/* ============================================================
   DeviceHub — Premium design system
   Clean light base · calming slate-blue accent · soft glassmorphism
   ============================================================ */
:root{
  /* Soft, low-glare neutral base — gentle contrast, easy on the eyes */
  --bg:#f2f2f4; --bg-2:#fcfcfd; --surface:#fbfbfc; --surface-2:#f0f0f4;
  --surface-3:#e8e8ee; --border:rgba(28,28,42,.075); --border-2:rgba(28,28,42,.12);
  --text:#2c313c; --text-2:#636875; --text-3:#979ba7;
  --accent:#4a89a8; --accent-2:#73a8bf; --accent-glow:rgba(74,137,168,.18);
  --emerald:#168061; --amber:#9b6b1a; --red:#bd5a54; --blue:#4a89a8; --violet:#718aa2; --slate:#6b7080;
  --hover:rgba(28,28,42,.04); --hover-2:rgba(28,28,42,.075); --chip:rgba(28,28,42,.028);
  --radius:18px; --radius-sm:12px; --radius-lg:24px;
  --shadow:0 5px 18px -12px rgba(28,30,50,.12); --shadow-lg:0 18px 44px -22px rgba(28,30,50,.17);
  --grad:linear-gradient(135deg,var(--accent),var(--accent-2));
  --ease:cubic-bezier(.16,1,.3,1);
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg); color:var(--text); line-height:1.55;
  -webkit-font-smoothing:antialiased; min-height:100vh;
  background-image:
    radial-gradient(1100px 640px at 88% -14%,rgba(74,137,168,.075),transparent 60%),
    radial-gradient(820px 520px at -6% 6%,rgba(115,168,191,.055),transparent 55%);
  background-attachment:fixed;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-weight:700;letter-spacing:-.02em;line-height:1.15}
h1{font-size:clamp(2rem,5vw,3.6rem)} h2{font-size:clamp(1.5rem,3vw,2.2rem)}
.icon{width:1.15em;height:1.15em;flex:none;vertical-align:-.15em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.muted{color:var(--text-2)} .dim{color:var(--text-3)} .accent{color:var(--accent)}
.mono{font-family:"JetBrains Mono",ui-monospace,monospace}
.center{text-align:center}
img{max-width:100%}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;font:inherit;font-weight:600;font-size:.95rem;
  padding:.72rem 1.3rem;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s,border-color .2s;
  white-space:nowrap;color:var(--text);background:var(--surface-2);
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0) scale(.98)}
.btn-primary{background:#111;color:#fff;box-shadow:0 8px 24px -8px rgba(0,0,0,.22)}
.btn-primary:hover{background:#000;box-shadow:0 14px 34px -8px rgba(0,0,0,.3)}
.btn-ghost{background:var(--chip);border-color:var(--border-2)}
.btn-ghost:hover{background:var(--hover)}
.btn-danger{background:rgba(248,113,113,.12);color:var(--red);border-color:rgba(248,113,113,.3)}
.btn-danger:hover{background:rgba(248,113,113,.2)}
.btn-success{background:rgba(52,211,153,.12);color:var(--emerald);border-color:rgba(52,211,153,.3)}
.btn-block{width:100%;justify-content:center}
.btn-lg{padding:.95rem 1.7rem;font-size:1.05rem}
.btn-sm{padding:.5rem .85rem;font-size:.85rem}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ---------- Cards ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);
}
.card-hover{transition:transform .3s var(--ease),border-color .3s,box-shadow .3s}
.card-hover:hover{transform:translateY(-4px);border-color:var(--border-2);box-shadow:var(--shadow-lg)}
.glass{background:rgba(255,255,255,.72);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);border:1px solid var(--border-2)}

/* ---------- Badges ---------- */
.badge{display:inline-flex;align-items:center;gap:.35rem;font-size:.72rem;font-weight:600;
  padding:.28rem .6rem;border-radius:999px;border:1px solid transparent;letter-spacing:.02em}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.badge-emerald{color:var(--emerald);background:rgba(52,211,153,.12);border-color:rgba(52,211,153,.25)}
.badge-amber{color:var(--amber);background:rgba(251,191,36,.12);border-color:rgba(251,191,36,.25)}
.badge-red{color:var(--red);background:rgba(248,113,113,.12);border-color:rgba(248,113,113,.25)}
.badge-blue{color:var(--blue);background:rgba(96,165,250,.12);border-color:rgba(96,165,250,.25)}
.badge-violet{color:var(--violet);background:rgba(167,139,250,.12);border-color:rgba(167,139,250,.25)}
.badge-slate{color:var(--slate);background:rgba(148,163,184,.12);border-color:rgba(148,163,184,.22)}

