:root {
  --bg: #0f1115;
  --bg-2: #161922;
  --bg-3: #1d2230;
  --line: #2a3040;
  --line-2: #394054;
  --fg: #e7eaf0;
  --fg-2: #9aa3b5;
  --fg-3: #6b7488;
  --accent: #6aa8ff;
  --accent-fg: #06101f;
  --ok: #4ec98a;
  --warn: #e3b341;
  --err: #f27272;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
:root[data-theme="light"] {
  --bg: #f7f8fa;
  --bg-2: #ffffff;
  --bg-3: #eef1f6;
  --line: #dde2ea;
  --line-2: #c6cdd9;
  --fg: #141821;
  --fg-2: #5b6474;
  --fg-3: #858d9c;
  --accent: #1f6feb;
  --accent-fg: #ffffff;
  --ok: #1a7f4b;
  --warn: #9a6700;
  --err: #c0362c;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.55 var(--sans);
  display: flex;
  flex-direction: column;
}

/* ---------- topbar ---------- */
.topbar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; color: var(--fg); text-decoration: none; letter-spacing: -.01em; }
.brand-mark { color: var(--accent); font-size: 19px; }
.search {
  flex: 1; max-width: 460px;
  background: var(--bg-3); color: var(--fg);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 7px 11px; font: inherit; font-size: 14px;
}
.search:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
.topbar .grow { flex: 1; }
.icon-btn {
  background: var(--bg-3); color: var(--fg-2);
  border: 1px solid var(--line); border-radius: 8px;
  width: 32px; height: 32px; cursor: pointer; font-size: 15px;
}
.icon-btn:hover { color: var(--fg); border-color: var(--line-2); }

.app { flex: 1; width: 100%; max-width: 1060px; margin: 0 auto; padding: 26px 18px 60px; }
.foot { border-top: 1px solid var(--line); padding: 16px 18px; color: var(--fg-3); font-size: 13px; text-align: center; }
.foot strong { color: var(--fg-2); font-weight: 600; }

/* ---------- home ---------- */
.hero { margin: 8px 0 30px; }
.hero h1 { font-size: 30px; line-height: 1.2; margin: 0 0 8px; letter-spacing: -.02em; }
.hero p { margin: 0; color: var(--fg-2); max-width: 62ch; }

.area { margin-bottom: 30px; }
.area > h2 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .09em;
  color: var(--fg-3); margin: 0 0 10px; font-weight: 650;
}
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(232px, 1fr)); gap: 10px; }
.card {
  display: block; text-decoration: none; color: inherit;
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 13px 14px;
  transition: border-color .12s, transform .12s;
}
.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card b { display: block; font-weight: 600; font-size: 14.5px; margin-bottom: 3px; }
.card span { color: var(--fg-2); font-size: 13px; line-height: 1.45; }
.empty { color: var(--fg-2); padding: 30px 0; }

/* ---------- tool page ---------- */
.crumb { font-size: 13px; color: var(--fg-3); margin-bottom: 12px; }
.crumb a { color: var(--fg-2); text-decoration: none; }
.crumb a:hover { color: var(--accent); }
.tool-head { margin-bottom: 20px; }
.tool-head h1 { font-size: 23px; margin: 0 0 5px; letter-spacing: -.015em; }
.tool-head p { margin: 0; color: var(--fg-2); }

.panel {
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px; margin-bottom: 14px;
}
.panel > h3 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--fg-3); margin: 0 0 12px; font-weight: 650;
}

/* dropzone */
.dz {
  border: 1.5px dashed var(--line-2); border-radius: var(--radius);
  padding: 34px 20px; text-align: center; color: var(--fg-2);
  cursor: pointer; transition: border-color .12s, background .12s;
  background: var(--bg-2);
}
.dz:hover, .dz.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, var(--bg-2)); }
.dz strong { display: block; color: var(--fg); font-size: 15px; margin-bottom: 4px; font-weight: 600; }
.dz small { color: var(--fg-3); }

