:root {
  --bg: #f5f7fa;
  --bg2: #ffffff;
  --bg3: #eef1f5;
  --surface: #ffffff;
  --border: #e2e8f0;
  --border2: #cbd5e1;
  --accent: #2563eb;
  --accent2: #1d4ed8;
  --accent-dim: rgba(37,99,235,0.08);
  --red: #ef4444;
  --amber: #f59e0b;
  --green: #10b981;
  --text: #0f172a;
  --text2: #475569;
  --text3: #94a3b8;
  --mono: 'Space Mono', monospace;
  --sans: 'DM Sans', sans-serif;
  --r: 8px;
  --r2: 12px;
  --r3: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 14px; overflow: hidden; }
#app { height: 100vh; display: flex; flex-direction: column; }

/* ── TOPBAR ── */
.topbar {
  height: 52px; background: #fff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 20px; gap: 12px;
  flex-shrink: 0; box-shadow: var(--shadow);
}
.topbar-logo { font-family: var(--mono); font-size: 14px; font-weight: 700; color: var(--accent); letter-spacing: 0.04em; }
.topbar-logo span { color: var(--text3); font-weight: 400; }
.node-badge {
  display: flex; align-items: center; gap: 6px;
  background: var(--accent-dim); border: 1px solid rgba(37,99,235,0.15);
  border-radius: 99px; padding: 4px 12px;
  font-family: var(--mono); font-size: 11px; color: var(--accent);
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
.dot.warn { background: var(--amber); }
.dot.off  { background: var(--text3); animation: none; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.6;transform:scale(.85)} }
.topbar-spacer { flex: 1; }
.topbar-stat { font-family: var(--mono); font-size: 11px; color: var(--text3); display: flex; align-items: center; gap: 5px; }
.topbar-stat strong { color: var(--text2); }
.topbar-action {
  background: none; border: 1px solid var(--border); border-radius: var(--r);
  padding: 5px 12px; font-size: 12px; color: var(--text2); cursor: pointer;
  transition: all .15s; white-space: nowrap;
}
.topbar-action:hover { border-color: var(--accent); color: var(--accent); }

/* ── LAYOUT ── */
.layout { flex: 1; display: grid; grid-template-columns: 220px 1fr; overflow: hidden; }

/* ── SIDEBAR ── */
.sidebar {
  background: #fff; border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 16px 12px; overflow-y: auto; gap: 2px;
}
.sidebar-section-label {
  font-family: var(--mono); font-size: 10px; color: var(--text3);
  letter-spacing: .1em; text-transform: uppercase; padding: 8px 8px 4px;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--r);
  cursor: pointer; font-size: 13px; color: var(--text2);
  transition: all .15s; border: 1px solid transparent; position: relative;
}
.nav-item:hover { background: var(--bg3); color: var(--text); }
.nav-item.active { background: var(--accent-dim); border-color: rgba(37,99,235,0.15); color: var(--accent); font-weight: 500; }
.nav-icon { font-size: 15px; flex-shrink: 0; width: 20px; text-align: center; }
.nav-badge {
  margin-left: auto; background: var(--accent); color: #fff;
  border-radius: 99px; font-size: 10px; font-family: var(--mono);
  padding: 1px 6px; font-weight: 700;
}
.sidebar-bottom { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--border); }
.sidebar-node-info { font-family: var(--mono); font-size: 10px; color: var(--text3); padding: 4px 8px; line-height: 1.8; }

/* ── MAIN ── */
.main { overflow-y: auto; display: flex; flex-direction: column; background: var(--bg); }
.page { display: none; flex: 1; padding: 24px; flex-direction: column; gap: 20px; min-height: 0; }
.page.active { display: flex; }
.page-header { display: flex; align-items: center; gap: 12px; }
.page-title { font-size: 20px; font-weight: 500; color: var(--text); }
.page-sub { font-size: 13px; color: var(--text3); }

