/* ════════════════════════════════════════════════════════════════════
   LoRa·PER·Survey — Clean professional dashboard
   Sidebar (left) for files / config / channels / export.
   Main area with sticky tab bar for analysis views.
   Onest sans + JetBrains Mono · deep teal accent · light mode.
   ════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Onest:wght@300..800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Surfaces */
  --bg:           #f6f5f1;
  --sidebar:      #ffffff;
  --main:         #fafaf7;
  --surface:      #ffffff;
  --surface-2:    #f3f2ee;
  --surface-3:    #ebeae5;

  /* Text */
  --text:         #18181b;
  --text-2:       #3f3f46;
  --text-3:       #71717a;
  --text-4:       #a1a1aa;
  --text-5:       #d4d4d8;

  /* Borders */
  --border:       #e7e5e0;
  --border-2:     #d6d3cc;

  /* Accent — deep teal */
  --accent:       #0d7d8a;
  --accent-2:     #0a6470;
  --accent-soft:  #e0f2f4;
  --accent-tint:  #f0f9fa;

  /* Status */
  --success:      #15803d;
  --success-soft: #dcfce7;
  --warning:      #b45309;
  --warning-soft: #fef3c7;
  --error:        #b91c1c;
  --error-soft:   #fee2e2;

  /* Fonts */
  --sans:         'Onest', 'Helvetica Neue', system-ui, sans-serif;
  --mono:         'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

  /* Sizes */
  --topbar-h:     54px;
  --sidebar-w:    300px;
  --tabbar-h:     46px;
  --radius:       6px;
  --radius-sm:    4px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'cv11', 'ss01';
}

::selection { background: var(--accent); color: white; }

button { font-family: inherit; cursor: pointer; }
input  { font-family: inherit; }

/* ════════════════════════════════════════════════════════════════════
   APP SHELL
   ════════════════════════════════════════════════════════════════════ */
.app {
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
  height: 100vh;
}

/* ════════════════════════════════════════════════════════════════════
   TOP BAR
   ════════════════════════════════════════════════════════════════════ */
.topbar {
  grid-area: topbar;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 20px;
  z-index: 20;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--text);
}
.brand-mark {
  width: 26px; height: 26px;
  background: var(--accent);
  border-radius: 5px;
  display: grid; place-items: center;
  position: relative;
}
.brand-mark::before {
  content: ''; position: absolute;
  width: 8px; height: 8px;
  border: 1.5px solid white;
  border-radius: 50%;
}
.brand-mark::after {
  content: ''; position: absolute;
  width: 2px; height: 2px;
  background: white;
  border-radius: 50%;
}
.brand .sep { color: var(--accent); margin: 0 1px; }

.topbar-divider {
  width: 1px; height: 22px;
  background: var(--border);
}

.topbar-meta {
  display: flex; gap: 24px;
  font-size: 12px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.topbar-meta .field { display: flex; align-items: baseline; gap: 6px; }
.topbar-meta .field-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-4);
  font-weight: 500;
}
.topbar-meta .field-value {
  font-family: var(--mono);
  color: var(--text);
  font-weight: 500;
  font-size: 12px;
}

.topbar-spacer { flex: 1; }

.topbar-status {
  display: flex; align-items: center; gap: 8px;
  font-size: 11.5px;
  color: var(--text-3);
}
.topbar-status .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-4);
}
.topbar-status.live .dot {
  background: var(--success);
  box-shadow: 0 0 0 3px var(--success-soft);
}
.topbar-status.alarm .dot {
  background: var(--error);
  box-shadow: 0 0 0 3px var(--error-soft);
}

/* ════════════════════════════════════════════════════════════════════
   SIDEBAR
   ════════════════════════════════════════════════════════════════════ */
.sidebar {
  grid-area: sidebar;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  overflow: hidden;
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 0;
}

.sb-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  position: relative;
  flex-shrink: 0;
}
#sb-channels {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}
.sb-section:last-of-type { border-bottom: none; padding-bottom: 0; }

