:root {
  --bg: #0a0e0a;
  --panel: #0e140e;
  --green: #3dff7a;
  --green-dim: #1f9a4a;
  --text: #c8f7d4;
  --dim: #6f8a76;
  --amber: #ffcc44;
  --red: #ff5f56;
  --blue: #56b6ff;
  --font: "SF Mono", "Fira Code", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: #05070a radial-gradient(circle at 50% 0%, #0b160f 0%, #05070a 70%);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
}

body {
  display: flex;
  padding: 24px;
}

/* subtle CRT scanlines */
/* margin:auto (not align-items:center) centers the panel while keeping the top
   reachable by scrolling when a screen is taller than the viewport. */
.crt { position: relative; width: 100%; max-width: 760px; margin: auto; }
.crt::after {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(rgba(0,0,0,0) 0 2px, rgba(0,0,0,0.18) 2px 3px);
  pointer-events: none; border-radius: 10px; mix-blend-mode: multiply;
}

.terminal {
  background: var(--panel);
  border: 1px solid #1c2a1f;
  border-radius: 10px;
  box-shadow: 0 0 0 1px #000, 0 24px 60px rgba(0,0,0,0.6), 0 0 60px rgba(61,255,122,0.06);
  overflow: hidden;
}

.titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: linear-gradient(#16201808, #0c120c);
  border-bottom: 1px solid #1c2a1f;
}
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.dot.red { background: var(--red); }
.dot.amber { background: var(--amber); }
.dot.green { background: var(--green); }
.titlebar .title { margin-left: 8px; color: var(--dim); font-size: 13px; }
.build {
  font-size: 11px; color: var(--dim); opacity: 0.7;
  border: 1px solid #1c2a1f; border-radius: 999px; padding: 1px 7px;
  letter-spacing: 0.3px; white-space: nowrap;
}
.build:hover { opacity: 1; color: var(--green); border-color: var(--green-dim); }
.mute {
  margin-left: auto; background: none; border: none; cursor: pointer;
  font-size: 15px; color: var(--dim);
}

.screen { padding: 26px 28px 30px; min-height: 460px; }
.view.hidden { display: none; }

/* ---------- start ---------- */
.logo {
  color: var(--green);
  text-shadow: 0 0 14px rgba(61,255,122,0.45);
  font-size: 13px; line-height: 1.05; margin: 0 0 6px;
  white-space: pre; overflow-x: auto;
}
.tagline { color: var(--dim); margin: 0 0 22px; }
.field { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.field label { color: var(--green-dim); white-space: nowrap; }
#name {
  flex: 1; background: #060a06; border: 1px solid #1c2a1f; color: var(--text);
  font-family: var(--font); font-size: 16px; padding: 10px 12px; border-radius: 6px;
  outline: none;
}
#name:focus { border-color: var(--green-dim); box-shadow: 0 0 0 2px rgba(61,255,122,0.15); }
.rules { color: var(--dim); font-size: 12.5px; line-height: 1.6; margin-top: 22px; }

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font); font-size: 15px; cursor: pointer;
  padding: 11px 20px; border-radius: 6px; border: 1px solid transparent;
  transition: transform .05s ease, box-shadow .15s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--green-dim); color: #04140a; font-weight: 700;
  border-color: var(--green);
  box-shadow: 0 0 18px rgba(61,255,122,0.25);
}
.btn.primary:hover { background: var(--green); }
.btn.ghost { background: transparent; color: var(--dim); border-color: #243024; }
.btn.ghost:hover { color: var(--text); border-color: var(--green-dim); }

/* ---------- HUD ---------- */
.hud {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px;
}
.hud-item {
  background: #060a06; border: 1px solid #1c2a1f; border-radius: 5px;
  padding: 6px 10px; font-size: 13px; color: var(--text);
}
#hud-streak { color: var(--amber); }
.bar { height: 6px; background: #0a120a; border-radius: 4px; overflow: hidden; margin-bottom: 22px; }
.bar-fill {
  height: 100%; width: 0%; background: linear-gradient(90deg, var(--green-dim), var(--green));
  transition: width .35s ease; box-shadow: 0 0 12px rgba(61,255,122,0.5);
}

