/* ============ IO Store — shared design system (SEAS brand) ============ */
:root{
  --brand:#045cb4; --brand-d:#043f7e; --brand-l:#e8f0fb;
  --ink:#111111; --slate:#334155; --muted:#5b6b7d; --line:#d1d9e0;
  --bg:#ffffff; --soft:#f0f5fa; --soft2:#e6edf4;
  --ok:#157f3d; --warn:#b45309; --err:#b3261e;
  --radius:10px; --radius-s:7px;
  --shadow:0 1px 2px rgba(16,32,54,.06), 0 4px 14px rgba(16,32,54,.08);
  --shadow-lg:0 10px 30px rgba(16,32,54,.14);
  --maxw:1180px;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
img{max-width:100%; display:block}
a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2; margin:0 0 .5em; letter-spacing:-.01em; color:var(--ink)}
h1{font-size:clamp(26px,3.4vw,40px); font-weight:700}
h2{font-size:clamp(21px,2.4vw,29px); font-weight:700}
h3{font-size:19px; font-weight:650}
p{margin:0 0 1em}
.muted{color:var(--muted)}
.mono{font-family:var(--mono); font-size:.92em}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* skip link */
.skip{position:absolute;left:8px;top:-48px;z-index:99;background:var(--brand);color:#fff;padding:8px 14px;border-radius:6px;transition:top .15s}
.skip:focus{top:8px; text-decoration:none}

/* ============ header / nav ============ */
.site-header{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(16,32,54,.03)}
.brand-bar{max-width:var(--maxw);margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:11px}
.brand .brand-logo{width:auto;height:44px;display:block;flex:0 0 auto}
.brand .name{font-weight:700;font-size:16px;color:var(--ink);line-height:1.15}
.brand .name small{display:block;font-weight:500;font-size:11.5px;color:var(--muted);letter-spacing:.02em}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:var(--radius-s);font-weight:600;font-size:14.5px;color:var(--slate)}
.nav a:hover{background:var(--soft);text-decoration:none;color:var(--ink)}
.nav a[aria-current="page"]{background:var(--brand-l);color:var(--brand-d)}
.cart-pill{display:inline-flex;align-items:center;gap:7px;background:var(--brand);color:#fff;padding:8px 13px;border-radius:20px;font-weight:700;font-size:14px;box-shadow:var(--shadow)}
.cart-pill:hover{background:var(--brand-d);text-decoration:none}
.cart-pill .n{background:#fff;color:var(--brand-d);border-radius:12px;padding:0 7px;font-size:12.5px;font-weight:800;min-width:20px;text-align:center}

/* ============ layout ============ */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:52px 0}
.section.tight{padding:36px 0}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--brand);background:var(--brand-l);padding:5px 11px;border-radius:20px;margin-bottom:14px}
.lead{font-size:18px;color:var(--slate);max-width:62ch}

/* hero */
.hero{background:radial-gradient(1200px 420px at 80% -10%, #eef4fb 0, #f7fafc 55%, #fff 100%);border-bottom:1px solid var(--line)}
.hero .wrap{padding:60px 20px 56px}
.hero .grid{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center}
.hero h1{margin-bottom:14px}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero-visual{background:linear-gradient(160deg,#0b2a4a,#045cb4);border-radius:16px;padding:22px 20px 20px;color:#dbe8fb;box-shadow:var(--shadow-lg)}
.hero-visual .hero-photo{display:block;width:100%;height:auto;border-radius:12px;margin-bottom:16px;box-shadow:0 10px 28px rgba(0,0,0,.28)}
.hero-visual .chip{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);padding:5px 11px;border-radius:20px;font-size:12px;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.hero-visual ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.hero-visual li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px}
.hero-visual li b{color:#fff}
.dot{width:9px;height:9px;border-radius:50%;background:#7fd1a1;margin-top:7px;flex:0 0 auto}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font:inherit;font-weight:700;font-size:15px;padding:12px 20px;border-radius:var(--radius-s);border:1px solid transparent;cursor:pointer;text-decoration:none;transition:transform .06s, box-shadow .15s, background .15s;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--brand);color:#fff;box-shadow:var(--shadow)}
.btn.primary:hover{background:var(--brand-d)}
.btn.ghost{background:#fff;color:var(--slate);border-color:var(--line)}
.btn.ghost:hover{background:var(--soft);color:var(--ink)}
.btn.small{padding:8px 13px;font-size:13.5px;border-radius:6px}
.btn.block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.success{background:var(--ok);color:#fff}
.btn.success:hover{background:#0f6b32}
:focus-visible{outline:3px solid rgba(4,92,180,.55);outline-offset:2px;border-radius:4px}

/* cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card.pad{padding:22px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}

/* steps */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 18px 18px}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-13px;left:16px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:14px;box-shadow:var(--shadow)}
.step h3{margin:.5em 0 .3em;font-size:16px}
.step p{font-size:14px;margin:0;color:var(--muted)}

