/* ─────────────────────────────────────────────────────────────
   Design tokens
   Stage:  near-black, art is the only bright thing on screen.
   Panel:  warm gallery paper — the one place the UI gets to speak.
   ───────────────────────────────────────────────────────────── */

:root {
  --stage-bg: #0c0b0a;
  --paper: #EDE8DE;
  --paper-deep: #E2DCCD;
  --ink: #161514;
  --ink-soft: #3a3733;
  --gold: #9C7A3C;          /* decorative accent only (border, icons) — not for text on paper */
  --gold-stage: #BC9550;    /* AAA (7:1) against the dark stage — use for focus rings/text there */
  --gold-ink: #5D4924;      /* AAA (7:1) against paper — use for any gold TEXT on paper */
  --sage: #4A5D4E;
  --rust: #B05A3C;
  --border: #948356;        /* meets 3:1 non-text contrast on both white and paper */

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;

  --panel-width: 24rem;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

/* Keep the `hidden` attribute authoritative even on elements that set their own
   `display` (e.g. .icon-btn uses inline-flex), so toggling `hidden` in JS works. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--stage-bg);
  font-family: var(--sans);
  overflow: hidden;
}

button { font-family: inherit; cursor: pointer; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* ───────────────────────── Stage ───────────────────────── */

.stage {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--stage-bg);
}

.stage__backdrop {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, #161412 0%, #0c0b0a 70%);
}

.artwork {
  position: relative;
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  box-shadow: 0 2rem 6rem rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}

.artwork.is-visible { opacity: 1; }

.empty-state {
  position: relative;
  color: var(--paper);
  font-family: var(--serif);
  font-size: 1.1rem;
  text-align: center;
  max-width: 24rem;
  opacity: 0.75;
}

/* ───────────────────────── Quick-start (idle, signed in) ─────────────────────
   Two preview cards flanking a settings link. Each card loads that source. */

.quick-start {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  width: min(26rem, 90vw);
  text-align: center;
}

.quick-start__hint {
  margin: 1.25rem 0; /* breathing room from the cards above and below */
  font-family: var(--serif);
  color: var(--paper);
  font-size: 1.05rem;
}

/* A button styled as an inline text link (opens settings). */
.linklike {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.linklike:hover { color: var(--gold-stage); }

.quick-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.6rem;
  text-align: left;
  background: rgba(12, 11, 10, 0.55);
  border: 1px solid rgba(237, 232, 222, 0.18);
  border-radius: 0.5rem;
  color: var(--paper);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.quick-card:hover,
.quick-card:focus-visible {
  background: rgba(12, 11, 10, 0.8);
  border-color: var(--gold-stage);
}

.quick-card__thumb {
  flex: 0 0 auto;
  width: 4.5rem;
  height: 4.5rem;
  object-fit: cover;
  border-radius: 0.35rem;
  background: rgba(0, 0, 0, 0.4);
}

.quick-card__text {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.quick-card__kicker {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-stage);
}
.quick-card__title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  line-height: 1.25;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
}
.quick-card__arrow {
  flex: 0 0 auto;
  font-size: 1.4rem;
  color: var(--gold-stage);
}

/* ───────────────────────── Museum wall label ─────────────────────────
   Dark glass card over the artwork. alpha is held at >=0.85 so paper-
   colored text keeps AAA contrast (7:1+) even over a near-white painting
   behind it — verified against the worst case, not just typical art. */

/* Centered at the bottom; width is clamped to the viewport so it never spills
   off-screen on narrow/mobile displays (the hide button now lives in the top
   control row, so the wrap holds only the card). */
.label-wrap {
  position: absolute;
  left: 50%;
  bottom: 4.75rem; /* sits above the control row, which is anchored at the bottom */
  transform: translateX(-50%);
  width: min(38rem, calc(100vw - 2rem));
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}

.label-wrap.is-hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(0.6rem);
  pointer-events: none;
}

.label {
  box-sizing: border-box;
  width: 100%;
  background: rgba(12, 11, 10, 0.85);
  backdrop-filter: blur(6px);
  color: var(--paper);
  padding: 0.9rem 1.1rem 0.85rem;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 1rem;
  border-left: 3px solid var(--gold-stage);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.45);
  transition: background 0.2s var(--ease);
}

/* The textual content (title, byline, medium, tags) stacks in this column so
   the scan-to-view QR can sit beside it. */
.label__body {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