.level-name { color: var(--blue); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; margin: 0 0 8px; }
.prompt { font-size: 18px; line-height: 1.5; margin: 0 0 22px; color: var(--text); }

/* ---------- command line + blank ---------- */
.cmdline {
  background: #060a06; border: 1px solid #1c2a1f; border-radius: 8px;
  padding: 18px 18px; font-size: 19px; line-height: 1.6;
  display: flex; align-items: center; flex-wrap: wrap; gap: 2px;
  min-height: 60px;
}
.cmdline .ps1 { color: var(--green-dim); margin-right: 10px; }
.cmdline .ct { color: var(--text); white-space: pre; }
.blank {
  background: transparent; border: none; border-bottom: 2px solid var(--green);
  color: var(--amber); font-family: var(--font); font-size: 19px;
  padding: 1px 4px; min-width: 90px; outline: none; caret-color: var(--green);
}
.blank::placeholder { color: #3a4a3a; }
.cmdline.correct { animation: flashok .5s ease; border-color: var(--green); }
.cmdline.wrong { animation: shake .35s ease; border-color: var(--red); }
@keyframes flashok {
  0% { background: #0a3a18; } 100% { background: #060a06; }
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20% { transform: translateX(-8px); } 40% { transform: translateX(7px); }
  60% { transform: translateX(-5px); } 80% { transform: translateX(3px); }
}

.feedback { min-height: 46px; margin: 14px 2px 18px; font-size: 14px; line-height: 1.5; }
.feedback .ok { color: var(--green); }
.feedback .no { color: var(--red); }
.feedback .hint { color: var(--amber); }
.feedback .explain { color: var(--dim); display: block; margin-top: 6px; }
.feedback .pts { color: var(--green); font-weight: 700; }

.actions { display: flex; gap: 12px; }
.hint-help { color: #4f624f; font-size: 12px; margin-top: 16px; }

/* ---------- level-up overlay ---------- */
.levelup {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(2,6,3,0.82); z-index: 20; flex-direction: column; gap: 8px;
}
.levelup.hidden { display: none; }
.levelup .lu-big {
  color: var(--green); font-size: 40px; font-weight: 800; letter-spacing: 3px;
  text-shadow: 0 0 24px rgba(61,255,122,0.6); animation: pop .4s ease;
}
.levelup .lu-sub { color: var(--blue); font-size: 16px; letter-spacing: 2px; }
@keyframes pop { 0% { transform: scale(.6); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }

/* ---------- results ---------- */
#result-title { color: var(--green); text-shadow: 0 0 14px rgba(61,255,122,0.4); margin: 0 0 18px; }
.result-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 16px; }
.stat { background: #060a06; border: 1px solid #1c2a1f; border-radius: 6px; padding: 12px 14px; }
.stat .k { color: var(--dim); font-size: 12px; display: block; }
.stat .v { color: var(--text); font-size: 22px; font-weight: 700; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; min-height: 10px; }
.badge {
  background: #10240f; border: 1px solid var(--green-dim); color: var(--green);
  padding: 6px 12px; border-radius: 999px; font-size: 13px;
  box-shadow: 0 0 14px rgba(61,255,122,0.2); animation: pop .35s ease;
}

/* ---------- leaderboard ---------- */
.lb { margin-top: 8px; }
.lb h3 { color: var(--dim); font-size: 14px; font-weight: 600; margin: 22px 0 10px;
  border-bottom: 1px solid #1c2a1f; padding-bottom: 8px; }
.status { font-size: 11.5px; font-weight: 400; }
.status.cloud { color: var(--green); }
.status.local { color: var(--amber); }
.scores { list-style: none; margin: 0; padding: 0; max-height: 230px; overflow-y: auto; }
.scores li {
  display: grid; grid-template-columns: 28px 1fr auto auto; gap: 10px; align-items: baseline;
  padding: 7px 6px; border-bottom: 1px dashed #18221a; font-size: 14px;
}
.scores li .rank { color: var(--dim); }
.scores li .who { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.scores li .pts { color: var(--green); font-weight: 700; }
.scores li .meta { color: var(--dim); font-size: 12px; }
.scores li.me { background: #0c1d10; border-radius: 5px; }
.scores li.empty, .scores li.error { display: block; color: var(--dim); border: none; font-style: italic; }

