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

:root {
  --cyan: #00f0ff;
  --green: #00ff88;
  --bg: #0a0a12;
  --surface: #0d0d1a;
  --text: #c8e6f0;
  --glow: 0 0 10px rgba(0,240,255,0.3), 0 0 40px rgba(0,240,255,0.1);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Courier New', 'Consolas', 'Monaco', monospace;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 59px, rgba(0,240,255,0.03) 59px, rgba(0,240,255,0.03) 60px),
    repeating-linear-gradient(90deg, transparent, transparent 59px, rgba(0,240,255,0.03) 59px, rgba(0,240,255,0.03) 60px),
    repeating-linear-gradient(0deg, transparent, transparent 19px, rgba(0,240,255,0.015) 19px, rgba(0,240,255,0.015) 20px),
    repeating-linear-gradient(90deg, transparent, transparent 19px, rgba(0,240,255,0.015) 19px, rgba(0,240,255,0.015) 20px);
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.12) 2px, rgba(0,0,0,0.12) 4px);
  pointer-events: none;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid rgba(0,240,255,0.15);
  background: rgba(0,240,255,0.03);
  border-radius: 4px;
  margin-bottom: 12px;
}

header h1 {
  font-size: 14px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--cyan);
  text-shadow: 0 0 8px rgba(0,240,255,0.4);
}

header .status {
  font-size: 11px;
  color: rgba(200,230,240,0.5);
  letter-spacing: 1px;
}

header .status .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}

.dot.online { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot.offline { background: #ff4444; box-shadow: 0 0 6px #ff4444; }
.dot.loading { background: #ffaa00; box-shadow: 0 0 6px #ffaa00; animation: pulse 1s infinite; }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

.rate-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  margin-bottom: 12px;
  border: 1px solid rgba(0,240,255,0.1);
  background: rgba(0,240,255,0.02);
  border-radius: 4px;
}

.rate-main {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.rate-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: rgba(200,230,240,0.5);
}

.rate-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 15px rgba(0,240,255,0.4), 0 0 60px rgba(0,240,255,0.1);
  font-variant-numeric: tabular-nums;
}

.rate-change {
  font-size: 14px;
  margin-left: 12px;
}

.rate-change.up { color: var(--green); }
.rate-change.down { color: #ff4444; }
.rate-change.neutral { color: #556677; }

.rate-meta {
  text-align: right;
  font-size: 11px;
  color: rgba(200,230,240,0.35);
  line-height: 1.6;
}

.chart-wrapper {
  flex: 1;
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  position: relative;
  border: 1px solid rgba(0,240,255,0.1);
  background: rgba(0,0,0,0.4);
  border-radius: 4px;
}

.chart-wrapper canvas {
  display: block;
  height: 100%;
  cursor: crosshair;
}

.chart-loading {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5,5,15,0.92);
  transition: opacity 0.5s;
  pointer-events: none;
}

.chart-loading.hidden {
  opacity: 0;
}

.scanline {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(0,240,255,0.25);
  box-shadow: 0 0 8px rgba(0,240,255,0.3);
  animation: scanline 3s ease-in-out infinite;
}

@keyframes scanline {
  0%   { top: -2px; }
  100% { top: 100%; }
}

.loading-text {
  position: relative;
  z-index: 1;
  font-family: inherit;
  font-size: 14px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--cyan);
  text-shadow: 0 0 10px rgba(0,240,255,0.3);
}

.loading-dots::after {
  display: inline-block;
  width: 1em;
  text-align: left;
  animation: dots 2s steps(4) infinite;
  content: '';
}

@keyframes dots {
  0%   { content: ''; }
  25%  { content: '.'; }
  50%  { content: '..'; }
  75%  { content: '...'; }
}

.tooltip {
  position: absolute;
  display: none;
  pointer-events: none;
  background: rgba(0,0,0,0.85);
  border: 1px solid var(--cyan);
  padding: 8px 12px;
  font-size: 12px;
  color: var(--cyan);
  text-shadow: 0 0 6px rgba(0,240,255,0.3);
  z-index: 10;
  white-space: nowrap;
  border-radius: 2px;
}

