/* ==========================================================================
   Executive Shell — portfolio standard v1 (static demo chrome)
   Header + badge row + KPI strip + guided tour overlay + footer.
   Six category palettes selected by data-theme on <html> (default: midnight).
   Dark is the default; each palette has a light variant that the header's
   sun/moon toggle enables (data-scheme="light" on <html>, remembered in
   localStorage). Only colour changes between palettes — type, spacing and
   structure are fixed.
   Every token pair is checked for WCAG AA by contrast-check (mjs/py).
   Zero dependencies.
   ========================================================================== */

/* --- palettes ------------------------------------------------------------- */
/* --primary / --secondary are the palette's two hues; --accent / --accent-2 are
   what components use. data-accent="secondary" on <html> swaps them. */
:root,
[data-theme="midnight"] {
  --bg: #0b1220;
  --panel: #111a2e;
  --panel-2: #16223a;
  --border: #22304d;
  --text: #e6edf3;
  --muted: #9da9c0;
  --primary: #58a6ff;
  --secondary: #d4a95a;
  --ok: #3fb950;
  --warn: #d29922;
  --danger: #f85149;
  --on-accent: #0b1220;
  --chart-1: #58a6ff;
  --chart-2: #d4a95a;
  --chart-3: #3fb950;
  --chart-4: #f85149;
  --chart-5: #d2a8ff;
  --chart-6: #ffa657;
  --chart-7: #79c0ff;
  --chart-8: #f2cc60;
}
[data-theme="signal"] {
  --bg: #0f172a;
  --panel: #16213b;
  --panel-2: #1c2a4a;
  --border: #2a3a5f;
  --text: #e5e9f2;
  --muted: #94a3b8;
  --primary: #818cf8;
  --secondary: #2dd4bf;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #fb7185;
  --on-accent: #0f172a;
  --chart-1: #818cf8;
  --chart-2: #2dd4bf;
  --chart-3: #f472b6;
  --chart-4: #fbbf24;
  --chart-5: #60a5fa;
  --chart-6: #a3e635;
  --chart-7: #fb923c;
  --chart-8: #c4b5fd;
}
[data-theme="graphite"] {
  --bg: #0b0f14;
  --panel: #131a22;
  --panel-2: #1a232e;
  --border: #2a3542;
  --text: #e6e9ee;
  --muted: #98a2b3;
  --primary: #f59e0b;
  --secondary: #a3e635;
  --ok: #a3e635;
  --warn: #f59e0b;
  --danger: #f87171;
  --on-accent: #0b0f14;
  --chart-1: #f59e0b;
  --chart-2: #a3e635;
  --chart-3: #f87171;
  --chart-4: #38bdf8;
  --chart-5: #c084fc;
  --chart-6: #fb923c;
  --chart-7: #34d399;
  --chart-8: #f9a8d4;
}
[data-theme="ember"] {
  --bg: #1a1614;
  --panel: #231e1b;
  --panel-2: #2c2622;
  --border: #3d352f;
  --text: #f1ebe4;
  --muted: #b0a397;
  --primary: #e0b356;
  --secondary: #f4845f;
  --ok: #7cc47f;
  --warn: #e0b356;
  --danger: #f26b6b;
  --on-accent: #1a1614;
  --chart-1: #e0b356;
  --chart-2: #f4845f;
  --chart-3: #7cc47f;
  --chart-4: #6bb1e0;
  --chart-5: #c9a2e6;
  --chart-6: #f2d16b;
  --chart-7: #f9a8d4;
  --chart-8: #9be7ff;
}
[data-theme="plum"] {
  --bg: #1a1024;
  --panel: #241733;
  --panel-2: #2e1f42;
  --border: #433059;
  --text: #f0e9f7;
  --muted: #b3a3c7;
  --primary: #c084fc;
  --secondary: #6ee7b7;
  --ok: #6ee7b7;
  --warn: #fbbf24;
  --danger: #fb7185;
  --on-accent: #1a1024;
  --chart-1: #c084fc;
  --chart-2: #6ee7b7;
  --chart-3: #f9a8d4;
  --chart-4: #fbbf24;
  --chart-5: #7dd3fc;
  --chart-6: #fda4af;
  --chart-7: #fde68a;
  --chart-8: #86efac;
}
[data-theme="forest"] {
  --bg: #0d1b16;
  --panel: #14261f;
  --panel-2: #1b3128;
  --border: #2c463b;
  --text: #e7f0ea;
  --muted: #9fb3a7;
  --primary: #a3e635;
  --secondary: #7dd3fc;
  --ok: #4ade80;
  --warn: #facc15;
  --danger: #f87171;
  --on-accent: #0d1b16;
  --chart-1: #a3e635;
  --chart-2: #7dd3fc;
  --chart-3: #f472b6;
  --chart-4: #facc15;
  --chart-5: #fb923c;
