/* imgoji docs tool. restrained and technical: monospace structure on warm
   paper, monochrome chrome so the emoji outputs carry the colour. System fonts only. */

:root {
  --bg: #f5f5f3;            /* warm paper */
  --surface: #ffffff;
  --ink: #1b1a17;           /* near-black, warm */
  --muted: #6a675f;
  --faint: #9b978d;
  --line: #e4e2db;          /* hairline */
  --line-2: #cfccc2;        /* stronger hairline / input border */
  --dark: #17150f;          /* warm near-black viewport for images + grid */
  --dark-ink: #cbc6b9;      /* text on dark */
  --radius: 6px;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --emoji: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji";
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, canvas { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }

:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; border-radius: 2px; }

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

.container { width: 100%; max-width: 720px; margin-inline: auto; padding-inline: 20px; }

/* ---------- header ---------- */
.site-header {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  max-width: 720px; margin-inline: auto; padding: 22px 20px 14px;
  border-bottom: 1px solid var(--line);
}
.brand { font-family: var(--mono); font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand .mark { margin-right: 0.15em; }
.site-header nav { display: flex; gap: 0.9rem; }
.site-header nav a {
  font-family: var(--mono); font-size: 0.8rem; color: var(--muted);
  text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-2);
}
.site-header nav a:hover { color: var(--ink); text-decoration-color: var(--ink); }

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 50;
  background: var(--ink); color: var(--bg); padding: 8px 14px;
  border-radius: var(--radius); font-size: 0.85rem; transition: top 0.15s;
}
.skip-link:focus { top: 12px; }

/* ---------- intro + tabs + panels ---------- */
.intro { color: var(--muted); font-size: 0.95rem; margin: 22px 0 18px; max-width: 58ch; }
main { padding-bottom: 24px; }

.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--line); }
.tabs button {
  font-family: var(--mono); font-size: 0.92rem; padding: 10px 16px;
  background: none; border: 0; border-bottom: 2px solid transparent;
  color: var(--muted); cursor: pointer; margin-bottom: -1px;
}
.tabs button:hover { color: var(--ink); }
.tabs button.active { color: var(--ink); border-bottom-color: var(--ink); }

.picker { padding-top: 20px; }
.panel { padding-top: 20px; }

.sec-head { margin-bottom: 16px; }
.sec-head h2 { font-size: 1.05rem; font-weight: 600; margin: 3px 0 4px; letter-spacing: -0.01em; }

/* ---------- buttons ---------- */
.btn {
  font-weight: 600; font-size: 0.92rem; padding: 0.55rem 1rem;
  border-radius: var(--radius); border: 1px solid transparent; background: transparent;
  transition: background 0.12s, border-color 0.12s, opacity 0.12s;
}
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.primary:hover { background: #000; }
.btn.primary:disabled { opacity: 0.45; cursor: default; }
.btn.ghost { border-color: var(--line-2); color: var(--ink); }
.btn.ghost:hover { border-color: var(--ink); }
.btn.sm { padding: 0.32rem 0.7rem; font-size: 0.8rem; }

/* ---------- fields ---------- */
.field { display: grid; gap: 0.35rem; }
.field-row { display: flex; align-items: baseline; justify-content: space-between; gap: 0.6rem; }
.field-label { font-weight: 600; font-size: 0.88rem; }
.field .opt { color: var(--faint); font-size: 0.76rem; }
.field .val { font-family: var(--mono); font-size: 0.8rem; color: var(--ink); }

input[type="range"] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 4px;
  background: var(--line-2); border-radius: 2px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--ink); border: 2px solid var(--surface); box-sizing: content-box;
}
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%; background: var(--ink);
  border: 2px solid var(--surface);
}
input[type="range"]:focus-visible { outline-offset: 6px; }

input[type="text"], .mono-input, select {
  font-family: var(--mono); font-size: 0.92rem;
  background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 0.5rem 0.6rem; color: var(--ink); width: 100%;
}
input[type="text"]::placeholder { color: var(--faint); }
input[type="text"]:focus, .mono-input:focus, select:focus { border-color: var(--ink); outline: none; }
select { width: auto; }

