/* ── Reset & variables ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d1117;
  --panel:     #161b22;
  --card:      #21262d;
  --card2:     #1c2128;
  --border:    #30363d;
  --border2:   #21262d;
  --text:      #e6edf3;
  --muted:     #8b949e;
  --accent:    #2563eb;
  --accent2:   #1d4ed8;
  --danger:    #ef4444;
  --radius:    8px;
  --sidebar-w: 272px;
  --panel-w:   330px;
  --topbar-h:  52px;
}

html, body { height:100%; overflow:hidden;
             font-family:'Inter',system-ui,sans-serif;
             background:var(--bg); color:var(--text); font-size:13px;
             -webkit-font-smoothing:antialiased; }

/* ── Shell layout ────────────────────────────────────────────────────── */
#shell   { display:flex; flex-direction:column; height:100%; }
#content { display:flex; flex:1; overflow:hidden; position:relative; }
#map     { flex:1; position:relative; }

/* ── Top bar ─────────────────────────────────────────────────────────── */
#topbar {
  display:flex; align-items:center; gap:6px;
  height:var(--topbar-h); background:var(--panel);
  border-bottom:1px solid var(--border);
  padding:0 12px; flex-shrink:0; z-index:1000;
}

.logo { display:flex; align-items:center; gap:8px; margin-right:6px; flex-shrink:0; }
.logo-mark {
  width:30px; height:30px; border-radius:7px;
  background:linear-gradient(135deg,#2563eb,#7c3aed);
  display:flex; align-items:center; justify-content:center;
  font-weight:900; font-size:15px; color:#fff; letter-spacing:-1px;
}
.logo-name  { font-weight:800; font-size:15px; letter-spacing:-.4px; }
.logo-name span { color:var(--accent); }

.divider-v { width:1px; height:22px; background:var(--border); flex-shrink:0; }

/* Project name */
#project-name {
  background:transparent; border:1px solid transparent; border-radius:6px;
  color:var(--text); font-size:13px; font-weight:600; padding:4px 8px;
  min-width:140px; max-width:200px; transition:border-color .15s;
}
#project-name:hover  { border-color:var(--border); }
#project-name:focus  { outline:none; border-color:var(--accent); background:var(--card); }

/* Tool buttons */
.tool-group { display:flex; gap:3px; }
.tool-btn {
  display:flex; align-items:center; gap:5px;
  padding:5px 9px; border-radius:var(--radius);
  background:transparent; border:1px solid transparent;
  color:var(--muted); cursor:pointer; font-size:12px; font-weight:500;
  white-space:nowrap; transition:all .13s; user-select:none;
}
.tool-btn:hover  { background:var(--card); color:var(--text); border-color:var(--border); }
.tool-btn.active { background:var(--accent); color:#fff; border-color:var(--accent); }
.tool-btn .tb-icon { font-size:13px; line-height:1; }
.tool-btn.danger:hover { border-color:var(--danger); color:var(--danger); }

.topbar-right { margin-left:auto; display:flex; align-items:center; gap:6px; flex-shrink:0; }
.btn-primary {
  padding:6px 13px; border-radius:var(--radius);
  background:var(--accent); color:#fff; border:none;
  cursor:pointer; font-size:12px; font-weight:600; transition:background .13s;
  white-space:nowrap;
}
.btn-primary:hover { background:var(--accent2); }
.btn-ghost {
  padding:6px 10px; border-radius:var(--radius);
  background:transparent; color:var(--muted); border:1px solid var(--border);
  cursor:pointer; font-size:12px; font-weight:500; transition:all .13s;
}
.btn-ghost:hover { color:var(--text); border-color:var(--text); }

/* Channel selector */
.channel-selector {
  display:flex; align-items:center; gap:6px; flex-shrink:0;
}
.ch-label {
  font-size:10px; font-weight:700; color:var(--muted);
  text-transform:uppercase; letter-spacing:.6px; white-space:nowrap;
}
#channel-select {
  background:var(--card); border:1px solid var(--border); border-radius:6px;
  color:var(--text); font-size:12px; font-weight:500; padding:4px 8px;
  cursor:pointer; outline:none; font-family:inherit;
  transition:border-color .13s;
}
#channel-select:hover  { border-color:var(--accent); }
#channel-select:focus  { border-color:var(--accent); }
#channel-select option { background:var(--panel); }