/* ---------- level-select menu ---------- */
.pick { color: var(--dim); font-size: 12px; letter-spacing: 2px; text-transform: uppercase;
  margin: 20px 0 10px; }
.levels { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tile {
  text-align: left; background: #060a06; border: 1px solid #1c2a1f; border-radius: 8px;
  padding: 12px 14px; cursor: pointer; font-family: var(--font); color: var(--text);
  transition: border-color .15s, box-shadow .15s, transform .05s;
}
.tile:hover { border-color: var(--green-dim); box-shadow: 0 0 16px rgba(61,255,122,.15); }
.tile:active { transform: translateY(1px); }
.tile .lv { color: var(--green); font-weight: 700; font-size: 14px; display: block; }
.tile .nm { color: var(--dim); font-size: 12px; display: block; margin-top: 2px; }
.tile .best { color: var(--amber); font-size: 12px; display: block; margin-top: 9px; }
.tile.full { grid-column: 1 / -1; border-color: #2a3f2c; background: #081109; }
.tile.full .lv { color: var(--blue); }

/* ---------- leaderboard tabs ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tab {
  background: transparent; border: 1px solid #243024; color: var(--dim); border-radius: 999px;
  padding: 4px 13px; font-size: 12px; cursor: pointer; font-family: var(--font);
  transition: color .15s, border-color .15s, background .15s;
}
.tab:hover { color: var(--text); }
.tab.active { background: #10240f; border-color: var(--green-dim); color: var(--green); }

/* ---------- HUD menu button ---------- */
.hud-btn { cursor: pointer; font-family: var(--font); margin-left: auto; }
.hud-btn:hover { border-color: var(--green-dim); color: var(--green); }

/* ---------- confirm modal ---------- */
.modal {
  position: fixed; inset: 0; z-index: 30; display: flex; align-items: center; justify-content: center;
  background: rgba(2,6,3,0.82);
}
.modal.hidden { display: none; }
.modal-box {
  background: var(--panel); border: 1px solid #2a3f2c; border-radius: 10px; padding: 24px;
  max-width: 380px; text-align: center; box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
.modal-box p { color: var(--text); margin: 0 0 20px; line-height: 1.5; }
.modal-actions { display: flex; gap: 12px; justify-content: center; }

/* ---------- results extras ---------- */
.result-actions { display: flex; gap: 12px; }
.new-high {
  color: var(--amber); font-weight: 700; letter-spacing: 1px; margin: 0 0 16px;
  text-shadow: 0 0 16px rgba(255,204,68,0.4); animation: pop .4s ease;
}
.new-high.hidden { display: none; }
kbd {
  background: #0a120a; border: 1px solid #243024; border-radius: 4px; padding: 1px 6px;
  font-family: var(--font); font-size: 11px; color: var(--text);
}

/* ---------- target line + combined best + reset ---------- */
#hud-target { color: var(--dim); }
#hud-target.beat {
  color: var(--green); border-color: var(--green-dim);
  box-shadow: 0 0 12px rgba(61,255,122,0.3);
}
.combined-best { color: var(--amber); font-size: 13px; margin: 12px 2px 0; }
.combined-best .lbl { color: var(--dim); }
.btn.small { padding: 7px 13px; font-size: 12.5px; }
#reset-scores { margin-top: 16px; }
.btn.practice { display: block; width: 100%; text-align: left; margin: 12px 0 0; }

