/**
 * Mobius Handbook — UI/UX layer (readability, motion, focus, mobile)
 * Loads after Terminal theme + proof cards.
 */

/* 1 — Comfortable reading measure */
.md-content__inner {
  max-width: 48rem;
}

.md-typeset {
  font-size: 0.92rem;
  line-height: 1.65;
}

@media screen and (min-width: 76.25em) {
  .md-content__inner {
    margin-right: auto;
  }
}

/* 2 — Font rendering */
body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.mobius-proof-card__value {
  font-variant-numeric: tabular-nums;
}

/* 3 — Dismissible announce bar */
.md-banner {
  border-radius: 0 0 10px 10px;
  border: 1px solid var(--md-default-fg-color--lightest, rgba(127, 127, 127, 0.25));
  border-top: none;
  position: relative;
  padding-right: 2.5rem !important;
}

.md-banner .mobius-announce-dismiss {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  appearance: none;
  border: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 6px;
  font-size: 1.25rem;
  line-height: 1;
  opacity: 0.75;
}

.md-banner .mobius-announce-dismiss:hover {
  opacity: 1;
  background: rgba(127, 127, 127, 0.12);
}

/* 4 — Focus-visible for custom controls */
.mobius-proof-expand:focus-visible,
.mobius-proof-chain__toggle:focus-visible,
.mobius-live-bar__refresh:focus-visible,
.mobius-proof-copy:focus-visible,
.mobius-announce-dismiss:focus-visible {
  outline: 2px solid var(--md-accent-fg-color, #22d3ee);
  outline-offset: 2px;
}

/* 5 — Proof strip: horizontal scroll on small screens */
.mobius-proof-strip {
  flex-wrap: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.mobius-proof-strip mobius-proof {
  scroll-snap-align: start;
  flex: 0 0 min(100%, 200px);
}

/* 6 — Proof card loading state */
.mobius-proof-card--loading .mobius-proof-card__value {
  background: linear-gradient(
    90deg,
    var(--md-code-bg-color, #1a222d) 0%,
    rgba(34, 211, 238, 0.12) 50%,
    var(--md-code-bg-color, #1a222d) 100%
  );
  background-size: 200% 100%;
  animation: mobius-shimmer 1.2s ease-in-out infinite;
  border-radius: 4px;
  min-height: 1.25em;
}

@media (prefers-reduced-motion: reduce) {
  .mobius-proof-card--loading .mobius-proof-card__value {
    animation: none;
    opacity: 0.7;
  }
}

@keyframes mobius-shimmer {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: -100% 0;
  }
}

/* 7 — Raw JSON panel: taller, clearer */
.mobius-proof-raw {
  max-height: min(50vh, 18rem);
  border-radius: 6px;
  border: 1px solid var(--md-default-fg-color--lightest, rgba(127, 127, 127, 0.35));
  padding: 0.5rem;
  background: var(--md-default-bg-color--lightest, rgba(0, 0, 0, 0.2));
}

/* 8 — Live bar: GI chip colors */
.mobius-live-bar__chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mobius-live-bar__chip--green {
  background: rgba(52, 211, 153, 0.2);
  color: #6ee7b7;
  border: 1px solid rgba(52, 211, 153, 0.45);
}

.mobius-live-bar__chip--yellow {
  background: rgba(251, 191, 36, 0.15);
  color: #fcd34d;
  border: 1px solid rgba(251, 191, 36, 0.4);
}

.mobius-live-bar__chip--red {
  background: rgba(248, 113, 113, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(248, 113, 113, 0.4);
}

.mobius-live-bar__refresh {
  appearance: none;
  margin-left: auto;
  padding: 0.2rem 0.55rem;
  font-size: 0.68rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.mobius-live-bar__refresh:hover {
  border-color: var(--md-accent-fg-color, #22d3ee);
  color: var(--md-accent-fg-color);
}

/* 9 — Proof chain panel: clearer hierarchy */
.mobius-proof-chain__toggle {
  font-weight: 600;
  padding: 0.45rem 0.85rem;
}

.mobius-proof-chain__panel {
  max-height: min(70vh, 28rem);
  overflow-y: auto;
}

