:root {
  --panel: #ffffff;
  --ink: #181127;
  --muted: #655c7f;
  --accent: #e85ab3;
  --accent-2: #5a2ac7;
  --accent-3: #3a56f0;
  --accent-deep: #1f1d57;
  --body-bg: #ffffff;

  --header-bg: linear-gradient(90deg, #ffffff, #faf7ff);
  --header-border: #ece6fb;

  --panel-border: #e2eaf4;
  --panel-shadow: 0 14px 34px #1334671c;
  --section-head-border: #e4edf8;
  --section-head-bg: linear-gradient(180deg, #ffffff, #f8fbff);

  --select-border: #b9c8d2;
  --select-text: #1d2f36;
  --select-bg: #ffffff;

  --footer-bg: #1f1d57;
  --footer-text: #ffffff;
  --footer-copy: #f6edff;
  --footer-chip-border: #ffffff5c;
  --footer-chip-hover: #ffffff1f;
  --footer-link-hover: #f7b9dc;

  --toggle-bg: #f2e9fd;
  --toggle-border: #d2c0ef;
  --toggle-knob: #ffffff;
  --toggle-icon: #5a2ac7;
  --focus-ring: #8d79dc;

  --chart-bg: #f8f4ff;
  --chart-grid: #dccff1;
  --chart-frame: #8e7fb6;
  --chart-label: #1f1d57;
  --trail-rgb: 232, 90, 179;
  --live-point: #5a2ac7;
  --zone-label: #1f1d57;
  --status-error: #b3261e;
}

body[data-theme="dark"] {
  --panel: #171329;
  --ink: #f0ebff;
  --muted: #c6bbdf;
  --body-bg: #0f0d18;

  --header-bg: linear-gradient(90deg, #171329, #211a35);
  --header-border: #2f2650;

  --panel-border: #2f2650;
  --panel-shadow: 0 14px 34px #00000066;
  --section-head-border: #2f2650;
  --section-head-bg: linear-gradient(180deg, #1a1630, #161227);

  --select-border: #4a3a75;
  --select-text: #f0ebff;
  --select-bg: #1f1a36;

  --footer-bg: #0e0c18;
  --footer-text: #f5efff;
  --footer-copy: #d7caef;
  --footer-chip-border: #c7b7eb5f;
  --footer-chip-hover: #ffffff22;
  --footer-link-hover: #ff9ed4;

  --toggle-bg: #2b2250;
  --toggle-border: #4d3f7e;
  --toggle-knob: #efe8ff;
  --toggle-icon: #f6efff;
  --focus-ring: #a895ef;

  --chart-bg: #1b1730;
  --chart-grid: #3a315e;
  --chart-frame: #7f71b3;
  --chart-label: #eee6ff;
  --trail-rgb: 255, 130, 199;
  --live-point: #b493ff;
  --zone-label: #eee6ff;
  --status-error: #ff8f8f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--body-bg);
  display: flex;
  flex-direction: column;
  transition: background-color 140ms ease, color 140ms ease;
}

.site-header {
  width: 100%;
  border-bottom: 1px solid var(--header-border);
  background: var(--header-bg);
}

.site-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0.8rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.site-brand {
  margin: 0;
  line-height: 1;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.58rem;
}

.brand-text {
  display: grid;
  gap: 0.18rem;
}

.brand-logo {
  width: 38px;
  height: 38px;
  display: inline-flex;
  flex: 0 0 auto;
}

.brand-logo img {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 14px;
}

.brand-wordmark {
  font-size: 2.05rem;
  letter-spacing: 0;
  white-space: nowrap;
  background: linear-gradient(90deg, var(--accent), var(--accent-2) 52%, var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-subtitle {
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--accent-deep);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.site-nav a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 1.2rem 1rem 2rem;
}

.page-shell main > header :is(h1, h2, h3),
.page-shell section > header :is(h1, h2, h3) {
  background: linear-gradient(90deg, var(--accent-3), var(--accent-2) 52%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.site-footer {
  margin-top: auto;
  width: 100%;
  background: var(--footer-bg);
  color: var(--footer-text);
}

.footer-inner {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 1.25rem 1rem 1.35rem;
  text-align: center;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
}

.footer-social a {
  color: var(--footer-text);
  text-decoration: none;
  border: 1px solid var(--footer-chip-border);
  border-radius: 999px;
  padding: 0.33rem 0.72rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.footer-social a:hover {
  background: var(--footer-chip-hover);
}

.footer-copy {
  margin: 0;
  font-size: 0.9rem;
  color: var(--footer-copy);
}

.footer-copy a,
.footer-copy a:link,
.footer-copy a:visited {
  color: var(--footer-text);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 2px;
  font-weight: 700;
}

.footer-copy a:hover,
.footer-copy a:focus-visible {
  color: var(--footer-link-hover);
}

select {
  border: 1px solid var(--select-border);
  border-radius: 10px;
  padding: 0.56rem 0.72rem;
  font: inherit;
  color: var(--select-text);
  background: var(--select-bg);
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.62rem 0.9rem;
  cursor: pointer;
  font: inherit;
  color: #fff;
  background: linear-gradient(90deg, var(--accent-2), var(--accent-3));
  transition: transform 120ms ease, filter 120ms ease;
}

button:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.secondary {
  background: linear-gradient(90deg, #302779, var(--accent-deep));
}

.theme-toggle {
  min-width: 74px;
  height: 38px;
  border: 1px solid var(--toggle-border);
  border-radius: 999px;
  background: var(--toggle-bg);
  padding: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
}

.theme-toggle:hover {
  transform: none;
  filter: brightness(1.02);
}

.theme-toggle::before {
  content: "\2600";
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--toggle-knob);
  color: var(--toggle-icon);
  font-size: 15px;
  transform: translateX(0);
  transition: transform 180ms ease, color 180ms ease;
}

body[data-theme="dark"] .theme-toggle::before {
  content: "\263e";
  transform: translateX(34px);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

@media (max-width: 720px) {
  .brand-wordmark {
    font-size: 1.46rem;
    letter-spacing: 0;
  }

  .brand-subtitle {
    font-size: 0.68rem;
  }

  .brand-logo {
    width: 30px;
    height: 30px;
  }

  .site-inner {
    align-items: center;
  }
}