#mode-hint {
  font-size:11px; color:#60a5fa; font-style:italic;
  margin-left:2px; white-space:nowrap;
}

/* ── Left sidebar ────────────────────────────────────────────────────── */
#sidebar {
  width:var(--sidebar-w); background:var(--panel);
  border-right:1px solid var(--border);
  display:flex; flex-direction:column; z-index:500; flex-shrink:0; overflow-y:auto;
}
#sidebar::-webkit-scrollbar { width:4px; }
#sidebar::-webkit-scrollbar-thumb { background:var(--border); border-radius:2px; }

.sb-section { padding:12px 12px 0; }
.sb-section + .sb-section { border-top:1px solid var(--border2); padding-top:12px; }
.sb-section:last-child { padding-bottom:12px; }
.sec-title {
  font-size:10px; font-weight:700; letter-spacing:.8px;
  color:var(--muted); text-transform:uppercase; margin-bottom:8px;
}

/* Device palette cards */
.device-card {
  display:flex; align-items:center; gap:9px; padding:9px 10px;
  background:var(--card2); border:1px solid var(--border2); border-radius:var(--radius);
  cursor:pointer; margin-bottom:5px; transition:all .13s; user-select:none;
}
.device-card:last-child { margin-bottom:0; }
.device-card:hover       { border-color:var(--border); background:var(--card); }
.device-card.active      { border-color:var(--accent); background:#1a2540; }
.dc-pin { width:30px; height:30px; border-radius:50%; display:flex;
          align-items:center; justify-content:center; flex-shrink:0; }
.dc-pin svg { display:block; }
.dc-info { flex:1; min-width:0; }
.dc-name { font-weight:600; font-size:12px; }
.dc-sub  { font-size:10px; color:var(--muted); margin-top:1px; }

/* Action cards */
.action-card {
  display:flex; align-items:center; gap:9px; padding:9px 10px;
  background:var(--card2); border:1px solid var(--border2); border-radius:var(--radius);
  cursor:pointer; margin-bottom:5px; transition:all .13s; user-select:none;
}
.action-card:last-child  { margin-bottom:0; }
.action-card:hover       { border-color:var(--border); background:var(--card); }
.action-card.active      { border-color:var(--accent); background:#1a2540; }
.action-card.danger:hover{ border-color:var(--danger); color:var(--danger); }
.ac-icon { font-size:15px; width:22px; text-align:center; flex-shrink:0; }

/* Summary grid */
.sum-grid { display:grid; grid-template-columns:1fr 1fr; gap:5px; }
.sum-item { background:var(--card2); border:1px solid var(--border2);
            border-radius:var(--radius); padding:8px 9px; }
.sum-label { font-size:10px; color:var(--muted); text-transform:uppercase; letter-spacing:.4px; }
.sum-val   { font-size:17px; font-weight:700; margin-top:2px; }
.sum-full  { grid-column:1 / -1; }

/* Legend */
.legend-row { display:flex; align-items:center; gap:8px; font-size:11px;
              color:var(--muted); margin-bottom:4px; }
.legend-line { width:24px; height:4px; border-radius:2px; flex-shrink:0; }
.legend-line.dashed { background:transparent; border-top:2px dashed #ef4444; }

.sidebar-footer {
  margin-top:auto; padding:10px 12px;
  border-top:1px solid var(--border2);
  font-size:10px; color:var(--muted); text-align:center; line-height:1.6;
}
.sidebar-footer a { color:var(--accent); text-decoration:none; }
.sidebar-footer a:hover { text-decoration:underline; }

/* ── Map ─────────────────────────────────────────────────────────────── */
.sector-layer { pointer-events:none; }

/* Empty state hint */
#empty-hint {
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  z-index:400; pointer-events:none;
  display:flex; flex-direction:column; align-items:center; gap:10px;
  background:rgba(22,27,34,0.92); border:1px solid var(--border);
  border-radius:14px; padding:28px 36px; backdrop-filter:blur(8px);
  text-align:center;
}
.eh-icon { font-size:36px; line-height:1; }
.eh-title { font-size:15px; font-weight:700; color:var(--text); }
.eh-sub   { font-size:12px; color:var(--muted); max-width:240px; line-height:1.5; }

