/* ---------------------------------------------------------------------- */
/* Turtle Quant 1 docs — "Aurora Glass" theme                                    */
/*                                                                         */
/* Design system (ui-ux-pro-max): Glassmorphism + Aurora UI + Bento grid.  */
/* A slow-moving green/teal/cyan aurora sits behind everything; the    */
/* header, sidebars, article, cards and code blocks are frosted-glass      */
/* panels (backdrop blur + hairline border + inner highlight) floating on  */
/* top of it. Text contrast is kept >= 4.5:1 by using fairly opaque glass  */
/* under body copy.                                                        */
/* ---------------------------------------------------------------------- */

:root {
  --tq-green: #22c55e;
  --tq-green-bright: #4ade80;
  --tq-green-dim: #15803d;
  --tq-teal: #14b8a6;
  --tq-cyan: #22d3ee;

  --glass-blur: 18px;
  --glass-radius: 20px;
  --tq-radius: 12px;
  --tq-ease: 220ms cubic-bezier(0.2, 0, 0, 1);
}

html {
  scroll-behavior: smooth;
}

/* ----- Palette --------------------------------------------------------- */

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #040b09;
  --md-default-fg-color: #e8f3ec;
  --md-default-fg-color--light: #b6cfc2;
  --md-default-fg-color--lighter: #86a595;
  --md-default-fg-color--lightest: rgba(255, 255, 255, 0.08);

  --md-primary-fg-color: #0a1512;
  --md-primary-bg-color: #effaf3;

  --md-accent-fg-color: var(--tq-green-bright);
  --md-accent-fg-color--transparent: rgba(74, 222, 128, 0.12);
  --md-typeset-a-color: var(--tq-green-bright);

  --md-code-bg-color: rgba(0, 0, 0, 0.38);
  --md-code-fg-color: #d6ebe0;

  --md-footer-bg-color: transparent;
  --md-footer-bg-color--dark: transparent;
  --md-footer-fg-color: var(--md-default-fg-color);
  --md-footer-fg-color--light: var(--md-default-fg-color--light);
  --md-footer-fg-color--lighter: var(--md-default-fg-color--lighter);

  /* glass tokens */
  --glass-bg: rgba(255, 255, 255, 0.055);
  --glass-bg-strong: rgba(8, 22, 18, 0.5);
  --glass-border: rgba(255, 255, 255, 0.11);
  --glass-highlight: rgba(255, 255, 255, 0.14);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --tq-border: rgba(74, 222, 128, 0.2);
  --aurora-a: rgba(34, 197, 94, 0.7);
  --aurora-b: rgba(20, 184, 166, 0.6);
  --aurora-c: rgba(34, 211, 238, 0.4);
  --aurora-d: rgba(163, 230, 53, 0.28);
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: #eef8f2;
  --md-default-fg-color: #0e2a1e;
  --md-default-fg-color--light: #35574a;
  --md-default-fg-color--lighter: #587868;
  --md-default-fg-color--lightest: rgba(14, 42, 30, 0.09);

  --md-primary-fg-color: #0a1512;
  --md-primary-bg-color: #effaf3;

  --md-accent-fg-color: var(--tq-green-dim);
  --md-accent-fg-color--transparent: rgba(21, 128, 61, 0.09);
  --md-typeset-a-color: #166534;

  --md-code-bg-color: rgba(14, 42, 30, 0.06);
  --md-code-fg-color: #173528;

  --md-footer-bg-color: transparent;
  --md-footer-bg-color--dark: transparent;
  --md-footer-fg-color: var(--md-default-fg-color);
  --md-footer-fg-color--light: var(--md-default-fg-color--light);
  --md-footer-fg-color--lighter: var(--md-default-fg-color--lighter);

