:root {
  --paper: #f4f1ea;
  --card: #fffdf8;
  --ink: #17140f;
  --muted: #6d665a;
  --line: #ddd6c8;
  --accent: #ff5a36;
  --accent-ink: #b8361a;
  --code-bg: #1d1a16;
  --code-ink: #efe8da;
  --k: #ff8f6b;
  --t: #7fd1b9;
  --s: #f2c46d;
  --c: #8a8274;
  --err: #c4291a;
  --ok: #2f7d55;
  --mono: 'JetBrains Mono', ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  background-image: radial-gradient(var(--line) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--ink);
  font: 16px/1.5 'Golos Text', system-ui, sans-serif;
}
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: 1320px;
  margin: 0 auto;
  padding: 28px 20px 18px;
}
.brand { display: flex; align-items: center; gap: 16px; min-width: 0; }
.logo {
  display: grid;
  place-items: center;
  flex: none;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  font: 700 22px var(--mono);
  box-shadow: 4px 4px 0 var(--ink);
}
h1 { margin: 0; font: 700 clamp(26px, 4vw, 34px)/1.1 Unbounded, sans-serif; letter-spacing: -0.02em; }
.brand p { margin: 4px 0 0; color: var(--muted); font-size: 15px; }
.gh {
  color: var(--ink);
  font-weight: 600;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.work {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 20px;
}
.pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: 16px;
  box-shadow: 6px 6px 0 var(--ink);
  overflow: hidden;
}
.pane-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 14px;
  border-bottom: 2px solid var(--ink);
}
.pane-head h2 { margin: 0 auto 0 0; font: 700 16px Unbounded, sans-serif; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-left: auto; }

button, .file {
  font: 600 14px 'Golos Text', sans-serif;
  padding: 7px 14px;
  border-radius: 999px;
  border: 2px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
}
button:hover, .file:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.ghost { background: transparent; color: var(--ink); }
.file { position: relative; display: inline-block; }
.file input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
.file:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }

.tabs { display: flex; gap: 4px; padding: 3px; border: 2px solid var(--ink); border-radius: 999px; }
.tabs button { border: 0; background: transparent; color: var(--ink); padding: 5px 12px; }
.tabs button[aria-selected='true'] { background: var(--accent); color: #fff; }

.editor { position: relative; display: flex; flex: 1; min-height: 460px; background: var(--card); }
.gutter {
  margin: 0;
  padding: 14px 10px 14px 14px;
  min-width: 46px;
  text-align: right;
  color: #b1a998;
  font: 13px/1.6 var(--mono);
  user-select: none;
  overflow: hidden;
  border-right: 1px dashed var(--line);
}
.gutter .bad { color: #fff; background: var(--err); border-radius: 4px; padding: 0 4px; }
textarea {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 14px;
  border: 0;
  resize: none;
  background: transparent;
  color: var(--ink);
  font: 13px/1.6 var(--mono);
  tab-size: 2;
  white-space: pre;
  overflow: auto;
}
textarea:focus-visible { outline: none; box-shadow: inset 0 0 0 3px var(--accent); }

.status { margin: 0; padding: 10px 14px; border-top: 2px solid var(--ink); font-size: 14px; min-height: 44px; }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); font-weight: 600; }

.opts {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  color: var(--muted);
}
.opts label { display: flex; align-items: center; gap: 8px; }
.opts label[hidden] { display: none; }
.opts input, .opts select {
  font: 13px var(--mono);
  padding: 5px 8px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  width: 130px;
}
.opts select { width: auto; }
.opts input:invalid { border-color: var(--err); }

.output {
  flex: 1;
  margin: 0;
  padding: 16px 18px;
  min-height: 400px;
  max-height: 560px;
  overflow: auto;
  background: var(--code-bg);
  color: var(--code-ink);
  font: 13px/1.6 var(--mono);
  tab-size: 4;
}
.output .k { color: var(--k); }
.output .t { color: var(--t); }
.output .s { color: var(--s); }
.output .c { color: var(--c); }
.stats { margin: 0; padding: 10px 14px; border-top: 2px solid var(--ink); font-size: 14px; color: var(--muted); min-height: 44px; }

.how { max-width: 1320px; margin: 40px auto 0; padding: 0 20px; }
.how h2 { font: 700 22px Unbounded, sans-serif; margin: 0 0 14px; }
.how ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.how li { background: var(--card); border: 2px solid var(--ink); border-radius: 14px; padding: 14px 16px; font-size: 15px; }
.how b { display: block; margin-bottom: 4px; }
.how code { font: 13px var(--mono); background: #f0e9dc; padding: 1px 5px; border-radius: 5px; }

.foot { max-width: 1320px; margin: 0 auto; padding: 36px 20px 40px; color: var(--muted); font-size: 14px; }
.foot a { color: var(--ink); }

@media (max-width: 900px) {
  .work { grid-template-columns: minmax(0, 1fr); }
  .editor { min-height: 300px; }
  .output { min-height: 280px; }
}
@media (max-width: 520px) {
  .top { padding-top: 20px; }
  .logo { width: 46px; height: 46px; font-size: 18px; }
  .work, .top, .how, .foot { padding-left: 16px; padding-right: 16px; }
  .pane { box-shadow: 4px 4px 0 var(--ink); }
  .pane-head .actions { margin-left: 0; }
}