/* Scan-to-view QR: stays visible even when the label minimizes mid-slide, so an
   unattended display always offers a way to reach the piece. */
.label__qr {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}
.label__qr canvas {
  width: 5.5rem;
  height: 5.5rem;
  display: block;
  border-radius: 0.25rem;
  background: #fff;
  image-rendering: pixelated;
}
.label__qr-cap {
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--paper);
  opacity: 0.8;
}

.label:has(.label__row:hover),
.label:has(.label__row:focus-visible) {
  background: rgba(12, 11, 10, 0.95);
}

.label__row {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.label__title {
  /* Switchable in settings: serif (default) or sans, via the .title-sans class
     on <html>. Italic only reads well in serif, so drop it for sans. */
  font-family: var(--title-font, var(--serif));
  font-size: 2rem;
  font-style: italic;
  line-height: 1.25;
  overflow-wrap: break-word;
}

.title-sans { --title-font: var(--sans); }
.title-sans .label__title { font-style: normal; }

.label__hint {
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--paper);
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.2s var(--ease), max-height 0.2s var(--ease), margin-top 0.2s var(--ease);
}

.label__row:hover .label__hint,
.label__row:focus-visible .label__hint {
  opacity: 1;
  max-height: 1.2rem;
  margin-top: 0.15rem;
}

.label__byline,
.label__medium,
.label__meta {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  color: var(--paper);
  opacity: 0.85;
  margin: 0;
}

/* The "By: <artist>" line is primary information — give it a larger size than
   the medium/tags metadata below it. */
.label__byline {
  font-size: 1.05rem;
  opacity: 0.92;
}

/* Half-way through each slide, drop everything below the title + artist so the
   artwork gets more room. Content stays in the DOM (not display:none) so screen
   readers can still reach it — this is a purely visual collapse. The full label
   returns on the next slide. */
.label.is-minimized .label__medium,
.label.is-minimized .label__meta,
.label.is-minimized .label__tags {
  max-height: 0;
  margin: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}

.label__medium {
  font-style: italic;
}

.label__byline #labelArtist,
.label__byline #labelOwner {
  font-weight: 600;
  opacity: 1;
}

.label__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.3rem 0 0;
  padding: 0;
  list-style: none;
}

.label__tags li {
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  background: rgba(237, 232, 222, 0.14);
  color: var(--paper);
}

.label-hide-btn {
  flex-shrink: 0;
  /* The tag glyph is small/hard to read, so make it noticeably larger, bolder,
     and more opaque than the neighbouring control icons. */
  font-size: 1.9rem;
  font-weight: 700;
  opacity: 0.9;
}

/* ───────────────────────── Stage controls ───────────────────────── */

/* Prev/next arrows share the bottom control row's look: a dark, opaque circle
   with a bright glyph, always visible for discoverability over any artwork. */
.nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 3.2rem;
  height: 3.2rem;
  border-radius: 50%;
  border: none;
  background: rgba(8, 7, 6, 0.62);
  color: #fff;
  font-size: 1.7rem;
  line-height: 1;
  opacity: 0.9;
  transition: opacity 0.25s var(--ease), background 0.2s var(--ease);
}

.nav:hover,
.nav:focus-visible {
  opacity: 1;
  background: rgba(8, 7, 6, 0.82);
}
.nav--prev { left: 1.5rem; }
.nav--next { right: 1.5rem; }

.icon-btn {
  /* inline-flex so the same class sizes/centres both <button> and <a> controls */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: none;
  background: rgba(20, 18, 16, 0.35);
  color: var(--paper);
  /* 2.75rem = 44px: meets WCAG 2.5.8 AAA target size (AA floor is 24px). */
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  font-size: 1.1rem;
  opacity: 0.55;
  transition: opacity 0.2s var(--ease), background 0.2s var(--ease);
}

.icon-btn:hover,
.icon-btn:focus-visible {
  opacity: 1;
  background: rgba(20, 18, 16, 0.6);
}

/* Active/toggled state: the label-hide button while the label is hidden, and
   the play/pause button while paused (both set aria-pressed="true"). Filled
   with paper so it reads clearly as "on" against the dark stage. */
.icon-btn[aria-pressed="true"] {
  opacity: 1;
  background: var(--paper);
  color: var(--ink);
}
.icon-btn[aria-pressed="true"]:hover,
.icon-btn[aria-pressed="true"]:focus-visible {
  background: var(--paper-deep);
}

/* ───────────────────────── Canvas tap play/pause indicator ─────────────────
   A transparent duplicate of the play/pause glyph that pops in the centre of
   the stage and fades out when the artwork is tapped. Decorative only. */

