:root {
  --bg: #070b10;
  --panel: #0a0e14;
  --line: #1d2633;
  --fg: #dbe5f0;
  --dim: #8496ad;
  --violet: #a78bfa;
  --blue: #60a5fa;
  --pink: #f472b6;
  --teal: #2dd4bf;
  --orange: #fb923c;
  --green: #4ade80;
  --green-dim: #2c8a58;
  --red: #f87171;
  --amber: #fbbf24;
  --cyan: #67e8f9;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 15px;
  line-height: 1.55;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.term {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--panel);
}

.term-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  background: #060a0f;
  font-size: 11px;
  letter-spacing: .08em;
}

.brand { color: var(--green); font-weight: 700; }
.back { color: var(--green); text-decoration: none; border: 1px solid #2b5234; border-radius: 4px; padding: 0 8px; }
.back:hover { background: #12200f; }
.status { display: flex; flex-wrap: wrap; gap: 4px 12px; color: var(--dim); }
.status b { color: var(--fg); font-weight: 600; }

.screen {
  outline: none;
  padding: 14px 16px 24px;
  flex: 1 1 auto;
  max-width: 980px;
  width: 100%;
  overflow-wrap: anywhere;
}

.dim { color: var(--dim); }
.green { color: var(--green); }
.amber { color: var(--amber); }
.red { color: var(--red); }
.cyan { color: var(--cyan); }
.bold { font-weight: 700; }

.block { margin: 0 0 14px; }
.rule { border: 0; border-top: 1px dashed var(--line); margin: 14px 0; }

.cmdline { color: var(--fg); }
.cmdline .prompt { color: var(--green); }
.cmdline .path { color: var(--cyan); }

/* ls -l style menu rows */
.ls-list { list-style: none; margin: 4px 0 0; padding: 0; font-size: 14px; }
.ls-list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 5px 6px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.ls-list li:hover,
.ls-list li:focus {
  border-color: var(--line);
  background: #0b101a;
  outline: none;
}
.ls-list .key { color: var(--amber); min-width: 26px; }
.ls-list .perms { color: var(--cyan); min-width: 90px; }
.ls-list .owner { color: var(--dim); min-width: 74px; }
.ls-list .size { color: var(--dim); min-width: 66px; text-align: right; }
.ls-list .date { color: var(--dim); min-width: 118px; }
.ls-list .fname { color: var(--green); font-weight: 700; }
.ls-list li:hover .fname,
.ls-list li:focus .fname { text-decoration: underline; }
.ls-list .desc { color: var(--dim); font-size: 13px; overflow: hidden; text-overflow: ellipsis; }

.mission-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: baseline;
  color: var(--dim);
  font-size: 12px;
  letter-spacing: .06em;
  margin-bottom: 8px;
}
.mission-head .badge { color: var(--amber); }
.mission-head .badge.green { color: var(--green); }

.question-text { margin: 0 0 12px; color: var(--fg); }

.target {
  font-size: 16px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: #060a10;
  border-radius: 4px;
  margin: 0 0 10px;
  white-space: pre-wrap;
}
.target .rest { color: var(--dim); }
.target .ok { color: var(--green); }
.target .bad { color: var(--red); background: rgba(248, 113, 113, .12); }
.target .cursor { box-shadow: inset -2px 0 0 var(--amber); }

.target-inline { color: var(--fg); white-space: pre-wrap; }
.target-inline .rest { color: var(--dim); }
.target-inline .ok { color: var(--green); }
.target-inline .bad { color: var(--red); background: rgba(248, 113, 113, .12); }
.target-inline .cursor { box-shadow: inset -2px 0 0 var(--amber); }