/* ---------- Forms ---------- */
.field{margin-bottom:1rem}
.label{display:block;font-size:.83rem;font-weight:600;color:var(--text-2);margin-bottom:.4rem}
.input,.select,textarea.input{
  width:100%;font:inherit;font-size:.95rem;color:var(--text);background:var(--bg-2);
  border:1px solid var(--border-2);border-radius:var(--radius-sm);padding:.8rem .95rem;
  transition:border-color .2s,box-shadow .2s;
}
.input:focus,.select:focus,textarea.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-glow)}
.input::placeholder{color:var(--text-3)}
.input-icon{position:relative}
.input-icon .icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--text-3);width:20px;height:20px}
.input-icon .input{padding-left:2.9rem}
.input-lg{padding:1.05rem 1.1rem;font-size:1.1rem}
.input-icon .input-lg{padding-left:3.1rem}
.checkline{display:flex;align-items:center;gap:.6rem;color:var(--text-2);font-size:.9rem;cursor:pointer}
.checkline input{width:18px;height:18px;accent-color:var(--accent)}

/* ---------- Layout helpers ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)} .g4{grid-template-columns:repeat(4,1fr)}
.flex{display:flex} .between{display:flex;justify-content:space-between;align-items:center;gap:1rem}
.items-center{align-items:center} .gap{gap:1rem} .gap-sm{gap:.5rem} .wrap{flex-wrap:wrap}
.stack>*+*{margin-top:.6rem}
.mt{margin-top:1.4rem}.mt2{margin-top:2.4rem}.mb{margin-bottom:1.4rem}
.pill-row{display:flex;gap:.5rem;flex-wrap:wrap}
.divider{height:1px;background:var(--border);margin:1.2rem 0}
.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.78rem;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;color:var(--accent);background:rgba(74,137,168,.1);border:1px solid rgba(74,137,168,.22);
  padding:.35rem .8rem;border-radius:999px}
@media(max-width:900px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:1fr}}
@media(max-width:640px){.g2,.g4{grid-template-columns:1fr}.hide-sm{display:none!important}}

/* ---------- Top nav (public) ---------- */
.nav{position:sticky;top:0;z-index:50;padding:.85rem 0}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:.6rem 1.1rem;border-radius:16px}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.15rem;letter-spacing:-.02em}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--grad);display:grid;place-items:center;color:#fff;box-shadow:0 6px 18px -6px var(--accent-glow)}
.brand-mark .icon{width:20px;height:20px}
.nav-links{display:flex;gap:.3rem;align-items:center}
.nav-links a{padding:.5rem .85rem;border-radius:10px;color:var(--text-2);font-weight:500;font-size:.92rem;transition:color .2s,background .2s}
.nav-links a:hover{color:var(--text);background:var(--hover)}
.nav-toggle{display:none;background:none;border:1px solid var(--border-2);border-radius:10px;padding:.5rem;color:var(--text)}
@media(max-width:860px){
  .nav-links{position:absolute;top:70px;left:16px;right:16px;flex-direction:column;align-items:stretch;
    padding:.6rem;border-radius:16px;display:none}
  .nav-links.open{display:flex}
  .nav-toggle{display:inline-flex}
}

/* ---------- Hero ---------- */
.hero{padding:clamp(3rem,8vw,6rem) 0 3rem}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:1.15rem;color:var(--text-2);max-width:34ch;margin:1.2rem 0 1.8rem}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr;gap:32px}}

/* dashboard preview mock */
.preview{border-radius:var(--radius-lg);padding:20px;position:relative;overflow:hidden}
.preview::before{content:"";position:absolute;inset:0;background:radial-gradient(400px 200px at 70% 0,rgba(74,137,168,.18),transparent)}
.preview-row{display:flex;gap:14px;position:relative}
.mini-card{flex:1;background:var(--surface-2);border:1px solid var(--border);border-radius:14px;padding:14px}
.mini-card .k{font-size:.72rem;color:var(--text-3);font-weight:600}
.mini-card .v{font-size:1.5rem;font-weight:800;margin-top:.2rem}
.mini-row{display:flex;align-items:center;justify-content:space-between;padding:.7rem .2rem;border-top:1px solid var(--border)}

/* ---------- Stats band ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stat{padding:26px 20px;text-align:center}
.stat .n{font-size:2.2rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{color:var(--text-2);font-size:.9rem;margin-top:.3rem}
@media(max-width:640px){.stats{grid-template-columns:repeat(2,1fr)}}