/* Tile switcher */
#tile-switcher {
  position:absolute; bottom:30px; left:14px; z-index:900; display:flex; gap:4px;
}
.tile-btn {
  padding:5px 11px; border-radius:6px; font-size:11px; font-weight:600;
  background:var(--panel); border:1px solid var(--border); color:var(--muted);
  cursor:pointer; transition:all .13s; backdrop-filter:blur(4px);
}
.tile-btn:hover  { color:var(--text); }
.tile-btn.active { background:var(--accent); color:#fff; border-color:var(--accent); }

/* Keyboard shortcuts badge */
#kb-badge {
  position:absolute; bottom:30px; right:52px; z-index:900;
  font-size:10px; color:var(--muted);
  background:var(--panel); border:1px solid var(--border);
  border-radius:6px; padding:4px 9px; backdrop-filter:blur(4px);
}

/* ── Device markers ──────────────────────────────────────────────────── */
.dev-pin {
  width:36px; height:36px; border-radius:50%;
  border:2.5px solid rgba(255,255,255,.85);
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 3px 12px rgba(0,0,0,.55);
  cursor:pointer; transition:transform .1s, box-shadow .1s;
  position:relative;
}
.dev-pin:hover { transform:scale(1.1); box-shadow:0 4px 16px rgba(0,0,0,.65); }
.dev-pin-label {
  position:absolute; top:38px; left:50%; transform:translateX(-50%);
  background:rgba(13,17,23,.9); color:#fff; font-size:10px; font-weight:600;
  white-space:nowrap; padding:2px 7px; border-radius:4px;
  pointer-events:none; backdrop-filter:blur(6px);
  border:1px solid rgba(255,255,255,.08);
}

/* ── Link labels ─────────────────────────────────────────────────────── */
.link-label {
  display:flex; flex-direction:column; align-items:center;
  background:rgba(13,17,23,.88); border:1px solid var(--border);
  border-radius:5px; padding:3px 8px; pointer-events:none;
  backdrop-filter:blur(6px); white-space:nowrap;
}
.ll-tp   { font-size:11px; font-weight:700; line-height:1.3; }
.ll-dist { font-size:10px; color:var(--muted); line-height:1.2; }

/* ── Right panel ─────────────────────────────────────────────────────── */
#right-panel {
  width:var(--panel-w); background:var(--panel);
  border-left:1px solid var(--border);
  display:flex; flex-direction:column; flex-shrink:0; z-index:500;
  overflow-y:auto;
}
#right-panel.hidden { display:none; }
#right-panel::-webkit-scrollbar { width:4px; }
#right-panel::-webkit-scrollbar-thumb { background:var(--border); border-radius:2px; }

.panel-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:13px 14px 10px; border-bottom:1px solid var(--border); flex-shrink:0;
}
.panel-header h3 { font-size:14px; font-weight:700; }
.panel-close {
  background:none; border:none; color:var(--muted);
  cursor:pointer; font-size:20px; line-height:1; padding:2px 4px;
  border-radius:4px; transition:color .13s;
}
.panel-close:hover { color:var(--text); }

#panel-body { padding:13px; flex:1; overflow-y:auto; }
#panel-body::-webkit-scrollbar { width:4px; }
#panel-body::-webkit-scrollbar-thumb { background:var(--border); border-radius:2px; }

.panel-device-badge {
  display:flex; align-items:center; gap:10px; padding:10px 12px;
  border-radius:var(--radius); margin-bottom:12px;
}
.badge-letter { width:34px; height:34px; border-radius:50%; display:flex;
                align-items:center; justify-content:center; font-weight:800;
                font-size:14px; color:#fff; flex-shrink:0; }
.badge-label  { font-weight:700; font-size:13px; }

.spec-pills { display:flex; flex-wrap:wrap; gap:4px; margin-bottom:12px; }
.spec-pills span {
  font-size:10px; font-weight:600; padding:2px 8px;
  background:var(--card2); border:1px solid var(--border);
  border-radius:20px; color:var(--muted);
}

.field-row { display:flex; flex-direction:column; gap:4px; margin-bottom:11px; }
.field-row label {
  font-size:10px; font-weight:700; color:var(--muted);
  text-transform:uppercase; letter-spacing:.6px;
}
.field-input {
  background:var(--card); border:1px solid var(--border); border-radius:6px;
  color:var(--text); padding:6px 9px; font-size:13px; width:100%;
  font-family:inherit; transition:border-color .13s;
}
.field-input:focus { outline:none; border-color:var(--accent); }