/* prompt-style input line */
.pline {
  display: flex;
  gap: 8px;
  align-items: baseline;
  flex-wrap: wrap;
  margin: 12px 0 4px;
}
.pline .prefix { color: var(--green); white-space: nowrap; }
.pline .ppath { color: var(--cyan); }
.pline input {
  flex: 1 1 60%;
  min-width: 180px;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  outline: none;
  color: var(--fg);
  font: inherit;
  font-size: 16px;
  padding: 2px 0 4px;
  caret-color: var(--amber);
}
.pline input:focus { border-bottom-color: var(--green-dim); }
.pline input.bad { color: var(--red); border-bottom-color: var(--red); }
.pline .pbtn {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green-dim);
  border-radius: 3px;
  font: inherit;
  font-size: 12px;
  padding: 4px 12px;
  cursor: pointer;
}
.pline .pbtn:hover { background: #0d1a12; }
.pline input:disabled { opacity: .55; }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  color: var(--dim);
  font-size: 12px;
  margin-top: 10px;
  letter-spacing: .04em;
}
.meta b { color: var(--fg); font-weight: 600; }

.hint { color: var(--dim); font-size: 12px; margin-top: 12px; }

.feedback { margin: 12px 0 0; }
.feedback.ok { color: var(--green); }
.feedback.bad { color: var(--red); }

.explain {
  margin-top: 14px;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}
.explain h3 { margin: 0 0 8px; font-size: 14px; color: var(--green); letter-spacing: .06em; }
.explain .row { display: flex; gap: 10px; margin: 2px 0; font-size: 13px; }
.explain .row .flag { color: var(--amber); min-width: 74px; }
.explain .row .desc { color: var(--fg); }
.explain .lbl { color: var(--dim); font-size: 12px; letter-spacing: .06em; margin: 10px 0 2px; }
.explain pre {
  margin: 0;
  padding: 8px 10px;
  background: #060a10;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--cyan);
  overflow-x: auto;
  font: inherit;
  font-size: 13px;
}

.result h2 { margin: 0 0 6px; font-size: 15px; letter-spacing: .1em; color: var(--green); }
.result table { border-collapse: collapse; width: 100%; margin: 8px 0 14px; font-size: 13px; }
.result th, .result td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--line); }
.result th { color: var(--dim); font-weight: 500; width: 58%; }
.result td { color: var(--fg); font-weight: 600; text-align: right; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.actions button {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green-dim);
  border-radius: 3px;
  font: inherit;
  font-size: 13px;
  padding: 7px 12px;
  cursor: pointer;
}
.actions button:hover { background: #0d1a12; }

@media (max-width: 560px) {
  body { font-size: 14px; }
  .screen { padding: 12px 10px 18px; }
  .ls-list li { flex-wrap: wrap; gap: 6px 10px; }
  .ls-list .perms, .ls-list .owner { min-width: 0; }
  .ls-list .size, .ls-list .date { display: none; }
  .meta { gap: 3px 12px; }
  .explain .row { gap: 6px; }
  .explain .row .flag { min-width: 62px; }
  .status { font-size: 10px; }
}

.issued {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.issued .cmdline.block { margin-bottom: 2px; color: var(--dim); }
.issued .ls-list li { cursor: pointer; }

/* ── 시인성 강화: 색상 액센트 ───────────────────────── */
.term-bar { border-bottom: 1px solid #24344a; }
.brand { color: #6ee7a0; text-shadow: 0 0 12px rgba(74, 222, 128, .25); }
.back { color: var(--teal); border-color: #1e4d52; }
.back:hover { background: #0c2224; }
.status span:nth-child(1) b { color: var(--green); }
.status span:nth-child(2) b { color: var(--amber); }
.status span:nth-child(3) b { color: var(--cyan); }
.status span:nth-child(4) b { color: var(--violet); }

.block.green { color: #6ee7a0; }
.block.cyan { color: #7dd3fc; }

.ls-list .key { color: var(--orange); }
.ls-list .perms { color: #38bdf8; }
.ls-list .owner { color: #94a3b8; }
.ls-list .size { color: var(--amber); }
.ls-list .date { color: #7c8ea6; }
.ls-list .fname { color: #5eead4; }
.ls-list .desc { color: #93a7c0; }
.ls-list li:hover { background: #0d1626; border-color: #2b4059; }

.mission-head .badge { color: var(--amber); }
.mission-head .badge.lvl-beginner { color: #5eead4; }
.mission-head .badge.lvl-intermediate { color: var(--amber); }
.mission-head .badge.lvl-advanced { color: var(--pink); }
.mission-head .badge.green { color: var(--orange); }

