:root{
  --navy:#0b1f3a;
  --navy2:#132c4f;
  --orange:#ff8a1f;
  --orange2:#e56f00;
  --bg:#f5f7fb;
  --card:#ffffff;
  --text:#172033;
  --muted:#70798a;
  --line:#dfe4ec;
  --soft:#fff4e8;
  --danger:#a61b1b;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.topbar{position:sticky;top:0;z-index:20;background:var(--navy);color:#fff;display:flex;justify-content:space-between;align-items:center;padding:12px 18px;box-shadow:0 3px 14px rgba(0,0,0,.12)}
.brand{font-size:30px;font-weight:900;color:var(--orange)}
.tagline{font-size:12px;color:#d6dfec}
.top-actions{display:flex;gap:14px;align-items:center}
.user-badge{font-weight:800}
.icon-btn{position:relative;border:0;background:transparent;color:#fff;font-size:23px}
.badge-count{position:absolute;right:-8px;top:-8px;background:var(--orange);color:#fff;border-radius:99px;font-size:11px;font-weight:900;min-width:19px;height:19px;display:grid;place-items:center}
main{max-width:1180px;margin:auto;padding:18px 16px 105px}
.view{display:none}
.view.active{display:block}
.hero-panel{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;border-radius:24px;padding:26px;display:flex;gap:18px;justify-content:space-between;align-items:center;margin-bottom:18px;box-shadow:0 12px 30px rgba(11,31,58,.15)}
.hero-panel h1{margin:0 0 8px;font-size:clamp(28px,5vw,48px);max-width:720px;line-height:1.05}
.hero-panel p{margin:0;color:#dce5f1}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;margin-bottom:14px}
.filters{display:grid;grid-template-columns:2fr 2fr 1fr 1fr;gap:10px}
input,textarea,select{width:100%;border:1px solid #ccd4df;border-radius:11px;padding:12px;background:#fff}
textarea{min-height:110px;resize:vertical}
.form-stack{display:grid;gap:10px}
label{font-weight:800;font-size:14px}
.primary,.ghost{border-radius:10px;padding:11px 14px;font-weight:800}
.primary{background:var(--orange);color:#fff;border:1px solid var(--orange)}
.primary:hover{background:var(--orange2)}
.ghost{background:#eef2f7;color:var(--navy);border:1px solid #cad3df}
.actions,.listing-actions{display:flex;gap:8px;flex-wrap:wrap}
.section-title-row{display:flex;justify-content:space-between;align-items:center;gap:12px}
.pill{background:var(--soft);color:var(--orange2);font-weight:900;padding:7px 10px;border-radius:99px}
.listing-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.listing-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 6px 18px rgba(11,31,58,.06)}
.listing-img{width:100%;aspect-ratio:4/3;object-fit:cover;background:#e9edf3}
.listing-body{padding:14px}
.listing-title{margin:0 0 5px;font-size:20px}
.listing-price{font-weight:900;color:var(--orange2);font-size:21px}
.listing-meta,.listing-seller,.muted{color:var(--muted);font-size:13px}
.listing-desc{line-height:1.45}
.notice{background:#f7faff}
.verification-box{background:#f7f9fc;border:1px solid #d7dfeb;padding:14px;border-radius:14px}
.verification-code{background:#fff;border:2px dashed var(--orange);border-radius:10px;padding:12px;margin:10px 0;font-size:18px;color:var(--navy)}
.photo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.photo-grid img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:10px;border:1px solid var(--line)}
.bottom-nav{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);display:flex;z-index:20}
.bottom-nav button{flex:1;border:0;background:#fff;padding:14px;font-weight:800;color:#667085}
.bottom-nav button:hover{color:var(--orange2)}
.hidden{display:none!important}
.chat-heading{font-weight:900;font-size:20px;margin-bottom:10px}
.message-list{display:flex;flex-direction:column;gap:8px;min-height:180px;max-height:360px;overflow:auto;margin-bottom:10px}
.msg{max-width:80%;padding:10px 12px;border-radius:12px;background:#f0f3f7}
.msg.mine{align-self:flex-end;background:#fff0df}
.composer{display:flex;gap:8px}
.composer input{flex:1}
.report-card,.admin-row,.notif-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:10px}
.admin-row{display:flex;justify-content:space-between;gap:12px;align-items:center}
.admin-row .actions{justify-content:flex-end}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.stat span{display:block;color:var(--muted);font-weight:700}