.azimuth-ctrl { display:flex; align-items:center; gap:8px; }
.azimuth-ctrl input[type=range] { flex:1; accent-color:var(--accent); }
#az-val { min-width:34px; text-align:right; font-weight:700; }

.section-label {
  font-size:10px; font-weight:700; color:var(--muted);
  text-transform:uppercase; letter-spacing:.6px; margin:12px 0 7px;
}
.link-row {
  display:flex; align-items:center; gap:8px; padding:8px 9px;
  background:var(--card2); border:1px solid var(--border2); border-radius:var(--radius);
  margin-bottom:4px; cursor:pointer; transition:border-color .13s;
}
.link-row:hover { border-color:var(--accent); }
.link-dot { width:9px; height:9px; border-radius:50%; flex-shrink:0; }
.link-row-info { display:flex; flex-direction:column; gap:1px; min-width:0; }
.link-row-name { font-weight:600; font-size:12px; }

/* Link panel */
.link-endpoints { display:flex; flex-direction:column; gap:5px; margin-bottom:9px; }
.endpoint {
  display:flex; align-items:center; gap:8px; padding:8px 10px;
  background:var(--card2); border-radius:var(--radius);
  font-weight:600; font-size:12px; border-left:3px solid transparent;
}
.ep-dot   { width:9px; height:9px; border-radius:50%; flex-shrink:0; }
.ep-arrow { text-align:center; color:var(--muted); font-size:14px; }
.link-type-label {
  font-size:10px; color:var(--accent); font-weight:700;
  text-transform:uppercase; letter-spacing:.5px; margin-bottom:12px;
}
.link-range-info { margin-bottom:10px; }

.link-ch-badge {
  font-size:10px; font-weight:600; color:var(--accent);
  background:rgba(37,99,235,.1); border:1px solid rgba(37,99,235,.25);
  border-radius:5px; padding:4px 9px; margin-bottom:12px;
  text-align:center; letter-spacing:.2px;
}

.stat-grid { display:grid; grid-template-columns:1fr 1fr; gap:5px; margin-bottom:12px; }
/* 6-card layout stays 2-col, just wraps naturally */
.stat-card {
  background:var(--card2); border:1px solid var(--border2);
  border-radius:var(--radius); padding:10px; text-align:center;
}
.stat-val { font-size:15px; font-weight:700; }
.stat-key { font-size:10px; color:var(--muted); margin-top:2px; text-transform:uppercase; }

.quality-wrap { margin-bottom:10px; }
.quality-header { display:flex; justify-content:space-between;
                  font-size:11px; font-weight:600; margin-bottom:6px; }
.quality-bar-bg   { background:var(--card); border-radius:4px; height:7px; overflow:hidden; }
.quality-bar-fill { height:100%; border-radius:4px; transition:width .3s ease; }

/* ── Right panel wide mode (link selected) ───────────────────────── */
#right-panel.link-mode {
  width: clamp(520px, 46vw, 680px);
}
#right-panel.link-mode #panel-body {
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* 3-column layout inside link panel */
.lp-cols {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}
.lp-left, .lp-right {
  width: 175px;
  flex-shrink: 0;
  padding: 12px 11px;
  overflow-y: auto;
}
.lp-left::-webkit-scrollbar,
.lp-right::-webkit-scrollbar { width: 3px; }
.lp-left::-webkit-scrollbar-thumb,
.lp-right::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.lp-center {
  flex: 1;
  min-width: 0;
  padding: 12px 10px;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 7px;
  overflow-y: auto;
}

/* Device header in link pane */
.lp-dev-header {
  display: flex; align-items: center; gap: 8px;
  padding-bottom: 10px; margin-bottom: 10px;
  border-bottom: 1px solid var(--border2);
}
.lp-dev-icon {
  width: 30px; height: 30px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; border: 2px solid rgba(255,255,255,.18);
}
.lp-dev-name-wrap { min-width: 0; }
.lp-dev-name { font-weight: 700; font-size: 12px;
               white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lp-dev-type { font-size: 10px; color: var(--muted); }

