:root {
  --bg: #0f1115;
  --bg-elevated: #161923;
  --border: #262b38;
  --text: #e6e8ef;
  --text-dim: #9098ab;
  --accent: #5eead4;
  --up: #4ade80;
  --down: #f87171;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}
.brand .dot {
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.95rem;
}
.site-nav a {
  color: var(--text-dim);
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--accent);
  text-decoration: none;
}

main {
  flex: 1;
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 0.4rem;
}
.hero p.lede {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 60ch;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(94, 234, 212, 0.1);
  border: 1px solid rgba(94, 234, 212, 0.3);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  margin-bottom: 1rem;
}

.callout {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  margin: 1.75rem 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.callout strong {
  color: var(--text);
}

.cta-row {
  margin-top: 1.75rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border);
}
.btn.primary {
  background: var(--accent);
  color: #06251f;
  border-color: var(--accent);
}
.btn.primary:hover {
  text-decoration: none;
  opacity: 0.9;
}
.btn.secondary {
  color: var(--text);
}
.btn.secondary:hover {
  text-decoration: none;
  border-color: var(--accent);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
}
.feature-list li {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}
.feature-list li strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.2rem;
}

h2 {
  margin-top: 2.2rem;
  font-size: 1.3rem;
}

.status-line {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.dot-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  display: inline-block;
}
.dot-indicator.live {
  background: var(--up);
  box-shadow: 0 0 6px var(--up);
}
.dot-indicator.down {
  background: var(--down);
}

.ticker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 0.9rem;
}

.ticker-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  transition: background-color 0.4s ease, border-color 0.4s ease;
}

.ticker-card .symbol {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.ticker-card .name {
  color: var(--text-dim);
  font-size: 0.8rem;
  margin: 0.15rem 0 0.6rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ticker-card .price {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
}

.ticker-card .change {
  font-family: var(--mono);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}
.change.up {
  color: var(--up);
}
.change.down {
  color: var(--down);
}
.change.flat {
  color: var(--text-dim);
}

.flash-up {
  animation: flashUp 0.7s ease;
}
.flash-down {
  animation: flashDown 0.7s ease;
}
@keyframes flashUp {
  0% { background-color: rgba(74, 222, 128, 0.25); border-color: var(--up); }
  100% { background-color: var(--bg-elevated); }
}
@keyframes flashDown {
  0% { background-color: rgba(248, 113, 113, 0.25); border-color: var(--down); }
  100% { background-color: var(--bg-elevated); }
}

.symbol-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.symbol-picker label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  cursor: pointer;
  user-select: none;
}
.symbol-picker input {
  accent-color: var(--accent);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
}
.site-footer .disclaimer {
  max-width: 60ch;
  margin: 0 auto 0.35rem;
}

.error-page {
  text-align: center;
  padding: 3rem 1rem;
}
.error-page h1 {
  font-size: 4rem;
  margin: 0;
  color: var(--accent);
}