.stat strong{display:block;font-size:28px;color:var(--navy);margin-top:4px}
.danger{color:var(--danger);font-weight:800}
.success{color:#117a43;font-weight:800}
.notif-unread{border-left:5px solid var(--orange)}
@media(max-width:800px){
  .filters,.stats-grid{grid-template-columns:1fr}
  .listing-grid{grid-template-columns:1fr}
  .hero-panel{flex-direction:column;align-items:flex-start}
  .photo-grid{grid-template-columns:repeat(2,1fr)}
  .admin-row{flex-direction:column;align-items:flex-start}
}


/* v3 usability improvements */
.field-group{display:grid;gap:6px}
.field-help{font-size:12px;color:var(--muted);line-height:1.35}
.sell-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:0 0 14px}
.sell-steps div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;display:flex;align-items:center;gap:8px}
.sell-steps strong{width:28px;height:28px;border-radius:50%;background:var(--orange);color:#fff;display:grid;place-items:center}
.sell-steps span{font-weight:800;color:var(--navy);font-size:13px}
#sellForm{max-width:780px}
#sellForm .primary{min-height:46px}
#sellForm input,#sellForm textarea,#sellForm select{font-size:16px}
.listing-card{transition:transform .18s ease, box-shadow .18s ease}
.listing-card:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(11,31,58,.1)}
@media(max-width:600px){
  main{padding-left:12px;padding-right:12px}
  .topbar{padding:10px 12px}
  .brand{font-size:26px}
  .tagline{display:none}
  .sell-steps{grid-template-columns:repeat(2,1fr)}
  .bottom-nav button{font-size:12px;padding:12px 4px}
  .section-title-row{align-items:flex-start}
}

/* v4 OSM location experience */
.location-filter,.location-search-row{display:flex;gap:8px;align-items:center}
.location-filter input,.location-search-row input{flex:1}
.mini-btn{min-width:42px;height:42px;border-radius:10px;border:1px solid #cad3df;background:#fff;color:var(--navy);font-size:22px;font-weight:900}
.near-controls{display:flex;gap:8px;align-items:center}
.near-controls select{width:auto;min-width:145px}
.geo-status{background:#eef4fb;color:var(--navy);border:1px solid #cfdaea;border-radius:12px;padding:10px 12px;margin:-4px 0 14px}
.location-results{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.location-result{padding:11px 12px;border-bottom:1px solid var(--line);cursor:pointer}
.location-result:last-child{border-bottom:0}
.location-result:hover{background:#fff6ed}
.location-result strong{display:block;color:var(--navy)}
.selected-location{background:#eef7f1;border:1px solid #cfe3d4;border-radius:12px;padding:11px 12px}
.distance-chip{display:inline-block;margin-top:6px;background:#eef4fb;color:var(--navy);border-radius:99px;padding:4px 8px;font-weight:800;font-size:12px}
.osm-link{display:inline-block;margin-top:7px;color:var(--navy);font-size:12px;font-weight:800;text-decoration:none}
@media(max-width:600px){
  .near-controls{width:100%;align-items:stretch}
  .near-controls select,.near-controls button{flex:1;min-width:0}
  .location-search-row{align-items:stretch}
  .location-search-row .ghost{white-space:nowrap}
}

/* v6 authentication + messaging */
.account-summary{display:flex;align-items:center;gap:12px;margin-bottom:4px}
.avatar-circle{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;font-weight:900;font-size:20px}
.account-summary h2{margin:0 0 3px}
.chat-workspace{display:grid;grid-template-columns:340px 1fr;gap:14px;align-items:start}
.chat-sidebar{position:sticky;top:86px;max-height:72vh;overflow:auto}
.chat-main{min-height:420px}
.chat-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin-bottom:12px}
.chat-tab{border:1px solid var(--line);background:#f4f6f9;color:var(--navy);border-radius:9px;padding:8px 5px;font-size:12px;font-weight:800}
.chat-tab.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.chat-item{width:100%;text-align:left;background:#fff;border:1px solid var(--line);border-radius:12px;padding:11px;margin-bottom:8px}
.chat-item.active{border:2px solid var(--orange);background:#fff8f1}
.chat-item-title{display:flex;justify-content:space-between;gap:8px;font-weight:900;color:var(--navy)}
