:root {
  --bg: #0b0e14;
  --bg-grad: radial-gradient(1200px 600px at 10% -10%, #14203a 0%, transparent 60%),
             radial-gradient(1000px 500px at 100% 0%, #1a1430 0%, transparent 55%);
  --panel: #171d29;
  --panel-2: #1c2331;
  --panel-border: #262f40;
  --text: #e6e9ef;
  --text-dim: #8b95a7;
  --accent: #4f8cff;
  --accent-2: #7c5cff;
  --ok: #3ddc97;
  --warn: #ffb84f;
  --bad: #ff5f6d;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

.topbar {
  padding: 24px 32px 8px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  max-width: 1280px;
  margin: 0 auto;
}
.topbar h1 {
  margin: 0;
  font-size: 28px;
  background: linear-gradient(90deg, #fff, var(--accent) 120%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.subtitle { color: var(--text-dim); margin: 4px 0 0; }

.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-dim);
}
.topbar-user .badge-admin {
  background: var(--accent-2);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
}

main {
  padding: 8px 32px 60px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 1280px;
  margin: 0 auto;
}

.panel {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: 0 8px 24px -12px rgba(0,0,0,0.5);
  max-width: 100%;
  overflow-x: hidden;
}
.panel h2 { margin: 0 0 14px; font-size: 18px; }
.panel h3 { margin: 0 0 10px; font-size: 14px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .04em; }

#add-target-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
#add-target-form input[type="text"], #add-target-form input[type="number"] {
  padding: 10px 12px;
  background: #0d111a;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  color: var(--text);
}
#add-target-form input[type="text"] { flex: 1; min-width: 160px; }
#add-target-form input[type="number"] { width: 110px; }
#add-target-form input[type="color"] {
  width: 46px; height: 40px; padding: 2px;
  background: #0d111a; border: 1px solid var(--panel-border); border-radius: 8px;
}
#add-target-form label.inline {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 11px;
  color: var(--text-dim);
}

button {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  cursor: pointer;
  font-weight: 600;
  transition: filter .12s, transform .12s;
}
button:hover { filter: brightness(1.12); }
button:active { transform: translateY(1px); }
button.secondary {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
}
button.danger {
  background: linear-gradient(135deg, #ff5f6d, #c0392b);
}
button.small { padding: 6px 12px; font-size: 12px; }

.targets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
}

.target-card {
  background: #0d111a;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color .15s, transform .15s;
}
.target-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.target-card.selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 8px 20px -10px var(--accent); }
.target-card.has-outage { border-color: var(--bad); }
.target-card .tc-top {
  display: flex;
  align-items: center;
  gap: 8px;
}
.tc-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; box-shadow: 0 0 8px currentColor; }
.tc-label { font-weight: 600; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tc-host { color: var(--text-dim); font-size: 13px; margin: 4px 0 10px; }
.tc-stats { display: flex; gap: 16px; font-size: 13px; }
.tc-stats b { display: block; font-size: 16px; }
.tc-actions { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.tc-actions button { padding: 5px 10px; font-size: 12px; }
.tc-outage-flag { color: var(--bad); font-weight: 700; font-size: 11px; margin-top: 6px; text-transform: uppercase; letter-spacing: .03em; }

.pill { display: inline-flex; align-items: center; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.pill-ok { color: var(--ok); background: rgba(61,220,151,0.12); }
.pill-warn { color: var(--warn); background: rgba(255,184,79,0.12); }
.pill-bad { color: var(--bad); background: rgba(255,95,109,0.14); }

.loss-ok { color: var(--ok); }
.loss-warn { color: var(--warn); }
.loss-bad { color: var(--bad); }

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.range-buttons { display: flex; gap: 6px; flex-wrap: wrap; }
.range-buttons button {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
}
.range-buttons button.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
}

.family-toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.family-toggle { display: flex; gap: 4px; }
.family-toggle button {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
}
.family-toggle button.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
}

.summary-row {
  display: flex;
  gap: 24px;
  margin: 18px 0;
  flex-wrap: wrap;
}
.summary-item { min-width: 100px; }
.summary-item .label { color: var(--text-dim); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.summary-item .value { font-size: 22px; font-weight: 700; }

/* maintainAspectRatio:false (see app.js) makes Chart.js fill this container's actual CSS
   height instead of deriving it from the canvas' initial width/height HTML attributes —
   the latter shrinks to near-unreadable on a narrow phone viewport since it's purely a
   function of container width. An explicit height keeps both charts equally legible at
   any screen size instead of just at the desktop width they were originally tuned for. */
.chart-wrap { margin-top: 12px; position: relative; }
.chart-wrap-latency { height: 300px; }
.chart-wrap-loss { height: 160px; }

.section-divider {
  border: none;
  border-top: 1px solid var(--panel-border);
  margin: 24px 0;
}