/* Field rows in link pane device columns */
.lp-field { margin-bottom: 9px; }
.lp-label {
  font-size: 9px; font-weight: 700; color: var(--muted);
  text-transform: uppercase; letter-spacing: .6px; margin-bottom: 3px;
}
.lp-val { font-size: 12px; font-weight: 600; }
.lp-val.mono { font-family: 'SF Mono','Consolas',monospace; font-size: 11px; }
.lp-input {
  width: 100%; background: var(--card); border: 1px solid var(--border);
  border-radius: 5px; color: var(--text); padding: 4px 7px;
  font-size: 12px; font-family: inherit; transition: border-color .13s;
}
.lp-input:focus { outline: none; border-color: var(--accent); }

/* Height / tilt +/- spinner */
.hnum-ctrl { display: flex; gap: 4px; align-items: center; }
.hnum-ctrl input {
  flex: 1; min-width: 0; text-align: center;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 5px; color: var(--text); padding: 4px 5px;
  font-size: 12px; font-weight: 600; font-family: inherit;
}
.hnum-ctrl input:focus { outline: none; border-color: var(--accent); }
.hnum-ctrl input::-webkit-inner-spin-button { -webkit-appearance: none; }
.hn-btn {
  width: 22px; height: 22px; border-radius: 4px; flex-shrink: 0;
  background: var(--card2); border: 1px solid var(--border);
  color: var(--muted); cursor: pointer; font-size: 14px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: all .13s; user-select: none;
}
.hn-btn:hover { border-color: var(--accent); color: var(--accent); }

/* MCS signal bar */
.mcs-signal { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border2); }
.mcs-signal-header {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 5px;
}
.mcs-rssi-val { font-size: 15px; font-weight: 800; }
.mcs-rssi-sub { font-size: 9px; color: var(--muted); }
.mcs-bar { display: flex; gap: 2px; height: 8px; margin-bottom: 3px; }
.mcs-seg {
  flex: 1; border-radius: 2px;
  background: var(--card); border: 1px solid var(--border2);
  transition: background .2s;
}
.mcs-seg.lit { border-color: transparent; }
.mcs-labels { display: flex; justify-content: space-between; font-size: 8px; color: var(--muted); }

/* Link center column */
.lp-header-strip {
  background: var(--card2); border: 1px solid var(--border2);
  border-radius: var(--radius); padding: 9px 10px;
}
.lp-link-type {
  font-size: 9px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: .6px;
}
.lp-ch-row {
  display: flex; align-items: center; gap: 6px;
  margin-top: 5px;
}
.lp-ch-label {
  font-size: 9px; font-weight: 700; color: var(--muted);
  text-transform: uppercase; letter-spacing: .5px;
  flex-shrink: 0;
}
.lp-ch-sel {
  flex: 1;
  font-size: 10px; font-weight: 600; color: var(--accent);
  background: var(--card2); border: 1px solid var(--border2);
  border-radius: 5px; padding: 2px 5px;
  cursor: pointer; outline: none;
  appearance: auto;   /* keep native arrow */
}
.lp-ch-sel:hover  { border-color: var(--accent); }
.lp-ch-sel:focus  { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent)22; }
.lp-q-row {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 7px; font-size: 11px; font-weight: 600;
}
.lp-qbar-bg { background: var(--card); border-radius: 3px; height: 5px; margin-top: 4px; overflow: hidden; }
.lp-qbar-fill { height: 100%; border-radius: 3px; transition: width .3s; }

.lp-stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.lp-stat {
  background: var(--card2); border: 1px solid var(--border2);
  border-radius: var(--radius); padding: 9px 7px; text-align: center;
}
.lp-stat-val { font-size: 13px; font-weight: 700; }
.lp-stat-key { font-size: 9px; color: var(--muted); margin-top: 2px; text-transform: uppercase; }

/* Distance bidirectional arrow */
.lp-dist-arrow { display: flex; align-items: center; gap: 8px; padding: 2px 0; }
.lp-arr-line { flex: 1; height: 2px; background: var(--accent); opacity: .5; position: relative; }
.lp-arr-line::before {
  content: '◀'; position: absolute; left: -6px; top: -7px;
  font-size: 10px; color: var(--accent); opacity: .9;
}
.lp-arr-line::after {
  content: '▶'; position: absolute; right: -6px; top: -7px;
  font-size: 10px; color: var(--accent); opacity: .9;
}
.lp-arr-dist { font-size: 14px; font-weight: 800; white-space: nowrap; }

