/* =========================================================================
   Whistle · extra.css
   Single stylesheet that re-skins mkdocs-material with two UI modes:
   - data-theme="plain"     (default) — calm technical, IBM Plex, blue accent
   - data-theme="playful"  — chunky friendly, Unbounded + DM Sans, yellow accent
   Toggle via the header switcher (theme-switcher.js).
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. Design tokens
   ------------------------------------------------------------------------- */

:root {
  /* SAFE tokens (defaults) */
  --w-bg:           #FAF8F3;
  --w-bg-deep:      #F2EEE2;
  --w-paper:        #FFFFFF;
  --w-ink:          #0E1216;
  --w-ink-soft:     #3D454D;
  --w-ink-muted:    #7A8088;
  --w-rule:         #E6E1D5;
  --w-rule-soft:    #EFEBE0;
  --w-rule-strong:  #0E1216;
  --w-accent:       #0066E6;
  --w-accent-soft:  #E8F0FF;
  --w-yellow:       #FAB400;

  --w-text-font:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --w-display-font: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --w-mono-font:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --w-display-weight: 600;
  --w-display-tracking: -0.02em;
  --w-display-uppercase: none;
  --w-radius: 6px;
  --w-radius-pill: 6px;
  --w-rule-weight: 1px;
  --w-card-shadow: none;
  --w-btn-shadow: none;
  --w-btn-border-weight: 1px;
  --w-header-border-weight: 1px;
}

/* Playful — significantly warmer paper, chunkier everything */
[data-theme="playful"] {
  --w-bg:           #F8EBC2;   /* visibly warmer yellow-cream */
  --w-bg-deep:      #F2DF99;
  --w-paper:        #FFFFFF;
  --w-ink:          #16140E;
  --w-ink-soft:     #3F3B2E;
  --w-ink-muted:    #6B6452;
  --w-rule:         #16140E;
  --w-rule-soft:    #D9CC9C;
  --w-rule-strong:  #16140E;
  --w-accent:       #16140E;        /* keep dark text/link color */
  --w-accent-soft:  #FCE6A1;
  --w-yellow:       #F5C400;

  --w-text-font:    "DM Sans", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --w-display-font: "Unbounded", "DM Sans", system-ui, sans-serif;
  --w-mono-font:    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --w-display-weight: 800;
  --w-display-tracking: -0.04em;
  --w-display-uppercase: uppercase;
  --w-radius: 12px;
  --w-radius-pill: 999px;
  --w-rule-weight: 2px;
  --w-card-shadow: 5px 5px 0 var(--w-rule);
  --w-btn-shadow: 4px 4px 0 var(--w-rule);
  --w-btn-border-weight: 2.5px;
  --w-header-border-weight: 2px;
}

/* -------------------------------------------------------------------------
   2. Bind tokens to Material's CSS variables
   We attach to :root AND every common scheme selector so we win the cascade
   regardless of which one Material is using.
   ------------------------------------------------------------------------- */

:root,
:root[data-md-color-scheme="default"],
[data-md-color-scheme="default"] {
  --md-text-font:         var(--w-text-font);
  --md-code-font:         var(--w-mono-font);

  --md-default-bg-color:        var(--w-bg);
  --md-default-fg-color:        var(--w-ink);
  --md-default-fg-color--light: var(--w-ink-soft);
  --md-default-fg-color--lighter: var(--w-ink-muted);
  --md-default-fg-color--lightest: var(--w-rule-soft);

  --md-typeset-color:     var(--w-ink);
  --md-typeset-a-color:   var(--w-accent);

  --md-primary-fg-color:        var(--w-ink);
  --md-primary-fg-color--light: var(--w-ink-soft);
  --md-primary-fg-color--dark:  var(--w-ink);
  --md-primary-bg-color:        var(--w-bg);
  --md-primary-bg-color--light: var(--w-bg);

  --md-accent-fg-color:         var(--w-accent);
  --md-accent-fg-color--transparent: color-mix(in oklab, var(--w-accent) 12%, transparent);
  --md-accent-bg-color:         var(--w-bg);

  --md-code-bg-color:           var(--w-paper);
  --md-code-fg-color:           var(--w-ink);

  --md-footer-bg-color:         var(--w-bg);
  --md-footer-bg-color--dark:   var(--w-bg);
  --md-footer-fg-color:         var(--w-ink-soft);
  --md-footer-fg-color--light:  var(--w-ink-muted);
  --md-footer-fg-color--lighter: var(--w-ink-muted);
}