.field-inline { display: inline-flex; align-items: baseline; gap: 0.4rem; font-size: 0.85rem; color: var(--muted); font-weight: 600; }
.check { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; color: var(--muted); }
input[type="checkbox"] { accent-color: var(--ink); width: 15px; height: 15px; }

/* ---------- encode layout ---------- */
.encode-controls { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .encode-controls { grid-template-columns: 210px 1fr; } }

.encode-left { display: grid; gap: 6px; align-content: start; }
.img-name { font-family: var(--mono); font-size: 0.78rem; color: var(--faint); min-height: 1em; word-break: break-all; }
.note { font-size: 0.8rem; color: var(--muted); line-height: 1.4; margin-top: 8px; }

.dropzone {
  position: relative; display: block; border: 1px dashed var(--line-2); border-radius: var(--radius);
  background: var(--surface); padding: 6px; cursor: pointer;
  transition: border-color 0.12s;
}
.dropzone.drag { border-color: var(--ink); }
.dropzone canvas { width: 100%; aspect-ratio: 1; image-rendering: auto; background: var(--dark); border-radius: 3px; }
.dz-overlay {
  position: absolute; inset: 6px; display: grid; place-items: center; text-align: center;
  background: rgba(23, 21, 15, 0.6); color: var(--dark-ink); border-radius: 3px;
  font-family: var(--mono); font-size: 0.8rem; padding: 8px; pointer-events: none;
}
.dropzone:not(.empty) .dz-overlay { opacity: 0; }

.encode-fields { display: grid; gap: 14px; align-content: start; }
.samples { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.5rem; font-size: 0.82rem; color: var(--muted); }
.samples span { font-family: var(--mono); font-size: 0.76rem; }
.samples button {
  font-family: var(--mono); font-size: 0.8rem; padding: 0;
  color: var(--ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line-2);
}
.samples button:hover { text-decoration-color: var(--ink); }
.encode-actions { display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap; }

/* ---------- result ---------- */
.result { margin-top: 18px; display: grid; gap: 8px; }
.recon-wrap { display: grid; place-items: center; }
.recon-wrap canvas { width: 100%; max-width: 320px; aspect-ratio: 1; image-rendering: auto; }

/* dark viewport surface for images, the viewer, and the grid */
.viewport { background: var(--dark); border-radius: var(--radius); padding: 10px; }
.viewer-wrap { width: fit-content; max-width: 100%; margin-inline: auto; }
.viewer-wrap imgoji-viewer { display: block; width: 300px; height: 300px; max-width: 100%; }

/* ---------- outputs ---------- */
.outwrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--surface); margin-top: 14px; }
.outwrap.dark { background: var(--dark); border-color: #2a261c; }
.out-head { display: flex; align-items: center; justify-content: space-between; padding: 0.45rem 0.7rem; border-bottom: 1px solid var(--line); }
.outwrap.dark .out-head { border-bottom-color: #2a261c; }
.out-head span { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); text-transform: lowercase; letter-spacing: 0.02em; }
.outwrap.dark .out-head span { color: var(--dark-ink); }
/* the ghost Copy button must stay legible on the dark grid panel */
.outwrap.dark .btn.ghost { color: var(--dark-ink); border-color: #4a4434; }
.outwrap.dark .btn.ghost:hover { color: #fff; border-color: var(--dark-ink); }

.out {
  display: block; padding: 0.8rem; font-family: var(--mono), var(--emoji);
  font-size: 1rem; line-height: 1.5; white-space: pre-wrap; word-break: break-word;
  max-height: 280px; overflow: auto;
}
.out:empty::before { content: "encode an image to see the string."; color: var(--faint); font-style: italic; font-family: var(--sans); font-size: 0.9rem; }