/* ── CARDS ── */
.card { background: #fff; border: 1px solid var(--border); border-radius: var(--r2); padding: 16px; box-shadow: var(--shadow); }
.card-title { font-family: var(--mono); font-size: 10px; color: var(--text3); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 12px; }

/* ── STATS ── */
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--r2); padding: 16px; box-shadow: var(--shadow); }
.stat-val { font-family: var(--mono); font-size: 24px; font-weight: 700; }
.stat-val.blue  { color: var(--accent); }
.stat-val.green { color: var(--green); }
.stat-val.amber { color: var(--amber); }
.stat-val.red   { color: var(--red); }
.stat-lbl { font-size: 11px; color: var(--text3); margin-top: 4px; }

/* ── NETWORK VIZ ── */
#network-canvas { width:100%; height:220px; border-radius:var(--r2); background:#f8fafc; border:1px solid var(--border); display:block; }

/* ── LOG ── */
.log-list { display:flex; flex-direction:column; gap:3px; max-height:160px; overflow-y:auto; }
.log-entry { font-family:var(--mono); font-size:11px; color:var(--text3); }
.log-entry .log-time { margin-right:8px; }
.log-entry .log-ok   { color: var(--green); }
.log-entry .log-info { color: var(--accent); }
.log-entry .log-warn { color: var(--amber); }

/* ── CONNECTION BANNER ── */
.connect-banner {
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
  border: 1px solid rgba(37,99,235,0.15); border-radius: var(--r2);
  padding: 20px 24px; display: flex; align-items: center; gap: 16px;
}
.connect-banner-icon { font-size: 28px; flex-shrink: 0; }
.connect-banner-title { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 4px; }
.connect-banner-sub { font-size: 13px; color: var(--text2); }
.connect-banner input {
  flex: 1; background: #fff; border: 1px solid var(--border); border-radius: var(--r);
  padding: 9px 14px; font-family: var(--mono); font-size: 13px; color: var(--text); outline: none;
  transition: border-color .15s;
}
.connect-banner input:focus { border-color: var(--accent); }

/* ── BUTTONS ── */
.btn { display:inline-flex; align-items:center; gap:6px; padding:8px 16px; border-radius:var(--r); font-size:13px; font-weight:500; cursor:pointer; transition:all .15s; border:none; }
.btn-primary { background:var(--accent); color:#fff; }
.btn-primary:hover { background:var(--accent2); }
.btn-secondary { background:#fff; color:var(--text2); border:1px solid var(--border); }
.btn-secondary:hover { border-color:var(--border2); color:var(--text); }
.btn-danger { background:#fff; color:var(--red); border:1px solid rgba(239,68,68,.2); }
.btn-danger:hover { background:rgba(239,68,68,.05); }
.btn-sm { padding:5px 10px; font-size:12px; }

/* ── FORMS ── */
.form-input {
  width:100%; background:#fff; border:1px solid var(--border); border-radius:var(--r);
  padding:9px 12px; font-size:14px; color:var(--text); outline:none; transition:border-color .15s;
  font-family:var(--sans);
}
.form-input:focus { border-color:var(--accent); }
.form-input::placeholder { color:var(--text3); }
.form-label { font-size:12px; font-weight:500; color:var(--text2); margin-bottom:6px; display:block; }

