    position:fixed;z-index:60;left:0;top:0;transform:translateX(-100%);transition:transform .22s ease;width:260px;
  }
  body.nav-open .sidebar{transform:none;box-shadow:0 0 40px rgba(10,12,16,.5)}
  body.nav-open .backdrop{position:fixed;inset:0;background:rgba(15,17,20,.45);z-index:50}
  .menu-btn{display:inline-flex}
  .bottomnav{display:grid}
  main{padding:16px 14px calc(86px + env(safe-area-inset-bottom))}
  .app-foot{padding-bottom:calc(70px + env(safe-area-inset-bottom))}
  h1{font-size:1.28rem}
  h2{font-size:1.06rem}
  .topbar{padding:8px 10px;gap:8px}
  .top-actions .iconbtn[title="Help"]{display:none}
  .gsearch input,.hs-box input,.filters input,.filters select,.variant-bar select,
  .calc-params input,.calc-tbl input,.calc-tbl select{font-size:16px}
  .btn{padding:12px 18px;min-height:44px}
  .btn-sm{padding:9px 14px;min-height:38px}
  .iconbtn{padding:10px}
  .favbtn{padding:8px}
  .tab{padding:12px 13px}
  .tabs{margin:0 -14px 14px;padding:0 14px;scrollbar-width:none}
  .tabs::-webkit-scrollbar{display:none}
  .stats{gap:8px}
  .stat{padding:12px 14px}
  .stat b{font-size:1.2rem}
  .hero-search{padding:20px 16px;margin-left:-2px;margin-right:-2px}
  .hero-search h2{font-size:1.08rem}
  .panel{padding:15px 14px}
  .variant-bar{padding:13px 14px}
  .vb-opts{gap:10px}
  .vb-opts label{min-width:calc(50% - 5px);max-width:none;flex:1 1 calc(50% - 5px)}
  .proj-actions{width:100%;justify-content:space-between}
  .proj-head{gap:8px}
  .drawing{padding:12px;min-height:220px}
  .drawing svg{max-height:320px}
  .zoom-hint{right:8px;top:8px}
  .modal{padding:10px}
  .modal-body{padding:16px;max-height:88vh}
  .modal-body svg{min-height:300px}
  .modal-x{top:16px;right:16px;background:var(--bg);border:1px solid var(--line)}
  .filters{grid-template-columns:1fr 1fr;gap:8px}
  .filters input{grid-column:1/-1}
  .tbl-wrap{-webkit-overflow-scrolling:touch;margin-left:-2px;margin-right:-2px}
  .cutlist{min-width:520px;font-size:.82rem}
  .calc-params{gap:10px}
  .calc-params label{flex:1 1 calc(50% - 5px);max-width:none}
  .quote-params label{max-width:none}
  .calc-out{max-width:none}
  .cat-grid,.tool-grid{grid-template-columns:1fr 1fr;gap:9px}
  .cat-card,.tool{padding:13px}
  .cat-card p,.tool span{font-size:.76rem}
  .pgrid{grid-template-columns:1fr;gap:12px}
  .pcard-thumb{height:170px}
  .side-foot{padding-bottom:calc(16px + env(safe-area-inset-bottom))}
  .tour-card{
    left:10px!important;right:10px;width:auto;top:auto!important;
    bottom:calc(10px + env(safe-area-inset-bottom));
    box-shadow:0 -6px 40px rgba(10,12,16,.45);
  }
}
@media(max-width:400px){
  .cat-grid,.tool-grid{grid-template-columns:1fr}
  .vb-opts label{flex-basis:100%}
}