/* ---------- terminal ---------- */
.term-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
#term-title { color: var(--blue); letter-spacing: 1px; font-size: 14px; }
.term-goal { color: var(--amber); font-size: 14px; flex: 1; }
.term-goal.hidden { display: none; }
.term-bar .btn { margin-left: auto; }
.terminal-screen {
  background: #050805; border: 1px solid #1c2a1f; border-radius: 8px;
  padding: 14px 16px; height: 440px; overflow-y: auto; cursor: text;
  font-size: 13.5px; line-height: 1.55;
}
.term-out > div { white-space: pre-wrap; word-break: break-word; }
.term-out .term-echo { color: var(--text); }
.term-out .term-note { color: var(--dim); font-style: italic; }
.term-out .term-err-out { color: #ff8a80; }
.term-line { display: flex; align-items: baseline; }
.term-prompt { color: var(--green); white-space: pre; }
.term-input {
  flex: 1; background: transparent; border: none; outline: none; padding: 0;
  color: var(--text); font-family: var(--font); font-size: 13.5px; caret-color: var(--green);
}
.term-help { color: #4f624f; font-size: 12px; margin-top: 10px; }
#term-goal { color: var(--amber); font-size: 14px; margin: 4px 0 10px; }
#term-hud { margin-bottom: 10px; }
.mission-steps { list-style: none; margin: 0 0 10px; padding: 0; display: flex; flex-direction: column; gap: 3px; }
.mission-steps.hidden { display: none; }
.mission-steps li { font-size: 12.5px; color: var(--dim); display: flex; gap: 7px; align-items: baseline; }
.mission-steps .ms-mark { width: 1em; flex: none; text-align: center; }
.mission-steps li.ms-done { color: var(--green-dim); text-decoration: line-through; }
.mission-steps li.ms-current { color: var(--green); font-weight: 600; }

/* ---------- review / spaced repetition ---------- */
.review-card {
  display: flex; align-items: center; gap: 8px; width: 100%;
  background: #10240f; border: 1px solid var(--green-dim); color: var(--text);
  border-radius: 8px; padding: 12px 16px; margin-bottom: 16px; cursor: pointer;
  font-family: var(--font); font-size: 14px; text-align: left;
  box-shadow: 0 0 16px rgba(61,255,122,0.12);
}
.review-card:hover { border-color: var(--green); }
.review-card .rc-go { margin-left: auto; color: var(--green); }
.review-summary { display: flex; gap: 10px; flex-wrap: wrap; margin: 6px 0 18px; }
.rv-tile { background: #060a06; border: 1px solid #1c2a1f; border-radius: 8px; padding: 12px 16px; min-width: 96px; }
.rv-tile .rv-n { display: block; font-size: 26px; font-weight: 800; color: var(--green); }
.rv-tile .rv-k { color: var(--dim); font-size: 12px; }
.rv-h { color: var(--dim); font-size: 13px; font-weight: 600; margin: 8px 0 10px; }
.rv-bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 12.5px; }
.rv-bar-label { flex: 0 0 44%; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rv-bar { flex: 1; height: 8px; background: #0a120a; border-radius: 4px; overflow: hidden; }
.rv-bar-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--amber), var(--red)); }
.rv-bar-pct { flex: none; color: var(--dim); width: 3.5em; text-align: right; }

/* ---------- inline mini-man panel ---------- */
.manpanel {
  background: #060a06; border: 1px solid var(--green-dim); border-radius: 8px;
  margin: 0 0 10px; overflow: hidden; box-shadow: 0 0 14px rgba(61,255,122,0.08);
}
.manpanel.hidden { display: none; }
.mp-head { display: flex; align-items: center; gap: 8px; padding: 8px 12px; background: #0c160c; border-bottom: 1px solid #1c2a1f; }
.mp-title { color: var(--green); font-size: 13px; }
.mp-toggle { margin-left: auto; background: none; border: 1px solid #243024; color: var(--dim); border-radius: 5px; font-family: var(--font); font-size: 11px; padding: 2px 8px; cursor: pointer; }
.mp-toggle:hover { color: var(--text); border-color: var(--green-dim); }
.mp-close { background: none; border: none; color: var(--dim); font-size: 16px; cursor: pointer; line-height: 1; padding: 0 2px; }
.mp-close:hover { color: var(--red); }
.mp-body { padding: 10px 12px; }
.mp-body.hidden { display: none; }
.mp-sum { color: var(--text); font-size: 13px; margin: 0 0 6px; }
.mp-eg { margin: 0 0 8px; }
.mp-eg code, .mp-flags code { color: var(--amber); font-size: 12.5px; }
.mp-flags { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.mp-flags li { color: var(--dim); font-size: 12px; }