.chat-item-meta{font-size:12px;color:var(--muted);margin-top:4px}
.chat-item-preview{font-size:13px;margin-top:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-item-badge{font-size:10px;border-radius:99px;background:#eef2f7;padding:3px 6px;white-space:nowrap}
.chat-empty{min-height:350px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted);gap:7px}
.chat-empty strong{color:var(--navy);font-size:20px}
.seller-group{margin-bottom:14px}
.seller-group-title{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);font-weight:900;margin:10px 3px 7px}
@media(max-width:780px){
  .chat-workspace{grid-template-columns:1fr}
  .chat-sidebar{position:static;max-height:none}
  .chat-main{min-height:320px}
}

/* v7 shareable listing URLs */
.detail-back{margin-bottom:12px}
.item-detail-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;max-width:850px;margin:auto;box-shadow:0 8px 28px rgba(11,31,58,.08)}
.item-detail-image{width:100%;max-height:520px;object-fit:cover;background:#edf1f5}
.item-detail-body{padding:20px}
.item-detail-body h1{margin:0 0 8px;color:var(--navy)}
.item-detail-price{font-size:26px;font-weight:900;color:var(--orange2);margin-bottom:8px}
.item-url-box{display:flex;gap:8px;margin-top:14px}
.item-url-box input{font-size:13px;background:#f7f9fc}
@media(max-width:600px){
  .item-detail-body{padding:15px}
  .item-url-box{flex-direction:column}
}

/* v8 friendlier visual system */
:root{
  --navy:#17324d;
  --navy2:#234867;
  --orange:#ff9a3d;
  --orange2:#f27d19;
  --cream:#fff9f2;
  --mint:#eef8f1;
  --sky:#eef6fb;
  --line:#e8e2da;
  --muted:#6f7b86;
  --text:#263746;
}
body{
  background:linear-gradient(180deg,#fffdf9 0,#f8fbfd 48%,#fffdf9 100%);
  color:var(--text);
}
header{
  background:rgba(255,255,255,.96);
  border-bottom:1px solid #efe8df;
  box-shadow:0 3px 16px rgba(30,50,70,.05);
  backdrop-filter:blur(12px);
}
.brand{
  display:flex;align-items:center;gap:9px;
  font-weight:900;font-size:24px;color:var(--navy);
  letter-spacing:-.02em;
}
.brand-mark{
  width:34px;height:34px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--orange),#ffc36d);
  color:#fff;font-size:19px;
  box-shadow:0 5px 14px rgba(242,125,25,.22);
}
nav button{
  border-radius:999px!important;
}
.card{
  border-radius:18px!important;
  border:1px solid #eee7df!important;
  box-shadow:0 6px 22px rgba(30,50,70,.045)!important;
}
.primary{
  border-radius:12px!important;
  box-shadow:0 4px 12px rgba(242,125,25,.14);
}
.primary.warm{
  background:linear-gradient(135deg,var(--orange),var(--orange2));
  color:#fff;
  border:none;
}
.ghost.soft{
  background:#fff7ee;
  border-color:#ffd9b5;
  color:#9a5417;
}
input,select,textarea{
  border-radius:12px!important;
  border-color:#dfe4e8!important;
  background:#fff;
}
input:focus,select:focus,textarea:focus{
  outline:none;
  border-color:#ffb46e!important;
  box-shadow:0 0 0 3px rgba(255,154,61,.12);
}
.home-hero{
  display:grid;
  grid-template-columns:1.6fr .8fr;
  gap:18px;
  margin:6px 0 22px;
  padding:24px;
  border-radius:24px;
  background:
    radial-gradient(circle at 90% 10%,rgba(255,193,110,.38),transparent 28%),
    linear-gradient(135deg,#fff4e8,#f2f9ff);
  border:1px solid #f1e4d6;
}
.hero-copy h1{
  font-size:clamp(30px,5vw,48px);
  line-height:1.02;
  margin:7px 0 12px;
  max-width:720px;
  letter-spacing:-.035em;
  color:var(--navy);
}
.hero-copy p{
  max-width:650px;
  font-size:17px;
  color:#5f6d77;
  margin-bottom:17px;
}
.eyebrow{
  display:inline-block;
  background:#fff;
  border:1px solid #f1dbc6;
  border-radius:999px;
  padding:6px 10px;
  font-weight:800;
  font-size:12px;
  color:#98551d;
}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.hero-bubble{
  align-self:stretch;
  background:rgba(255,255,255,.84);
  border:1px solid rgba(255,255,255,.9);
  border-radius:20px;
  padding:18px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:flex-start;
  gap:5px;
}
.hero-bubble .bubble-icon{font-size:34px}
.hero-bubble strong{color:var(--navy);font-size:18px}
.hero-bubble span{color:var(--muted);font-size:13px}