/* 10 — Copy value button */
.mobius-proof-copy {
  margin-top: 0.35rem;
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--md-default-fg-color--lightest);
  background: transparent;
  color: var(--md-typeset-a-color);
  cursor: pointer;
  font-weight: 600;
}

.mobius-proof-copy:hover {
  border-color: var(--md-accent-fg-color);
}

.mobius-proof-copy.mobius-proof-copy--done {
  border-color: rgba(52, 211, 153, 0.6);
  color: #6ee7b7;
}

/* --------------------------------------------------------------------------
 * Reader preferences (10 customizations) — toggled via mobius-handbook.js
 * Body classes: mobius-pref-compact | mobius-pref-wide | mobius-pref-toc-off |
 * mobius-pref-tabs-sticky-off | mobius-pref-reduce-motion | mobius-pref-proof-compact |
 * mobius-pref-underline-links | mobius-pref-live-bar-compact |
 * mobius-pref-code-wrap | mobius-pref-focus-strong
 * -------------------------------------------------------------------------- */

.mobius-reader-panel {
  position: fixed;
  right: 0.75rem;
  bottom: 0.75rem;
  z-index: 400;
  font-size: 0.8125rem;
  line-height: 1.4;
}

.mobius-reader-panel__toggle {
  appearance: none;
  border: 1px solid var(--mobius-terminal-border, #2a3544);
  background: var(--mobius-terminal-surface, #121820);
  color: var(--mobius-terminal-accent, #22d3ee);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
}

.mobius-reader-panel__toggle:hover {
  border-color: var(--mobius-terminal-accent, #22d3ee);
}

.mobius-reader-panel__toggle:focus-visible {
  outline: 2px solid var(--mobius-terminal-accent, #22d3ee);
  outline-offset: 2px;
}

.mobius-reader-panel__sheet {
  display: none;
  position: absolute;
  right: 0;
  bottom: calc(100% + 0.5rem);
  width: min(18.5rem, calc(100vw - 1.5rem));
  max-height: min(70vh, 26rem);
  overflow-y: auto;
  border-radius: 12px;
  border: 1px solid var(--mobius-terminal-border, #2a3544);
  background: var(--mobius-terminal-bg, #0a0e14);
  color: var(--mobius-terminal-text, #e8edf4);
  padding: 0.75rem 0.85rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  -webkit-overflow-scrolling: touch;
}

.mobius-reader-panel--open .mobius-reader-panel__sheet {
  display: block;
}

.mobius-reader-panel__title {
  margin: 0 0 0.5rem;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--mobius-terminal-muted, #8b9cb3);
}

.mobius-reader-panel__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(42, 53, 68, 0.85);
}

.mobius-reader-panel__row:last-of-type {
  border-bottom: none;
}

.mobius-reader-panel__label {
  flex: 1;
  font-weight: 600;
}

.mobius-reader-panel__hint {
  display: block;
  font-weight: 400;
  font-size: 0.68rem;
  opacity: 0.72;
  margin-top: 0.15rem;
}

.mobius-reader-panel__switch {
  appearance: none;
  width: 2.5rem;
  height: 1.35rem;
  border-radius: 999px;
  border: 1px solid var(--mobius-terminal-border, #2a3544);
  background: var(--mobius-terminal-elevated, #1a222d);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: background 0.15s ease;
}

.mobius-reader-panel__switch::after {
  content: '';
  position: absolute;
  top: 0.12rem;
  left: 0.12rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--mobius-terminal-muted, #8b9cb3);
  transition: transform 0.15s ease, background 0.15s ease;
}

.mobius-reader-panel__switch[aria-checked='true'] {
  background: rgba(34, 211, 238, 0.2);
  border-color: rgba(34, 211, 238, 0.5);
}

.mobius-reader-panel__switch[aria-checked='true']::after {
  transform: translateX(1.1rem);
  background: var(--mobius-terminal-accent, #22d3ee);
}

.mobius-reader-panel__switch:focus-visible {
  outline: 2px solid var(--mobius-terminal-accent, #22d3ee);
  outline-offset: 2px;
}