/* the grid panel breaks out of the 720px column so wide grids use the window,
   and grows tall enough to show every row instead of scrolling at 420px */
.full-bleed { width: 100vw; margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); }
.full-bleed .outwrap { max-width: 1120px; margin-inline: auto; }
.grid-out {
  margin: 0; padding: 0.8rem; font-family: var(--mono), var(--emoji);
  font-size: 0.85rem; line-height: 1; white-space: pre; overflow: auto;
  color: var(--ink);
}
.outwrap.dark .grid-out { color: var(--dark-ink); }
.grid-out:empty::before { content: "make a grid to see it here."; color: var(--faint); font-style: italic; font-family: var(--sans); font-size: 0.9rem; }

/* ---------- status + stats ---------- */
.status { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); min-height: 1.1em; }
.stats { font-family: var(--mono); font-size: 0.82rem; color: var(--muted); text-align: center; }

/* ---------- render stage + example gallery ---------- */
.render-stage { display: grid; gap: 16px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 700px) { .render-stage { grid-template-columns: minmax(0, 380px) 1fr; } }
.viewer-col { display: grid; gap: 10px; }
.prefix-control { display: flex; align-items: center; gap: 0.7rem; }
.prefix-control input[type="range"] { flex: 1; }
.prefix-count { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); white-space: nowrap; }
.viewer-stage { padding: 12px; }
.viewer-stage imgoji-viewer { display: block; width: 100%; height: auto; aspect-ratio: 1; }
.render-side { display: grid; gap: 10px; align-content: start; }
.string-in {
  font-family: var(--mono), var(--emoji); font-size: 0.92rem; line-height: 1.5;
  background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 0.6rem; color: var(--ink); width: 100%; min-height: 180px; resize: vertical;
}
.string-in:focus { border-color: var(--ink); outline: none; }
.render-actions { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }

.examples { margin-top: 22px; }
.examples-label { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); margin-bottom: 10px; }
.gallery { display: flex; flex-wrap: wrap; gap: 12px; }
.example { display: grid; gap: 6px; padding: 0; background: none; border: 0; cursor: pointer; }
.example img { width: 96px; height: 96px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--line-2); display: block; }
.example span { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); text-align: center; }
.example:hover img { border-color: var(--ink); }
.example:hover span { color: var(--ink); }

.grid-controls { display: flex; align-items: center; gap: 0.8rem 1rem; flex-wrap: wrap; }

/* advanced parameters panel */
.advanced { border-top: 1px dashed var(--line); padding-top: 12px; }
.advanced > summary { cursor: pointer; list-style: none; font-family: var(--mono); font-size: 0.8rem; color: var(--muted); user-select: none; }
.advanced > summary::-webkit-details-marker { display: none; }
.advanced > summary::before { content: "+ "; }
.advanced[open] > summary::before { content: "\2013 "; }
.adv-grid { display: grid; gap: 12px; grid-template-columns: 1fr; margin-top: 10px; }
@media (min-width: 480px) { .adv-grid { grid-template-columns: 1fr 1fr; } }
.adv { display: grid; gap: 4px; font-size: 0.8rem; color: var(--muted); font-weight: 600; }
.adv-wide { grid-column: 1 / -1; }
.adv-wide input[type="range"] { margin-top: 0.2rem; }
.adv select { width: 100%; max-width: 140px; }
.adv-val { font-family: var(--mono); font-size: 0.78rem; color: var(--ink); }
.adv-note { font-size: 0.76rem; color: var(--faint); margin-top: 10px; line-height: 1.4; max-width: 60ch; }
#advReset { justify-self: start; }

/* detected-emoji readout (grid Advanced) — monochrome chrome; the glyph carries the color */
.det-section { margin-top: 14px; }
.det-eyebrow { font-family: var(--mono); font-size: 0.76rem; color: var(--faint); letter-spacing: 0.02em; }
.det-list { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 8px; }
.det { display: inline-flex; align-items: center; gap: 9px; padding: 5px 10px 6px 8px;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.det-glyph { font-size: 1.25rem; line-height: 1; font-family: var(--emoji); }
.det-body { min-width: 76px; max-width: 168px; }
.det-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.det-label { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.det-score { font-family: var(--mono); font-size: 0.74rem; color: var(--ink); flex: none; }
.det-bar { height: 2px; background: var(--line); border-radius: 2px; overflow: hidden; margin-top: 4px; }
.det-bar i { display: block; height: 100%; background: var(--ink); }
.det-empty { font-family: var(--mono); font-size: 0.76rem; color: var(--faint); }