/* feature tiles */
.tile{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.tile .ic{width:42px;height:42px;border-radius:10px;background:var(--brand-l);display:grid;place-items:center;margin-bottom:12px}
.tile .ic svg{width:22px;height:22px;stroke:var(--brand-d);fill:none;stroke-width:1.8}
.tile h3{font-size:16.5px;margin-bottom:6px}
.tile p{font-size:14.5px;margin:0;color:var(--muted)}

/* ============ tables / catalog rows ============ */
.cat-group{margin:0 0 30px}
.cat-group > h2{font-size:17px;display:flex;align-items:center;gap:10px;color:var(--slate)}
.cat-group > h2 .count{font-size:12.5px;font-weight:700;color:var(--muted);background:var(--soft);border:1px solid var(--line);padding:2px 9px;border-radius:14px}
.row{display:grid;grid-template-columns:132px 1fr auto;gap:20px;align-items:center;padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;background:#fff;box-shadow:var(--shadow)}
.row .thumb{width:132px;height:110px;flex:0 0 132px;border-radius:8px;overflow:hidden;background:var(--soft);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;padding:6px}
.row .thumb img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;padding:0}
.row .thumb .ph{color:var(--muted);font-size:11px;text-align:center;padding:8px}
.row .meta h3{font-size:16px;margin:0 0 3px}
.row .meta .spec{font-size:13.5px;color:var(--slate);margin-bottom:8px}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:10px}
.tag{font-size:11.5px;font-weight:650;color:var(--slate);background:var(--soft);border:1px solid var(--line);padding:3px 9px;border-radius:20px}
.tag b{color:var(--ink);font-weight:700}
.row .actions{display:flex;flex-direction:column;gap:9px;align-items:stretch;min-width:172px}
.row .price{font-size:21px;font-weight:800;color:var(--ink)}
.row .price small{font-size:12px;color:var(--muted);font-weight:600;display:block}
.addrow{display:flex;gap:8px}
.addrow .qty{width:64px}

/* ============ forms ============ */
label{font-weight:650;font-size:13.5px;color:var(--slate);display:block;margin-bottom:6px}
input,select,textarea{font:inherit;width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:var(--radius-s);background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px rgba(4,92,180,.16)}
textarea{min-height:96px;resize:vertical}
.field{margin-bottom:16px}
.field .hint{font-size:12.5px;color:var(--muted);margin-top:5px}
.field .err{font-size:12.5px;color:var(--err);margin-top:5px;display:none}
.field.invalid .err{display:block}
.field.invalid input,.field.invalid select{border-color:var(--err)}
.qty{width:74px;padding:9px 10px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.three{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}

/* ============ configurator ============ */
.cfg-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.station-nav{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 20px}
.station-nav button{font:inherit;font-weight:650;font-size:13.5px;padding:8px 13px;border-radius:20px;border:1px solid var(--line);background:#fff;color:var(--slate);cursor:pointer;display:inline-flex;gap:7px;align-items:center}
.station-nav button:hover{background:var(--soft)}
.station-nav button.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.station-nav button .done{color:#7fd1a1;font-weight:800}
.station-nav button.active .done{color:#cdeede}
.section-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden}
.section-card .head{display:flex;align-items:center;gap:12px;padding:15px 18px;cursor:pointer;background:var(--soft);border-bottom:1px solid var(--line);user-select:none}
.section-card .head:hover{background:var(--soft2)}
.section-card .head .num{width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:13px;flex:0 0 auto}
.section-card .head h3{margin:0;font-size:16px;flex:1}
.section-card .head .badge{font-size:12px;font-weight:700;color:var(--ok);background:#e7f6ec;border:1px solid #bfe6cc;padding:2px 9px;border-radius:14px;display:none}
.section-card.has-items .head .badge{display:inline-block}
.section-card .body{padding:18px}
.section-card.collapsed .body{display:none}
.item-row{display:grid;grid-template-columns:1fr 150px 76px 118px auto;gap:12px;align-items:center;padding:12px 0;border-bottom:1px dashed var(--line)}
.item-row:last-child{border-bottom:0}
.item-row .nm img{width:64px;height:80px;flex:0 0 64px;object-fit:contain;border:1px solid var(--line);border-radius:6px;padding:4px;background:var(--soft)}
.item-row .nm .t{font-weight:700;font-size:14.5px}
.item-row .nm .s{font-size:12.5px;color:var(--muted)}
.item-row .p{font-weight:800;color:var(--ink);font-size:15px}
.item-row .line{font-weight:800;color:var(--brand-d);font-size:14.5px;min-width:104px}
.add-one{font-size:13.5px}

/* summary */
.sum-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:14px}
.sum-block h3{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.sum-line{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.sum-line:last-child{border-bottom:0}
.sum-line .l{color:var(--slate)}
.totals{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.totals .row{display:flex;justify-content:space-between;padding:5px 0;font-size:14.5px;border:0;margin:0;box-shadow:none;padding-left:0;padding-right:0}
.totals .grand{font-size:20px;font-weight:800;border-top:2px solid var(--line);margin-top:8px;padding-top:12px}