.quick-categories{
  display:flex;
  gap:8px;
  overflow:auto;
  padding:2px 0 13px;
  scrollbar-width:none;
}
.quick-categories::-webkit-scrollbar{display:none}
.quick-categories button{
  flex:0 0 auto;
  border:1px solid #eadfd5;
  background:#fff;
  color:var(--navy);
  border-radius:999px;
  padding:9px 13px;
  font-weight:800;
}
.quick-categories button.active{
  background:#fff1e3;
  color:#a75b18;
  border-color:#ffc892;
}
.listing-card{
  border-radius:18px!important;
  overflow:hidden;
  transition:transform .15s ease,box-shadow .15s ease;
}
.listing-card:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(30,50,70,.09)!important;
}
.listing-img{
  aspect-ratio:4/3;
  object-fit:cover;
}
.listing-title{
  font-size:17px!important;
}
.listing-price{
  color:#d86f12!important;
}
.step-strip{
  background:#fffaf5!important;
  border-color:#f0dfcf!important;
  border-radius:16px!important;
}
.step-strip span{
  border-radius:999px!important;
}
.chat-item{
  border-radius:14px!important;
}
.chat-tab{
  border-radius:999px!important;
}
.notification-item,.admin-row{
  border-radius:14px!important;
}
.pill{
  background:#f1f6f9!important;
  color:var(--navy)!important;
}
.section-title-row h1,.section-title-row h2{
  color:var(--navy);
  letter-spacing:-.02em;
}
.muted{
  color:#72808a!important;
}
footer{
  color:#7d8790;
}
@media(max-width:800px){
  .home-hero{grid-template-columns:1fr;padding:18px}
  .hero-bubble{display:none}
}
@media(max-width:520px){
  .home-hero{border-radius:18px}
  .hero-copy h1{font-size:34px}
  .hero-copy p{font-size:15px}
  .hero-actions .primary,.hero-actions .ghost{flex:1}
}

/* v9 AI-ready experience */
.header-logo{width:112px;height:44px;object-fit:contain;object-position:left center}
.brand-fallback{display:none}
.ai-search-card,.ai-assistant-box,.ai-safety-box,.ai-admin-card{
  background:linear-gradient(135deg,#fffaf4,#f5faff);
  border:1px solid #eadfd2!important;
}
.ai-search-card{display:grid;grid-template-columns:auto 1fr;gap:10px 16px;align-items:center;margin-bottom:14px}
.ai-search-card .ai-search-row,.ai-search-card .ai-summary{grid-column:1/-1}
.ai-label{
  display:inline-flex;align-items:center;width:max-content;
  font-size:11px;font-weight:900;letter-spacing:.03em;text-transform:uppercase;
  background:#fff1e2;color:#a65a18;border:1px solid #ffd3a7;
  border-radius:999px;padding:5px 8px;
}
.ai-search-row{display:flex;gap:8px}
.ai-search-row input{flex:1}
.ai-summary{
  padding:10px 12px;border-radius:12px;background:#fff;
  border:1px solid #e7e9ec;color:#52616d;font-size:13px
}
.ai-assistant-box{
  border-radius:16px;padding:14px;margin-bottom:3px
}
.ai-assistant-box h3{margin:7px 0 3px;color:var(--navy)}
.price-guidance{
  border-radius:12px;padding:10px 12px;background:#f0f8f3;
  border:1px solid #d4eadb;color:#3c6350;font-size:13px
}
.ai-safety-box{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  border-radius:14px;padding:12px
}
.ai-safety-box #aiSafetyResult{flex:1;min-width:180px}
.safety-good{color:#2e6a46!important;font-weight:800}
.safety-watch{color:#9a6516!important;font-weight:800}
.safety-risk{color:#a53b32!important;font-weight:800}
.smart-replies{display:flex;gap:6px;flex-wrap:wrap;margin:9px 0}
.smart-replies button{
  border:1px solid #dfe5e9;background:#fff;border-radius:999px;
  padding:7px 10px;color:var(--navy);font-size:12px;font-weight:800
}
.chat-safety-notice{
  background:#fff6e7;border:1px solid #f2d29d;color:#76531f;
  border-radius:10px;padding:8px 10px;margin:8px 0;font-size:12px
}
.ai-risk-row{
  display:flex;justify-content:space-between;gap:10px;align-items:center;
  padding:10px 0;border-bottom:1px solid var(--line)
}
.ai-risk-row:last-child{border-bottom:0}
.risk-pill{
  border-radius:999px;padding:4px 8px;font-weight:900;font-size:11px
}
.risk-low{background:#edf8f0;color:#39704a}
.risk-medium{background:#fff4df;color:#8b631d}
.risk-high{background:#fdebea;color:#9b3a34}
@media(max-width:650px){
  .ai-search-card{grid-template-columns:1fr}
  .ai-search-row{flex-direction:column}
  .header-logo{width:92px;height:38px}
}