/* params */
.params { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 13px 16px; }
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field > label { font-size: 12.5px; color: var(--fg-2); font-weight: 550; }
.field .hint { font-size: 11.5px; color: var(--fg-3); }
.field input[type="text"], .field input[type="number"], .field select, .field textarea {
  background: var(--bg-3); color: var(--fg); border: 1px solid var(--line);
  border-radius: 7px; padding: 7px 9px; font: inherit; font-size: 14px; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.field.row { flex-direction: row; align-items: center; gap: 8px; }
.field.row > label { order: 2; }
.field input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); flex: none; }
.range-wrap { display: flex; align-items: center; gap: 10px; }
.range-wrap input[type="range"] { flex: 1; accent-color: var(--accent); min-width: 0; }
.range-val { font: 13px var(--mono); color: var(--fg); min-width: 46px; text-align: right; }
.field.wide { grid-column: 1 / -1; }

/* buttons */
.btn {
  background: var(--accent); color: var(--accent-fg);
  border: 1px solid transparent; border-radius: 8px;
  padding: 8px 15px; font: inherit; font-weight: 600; font-size: 14px; cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .45; cursor: not-allowed; filter: none; }
.btn.ghost { background: var(--bg-3); color: var(--fg); border-color: var(--line); font-weight: 550; }
.btn.ghost:hover { border-color: var(--line-2); filter: none; }
.btn.sm { padding: 5px 10px; font-size: 13px; }
.actions { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.actions .spacer { flex: 1; }

/* file list */
.files { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.files li {
  display: grid; grid-template-columns: 34px 1fr auto auto auto;
  gap: 11px; align-items: center; padding: 9px 4px;
  border-bottom: 1px solid var(--line);
}
.files li:last-child { border-bottom: 0; }
.thumb {
  width: 34px; height: 34px; border-radius: 6px; object-fit: cover;
  background: var(--bg-3); border: 1px solid var(--line);
  display: grid; place-items: center; font-size: 10px; color: var(--fg-3);
  overflow: hidden; flex: none;
}
.fname { min-width: 0; }
.fname b { display: block; font-weight: 550; font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fname span { font-size: 12px; color: var(--fg-3); }
.fsize { font: 12.5px var(--mono); color: var(--fg-2); white-space: nowrap; text-align: right; }
.delta { font: 12px var(--mono); padding: 1px 6px; border-radius: 20px; white-space: nowrap; }
.delta.good { color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); }
.delta.bad { color: var(--warn); background: color-mix(in srgb, var(--warn) 15%, transparent); }
.status { font-size: 12px; color: var(--fg-3); white-space: nowrap; }
.status.err { color: var(--err); }
.x-btn { background: none; border: 0; color: var(--fg-3); cursor: pointer; font-size: 16px; padding: 0 4px; line-height: 1; }
.x-btn:hover { color: var(--err); }

.bar { height: 3px; background: var(--bg-3); border-radius: 3px; overflow: hidden; margin-top: 12px; }
.bar > i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .18s; }

/* text tool */
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 760px) { .io { grid-template-columns: 1fr; } }
.io textarea, textarea.code {
  width: 100%; min-height: 260px; resize: vertical;
  background: var(--bg-3); color: var(--fg);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 11px;
  font: 13px/1.5 var(--mono); tab-size: 2;
  white-space: pre; overflow-wrap: normal; overflow-x: auto;
}
.io textarea:focus, textarea.code:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.io-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; min-height: 28px; }
.io-head label { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--fg-3); font-weight: 650; }
.io-head .spacer { flex: 1; }

.msg { border-radius: 8px; padding: 9px 12px; font-size: 13.5px; margin-top: 12px; border: 1px solid; }
.msg.err { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); background: color-mix(in srgb, var(--err) 10%, transparent); }
.msg.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); background: color-mix(in srgb, var(--ok) 10%, transparent); }
.msg.info { color: var(--fg-2); border-color: var(--line); background: var(--bg-3); }
.msg code { font: 12.5px var(--mono); }

.note { font-size: 12.5px; color: var(--fg-3); margin-top: 10px; }
kbd { font: 11.5px var(--mono); background: var(--bg-3); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px; padding: 1px 5px; }

