:root {
  --bg: #0b0d10; --panel: #12161b; --line: #222a33; --text: #d7dde4; --dim: #7d8794;
  --green: #3ddc84; --amber: #f5b942; --red: #f0616d;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  color-scheme: dark; font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; background: var(--bg); color: var(--text); line-height: 1.5;
  background-image: linear-gradient(#ffffff06 1px, transparent 1px), linear-gradient(90deg, #ffffff06 1px, transparent 1px);
  background-size: 32px 32px;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 1.5rem 0 .25rem; }
h2 { font: 600 1rem var(--mono); margin: 0; }
code, .mono { font-family: var(--mono); font-size: .9em; }
code { background: var(--line); padding: .1rem .35rem; border-radius: 4px; }
.muted { color: var(--dim); }
.small { font-size: .85rem; }
.version { color: var(--dim); font-size: .75rem; font-weight: 400; }
.error { color: var(--red); background: #f0616d14; border: 1px solid #f0616d40; padding: .6rem .8rem; border-radius: 8px; }

.logo { font: 600 1rem var(--mono); color: var(--text); display: inline-flex; align-items: center; gap: .5rem; }
.logo:hover { text-decoration: none; }
.dot { width: .55rem; height: .55rem; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }

.top { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: .8rem 1.5rem; border-bottom: 1px solid var(--line); background: #0b0d10cc; backdrop-filter: blur(6px); }
.top nav { display: flex; align-items: center; gap: 1.2rem; font-size: .9rem; }
.top nav form { display: inline; }
.who { color: var(--dim); font-family: var(--mono); font-size: .85rem; }

.wrap { max-width: 44rem; margin: 3rem auto; padding: 0 1.25rem; }
.wrap.wide { max-width: 64rem; }
.center { min-height: 100vh; display: grid; place-items: center; padding: 1.25rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1.5rem; margin-bottom: 1.25rem; }
.card.auth { width: 100%; max-width: 24rem; }
.head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: .75rem; }
.prompt { color: var(--green); }
.hint { color: var(--dim); font-size: .85rem; text-align: center; }
.foot { margin: 1.25rem 0 0; font-size: .9rem; color: var(--dim); text-align: center; }

label { display: block; margin: 0 0 1rem; font-size: .85rem; color: var(--dim); }
input { display: block; width: 100%; padding: .65rem .75rem; margin-top: .35rem; font: inherit; font-size: .95rem; color: var(--text);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; outline: none; }
input.code { font: 600 1.6rem var(--mono); letter-spacing: .5em; text-align: center; }
input:focus { border-color: var(--green); box-shadow: 0 0 0 3px #3ddc8426; }

button, .button { display: inline-block; padding: .6rem 1.1rem; font: 600 .9rem system-ui, sans-serif; cursor: pointer;
  border-radius: 8px; border: 1px solid var(--line); background: var(--line); color: var(--text); text-decoration: none; }
button:hover, .button:hover { filter: brightness(1.15); text-decoration: none; }
.primary { background: var(--green); border-color: var(--green); color: #06120b; }
.danger { background: transparent; border-color: #f0616d66; color: var(--red); }
.wide { width: 100%; }
button.link { background: none; border: 0; padding: 0; color: var(--dim); font: inherit; }
button.link:hover { color: var(--text); }
.actions { display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; margin-top: 1.25rem; }
.row { display: flex; gap: .75rem; }
.row input { margin: 0; }
.row button { white-space: nowrap; }

.pill { font: 600 .72rem var(--mono); text-transform: uppercase; letter-spacing: .05em; padding: .2rem .6rem; border-radius: 99px;
  display: inline-flex; align-items: center; gap: .4rem; white-space: nowrap; }
.pill::before { content: ""; width: .45rem; height: .45rem; border-radius: 50%; background: currentColor; }
.pill.ok { color: var(--green); background: #3ddc841a; }
.pill.busy { color: var(--amber); background: #f5b9421a; }
.pill.busy::before { animation: blink 1s infinite; }
.pill.bad { color: var(--red); background: #f0616d1a; }
.pill.off { color: var(--dim); background: #7d87941a; }
@keyframes blink { 50% { opacity: .2; } }

.steps { list-style: none; display: flex; padding: 0; margin: 1.25rem 0 0; font: .78rem var(--mono); color: var(--dim); }
.steps li { flex: 1; padding-top: .7rem; border-top: 2px solid var(--line); }
.steps li::before { content: "○ "; }
.steps li.done { color: var(--green); border-color: var(--green); }
.steps li.done::before { content: "✓ "; }
.steps li.now { color: var(--amber); border-color: var(--amber); }
.steps li.now::before { content: "● "; animation: blink 1s infinite; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.25rem; }
.stat b { display: block; font: 600 1.6rem var(--mono); }
.stat span { color: var(--dim); font-size: .85rem; }

table { width: 100%; border-collapse: collapse; margin-top: 1rem; font-size: .9rem; }
th { text-align: left; font: 600 .72rem var(--mono); text-transform: uppercase; letter-spacing: .05em; color: var(--dim); }
th, td { padding: .6rem .5rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
.copy { display: flex; gap: .5rem; }
.copy input { margin: 0; padding: .4rem .6rem; font: .8rem var(--mono); }
.copy button { padding: .4rem .8rem; font-size: .8rem; }