/* ---------- Service cards ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.svc-grid{grid-template-columns:1fr}}
.svc{display:flex;flex-direction:column;height:100%}
.svc-ic{width:48px;height:48px;border-radius:13px;display:grid;place-items:center;background:rgba(74,137,168,.13);
  color:var(--accent);border:1px solid rgba(74,137,168,.25);margin-bottom:14px}
.svc-ic .icon{width:24px;height:24px}
.svc h3{font-size:1.12rem;margin-bottom:.3rem}
.svc .desc{color:var(--text-2);font-size:.9rem;flex:1;margin-bottom:1rem}
.svc-meta{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;margin-bottom:1rem}
.svc-price{font-weight:800;font-size:1.15rem}

/* section heading */
.section{padding:clamp(2.5rem,6vw,4.5rem) 0}
.section-head{max-width:52ch;margin-bottom:2rem}
.section-head p{color:var(--text-2);margin-top:.6rem}

/* ---------- App shell (dashboard/admin) ---------- */
.shell{display:grid;grid-template-columns:262px 1fr;min-height:100vh}
.sidebar{background:var(--bg-2);border-right:1px solid var(--border);padding:1.1rem;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side-brand{padding:.4rem .5rem 1.2rem}
.side-nav{display:flex;flex-direction:column;gap:.15rem;overflow-y:auto;flex:1}
.side-nav a{display:flex;align-items:center;gap:.7rem;padding:.65rem .8rem;border-radius:11px;color:var(--text-2);font-weight:500;font-size:.92rem;transition:.18s}
.side-nav a .icon{width:19px;height:19px}
.side-nav a:hover{background:var(--hover);color:var(--text)}
.side-nav a.active{background:rgba(74,137,168,.14);color:#fff;border:1px solid rgba(74,137,168,.28)}
.side-foot{border-top:1px solid var(--border);padding-top:.8rem;margin-top:.5rem}
.side-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-3);padding:.9rem .8rem .3rem;font-weight:700}
.main{min-width:0;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  padding:.9rem 1.6rem;border-bottom:1px solid var(--border)}
.content{padding:1.6rem;flex:1;max-width:1200px;width:100%}
.page-title{font-size:1.5rem;font-weight:700}
@media(max-width:900px){
  .shell{grid-template-columns:1fr}
  .sidebar{display:none}
  .content{padding:1rem 1rem 5.5rem}
}

/* topbar bits */
.avatar{width:36px;height:36px;border-radius:50%;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:700;font-size:.85rem}
.bell{position:relative;background:var(--chip);border:1px solid var(--border-2);border-radius:11px;padding:.55rem;color:var(--text-2);cursor:pointer}
.bell .dot{position:absolute;top:-5px;right:-5px;background:var(--red);color:#fff;font-size:.65rem;font-weight:700;min-width:18px;height:18px;border-radius:9px;display:grid;place-items:center;padding:0 4px}
.balance-chip{display:inline-flex;align-items:center;gap:.5rem;background:rgba(74,137,168,.1);border:1px solid rgba(74,137,168,.25);
  color:#fff;padding:.5rem .85rem;border-radius:11px;font-weight:700}
.balance-chip .icon{color:var(--accent)}

/* stat tiles */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:900px){.tiles{grid-template-columns:repeat(2,1fr)}}
.tile{padding:18px}
.tile .th{display:flex;align-items:center;gap:.5rem;color:var(--text-2);font-size:.83rem;font-weight:600}
.tile .tv{font-size:2rem;font-weight:800;margin-top:.5rem;letter-spacing:-.02em}
.tile .ti{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:rgba(74,137,168,.12);color:var(--accent)}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}
table.tbl{width:100%;border-collapse:collapse;font-size:.9rem;min-width:640px}
table.tbl th{text-align:left;padding:.85rem 1rem;color:var(--text-3);font-weight:600;font-size:.78rem;
  text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--border);background:var(--bg-2)}
table.tbl td{padding:.85rem 1rem;border-bottom:1px solid var(--border);vertical-align:middle}
table.tbl tr:last-child td{border-bottom:none}
table.tbl tbody tr{transition:background .15s}
table.tbl tbody tr:hover{background:var(--hover)}

/* mobile card list for tables */
.rowcards{display:none}
@media(max-width:760px){
  .table-wrap.responsive{border:none;overflow:visible}
  .table-wrap.responsive table{display:none}
  .rowcards{display:grid;gap:12px}
  .rowcard{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:14px}
  .rowcard .rc{display:flex;justify-content:space-between;gap:1rem;padding:.25rem 0;font-size:.88rem}
  .rowcard .rc .k{color:var(--text-3)}
}

/* timeline */
.timeline{position:relative;padding-left:1.5rem}
.timeline::before{content:"";position:absolute;left:6px;top:4px;bottom:4px;width:2px;background:var(--border-2)}
.tl-item{position:relative;padding:0 0 1.1rem}
.tl-item::before{content:"";position:absolute;left:-1.5rem;top:4px;width:12px;height:12px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px rgba(74,137,168,.18)}
.tl-item .t{font-weight:600}.tl-item .d{color:var(--text-3);font-size:.82rem}

