* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.viz-root {
  color-scheme: light;
  --page:           #f9f9f7;
  --surface-1:      #fcfcfb;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --muted:          #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11,11,11,0.10);
  --good:           #006300;
  --bad:            #d03b3b;

  --series-1:       #eb6834; /* primary accent + net worth line */
  --series-1-wash:  rgba(235,104,52,0.10);
  --series-2:       #2a78d6; /* baseline line */

  background: var(--page);
  color: var(--text-primary);
  min-height: 100vh;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) .viz-root {
    color-scheme: dark;
    --page:           #0d0d0d;
    --surface-1:      #1a1a19;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --muted:          #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255,255,255,0.10);
    --good:           #0ca30c;
    --bad:            #e66767;

    --series-1:       #d95926;
    --series-1-wash:  rgba(217,89,38,0.14);
    --series-2:       #3987e5;
  }
}
:root[data-theme="dark"] .viz-root {
  color-scheme: dark;
  --page:           #0d0d0d;
  --surface-1:      #1a1a19;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --muted:          #898781;
  --gridline:       #2c2c2a;
  --baseline:       #383835;
  --border:         rgba(255,255,255,0.10);
  --good:           #0ca30c;
  --bad:            #e66767;

  --series-1:       #d95926;
  --series-1-wash:  rgba(217,89,38,0.14);
  --series-2:       #3987e5;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  max-width: 1120px;
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; text-decoration: none; color: inherit; }
.brand-mark { color: var(--series-1); font-size: 14px; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  cursor: pointer;
}
.theme-toggle:hover { color: var(--text-primary); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}