.sb-label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
}
.sb-label .count {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-4);
  letter-spacing: 0;
  text-transform: none;
  font-variant-numeric: tabular-nums;
}

/* ── Compact "Browse" button ────────────────────────────────── */
.btn-add {
  display: flex; align-items: center; justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 9px 12px;
  background: var(--accent-tint);
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: var(--radius-sm);
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
  letter-spacing: -0.005em;
}
.btn-add:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.btn-add .plus {
  font-size: 16px;
  font-weight: 400;
  line-height: 1;
}
.add-hint {
  font-size: 10.5px;
  color: var(--text-3);
  text-align: center;
  font-style: italic;
}

/* ── File list ──────────────────────────────────────────────── */
.file-list {
  display: flex; flex-direction: column; gap: 4px;
}
.file-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 9px;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all 0.12s;
}
.file-item:hover {
  background: var(--surface-3);
  border-color: var(--border);
}
.file-item .fi-name {
  font-family: var(--mono);
  font-size: 10.5px;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-2);
}
.file-item .fi-count {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.sb-action-row {
  display: flex; gap: 6px;
}

/* ── Field (label + input) ──────────────────────────────────── */
.field {
  display: flex; flex-direction: column; gap: 5px;
}
.field-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
  display: flex; justify-content: space-between; align-items: center;
}
.field-hint {
  font-size: 10.5px;
  color: var(--text-3);
  font-weight: 400;
  font-family: var(--mono);
}
.field-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  outline: none;
  transition: border-color 0.12s, box-shadow 0.12s;
  font-variant-numeric: tabular-nums;
  width: 100%;
}
.field-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ── Switch row ─────────────────────────────────────────────── */
.switch-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 0;
}
.switch-row .lbl {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
}
.switch {
  width: 32px; height: 18px;
  background: var(--border-2);
  border-radius: 9px;
  position: relative;
  transition: background 0.18s;
  cursor: pointer;
  flex-shrink: 0;
  display: inline-block;
}
.switch::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 1px 2px rgba(0,0,0,0.18);
  transition: left 0.18s;
}
.switch-row input { display: none; }
.switch-row input:checked + .switch { background: var(--accent); }
.switch-row input:checked + .switch::after { left: 16px; }

.dev-search {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 400;
  padding: 6px 10px;
}
.dev-search::-webkit-search-cancel-button { cursor: pointer; }

/* ── Dev address pills (sidebar) ────────────────────────────── */
.channels-stack {
  display: flex; flex-direction: column; gap: 4px;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: 4px;
  /* Firefox */
  scrollbar-width: thin;
  scrollbar-color: var(--border-2) transparent;
}
.channels-stack::-webkit-scrollbar { width: 6px; }
.channels-stack::-webkit-scrollbar-track { background: transparent; }
.channels-stack::-webkit-scrollbar-thumb {
  background: var(--border-2);
  border-radius: 3px;
}
.channels-stack::-webkit-scrollbar-thumb:hover { background: var(--text-4); }
.dev-pill {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.12s;
  text-align: left;
  width: 100%;
}
.dev-pill::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
  opacity: 0.5;
}
.dev-pill .label-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.dev-pill .nick {
  font-family: var(--sans);
  font-size: 11px;
  color: var(--text-3);
  font-style: normal;
}
.dev-pill .ren {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  color: var(--text-3);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.12s;
}
.dev-pill .ren svg {
  display: block;
  width: 11px; height: 11px;
}
.dev-pill .ren:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-tint);
}
.dev-pill.active .ren {
  color: var(--text-2);
}
.dev-pill:hover {
  border-color: var(--border-2);
  background: var(--surface-2);
  color: var(--text);
}
.dev-pill.active {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  font-weight: 600;
  box-shadow: inset 3px 0 0 currentColor;
  padding-left: 13px;
}
.dev-pill.active::before { opacity: 1; }

