:root {
  /* Light theme (default) */
  --bg-base: #ffffff;
  --bg-surface: #f8f9fa;
  --bg-raised: #eef0f4;
  --bg-elev-top: #ffffff;
  --bg-elev-bot: #fafbfc;
  --border: #e0e3eb;
  --border-strong: #c8ccd4;
  --text-primary: #131722;
  --text-secondary: #5a5d65;
  --text-muted: #9da0a8;
  --bull: #089981;
  --bull-soft: rgba(8, 153, 129, 0.10);
  --bull-glow: rgba(8, 153, 129, 0.35);
  --bull-status-border: rgba(8, 153, 129, 0.28);
  --bear: #f23645;
  --bear-soft: rgba(242, 54, 69, 0.10);
  --bear-glow: rgba(242, 54, 69, 0.35);
  --accent: #2962ff;
  --accent-soft: rgba(41, 98, 255, 0.10);
  --grid-line: rgba(0, 0, 0, 0.045);
  --nav-bg: rgba(255, 255, 255, 0.78);
  --radial-glow: rgba(8, 153, 129, 0.05);
  --card-shadow: 0 24px 60px rgba(15, 23, 42, 0.08), 0 1px 0 rgba(255, 255, 255, 0.6) inset;

  color-scheme: light;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

:root[data-theme="dark"] {
  --bg-base: #0a0a0a;
  --bg-surface: #111111;
  --bg-raised: #1a1a1a;
  --bg-elev-top: #0d0d0d;
  --bg-elev-bot: #0a0a0a;
  --border: #222222;
  --border-strong: #2d2d2d;
  --text-primary: #e6e6e6;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --bull: #3fb950;
  --bull-soft: rgba(63, 185, 80, 0.12);
  --bull-glow: rgba(63, 185, 80, 0.40);
  --bull-status-border: rgba(63, 185, 80, 0.25);
  --bear: #f85149;
  --bear-soft: rgba(248, 81, 73, 0.12);
  --bear-glow: rgba(248, 81, 73, 0.40);
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.12);
  --grid-line: rgba(255, 255, 255, 0.018);
  --nav-bg: rgba(10, 10, 10, 0.70);
  --radial-glow: rgba(63, 185, 80, 0.06);
  --card-shadow: 0 1px 0 rgba(255, 255, 255, 0.02) inset, 0 30px 80px rgba(0, 0, 0, 0.5);

  color-scheme: dark;
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01';
  min-height: 100vh;
}

body {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ─── Top nav ──────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 2;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 20px;
  height: 20px;
  position: relative;
}

.brand-mark::before,
.brand-mark::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 1px;
}

.brand-mark::before {
  top: 4px;
  background: var(--bear);
  box-shadow: 0 0 8px var(--bear-glow);
}

.brand-mark::after {
  bottom: 4px;
  background: var(--bull);
  box-shadow: 0 0 8px var(--bull-glow);
}

.brand-mark span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 14px;
  background: var(--text-primary);
  transform: translate(-50%, -50%);
}

.nav-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-left: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--bg-raised);
}
.theme-toggle:active { transform: scale(0.96); }
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.theme-toggle .theme-icon { display: none; }
:root .theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.nav-meta .dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--bull);
  margin-right: 6px;
  box-shadow: 0 0 6px var(--bull);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ─── Hero ─────────────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 80px;
  align-items: center;
  padding: 80px 40px 60px;
  max-width: 1320px;
  margin: 0 auto;
  min-height: calc(100vh - 64px);
}

.hero-copy { max-width: 540px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 28px;
  padding: 6px 12px 6px 10px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
}

.eyebrow .dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--bull);
  box-shadow: 0 0 6px var(--bull);
  animation: pulse 2s infinite ease-in-out;
}

h1 {
  font-size: clamp(40px, 5.4vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0 0 24px;
  color: var(--text-primary);
}

h1 .bull-text { color: var(--bull); }
h1 .bear-text { color: var(--bear); }

.lede {
  font-size: 17px;
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0 0 40px;
  max-width: 480px;
}

.cta-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.g-signin-wrap {
  min-height: 44px;
}

.cta-foot {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.hero-meta {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 36px;
  max-width: 480px;
}

.hero-meta .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-meta .stat-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.hero-meta .stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ─── Chart preview ────────────────────────────────────────── */
.chart-card {
  position: relative;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-elev-top) 0%, var(--bg-elev-bot) 100%);
  padding: 0;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.chart-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 50%, var(--radial-glow), transparent 60%);
  pointer-events: none;
}

