/* ============================================================
   NetQuality – Mobile-first dark theme
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0; padding: 0;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --bg:       #0a0e17;
  --surf:     #0f1624;
  --surf2:    #162030;
  --surf3:    #1d2b3e;
  --bdr:      #243044;
  --bdr2:     #2e3f58;

  --cyan:     #00c8ff;
  --cyan-glo: rgba(0,200,255,.25);
  --green:    #00e676;
  --green-glo:rgba(0,230,118,.25);
  --orange:   #ff9100;
  --red:      #ff5252;
  --purple:   #7c4dff;
  --yellow:   #ffd740;

  --txt:      #e8ecf0;
  --txt-m:    #8899aa;
  --txt-d:    #435060;

  --nav-h:    60px;
  --hdr-h:    52px;
  --r:        12px;

  --mono: 'JetBrains Mono', 'Courier New', monospace;
  --sans: 'Inter', system-ui, sans-serif;
}

html, body { height: 100%; overflow: hidden; background: var(--bg); color: var(--txt); font-family: var(--sans); -webkit-font-smoothing: antialiased; }

/* ── APP SHELL ─────────────────────────────────────────────── */
#app {
  display: flex; flex-direction: column; height: 100%;
  background: var(--bg);
  position: relative;
}

/* ── HEADER ─────────────────────────────────────────────────── */
#app-header {
  height: var(--hdr-h); flex-shrink: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  background: var(--surf); border-bottom: 1px solid var(--bdr);
  z-index: 10;
}

.header-left { display: flex; align-items: center; gap: 10px; }

.logo-icon {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  display: flex; align-items: center; justify-content: center; padding: 5px;
}
.logo-icon svg { width: 100%; height: 100%; color: #fff; }

.logo-text {
  font-size: 17px; font-weight: 700; letter-spacing: -.5px;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.conn-badge {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 10px; border-radius: 20px;
  background: var(--surf2); border: 1px solid var(--bdr);
  font-size: 12px; color: var(--txt-m);
}

.conn-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  animation: blink 2s ease infinite;
}
.conn-dot.offline { background: var(--red); animation: none; }

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.4} }

/* ── MAIN / TABS ────────────────────────────────────────────── */
#main-content { flex: 1; overflow: hidden; position: relative; }

.tab-pane {
  position: absolute; inset: 0;
  overflow-y: auto; padding: 14px 14px 20px;
  opacity: 0; transform: translateX(16px);
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
  scrollbar-width: thin; scrollbar-color: var(--bdr2) transparent;
}
.tab-pane::-webkit-scrollbar { width: 3px; }
.tab-pane::-webkit-scrollbar-thumb { background: var(--bdr2); border-radius: 2px; }

.tab-pane.active {
  opacity: 1; transform: translateX(0);
  pointer-events: all;
}

/* ── GAUGE ──────────────────────────────────────────────────── */
.gauge-wrapper {
  display: flex; flex-direction: column; align-items: center;
  margin: 4px 0 16px;
}

#speedGauge {
  width: min(270px, 80vw); height: min(270px, 80vw);
  filter: drop-shadow(0 0 20px rgba(0,200,255,.12));
}

.g-val {
  font-family: var(--mono); font-size: 40px; font-weight: 600;
  fill: var(--txt);
}
.g-unit {
  font-family: var(--mono); font-size: 12px; fill: var(--cyan);
  text-transform: uppercase; letter-spacing: 2.5px; font-weight: 500;
}
.g-label {
  font-size: 10px; fill: var(--txt-m);
  text-transform: uppercase; letter-spacing: 2px;
}

.gauge-minmax {
  display: flex; justify-content: space-between;
  width: min(200px, 60vw); margin-top: -8px;
  font-size: 10px; color: var(--txt-d); font-family: var(--mono);
}

/* ── START BUTTON ───────────────────────────────────────────── */
.speed-action { display: flex; justify-content: center; margin-bottom: 14px; }

.btn-start {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 44px; border-radius: 50px; border: none;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  color: #fff; font-size: 15px; font-weight: 600; font-family: var(--sans);
  cursor: pointer; letter-spacing: .3px;
  box-shadow: 0 4px 24px rgba(0,200,255,.35);
  transition: transform .2s, box-shadow .2s;
}
.btn-start:hover  { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,200,255,.45); }
.btn-start:active { transform: scale(.97); }
.btn-start:disabled { opacity: .45; pointer-events: none; }