/* ════════════════════════════════════════════════════════════════════
   BUTTONS
   ════════════════════════════════════════════════════════════════════ */
.btn {
  background: var(--surface);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.12s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
}
.btn:hover { border-color: var(--text-3); color: var(--text); background: var(--surface-2); }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: white;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.12s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-primary:hover { background: var(--accent-2); border-color: var(--accent-2); }

.btn-danger {
  background: var(--surface);
  border: 1px solid var(--border-2);
  color: var(--error);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.12s;
}
.btn-danger:hover { border-color: var(--error); background: var(--error-soft); }

.btn-ghost {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-3);
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all 0.12s;
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

/* ════════════════════════════════════════════════════════════════════
   MAIN AREA
   ════════════════════════════════════════════════════════════════════ */
.main {
  grid-area: main;
  background: var(--main);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.main::-webkit-scrollbar { width: 10px; }
.main::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }
.main::-webkit-scrollbar-thumb:hover { background: var(--border-2); }

/* ── Tab bar ────────────────────────────────────────────────── */
.tab-bar {
  height: var(--tabbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 15;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-bar::-webkit-scrollbar { display: none; }

.tab {
  height: 100%;
  padding: 0 14px;
  background: none;
  border: none;
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-3);
  position: relative;
  white-space: nowrap;
  transition: color 0.12s;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.005em;
}
.tab:hover { color: var(--text-2); }
.tab.active { color: var(--text); font-weight: 600; }
.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 8px; right: 8px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px 1px 0 0;
}
.tab .badge {
  display: inline-flex;
  align-items: center;
  height: 18px;
  padding: 0 6px;
  background: var(--surface-2);
  border-radius: 9px;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.tab.active .badge {
  background: var(--accent-soft);
  color: var(--accent-2);
}
.tab[hidden] { display: none; }

/* ── Tab panels ─────────────────────────────────────────────── */
.tab-panel { display: none; padding: 24px 28px; }
.tab-panel.active { display: block; }
.tab-panel[hidden] { display: none; }

.page-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: 22px; gap: 24px;
}
.page-title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.012em;
  color: var(--text);
  margin-bottom: 4px;
}
.page-subtitle {
  font-size: 12.5px;
  color: var(--text-3);
}
.page-actions { display: flex; gap: 8px; }

/* ════════════════════════════════════════════════════════════════════
   OVERVIEW — figures + roster
   ════════════════════════════════════════════════════════════════════ */
.figures-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}
.fig-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  min-height: 110px;
  transition: border-color 0.12s, box-shadow 0.12s;
}
.fig-card:hover {
  border-color: var(--border-2);
  box-shadow: 0 1px 2px rgba(15,23,42,0.04);
}
.fig-card .lbl {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  margin-bottom: 8px;
}
.fig-card .num {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.fig-card .num .unit {
  font-size: 13px;
  color: var(--text-3);
  margin-left: 3px;
  font-weight: 400;
}
.fig-card.accent .num { color: var(--accent); }
.fig-card.success .num { color: var(--success); }
.fig-card.warn .num { color: var(--warning); }
.fig-card.error .num { color: var(--error); }
.fig-card .sub {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-3);
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
.fig-card .spark {
  margin-top: auto;
  padding-top: 12px;
  display: block;
  color: var(--text-4);
}
.fig-card.accent .spark { color: var(--accent); opacity: 0.6; }
.fig-card.success .spark { color: var(--success); opacity: 0.6; }
.fig-card.warn .spark { color: var(--warning); opacity: 0.6; }
.fig-card.error .spark { color: var(--error); opacity: 0.6; }

/* ════════════════════════════════════════════════════════════════════
   ROSTER (per-device table)
   ════════════════════════════════════════════════════════════════════ */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-head {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.card-head .title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.card-head .meta {
  font-size: 11.5px;
  color: var(--text-3);
}