.question-text {
  color: #eaf2fb;
  border-left: 2px solid var(--violet);
  padding-left: 10px;
  line-height: 1.6;
}

.cmdline .prompt { color: #6ee7a0; }
.cmdline .path, .pline .ppath { color: #67e8f9; }
.target-inline .rest { color: #8ba0b8; }
.target-inline .ok { color: #4ade80; background: rgba(74, 222, 128, .10); border-radius: 2px; }
.target-inline .bad { color: #fecaca; background: rgba(248, 113, 113, .28); border-radius: 2px; }
.target-inline .cursor { box-shadow: inset -2px 0 0 #fbbf24; }
.pline input:focus { border-bottom-color: #2dd4bf; box-shadow: 0 1px 0 #2dd4bf; }
.pline .pbtn { color: #5eead4; border-color: #1e6f66; }
.pline .pbtn:hover { background: #0d2422; border-color: #2dd4bf; }

.meta { color: #8fa3ba; }
.meta b { color: #eaf2fb; }
.hint { color: #7f93aa; }
.hint b, .hint .cyan { color: var(--cyan); }

.feedback.ok {
  color: #86efac;
  background: rgba(74, 222, 128, .10);
  border-left: 2px solid #4ade80;
  padding: 4px 10px;
}
.feedback.bad {
  color: #fca5a5;
  background: rgba(248, 113, 113, .10);
  border-left: 2px solid #f87171;
  padding: 4px 10px;
}

.explain { border-top-color: #2b3f57; }
.explain h3 { color: #5eead4; }
.explain h3::before { content: "» "; color: var(--violet); }
.explain .lbl { color: #a78bfa; }
.explain .row .flag { color: #fbbf24; }
.explain .row .desc { color: #dbe5f0; }
.explain pre {
  color: #a5f3fc;
  background: #071019;
  border-color: #1e3a52;
  border-left: 2px solid #38bdf8;
}
.explain .dim { color: #93a7c0; }

.result h2 { color: #5eead4; }
.result table tr:nth-child(odd) { background: rgba(56, 189, 248, .04); }
.result td { color: #eaf2fb; }
.result td:first-child { color: #93a7c0; font-weight: 500; text-align: left; }
.result tr:nth-child(1) td, .result tr:nth-child(8) td { color: #fbbf24; }
.result tr:nth-child(5) td { color: #4ade80; }
.result tr:nth-child(6) td { color: #67e8f9; }

.actions button { color: #5eead4; border-color: #1e6f66; }
.actions button:hover { background: #0d2422; border-color: #2dd4bf; }

.issued { border-top-color: #2b3f57; }
.issued .lbl { color: var(--pink); }
.issued .cmdline.block { color: #8fa3ba; }
.issued .ls-list li { background: rgba(167, 139, 250, .04); }
.issued .ls-list .fname { color: #c4b5fd; }
.issued .ls-list .desc { color: #93a7c0; }
.issued .ls-list li:hover { background: rgba(167, 139, 250, .12); border-color: #6d5bd0; }

.badge.danger { color: #fecaca; background: rgba(127, 29, 29, .55); border: 1px solid #b91c1c; }
.danger-warn { margin: 10px 0; padding: 10px 12px; color: #fecaca; background: rgba(127, 29, 29, .28); border-left: 3px solid #ef4444; border-radius: 4px; font-size: 13px; line-height: 1.5; }

/* options reference (below question) */
.opt-ref{margin-top:14px;padding-top:10px;border-top:1px dashed var(--line)}
.opt-ref .lbl{color:var(--teal)}
.opt-ref .lbl.sub{margin-top:8px}
.opt-ref .row{display:flex;gap:10px;padding:1px 0;font-size:13px}
.opt-ref .flag{color:var(--orange);min-width:96px}
.opt-ref .desc{color:var(--dim)}
.opt-ref pre{margin:4px 0 0;padding:6px 8px;border-left:2px solid var(--blue);color:var(--blue);white-space:pre-wrap}
.opt-ref .opt-note{margin-top:6px;font-size:12px}