/* ── PHASE BAR ──────────────────────────────────────────────── */
.phase-bar {
  display: flex; align-items: center; justify-content: center;
  gap: 0; margin-bottom: 16px;
}
.phase-bar.hidden { display: none !important; }

.phase-step { display: flex; flex-direction: column; align-items: center; gap: 5px; }
.phase-step span { font-size: 10px; color: var(--txt-d); text-transform: uppercase; letter-spacing: 1px; }
.phase-step.active span { color: var(--cyan); }
.phase-step.done span { color: var(--green); }

.phase-dot {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--bdr2); background: var(--surf3);
  transition: all .3s;
}
.phase-step.active .phase-dot {
  border-color: var(--cyan); background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan-glo);
  animation: blink 1s ease infinite;
}
.phase-step.done .phase-dot {
  border-color: var(--green); background: var(--green);
}

.phase-line {
  width: 48px; height: 2px; background: var(--bdr2);
  margin-bottom: 16px;
}

/* ── RESULT GRID ─────────────────────────────────────────────── */
.result-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: 10px; margin-top: 4px;
}
.result-grid.hidden { display: none !important; }

.rcard {
  background: var(--surf); border: 1px solid var(--bdr);
  border-radius: var(--r); padding: 14px 10px; text-align: center;
  position: relative; overflow: hidden;
}
.rcard::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
}
.rcard-dl::before    { background: var(--green);  }
.rcard-ul::before    { background: var(--cyan);   }
.rcard-ping::before  { background: var(--orange); }
.rcard-jitter::before{ background: var(--purple); }
.rcard-qual::before  { background: var(--yellow); }
.rcard-server::before{ background: var(--txt-d);  }

.rcard-icon { font-size: 16px; margin-bottom: 4px; }
.rcard-dl .rcard-icon    { color: var(--green);  }
.rcard-ul .rcard-icon    { color: var(--cyan);   }
.rcard-ping .rcard-icon  { color: var(--orange); }
.rcard-jitter .rcard-icon{ color: var(--purple); }
.rcard-qual .rcard-icon  { color: var(--yellow); }
.rcard-server .rcard-icon{ color: var(--txt-d);  }

.rcard-val  { font-family: var(--mono); font-size: 24px; font-weight: 600; color: var(--txt); line-height: 1; }
.rcard-unit { font-size: 10px; color: var(--txt-m); text-transform: uppercase; letter-spacing: 1px; margin-top: 2px; }
.rcard-lbl  { font-size: 10px; color: var(--txt-d); text-transform: uppercase; letter-spacing: 1px; margin-top: 3px; }

/* ── PING TAB ────────────────────────────────────────────────── */
.ping-top { display: flex; gap: 10px; margin-bottom: 12px; }

.ping-big-card {
  min-width: 96px; background: var(--surf);
  border: 1px solid var(--cyan); border-radius: var(--r);
  padding: 14px 10px; text-align: center;
  box-shadow: 0 0 16px rgba(0,200,255,.1);
}
.pbig-val  { font-family: var(--mono); font-size: 44px; font-weight: 700; color: var(--cyan); line-height: 1; }
.pbig-unit { font-size: 11px; color: var(--txt-m); text-transform: uppercase; letter-spacing: 1px; }
.pbig-lbl  { font-size: 10px; color: var(--txt-d); text-transform: uppercase; letter-spacing: 1px; margin-top: 3px; }

.ping-mini-grid { flex: 1; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }

.pmini {
  background: var(--surf); border: 1px solid var(--bdr);
  border-radius: 10px; padding: 8px 8px 6px;
  display: flex; flex-direction: column; gap: 1px;
}
.pm-lbl  { font-size: 9px;  color: var(--txt-d); text-transform: uppercase; letter-spacing: 1px; }
.pm-val  { font-family: var(--mono); font-size: 17px; font-weight: 600; color: var(--txt); }
.pm-unit { font-size: 9px; color: var(--txt-m); }