/* Wrap containers for injected tables: on a phone, several data columns (dates, durations,
   hostnames) don't fit a narrow viewport without either scrolling or crushing every cell
   into unreadable slivers — scrolling the table sideways within its own panel keeps every
   cell fully legible instead. Harmless on desktop, where content never actually overflows. */
#outage-table-wrap, #spike-table-wrap, #hops-latest-wrap, #hops-stats-wrap,
#sim-outage-table-wrap, .table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.outage-log h3 { color: var(--bad); }
.outage-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.outage-table th, .outage-table td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--panel-border); }
.outage-table th { color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: .03em; }
.outage-table td { color: var(--bad); font-weight: 600; }
.outage-empty { color: var(--text-dim); font-size: 13px; font-weight: 400; }

.spike-log h3 { color: var(--warn); }
.spike-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.spike-table th, .spike-table td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--panel-border); }
.spike-table th { color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: .03em; }
.spike-table td { color: var(--warn); font-weight: 600; }
.spike-empty { color: var(--text-dim); font-size: 13px; font-weight: 400; }

.explanation-box { font-size: 13px; color: var(--text-dim); }
.explanation-box summary { cursor: pointer; color: var(--text); font-weight: 600; padding: 4px 0; }
.explanation-box ul { margin: 10px 0 0; padding-left: 20px; }
.explanation-box li { margin-bottom: 8px; line-height: 1.5; }
.explanation-box li:last-child { margin-bottom: 0; }
.explanation-box b { color: var(--text); }

.hops-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.hops-table th, .hops-table td { padding: 7px 10px; text-align: left; border-bottom: 1px solid var(--panel-border); }
.hops-table th { color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: .03em; }
.hops-empty { color: var(--text-dim); font-size: 13px; }
.hop-num { color: var(--text-dim); font-variant-numeric: tabular-nums; }
.hop-host { display: block; color: var(--text); }
.hop-ip { color: var(--text-dim); display: block; font-size: 11px; }

.checkbox-inline { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); }
.checkbox-inline input { width: 16px; height: 16px; }

.hops-timeline-list {
  max-width: 100%;
  overflow-x: hidden;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
}
.hop-timeline-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--panel-border);
  min-width: 0;
  max-width: 100%;
  transition: background-color .1s;
}
.hop-timeline-row:last-child { border-bottom: none; }
.hop-timeline-row:nth-child(even) { background: rgba(255,255,255,0.02); }
.hop-timeline-row:hover { background: rgba(79,140,255,0.07); }

.hop-num-badge {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: #0d111a;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}

/* PingPlotter-style status indicator: solid = this hop actually answered at least once,
   hollow = it never responded at all (common for CGNAT hops and routers deep inside a
   provider's own backbone that intentionally ignore TTL-expired probes). */
.hop-status-dot {
  display: inline-block;
  flex-shrink: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 6px var(--ok);
}
.hop-status-dot.unresponsive {
  background: transparent;
  border: 1.5px solid var(--panel-border);
  box-shadow: none;
}

.hop-timeline-label { width: 220px; flex-shrink: 0; font-size: 12.5px; overflow: hidden; }
.hop-timeline-label .hop-host, .hop-timeline-label .hop-ip { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hop-timeline-label .hop-host { font-weight: 600; }
.hop-timeline-label .reached { color: var(--ok); font-weight: 700; }
/* min-width:0 overrides flex items' default min-width:auto, which is what let the canvas
   push the row (and page) wider than the panel instead of shrinking to fit */
.hop-timeline-strip-wrap { flex: 1 1 auto; min-width: 0; height: 30px; position: relative; }
.hop-timeline-strip { width: 100% !important; height: 100% !important; display: block; }
.hop-timeline-summary { width: 120px; flex-shrink: 0; font-size: 12px; text-align: right; }

/* Chart.js external tooltip: rendered as a floating fixed-position element so it can
   never be clipped by the small sparkline canvases it hovers over. */
.chart-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--text);
  box-shadow: 0 8px 24px -8px rgba(0,0,0,0.6);
  transition: opacity .08s;
  white-space: nowrap;
}
.chart-tooltip .tt-title { color: var(--text-dim); font-size: 11px; margin-bottom: 3px; }

.settings-row {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  flex-wrap: wrap;
}
.settings-row label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--text-dim); }
.settings-row input {
  padding: 8px 10px;
  background: #0d111a;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  color: var(--text);
  width: 130px;
}
.settings-row label.wide { flex: 1; min-width: 220px; }
.settings-row input.wide { width: 100%; }

.export-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.export-row input {
  padding: 8px 10px;
  background: #0d111a;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  color: var(--text);
}
.export-row label { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); }
.hint { color: var(--text-dim); font-size: 12px; }