  --chart-6: #c4b5fd;
  --chart-7: #fde68a;
  --chart-8: #f9a8d4;
}
/* Light variants: opt-in through the header toggle (data-scheme="light" on <html>, persisted). */
[data-scheme="light"],
[data-scheme="light"][data-theme="midnight"] {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --panel-2: #eaf0f8;
  --border: #c9d4e3;
  --text: #0b1220;
  --muted: #4a5568;
  --primary: #1d4ed8;
  --secondary: #7a5a20;
  --ok: #166534;
  --warn: #92400e;
  --danger: #b91c1c;
  --on-accent: #ffffff;
  --chart-1: #1d4ed8;
  --chart-2: #7a5a20;
  --chart-3: #15803d;
  --chart-4: #b91c1c;
  --chart-5: #6d28d9;
  --chart-6: #c2410c;
  --chart-7: #0e7490;
  --chart-8: #a16207;
}
[data-scheme="light"][data-theme="signal"] {
  --bg: #f8fafc;
  --panel: #ffffff;
  --panel-2: #eef2ff;
  --border: #cbd5e1;
  --text: #0f172a;
  --muted: #475569;
  --primary: #4f46e5;
  --secondary: #0f766e;
  --ok: #166534;
  --warn: #a34a03;
  --danger: #be123c;
  --on-accent: #ffffff;
  --chart-1: #4f46e5;
  --chart-2: #0f766e;
  --chart-3: #be185d;
  --chart-4: #b45309;
  --chart-5: #1d4ed8;
  --chart-6: #4d7c0f;
  --chart-7: #c2410c;
  --chart-8: #6d28d9;
}
[data-scheme="light"][data-theme="graphite"] {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-2: #eef1f5;
  --border: #cfd6df;
  --text: #0b0f14;
  --muted: #4b5563;
  --primary: #9a4507;
  --secondary: #3f6212;
  --ok: #3f6212;
  --warn: #9a4507;
  --danger: #b91c1c;
  --on-accent: #ffffff;
  --chart-1: #9a4507;
  --chart-2: #3f6212;
  --chart-3: #b91c1c;
  --chart-4: #0369a1;
  --chart-5: #7e22ce;
  --chart-6: #c2410c;
  --chart-7: #047857;
  --chart-8: #9d174d;
}
[data-scheme="light"][data-theme="ember"] {
  --bg: #faf6f1;
  --panel: #ffffff;
  --panel-2: #f3ece3;
  --border: #d9cfc3;
  --text: #1a1614;
  --muted: #5b514a;
  --primary: #8b5e00;
  --secondary: #b3401d;
  --ok: #2f6f3a;
  --warn: #8b5e00;
  --danger: #b3261e;
  --on-accent: #ffffff;
  --chart-1: #8b5e00;
  --chart-2: #b3401d;
  --chart-3: #2f6f3a;
  --chart-4: #1f5f8b;
  --chart-5: #6b3fa0;
  --chart-6: #7a6400;
  --chart-7: #9d174d;
  --chart-8: #0e7490;
}
[data-scheme="light"][data-theme="plum"] {
  --bg: #faf7fd;
  --panel: #ffffff;
  --panel-2: #f1eafa;
  --border: #d6c9e6;
  --text: #1a1024;
  --muted: #5b4b6e;
  --primary: #7e22ce;
  --secondary: #047857;
  --ok: #047857;
  --warn: #a34a03;
  --danger: #be123c;
  --on-accent: #ffffff;
  --chart-1: #7e22ce;
  --chart-2: #047857;
  --chart-3: #be185d;
  --chart-4: #b45309;
  --chart-5: #0369a1;
  --chart-6: #9f1239;
  --chart-7: #a16207;
  --chart-8: #15803d;
}
[data-scheme="light"][data-theme="forest"] {
  --bg: #f5faf7;
  --panel: #ffffff;
  --panel-2: #e9f3ed;
  --border: #c9dccf;
  --text: #0d1b16;
  --muted: #4a5d53;
  --primary: #3f6212;
  --secondary: #0369a1;
  --ok: #166534;
  --warn: #854d0e;
  --danger: #b91c1c;
  --on-accent: #ffffff;
  --chart-1: #3f6212;
  --chart-2: #0369a1;
  --chart-3: #be185d;
  --chart-4: #a16207;
  --chart-5: #c2410c;
  --chart-6: #6d28d9;
  --chart-7: #a16207;
  --chart-8: #9d174d;
}
/* --- derived tokens (never edit per repo) --------------------------------- */
:root {
  --accent: var(--primary);
  --accent-2: var(--secondary);
  --accent-hover: color-mix(in srgb, var(--accent) 82%, var(--text));
  --accent-glow: color-mix(in srgb, var(--accent) 45%, transparent);
  --header-fade: color-mix(in srgb, var(--panel) 94%, transparent);
  --backdrop: color-mix(in srgb, var(--bg) 72%, transparent);
  --btn-hover: color-mix(in srgb, var(--panel-2) 80%, var(--accent));
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.55);