/* ---------- concept mastery (Play) ---------- */
.mastery { margin: 14px 0 4px; }
.mastery-row {
  display: flex; align-items: center; gap: 10px; width: 100%; margin-bottom: 7px;
  background: none; border: none; cursor: pointer; font-family: var(--font); text-align: left;
}
.mastery-row .mr-label { flex: 0 0 46%; color: var(--text); font-size: 12.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mastery-row .mr-bar { flex: 1; height: 8px; background: #0a120a; border: 1px solid #1c2a1f; border-radius: 4px; overflow: hidden; }
.mastery-row .mr-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--green-dim), var(--green)); }
.mastery-row .mr-pct { flex: none; width: 3.2em; text-align: right; color: var(--dim); font-size: 12px; }
.mastery-row:hover .mr-label { color: var(--green); }

/* ---------- fix-the-bug card (Play) ---------- */
.fixbug-tile {
  display: flex; flex-direction: column; gap: 3px; align-items: flex-start; width: 100%;
  background: #17120a; border: 1px solid var(--amber); color: var(--text);
  border-radius: 8px; padding: 12px 16px; margin: 8px 0 4px; cursor: pointer;
  font-family: var(--font); font-size: 14px; text-align: left;
}
.fixbug-tile:hover { box-shadow: 0 0 16px rgba(255,204,68,0.18); }
.fixbug-tile .fb-sub { color: var(--dim); font-size: 12px; }

/* ---------- level-up "new commands" chips ---------- */
.lu-chips { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; align-items: center; margin-top: 10px; color: var(--dim); font-size: 12px; }

/* ---------- results: missed questions ---------- */
.result-missed { margin: 4px 0 8px; }
.missed { background: #060a06; border: 1px solid #1c2a1f; border-left: 3px solid var(--amber); border-radius: 6px; padding: 10px 12px; margin-bottom: 8px; }
.missed-q { color: var(--text); font-size: 13px; margin-bottom: 4px; }
.missed-a code { color: var(--green); font-size: 13px; }
.missed-x { color: var(--dim); font-size: 12px; margin-top: 4px; }
.term-out .term-ok { color: var(--green); font-weight: 700; }
.term-out .term-hint { color: var(--amber); }
.term-out .term-goal-line { color: var(--blue); }

/* ========================================================================
   MERGED FEATURES — nav, vi mode, reference, accounts, XP, settings, themes
   ======================================================================== */
.hidden { display: none !important; }
.spacer { flex: 1; }

/* ---------- titlebar extras: account chip + icon buttons ---------- */
.account-chip {
  background: #0a120a; border: 1px solid #243024; color: var(--text);
  font-family: var(--font); font-size: 12px; padding: 4px 11px; border-radius: 999px; cursor: pointer;
  white-space: nowrap; transition: border-color .15s, color .15s;
}
.account-chip:hover { border-color: var(--green-dim); color: var(--green); }
.icon-btn { background: none; border: none; cursor: pointer; font-size: 15px; color: var(--dim); padding: 4px 6px; }
.icon-btn:hover { color: var(--green); }

/* ---------- nav bar ---------- */
.nav {
  display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 14px;
  background: #0c120c; border-bottom: 1px solid #1c2a1f;
}
.nav-tab {
  background: transparent; border: 1px solid transparent; color: var(--dim);
  padding: 6px 12px; border-radius: 6px; font-family: var(--font); font-size: 13px; cursor: pointer;
  transition: color .15s, background .15s, border-color .15s;
}
.nav-tab:hover { color: var(--text); }
.nav-tab.active { color: var(--green); background: #10240f; border-color: var(--green-dim); }

