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

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

body {
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    sans-serif;
  background: linear-gradient(145deg, #0b1120 0%, #111827 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

.wave-bg {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 280px;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(56,189,248,0.08)" fill-opacity="1" d="M0,224L48,213.3C96,203,192,181,288,186.7C384,192,480,224,576,224C672,224,768,192,864,181.3C960,171,1056,181,1152,197.3C1248,213,1344,235,1392,245.3L1440,256L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>')
    repeat-x;
  background-size: cover;
  opacity: 0.6;
  pointer-events: none;
  z-index: 0;
  animation: waveMove 20s linear infinite;
}

@keyframes waveMove {
  0% {
    background-position-x: 0px;
  }
  100% {
    background-position-x: 1440px;
  }
}

.container {
  max-width: 1000px;
  width: 100%;
  margin: 4vh auto;
  background: rgba(18, 25, 45, 0.75);
  backdrop-filter: blur(20px);
  border-radius: 2rem;
  padding: 1.5rem 2rem 2rem;
  box-shadow:
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1);
  z-index: 2;
  transition: all 0.3s ease;
  animation: fadeInUp 0.6s ease-out;
  overflow-y: auto;
}

.container::-webkit-scrollbar {
  width: 4px;
}

.container::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
}

.container::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.3);
  border-radius: 10px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  font-weight: 800;
  font-size: 1.8rem;
  letter-spacing: -0.5px;
}

.badge {
  background: rgba(56, 189, 248, 0.2);
  border-radius: 40px;
  padding: 0.2rem 1rem;
  font-size: 0.7rem;
  color: #7dd3fc;
  display: inline-block;
  margin-top: 8px;
}

.speed-panel {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-card {
  flex: 1;
  min-width: 110px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 1.5rem;
  padding: 0.8rem 0.5rem;
  text-align: center;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition:
    transform 0.2s,
    border-color 0.2s;
}

.metric-card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.5);
}

.metric-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
  color: #94a3b8;
}

.metric-value {
  font-size: 2rem;
  font-weight: 800;
  font-family: "JetBrains Mono", monospace;
  color: #f0f9ff;
  line-height: 1.2;
  margin: 0.3rem 0;
}

.metric-unit {
  font-size: 0.75rem;
  font-weight: 500;
  color: #cbd5e1;
}

.sub-metric {
  font-size: 0.65rem;
  color: #5ee0fa;
  margin-top: 4px;
}

/* Dual Meters */
.dual-meters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}

.meter-wrapper {
  flex: 1;
  min-width: 200px;
  text-align: center;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 1.8rem;
  padding: 1.2rem 0.8rem;
  transition: all 0.3s;
}

.meter-wrapper.testing {
  background: rgba(56, 189, 248, 0.1);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
}

.meter-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 1px;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.meter-icon {
  font-size: 1rem;
}

.radial-gauge {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto;
}

.gauge-bg {
  fill: none;
  stroke: #1e293b;
  stroke-width: 10;
}

.gauge-fill {
  fill: none;
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 534.07;
  stroke-dashoffset: 534.07;
  transition: stroke-dashoffset 0.3s ease-out;
}

#downloadGaugeFill {
  stroke: url(#downloadGrad);
  filter: drop-shadow(0 0 8px #38bdf8);
}

#uploadGaugeFill {
  stroke: url(#uploadGrad);
  filter: drop-shadow(0 0 8px #f59e0b);
}

.gauge-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.gauge-speed {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: "JetBrains Mono", monospace;
  color: white;
}

.gauge-label {
  font-size: 0.65rem;
  color: #94a3b8;
  margin-top: 2px;
}

.meter-status {
  font-size: 0.7rem;
  color: #5ee0fa;
  margin-top: 10px;
  font-weight: 500;
}

/* Button */
.test-btn {
  background: linear-gradient(105deg, #3b82f6, #8b5cf6);
  border: none;
  padding: 0.9rem 2rem;
  width: 100%;
  border-radius: 3rem;
  font-weight: 700;
  font-size: 1rem;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 1rem 0;
  box-shadow: 0 10px 20px -5px rgba(59, 130, 246, 0.4);
  position: relative;
  overflow: hidden;
}

.test-btn:hover {
  transform: scale(1.02);
  box-shadow: 0 15px 30px -8px rgba(59, 130, 246, 0.6);
}

.test-btn:active {
  transform: scale(0.98);
}

.test-btn.loading {
  background: linear-gradient(105deg, #475569, #334155);
  pointer-events: none;
  opacity: 0.9;
}

.btn-icon {
  font-size: 1rem;
  transition: transform 0.2s;
}

.test-btn:hover .btn-icon {
  transform: translateX(3px);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.info-bar {
  display: flex;
  justify-content: space-between;
  background: rgba(15, 23, 42, 0.6);
  border-radius: 1.5rem;
  padding: 0.7rem 1.2rem;
  margin-top: 1rem;
  font-size: 0.75rem;
  flex-wrap: wrap;
  gap: 10px;
}

.info-item {
  display: flex;
  gap: 6px;
  color: #cbd5e6;
}

.glow-text {
  color: #7dd3fc;
  font-weight: 600;
}

.footer {
  text-align: center;
  font-size: 0.65rem;
  color: #4b5563;
  margin-top: 1rem;
}

/* Animation for testing */
@keyframes gaugePulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.meter-wrapper.testing .gauge-fill {
  animation: gaugePulse 1s infinite;
}

/* Responsive */
@media (max-width: 700px) {
  .container {
    margin: 3vh auto;
    padding: 1rem 1.2rem;
  }

  .dual-meters {
    gap: 1rem;
  }

  .radial-gauge {
    width: 140px;
    height: 140px;
  }

  .gauge-speed {
    font-size: 1.3rem;
  }

  .metric-value {
    font-size: 1.5rem;
  }

  .meter-wrapper {
    min-width: 150px;
    padding: 0.8rem;
  }
}

@media (max-width: 500px) {
  .dual-meters {
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
  }

  .meter-wrapper {
    width: 100%;
    max-width: 250px;
  }

  .radial-gauge {
    width: 160px;
    height: 160px;
  }

  .container {
    margin: 2vh auto;
    padding: 1rem;
  }
}

@media (max-height: 750px) {
  .container {
    margin: 2vh auto;
    padding: 1rem 1.5rem;
  }

  .speed-panel {
    margin-bottom: 0.8rem;
    gap: 0.8rem;
  }

  .dual-meters {
    margin: 1rem 0;
    gap: 1rem;
  }

  .radial-gauge {
    width: 130px;
    height: 130px;
  }

  .gauge-speed {
    font-size: 1.2rem;
  }

  .test-btn {
    margin: 0.8rem 0;
    padding: 0.6rem 1.5rem;
  }
}