/* Apply background to body so playful's warmer bg paints everywhere */
body {
  background-color: var(--w-bg);
  font-feature-settings: "ss01", "cv01";
}

/* -------------------------------------------------------------------------
   3. Suppress mkdocs' auto-generated "# Home" H1 on the home page so the
   hero acts as the title. (mkdocs-material inserts an h1 derived from the
   page's nav title when no h1 is in the markdown.)
   ------------------------------------------------------------------------- */

body[data-md-template$="home.html"] .md-content h1:first-of-type {
  display: none;
}

/* -------------------------------------------------------------------------
   4. Type scale
   ------------------------------------------------------------------------- */

.md-typeset {
  font-size: 0.78rem;
  line-height: 1.65;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-family: var(--w-display-font);
  font-weight: var(--w-display-weight);
  letter-spacing: var(--w-display-tracking);
  text-transform: var(--w-display-uppercase);
  color: var(--w-ink);
}

.md-typeset h1 { font-size: clamp(2rem, 6vw, 2.6rem); line-height: 1.05; margin: 0 0 0.6rem; }
.md-typeset h2 { font-size: clamp(1.3rem, 3.5vw, 1.55rem); line-height: 1.2;  margin: 2.4rem 0 0.7rem; }
.md-typeset h3 { font-size: 1.1rem; line-height: 1.3; margin: 1.4rem 0 0.4rem; }

/* -------------------------------------------------------------------------
   5. Header
   ------------------------------------------------------------------------- */

.md-header {
  background-color: var(--w-bg);
  color: var(--w-ink);
  box-shadow: none;
  border-bottom: var(--w-header-border-weight) solid var(--w-rule-strong);
}
.md-header[data-md-state="shadow"] { box-shadow: none; }

[data-theme="plain"] .md-header { border-bottom-color: var(--w-rule); }
[data-theme="playful"] .md-header {
  background: linear-gradient(180deg, var(--w-bg) 0%, var(--w-bg-deep) 100%);
}

.md-header__title {
  font-family: var(--w-display-font);
  font-weight: var(--w-display-weight);
  letter-spacing: var(--w-display-tracking);
  text-transform: var(--w-display-uppercase);
  font-size: 1rem;
  color: var(--w-ink);
}

/* Logo: small bolt, tinted via background. Playful wraps it in a yellow chip. */
.md-header__button.md-logo svg,
.md-header__button.md-logo img {
  height: 1.4rem;
  width: 1.4rem;
  color: var(--w-ink);
  fill: var(--w-ink);
}

[data-theme="playful"] .md-header__button.md-logo {
  background: var(--w-yellow);
  border: 2px solid var(--w-rule);
  border-radius: 8px;
  padding: 4px;
  margin: 0.4rem 0.2rem;
  box-shadow: 2px 2px 0 var(--w-rule);
}
[data-theme="playful"] .md-header__button.md-logo svg,
[data-theme="playful"] .md-header__button.md-logo img {
  height: 1.1rem;
  width: 1.1rem;
}

/* Search */
.md-search__form {
  background: var(--w-paper);
  border: var(--w-rule-weight) solid var(--w-rule);
  border-radius: var(--w-radius);
  color: var(--w-ink);
}
[data-theme="playful"] .md-search__form {
  border-radius: 999px;
  border-width: 2px;
  border-color: var(--w-rule);
}
.md-search__input { color: var(--w-ink); }
.md-search__input::placeholder { color: var(--w-ink-muted); }

/* GitHub source widget */
.md-header__source { color: var(--w-ink); }

/* -------------------------------------------------------------------------
   6. UI toggle (Safe / Playful switcher)
   ------------------------------------------------------------------------- */

.w-ui-toggle {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  margin: 0 0.5rem;
  background: var(--w-paper);
  border: var(--w-rule-weight) solid var(--w-rule);
  border-radius: 999px;
  font-family: var(--w-text-font);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--w-ink);
  cursor: pointer;
  height: 28px;
  line-height: 1;
  white-space: nowrap;
  flex-shrink: 0;
}
.w-ui-toggle__opt {
  padding: 5px 11px;
  border-radius: 999px;
  color: var(--w-ink-muted);
  transition: background 0.15s, color 0.15s;
  user-select: none;
}
[data-theme="plain"] .w-ui-toggle__opt[data-ui="plain"] {
  background: var(--w-ink);
  color: var(--w-bg);
}
[data-theme="playful"] .w-ui-toggle__opt[data-ui="playful"] {
  background: var(--w-yellow);
  color: var(--w-ink);
}
[data-theme="plain"] .w-ui-toggle {
  border-width: 2px;
  box-shadow: 2px 2px 0 var(--w-rule);
}