/* ── CHAT ── */
.chat-wrap { display:flex; flex-direction:column; flex:1; min-height:0; }
.chat-messages { flex:1; overflow-y:auto; display:flex; flex-direction:column; gap:10px; padding:4px 0; scrollbar-width:thin; }
.msg { display:flex; gap:10px; align-items:flex-start; animation:fadeUp .2s ease; }
@keyframes fadeUp { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:none} }
.msg-avatar { width:30px; height:30px; border-radius:var(--r); flex-shrink:0; display:flex; align-items:center; justify-content:center; font-family:var(--mono); font-size:10px; font-weight:700; }
.msg.user .msg-avatar { background:var(--accent-dim); color:var(--accent); border:1px solid rgba(37,99,235,.2); }
.msg.ai   .msg-avatar { background:#f0fdf4; color:var(--green); border:1px solid rgba(16,185,129,.2); }
.msg-body { flex:1; }
.msg-name { font-size:11px; color:var(--text3); margin-bottom:4px; font-family:var(--mono); }
.msg-text { background:#fff; border:1px solid var(--border); border-radius:var(--r2); padding:10px 14px; font-size:13px; line-height:1.6; color:var(--text); box-shadow:var(--shadow); }
.msg.ai .msg-text { border-color:rgba(16,185,129,.15); }
.chat-input-area { padding-top:12px; border-top:1px solid var(--border); display:flex; gap:8px; }
.chat-input { flex:1; background:#fff; border:1px solid var(--border); border-radius:var(--r2); padding:10px 14px; font-family:var(--sans); font-size:13px; color:var(--text); resize:none; outline:none; transition:border-color .15s; min-height:44px; max-height:120px; }
.chat-input:focus { border-color:var(--accent); }
.chat-input::placeholder { color:var(--text3); }
.send-btn { width:44px; height:44px; background:var(--accent); border:none; border-radius:var(--r2); cursor:pointer; display:flex; align-items:center; justify-content:center; color:#fff; transition:all .15s; flex-shrink:0; }
.send-btn:hover { background:var(--accent2); transform:scale(1.03); }
.send-btn:disabled { background:var(--border); cursor:not-allowed; transform:none; }
.send-btn svg { width:16px; height:16px; }
.model-pill { display:inline-flex; align-items:center; gap:4px; background:var(--bg3); border:1px solid var(--border); border-radius:99px; padding:4px 10px; font-family:var(--mono); font-size:11px; color:var(--text2); }

/* ── BROWSER / PAGES ── */
.browser-bar { display:flex; align-items:center; gap:10px; background:#fff; border:1px solid var(--border); border-radius:var(--r); padding:8px 14px; font-family:var(--mono); font-size:12px; color:var(--text3); cursor:pointer; transition:border-color .15s; }
.browser-bar:hover { border-color:var(--accent); }
.feed-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:16px; }
.page-card { background:#fff; border:1px solid var(--border); border-radius:var(--r2); overflow:hidden; cursor:pointer; transition:all .15s; box-shadow:var(--shadow); }
.page-card:hover { border-color:var(--accent); transform:translateY(-2px); box-shadow:0 4px 12px rgba(37,99,235,.1); }
.page-card-header { padding:14px 16px 10px; border-bottom:1px solid var(--border); display:flex; align-items:center; gap:10px; }
.page-card-icon { width:32px; height:32px; border-radius:var(--r); display:flex; align-items:center; justify-content:center; font-size:16px; background:var(--accent-dim); color:var(--accent); flex-shrink:0; }
.page-card-title { font-weight:500; font-size:14px; color:var(--text); }
.page-card-node  { font-size:11px; color:var(--text3); margin-top:2px; }
.page-card-body  { padding:12px 16px; font-size:13px; color:var(--text2); line-height:1.5; }
.page-card-footer { padding:8px 16px; border-top:1px solid var(--border); display:flex; align-items:center; gap:10px; font-size:11px; color:var(--text3); font-family:var(--mono); }
.page-viewer { background:#fff; border:1px solid var(--border); border-radius:var(--r2); flex:1; overflow-y:auto; box-shadow:var(--shadow); }
.page-viewer-topbar { display:flex; align-items:center; gap:8px; padding:10px 16px; border-bottom:1px solid var(--border); background:var(--bg3); }
.page-viewer-url { flex:1; background:#fff; border:1px solid var(--border); border-radius:99px; padding:5px 14px; font-family:var(--mono); font-size:11px; color:var(--text2); display:flex; align-items:center; gap:6px; }
.page-viewer-content { padding:24px; max-width:720px; }