@media (max-width: 520px) {
  .site-header nav { gap: 0.7rem; }
  .viewer-wrap imgoji-viewer { width: 100%; height: auto; aspect-ratio: 1; }
}

/* ---- click-to-zoom modal on imgoji viewers ---- */
imgoji-viewer.zoomable { cursor: zoom-in; }
.zoom-overlay {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: rgba(8, 9, 14, 0.86);
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
}
.zoom-overlay .zoom-canvas {
  width: min(92vmin, 2048px); height: min(92vmin, 2048px);
  image-rendering: auto; background: #000;
  box-shadow: 0 12px 60px rgba(0, 0, 0, 0.55);
}
.zoom-overlay .zoom-loading {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  color: #d2d2d2; font: 600 0.95rem ui-sans-serif, system-ui, sans-serif; letter-spacing: 0.02em;
}
.zoom-overlay .zoom-close {
  position: absolute; top: 1rem; right: 1.25rem;
  width: 2.4rem; height: 2.4rem; border: 0; border-radius: 50%;
  background: rgba(255, 255, 255, 0.14); color: #fff;
  font: 600 1.6rem/1 ui-sans-serif, system-ui, sans-serif; cursor: pointer;
}
.zoom-overlay .zoom-close:hover { background: rgba(255, 255, 255, 0.26); }

/* ---- share: viewer drag-drop highlight + action row wrap ---- */
imgoji-viewer.drag { outline: 3px solid #1a3f8a; outline-offset: -3px; }
.render-actions { flex-wrap: wrap; row-gap: 0.3rem; }

/* ---- opt-in server share (short link / gallery) disclosure ---- */
.server-share { margin-top: 0.5rem; font-size: 0.82rem; }
.server-share > summary { cursor: pointer; color: var(--muted, #5a5a55); font-weight: 600; }
.server-note { font-size: 0.78rem; color: #5a5a55; margin: 0.4rem 0; max-width: 44ch; }
.server-share .chk { display: block; margin: 0.2rem 0; }
.server-share .chk input { margin-right: 0.35rem; }
.server-share .btn { margin-top: 0.4rem; }

/* ---------- public gallery (gallery tab) ---------- */
/* full-bleed tile grid; the dark viewport tiles match the site's image surfaces so
   the emoji composites carry the colour, per the monochrome-chrome convention */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  max-width: 1120px; margin-inline: auto;
}
.gtile {
  display: grid; gap: 7px; padding: 0; background: none; border: 0; cursor: pointer; text-align: left;
}
.gtile-frame { padding: 6px; outline: 1px solid transparent; outline-offset: 2px; transition: outline-color 0.12s; }
.gtile imgoji-viewer { display: block; width: 100%; height: auto; aspect-ratio: 1; }
.gtile-meta { font-family: var(--mono); font-size: 0.72rem; color: var(--faint); }
.gtile:hover .gtile-frame { outline-color: var(--ink); }
.gtile:hover .gtile-meta { color: var(--muted); }

/* shimmering placeholder while the gallery loads */
.gtile-skel { background: var(--dark); border-radius: var(--radius); aspect-ratio: 1; position: relative; overflow: hidden; }
.gtile-skel::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(203, 198, 185, 0.10), transparent);
  transform: translateX(-100%); animation: gskel 1.3s ease-in-out infinite;
}
@keyframes gskel { 100% { transform: translateX(100%); } }

/* full-width loading / empty / error message */
.gallery-msg {
  grid-column: 1 / -1; display: grid; gap: 10px; justify-items: center;
  padding: 2rem 1rem; text-align: center; color: var(--muted); font-size: 0.9rem;
  border: 1px dashed var(--line-2); border-radius: var(--radius); background: var(--surface);
}
.gallery-msg p { max-width: 42ch; }

@media (prefers-reduced-motion: reduce) {
  .gtile-skel::after { animation: none; opacity: 0.5; }
}