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

:root {
  --bg:      #0d0f14;
  --surface: #151820;
  --border:  #252a35;
  --text:    #e2e8f0;
  --muted:   #8896a8;
  --accent:  #4f8ef7;
  --green:   #34d399;
  --radius:  12px;
  --gap:     1.75rem;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none;
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

header {
  text-align: center;
  padding: 2.75rem 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}
header h1 {
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
header h1 span { color: var(--accent); }
.subtitle {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.88rem;
}
.subtitle-secondary { color: var(--muted); }

main {
  max-width: 880px;
  margin: 0 auto;
  padding: var(--gap) 1rem 3.5rem;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.tezaur-card { border-top: 2px solid var(--green); }
.fidelis-card { border-top: 2px solid var(--accent); }

.card-header {
  padding: 1rem 1.25rem 0.85rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.tezaur-card .dot { background: var(--green); box-shadow: 0 0 7px var(--green); }
.fidelis-card .dot { background: var(--accent); box-shadow: 0 0 7px var(--accent); }

.card-header h2 {
  font-size: 0.97rem;
  font-weight: 600;
}
.badge {
  margin-left: auto;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.17rem 0.5rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  color: var(--muted);
  white-space: nowrap;
}

.rates-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.5rem;
  padding: 0.6rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.strip-date {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-right: 0.25rem;
  white-space: nowrap;
}
.rate-pill {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  white-space: nowrap;
}
.rate-pill .pill-label {
  color: var(--muted);
  font-weight: 400;
}
.rate-pill .pill-value {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.tab-bar {
  display: flex;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem 0;
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.28rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn[aria-selected="true"] {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(79,142,247,0.1);
}

.chart-panel { display: none; min-height: 340px; }
.chart-panel.active { display: block; }

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.75rem;
  padding: 0.6rem 1rem 0.5rem;
  border-bottom: 1px solid var(--border);
  role: group;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  color: #9aa;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.15rem 0.25rem;
  min-height: 24px;
  border-radius: 4px;
  transition: opacity 0.15s, color 0.15s;
}
.legend-item:hover { color: var(--text); }
.legend-item[aria-pressed="false"] { opacity: 0.3; }
.legend-swatch {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.chart-outer {
  position: relative;
}
.chart-outer::after {
  content: '';
  position: absolute;
  bottom: 0; right: 0;
  width: 40px;
  height: calc(100% - var(--legend-h, 40px));
  background: linear-gradient(to right, transparent, var(--surface));
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.2s;
}
.chart-outer.scrolled-end::after { opacity: 0; }

.chart-wrap {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  tabindex: 0;
}
.chart-wrap:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.chart-wrap::-webkit-scrollbar { height: 4px; }
.chart-wrap::-webkit-scrollbar-track { background: transparent; }
.chart-wrap::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.chart-wrap canvas {
  display: block;
}

.chart-skeleton {
  height: 300px;
  display: flex;
  align-items: flex-end;
  gap: 6px;
  padding: 1.5rem 1rem 2rem;
}
.chart-skeleton.hidden { display: none; }
.skel-bar {
  flex: 1;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.07) 0%, rgba(255,255,255,0.03) 100%);
  animation: skel-pulse 1.4s ease-in-out infinite;
}
@keyframes skel-pulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1; }
}

footer {
  text-align: center;
  padding: 1.25rem 1rem 2.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 2;
}
footer a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
footer a:hover { text-decoration-thickness: 2px; }

.did-you-know {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.dyk-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.dyk-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.dyk-shuffle {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.dyk-shuffle:hover { color: var(--text); border-color: var(--accent); }
.dyk-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
@media (max-width: 600px) {
  .dyk-cards { grid-template-columns: 1fr; }
}
.dyk-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.dyk-card-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  line-height: 1.3;
}
.dyk-card-body {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.55;
}