/* On narrow mobile, shrink the toggle so it fits */
@media (max-width: 30em) {
  .w-ui-toggle { font-size: 10px; height: 24px; margin: 0 0.3rem; }
  .w-ui-toggle__opt { padding: 4px 7px; }
}

/* -------------------------------------------------------------------------
   7. Sidebars & nav
   ------------------------------------------------------------------------- */

.md-nav__title {
  font-family: var(--w-mono-font);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--w-ink-muted);
  font-weight: 600;
  background: transparent !important;
  box-shadow: none !important;
}
.md-nav__link {
  font-family: var(--w-text-font);
  color: var(--w-ink-soft);
  padding: 0.35rem 0.6rem;
  border-radius: var(--w-radius);
  transition: background 0.12s, color 0.12s;
}
.md-nav__link:hover { background: var(--w-rule-soft); color: var(--w-ink); }

.md-nav__link--active,
.md-nav__item--active > .md-nav__link {
  color: var(--w-ink);
  font-weight: 600;
  background: var(--w-accent-soft);
}
[data-theme="plain"] .md-nav__link--active {
  background: var(--w-accent-soft);
  color: var(--w-accent);
}
[data-theme="playful"] .md-nav__link {
  border-radius: 999px;
  font-weight: 500;
}
[data-theme="playful"] .md-nav__link--active,
[data-theme="playful"] .md-nav__item--active > .md-nav__link {
  background: var(--w-yellow);
  color: var(--w-ink);
  border: 2px solid var(--w-rule);
  margin-left: -2px;
  font-weight: 700;
}

/* -------------------------------------------------------------------------
   8. Buttons
   ------------------------------------------------------------------------- */

.w-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.7rem 1.1rem;
  border: var(--w-btn-border-weight) solid var(--w-rule);
  border-radius: var(--w-radius-pill);
  font-family: var(--w-text-font);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none !important;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
  white-space: nowrap;
  line-height: 1;
}
[data-theme="playful"] .w-btn {
  font-weight: 700;
  box-shadow: var(--w-btn-shadow);
  padding: 0.8rem 1.3rem;
}
[data-theme="playful"] .w-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--w-rule);
}
.w-btn--primary {
  background: var(--w-ink);
  color: var(--w-bg) !important;
  border-color: var(--w-ink);
}
[data-theme="playful"] .w-btn--primary {
  background: var(--w-yellow);
  color: var(--w-ink) !important;
}
.w-btn--ghost {
  background: var(--w-paper);
  color: var(--w-ink) !important;
}

/* -------------------------------------------------------------------------
   9. Hero
   ------------------------------------------------------------------------- */

.w-hero {
  background: var(--w-bg);
  padding: 4rem 1.6rem 3rem;
  border-bottom: var(--w-rule-weight) solid var(--w-rule);
}
[data-theme="playful"] .w-hero {
  background: linear-gradient(180deg, var(--w-bg) 0%, var(--w-bg-deep) 100%);
  border-bottom: 2px solid var(--w-rule);
  position: relative;
  overflow: hidden;
}
[data-theme="playful"] .w-hero::after {
  content: "";
  position: absolute;
  right: -60px; top: -60px;
  width: 280px; height: 280px;
  background: var(--w-yellow);
  border: 2.5px solid var(--w-rule);
  border-radius: 50%;
  opacity: 0.55;
  z-index: 0;
  pointer-events: none;
}

.w-hero__inner {
  max-width: 56rem;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.w-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1.3rem;
  font-family: var(--w-mono-font);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--w-accent);
}
[data-theme="playful"] .w-hero__eyebrow {
  background: var(--w-paper);
  padding: 0.4rem 0.9rem 0.4rem 0.5rem;
  border: 2px solid var(--w-rule);
  border-radius: 999px;
  font-family: var(--w-text-font);
  font-size: 0.7rem;
  letter-spacing: 0;
  text-transform: none;
  font-weight: 600;
  color: var(--w-ink);
  box-shadow: 2px 2px 0 var(--w-rule);
}