/* empty states */
.empty{text-align:center;padding:3rem 1.5rem;color:var(--text-2)}
.empty .ei{width:56px;height:56px;border-radius:16px;background:var(--surface-2);border:1px solid var(--border);
  display:grid;place-items:center;margin:0 auto 1rem;color:var(--text-3)}
.empty .ei .icon{width:26px;height:26px}

/* flash / toast */
.toasts{position:fixed;top:18px;right:18px;z-index:200;display:flex;flex-direction:column;gap:.6rem;max-width:360px}
.toast{padding:.9rem 1.1rem;border-radius:13px;font-size:.9rem;font-weight:500;box-shadow:var(--shadow-lg);
  border:1px solid var(--border-2);display:flex;gap:.6rem;align-items:flex-start;animation:toastIn .4s var(--ease)}
.toast{background:var(--surface)}
.toast.success{background:#ecfdf5;border-color:rgba(5,150,105,.3);color:#065f46}
.toast.error{background:#fef2f2;border-color:rgba(220,38,38,.3);color:#991b1b}
@keyframes toastIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:none}}

/* modal */
.modal-overlay{position:fixed;inset:0;background:rgba(4,5,8,.7);backdrop-filter:blur(6px);z-index:150;
  display:none;align-items:center;justify-content:center;padding:1rem;animation:fade .2s}
.modal-overlay.open{display:flex}
.modal{width:100%;max-width:460px;animation:pop .35s var(--ease)}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:none}}

/* auth split */
.auth{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.auth-side{background:var(--bg-2);position:relative;overflow:hidden;padding:3rem;display:flex;flex-direction:column;justify-content:space-between}
.auth-side::before{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 400px at 30% 20%,rgba(74,137,168,.22),transparent),
  radial-gradient(500px 400px at 90% 90%,rgba(139,92,246,.18),transparent)}
.auth-side>*{position:relative}
.auth-main{display:flex;align-items:center;justify-content:center;padding:2rem}
.auth-card{width:100%;max-width:410px}
.auth-feat{display:flex;gap:.8rem;align-items:flex-start;margin-top:1.1rem}
.auth-feat .fi{width:36px;height:36px;border-radius:10px;background:var(--chip);display:grid;place-items:center;color:var(--accent);flex:none}
@media(max-width:820px){.auth{grid-template-columns:1fr}.auth-side{display:none}}

/* bottom nav (mobile app feel) */
.botnav{display:none}
@media(max-width:900px){
  .botnav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:60;justify-content:space-around;
    padding:.5rem .3rem calc(.5rem + env(safe-area-inset-bottom));border-top:1px solid var(--border)}
  .botnav a{display:flex;flex-direction:column;align-items:center;gap:.15rem;color:var(--text-3);font-size:.66rem;font-weight:600;padding:.3rem .6rem;border-radius:10px}
  .botnav a.active{color:var(--accent)}
  .botnav a .icon{width:22px;height:22px}
}

/* misc */
.kv{display:flex;justify-content:space-between;padding:.55rem 0;border-bottom:1px solid var(--border);font-size:.92rem}
.kv:last-child{border-bottom:none}.kv .k{color:var(--text-3)}
.copyable{cursor:pointer;transition:color .2s}.copyable:hover{color:var(--accent)}
.qr{background:#fff;padding:10px;border-radius:12px;width:150px;height:150px;display:block;border:1px solid var(--border-2)}
.tabs{display:flex;gap:.3rem;border-bottom:1px solid var(--border);margin-bottom:1.2rem;flex-wrap:wrap}
.tabs a{padding:.6rem .95rem;color:var(--text-2);font-weight:600;font-size:.9rem;border-bottom:2px solid transparent;margin-bottom:-1px}
.tabs a.active{color:var(--text);border-bottom-color:var(--accent)}
.footer{border-top:1px solid var(--border);padding:2.5rem 0;color:var(--text-3);font-size:.88rem;margin-top:3rem}
.bars{display:flex;align-items:flex-end;gap:8px;height:120px}
.bars .bar{flex:1;background:var(--grad);border-radius:6px 6px 0 0;min-height:6px;opacity:.85;transition:height .6s var(--ease)}
.oauth-divider{display:flex;align-items:center;gap:1rem;margin:1.2rem 0;color:var(--text-3);font-size:.82rem}
.oauth-divider::before,.oauth-divider::after{content:"";flex:1;height:1px;background:var(--border)}

/* two-column detail (service page / order page) collapses on mobile */
@media(max-width:860px){
  .grid[style*="1.3fr"],.grid[style*="1.05fr"],.grid[style*="1.5fr"]{grid-template-columns:1fr!important}
  .card[style*="sticky"]{position:static!important}
}