/* Design system: tokens -> base -> components -> layouts */
:root{
  --bg:#f6f7fb; --surface:#fff; --text:#141824; --muted:#5d6577; --border:#e2e5ee;
  --primary:#4f46e5; --primary-600:#4338ca; --primary-50:#eef0ff;
  --ok:#0f7b4b; --ok-bg:#e4f6ec; --warn:#8a5a00; --warn-bg:#fff3d6; --bad:#a51d2d; --bad-bg:#fde8ea; --info-bg:#e6f0ff; --info:#1f4fa3;
  --radius:12px; --shadow:0 1px 2px rgba(20,24,36,.06),0 4px 16px rgba(20,24,36,.05);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.55;font-size:16px;display:flex;flex-direction:column;min-height:100vh}
main{flex:1}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:1.9rem;line-height:1.2;margin:.2em 0 .6em}h2{font-size:1.3rem;margin:1.4em 0 .6em}h3{font-size:1.05rem;margin:.2em 0 .4em}h4{margin:0 0 .5em;font-size:.9rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
p{margin:.4em 0 1em}code{background:#eef0f6;padding:.1em .4em;border-radius:6px;font-size:.88em}
.muted{color:var(--muted)}.center{text-align:center}.prewrap{white-space:pre-wrap}.prose{white-space:pre-wrap;overflow-wrap:anywhere}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 20px}
.narrow{max-width:460px;margin:40px auto}.narrow-wide{max-width:760px}
.section{padding-top:28px;padding-bottom:28px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:10}
:focus-visible{outline:3px solid #a5b4fc;outline-offset:2px}
.row-between{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}

/* header */
.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:5}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text)}.brand:hover{text-decoration:none}
.brand-mark{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--primary);color:#fff}
.nav-links{display:flex;align-items:center;gap:18px}.nav-links a{color:var(--text)}.nav-links a[aria-current=page]{color:var(--primary);font-weight:600}
.nav-links a.btn-primary{color:#fff}
.nav-toggle{display:none;background:none;border:1px solid var(--border);border-radius:8px;padding:6px 10px;font-size:1.1rem;cursor:pointer}
form.inline{display:inline;margin:0}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:10px;border:1px solid transparent;font:inherit;font-weight:600;cursor:pointer;text-decoration:none!important;transition:background .15s}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-600)}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--text)}.btn-ghost:hover{background:#f0f2f8}
.btn-danger{background:var(--bad);color:#fff}
.btn-sm{padding:6px 12px;font-size:.88rem}.btn-block{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn-row{display:flex;gap:8px;flex-wrap:wrap}

/* forms */
.stack>*+*{margin-top:14px}
.field{display:flex;flex-direction:column;gap:5px}
.field label,legend{font-weight:600;font-size:.92rem}
input,select,textarea{font:inherit;padding:10px 12px;border:1px solid #cfd4e2;border-radius:10px;background:#fff;color:var(--text);width:100%}
input[type=checkbox],input[type=radio]{width:auto}
input:disabled{background:#f0f2f6;color:var(--muted)}
.short{max-width:80px}
.hint{color:var(--muted)}.error-text{color:var(--bad);font-size:.88rem}.has-error input,.has-error select,.has-error textarea{border-color:var(--bad)}
.check{display:flex;gap:8px;align-items:flex-start;font-weight:400!important}
fieldset.choice{border:0;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}
fieldset.choice legend{grid-column:1/-1;margin-bottom:6px}
.choice-item{display:flex;gap:10px;border:1px solid var(--border);border-radius:10px;padding:12px;cursor:pointer;background:#fff}
.choice-item small{display:block;color:var(--muted)}
.choice-item:has(input:checked){border-color:var(--primary);background:var(--primary-50)}
.inline-form{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap}.inline-form input{width:auto;min-width:0}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.filters input[type=search]{flex:1;min-width:180px}.filters select{width:auto}

/* cards & alerts */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.pad{padding:24px}.card.pad+.card.pad,.card.pad+h2{margin-top:20px}
.alert{border-radius:10px;padding:12px 16px;margin:16px 0;border:1px solid}
.alert-info{background:var(--info-bg);color:var(--info);border-color:#c5d9fb}.alert-success{background:var(--ok-bg);color:var(--ok);border-color:#b8e6cb}
.alert-warning{background:var(--warn-bg);color:var(--warn);border-color:#f2dca0}.alert-error{background:var(--bad-bg);color:var(--bad);border-color:#f6c2c8}
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.75rem;font-weight:600;text-transform:capitalize}
.badge-ok{background:var(--ok-bg);color:var(--ok)}.badge-warn{background:var(--warn-bg);color:var(--warn)}.badge-bad{background:var(--bad-bg);color:var(--bad)}.badge-muted{background:#eceef5;color:var(--muted)}
.empty{text-align:center;padding:40px 20px;border:2px dashed var(--border);border-radius:var(--radius);background:#fff}
.empty .btn{margin-top:8px}