  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-highlight: rgba(255, 255, 255, 0.9);
  --glass-shadow: 0 8px 32px rgba(15, 80, 50, 0.12);
  --tq-border: rgba(21, 128, 61, 0.2);
  --aurora-a: rgba(74, 222, 128, 0.7);
  --aurora-b: rgba(45, 212, 191, 0.55);
  --aurora-c: rgba(103, 232, 249, 0.55);
  --aurora-d: rgba(190, 242, 100, 0.4);
}

/* ----- Aurora backdrop ------------------------------------------------- */

body {
  background-color: var(--md-default-bg-color);
}

body::before {
  content: "";
  position: fixed;
  inset: -20vmax;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(38vmax 30vmax at 12% 28%, var(--aurora-a), transparent 70%),
    radial-gradient(36vmax 30vmax at 88% 18%, var(--aurora-b), transparent 70%),
    radial-gradient(40vmax 32vmax at 70% 85%, var(--aurora-c), transparent 70%),
    radial-gradient(34vmax 28vmax at 20% 90%, var(--aurora-d), transparent 70%),
    radial-gradient(30vmax 24vmax at 50% 50%, var(--aurora-b), transparent 75%);
  animation: aurora-drift 28s ease-in-out infinite alternate;
  will-change: transform;
}

@keyframes aurora-drift {
  from { transform: translate3d(0, 0, 0) rotate(0deg) scale(1); }
  to   { transform: translate3d(3vmax, -2vmax, 0) rotate(6deg) scale(1.08); }
}

/* Let the aurora show through Material's containers */
.md-main,
.md-container,
.md-content {
  background: transparent;
}

/* ----- Glass mixin (applied via a shared selector list) ------------------ */

.md-header,
.md-tabs,
.md-content__inner,
.tq-card,
.md-typeset .admonition,
.md-typeset details,
.md-typeset .highlight,
.md-typeset table:not([class]),
.md-search__form,
.md-search__output {
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
}

/* ----- Header + tabs: one floating glass bar ----------------------------- */

.md-header,
.md-tabs {
  background: var(--glass-bg-strong);
  color: var(--md-default-fg-color);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: none;
}

.md-header {
  box-shadow: 0 1px 0 var(--glass-highlight) inset, var(--glass-shadow);
}

.md-tabs {
  border-bottom: 1px solid var(--glass-border);
}

.md-header__title,
.md-header__button,
.md-header .md-icon,
.md-tabs__link,
.md-search__icon,
.md-header__option {
  color: var(--md-default-fg-color);
}

.md-tabs__link {
  opacity: 0.7;
  transition: opacity var(--tq-ease), color var(--tq-ease);
}

.md-tabs__link:hover,
.md-tabs__link--active {
  opacity: 1;
  color: var(--md-accent-fg-color);
}

.md-header__button.md-logo img {
  filter: drop-shadow(0 0 8px rgba(34, 197, 94, 0.6));
}

.md-search__form {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  transition: border-color var(--tq-ease), background var(--tq-ease);
}

.md-search__form:hover,
.md-search__form:focus-within {
  border-color: var(--tq-border);
  background: var(--glass-bg-strong);
}

.md-search__input,
.md-search__input::placeholder {
  color: var(--md-default-fg-color--light);
}

.md-search__output {
  border-radius: 0 0 var(--glass-radius) var(--glass-radius);
}

/* ----- Article as a glass sheet ----------------------------------------- */

.md-content__inner {
  margin: 1.5rem 0.8rem 3rem;
  padding: 1.5rem 2rem 2.5rem;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
  box-shadow: 0 1px 0 var(--glass-highlight) inset, var(--glass-shadow);
}

.md-content__inner::before {
  display: none; /* Material's spacer */
}

/* The home page is a full-bleed hero: no sheet */
.md-content__inner:has(.tq-hero) {
  background: none;
  border: 0;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  padding: 0;
  margin: 0 0.8rem 3rem;
}