.roster {
  overflow-x: auto;
}
.roster table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.roster thead th {
  text-align: left;
  padding: 10px 14px 10px 0;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  background: var(--surface);
  transition: color 0.12s;
}
.roster thead th:first-child { padding-left: 16px; }
.roster thead th:last-child  { padding-right: 16px; }
.roster thead th:hover { color: var(--accent); }
.roster thead th.sorted { color: var(--accent); }
.roster thead th .arrow {
  display: inline-block; margin-left: 4px;
  opacity: 0.4; font-size: 9px;
}
.roster thead th.sorted .arrow { opacity: 1; }

.roster tbody tr {
  transition: background 0.1s;
}

.roster tbody td {
  padding: 13px 14px 13px 0;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  white-space: nowrap;
  color: var(--text-2);
  font-family: var(--mono);
}
.roster tbody td:first-child { padding-left: 16px; }
.roster tbody td:last-child  { padding-right: 16px; }
.roster tbody tr:last-child td { border-bottom: none; }

.r-id {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text);
}
.r-id .marker {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}
.r-id .nick {
  font-family: var(--sans);
  font-size: 11.5px;
  color: var(--text-3);
  font-weight: 400;
  margin-left: 2px;
}

.r-pct {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid currentColor;
}
.r-pct.low  { color: var(--success); background: var(--success-soft); border-color: rgba(21,128,61,0.25); }
.r-pct.mid  { color: var(--warning); background: var(--warning-soft); border-color: rgba(180,83,9,0.25); }
.r-pct.high { color: var(--error);   background: var(--error-soft);   border-color: rgba(185,28,28,0.25); }

.r-num   { color: var(--text); font-weight: 500; }
.r-dim   { color: var(--text-3); }
.r-warn  { color: var(--error); font-weight: 500; }
.r-ok    { color: var(--text-3); }
.r-spark { display: block; opacity: 0.85; }

.r-ts { font-size: 11px; color: var(--text-3); }

/* ════════════════════════════════════════════════════════════════════
   CHART CONTAINER
   ════════════════════════════════════════════════════════════════════ */
.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--topbar-h) - var(--tabbar-h) - 48px);
  min-height: 420px;
}
.chart-card-head {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.chart-card-head .title {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
}
.chart-card-head .meta {
  font-size: 11.5px;
  color: var(--text-3);
  font-family: var(--mono);
}
.chart-card-head .head-tools {
  display: flex; align-items: center; gap: 16px;
}
.y-range {
  display: flex; align-items: center; gap: 5px;
}
.y-range .y-range-lbl {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-3);
  font-weight: 600;
}
.y-range input {
  width: 58px;
  padding: 4px 7px;
  border: 1px solid var(--border);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  background: var(--surface);
  color: var(--text);
  outline: none;
  font-variant-numeric: tabular-nums;
  transition: border-color 0.12s, box-shadow 0.12s;
}
.y-range input::placeholder { color: var(--text-4); font-weight: 400; }
.y-range input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}
.y-range input::-webkit-outer-spin-button,
.y-range input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.y-range button {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-3);
  width: 24px; height: 24px;
  border-radius: 3px;
  font-size: 12px;
  cursor: pointer;
  display: grid; place-items: center;
  transition: all 0.12s;
}
.y-range button:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.chart-canvas-wrap {
  flex: 1;
  padding: 18px;
  position: relative;
}

/* Info tip: small "i" icon with hover popover */
.info-tip {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
  vertical-align: middle;
  outline: none;
}
.info-tip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 220px;
  height: 12px;
}
.info-icon {
  display: inline-grid;
  place-items: center;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  color: var(--text-3);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  font-style: normal;
  line-height: 1;
  cursor: help;
  transition: all 0.12s;
}
.info-tip:hover .info-icon,
.info-tip:focus .info-icon {
  background: var(--accent-tint);
  border-color: var(--accent);
  color: var(--accent);
}
.info-pop {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  margin-top: 8px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 6px;
  padding: 10px 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  min-width: 200px;
  max-height: 320px;
  overflow-y: auto;
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.12s, transform 0.12s, visibility 0.12s;
}
.info-pop::after {
  content: '';
  position: absolute;
  top: -8px; left: 0; right: 0;
  height: 8px;
}
.info-tip:hover .info-pop,
.info-tip:focus .info-pop {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.info-pop::before {
  content: '';
  position: absolute;
  top: -5px; left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 8px; height: 8px;
  background: var(--surface);
  border-left: 1px solid var(--border-2);
  border-top: 1px solid var(--border-2);
}
.info-pop-title {
  display: block;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 6px;
}
.info-pop-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}
.info-pop-table th {
  text-align: left;
  font-weight: 600;
  color: var(--text-3);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px 4px 0;
  border-bottom: 1px solid var(--border);
}
.info-pop-table td {
  padding: 4px 10px 4px 0;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.info-pop-table tr:last-child td { border-bottom: none; }
.info-pop-table th:last-child,
.info-pop-table td:last-child { padding-right: 0; text-align: right; color: var(--text-3); }