/* ---------- home ---------- */
.home-greeting { color: var(--dim); margin: 0 0 16px; }
.home-greeting a { color: var(--green); cursor: pointer; text-decoration: underline; }
.home-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 8px 0 20px; }
.hstat { background: #060a06; border: 1px solid #1c2a1f; border-radius: 8px; padding: 12px; text-align: center; }
.hstat .v { display: block; color: var(--green); font-size: 20px; font-weight: 700; }
.hstat .k { color: var(--dim); font-size: 11px; }
.home-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
@media (max-width: 560px) { .home-stats { grid-template-columns: repeat(2, 1fr); } }

/* ---------- chips + difficulty badges ---------- */
.chip {
  font-size: 11px; padding: 1px 7px; border-radius: 3px;
  background: #0a120a; border: 1px solid #1c2a1f; color: var(--blue);
}
.diff-badge { font-size: 10px; text-transform: uppercase; padding: 2px 7px; border-radius: 3px; letter-spacing: 1px; }
.diff-badge.beginner { color: #5dff9f; background: rgba(93, 255, 159, .12); }
.diff-badge.intermediate { color: var(--amber); background: rgba(255, 204, 68, .12); }
.diff-badge.advanced { color: #ff7ad6; background: rgba(255, 122, 214, .14); }
.tile-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.tile-chips { display: flex; flex-wrap: wrap; gap: 4px; margin: 8px 0; }
.chips-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 10px; align-items: center; }
.daily { margin-bottom: 12px; }

/* ---------- vi level cards ---------- */
.level-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; max-height: 56vh; overflow-y: auto; padding-right: 4px; }
.level-card {
  text-align: left; background: #060a06; border: 1px solid #1c2a1f; border-radius: 8px;
  padding: 14px; cursor: pointer; color: var(--text); font-family: var(--font);
  display: flex; flex-direction: column; gap: 8px; min-height: 120px;
  transition: border-color .15s, box-shadow .15s, transform .05s;
}
.level-card:hover { border-color: var(--green-dim); box-shadow: 0 0 16px rgba(61, 255, 122, .15); }
.level-card:active { transform: translateY(1px); }
.level-card.done { border-color: var(--green-dim); }
.lc-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.lc-num { color: var(--dim); font-size: 11px; }
.lc-title { color: var(--green); font-weight: 700; font-size: 15px; }
.lc-concepts { display: flex; flex-wrap: wrap; gap: 4px; margin-top: auto; }
.lc-best { color: var(--amber); font-size: 12px; }

/* ---------- vi game ---------- */
#vi-task { color: var(--amber); font-size: 14px; margin: 4px 0 10px; }
.vi-hint {
  border: 1px dashed var(--amber); background: rgba(255, 204, 68, .08); color: #ffe9a6;
  padding: 10px 12px; border-radius: 6px; margin: 8px 0; font-size: 13px; line-height: 1.5;
}
.vi-keybar { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-top: 10px; }
.vi-keybar-label { color: var(--dim); font-size: 12px; }
.vk {
  background: #0a120a; border: 1px solid #243024; color: var(--text); border-radius: 5px;
  padding: 6px 11px; font-family: var(--font); cursor: pointer; font-size: 13px;
}
.vk:hover { border-color: var(--green-dim); color: var(--green); }