.mobius-reader-panel__footer {
  margin-top: 0.65rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(42, 53, 68, 0.85);
}

.mobius-reader-panel__reset {
  appearance: none;
  width: 100%;
  padding: 0.45rem;
  border-radius: 8px;
  border: 1px solid var(--mobius-terminal-border, #2a3544);
  background: transparent;
  color: inherit;
  font-weight: 600;
  font-size: 0.75rem;
  cursor: pointer;
}

.mobius-reader-panel__reset:hover {
  border-color: var(--mobius-terminal-accent, #22d3ee);
  color: var(--mobius-terminal-accent, #22d3ee);
}

/* 1 — Compact type */
body.mobius-pref-compact .md-typeset {
  font-size: 0.86rem;
  line-height: 1.55;
}

/* 2 — Wide measure */
body.mobius-pref-wide .md-content__inner {
  max-width: 58rem;
}

/* 3 — Hide integrated TOC column */
body.mobius-pref-toc-off .md-sidebar--secondary {
  display: none !important;
}

body.mobius-pref-toc-off .md-content {
  max-width: 100%;
}

/* 4 — Tabs not sticky */
body.mobius-pref-tabs-sticky-off .md-tabs {
  position: relative !important;
  top: auto !important;
}

/* 5 — Reduce motion */
body.mobius-pref-reduce-motion *,
body.mobius-pref-reduce-motion *::before,
body.mobius-pref-reduce-motion *::after {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
  scroll-behavior: auto !important;
}

/* 6 — Compact proof cards */
body.mobius-pref-proof-compact .mobius-proof-card {
  padding: 0.45rem 0.55rem;
  margin: 0.5rem 0;
}

body.mobius-pref-proof-compact mobius-proof,
body.mobius-pref-proof-compact .mobius-proof-fallback {
  margin: 0.45rem 0;
}

/* 7 — Underline links in prose */
body.mobius-pref-underline-links .md-typeset a:not(.md-button):not(.md-nav__link):not(.md-tabs__link) {
  text-decoration: underline;
  text-underline-offset: 0.12em;
}

/* 8 — Compact live bar */
body.mobius-pref-live-bar-compact .mobius-live-bar {
  font-size: 0.66rem;
  padding: 0.28rem 0.55rem;
  gap: 0.35rem 0.65rem;
}

/* 9–10 — Code wrap + stronger focus */
body.mobius-pref-code-wrap .md-typeset code,
body.mobius-pref-code-wrap .md-typeset pre code {
  white-space: pre-wrap;
  word-break: break-word;
}

body.mobius-pref-focus-strong .md-typeset a:focus-visible,
body.mobius-pref-focus-strong button:focus-visible,
body.mobius-pref-focus-strong .md-tabs__link:focus-visible,
body.mobius-pref-focus-strong .md-nav__link:focus-visible {
  outline: 3px solid var(--md-accent-fg-color, #22d3ee);
  outline-offset: 3px;
}

/* Mobile: organized header + drawer + content rhythm */
@media screen and (max-width: 59.9375em) {
  /* Mobile nav: clearer section hierarchy in the drawer */
  .md-nav--primary .md-nav__item--section > .md-nav__link {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.88;
  }

  .md-header__inner {
    row-gap: 0.25rem;
    align-items: flex-start;
  }

  .md-header__title {
    flex: 1 1 auto;
    min-width: 0;
  }

  .md-search {
    flex: 1 1 100%;
    max-width: none;
    order: 5;
    padding: 0.15rem 0 0.25rem;
  }

  .md-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .md-tabs__list {
    flex-wrap: nowrap;
  }

  .md-tabs__link {
    white-space: nowrap;
    padding: 0.55rem 0.65rem;
  }

  .md-content {
    padding-top: 0.75rem;
  }

  .md-content__inner {
    padding-bottom: 5rem;
  }

  .mobius-reader-panel {
    right: 0.5rem;
    bottom: 0.5rem;
  }
}

@media screen and (max-width: 44.9375em) {
  .md-typeset h1 {
    font-size: 1.35rem;
  }

  .md-typeset h2 {
    font-size: 1.08rem;
  }
}