/* ════════════════════════════════════════════════════════════════════
   COMPARE
   ════════════════════════════════════════════════════════════════════ */
.compare-windows {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.compare-win {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  border-left: 3px solid var(--text-4);
}
.compare-win.A { border-left-color: var(--accent); }
.compare-win.B { border-left-color: var(--success); }
.compare-win h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.compare-win.A h4 { color: var(--accent); }
.compare-win.B h4 { color: var(--success); }
.compare-win .range { display: flex; flex-direction: column; gap: 10px; }

#compare-actions { display: flex; gap: 8px; margin-bottom: 16px; }

#compare-results { display: none; }
#compare-results.show { display: block; }
#compare-results table {
  width: auto; min-width: 460px;
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
#compare-results .delta-up   { color: var(--error); font-weight: 600; }
#compare-results .delta-down { color: var(--success); font-weight: 600; }
#compare-results .delta-zero { color: var(--text-4); }

/* ════════════════════════════════════════════════════════════════════
   EMPTY STATE (no data loaded)
   ════════════════════════════════════════════════════════════════════ */
.empty-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.empty-card {
  text-align: center;
  max-width: 420px;
}
.empty-card .icon {
  width: 56px; height: 56px;
  margin: 0 auto 18px;
  border: 1.5px solid var(--border-2);
  border-radius: var(--radius);
  position: relative;
  display: grid;
  place-items: center;
}
.empty-card .icon::before {
  content: '';
  position: absolute;
  width: 22px; height: 1.5px;
  background: var(--text-3);
  top: 50%; left: 50%; transform: translate(-50%,-50%);
}
.empty-card .icon::after {
  content: '';
  position: absolute;
  width: 1.5px; height: 22px;
  background: var(--text-3);
  top: 50%; left: 50%; transform: translate(-50%,-50%);
}
.empty-card .title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.empty-card .desc {
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 18px;
  line-height: 1.5;
}

/* ════════════════════════════════════════════════════════════════════
   MODAL
   ════════════════════════════════════════════════════════════════════ */
#modal {
  display: none;
  position: fixed; inset: 0; z-index: 200;
  background: rgba(24,24,27,0.45);
  align-items: center; justify-content: center;
  padding: 20px;
  backdrop-filter: blur(2px);
}
#modal.show { display: flex; }
#modal .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px 24px;
  max-width: 520px; width: 100%;
  max-height: 85vh; overflow: auto;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
  scrollbar-width: thin;
  scrollbar-color: var(--border-2) transparent;
}
#modal .panel::-webkit-scrollbar { width: 8px; }
#modal .panel::-webkit-scrollbar-track { background: transparent; }
#modal .panel::-webkit-scrollbar-thumb {
  background: var(--border-2);
  border-radius: 4px;
}
#modal .panel::-webkit-scrollbar-thumb:hover { background: var(--text-4); }
#modal h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
#modal .close-btn {
  background: none; border: none;
  color: var(--text-3);
  font-size: 20px;
  cursor: pointer; line-height: 1;
  padding: 0; width: 24px; height: 24px;
  border-radius: 4px;
  transition: all 0.12s;
}
#modal .close-btn:hover { background: var(--surface-2); color: var(--text); }
#modal .kv {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 9px 14px;
  font-size: 12px;
}
#modal .kv .k {
  color: var(--text-3);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
  padding-top: 1px;
}
#modal .kv .v {
  font-family: var(--mono);
  color: var(--text);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