/* Elevation / terrain profile */
.elev-wrap {
  flex: 1; min-height: 220px;
  background: var(--card2); border: 1px solid var(--border2);
  border-radius: var(--radius); overflow: hidden; position: relative;
  display: flex; flex-direction: column;
}
.elev-wrap svg { display: block; width: 100%; flex-shrink: 0; }
.elev-loading {
  display: flex; align-items: center; justify-content: center;
  flex: 1; font-size: 11px; color: var(--muted);
}
.elev-stats {
  display: flex; justify-content: space-between; align-items: center;
  padding: 5px 10px 6px;
  border-top: 1px solid var(--border2);
  background: var(--card2);
  flex-shrink: 0;
}
.elev-stat { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.elev-stat-k { font-size: 9px; color: var(--muted); }
.elev-stat-v { font-size: 10px; font-weight: 600; font-family: 'SF Mono','Consolas',monospace; }
.elev-stat-warn { font-size: 10px; color: #f59e0b; }
.elev-source {
  font-size: 9px; color: var(--muted); text-align: center;
  padding: 2px 0 4px; letter-spacing: .2px;
}
.elev-note {
  position: absolute; bottom: 4px; left: 0; right: 0;
  font-size: 9px; color: var(--muted); text-align: center; pointer-events: none;
}

/* RF budget in center column */
.lp-budget { font-size: 11px; }
.lp-brow {
  display: flex; justify-content: space-between; padding: 4px 0;
  border-bottom: 1px solid var(--border2);
}
.lp-brow:last-child { border-bottom: none; }
.lp-bkey { color: var(--muted); }
.lp-bval { font-weight: 600; font-family: 'SF Mono','Consolas',monospace; font-size: 11px; }
.lp-brow.lp-btotal .lp-bkey,
.lp-brow.lp-btotal .lp-bval { font-weight: 700; color: var(--text); }
.lp-brow.lp-bsep { border-top: 1px solid var(--border); margin-top: 3px; padding-top: 6px; }
/* Ultra gain annotation in budget table */
.lp-ultra-tag  { font-size: 9px; font-weight: 700; color: #3b82f6; background: #3b82f620;
                 border-radius: 3px; padding: 1px 4px; margin-left: 3px; vertical-align: middle; }
.lp-ultra-gain { color: #3b82f6; }

/* ── Link panel tab strip ─────────────────────────────────────────────── */
.lp-tabs {
  display: flex;
  gap: 2px;
  padding: 8px 10px 0;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.lp-tab {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: 5px 5px 0 0;
  background: var(--card2);
  border: 1px solid var(--border2);
  border-bottom: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 11px;
  font-weight: 500;
  font-family: inherit;
  transition: all .13s;
  user-select: none;
  white-space: nowrap;
}
.lp-tab:hover { color: var(--text); background: var(--card); border-color: var(--border); }
.lp-tab.active {
  background: var(--panel);
  color: var(--text);
  border-color: var(--border);
  border-bottom-color: var(--panel);
  position: relative;
  bottom: -1px;
  z-index: 1;
  font-weight: 600;
}
.lp-tab-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Footer delete bar */
.lp-footer {
  padding: 9px 12px; border-top: 1px solid var(--border2); flex-shrink: 0;
  display: flex; gap: 8px; align-items: center;
}
.lp-footer .btn-danger { margin-left: auto; }   /* push delete to right */
.btn-secondary {
  padding: 6px 14px; border-radius: 7px; font-size: 12px; font-weight: 600;
  cursor: pointer; border: 1px solid var(--border2);
  background: var(--card2); color: var(--accent);
  transition: background .15s, border-color .15s;
}
.btn-secondary:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Device mini-card (link panel endpoints) ─────────────────────────── */
.dev-mini {
  display:flex; align-items:center; gap:10px; padding:9px 11px;
  background:var(--card2); border:1px solid var(--border2);
  border-radius:var(--radius);
}
.dm-icon {
  width:34px; height:34px; border-radius:50%; display:flex;
  align-items:center; justify-content:center; flex-shrink:0;
  border:2px solid rgba(255,255,255,.2);
}
.dm-info  { flex:1; min-width:0; }
.dm-name  { font-weight:700; font-size:12px; white-space:nowrap;
            overflow:hidden; text-overflow:ellipsis; }
.dm-sub   { font-size:10px; color:var(--muted); margin-top:1px; }
.dm-coord { font-size:10px; color:var(--muted); margin-top:2px;
            font-family:'SF Mono','Consolas',monospace; letter-spacing:-.2px; }

