/* =========================
   Theme Tokens
   ========================= */
:root {
  /* DARK (base = #180a0f) */
  --bg:    #180a0f;  /* wine-black */
  --panel: #241621;  /* lifted card surface */
  --text:  #f2ecf2;  /* warm near-white */
  --muted: #b39aa5;  /* warm grey for secondary text */
  --hair:  rgba(255,255,255,.10);

  --brand: #8e6cff;  /* purple accent that pops on dark */
  --accent:#11b6c6;  /* teal accent */

  --mark-emoji:    #ffd479;
  --mark-nonascii: #70e0b6;
  --mark-rtl:      #7ab6ff;
  --mark-comb:     #f59ada;
  --mark-ctrl:     #ff8c8c;

  --radius: 14px;
  --focus-ring: 0 0 0 3px rgba(142,108,255,.50);

  /* I/O sizing */
  --io-box-height: clamp(12rem, 40vh, 22rem);

  /* Scrollbars (dark) */
  --scroll-track: #241621;
  --scroll-thumb: #8e6cff;
  --scroll-thumb-hover: #a88cff;
}

:root[data-theme="light"] {
  /* LIGHT (subtle tint of the same base, not plain white) */
  --bg:    #ffe6f0;  /* pale rosé paper */
  --panel: #fff2f7;  /* one step lighter, keeps the tint */
  --text:  #2a1620;  /* plum-leaning body text */
  --muted: #6f5b64;  /* muted plum-grey with enough contrast */
  --hair:  rgba(0,0,0,.10);

  --brand: #6e4fe6;  /* deeper purple for contrast */
  --accent:#0e97a6;  /* teal tuned for light bg */

  --mark-emoji:    #fbbf24;
  --mark-nonascii: #10b981;
  --mark-rtl:      #3b82f6;
  --mark-comb:     #ec4899;
  --mark-ctrl:     #ef4444;

  --radius: 14px;
  --focus-ring: 0 0 0 3px rgba(110,79,230,.45);

  /* Scrollbars (light) — lighter thumb for a softer look */
  --scroll-track: #fff6fa;   /* slightly lighter than panel */
  --scroll-thumb: #cdbfff;   /* light lavender */
  --scroll-thumb-hover: #b9a6ff;
}

/* Respect system light if user hasn't explicitly toggled to dark */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg:    #ffe6f0;
    --panel: #fff2f7;
    --text:  #2a1620;
    --muted: #6f5b64;
    --hair:  rgba(0,0,0,.10);

    --brand: #6e4fe6;
    --accent:#0e97a6;

    --mark-emoji:    #fbbf24;
    --mark-nonascii: #10b981;
    --mark-rtl:      #3b82f6;
    --mark-comb:     #ec4899;
    --mark-ctrl:     #ef4444;

    --radius: 14px;
    --focus-ring: 0 0 0 3px rgba(110,79,230,.45);

    --scroll-track: #fff6fa;
    --scroll-thumb: #cdbfff;
    --scroll-thumb-hover: #b9a6ff;
  }
}

/* =========================
   Base & Layout
   ========================= */
html, body { height: 100%; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 3vw, 2rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

header {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.title {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: .2px;
}

.controls {
  display: flex;
  gap: .75rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn,
.toggle {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  padding: .55rem .8rem;
  cursor: pointer;
  transition: transform .05s ease, box-shadow .15s ease, background .2s ease;
}

.btn:hover,
.toggle:hover {
  box-shadow: 0 6px 18px rgba(0, 0, 0, .15);
}

.btn:focus-visible,
.toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 1100px) {
  .grid { grid-template-columns: 1fr 2fr; }
}

.card {
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .12);
  min-height: 140px;
}

.card h2 {
  margin: 0 0 .75rem;
  font-size: 1rem;
  color: var(--muted);
  letter-spacing: .2px;
}

/* === Text boxes & viewers: fixed height, vertical scroll, no horizontal creep === */
textarea,
.viewer {
  width: 100%;
  max-width: 100%;
  height: var(--io-box-height);
  max-height: 50vh;
  overflow-y: auto;
  overflow-x: auto;            /* horizontal only if truly necessary */
  scrollbar-gutter: stable;
  display: block;

  border: 1px dashed var(--hair);
  border-radius: calc(var(--radius) - 4px);
  padding: .9rem;
  background: color-mix(in oklab, var(--panel) 92%, transparent);
  color: var(--text);
  resize: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  line-height: 1.6;
}

.viewer {
  white-space: pre-wrap;
  word-wrap: break-word;
      margin-top: -1em;
}