/* ---------- vi editor (rendered by vi-view.js) ---------- */
.vi-editor {
  background: #050805; border: 1px solid #1c2a1f; border-radius: 8px; overflow: hidden;
  display: flex; flex-direction: column; min-height: 360px; outline: none;
}
.vi-editor:focus, .vi-editor:focus-within { border-color: var(--green-dim); box-shadow: 0 0 0 1px var(--green-dim) inset; }
.vi-editor .term-bar { margin: 0; padding: 8px 12px; background: #0c120c; border-bottom: 1px solid #1c2a1f; gap: 8px; }
.term-dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.term-dot.r { background: var(--red); } .term-dot.y { background: var(--amber); } .term-dot.g { background: var(--green); }
.vi-editor .term-title { color: var(--dim); font-size: 13px; margin-left: 6px; }
.vi-body {
  flex: 1; padding: 10px 14px; font-size: 13.5px; line-height: 1.5; overflow-y: auto;
  max-height: 48vh; color: var(--text); tab-size: 4;
}
.vi-line { white-space: pre-wrap; word-break: break-word; min-height: 1.5em; }
.vi-tilde { color: var(--dim); }
.vi-cursor { background: var(--green); color: #050805; border-radius: 1px; }
.vi-cursor.insert { background: transparent; box-shadow: inset 2px 0 0 var(--green); color: inherit; animation: vi-caret 1s steps(2) infinite; }
@keyframes vi-caret { 50% { box-shadow: inset 2px 0 0 transparent; } }
.vi-status {
  display: flex; justify-content: space-between; gap: 14px; align-items: center; font-size: 13px;
  padding: 6px 14px; border-top: 1px solid #1c2a1f; background: #0c120c; color: var(--dim); white-space: pre; min-height: 1.8em;
}
.vi-status .vi-mode { color: var(--amber); font-weight: 700; letter-spacing: 1px; }
.vi-status .vi-cmd { color: var(--green); }
.vi-status .vi-err { color: var(--red); }
.vi-status .vi-pos { color: var(--dim); white-space: nowrap; }

/* ---------- reference ---------- */
.ref-search {
  width: 100%; background: #060a06; border: 1px solid #1c2a1f; color: var(--text);
  font-family: var(--font); font-size: 15px; padding: 11px 13px; border-radius: 6px; outline: none; margin-bottom: 12px;
}
.ref-search:focus { border-color: var(--green-dim); box-shadow: 0 0 0 2px rgba(61, 255, 122, .15); }
.ref-cats { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.ref-cat {
  background: transparent; border: 1px solid #243024; color: var(--dim); border-radius: 999px;
  padding: 4px 12px; font-size: 12px; cursor: pointer; font-family: var(--font);
}
.ref-cat:hover { color: var(--text); }
.ref-cat.active { background: #10240f; border-color: var(--green-dim); color: var(--green); }
.ref-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; max-height: 56vh; overflow-y: auto; padding-right: 4px; }
.ref-card { background: #060a06; border: 1px solid #1c2a1f; border-radius: 8px; padding: 14px; }
.rc-head { display: flex; align-items: baseline; gap: 8px; }
.rc-name { color: var(--green); font-weight: 700; font-size: 16px; }
.rc-cat { color: var(--dim); font-size: 11px; text-transform: uppercase; }
.rc-sum { color: var(--text); font-size: 13px; margin: 6px 0; line-height: 1.45; }
.rc-ex {
  font-family: var(--font); background: #030603; border: 1px solid #1c2a1f; border-radius: 4px;
  padding: 6px 9px; color: var(--blue); font-size: 12.5px; margin-bottom: 8px;
}
.rc-flags { display: flex; flex-direction: column; gap: 3px; }
.rc-flag { font-size: 12px; color: var(--dim); }
.rc-flag b { color: var(--amber); margin-right: 6px; }
.empty { color: var(--dim); padding: 24px; text-align: center; font-style: italic; }

/* ---------- XP leaderboard + achievements ---------- */
.scores li .bot { color: var(--dim); font-size: 10px; border: 1px solid #243024; border-radius: 3px; padding: 0 4px; margin-left: 6px; }
.ach-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.ach-card { background: #060a06; border: 1px solid #1c2a1f; border-radius: 8px; padding: 16px; text-align: center; }
.ach-card.locked { opacity: .45; }
.ach-card.got { border-color: var(--green-dim); box-shadow: 0 0 14px rgba(61, 255, 122, .15); }
.ach-icon { font-size: 30px; }
.ach-name { color: var(--green); font-weight: 700; margin: 6px 0; }
.ach-desc { color: var(--dim); font-size: 12px; line-height: 1.4; }
.ach-state { margin-top: 8px; font-size: 11px; color: var(--amber); }