/* shared bits for custom tools */
.tabs { display: flex; gap: 4px; margin-bottom: 14px; border-bottom: 1px solid var(--line); }
.tab { background: none; border: 0; border-bottom: 2px solid transparent; color: var(--fg-2); padding: 7px 12px; margin-bottom: -1px; cursor: pointer; font: inherit; font-size: 13.5px; font-weight: 550; }
.tab.on { color: var(--fg); border-bottom-color: var(--accent); }
table.kv { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.kv td { padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.kv tr:last-child td { border-bottom: 0; }
table.kv td:first-child { color: var(--fg-2); width: 140px; white-space: nowrap; }
table.kv td.v { font: 12.5px var(--mono); word-break: break-all; }

/* colour tool */
.swatch { height: 92px; border-radius: 8px; border: 1px solid var(--line); }
.shades { display: grid; grid-template-columns: repeat(11, 1fr); gap: 3px; margin-top: 10px; }
.shades > div { height: 40px; border-radius: 4px; cursor: pointer; }

/* regex tool */
.hl { background: color-mix(in srgb, var(--accent) 35%, transparent); border-radius: 2px; outline: 1px solid color-mix(in srgb, var(--accent) 60%, transparent); }
pre.out {
  margin: 0; background: var(--bg-3); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 11px; font: 13px/1.5 var(--mono);
  white-space: pre-wrap; word-break: break-word; max-height: 340px; overflow: auto;
}

/* diff tool */
.diff { font: 12.5px/1.6 var(--mono); border: 1px solid var(--line); border-radius: 8px; overflow: auto; max-height: 560px; background: var(--bg-3); }
.diff .ln { display: grid; grid-template-columns: 48px 48px 1fr; gap: 0; }
.diff .ln > i { color: var(--fg-3); text-align: right; padding: 0 8px; font-style: normal; user-select: none; }
.diff .ln > code { padding: 0 10px; white-space: pre-wrap; word-break: break-word; }
.diff .add { background: color-mix(in srgb, var(--ok) 16%, transparent); }
.diff .del { background: color-mix(in srgb, var(--err) 16%, transparent); }

/* qr */
.qr-out { display: grid; place-items: center; padding: 18px; background: #fff; border-radius: 8px; border: 1px solid var(--line); }
.qr-out svg, .qr-out canvas { max-width: 100%; height: auto; }

/* ---------- generated page prose (SEO content, no JS needed) ---------- */
.prose {
  margin-top: 38px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  color: var(--fg-2);
}
.prose > h2 {
  font-size: 17px; color: var(--fg); font-weight: 650;
  margin: 30px 0 11px; letter-spacing: -.01em;
}
.prose > h2:first-child { margin-top: 0; }
.prose p, .prose ol, .prose .faq { max-width: 70ch; }
.prose p { margin: 0 0 13px; line-height: 1.68; }
.prose ol { margin: 0 0 13px; padding-left: 22px; }
.prose li { margin-bottom: 7px; line-height: 1.62; }
.prose .faq { margin: 0; }
.prose .faq dt { color: var(--fg); font-weight: 600; margin-top: 16px; line-height: 1.5; }
.prose .faq dt:first-child { margin-top: 0; }
.prose .faq dd { margin: 6px 0 0; line-height: 1.62; }
.prose .grid { margin-top: 4px; }
.card[hidden], .area[hidden] { display: none; }

/* ---------- PDF organiser ---------- */
.pages {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px; margin-bottom: 4px;
}
.page {
  margin: 0; position: relative; background: var(--bg-3);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px;
  cursor: grab; transition: border-color .12s, opacity .12s;
}
.page:hover { border-color: var(--line-2); }
.page.dragging { opacity: .4; cursor: grabbing; }
.page.out { opacity: .32; }
.page.out .page-thumb { filter: grayscale(1); }
.page-thumb {
  display: grid; place-items: center; min-height: 120px;
  transition: transform .18s;
}
.page-thumb canvas {
  max-width: 100%; height: auto; display: block;
  background: #fff; border: 1px solid var(--line); border-radius: 3px;
}
.page figcaption {
  display: flex; align-items: baseline; gap: 6px;
  margin-top: 8px; font-size: 12.5px; color: var(--fg-2);
}
.page figcaption span { font-weight: 650; color: var(--fg); }
.page figcaption small { color: var(--fg-3); font-size: 11px; }
.page-tools {
  position: absolute; top: 6px; right: 6px; display: flex; gap: 2px;
  background: color-mix(in srgb, var(--bg-2) 85%, transparent);
  border-radius: 6px; opacity: 0; transition: opacity .12s;
}
.page:hover .page-tools, .page.out .page-tools { opacity: 1; }