/* ── EDITOR ── */
.editor-toolbar { display:flex; gap:6px; flex-wrap:wrap; padding:8px 10px; background:var(--bg3); border:1px solid var(--border); border-radius:var(--r2); }
.editor-btn { background:#fff; border:1px solid var(--border); border-radius:var(--r); padding:5px 10px; font-size:12px; color:var(--text2); cursor:pointer; transition:all .15s; }
.editor-btn:hover { border-color:var(--accent); color:var(--accent); }
.block-item { display:flex; align-items:flex-start; gap:8px; background:#fff; border:1px solid var(--border); border-radius:var(--r); padding:10px 12px; transition:border-color .15s; }
.block-item:hover { border-color:var(--border2); }
.block-handle { color:var(--text3); cursor:grab; font-size:12px; padding-top:2px; }
.block-input { width:100%; background:transparent; border:none; outline:none; font-family:var(--sans); color:var(--text); resize:none; }
.block-input.heading  { font-size:18px; font-weight:500; }
.block-input.heading2 { font-size:15px; font-weight:500; }
.block-input.text     { font-size:13px; line-height:1.7; color:var(--text2); }
.block-delete { background:none; border:none; color:var(--text3); cursor:pointer; font-size:14px; padding:0 4px; transition:color .15s; }
.block-delete:hover { color:var(--red); }

/* ── WORLDS ── */
.world-viewer-wrap { position:relative; border-radius:var(--r2); overflow:hidden; border:1px solid var(--border); background:#000; flex:1; min-height:320px; }
#world-canvas { width:100%; height:100%; display:block; cursor:grab; }
#world-canvas:active { cursor:grabbing; }
.world-overlay { position:absolute; top:12px; left:12px; display:flex; flex-direction:column; gap:4px; pointer-events:none; }
.world-overlay-name { font-family:var(--mono); font-size:13px; font-weight:700; color:#fff; background:rgba(0,0,0,.5); padding:4px 10px; border-radius:var(--r); }
.world-overlay-type { font-family:var(--mono); font-size:10px; color:rgba(255,255,255,.7); background:rgba(0,0,0,.4); padding:3px 8px; border-radius:var(--r); }
.world-controls { position:absolute; bottom:12px; right:12px; display:flex; gap:6px; }
.world-ctrl-btn { background:rgba(0,0,0,.6); border:1px solid rgba(255,255,255,.2); border-radius:var(--r); padding:6px 12px; font-family:var(--mono); font-size:11px; color:rgba(255,255,255,.8); cursor:pointer; transition:all .15s; }
.world-ctrl-btn:hover { border-color:rgba(255,255,255,.5); color:#fff; }
.worlds-sidebar { display:flex; flex-direction:column; gap:6px; width:190px; flex-shrink:0; }
.world-thumb { background:#fff; border:1px solid var(--border); border-radius:var(--r2); padding:10px 12px; cursor:pointer; transition:all .15s; display:flex; align-items:center; gap:10px; box-shadow:var(--shadow); }
.world-thumb:hover { border-color:var(--border2); }
.world-thumb.active { border-color:var(--accent); background:var(--accent-dim); }
.world-thumb-icon { font-size:18px; flex-shrink:0; }
.world-thumb-name { font-size:13px; font-weight:500; color:var(--text); }
.world-thumb-type { font-size:10px; color:var(--text3); margin-top:2px; }
.world-progress-bar { height:2px; background:var(--border); border-radius:99px; margin-top:4px; overflow:hidden; }
.world-progress-fill { height:100%; background:var(--accent); transition:width .5s; }
.world-new-btn { background:transparent; border:1px dashed var(--border2); border-radius:var(--r2); padding:10px 12px; cursor:pointer; font-size:12px; color:var(--text3); text-align:center; transition:all .15s; }
.world-new-btn:hover { border-color:var(--accent); color:var(--accent); }
.share-badge { display:inline-block; background:var(--accent-dim); color:var(--accent); border:1px solid rgba(37,99,235,.15); border-radius:99px; padding:2px 8px; font-size:10px; }

