/* Command Quest - no framework, no build step.
   One file, custom properties at the top, mobile handled by one media query. */

:root {
  --bg: #12141a;
  --panel: #1a1d26;
  --panel-2: #21242f;
  --line: #2c3040;
  --ink: #e6e8ef;
  --ink-dim: #9aa0b4;
  --accent: #7fd1a0;
  --accent-dim: #3d6b52;
  --warn: #f0a868;
  --error: #f07878;
  --folder: #8ab4f8;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

/* The browser hides [hidden] via `display: none` in its own stylesheet, which
   ANY author `display` rule outranks. Several elements here are both toggled
   with `hidden` and given `display: grid/flex`, so without this they never
   actually hide. One of the few honest uses of !important: restoring a default
   that the layout rules below overrode by accident. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
}

code { font-family: var(--mono); }

/* ---------- buttons ---------- */

.btn {
  font: inherit;
  padding: .55rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
  color: var(--ink);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.btn:hover { border-color: var(--accent-dim); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: #10231a; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--ink-dim); }
.btn-sm { padding: .3rem .6rem; font-size: .85rem; }

/* ---------- profile gate ---------- */

.gate {
  display: grid;
  place-items: center;
  min-height: 100%;
  padding: 1.5rem;
}
.gate-card {
  width: min(26rem, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 2rem;
}
.gate-title { margin: 0; font-size: 1.9rem; letter-spacing: -.02em; }
.gate-tagline { margin: .3rem 0 1.6rem; color: var(--ink-dim); }
.gate-choices { display: grid; gap: .6rem; }
.gate-form { display: grid; gap: .9rem; }
.gate-form-title { margin: 0; font-size: 1.05rem; }
.field { display: grid; gap: .3rem; font-size: .9rem; color: var(--ink-dim); }
.field input {
  font: inherit;
  font-family: var(--mono);
  padding: .55rem .7rem;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.field input:focus { outline: none; border-color: var(--accent); }
.field-note { margin: -.3rem 0 0; font-size: .8rem; color: var(--ink-dim); }
.gate-error { margin: 0; color: var(--error); font-size: .9rem; }
.gate-actions { display: flex; gap: .6rem; }

/* ---------- app shell ---------- */

.app { display: flex; flex-direction: column; height: 100%; }

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .6rem 1rem;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.topbar-brand { font-weight: 600; letter-spacing: -.01em; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: .7rem; }
.who { color: var(--ink-dim); font-size: .9rem; }

.progress { display: flex; align-items: center; gap: .5rem; }
.progress-dots { display: flex; gap: .3rem; }
.dot { width: .55rem; height: .55rem; border-radius: 50%; background: var(--line); }
.dot.on { background: var(--accent); }
.progress-label { color: var(--ink-dim); font-size: .85rem; font-variant-numeric: tabular-nums; }

.status {
  padding: .5rem 1rem;
  background: #2a2418;
  color: var(--warn);
  font-size: .9rem;
  border-bottom: 1px solid var(--line);
}
.status.error { background: #2a1a1a; color: var(--error); }

/* ---------- three panels ---------- */

.panels {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(15rem, 1fr) minmax(20rem, 1.6fr) minmax(13rem, .9fr);
  gap: 1px;
  background: var(--line);
  min-height: 0;
}

.panel {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  min-height: 0;
  min-width: 0;
}
.panel-head {
  margin: 0;
  padding: .5rem 1rem;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--ink-dim);
  border-bottom: 1px solid var(--line);
}
.panel-body { padding: 1rem; overflow-y: auto; }

/* lesson */
.tabs { display: flex; flex-wrap: wrap; gap: .3rem; padding: .6rem 1rem 0; }
.tab {
  font: inherit;
  font-size: .85rem;
  font-family: var(--mono);
  padding: .25rem .6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-dim);
  cursor: pointer;
}
.tab[aria-selected="true"] { background: var(--accent-dim); color: var(--ink); border-color: var(--accent-dim); }
.tab.done::after { content: " ✓"; color: var(--accent); }
.lesson-title { margin: 0 0 .5rem; font-size: 1.15rem; }
.lesson-body { margin: 0 0 1rem; color: var(--ink-dim); }
.lesson-example { margin: 0; font-size: .9rem; color: var(--ink-dim); }
.lesson-example code { color: var(--accent); }

/* terminal */
.term {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  font-family: var(--mono);
  font-size: .875rem;
  white-space: pre-wrap;
  word-break: break-word;
}
.term-line { margin: 0 0 .35rem; }
.term-echo { color: var(--ink); }
.term-echo::before { content: "$ "; color: var(--accent); }
.term-ok { color: var(--accent); }
.term-no { color: var(--warn); }
.term-hint { color: var(--ink-dim); }
.term-form {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1rem;
  border-top: 1px solid var(--line);
  background: var(--panel-2);
}
.term-prompt { color: var(--accent); font-family: var(--mono); }
.term-input {
  flex: 1;
  font: inherit;
  font-family: var(--mono);
  background: transparent;
  border: 0;
  color: var(--ink);
}
.term-input:focus { outline: none; }

/* files */
.breadcrumb { margin: 0 0 .7rem; font-size: .85rem; color: var(--ink-dim); }
.breadcrumb code { color: var(--folder); }
.tree { list-style: none; margin: 0; padding: 0; font-family: var(--mono); font-size: .875rem; }
.tree li { padding: .12rem 0; }
.tree .is-folder { color: var(--folder); }
.tree .is-empty { color: var(--ink-dim); font-style: italic; font-family: var(--sans); }
.tree ul { list-style: none; margin: 0; padding-left: 1rem; }

/* Briefly highlights whatever the last command changed - the moment that makes
   an invisible CLI effect visible. */
@keyframes flash { from { background: var(--accent-dim); } to { background: transparent; } }
.tree .just-added { animation: flash 1.1s ease-out; border-radius: 4px; }

/* ---------- narrow screens ---------- */

@media (max-width: 860px) {
  .panels { grid-template-columns: 1fr; }
  .panel-terminal { order: -1; }
  .term { min-height: 12rem; max-height: 45vh; }
  .panel-body { max-height: 30vh; }
  .topbar { flex-wrap: wrap; gap: .5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .tree .just-added { animation: none; }
}