.tap-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5.5rem;
  height: 5.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.6rem;
  color: var(--paper);
  background: rgba(12, 11, 10, 0.5);
  transform: translate(-50%, -50%) scale(0.6);
  opacity: 0;
  pointer-events: none;
  z-index: 6;
}

.tap-indicator.is-active {
  animation: tap-pop 0.6s var(--ease) forwards;
}

@keyframes tap-pop {
  0%   { opacity: 0;   transform: translate(-50%, -50%) scale(0.6); }
  30%  { opacity: 0.9; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0;   transform: translate(-50%, -50%) scale(1.35); }
}

.stage-controls {
  position: absolute;
  bottom: 1.25rem; /* under the museum label */
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* The bottom control row floats over artwork that may be light, so give the
   idle (non-pressed) buttons a darker, more opaque circle and a brighter glyph
   than the default icon button. The pressed/active fill is left untouched. */
.stage-controls .icon-btn:not([aria-pressed="true"]) {
  background: rgba(8, 7, 6, 0.62);
  color: #fff;
  opacity: 0.92;
}
.stage-controls .icon-btn:not([aria-pressed="true"]):hover,
.stage-controls .icon-btn:not([aria-pressed="true"]):focus-visible {
  background: rgba(8, 7, 6, 0.82);
  opacity: 1;
}

.nav:focus-visible,
#settingsToggle:focus-visible,
#stagePlayPauseBtn:focus-visible,
#viewOnDaBtn:focus-visible,
#labelHideBtn:focus-visible,
.label__row:focus-visible {
  outline: 3px solid var(--gold-stage);
  outline-offset: 2px;
}

.btn:focus-visible,
.icon-btn:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--gold-ink);
  outline-offset: 2px;
}

/* Buttons that sit on the dark stage need the lighter gold ring to keep a
   visible 3:1 focus indicator (WCAG 2.4.7 / 1.4.11) — the darker gold-ink ring
   would all but vanish against near-black. Declared after the rule above so it
   wins for .quick-login-btn (which also matches .btn:focus-visible). */
.linklike:focus-visible,
.quick-login-btn:focus-visible {
  outline: 3px solid var(--gold-stage);
  outline-offset: 2px;
}

/* ───────────────────────── Settings panel ───────────────────────── */

.panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: var(--panel-width);
  max-width: 92vw;
  background: var(--paper);
  color: var(--ink);
  box-shadow: -1rem 0 3rem rgba(0, 0, 0, 0.35);
  transform: translateX(100%);
  transition: transform 0.35s var(--ease);
  overflow-y: auto;
  font-family: var(--sans);
}

.panel.is-open { transform: translateX(0); }

.panel__inner { padding: 1.5rem 1.5rem 3rem; }

.panel__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.panel__header h1 {
  /* Follows the artwork title-font setting (serif default / sans). */
  font-family: var(--title-font, var(--serif));
  font-style: italic;
  font-size: 1.5rem;
  margin: 0;
}
.title-sans .panel__header h1 { font-style: normal; }

.panel__header .icon-btn {
  background: transparent;
  color: var(--ink);
  opacity: 0.75;
}
.panel__header .icon-btn:hover,
.panel__header .icon-btn:focus-visible {
  background: rgba(22, 21, 20, 0.08);
  opacity: 1;
}

.panel__section {
  border-top: 1px solid var(--paper-deep);
  padding: 1.25rem 0;
}
.panel__section:first-of-type { border-top: none; padding-top: 0; }

.panel__section h2 {
  font-family: var(--sans);
  font-size: 0.86rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink); /* darkened from gold for clearer contrast on the paper panel */
  font-weight: 700;
  margin: 0 0 0.85rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  margin-bottom: 0.85rem;
}

.field > span { color: var(--ink-soft); font-size: 0.78rem; }

.field--row {
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
}
.field--row > span { font-size: 0.85rem; color: var(--ink); }

input[type="text"],
input[type="number"],
input[type="date"],
select {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  border-radius: 0.25rem;
}

input[type="checkbox"] {
  width: 1.5rem;
  height: 1.5rem;
  accent-color: var(--gold-ink);
  flex-shrink: 0;
}

