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

:root {
  --bg: #0b1120;
  --surface: #131b2e;
  --card: #182240;
  --primary: #00e5ff;
  --accent: #00e676;
  --danger: #ff1744;
  --warn: #ffab40;
  --text: #e0e6f0;
  --text-dim: #6b7a99;
  --font: 'Inter', system-ui, sans-serif;
  --radius: 16px;
}

html { font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  overflow-x: hidden;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

#app {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

/* ── Header ────────────────────────────────────────── */
.header {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 0 0.5rem;
}
.header__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.header__brand a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
}
.header__logo {
  height: 48px;
  width: auto;
  object-fit: contain;
}
.header__title {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.header__tagline {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
}

/* ── Gauge ─────────────────────────────────────────── */
.main {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem 0;
}

.gauge-wrapper {
  position: relative;
  max-width: 300px;
  width: 100%;
  aspect-ratio: 300 / 220;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.gauge { width: 100%; height: auto; }

.gauge__label {
  fill: var(--text-dim);
  font-size: 11px;
  font-family: var(--font);
}

.gauge__value {
  position: absolute;
  bottom: 22%;
  font-size: clamp(2rem, 8vw, 3rem);
  font-weight: 900;
  letter-spacing: -2px;
  color: var(--primary);
  text-shadow: 0 0 20px rgba(0,229,255,0.4);
  transition: color 0.3s;
}
.gauge__unit {
  position: absolute;
  bottom: 14%;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.gauge__phase {
  position: absolute;
  bottom: 3%;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ── Start Button ──────────────────────────────────── */
.btn-start {
  position: relative;
  width: clamp(120px, 30vw, 160px);
  height: clamp(120px, 30vw, 160px);
  border-radius: 50%;
  border: 3px solid var(--primary);
  background: radial-gradient(circle at 40% 40%, #14263f 0%, var(--surface) 100%);
  color: var(--primary);
  font-family: var(--font);
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 900;
  letter-spacing: 3px;
  cursor: pointer;
  outline: none;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(0,229,255,0.15);
  transition: transform 0.2s, box-shadow 0.3s, border-color 0.3s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.btn-start:hover {
  transform: scale(1.06);
  box-shadow: 0 0 60px rgba(0,229,255,0.3);
}
.btn-start:active { transform: scale(0.97); }
.btn-start:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 4px;
}
.btn-start.running {
  border-color: var(--accent);
  color: var(--accent);
  cursor: pointer;
  animation: pulse-ring 1.5s infinite;
}
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(0,230,118,0.5); }
  70%  { box-shadow: 0 0 0 20px rgba(0,230,118,0); }
  100% { box-shadow: 0 0 0 0 rgba(0,230,118,0); }
}
.btn-start__ripple {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(0,229,255,0.08);
  animation: ripple 2s linear infinite;
  pointer-events: none;
}
@keyframes ripple {
  0%   { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ── Results Cards ─────────────────────────────────── */
.results {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  width: 100%;
}
.results.visible {
  display: grid;
  animation: resultsIn 0.5s ease-out;
}
@keyframes resultsIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1rem 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  min-width: 0;
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
  transition: transform 0.2s;
}
.result-card:hover { transform: translateY(-4px); }
.result-card__icon {
  font-size: 1.3rem;
  line-height: 1;
}
.result-card__value {
  font-size: clamp(1.1rem, 3.5vw, 1.4rem);
  font-weight: 700;
  color: var(--primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}
.result-card__label {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.result-card__sub {
  font-size: 0.65rem;
  color: var(--text-dim);
}

/* ── Connection Info ────────────────────────────────── */
.conn-info {
  width: 100%;
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem 1rem;
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
  border: 1px solid rgba(0,229,255,0.06);
}
.conn-info__title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  font-weight: 700;
  margin: 0 0 0.85rem;
  text-align: center;
}
.conn-info__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem 1.5rem;
}
.conn-info__item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}
.conn-info__label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-dim);
  font-weight: 600;
}
.conn-info__value {
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
@keyframes shimmer {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}
.conn-info:not(.conn-info--loaded) .conn-info__value {
  animation: shimmer 1.8s ease-in-out infinite;
  color: var(--text-dim);
}
.conn-info--loaded .conn-info__value {
  animation: none;
}
.conn-info__flags {
  display: none;
  margin-top: 0.75rem;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(107,122,153,0.15);
  font-size: 0.72rem;
  color: var(--warn);
  font-weight: 600;
  text-align: center;
}