.jump-current {
  position: absolute;
  bottom: 16px;
  right: 16px;
  z-index: 10;
  display: none;
  background: rgba(0,0,0,0.85);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: inherit;
  font-size: 11px;
  padding: 7px 16px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: 2px;
  transition: all 0.25s;
  box-shadow: 0 0 12px rgba(0,240,255,0.1);
}

.jump-current:hover {
  background: rgba(0,240,255,0.12);
  box-shadow: 0 0 20px rgba(0,240,255,0.25);
  text-shadow: 0 0 8px rgba(0,240,255,0.4);
}

.tooltip .tt-date { color: rgba(200,230,240,0.6); font-size: 10px; }
.tooltip .tt-value { font-size: 16px; font-weight: 700; transition: color 0.3s; }
.tooltip .tt-value.up { color: var(--green); text-shadow: 0 0 8px rgba(0,255,136,0.4); }
.tooltip .tt-value.down { color: #ff4444; text-shadow: 0 0 8px rgba(255,68,68,0.4); }
.tooltip .tt-value.neutral { color: #8899aa; text-shadow: none; }
.tooltip .tt-source { color: rgba(200,230,240,0.3); font-size: 9px; margin-top: 2px; }

.marker-label {
  position: absolute;
  pointer-events: none;
  background: rgba(0,0,0,0.9);
  border: 1px solid var(--green);
  padding: 6px 10px;
  font-size: 12px;
  color: var(--green);
  text-shadow: 0 0 6px rgba(0,255,136,0.3);
  z-index: 10;
  white-space: nowrap;
  border-radius: 2px;
  display: none;
}

.marker-label.up { border-color: var(--green); color: var(--green); text-shadow: 0 0 6px rgba(0,255,136,0.3); }
.marker-label.down { border-color: #ff4444; color: #ff4444; text-shadow: 0 0 6px rgba(255,68,68,0.3); }
.marker-label.neutral { border-color: #556677; color: #8899aa; text-shadow: none; }

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  margin-top: 8px;
  border: 1px solid rgba(0,240,255,0.08);
  background: rgba(0,240,255,0.02);
  border-radius: 4px;
  font-size: 12px;
}

.controls button {
  background: transparent;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: inherit;
  font-size: 12px;
  padding: 8px 20px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: all 0.2s;
  border-radius: 2px;
}

.controls button:hover {
  background: rgba(0,240,255,0.1);
  box-shadow: 0 0 20px rgba(0,240,255,0.2);
  text-shadow: 0 0 8px rgba(0,240,255,0.4);
}

.controls button:active {
  transform: scale(0.98);
}

.controls .info {
  color: rgba(200,230,240,0.4);
  font-size: 11px;
}

.controls .info span {
  color: rgba(200,230,240,0.6);
}

.selected-value-display {
  display: none;
  margin-top: 8px;
  padding: 10px 16px;
  border: 1px solid rgba(0,255,136,0.2);
  background: rgba(0,255,136,0.03);
  border-radius: 4px;
  font-size: 13px;
  color: var(--green);
  text-shadow: 0 0 6px rgba(0,255,136,0.2);
  letter-spacing: 1px;
  transition: border-color 0.3s, color 0.3s;
}

.selected-value-display.up { border-color: rgba(0,255,136,0.4); color: var(--green); text-shadow: 0 0 6px rgba(0,255,136,0.2); }
.selected-value-display.down { border-color: rgba(255,68,68,0.4); color: #ff4444; text-shadow: 0 0 6px rgba(255,68,68,0.2); }
.selected-value-display.neutral { border-color: rgba(85,102,119,0.4); color: #8899aa; text-shadow: none; }

.selected-value-display.visible {
  display: block;
}

@media (max-width: 768px) {
  .container { padding: 8px 10px; }
  .rate-value { font-size: 24px; }
  .rate-display { flex-direction: column; align-items: flex-start; gap: 8px; padding: 14px 16px; }
  .rate-meta { text-align: left; width: 100%; }
  header h1 { font-size: 11px; letter-spacing: 2px; }
  .chart-wrapper canvas { min-height: 250px; }
  .controls { flex-direction: column; gap: 8px; align-items: stretch; text-align: center; }
  .controls .info { font-size: 10px; }
}