/* Bolt mark (uses mask so it tints with currentColor logic) */
.w-bolt {
  display: inline-block;
  width: 14px;
  height: 14px;
  background-color: var(--w-ink);
  -webkit-mask: url("../assets/whistle-bolt.svg") center/contain no-repeat;
          mask: url("../assets/whistle-bolt.svg") center/contain no-repeat;
  flex-shrink: 0;
}
[data-theme="playful"] .w-hero__eyebrow .w-bolt {
  width: 22px; height: 22px;
  background-color: transparent;
  -webkit-mask: none; mask: none;
  position: relative;
  border-radius: 6px;
  border: 2px solid var(--w-rule);
  background-color: var(--w-yellow);
}
[data-theme="playful"] .w-hero__eyebrow .w-bolt::before {
  content: "";
  position: absolute; inset: 2px;
  background-color: var(--w-ink);
  -webkit-mask: url("../assets/whistle-bolt.svg") center/contain no-repeat;
          mask: url("../assets/whistle-bolt.svg") center/contain no-repeat;
}

.w-hero__title {
  font-family: var(--w-display-font);
  font-weight: var(--w-display-weight);
  letter-spacing: var(--w-display-tracking);
  text-transform: var(--w-display-uppercase);
  font-size: clamp(2.2rem, 6.5vw, 4rem);
  line-height: 1.02;
  margin: 0 0 1.2rem;
  text-wrap: balance;
  color: var(--w-ink);
}

.w-hl { display: inline; }
[data-theme="playful"] .w-hl {
  position: relative;
  display: inline-block;
  padding: 0 0.4rem;
}
[data-theme="playful"] .w-hl::before {
  content: "";
  position: absolute;
  inset: 0.2em -0.05em 0.06em -0.05em;
  background: var(--w-yellow);
  border: 2px solid var(--w-rule);
  border-radius: 8px;
  transform: rotate(-1.5deg);
  z-index: -1;
}

.w-hero__sub {
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--w-ink-soft);
  max-width: 40rem;
  margin: 0 0 1.8rem;
  text-wrap: pretty;
}

.w-hero__cta {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
}

.w-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 0.3rem;
  font-family: var(--w-mono-font);
  font-size: 0.7rem;
  color: var(--w-ink-muted);
}
.w-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--w-yellow);
}
[data-theme="playful"] .w-dot {
  background: #FF6B5C;
  box-shadow: 0 0 0 4px rgba(255, 107, 92, 0.25);
}

/* Mobile hero */
@media (max-width: 50em) {
  .w-hero { padding: 2.4rem 1.1rem 2.4rem; }
  .w-hero__title { margin-bottom: 1rem; }
  .w-hero__sub { font-size: 0.95rem; margin-bottom: 1.4rem; }
  [data-theme="playful"] .w-hero::after { width: 180px; height: 180px; right: -90px; top: -90px; }
}

/* -------------------------------------------------------------------------
   10. Cards row ("A different shape")
   ------------------------------------------------------------------------- */

.w-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.6rem 0 2rem;
}
@media (max-width: 60em) {
  .w-cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 38em) {
  .w-cards { grid-template-columns: 1fr; }
}

.w-card {
  background: var(--w-paper);
  border: var(--w-rule-weight) solid var(--w-rule);
  border-radius: var(--w-radius);
  padding: 1.2rem;
  box-shadow: var(--w-card-shadow);
}
[data-theme="playful"] .w-card { border-width: 2px; border-color: var(--w-rule); }
[data-theme="playful"] .w-cards > *:nth-child(1) { transform: rotate(-0.6deg); }
[data-theme="playful"] .w-cards > *:nth-child(2) { transform: rotate(0.5deg) translateY(-3px); }
[data-theme="playful"] .w-cards > *:nth-child(3) { transform: rotate(-0.3deg); }

.w-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--w-radius);
  margin-bottom: 0.9rem;
  overflow: hidden;
  background: var(--w-rule-soft);
}
[data-theme="playful"] .w-card__icon {
  width: 64px; height: 64px;
  border: 2px solid var(--w-rule);
  border-radius: 12px;
}
.w-card__icon img { display: block; max-width: 100%; height: auto; }

.w-card__icon--nostr  { background: #F0E4FF; }
.w-card__icon--mls    { background: #F0E4FF; }
.w-card__icon--marmot { background: #FFE9D2; padding: 0; }
.w-card__icon--marmot img { image-rendering: pixelated; width: 100%; height: 100%; object-fit: cover; }

.w-card__title {
  font-family: var(--w-display-font);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.3rem;
  color: var(--w-ink);
}
[data-theme="playful"] .w-card__title {
  font-weight: 800;
  letter-spacing: -0.02em;
}
.w-card__body {
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--w-ink-soft);
}

/* -------------------------------------------------------------------------
   11. Pairs grid + features list
   ------------------------------------------------------------------------- */