/* Link distance arrow between the two endpoint cards */
.link-span {
  display:flex; align-items:center; gap:7px; padding:4px 2px;
}
.ls-line  { flex:1; height:1px; background:var(--border); }
.ls-mid   { display:flex; flex-direction:column; align-items:center; gap:1px;
            white-space:nowrap; }
.ls-dist  { font-size:12px; font-weight:700; color:var(--text); }
.ls-type  { font-size:9px; font-weight:700; color:var(--accent);
            text-transform:uppercase; letter-spacing:.5px; }

/* Modulation badge */
.mod-badge {
  text-align:center; font-size:11px; font-weight:600; padding:5px 10px;
  background:var(--card2); border:1px solid var(--border);
  border-radius:20px; color:var(--text); margin-bottom:12px;
  letter-spacing:.2px;
}

/* RF path budget table */
.budget-grid  { margin-bottom:12px; }
.bg-row {
  display:flex; justify-content:space-between; align-items:center;
  padding:5px 0; font-size:11px; border-bottom:1px solid var(--border2);
}
.bg-row:last-child { border-bottom:none; }
.bg-key { color:var(--muted); }
.bg-val { font-weight:600; font-family:'SF Mono','Consolas',monospace; font-size:11px; }
.bg-row.bg-sep  { border-top:1px solid var(--border); margin-top:3px; padding-top:7px; }
.bg-row.bg-total .bg-key { color:var(--text); font-weight:700; }
.bg-row.bg-total .bg-val { color:var(--text); }

/* Panel divider */
.panel-divider { height:1px; background:var(--border2); margin:12px 0; }

/* ── Enhanced link row (device panel) ───────────────────────────────── */
.link-item {
  background:var(--card2); border:1px solid var(--border2);
  border-radius:var(--radius); margin-bottom:5px;
  cursor:pointer; transition:border-color .13s; overflow:hidden;
}
.link-item:hover { border-color:var(--accent); }
.link-item-top {
  display:flex; align-items:center; gap:8px;
  padding:8px 10px; border-bottom:1px solid var(--border2);
}
.lit-dot  { width:9px; height:9px; border-radius:50%; flex-shrink:0; }
.lit-name { font-weight:600; font-size:12px; flex:1; min-width:0;
            white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.lit-type { font-size:10px; color:var(--muted); white-space:nowrap; flex-shrink:0; }
.link-item-stats {
  display:flex; font-size:10px;
}
.lis-cell {
  flex:1; padding:5px 6px; text-align:center;
  border-right:1px solid var(--border2);
  display:flex; flex-direction:column; gap:1px;
}
.lis-cell:last-child { border-right:none; }
.lis-val { font-weight:700; font-size:11px; line-height:1.3; }
.lis-key { color:var(--muted); font-size:9px; text-transform:uppercase; letter-spacing:.3px; }

.warn-box {
  background:rgba(239,68,68,.1); border:1px solid rgba(239,68,68,.3);
  border-radius:var(--radius); padding:8px 10px;
  font-size:11px; color:#fca5a5; margin-bottom:10px;
}
.btn-danger {
  width:100%; padding:8px; border-radius:var(--radius);
  background:transparent; border:1px solid var(--danger); color:var(--danger);
  cursor:pointer; font-size:12px; font-weight:600; margin-top:4px;
  transition:all .13s; font-family:inherit;
}
.btn-danger:hover { background:var(--danger); color:#fff; }