/* ----- Sidebars: nav + TOC as quiet glass rails -------------------------- */

@media screen and (min-width: 76.25em) {
  .md-sidebar--primary .md-sidebar__scrollwrap,
  .md-sidebar--secondary .md-sidebar__scrollwrap {
    margin-top: 1.5rem;
    padding: 0.6rem 0.4rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--glass-radius);
    -webkit-backdrop-filter: blur(var(--glass-blur));
    backdrop-filter: blur(var(--glass-blur));
    max-height: calc(100vh - 11rem);
    height: auto !important;
  }

  .md-sidebar--primary,
  .md-sidebar--secondary {
    height: auto !important;
  }
}

/* Material paints opaque title/fade backgrounds that read as black boxes on glass */
.md-sidebar label.md-nav__link {
  box-shadow: none !important;
  background: none !important;
}

.md-sidebar label.md-nav__link--active {
  box-shadow: none !important;
  background: var(--md-accent-fg-color--transparent) !important;
}

/* Material pins several different elements to the top of a scrolling nav
   panel (the section .md-nav__title, and - when navigation.sections lifts
   an active section whose own entry has no children to list below it -
   the active item's .md-nav__link itself) and gives each one a halo sized
   to the page background so scrolled content doesn't show through. On our
   translucent glass sidebar that halo is opaque and reads as a solid
   black box, so every sticky variant needs it stripped. */
.md-sidebar .md-nav__title,
.md-sidebar .md-nav__title[for],
.md-sidebar .md-nav--secondary .md-nav__title,
.md-sidebar .md-nav--primary > .md-nav__title,
.md-sidebar .md-nav--lifted > .md-nav__list > .md-nav__item--active > .md-nav__link {
  background: none !important;
  box-shadow: none !important;
}

.md-nav__title::after,
.md-sidebar__scrollwrap::after {
  display: none;
}

.md-nav__link {
  border-radius: 8px;
  padding: 0.25rem 0.5rem;
  transition: color var(--tq-ease), background var(--tq-ease);
}

.md-nav__link:hover {
  background: var(--md-accent-fg-color--transparent);
}

.md-nav__item .md-nav__link--active {
  font-weight: 600;
  color: var(--md-accent-fg-color);
  background: var(--md-accent-fg-color--transparent);
}

.md-nav__title {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--lighter);
}

/* ----- Typography -------------------------------------------------------- */

.md-typeset {
  font-size: 0.8rem;
  line-height: 1.75;
}

.md-typeset h1,
.md-typeset h2 {
  font-weight: 700;
  letter-spacing: -0.015em;
}

.md-typeset h1 {
  background: linear-gradient(120deg, var(--tq-green-bright), var(--tq-teal) 55%, var(--tq-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

[data-md-color-scheme="default"] .md-typeset h1 {
  background-image: linear-gradient(120deg, #166534, #0f766e 60%, #0e7490);
}

/* The permalink glyph inherits the transparent gradient fill; keep it off h1 */
.md-typeset h1 .headerlink {
  display: none;
}

.md-typeset h2 {
  margin-top: 2.4em;
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--glass-border);
}

.md-typeset blockquote {
  border-left: 3px solid var(--tq-green);
  background: var(--md-accent-fg-color--transparent);
  border-radius: 0 var(--tq-radius) var(--tq-radius) 0;
  padding: 0.4rem 1rem;
  margin: 1.2em 0;
}

.md-typeset hr {
  border-bottom: 1px solid var(--glass-border);
}

/* ----- Code ----------------------------------------------------------------- */

.md-typeset code {
  font-size: 0.85em;
  border-radius: 6px;
}

.md-typeset .highlight {
  background: var(--md-code-bg-color);
  border: 1px solid var(--glass-border);
  border-radius: var(--tq-radius);
  box-shadow: 0 1px 0 var(--glass-highlight) inset;
}

.md-typeset pre > code {
  background: transparent;
  border-radius: var(--tq-radius);
}

.md-typeset .tabbed-set {
  border-radius: var(--tq-radius);
}

.md-typeset .tabbed-labels > label {
  transition: color var(--tq-ease);
}

/* ----- Tables ------------------------------------------------------------- */

.md-typeset table:not([class]) {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--tq-radius);
  box-shadow: none;
  overflow: hidden;
}