.pmini-jitter .pm-val { color: var(--purple); }

/* ── PING CHART ─────────────────────────────────────────────── */
.chart-box {
  background: var(--surf); border: 1px solid var(--bdr);
  border-radius: var(--r); padding: 10px; margin-bottom: 12px;
}
#pingChart { width: 100% !important; height: 130px !important; display: block; }
.chart-overlay {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-top: 6px; font-size: 10px;
}
.co-good { color: var(--green); }
.co-warn { color: var(--orange); }
.co-bad  { color: var(--red); }

.ping-controls {
  display: flex; gap: 8px; align-items: center;
  margin-bottom: 12px;
}
.ping-controls input { flex: 1; min-width: 0; }
.ping-controls button { flex-shrink: 0; }

/* ── TRACEROUTE ──────────────────────────────────────────────── */
.trace-controls { display: flex; gap: 8px; margin-bottom: 12px; }
.trace-controls input { flex: 1; min-width: 0; }
.trace-controls button { flex-shrink: 0; }

.trace-progress {
  background: var(--surf); border: 1px solid var(--bdr);
  border-radius: var(--r); padding: 12px; margin-bottom: 12px;
}
.trace-progress.hidden { display: none !important; }

.tprog-bar { height: 3px; background: var(--surf3); border-radius: 2px; overflow: hidden; margin-bottom: 8px; }
.tprog-fill {
  height: 100%; width: 35%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  border-radius: 2px; animation: slide 1.4s ease infinite;
}
@keyframes slide { 0%{transform:translateX(-100%)} 100%{transform:translateX(420%)} }

#trace-status-txt { font-size: 12px; color: var(--txt-m); }

.trace-wrap {
  background: var(--surf); border: 1px solid var(--bdr);
  border-radius: var(--r); overflow: hidden;
}

.tr-empty {
  text-align: center; color: var(--txt-d);
  padding: 28px; font-size: 13px;
}

.hop-row {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 14px; border-bottom: 1px solid var(--bdr);
}
.hop-row:last-child { border-bottom: none; }
.hop-row:hover { background: var(--surf2); }

.hop-num {
  font-family: var(--mono); font-size: 11px; color: var(--txt-d);
  min-width: 22px; text-align: center; flex-shrink: 0;
}

.hop-info { flex: 1; min-width: 0; }
.hop-ip   { font-family: var(--mono); font-size: 13px; color: var(--cyan); display: block; }
.hop-host { font-size: 10px; color: var(--txt-m); display: block;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.hop-right {
  display: flex; flex-direction: column; align-items: flex-end;
  gap: 4px; flex-shrink: 0;
}
.hop-rtt      { font-family: var(--mono); font-size: 12px; color: var(--green); white-space: nowrap; }
.hop-rtt.slow { color: var(--orange); }
.hop-rtt.bad  { color: var(--red); }

.sbadge {
  display: inline-block; padding: 2px 7px; border-radius: 20px;
  font-size: 10px; font-family: var(--sans);
}
.sb-ok      { background: rgba(0,230,118,.12); color: var(--green); }
.sb-slow    { background: rgba(255,145,0,.12);  color: var(--orange); }
.sb-timeout { background: rgba(255,82,82,.12);  color: var(--red); }
.sb-dest    { background: rgba(0,200,255,.12);  color: var(--cyan); }

/* ── INFO TAB ────────────────────────────────────────────────── */
.info-loading {
  display: flex; flex-direction: column; align-items: center;
  gap: 12px; padding: 36px; color: var(--txt-m); font-size: 13px;
}

.spinner {
  width: 26px; height: 26px;
  border: 3px solid var(--bdr2); border-top-color: var(--cyan);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.info-card {
  background: var(--surf); border: 1px solid var(--bdr);
  border-radius: var(--r); padding: 14px; margin-bottom: 12px;
}
.info-card-title {
  font-size: 10px; color: var(--txt-d); text-transform: uppercase;
  letter-spacing: 1.5px; margin-bottom: 10px; font-weight: 600;
}
.irow {
  display: flex; justify-content: space-between; align-items: center;
  padding: 7px 0; border-bottom: 1px solid var(--bdr);
}
.irow:last-child { border-bottom: none; }
.ikey { font-size: 13px; color: var(--txt-m); }
.ival { font-family: var(--mono); font-size: 13px; color: var(--txt); text-align: right; max-width: 58%; word-break: break-all; }
.ival.hi { color: var(--cyan); }