/* Touch-friendly number stepper: big −/+ buttons flanking the field, with the
   tiny native spinners removed. */
.stepper {
  display: flex;
  align-items: stretch;
  gap: 0.4rem;
}
.stepper__btn {
  flex: 0 0 auto;
  width: 3rem;
  min-height: 2.75rem; /* ≥44px touch target (WCAG 2.5.5) */
  font-size: 1.4rem;
  line-height: 1;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  border-radius: 0.25rem;
}
.stepper__btn:hover { background: var(--paper); }
.stepper__btn:active { background: var(--paper-deep); }
.stepper input[type="number"] {
  flex: 1 1 auto;
  width: 100%;
  text-align: center;
  font-size: 1.05rem;
  -moz-appearance: textfield;
  appearance: textfield;
}
.stepper input[type="number"]::-webkit-outer-spin-button,
.stepper input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.date-range {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.date-range input[type="date"] { flex: 1 1 auto; min-width: 0; }
.date-range > span { color: var(--ink-soft); }

.btn {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.65rem 1rem;
  border: none;
  border-radius: 0.3rem;
  background: var(--ink);
  color: var(--paper);
  width: 100%;
  margin-top: 0.25rem;
  transition: background 0.2s var(--ease);
}
.btn:hover { background: var(--ink-soft); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}
.btn--ghost:hover { background: rgba(0,0,0,0.05); }

/* For ghost buttons that sit on the dark stage rather than the paper panel —
   needs light text/border instead. */
.btn--ghost-stage {
  background: transparent;
  color: var(--paper);
  border: 1px solid var(--paper);
  width: auto;
  padding: 0.65rem 1.25rem;
}
.btn--ghost-stage:hover { background: rgba(237, 232, 222, 0.12); }

/* ───────────────────────── Mature-content consent gate ───────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(12, 11, 10, 0.6);
}

.modal {
  width: 26rem;
  max-width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--paper);
  color: var(--ink);
  border-radius: 0.5rem;
  padding: 1.5rem;
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.45);
  font-family: var(--sans);
}

.modal h2 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.3rem;
  margin: 0 0 0.75rem;
}

.modal p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin: 0 0 1.1rem;
}

.modal__consent-row {
  align-items: flex-start;
  margin-bottom: 1.25rem;
}
.modal__consent-row > span { font-size: 0.85rem; color: var(--ink); }

.modal__actions {
  display: flex;
  gap: 0.6rem;
}
.modal__actions .btn { width: auto; flex: 1 1 auto; margin-top: 0; }

.modal .btn:disabled {
  background: var(--ink-soft);
  opacity: 0.45;
  cursor: not-allowed;
}

.modal:focus-visible,
.modal__actions .btn:focus-visible,
.modal__consent-row input:focus-visible {
  outline: 3px solid var(--gold-ink);
  outline-offset: 2px;
}

/* Prominent sign-in CTA shown on the signed-out landing. White card with dark
   text so it reads clearly against the near-black stage. Must come after .btn
   so it overrides the dark-background default. */
.quick-login-btn {
  background: #fff !important;
  color: var(--ink) !important;
  margin: 0;
}
.quick-login-btn:hover { background: #e9e4da !important; }

.muted { color: var(--ink-soft); font-size: 0.92rem; margin: 0.4rem 0; }
.muted.small { font-size: 0.82rem; line-height: 1.45; }

.panel__footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(22, 21, 20, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.72rem;
  color: var(--ink-soft);
}
.panel__repo {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}
.panel__repo:hover { color: var(--gold-ink); }

/* Share buttons wrap into a compact grid; the network links are auto-width
   ghost buttons rather than the full-width default. */
.share-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.share-links .btn {
  width: auto;
  margin-top: 0;
  padding: 0.4rem 0.7rem;
  font-size: 0.8rem;
}
.share-links [aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
}

/* ───────────────────────── Small screens ───────────────────────── */

@media (max-width: 480px) {
  /* Keep the base centering (left:50% + translateX(-50%)); only adjust spacing
     and width so the card never runs off-screen. */
  .label-wrap { bottom: 4rem; width: calc(100vw - 1.5rem); }
  .stage-controls { bottom: 0.75rem; }
  .label { padding: 0.75rem 0.9rem 0.7rem; }
  .label__title { font-size: 1rem; }
  .label__byline { font-size: 0.85rem; }
  /* On a phone the viewer is already on the device — the QR is for unattended
     big screens, so reclaim the space. */
  .label__qr { display: none; }
  /* Keep nav arrows at the 44px AAA touch target on phones, where touch is the
     primary input. */
  .nav { width: 2.75rem; height: 2.75rem; font-size: 1.4rem; }
  .tap-indicator { width: 4.5rem; height: 4.5rem; font-size: 2.1rem; }
}