/* ── Noscript ──────────────────────────────────────── */
.noscript-msg {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text);
  font-size: 1.1rem;
}

/* ── Footer ────────────────────────────────────────── */
.footer {
  margin-top: auto;
  padding: 2rem 0 1rem;
  font-size: 0.7rem;
  color: var(--text-dim);  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}
.footer__link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}
.footer__link:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ── Privacy Policy Page ───────────────────────────── */
.app--policy { max-width: 800px; }

.policy {
  width: 100%;
  padding: 0.5rem 0 3rem;
  line-height: 1.8;
}
.policy__back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--primary);
  text-decoration: none;
  margin-bottom: 2rem;
  font-weight: 600;
  transition: color 0.2s, opacity 0.2s;
}
.policy__back:hover { opacity: 0.7; }

.policy__title {
  font-size: 2.2rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.35rem;
}
.policy__date {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

/* Document body card */
.policy__body {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2.5rem 2.25rem;
  border: 1px solid rgba(255,255,255,0.04);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

/* Section blocks */
.policy__section {
  margin-bottom: 2.5rem;
}
.policy__section:last-child {
  margin-bottom: 0;
}
.policy__section h2 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid rgba(0,229,255,0.15);
  letter-spacing: -0.2px;
}
.policy__section h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin: 1.5rem 0 0.6rem;
}
.policy__section p {
  font-size: 0.92rem;
  color: var(--text);
  margin-bottom: 0.8rem;
  line-height: 1.8;
}
.policy__section ul {
  padding-left: 0;
  list-style: none;
  margin: 0.6rem 0 1rem;
}
.policy__section li {
  font-size: 0.92rem;
  color: var(--text);
  margin-bottom: 0.55rem;
  line-height: 1.75;
  padding-left: 1.4rem;
  position: relative;
}
.policy__section li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.policy__section a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}
.policy__section a:hover {
  text-decoration: underline;
}

/* Highlighted content cards */
.policy__card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid rgba(0,229,255,0.08);
  padding: 1.25rem 1.5rem;
  margin: 1rem 0;
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.policy__card h3 {
  margin-top: 0 !important;
}
.policy__card p {
  margin-bottom: 0.35rem;
}
.policy__card p:last-child {
  margin-bottom: 0;
}

/* ── Reduced Motion ────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .btn-start.running { animation: none; }
  .btn-start__ripple { animation: none; opacity: 0; }
  .results.visible { animation: none; }
  .result-card { transition: none; }
}

/* ── Responsive ────────────────────────────────────── */

/* Tablets & large phones */
@media (max-width: 768px) {
  #app { padding: 0.75rem; }
  .header { padding: 1rem 0 0.5rem; }
}

/* Standard phones */
@media (max-width: 600px) {
  .results { grid-template-columns: repeat(2, 1fr); }
  .result-card { padding: 0.85rem 0.5rem; }
  .conn-info__grid { grid-template-columns: 1fr 1fr; gap: 0.5rem 1rem; }
  .policy__body { padding: 1.5rem 1.25rem; }
  .policy__title { font-size: 1.6rem; }
}

/* Small phones */
@media (max-width: 480px) {
  .gauge-wrapper { max-width: 260px; }
  .header__logo { height: 36px; }
  .header__title { font-size: 1.25rem; }
}

/* Very small devices */
@media (max-width: 360px) {
  .gauge-wrapper { max-width: 220px; }
  .btn-start { width: 110px; height: 110px; font-size: 1rem; }
  .result-card__value { font-size: 1rem; }
  #app { padding: 0.5rem; }
  .policy__body { padding: 1rem 0.75rem; }
}