.bar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .5rem 1rem;
  background: var(--panel); border-bottom: 1px solid var(--line); font-size: .85rem; }
.bar .muted { font-family: var(--mono); font-size: .78rem; }
body:has(#panes) { background: var(--bg); height: 100vh; display: flex; flex-direction: column; }
.workspace { flex: 1; min-height: 0; display: flex; }
.tabbar { width: 220px; flex: none; display: flex; flex-direction: column; background: var(--panel);
  border-right: 1px solid var(--line); font: .85rem var(--mono); }
.tabhead { position: relative; display: flex; justify-content: space-between; align-items: center; padding: .5rem .75rem; }
#add { font-size: 1.2rem; line-height: 1; }
#add[hidden] { display: none; }
#add:disabled { opacity: .4; cursor: default; }
.menu { position: absolute; right: .5rem; top: 2.2rem; z-index: 5; display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.menu[hidden] { display: none; }
.menu button { background: none; border: 0; border-radius: 0; color: var(--text); font: inherit; padding: .45rem 1rem; text-align: left; }
.menu button:hover { background: var(--line); }
#tabs { list-style: none; margin: 0; padding: 0 .4rem; overflow-y: auto; }
#tabs li { display: flex; align-items: center; gap: .4rem; padding: .5rem .6rem; border-radius: 6px; color: var(--dim); cursor: pointer; }
#tabs li:hover { color: var(--text); }
#tabs li.active { background: var(--line); color: var(--text); }
#tabs .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#tabs kbd { font: inherit; font-size: .72rem; color: var(--dim); }
#tabs .close { visibility: hidden; background: none; border: 0; padding: 0 .2rem; color: var(--dim); font: inherit; }
#tabs li:hover .close { visibility: visible; }
#tabs .rename { margin: 0; padding: .1rem .3rem; font: inherit; }
#tab-pick { display: none; }
#panes { flex: 1; min-width: 0; position: relative; }
.pane { position: absolute; inset: 0; padding: 6px 8px; }
.pane[hidden] { display: none; }
.ended { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: #0b0d10e6; font-family: var(--mono); color: var(--dim); }
.files { flex: 1; min-height: 0; display: flex; flex-direction: column; border-top: 1px solid var(--line); margin-top: .5rem; }
#upload { font-size: 1rem; line-height: 1; }
#file-input { display: none; }
.tree, .tree ul { list-style: none; margin: 0; padding: 0 0 0 .8rem; }
#tree { padding: 0 .4rem; overflow-y: auto; }
.tree ul[hidden] { display: none; }
.tree .row { display: flex; align-items: center; gap: .3rem; border-radius: 6px; }
.tree .row:hover { background: var(--line); }
.tree button { flex: 1; min-width: 0; background: none; border: 0; padding: .3rem .4rem; color: var(--dim); font: inherit;
  text-align: left; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; }
.tree button:hover, .tree .row.active button { color: var(--text); }
.tree .dir::before { content: '▸ '; }
.tree .dir[aria-expanded="true"]::before { content: '▾ '; }
.tree .dl { opacity: .35; padding: 0 .4rem; color: var(--dim); font-size: .8rem; }
.tree .row:hover .dl, .tree .dl:focus { opacity: 1; }
.tree .note { display: block; padding: .2rem .4rem; color: var(--dim); font-size: .8rem; }
#files-status { margin: .4rem .75rem; min-height: 1.2em; overflow-wrap: anywhere; }
#panes.drop { outline: 2px dashed var(--green); outline-offset: -6px; }
.reader { width: 45%; max-width: 760px; flex: none; display: flex; flex-direction: column; min-width: 0;
  background: var(--panel); border-left: 1px solid var(--line); }
.reader[hidden] { display: none; }
.reader-head { display: flex; align-items: center; gap: .6rem; padding: .5rem .75rem; border-bottom: 1px solid var(--line); font-size: .8rem; }
#reader-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--dim); }
#reader-close { font-size: 1.1rem; line-height: 1; }
.reader-body { flex: 1; min-height: 0; overflow: auto; padding: 1rem 1.25rem; font-size: .92rem; }
.reader-body pre { margin: 0; font: .82rem/1.5 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; }
.reader-body.md pre { background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: .6rem .8rem; }
.reader-body.md pre code { background: none; padding: 0; }
.reader-body.md table { border-collapse: collapse; }
.reader-body.md th, .reader-body.md td { border: 1px solid var(--line); padding: .25rem .5rem; }
.reader-body.md img, .reader-body > img { max-width: 100%; }
.reader-body.md blockquote { margin: 0; padding-left: .8rem; border-left: 3px solid var(--line); color: var(--dim); }
.reader-body.frame { padding: 0; overflow: hidden; }
.reader-body iframe { width: 100%; height: 100%; border: 0; }
@media (max-width: 700px) {
  .files, .reader { display: none; }
  .workspace { flex-direction: column; }
  .tabbar { width: auto; flex-direction: row; align-items: center; border-right: 0; border-bottom: 1px solid var(--line); }
  .tabhead { order: 2; }
  .tabhead .muted, #tabs { display: none; }
  #tab-pick { display: block; flex: 1; margin: .3rem .5rem; padding: .3rem; font: inherit; color: var(--text);
    background: var(--bg); border: 1px solid var(--line); border-radius: 6px; }
}

@media (max-width: 600px) {
  .who, .bar .muted { display: none; }
  .row { flex-direction: column; }
}

.notice { border: 1px solid var(--amber); border-radius: 8px; padding: 10px 14px; margin: 12px 0; }
.key { display: inline-block; font-size: 1.15em; letter-spacing: .05em; padding: 8px 12px; user-select: all; }
label.check { display: inline-flex; gap: 8px; align-items: center; }
label.check input { width: auto; }
details summary { cursor: pointer; }
details form { margin-top: 8px; }
#forget[hidden] { display: none; }
.notice .row { align-items: flex-end; }
#forget { margin-left: .75rem; }