/* ---------- level-complete modal ---------- */
.lc-trophy { font-size: 38px; }
#lc-title { color: var(--green); margin: 6px 0 0; }
.reward-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(80px, 1fr)); gap: 10px; margin: 16px 0; }
.reward-cell { background: #060a06; border: 1px solid #1c2a1f; border-radius: 6px; padding: 10px 8px; }
.reward-cell .rv { color: var(--green); font-size: 18px; font-weight: 700; }
.reward-cell .rk { color: var(--dim); font-size: 11px; text-transform: uppercase; margin-top: 4px; }

/* ---------- auth + settings panels ---------- */
.modal-box.auth-box, .modal-box.settings-box { max-width: 420px; text-align: left; }
.muted.small { color: var(--dim); font-size: 12px; }
.field.col { flex-direction: column; align-items: stretch; gap: 4px; }
.field.col label { color: var(--dim); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.field.col input {
  background: #060a06; border: 1px solid #1c2a1f; color: var(--text); font-family: var(--font);
  padding: 9px 11px; border-radius: 6px; font-size: 14px; outline: none;
}
.field.col input:focus { border-color: var(--green-dim); }
.auth-error { color: var(--red); font-size: 12.5px; margin: 4px 0; }
.auth-toggle { background: none; border: none; color: var(--blue); cursor: pointer; font-family: var(--font); font-size: 12.5px; margin-top: 10px; padding: 0; }
.setting-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; border-bottom: 1px solid #18221a; }
.setting-row span { color: var(--text); }
.setting-row.col { flex-direction: column; align-items: stretch; gap: 10px; }
.seg { display: flex; gap: 4px; flex-wrap: wrap; }
.seg button {
  background: #0a120a; border: 1px solid #243024; color: var(--dim); padding: 6px 11px;
  border-radius: 5px; cursor: pointer; font-family: var(--font); font-size: 12.5px;
}
.seg button.active { background: #10240f; border-color: var(--green-dim); color: var(--green); }
.btn.danger { background: transparent; color: var(--red); border-color: var(--red); }
.btn.danger:hover { background: rgba(255, 95, 86, .14); }

/* ---------- toast ---------- */
.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--panel); border: 1px solid var(--green-dim); color: var(--text);
  padding: 12px 18px; border-radius: 8px; z-index: 60; box-shadow: 0 10px 30px rgba(0, 0, 0, .5); font-size: 13.5px;
}

/* ---------- reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) { body:not(.motion-on) *, body:not(.motion-on) .crt::after { animation: none !important; } }
body.motion-off *, body.motion-off .crt::after { animation: none !important; transition: none !important; }

/* ========================================================================
   NEON-ARCADE THEME (opt-in via body[data-theme="arcade"]; fonts lazy-loaded)
   ======================================================================== */
body[data-theme="arcade"] {
  --bg: #0a0613; --panel: #170e2c; --text: #ece9ff; --dim: #b7a7e6;
  --green: #2ce8c0; --green-dim: #0fb89a; --amber: #ffd23f; --red: #ff5277; --blue: #ff5dd6;
  --font: 'VT323', 'SF Mono', 'Fira Code', ui-monospace, Menlo, monospace;
  font-size: 18px;
  background: #0a0613 radial-gradient(1100px 560px at 82% -12%, #2a1250 0%, transparent 55%);
}
body[data-theme="arcade"] .terminal { border-color: #3b2a6b; }
body[data-theme="arcade"] .titlebar,
body[data-theme="arcade"] .nav,
body[data-theme="arcade"] .vi-editor .term-bar,
body[data-theme="arcade"] .vi-status { background: #0c0720; border-color: #3b2a6b; }
body[data-theme="arcade"] .tile,
body[data-theme="arcade"] .level-card,
body[data-theme="arcade"] .ref-card,
body[data-theme="arcade"] .hstat,
body[data-theme="arcade"] .ach-card,
body[data-theme="arcade"] .terminal-screen,
body[data-theme="arcade"] .vi-editor { background: #110a22; border-color: #3b2a6b; }