/* ── BOM modal ───────────────────────────────────────────────────────── */
#bom-modal {
  position:fixed; inset:0; background:rgba(0,0,0,.72); z-index:2000;
  display:flex; align-items:center; justify-content:center;
  backdrop-filter:blur(6px);
}
#bom-modal.hidden { display:none; }
.bom-box {
  background:var(--panel); border:1px solid var(--border); border-radius:14px;
  width:580px; max-width:95vw; max-height:82vh;
  display:flex; flex-direction:column;
  box-shadow:0 24px 64px rgba(0,0,0,.7);
}
.bom-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:18px 20px 12px; border-bottom:1px solid var(--border);
}
.bom-header h2 { font-size:16px; font-weight:700; }
.bom-header-actions { display:flex; gap:7px; align-items:center; }
.bom-project-name { font-size:12px; color:var(--muted); padding:0 20px 8px; }
.bom-summary-bar  { font-size:11px; color:var(--muted); padding:0 20px 10px;
                    border-bottom:1px solid var(--border); }
.bom-body  { padding:14px 20px; overflow-y:auto; flex:1; }
.bom-table { width:100%; border-collapse:collapse; }
.bom-table th {
  text-align:left; font-size:10px; font-weight:700; color:var(--muted);
  text-transform:uppercase; letter-spacing:.6px; padding-bottom:8px;
}
.bom-table td { padding:9px 0; border-top:1px solid var(--border2);
                font-size:12px; vertical-align:middle; }
.bom-dot { display:inline-block; width:8px; height:8px; border-radius:50%;
           margin-right:8px; vertical-align:middle; }
.bom-qty { text-align:center; font-weight:700; font-size:15px; }
.mono { font-family:'SF Mono','Consolas',monospace; font-size:11px; }
.bom-footer {
  display:flex; justify-content:space-between; align-items:center;
  padding:11px 20px; border-top:1px solid var(--border);
  font-size:11px; color:var(--muted);
}

/* ── Toast ───────────────────────────────────────────────────────────── */
#toast {
  position:fixed; bottom:72px; left:50%; transform:translateX(-50%);
  background:var(--card); border:1px solid var(--border); border-radius:8px;
  padding:8px 18px; font-size:12px; font-weight:500;
  box-shadow:0 6px 24px rgba(0,0,0,.55); z-index:9000;
  pointer-events:none; white-space:nowrap; color:var(--text);
  animation:fadeIn .2s ease;
}
#toast.hidden { display:none; }
@keyframes fadeIn { from{opacity:0;transform:translateX(-50%) translateY(6px)} to{opacity:1;transform:translateX(-50%) translateY(0)} }

/* ── Utilities ───────────────────────────────────────────────────────── */
.muted  { color:var(--muted); }
.small  { font-size:11px; }
.hidden { display:none !important; }

/* ── Azimuth drag handle (Beam sector tip) ───────────────────────────── */
.az-handle {
  width: 14px; height: 14px; border-radius: 50%;
  background: #f59e0b;
  border: 2.5px solid rgba(255,255,255,.9);
  box-shadow: 0 2px 8px rgba(0,0,0,.55);
  cursor: grab;
}
.az-handle:hover  { transform: scale(1.3); }
.az-handle:active { cursor: grabbing; }

/* Hint label for azimuth control in link panel */
.lp-az-hint {
  font-size: 9px; color: var(--muted); margin-top: 2px; font-style: italic;
}

/* ── Azimuth compass dial (link panel) ───────────────────────────────── */
.az-compass-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  margin-bottom: 9px;
}
.az-compass-wrap .lp-label { align-self: flex-start; width: 100%; }
.az-compass {
  width: 88px; height: 88px;
  cursor: crosshair;
  display: block;
  border-radius: 50%;
  flex-shrink: 0;
}
.az-compass:hover { filter: brightness(1.08); }
.az-compass-wrap .hnum-ctrl { width: 100%; }
.az-compass-wrap .lp-az-hint { text-align: center; }

/* ── Leaflet overrides ───────────────────────────────────────────────── */
.leaflet-control-zoom a {
  background:var(--panel) !important; color:var(--text) !important;
  border-color:var(--border) !important;
}
.leaflet-control-zoom a:hover { background:var(--card) !important; }
.leaflet-control-attribution {
  background:rgba(13,17,23,.75) !important; color:var(--muted) !important;
  font-size:9px !important; backdrop-filter:blur(4px);
}
.leaflet-control-attribution a { color:var(--accent) !important; }

/* ── Print ───────────────────────────────────────────────────────────── */
@media print {
  body, #shell { background:white !important; }
  #shell > *:not(#bom-modal) { display:none !important; }
  #bom-modal { position:static; background:white; backdrop-filter:none; }
  .bom-box   { box-shadow:none; border:none; max-height:none; }
  .bom-header-actions, .bom-footer { display:none; }
  * { color:#111 !important; border-color:#ddd !important; background:white !important; }
  .bom-dot { border:1px solid #999; }
}