.chart-tape {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  position: relative;
  z-index: 1;
}

.tape-sym { color: var(--text-primary); font-weight: 500; }
.tape-tf {
  color: var(--text-secondary);
  padding: 2px 8px;
  border: 1px solid var(--border);
  font-size: 10px;
  letter-spacing: 0.06em;
}
.tape-price { color: var(--text-primary); font-weight: 500; }
.tape-change.positive { color: var(--bull); }
.tape-change.negative { color: var(--bear); }
.tape-state {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--bull);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.tape-state .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--bull);
  box-shadow: 0 0 6px var(--bull);
  animation: pulse 2s infinite ease-in-out;
}

.chart-svg-wrap {
  position: relative;
  padding: 20px 8px 12px;
  z-index: 1;
}

.chart-svg-wrap svg { display: block; width: 100%; height: auto; }

/* Animation: AlphaLine path "draws in" */
.alpha-line-bear,
.alpha-line-bull {
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  stroke-width: 1.8;
  filter: drop-shadow(0 0 4px currentColor);
}
.alpha-line-bear { color: var(--bear); stroke: var(--bear); }
.alpha-line-bull { color: var(--bull); stroke: var(--bull); }

.alpha-line-bear,
.alpha-line-bull {
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  animation: drawLine 2.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.alpha-line-bull { animation-delay: 1.6s; }

@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}

.flip-marker {
  opacity: 0;
  animation: fadeIn 0.5s ease 3.6s forwards;
}

.price-dot {
  fill: var(--bull);
  filter: drop-shadow(0 0 6px var(--bull));
  opacity: 0;
  animation: fadeIn 0.4s ease 4s forwards, dotPulse 2s ease 4s infinite;
}

@keyframes fadeIn { to { opacity: 1; } }
@keyframes dotPulse {
  0%, 100% { r: 4; opacity: 1; }
  50% { r: 5.5; opacity: 0.7; }
}

.chart-axis-label {
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--text-muted);
  letter-spacing: 0.04em;
}

.chart-grid line { stroke: var(--border); stroke-width: 0.5; }

.chart-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px 14px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

.chart-foot .legend {
  display: flex;
  align-items: center;
  gap: 16px;
}

.chart-foot .legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.chart-foot .legend-swatch {
  width: 10px;
  height: 2px;
  border-radius: 1px;
}
.swatch-bear { background: var(--bear); box-shadow: 0 0 4px var(--bear); }
.swatch-bull { background: var(--bull); box-shadow: 0 0 4px var(--bull); }

/* ─── Footer ───────────────────────────────────────────────── */
.foot {
  border-top: 1px solid var(--border);
  padding: 22px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.foot-disclaimer { max-width: 480px; line-height: 1.5; }

/* ─── Dashboard ────────────────────────────────────────────── */
.dash-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 64px);
  padding: 40px;
}

.dash-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 40px;
  position: relative;
  box-shadow: var(--card-shadow);
}

.dash-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--bull), transparent);
  opacity: 0.6;
}

.dash-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.dash-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  margin-bottom: 20px;
  background: var(--bg-raised);
  object-fit: cover;
}

.dash-name {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  color: var(--text-primary);
}

.dash-email {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.dash-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bull-soft);
  border: 1px solid var(--bull-status-border);
  color: var(--bull);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.dash-status .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--bull);
  box-shadow: 0 0 6px var(--bull);
  animation: pulse 2s infinite ease-in-out;
}

.dash-actions {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  letter-spacing: -0.005em;
  border: 1px solid var(--border-strong);
  background: var(--bg-raised);
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  background: #222;
  border-color: #383838;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-base);
  border-color: var(--text-primary);
  flex: 1;
}

.btn-primary:hover {
  background: #fff;
  border-color: #fff;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn:disabled:hover {
  background: var(--bg-raised);
  border-color: var(--border-strong);
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 48px 24px 48px;
  }
  .nav { padding: 18px 24px; }
  .foot { padding: 22px 24px; flex-direction: column; gap: 14px; align-items: flex-start; }
  .hero-meta { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

@media (max-width: 560px) {
  h1 { font-size: 36px; }
  .lede { font-size: 15px; }
  .nav-meta { gap: 14px; font-size: 10px; }
  .nav-meta .meta-item:nth-child(2) { display: none; }
  .chart-tape { gap: 10px; padding: 12px 14px; flex-wrap: wrap; }
  .tape-state { margin-left: 0; width: 100%; }
  .hero-meta { gap: 12px; }
  .hero-meta .stat-value { font-size: 15px; }
}