.muted { color: var(--muted); }

.row {
  display: flex;
  gap: .75rem;
  align-items: center;
  flex-wrap: wrap;
  min-width: 0;
}
.row > * { min-width: 0; }

/* Legend + marks */
.stack { display: grid; gap: .5rem; }

.legend {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .5rem;
}

@media (min-width: 540px) {
  .legend { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  border: 1px solid var(--hair);
  padding: .35rem .6rem;
  border-radius: 999px;
  font-size: .9rem;
  background: rgba(255, 255, 255, .04);
  position: relative;
}

/* Glowing “LED” indicator */
.dot {
  width: .9rem;
  height: .9rem;
  border-radius: 50%;
  border: 1px solid var(--hair);
  background: radial-gradient(circle at 30% 30%,
              rgba(255,255,255,0.9) 0%,
              currentColor 40%,
              currentColor 100%);
  box-shadow:
    0 0 4px currentColor,
    inset 0 -1px 3px rgba(0,0,0,.6),
    inset 0 2px 4px rgba(255,255,255,.6);
}

/* Vibrant per-category colors (applied via currentColor) */
.d-emoji    { color: #ffd500; }
.d-nonascii { color: #00c853; }
.d-rtl      { color: #2979ff; }
.d-comb     { color: #d500f9; }
.d-ctrl     { color: #ff1744; }

/* Grey out when count is zero */
.pill.off .dot {
  color: #666;
  background: radial-gradient(circle at 30% 30%,
              rgba(255,255,255,0.6) 0%,
              #555 40%,
              #333 100%);
  box-shadow:
    inset 0 -1px 2px rgba(0,0,0,.7),
    inset 0 2px 3px rgba(255,255,255,.3);
}

.pill.off .badge {
  background: #777;
  color: #000;
  box-shadow: none;
}

mark { padding: 0 .12em; border-radius: .25em; box-decoration-break: clone; }
.m-emoji    { background: var(--mark-emoji); }
.m-nonascii { background: var(--mark-nonascii); }
.m-rtl      { background: var(--mark-rtl); }
.m-comb     { background: var(--mark-comb); }
.m-ctrl     { background: var(--mark-ctrl); }

/* File input — never push layout */
input[type="file"] {
  position: relative;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  padding: .5rem;
  background: var(--panel);
  color: var(--text);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Small utilities */
.space { height: .25rem; }

.counts {
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

.help { font-size: .92rem; color: var(--muted); }

.sep { height: 1px; background: var(--hair); margin: .5rem 0; }

/* --- Unilight Demo (scoped) --- */
#unilight-demo .wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem;
}

#unilight-demo h2 {
  margin: 0 0 .75rem;
  font-size: 1.1rem;
  color: var(--muted);
}
.file_input {
  margin: 0 0 .75rem;
  font-size: 1.1rem;
  color: var(--muted);
  margin-top: .5em;
}

#unilight-demo .grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  #unilight-demo .grid { grid-template-columns: 1fr 1fr; }
}

#unilight-demo .card {
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .06);
  min-height: 160px;
}

#unilight-demo .muted { color: var(--muted); }

#unilight-demo .legend {
  display: grid;
  gap: .5rem;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-bottom: .5rem;
}

#unilight-demo .pill {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  border: 1px solid var(--hair);
  padding: .35rem .55rem;
  border-radius: 999px;
  font-size: .87rem;
}

#unilight-demo .dot {
  width: .85rem; height: .85rem;
  border-radius: 50%;
  border: 1px solid var(--hair);
}

#unilight-demo .d-emoji    { background: var(--mark-emoji); }
#unilight-demo .d-nonascii { background: var(--mark-nonascii); }
#unilight-demo .d-rtl      { background: var(--mark-rtl); }
#unilight-demo .d-comb     { background: var(--mark-comb); }
#unilight-demo .d-ctrl     { background: var(--mark-ctrl); }

#unilight-demo .viewer {
  border: 1px dashed var(--hair);
  border-radius: 10px;
  padding: .9rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  white-space: pre-wrap;
  word-wrap: break-word;
  height: var(--io-box-height);
  max-height: 48vh;
  overflow-y: auto;
  scrollbar-gutter: stable;
  background: color-mix(in oklab, var(--panel) 92%, transparent);
}

#unilight-demo mark { padding: 0 .12em; border-radius: .25em; box-decoration-break: clone; }
#unilight-demo .m-emoji    { background: var(--mark-emoji); }
#unilight-demo .m-nonascii { background: var(--mark-nonascii); }
#unilight-demo .m-rtl      { background: var(--mark-rtl); }
#unilight-demo .m-comb     { background: var(--mark-comb); }
#unilight-demo .m-ctrl     { background: var(--mark-ctrl); }