/* ── IDENTITY ── */
.avatar-display { width:80px; height:80px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:36px; border:2px solid var(--border); cursor:pointer; transition:border-color .2s; }
.avatar-display:hover { border-color:var(--accent); }
.avatar-grid { display:grid; grid-template-columns:repeat(6,1fr); gap:8px; width:100%; }
.avatar-option { width:40px; height:40px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:18px; background:var(--bg3); border:1px solid var(--border); cursor:pointer; transition:all .15s; }
.avatar-option:hover { border-color:var(--accent); transform:scale(1.1); }
.avatar-option.selected { border-color:var(--accent); background:var(--accent-dim); }
.color-grid { display:flex; gap:8px; flex-wrap:wrap; }
.color-dot { width:24px; height:24px; border-radius:50%; cursor:pointer; border:2px solid transparent; transition:all .15s; }
.color-dot:hover { transform:scale(1.2); }
.color-dot.selected { border-color:#fff; box-shadow:0 0 0 2px var(--accent); transform:scale(1.1); }
.save-btn { background:var(--accent); color:#fff; border:none; border-radius:var(--r); padding:9px 20px; font-family:var(--mono); font-size:13px; font-weight:700; cursor:pointer; width:100%; transition:all .15s; }
.save-btn:hover { background:var(--accent2); }

/* ── PEERS ── */
.peer-item { display:flex; align-items:center; gap:8px; background:#fff; border:1px solid var(--border); border-radius:var(--r); padding:8px 10px; }
.peer-dot { width:7px; height:7px; border-radius:50%; flex-shrink:0; }
.peer-dot.online { background:var(--green); }
.peer-dot.away   { background:var(--amber); }
.peer-id  { font-family:var(--mono); font-size:11px; color:var(--text2); flex:1; }
.peer-ms  { font-family:var(--mono); font-size:10px; color:var(--text3); }
.peer-direct { font-size:10px; background:#f0fdf4; color:var(--green); border:1px solid rgba(16,185,129,.2); border-radius:99px; padding:1px 6px; font-family:var(--mono); }

/* ── SEARCH ── */
.search-tag { display:inline-flex; align-items:center; background:#fff; border:1px solid var(--border); border-radius:99px; padding:4px 12px; cursor:pointer; font-size:12px; color:var(--text3); transition:all .15s; }
.search-tag:hover { border-color:var(--accent); color:var(--accent); }
.search-result { background:#fff; border:1px solid var(--border); border-radius:var(--r2); padding:12px 14px; cursor:pointer; transition:border-color .15s; box-shadow:var(--shadow); }
.search-result:hover { border-color:var(--accent); }

/* ── MARKETPLACE ── */
.market-card { background:#fff; border:1px solid var(--border); border-radius:var(--r2); overflow:hidden; transition:all .15s; box-shadow:var(--shadow); }
.market-card:hover { border-color:var(--accent); transform:translateY(-1px); }

/* ── NOTIFICATIONS ── */
.notif-item { display:flex; align-items:flex-start; gap:12px; padding:12px 14px; background:#fff; border:1px solid var(--border); border-radius:var(--r2); box-shadow:var(--shadow); }
.notif-item.unread { background:var(--accent-dim); border-color:rgba(37,99,235,.2); }

/* ── DNS ── */
.dns-address { font-family:var(--mono); font-size:18px; font-weight:700; color:var(--accent); }