.w-pairs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.6rem 0 2rem;
}
@media (max-width: 50em) {
  .w-pairs { grid-template-columns: 1fr; }
}
.w-pair {
  background: var(--w-paper);
  border: var(--w-rule-weight) solid var(--w-rule);
  border-radius: var(--w-radius);
  padding: 1rem 1.2rem;
  box-shadow: var(--w-card-shadow);
}
[data-theme="playful"] .w-pair { border-width: 2px; }
[data-theme="playful"] .w-pair:nth-child(2n) { background: var(--w-accent-soft); }
[data-theme="playful"] .w-pair:nth-child(4n) { background: #FFE6B0; }

.w-pair__title {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--w-display-font);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.4rem;
  text-transform: var(--w-display-uppercase);
  color: var(--w-ink);
}

.w-features {
  list-style: none !important;
  padding: 0 !important;
  margin: 1.2rem 0 !important;
}
.w-features li {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 1.5rem;
  padding: 0.95rem 0;
  border-top: 1px solid var(--w-rule-soft);
}
.w-features li::before { content: none !important; } /* kill default bullet */
.w-features li:first-child { border-top: none; }
.w-features li > strong {
  font-family: var(--w-display-font);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: -0.01em;
  color: var(--w-ink);
  text-transform: var(--w-display-uppercase);
}
.w-features li > span {
  font-size: 0.86rem;
  color: var(--w-ink-soft);
  line-height: 1.55;
}
@media (max-width: 50em) {
  .w-features li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
    padding: 0.8rem 0;
  }
}

/* -------------------------------------------------------------------------
   12. Hide sidebar/TOC on home page (uses template: home.html)
   ------------------------------------------------------------------------- */

body[data-md-template$="home.html"] .md-sidebar--primary,
body[data-md-template$="home.html"] .md-sidebar--secondary {
  display: none !important;
}
body[data-md-template$="home.html"] .md-content {
  max-width: 100%;
  margin: 0;
}
body[data-md-template$="home.html"] .md-main__inner {
  max-width: 64rem;
  margin: 0 auto;
}

/* -------------------------------------------------------------------------
   13. Admonitions
   ------------------------------------------------------------------------- */

.md-typeset .admonition,
.md-typeset details {
  border-width: var(--w-rule-weight);
  border-radius: var(--w-radius);
  box-shadow: none;
}
[data-theme="playful"] .md-typeset .admonition,
[data-theme="playful"] .md-typeset details {
  border-width: 2px;
  box-shadow: 3px 3px 0 var(--w-rule);
}
.md-typeset .admonition.note,
.md-typeset details.note {
  border-color: var(--w-accent);
  background: var(--w-accent-soft);
}
[data-theme="playful"] .md-typeset .admonition.warning,
[data-theme="playful"] .md-typeset details.warning {
  border-color: var(--w-rule);
  background: var(--w-yellow);
}

/* -------------------------------------------------------------------------
   14. Code blocks
   ------------------------------------------------------------------------- */

.md-typeset pre {
  border-radius: var(--w-radius);
  border: var(--w-rule-weight) solid var(--w-rule);
}
[data-theme="playful"] .md-typeset pre {
  border-width: 2px;
  box-shadow: 3px 3px 0 var(--w-rule);
}
.md-typeset code { font-family: var(--w-mono-font); }
.md-typeset :not(pre) > code {
  background: var(--w-rule-soft);
  border: none;
  padding: 0.1em 0.4em;
  border-radius: 4px;
}
[data-theme="playful"] .md-typeset :not(pre) > code {
  background: var(--w-accent-soft);
}

/* -------------------------------------------------------------------------
   15. Footer
   ------------------------------------------------------------------------- */

.md-footer-meta {
  background: var(--w-bg);
  border-top: var(--w-rule-weight) solid var(--w-rule);
  color: var(--w-ink-muted);
  font-family: var(--w-mono-font);
  font-size: 0.7rem;
}
[data-theme="playful"] .md-footer-meta {
  font-family: var(--w-text-font);
  font-weight: 500;
  background: var(--w-bg-deep);
}
.md-footer { background: var(--w-bg); color: var(--w-ink-soft); }
.md-footer-meta__inner { padding: 0.8rem 1rem; }

/* -------------------------------------------------------------------------
   16. Mobile global tweaks
   ------------------------------------------------------------------------- */

@media (max-width: 60em) {
  .md-header__title { font-size: 0.9rem; }
  .md-search__form { border-radius: var(--w-radius); }
}
@media (max-width: 30em) {
  .md-header { padding: 0; }
  .md-header__inner { padding: 0 0.4rem; }
  .md-header__title { display: none; }   /* free room for the toggle */
}