  --radius: 10px;
  --radius-sm: 6px;
  --gutter: 16px;
  --shell-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --shell-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  --shell-speed: 180ms;
  --shell-z-tour: 9000;
}

[data-accent="secondary"] {
  --accent: var(--secondary);
  --accent-2: var(--primary);
}

[data-scheme="light"] {
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.18);
}

/* --- base ---------------------------------------------------------------- */

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

html {
  color-scheme: dark;
}

html[data-scheme="light"] {
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--shell-font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--accent);
}

:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.exec-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.exec-skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: calc(var(--shell-z-tour) + 10);
  padding: 10px 16px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top var(--shell-speed) ease;
}

.exec-skip-link:focus {
  top: var(--gutter);
}

/* --- header -------------------------------------------------------------- */

.exec-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background-color: var(--panel);
  background-image: linear-gradient(180deg, var(--panel) 0%, var(--header-fade) 100%);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.exec-header__inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px 20px;
}

.exec-header__identity {
  flex: 1 1 320px;
  min-width: 0;
}

.exec-header__title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  line-height: 1.3;
}

.exec-header__tagline {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
  max-width: 78ch;
}

.exec-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.exec-badges__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.exec-badges__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  flex: none;
}

.exec-badges__item--accent {
  color: var(--accent);
  border-color: var(--accent-glow);
}

.exec-header__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

/* --- buttons ------------------------------------------------------------- */

.exec-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--shell-speed) ease, border-color var(--shell-speed) ease;
}

.exec-btn:hover {
  background: var(--btn-hover);
  border-color: var(--accent);
}

.exec-btn--icon {
  padding: 9px 10px;
  line-height: 0;
}

.exec-btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.exec-btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* --- KPI strip ----------------------------------------------------------- */

.exec-kpis {
  max-width: 1320px;
  margin: 0 auto;
  padding: 16px var(--gutter) 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
}

.exec-kpi {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  min-width: 0;
}

.exec-kpi__value {
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.exec-kpi__label {
  margin-top: 4px;
  font-size: 0.72rem;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--muted);
}

.exec-kpi--ok .exec-kpi__value {
  color: var(--ok);
}
.exec-kpi--warn .exec-kpi__value {
  color: var(--warn);
}
.exec-kpi--danger .exec-kpi__value {
  color: var(--danger);
}
.exec-kpi--accent .exec-kpi__value {
  color: var(--accent);
}

/* --- main region --------------------------------------------------------- */

.exec-main {
  max-width: 1320px;
  margin: 0 auto;
  padding: 20px var(--gutter) 40px;
}

/* --- tour ---------------------------------------------------------------- */

.exec-tour-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--shell-z-tour);
  background: var(--backdrop);
}

.exec-tour-backdrop[hidden] {
  display: none;
}

.exec-tour-spot {
  position: absolute;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: 0 0 0 9999px var(--backdrop), 0 0 22px var(--accent-glow);
  pointer-events: none;
  transition: all var(--shell-speed) ease;
}

.exec-tour-card {
  position: absolute;
  width: min(360px, calc(100vw - 2 * var(--gutter)));
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.exec-tour-card__step {
  font-size: 0.7rem;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.exec-tour-card__title {
  margin: 6px 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
}

.exec-tour-card__body {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.exec-tour-card__nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
}

.exec-tour-card__nav .exec-tour-card__spacer {
  flex: 1;
}

.exec-tour-card__hint {
  margin: 10px 0 0;
  font-size: 0.72rem;
  color: var(--muted);
}

.exec-tour-card__hint kbd {
  font-family: var(--shell-mono);
  font-size: 0.7rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
}

/* --- footer -------------------------------------------------------------- */

.exec-footer {
  border-top: 1px solid var(--border);
  background: var(--panel);
  margin-top: 40px;
}

.exec-footer__inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.84rem;
}

.exec-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* --- responsive ---------------------------------------------------------- */

@media (max-width: 720px) {
  .exec-header__inner {
    flex-direction: column;
    align-items: stretch;
  }

  .exec-header__actions {
    width: 100%;
  }

  .exec-header__actions .exec-btn {
    flex: 1 1 auto;
    justify-content: center;
  }

  .exec-kpi__value {
    font-size: 1.4rem;
  }
}

/* --- motion preferences -------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- forced colors ------------------------------------------------------- */

@media (forced-colors: active) {
  .exec-tour-spot {
    outline: 3px solid Highlight;
    box-shadow: none;
  }
  .exec-btn {
    border: 1px solid ButtonText;
  }
}

}

/* The tour card never runs past the viewport: it scrolls inside, and Back / Next stay reachable. */
.exec-tour-card {
  max-height: calc(100vh - 24px);
  max-height: calc(100dvh - 24px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.exec-tour-card__nav {
  position: sticky;
  bottom: -18px;
  padding-bottom: 2px;
  background: inherit;
}