.md-typeset table:not([class]) th {
  background: var(--md-accent-fg-color--transparent);
  color: var(--md-default-fg-color);
  font-weight: 600;
}

.md-typeset table:not([class]) td,
.md-typeset table:not([class]) th {
  border-color: var(--glass-border);
}

/* ----- Admonitions ---------------------------------------------------------- */

.md-typeset .admonition,
.md-typeset details {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-left-width: 3px;
  border-radius: var(--tq-radius);
  box-shadow: 0 1px 0 var(--glass-highlight) inset;
}

/* ----- Footer --------------------------------------------------------------- */

.md-footer,
.md-footer-meta {
  background: transparent;
}

.md-footer__link {
  border-radius: var(--tq-radius);
  transition: background var(--tq-ease);
}

.md-footer__link:hover {
  background: var(--glass-bg);
  opacity: 1;
}

.md-footer,
.md-footer-meta,
.md-footer__title,
.md-footer__direction,
.md-copyright,
.md-copyright a {
  color: var(--md-default-fg-color--light);
}

/* ---------------------------------------------------------------------- */
/* Hero (docs/index.md)                                                    */
/* ---------------------------------------------------------------------- */

.tq-hero {
  position: relative;
  margin: 1.5rem 0 1.5rem;
  padding: 5rem 1.5rem 4rem;
  text-align: center;
  overflow: hidden;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 28px;
  box-shadow: 0 1px 0 var(--glass-highlight) inset, var(--glass-shadow);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
}

/* Top-left specular light source */
.tq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(60% 80% at 0% 0%, rgba(255, 255, 255, 0.16), transparent 60%);
}

.tq-hero__logo {
  width: 112px;
  border-radius: 24px;
  height: auto;
  margin-bottom: 1.25rem;
  filter: drop-shadow(0 0 24px rgba(34, 197, 94, 0.7));
  image-rendering: -webkit-optimize-contrast;
}

.tq-hero h1 {
  font-size: 2.9rem;
  line-height: 1.1;
  margin: 0 auto 1rem;
  max-width: 24ch;
  text-wrap: balance;
}

.tq-hero h1 .headerlink {
  display: none;
}

.tq-hero p {
  font-size: 1.1rem;
  max-width: 50ch;
  margin: 0 auto;
  color: var(--md-default-fg-color--light);
}

.tq-hero__actions {
  margin-top: 2.2rem;
  text-align: center;
}

.tq-hero__actions .md-button {
  margin: 0.375rem;
  padding: 0.55em 1.25em;
  font-size: 0.75rem;
  border-radius: 999px;
  display: inline-block;
  width: 10.5rem;
  text-align: center;
  color: var(--md-default-fg-color);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: transform var(--tq-ease), background var(--tq-ease), filter var(--tq-ease);
}

.tq-hero__actions .md-button:hover {
  background: var(--glass-bg-strong);
  border-color: var(--tq-border);
  color: var(--md-default-fg-color);
}

.tq-hero__actions .md-button--primary {
  background: linear-gradient(120deg, var(--tq-green), var(--tq-teal));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 24px rgba(20, 184, 166, 0.45);
}

.tq-hero__actions .md-button--primary:hover {
  background: linear-gradient(120deg, var(--tq-green), var(--tq-teal));
  color: #fff;
  filter: brightness(1.12);
  transform: translateY(-1px);
}

/* ----- Bento / feature grid ------------------------------------------------- */

.tq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.tq-card {
  position: relative;
  padding: 1.4rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
  box-shadow: 0 1px 0 var(--glass-highlight) inset;
  transition: transform var(--tq-ease), border-color var(--tq-ease), background var(--tq-ease), box-shadow var(--tq-ease);
}