/* ════════════════════════════════════════════════════════════════════
   PER WINDOW MODAL
   ════════════════════════════════════════════════════════════════════ */
#per-window-modal {
  display: none;
  position: fixed; inset: 0; z-index: 220;
  background: rgba(24,24,27,0.45);
  align-items: center; justify-content: center;
  padding: 20px;
  backdrop-filter: blur(2px);
}
#per-window-modal.show { display: flex; }
#per-window-modal .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px 24px;
  max-width: 760px; width: 100%;
  max-height: 85vh;
  display: flex; flex-direction: column;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
}
#per-window-modal h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
#per-window-modal .close-btn {
  background: none; border: none;
  color: var(--text-3);
  font-size: 20px;
  cursor: pointer; line-height: 1;
  padding: 0; width: 24px; height: 24px;
  border-radius: 4px;
}
#per-window-modal .close-btn:hover { background: var(--surface-2); color: var(--text); }
.per-window-summary {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-2);
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
#per-window-modal .roster {
  flex: 1;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--border-2) transparent;
}
#per-window-modal .roster::-webkit-scrollbar { width: 8px; height: 8px; }
#per-window-modal .roster::-webkit-scrollbar-track { background: transparent; }
#per-window-modal .roster::-webkit-scrollbar-thumb {
  background: var(--border-2);
  border-radius: 4px;
}
#per-window-modal .roster::-webkit-scrollbar-thumb:hover { background: var(--text-4); }
#per-window-modal table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}
#per-window-modal thead th {
  position: sticky; top: 0;
  background: var(--surface);
  text-align: left;
  padding: 9px 12px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
}
#per-window-modal tbody td {
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
}
#per-window-modal tbody tr:last-child td { border-bottom: none; }
#per-window-modal tr.per-window-gap td { background: var(--error-soft); color: var(--error); }

/* ════════════════════════════════════════════════════════════════════
   MANAGE-FILES BUTTON (sidebar)
   ════════════════════════════════════════════════════════════════════ */
.manage-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.manage-btn[hidden] { display: none; }
.manage-btn .manage-count {
  background: var(--surface-2);
  padding: 1px 8px;
  border-radius: 9px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-3);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  min-width: 22px;
  text-align: center;
}

/* ════════════════════════════════════════════════════════════════════
   RENAME MODAL
   ════════════════════════════════════════════════════════════════════ */
#rename-modal {
  display: none;
  position: fixed; inset: 0; z-index: 210;
  background: rgba(24,24,27,0.45);
  align-items: center; justify-content: center;
  padding: 20px;
  backdrop-filter: blur(2px);
}
#rename-modal.show { display: flex; }
#rename-modal .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px 24px;
  max-width: 460px; width: 100%;
  display: flex; flex-direction: column;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
}
#rename-modal h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
#rename-modal .close-btn {
  background: none; border: none;
  color: var(--text-3);
  font-size: 20px;
  cursor: pointer; line-height: 1;
  padding: 0; width: 24px; height: 24px;
  border-radius: 4px;
  transition: all 0.12s;
}
#rename-modal .close-btn:hover { background: var(--surface-2); color: var(--text); }

