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

:root {
  --bg:          #07080f;
  --surface:     #0d0f1a;
  --border:      #16192a;
  --accent:      #00c8ff;
  --accent-dim:  #004d62;
  --text:        #f0f4ff;
  --text-mid:    #3a4060;
  --text-muted:  #1a1e2e;
  --btn-bg:      #00c8ff;
  --btn-text:    #07080f;
}

html, body {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ───────────────────────────────────────────────────────────────── */
header {
  padding: 2rem 2.5rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.logo-img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.wordmark {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: lowercase;
  color: var(--accent);
  opacity: 0.85;
}

/* ── Main layout ──────────────────────────────────────────────────────────── */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  padding: 2rem 1.5rem 4rem;
}

/* ── Hero number ──────────────────────────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  min-height: 9rem;
  justify-content: center;
}

.hero-number {
  font-size: clamp(4.5rem, 14vw, 8rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  transition: color 0.3s ease;
  min-width: 3ch;
  text-align: center;
}

/* Subtle glow on the number while actively measuring */
.hero-number.live {
  color: #fff;
  text-shadow: 0 0 40px rgba(0, 200, 255, 0.25);
}

.hero-unit {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mid);
  transition: color 0.3s ease;
}

.hero-unit.live {
  color: var(--accent);
}

.hero-label {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-top: 0.15rem;
  height: 1em;
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Animated dot shown while a phase is running */
.hero-label::before {
  content: '';
  display: none;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.2s ease-in-out infinite;
}

.hero-label.running::before {
  display: inline-block;
}

@keyframes pulse {
  0%, 100% { opacity: 1;   transform: scale(1);    }
  50%       { opacity: 0.3; transform: scale(0.7); }
}

/* ── Progress bar ─────────────────────────────────────────────────────────── */
.progress-track {
  width: min(420px, 85vw);
  height: 2px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s ease;
  box-shadow: 0 0 8px rgba(0, 200, 255, 0.6);
}

/* ── Result metrics ───────────────────────────────────────────────────────── */
.metrics {
  display: flex;
  align-items: center;
  gap: 0;
}

.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0 2.5rem;
  min-width: 100px;
  transition: opacity 0.3s ease;
}

.metric-divider {
  width: 1px;
  height: 2.5rem;
  background: var(--border);
  flex-shrink: 0;
}

.metric-label {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-mid);
  transition: color 0.3s ease;
}

.metric-value {
  font-size: 1.6rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  line-height: 1;
  transition: color 0.4s ease;
}

.metric-unit {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.3s ease;
}

/* Active phase: highlight the relevant metric */
.metric.active .metric-label { color: var(--accent); }
.metric.active .metric-value { color: var(--accent); }
.metric.active .metric-unit  { color: var(--accent); }

/* Completed metric: fully lit */
.metric.done .metric-label { color: var(--text-mid); }
.metric.done .metric-value { color: var(--text);     }
.metric.done .metric-unit  { color: var(--text-mid); }

/* ── View switching ───────────────────────────────────────────────────────── */
.view {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
  width: 100%;
}

/* ── Server picker ────────────────────────────────────────────────────────── */
.picker-heading {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-mid);
}

.server-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: min(480px, 90vw);
}

.server-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  user-select: none;
}

.server-card:hover:not(.offline):not(.selected) {
  border-color: var(--text-mid);
  background: #10131f;
}

.server-card.selected {
  border-color: var(--accent);
  background: #071520;
}

.server-card.offline {
  opacity: 0.35;
  cursor: default;
}


.server-card-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.server-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.server-location {
  font-size: 0.7rem;
  color: var(--text-mid);
  margin-top: 0.15rem;
  letter-spacing: 0.04em;
}

.server-card-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.server-best {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.server-ping {
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-mid);
  min-width: 4.5rem;
  text-align: right;
  transition: color 0.3s ease;
}

.server-ping.loaded {
  color: var(--accent);
}

.server-offline-label {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-mid);
}

/* ── Server badge (shown in test view) ────────────────────────────────────── */
.server-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-mid);
}

.badge-dot {
  opacity: 0.4;
}

.badge-change {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.72rem;
  cursor: pointer;
  padding: 0 0.2rem;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.badge-change:hover {
  opacity: 1;
}

/* ── Client IP ────────────────────────────────────────────────────────────── */
.client-ip {
  font-size: 0.72rem;
  color: #6b7aaa;
  letter-spacing: 0.06em;
}

/* ── Start button ─────────────────────────────────────────────────────────── */
.btn-start {
  margin-top: 0.5rem;
  padding: 0.8rem 3.5rem;
  background: var(--accent);
  color: var(--btn-text);
  border: none;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease, opacity 0.2s ease;
  outline: none;
}

.btn-start:hover:not(:disabled) {
  background: #33d4ff;
  transform: translateY(-1px);
}

.btn-start:active:not(:disabled) {
  transform: translateY(0);
}

.btn-start.running {
  background: transparent;
  color: var(--text-mid);
  border: 1px solid var(--border);
}

.btn-start.running:hover {
  color: var(--text);
  border-color: var(--text-mid);
  background: transparent;
  transform: none;
}

/* ── Responsive tweaks ────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .metric {
    padding: 0 1.25rem;
    min-width: 70px;
  }

  .metric-value {
    font-size: 1.25rem;
  }

  header {
    padding: 1.25rem 1.5rem;
  }
}