/* login overlay */
.login-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--bg);
  background-image: var(--bg-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.login-box {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 36px 40px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.7);
}
.login-box h1 {
  margin: 0 0 4px;
  font-size: 24px;
  background: linear-gradient(90deg, #fff, var(--accent) 120%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.login-box .subtitle { margin-bottom: 22px; }
.login-box form { display: flex; flex-direction: column; gap: 12px; }
.login-box input {
  padding: 11px 12px;
  background: #0d111a;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}
.login-box button { margin-top: 4px; }
.login-error { color: var(--bad); font-size: 13px; min-height: 18px; }

/* users view */
.users-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.users-table th, .users-table td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--panel-border); }
.users-table th { color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: .03em; }
#add-user-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 16px; }
#add-user-form input[type="text"], #add-user-form input[type="password"] {
  padding: 10px 12px; background: #0d111a; border: 1px solid var(--panel-border); border-radius: 8px; color: var(--text);
}
#add-user-form label.checkbox { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); }

.nav-tabs { display: flex; gap: 8px; margin-bottom: 4px; }
.nav-tabs button {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  padding: 8px 16px;
}
.nav-tabs button.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
}

/* ------------------------------------------------------------------- mobile */
@media (max-width: 680px) {
  .topbar { padding: 16px 14px 6px; gap: 8px; }
  .topbar h1 { font-size: 21px; }
  .topbar-user { font-size: 12px; gap: 6px; flex-wrap: wrap; }
  .topbar-user button { padding: 7px 10px; font-size: 12px; }

  main { padding: 8px 12px 40px; gap: 14px; }
  .panel { padding: 14px 14px; }
  .panel h2 { font-size: 16px; }

  /* Stacked full-width fields read far better than several inputs crammed onto one
     shrunken flex line, which is what a general flex-wrap layout collapses to below
     ~400px — a fixed 160px-min-width host field alone already eats most of the screen. */
  #add-target-form { flex-direction: column; align-items: stretch; }
  #add-target-form input[type="text"],
  #add-target-form input[type="number"],
  #add-target-form select,
  #add-target-form button { width: 100%; min-width: 0; }
  #add-target-form input[type="color"] { width: 100%; height: 38px; }
  #add-target-form label.inline { width: 100%; }

  .targets-grid { grid-template-columns: 1fr; }

  .detail-header { gap: 8px; }
  #detail-title { font-size: 17px; }
  .range-buttons button { padding: 6px 10px; font-size: 12px; }

  .summary-row { gap: 14px 20px; margin: 14px 0; }
  .summary-item { min-width: 84px; }
  .summary-item .value { font-size: 19px; }

  .chart-wrap-latency { height: 220px; }
  .chart-wrap-loss { height: 120px; }

  /* Every data table gets more columns than a phone is wide: rather than crushing dates,
     hostnames and numbers into unreadable slivers (the default width:100% behavior),
     let the table keep its natural width and scroll sideways inside its wrap container
     (see #outage-table-wrap etc. above) instead. */
  .outage-table, .spike-table, .hops-table, .users-table {
    width: auto;
    min-width: 100%;
  }
  .outage-table th, .outage-table td,
  .spike-table th, .spike-table td,
  .hops-table th, .hops-table td,
  .users-table th, .users-table td {
    padding: 7px 8px;
    white-space: nowrap;
  }

  /* The hop-timeline row's three-column layout (fixed 220px label + strip + fixed 120px
     summary) is what actually broke on mobile: 340px of fixed-width columns alone already
     exceeds a phone's usable width, squeezing the strip chart down to a sliver too thin to
     read — exactly the "graphs aren't visible" complaint. Dropping the fixed widths and
     letting flex-wrap fall back to its natural line breaks (badge+dot+label first, since
     they fit one line; then the strip alone, since it's flex-basis:100%; then the summary
     on its own line after) turns each hop into a compact 3-line stack with a full-width,
     fully readable strip — no JS/markup changes needed for this, pure reflow. */
  .hop-timeline-row { flex-wrap: wrap; row-gap: 8px; padding: 10px 12px; }
  .hop-timeline-label { width: auto; flex: 1 1 auto; min-width: 0; }
  .hop-timeline-strip-wrap { flex: 1 1 100%; height: 34px; order: 3; }
  .hop-timeline-summary { width: auto; flex: 1 1 100%; text-align: left; order: 4; }

  .settings-row, .export-row { flex-direction: column; align-items: stretch; gap: 10px; }
  .settings-row label, .export-row label { width: 100%; }
  .settings-row input, .export-row input { width: 100%; }
  .settings-row label.wide { min-width: 0; }

  .login-box { padding: 26px 22px; }
  .login-box h1 { font-size: 21px; }

  .nav-tabs button { padding: 7px 12px; font-size: 13px; }
}

[hidden] { display: none !important; }