.rename-form { display: flex; flex-direction: column; gap: 14px; }
.rename-row {
  display: flex; align-items: center; gap: 12px;
}
.rename-row.stack { flex-direction: column; align-items: stretch; gap: 6px; }
.rename-key {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.rename-addr {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  background: var(--surface-2);
  padding: 6px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.rename-input {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
}
.rename-hint {
  font-size: 11px;
  color: var(--text-3);
  font-style: italic;
}
.rename-actions {
  display: flex; gap: 8px; justify-content: flex-end;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* ════════════════════════════════════════════════════════════════════
   FILES MODAL
   ════════════════════════════════════════════════════════════════════ */
#files-modal {
  display: none;
  position: fixed; inset: 0; z-index: 200;
  background: rgba(24,24,27,0.45);
  align-items: center; justify-content: center;
  padding: 20px;
  backdrop-filter: blur(2px);
}
#files-modal.show { display: flex; }
#files-modal .panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px 24px;
  max-width: 580px; width: 100%;
  max-height: 85vh;
  display: flex; flex-direction: column;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
}
#files-modal h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
#files-modal .close-btn {
  background: none; border: none;
  color: var(--text-3);
  font-size: 20px;
  cursor: pointer; line-height: 1;
  padding: 0; width: 24px; height: 24px;
  border-radius: 4px;
  transition: all 0.12s;
}
#files-modal .close-btn:hover { background: var(--surface-2); color: var(--text); }

.files-modal-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 12px;
  color: var(--text-3);
}
.files-modal-selectall {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-2);
  font-weight: 500;
  user-select: none;
}
.files-modal-selectall input {
  width: 14px; height: 14px;
  accent-color: var(--accent);
  cursor: pointer;
  margin: 0;
}
.files-modal-summary {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

.files-modal-hint {
  font-size: 11px;
  color: var(--text-3);
  margin-bottom: 12px;
  font-style: italic;
}

.files-modal-list {
  flex: 1;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  max-height: 360px;
  background: var(--surface);
}
.files-modal-list:empty::before {
  content: 'No files loaded.';
  display: block;
  padding: 32px;
  text-align: center;
  color: var(--text-3);
  font-size: 12px;
  font-family: var(--sans);
}

.files-modal-item {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.12s;
}
.files-modal-item:last-child { border-bottom: none; }
.files-modal-item:hover { background: var(--surface-2); }
.files-modal-item.hidden-file { opacity: 0.45; }
.files-modal-item.hidden-file .fi-name { text-decoration: line-through; text-decoration-color: var(--text-4); }
.files-modal-item input[type=checkbox] {
  width: 14px; height: 14px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
  margin: 0;
}
.files-modal-item .fi-name {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.files-modal-item .fi-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  background: var(--surface-2);
  padding: 2px 8px;
  border-radius: 10px;
}

.files-modal-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
button:disabled:hover {
  background: var(--surface);
  border-color: var(--border-2);
  color: var(--text-2);
}

/* ════════════════════════════════════════════════════════════════════
   LOADING BAR
   ════════════════════════════════════════════════════════════════════ */
#loading { display: none; }
#loading.show { display: block; }
#loading .bar {
  height: 2px;
  background: var(--accent);
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 999;
  animation: loading 1.4s ease-in-out infinite;
  transform-origin: 0 50%;
}
@keyframes loading {
  0%   { transform: scaleX(0);  transform-origin: 0 50%; }
  50%  { transform: scaleX(1);  transform-origin: 0 50%; }
  51%  { transform: scaleX(1);  transform-origin: 100% 50%; }
  100% { transform: scaleX(0);  transform-origin: 100% 50%; }
}

/* ════════════════════════════════════════════════════════════════════
   STAGGERED REVEAL
   ════════════════════════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(4px);
  animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.15, 1) forwards;
}
.reveal:nth-child(1) { animation-delay: 0.04s; }
.reveal:nth-child(2) { animation-delay: 0.10s; }
.reveal:nth-child(3) { animation-delay: 0.16s; }
.reveal:nth-child(4) { animation-delay: 0.22s; }
.reveal:nth-child(5) { animation-delay: 0.28s; }
.reveal:nth-child(6) { animation-delay: 0.34s; }
@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════════════ */
@media (max-width: 960px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: var(--topbar-h) auto 1fr;
    grid-template-areas:
      "topbar"
      "sidebar"
      "main";
  }
  .sidebar { border-right: none; border-bottom: 1px solid var(--border); max-height: 40vh; }
  .compare-windows { grid-template-columns: 1fr; }
  .topbar-meta { display: none; }
  .tab-panel { padding: 16px 18px; }
}