/* ── DNS ─────────────────────────────────────────────────────── */
.dns-box {
  background: var(--surf); border: 1px solid var(--bdr);
  border-radius: var(--r); padding: 14px; margin-top: 4px;
}
.sec-title {
  font-size: 11px; font-weight: 600; color: var(--txt-m);
  text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 10px;
}
.dns-row { display: flex; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.dns-row input { flex: 1; min-width: 120px; }
.dns-results { min-height: 36px; }
.dns-empty { color: var(--txt-d); font-size: 13px; text-align: center; padding: 14px; }

.drec {
  background: var(--surf2); border: 1px solid var(--bdr);
  border-radius: 8px; padding: 10px 12px; margin-bottom: 8px;
}
.drec-type {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 10px; background: rgba(0,200,255,.12); color: var(--cyan);
  margin-bottom: 5px; font-family: var(--mono);
}
.drec-val { font-family: var(--mono); font-size: 12px; color: var(--txt); word-break: break-all; }
.drec-ttl { font-size: 10px; color: var(--txt-d); margin-top: 3px; }

/* ── SHARED INPUTS ───────────────────────────────────────────── */
input[type="text"], select {
  background: var(--surf2); border: 1px solid var(--bdr);
  border-radius: 10px; padding: 10px 13px;
  color: var(--txt); font-size: 14px; font-family: var(--sans);
  outline: none; -webkit-appearance: none;
  transition: border-color .2s, box-shadow .2s;
}
input[type="text"]:focus, select:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,200,255,.1);
}
input[type="text"]::placeholder { color: var(--txt-d); }

select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238899aa' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center; background-size: 14px;
  padding-right: 30px;
}
select option { background: var(--surf2); }

/* ── BUTTONS ─────────────────────────────────────────────────── */
.btn-sec {
  padding: 10px 18px; border-radius: 10px;
  background: var(--surf2); border: 1px solid var(--bdr2);
  color: var(--cyan); font-size: 14px; font-weight: 500; font-family: var(--sans);
  cursor: pointer; white-space: nowrap;
  transition: background .18s, border-color .18s, transform .15s;
}
.btn-sec:hover  { background: var(--surf3); border-color: var(--cyan); }
.btn-sec:active { transform: scale(.96); }
.btn-sec:disabled { opacity: .35; pointer-events: none; }

.btn-danger {
  padding: 10px 18px; border-radius: 10px;
  background: rgba(255,82,82,.08); border: 1px solid var(--red);
  color: var(--red); font-size: 14px; font-weight: 500; font-family: var(--sans);
  cursor: pointer; white-space: nowrap;
  transition: background .18s, transform .15s;
}
.btn-danger:hover  { background: rgba(255,82,82,.16); }
.btn-danger:active { transform: scale(.96); }

.hidden { display: none !important; }

/* ── BOTTOM NAV ──────────────────────────────────────────────── */
#bottom-nav {
  height: var(--nav-h); flex-shrink: 0;
  display: flex; background: var(--surf); border-top: 1px solid var(--bdr);
}
.nav-btn {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 3px;
  background: none; border: none; color: var(--txt-d);
  cursor: pointer; padding: 6px 0; position: relative;
  transition: color .18s;
}
.nav-btn svg { width: 20px; height: 20px; transition: transform .18s; }
.nav-btn span { font-size: 9px; font-weight: 500; text-transform: uppercase; letter-spacing: .5px; }
.nav-btn.active { color: var(--cyan); }
.nav-btn.active::after {
  content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 32px; height: 2px; background: var(--cyan); border-radius: 0 0 3px 3px;
}
.nav-btn:hover { color: var(--txt); }
.nav-btn.active:hover { color: var(--cyan); }

/* ── DESKTOP ─────────────────────────────────────────────────── */
@media (min-width: 481px) {
  #app { height: 100vh; }
}

/* ── SAFE AREA (iOS) ─────────────────────────────────────────── */
@supports (padding: env(safe-area-inset-bottom)) {
  #bottom-nav { padding-bottom: env(safe-area-inset-bottom); height: calc(var(--nav-h) + env(safe-area-inset-bottom)); }
}