/* ============ cart ============ */
.cart-table{width:100%;border-collapse:collapse}
.cart-table th,.cart-table td{padding:12px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px;vertical-align:middle}
.cart-table th{font-size:12.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);background:var(--soft);font-weight:700}
.cart-table td .t{font-weight:700}
.cart-table td .s{font-size:12.5px;color:var(--muted)}
.cart-table .num{text-align:right;font-variant-numeric:tabular-nums}
.del{font-size:13px;color:var(--err);background:none;border:0;cursor:pointer;font-weight:600;padding:6px 8px;border-radius:6px}
.del:hover{background:#fbeceb;text-decoration:none}
.empty{ text-align:center;padding:48px 20px;color:var(--muted)}
.empty .big{font-size:40px;margin-bottom:10px}

/* ============ software / docs lists ============ */
.dl-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.dl-list li{display:flex;gap:14px;align-items:center;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
.dl-list .fic{width:46px;height:46px;border-radius:10px;background:var(--brand-l);display:grid;place-items:center;flex:0 0 auto}
.dl-list .fic svg{width:24px;height:24px;stroke:var(--brand-d);fill:none;stroke-width:1.7}
.dl-list .tx{flex:1}
.dl-list .tx .t{font-weight:700;font-size:15.5px}
.dl-list .tx .s{font-size:13.5px;color:var(--muted)}
.dl-list .ver{font-family:var(--mono);font-size:12.5px;color:var(--muted);background:var(--soft);border:1px solid var(--line);padding:3px 9px;border-radius:6px}

/* ============ footer ============ */
.engineer-link{display:inline-block;font-size:13px;color:var(--muted);text-decoration:underline;text-underline-offset:3px;margin-top:2px}
.engineer-link:hover{color:var(--brand-d)}
.site-footer{background:#0b1f33;color:#c6d4e6;margin-top:20px}
.site-footer .wrap{padding:44px 20px 30px;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.site-footer h4{color:#fff;font-size:13px;text-transform:uppercase;letter-spacing:.07em;margin:0 0 12px}
.site-footer a{color:#9fc0e8}
.site-footer p{font-size:14px;color:#b6c8de;margin:0 0 8px}
.site-footer .legal{max-width:var(--maxw);margin:0 auto;padding:16px 20px;border-top:1px solid #16334f;font-size:12.5px;color:#9db4d4;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
/* PROVISIONAL — OWNER REVIEW REQUIRED: footer body/legal text lightened conservatively for AA contrast. */
.badge-note{font-size:12.5px;color:var(--muted);background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin-top:14px}

/* ============ toasts ============ */
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#0b1f33;color:#fff;padding:12px 20px;border-radius:10px;box-shadow:var(--shadow-lg);font-weight:600;font-size:14.5px;opacity:0;pointer-events:none;transition:.25s;z-index:60;display:flex;gap:9px;align-items:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast .ok{color:#7fd1a1}

/* ============ responsive ============ */
/* PROVISIONAL — OWNER REVIEW REQUIRED: conservative tablet breakpoint to cut overflow risk on 641–900px. Awaiting visual verification. */
@media (max-width:900px) and (min-width:641px){
  .row{grid-template-columns:1fr;gap:16px}
  .row .thumb{width:100%;height:120px}
  .row .actions{min-width:0;flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:space-between}
  .item-row{grid-template-columns:1fr 1fr;gap:10px}
  .item-row .nm{grid-column:1 / -1}
  .item-row .p,.item-row .line{min-width:0}
  .addrow{flex-wrap:wrap}
  .addrow .qty{width:100%}
  .addrow .btn{flex:1}
}
@media (max-width:900px){
  .hero .grid{grid-template-columns:1fr}
  .hero-visual{order:-1} /* PROVISIONAL — kept as-is (no strong a11y reason to reorder); owner may want CTA first on mobile */
  .grid-3,.grid-4,.steps{grid-template-columns:1fr 1fr}
  .site-footer .wrap{grid-template-columns:1fr}
}
@media (max-width:640px){
  .wrap{padding:0 14px}
  .section{padding:38px 0}
  .brand-bar{padding:12px 14px;gap:10px}
  .nav{order:3;width:100%;margin-left:0;justify-content:flex-start}
  .grid-2,.grid-3,.grid-4,.steps,.two,.three{grid-template-columns:1fr}
  .row{grid-template-columns:1fr;gap:14px}
  .row .thumb{width:100%;height:120px}
  .row .actions{min-width:0;flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:space-between}
  .item-row{grid-template-columns:1fr;gap:8px}
  .item-row .p,.item-row .line{min-width:0}
  .cart-table thead{display:none}
  .cart-table,.cart-table tbody,.cart-table tr,.cart-table td{display:block;width:100%}
  .cart-table tr{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;padding:8px}
  .cart-table td{border:0;padding:6px 4px}
  .cart-table td.num{text-align:left}
}