/* ── SETTINGS TOGGLE ── */
.toggle { width:36px; height:20px; border-radius:10px; background:var(--border); cursor:pointer; position:relative; transition:background .2s; border:none; }
.toggle.on { background:var(--accent); }
.toggle::after { content:''; position:absolute; width:14px; height:14px; border-radius:50%; background:#fff; top:3px; left:3px; transition:transform .2s; box-shadow:0 1px 2px rgba(0,0,0,.2); }
.toggle.on::after { transform:translateX(16px); }
.setting-row { display:flex; align-items:center; justify-content:space-between; padding:12px 0; border-bottom:1px solid var(--border); }
.setting-row:last-child { border-bottom:none; }
.setting-label { font-size:13px; color:var(--text); font-weight:500; }
.setting-desc  { font-size:11px; color:var(--text3); margin-top:2px; }

/* ── NODE JOIN NOTIFICATION ── */
.node-join-notif { position:fixed; bottom:20px; right:20px; background:#fff; border:1px solid var(--border); border-radius:var(--r2); padding:12px 16px; font-size:13px; color:var(--text); animation:slideIn .3s ease; z-index:9999; display:flex; align-items:center; gap:8px; box-shadow:0 4px 16px rgba(0,0,0,.1); max-width:320px; }
@keyframes slideIn { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:none} }

/* ── PROGRESS BAR ── */
.progress-bar { height:3px; background:var(--border); border-radius:99px; overflow:hidden; }
.progress-fill { height:100%; background:var(--accent); border-radius:99px; transition:width .5s; }

/* ── SCROLLBARS ── */
::-webkit-scrollbar { width:4px; height:4px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--border); border-radius:2px; }

/* ── PEER IDENTITY CARD ── */
.peer-identity-card { display:flex; align-items:center; gap:12px; background:#fff; border:1px solid var(--border); border-radius:var(--r2); padding:10px 14px; transition:border-color .15s; box-shadow:var(--shadow); }
.peer-identity-card:hover { border-color:var(--border2); }
.peer-avatar-sm { width:36px; height:36px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:18px; flex-shrink:0; border:1px solid var(--border); }

/* ── MOBILE RESPONSIVE ── */
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .sidebar.mobile-open { display: flex; position: fixed; inset: 0; z-index: 100; width: 260px; box-shadow: 4px 0 20px rgba(0,0,0,0.15); }
  .mobile-overlay { display: none; }
  .mobile-overlay.show { display: block; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 99; }
  .topbar { padding: 0 12px; }
  .topbar-stat { display: none; }
  .page { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2,1fr); }
  .feed-grid { grid-template-columns: 1fr; }
  .connect-banner { flex-direction: column; }
  .worlds-sidebar { display: none; }

  /* Bottom nav bar for mobile */
  .mobile-nav {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0;
    background: #fff; border-top: 1px solid var(--border);
    padding: 8px 0 max(8px, env(safe-area-inset-bottom));
    z-index: 98; box-shadow: 0 -2px 10px rgba(0,0,0,0.06);
  }
  .mobile-nav-item {
    flex: 1; display: flex; flex-direction: column; align-items: center;
    gap: 3px; padding: 4px; cursor: pointer; -webkit-tap-highlight-color: transparent;
  }
  .mobile-nav-icon { font-size: 20px; }
  .mobile-nav-label { font-size: 10px; color: var(--text3); font-family: var(--mono); }
  .mobile-nav-item.active .mobile-nav-label { color: var(--accent); }
  .main { padding-bottom: 70px; }

  /* Hamburger menu button */
  .mobile-menu-btn {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: var(--r);
    background: none; border: 1px solid var(--border); cursor: pointer;
    font-size: 16px; color: var(--text2);
  }
}

@media (min-width: 769px) {
  .mobile-nav { display: none; }
  .mobile-menu-btn { display: none; }
}

/* ── PWA INSTALL BANNER ── */
.install-banner {
  display: flex; align-items: center; gap: 12px;
  background: var(--accent-dim); border: 1px solid rgba(37,99,235,.2);
  border-radius: var(--r2); padding: 12px 16px; margin-bottom: 8px;
}
.install-banner-text { flex: 1; font-size: 13px; color: var(--text2); }
.install-banner-title { font-weight: 500; color: var(--text); margin-bottom: 2px; }