#unilight-demo .row {
  display: flex;
  gap: .5rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  min-width: 0;
}

#unilight-demo .counts {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  margin: -1em 0 1.5em 0;
}

#unilight-demo .btn {
  background: color-mix(in oklab, var(--panel) 85%, transparent);
  border: 1px solid var(--hair);
  border-radius: 10px;
  padding: .45rem .7rem;
  cursor: pointer;
}

#unilight-demo .btn:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, .12);
}

#unilight-demo .title-row {
  display: flex;
  gap: .75rem;
  align-items: baseline;
  justify-content: space-between;
}

/* Inline chips by default (used in help text) */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 .3rem;
  min-width: 1.1rem;
  height: 1.1rem;
  line-height: 1;
  font-size: .7rem;
  font-weight: 600;
  color: #000;
  border: 1px solid var(--hair);
  border-radius: 999px;
  box-shadow: 0 0 0 2px var(--panel);
  position: static;
}

/* Corner counters only inside pills */
.pill .badge {
  position: absolute;
  top: -0.4rem;
  right: -0.4rem;
}

/* Failsafe for any straggler 1px horizontal bar on niche setups */
html, body { overflow-x: clip; }

/* make the demo’s inner wrap match the global one */
#unilight-demo .wrap {
  max-width: 1200px;
  padding: 0;
}

/* =========================
   Footer
   ========================= */
.site-footer {
  background: var(--panel);
  border-top: 1px solid var(--hair);
}

.site-footer .wrap {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: .9rem;
  color: var(--muted);
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover { text-decoration: underline; }

.intro {
  margin: 0 0 1.5rem;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--muted);
}

/* =========================
   Option Pills (highlight & cleanup)
   ========================= */
.options-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center;
}

.option-pill {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .35rem .75rem;
  border: 1px solid var(--hair);
  border-radius: 999px;
  background: var(--panel);
  cursor: pointer;
  font-size: .9rem;
  user-select: none;
  transition: background .2s, border-color .2s;
  white-space: nowrap;
}

.option-pill:hover {
  background: color-mix(in oklab, var(--panel) 85%, var(--brand) 15%);
  border-color: var(--brand);
}

.option-pill input {
  margin: 0;
  accent-color: var(--brand);
}

.option-pill .dot { flex: 0 0 .9rem; }

@media (max-width: 520px) {
  .option-pill {
    width: 100%;
    justify-content: flex-start;
  }
}

/* =========================
   File row: input + clear button inline
   ========================= */
.row input[type="file"] {
  flex: 0 0 auto;
  max-width: none;
  display: inline-block;
}
.row .btn { flex: 0 0 auto; }

.input-actions { flex-wrap: nowrap; }
.input-actions input[type="file"] {
  width: auto;
  max-width: none;
  flex: 0 1 auto;
  display: inline-block;
}
.input-actions .btn { flex: 0 0 auto; }

@media (min-width: 540px) {
  .input-actions input[type="file"] { max-width: 320px; }
}
button#clear-input:hover {
  background: color-mix(in oklab, var(--panel) 85%, var(--brand) 15%);
  border-color: var(--brand);
}

/* =========================
   Align Input + Output boxes on desktop
   ========================= */
@media (min-width: 900px) {
  :root { --pre-row-height: 56px; --io-gap: .5rem; }

  section[aria-labelledby="inputTitle"],
  section[aria-labelledby="outputTitle"] {
    display: grid;
    row-gap: var(--io-gap);
  }

  section[aria-labelledby="inputTitle"] .row:first-of-type {
    align-items: center;
    min-height: var(--pre-row-height);
  }
  section[aria-labelledby="outputTitle"] .legend {
    align-items: center;
    min-height: var(--pre-row-height);
    margin: 0;
  }

  section[aria-labelledby="inputTitle"] .space:first-of-type,
  section[aria-labelledby="outputTitle"] .space:first-of-type { display: none; }
}

/* =========================
   Scrollbars (themed)
   ========================= */
/* WebKit browsers (Chrome, Edge, Safari) */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--scroll-track); }
*::-webkit-scrollbar-thumb {
  background-color: var(--scroll-thumb);
  border-radius: 6px;
  border: 2px solid var(--scroll-track);
}
*::-webkit-scrollbar-thumb:hover { background-color: var(--scroll-thumb-hover); }

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) var(--scroll-track);
}