/* hero, grids */
.hero{background:linear-gradient(135deg,#312e81,#4f46e5 60%,#6366f1);color:#fff;padding:64px 0}
.hero h1{font-size:2.5rem;max-width:720px}.lead{font-size:1.15rem;color:inherit;opacity:.9}
.search-big{display:flex;gap:10px;max-width:560px;margin-top:20px}
.grid{display:grid;gap:18px}.grid-cats{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.grid-products{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}.grid-2{grid-template-columns:1fr 1fr}
.cat-card{padding:20px;color:var(--text)}.cat-card:hover{text-decoration:none;border-color:var(--primary)}
.product-card{overflow:hidden;display:flex;flex-direction:column}
.thumb{height:120px;background:linear-gradient(135deg,#e0e7ff,#f5f3ff);display:grid;place-items:center;color:var(--primary);font-weight:800;letter-spacing:.12em}
.card-body{padding:16px;display:flex;flex-direction:column;gap:4px;flex:1}.card-body h3 a{color:var(--text)}
.card-foot{margin-top:auto;display:flex;justify-content:space-between;gap:8px;align-items:center;padding-top:10px;font-size:.92rem}
.pager{display:flex;gap:16px;justify-content:center;align-items:center;margin:24px 0}
.product-layout{display:grid;grid-template-columns:1fr 340px;gap:28px;align-items:start}
.buy-box{position:sticky;top:84px}
.tiers{list-style:none;margin:0 0 16px;padding:0}.tiers li{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:12px 0;border-bottom:1px solid var(--border)}.tiers small{display:block}.price{font-weight:700;font-size:1.1rem}
.tab-list{display:flex;gap:4px;border-bottom:1px solid var(--border);margin:20px 0 16px;overflow-x:auto}
.tab-list button{background:none;border:0;border-bottom:3px solid transparent;padding:10px 14px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer}
.tab-list button[aria-selected=true]{color:var(--primary);border-color:var(--primary)}
.store-head{display:flex;gap:16px;align-items:center}.avatar{width:64px;height:64px;border-radius:16px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:1.8rem;font-weight:700}
.err-code{font-size:4rem;font-weight:800;color:var(--primary);margin:0}

/* tables */
.table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;font-size:.94rem;display:block;overflow-x:auto}
.table thead,.table tbody{display:table;width:100%}
.table th,.table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}
.table th{background:#f8f9fc;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.table .num{text-align:right}.table tr:last-child td{border-bottom:0}

/* dashboards */
.dash{display:grid;grid-template-columns:220px 1fr;gap:28px;padding-top:28px;padding-bottom:40px}
.dash-side{position:sticky;top:84px;align-self:start}.dash-title{font-weight:700;color:var(--muted);text-transform:uppercase;font-size:.78rem;letter-spacing:.06em;margin:0 0 8px}
.dash-side nav{display:flex;flex-direction:column;gap:2px}
.dash-side nav a{padding:9px 12px;border-radius:9px;color:var(--text)}.dash-side nav a:hover{background:#eceef7;text-decoration:none}
.dash-side nav a[aria-current=page]{background:var(--primary-50);color:var(--primary);font-weight:600}
.dash-main{min-width:0}
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px;margin:16px 0 24px}
.stat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:2px}
.stat span{color:var(--muted);font-size:.85rem}.stat strong{font-size:1.6rem}

/* footer */
.site-footer{background:#fff;border-top:1px solid var(--border);padding:32px 0;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}.footer-grid a{display:block;color:var(--muted);padding:2px 0}

@media (max-width:820px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;align-items:flex-start;padding:16px 20px;gap:12px}
  .nav-links.open{display:flex}
  .product-layout,.dash,.footer-grid,.grid-2{grid-template-columns:1fr}
  .buy-box,.dash-side{position:static}
  .dash-side nav{flex-direction:row;flex-wrap:wrap;gap:6px}.hero h1{font-size:1.9rem}
  fieldset.choice{grid-template-columns:1fr}
}