.tq-card:hover {
  transform: translateY(-3px);
  border-color: var(--tq-border);
  background: var(--glass-bg-strong);
  box-shadow: 0 1px 0 var(--glass-highlight) inset, 0 12px 40px rgba(34, 197, 94, 0.22);
}

.tq-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  margin-bottom: 0.9rem;
  font-size: 1.4rem;
  border-radius: 12px;
  color: var(--md-accent-fg-color);
  background: var(--md-accent-fg-color--transparent);
  border: 1px solid var(--tq-border);
}

.tq-card__icon .twemoji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tq-card__icon svg {
  width: 1.4rem;
  height: 1.4rem;
  fill: currentColor;
}

.tq-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.tq-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--md-default-fg-color--light);
}

/* Bento layout (home): one large tile + three supporting tiles */
@media screen and (min-width: 60em) {
  .tq-grid--bento {
    grid-template-columns: repeat(4, 1fr);
  }

  .tq-grid--bento > .tq-card:nth-child(1) {
    grid-column: span 2;
    padding: 2rem;
    background:
      radial-gradient(90% 70% at 0% 0%, rgba(34, 197, 94, 0.22), transparent 70%),
      var(--glass-bg);
  }

  .tq-grid--bento > .tq-card:nth-child(1) h3 {
    font-size: 1.5rem;
  }

  .tq-grid--bento > .tq-card:nth-child(1) p {
    font-size: 1rem;
  }


}

/* ----- Language pills ------------------------------------------------------- */

.tq-pill {
  display: inline-block;
  padding: 0.15rem 0.7rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--md-accent-fg-color--transparent);
  color: var(--md-accent-fg-color);
  border: 1px solid var(--tq-border);
}

/* ----- Responsive ----------------------------------------------------------- */

@media screen and (max-width: 76.1875em) {
  .md-content__inner {
    margin: 1rem 0.4rem 2rem;
    padding: 1rem 1.1rem 1.8rem;
    border-radius: 16px;
  }
}

@media screen and (max-width: 44.9375em) {
  .tq-hero {
    padding: 3rem 1rem 2.5rem;
    border-radius: 20px;
  }

  .tq-hero h1 {
    font-size: 1.9rem;
  }
}

@media screen and (max-width: 22.5em) {
  .tq-hero h1 {
    font-size: 1.6rem;
  }
}

/* ----- Accessibility -------------------------------------------------------- */

a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--tq-green-bright);
  outline-offset: 2px;
  border-radius: 6px;
}

/* No blur support → fall back to opaque panels so text stays legible */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  :root {
    --glass-bg: rgba(8, 22, 18, 0.92);
    --glass-bg-strong: rgba(8, 22, 18, 0.96);
  }

  [data-md-color-scheme="default"] {
    --glass-bg: rgba(255, 255, 255, 0.92);
    --glass-bg-strong: rgba(255, 255, 255, 0.96);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  body::before {
    animation: none;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .tq-card:hover,
  .tq-hero__actions .md-button--primary:hover {
    transform: none;
  }
}

/* ----- API reference (mkdocstrings) ----------------------------------------- */

.doc-heading code,
.md-typeset .doc-heading {
  font-family: var(--md-code-font-family);
}

.md-typeset .doc-contents {
  margin-left: 0.2rem;
}

.md-typeset .doc-symbol {
  border-radius: 6px;
}

.md-typeset .tq-sheet {
  margin: 0 0 3rem;
  padding: 1.5rem 2rem 2.5rem;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
  box-shadow: 0 1px 0 var(--glass-highlight) inset, var(--glass-shadow);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
}

@media screen and (max-width: 44.9375em) {
  .md-typeset .tq-sheet {
    padding: 1rem 1.1rem 1.8rem;
    border-radius: 16px;
  }
}

.tq-hero__stack img {
  height: 40px;
  margin: 1.8rem 0.1rem 0;
  border-radius: 10px;
}

/* Turtle home: 7 tiles = 2+1+1 / 1+1+1+1 */