/* ---------- presets ---------- */
.presets { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-bottom: 14px; }
.presets .hint { font-size: 12px; color: var(--fg-3); margin-right: 2px; }

/* ---------- before / after ---------- */
.cmp {
  position: fixed; inset: 0; z-index: 50; display: grid; place-items: center;
  background: color-mix(in srgb, #000 68%, transparent); padding: 20px;
}
.cmp-box {
  background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; max-width: min(1000px, 96vw); max-height: 92vh; overflow: auto;
}
.cmp-head { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--fg-2); margin-bottom: 10px; }
.cmp-head .spacer { flex: 1; }
.cmp-stage {
  position: relative; line-height: 0;
  background: repeating-conic-gradient(var(--bg-3) 0 25%, var(--bg-2) 0 50%) 50%/20px 20px;
  border-radius: 8px; overflow: hidden;
}
.cmp-stage > img, .cmp-after > img { display: block; width: 100%; height: auto; }
.cmp-after { position: absolute; inset: 0; }
.cmp-range {
  position: absolute; left: 0; right: 0; bottom: 10px; width: calc(100% - 24px);
  margin: 0 12px; accent-color: var(--accent);
}
.files li.dragging { opacity: .4; }

/* ---------- visual crop ---------- */
.strip { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 8px; margin-bottom: 10px; }
.strip-item {
  flex: none; width: 58px; height: 58px; padding: 0; cursor: pointer;
  background: var(--bg-3); border: 2px solid var(--line); border-radius: 7px; overflow: hidden;
}
.strip-item.on { border-color: var(--accent); }
.strip-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.crop-stage {
  position: relative; line-height: 0; user-select: none; touch-action: none;
  background: repeating-conic-gradient(var(--bg-3) 0 25%, var(--bg-2) 0 50%) 50%/20px 20px;
  border-radius: 8px; overflow: hidden; cursor: crosshair;
}
.crop-stage > img { display: block; width: 100%; height: auto; max-height: 62vh; object-fit: contain; }
.crop-shade {
  position: absolute; pointer-events: none;
  box-shadow: 0 0 0 9999px color-mix(in srgb, #000 58%, transparent);
}
.crop-box { position: absolute; outline: 1px solid var(--accent); cursor: move; }
.crop-box::before, .crop-box::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  border-left: 1px dashed color-mix(in srgb, #fff 55%, transparent);
  border-right: 1px dashed color-mix(in srgb, #fff 55%, transparent);
  margin: 0 33.33%;
}
.crop-box::after {
  border: 0; border-top: 1px dashed color-mix(in srgb, #fff 55%, transparent);
  border-bottom: 1px dashed color-mix(in srgb, #fff 55%, transparent);
  margin: 33.33% 0;
}
.grip {
  position: absolute; width: 14px; height: 14px; background: var(--accent);
  border: 2px solid #fff; border-radius: 3px;
}
.grip.nw { left: -7px; top: -7px; cursor: nwse-resize; }
.grip.ne { right: -7px; top: -7px; cursor: nesw-resize; }
.grip.sw { left: -7px; bottom: -7px; cursor: nesw-resize; }
.grip.se { right: -7px; bottom: -7px; cursor: nwse-resize; }

/* ---------- character limits ---------- */
.limit { display: grid; grid-template-columns: 150px 1fr 90px; gap: 10px; align-items: center; margin-bottom: 8px; font-size: 13px; color: var(--fg-2); }
.limit .bar { margin: 0; }
.limit .status { text-align: right; }
details.panel summary::marker { color: var(--fg-3); }

/* ---------- language switcher ---------- */
.langs { display: flex; gap: 2px; align-items: center; }
.lang {
  font-size: 12px; font-weight: 600; letter-spacing: .01em;
  padding: 5px 8px; border-radius: 6px; text-decoration: none;
  color: var(--fg-3);
}
a.lang:hover { color: var(--fg); background: var(--bg-3); }
.lang.on { color: var(--fg); background: var(--bg-3); }
@media (max-width: 640px) {
  .langs { display: none; }
}