/* Interview Mastery — app.css
   Dark theme, mobile-first, no framework */

/* ── Reset & base ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #0f1117;
  --surface:     #1a1d27;
  --surface2:    #21253a;
  --border:      #2d3249;
  --text:        #e2e4ed;
  --muted:       #8b90a7;
  --accent:      #6c8ef7;
  --accent-glow: rgba(108,142,247,.18);
  --green:       #3ecf8e;
  --amber:       #f6c94e;
  --red:         #f66060;
  --code-bg:     #161b2e;
  --radius:      10px;
  --font-mono:   'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, 'Inter', 'Segoe UI', sans-serif;
  line-height: 1.65;
  min-height: 100dvh;
}

/* ── App header ──────────────────────────────────────────────── */
#app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 1rem 1.25rem .75rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

#header-left { display: flex; align-items: baseline; gap: .75rem; }

#app-header h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
}

#q-count {
  font-size: .8rem;
  color: var(--muted);
}

#recall-toggle {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .85rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}
#recall-toggle input { accent-color: var(--accent); }

/* ── Filters ─────────────────────────────────────────────────── */
#filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .75rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 57px;
  z-index: 99;
}

#search {
  flex: 1 1 200px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: .45rem .7rem;
  font-size: .88rem;
  outline: none;
  transition: border-color .15s;
}
#search:focus { border-color: var(--accent); }
#search::placeholder { color: var(--muted); }

select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: .45rem .55rem;
  font-size: .82rem;
  outline: none;
  cursor: pointer;
  transition: border-color .15s;
}
select:focus { border-color: var(--accent); }

/* ── Question list ───────────────────────────────────────────── */
#question-list {
  list-style: none;
  padding: .5rem 0 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.q-row {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .85rem 1.25rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background .12s;
}
.q-row:hover,
.q-row:focus-visible {
  background: var(--surface);
  outline: none;
}
.q-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.q-num {
  font-size: .75rem;
  font-family: var(--font-mono);
  color: var(--muted);
  min-width: 2.2rem;
  padding-top: .15rem;
  flex-shrink: 0;
}

.q-text {
  flex: 1;
  font-size: .97rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.5;
}

.q-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  align-items: flex-start;
  flex-shrink: 0;
}

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: .18rem .5rem;
  border-radius: 4px;
  font-size: .72rem;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: .01em;
}

.badge.track {
  background: var(--accent-glow);
  color: var(--accent);
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.badge.level.mid    { background: rgba(62,207,142,.12); color: var(--green); }
.badge.level.senior { background: rgba(246,201,78,.12);  color: var(--amber); }
.badge.level.staff  { background: rgba(246,96,96,.12);   color: var(--red); }

.badge.asked-high { background: rgba(246,96,96,.1); color: #ff8a80; font-size: .68rem; }

.badge.asked.very-high { background: rgba(246,96,96,.15); color: var(--red); }
.badge.asked.high      { background: rgba(246,201,78,.12); color: var(--amber); }
.badge.asked.low       { background: var(--surface2); color: var(--muted); }

/* ── Answer view ─────────────────────────────────────────────── */
#answer-view {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 0 3rem;
}

/* Nav bar */
#answer-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

#answer-nav-right { display: flex; gap: .5rem; }

button {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: .45rem .85rem;
  font-size: .85rem;
  cursor: pointer;
  transition: background .12s, border-color .12s;
}
button:hover { background: var(--border); }
button:disabled { opacity: .3; cursor: default; }

#back-btn {
  color: var(--accent);
  border-color: var(--accent-glow);
  background: var(--accent-glow);
  font-weight: 600;
}
#back-btn:hover { background: rgba(108,142,247,.28); }

/* Answer article */
#answer-article {
  padding: 1.5rem 1.25rem 0;
}

#answer-header {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

#answer-question {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: .6rem;
}

#answer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

/* Recall reveal bar */
#recall-reveal-bar {
  text-align: center;
  padding: 2rem 1rem;
}
#reveal-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  padding: .75rem 2rem;
  border-radius: 8px;
}
#reveal-btn:hover { background: #5a7ce6; }

/* Layers */
.layer {
  margin-bottom: 1.5rem;
}

.layer-title {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--accent);
  margin-bottom: .5rem;
  padding-bottom: .3rem;
  border-bottom: 1px solid var(--border);
}

/* Special layer tints */
#layer-say-this {
  background: rgba(108,142,247,.05);
  border: 1px solid rgba(108,142,247,.18);
  border-radius: var(--radius);
  padding: 1rem;
}
#layer-say-this .layer-title { border-color: rgba(108,142,247,.3); }

#layer-remember {
  background: rgba(62,207,142,.04);
  border: 1px solid rgba(62,207,142,.2);
  border-radius: var(--radius);
  padding: 1rem;
}
#layer-remember .layer-title { color: var(--green); border-color: rgba(62,207,142,.3); }

#layer-pushback {
  background: rgba(246,201,78,.03);
  border: 1px solid rgba(246,201,78,.15);
  border-radius: var(--radius);
  padding: 1rem;
}
#layer-pushback .layer-title { color: var(--amber); border-color: rgba(246,201,78,.25); }

/* ── Markdown content styles ─────────────────────────────────── */
.layer-body p { margin-bottom: .75rem; }
.layer-body p:last-child { margin-bottom: 0; }

.layer-body ul {
  padding-left: 1.4rem;
  margin-bottom: .75rem;
}
.layer-body li { margin-bottom: .4rem; }

.layer-body blockquote {
  border-left: 3px solid var(--accent);
  padding: .5rem .9rem;
  margin: .5rem 0;
  background: var(--surface2);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--muted);
}

.layer-body code {
  font-family: var(--font-mono);
  font-size: .83em;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: .1em .3em;
}

.layer-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: .75rem 0;
  font-size: .84rem;
}
.layer-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 1em;
  color: #c9d1e0;
  line-height: 1.6;
}

.layer-body strong { font-weight: 700; color: #fff; }
.layer-body em { color: var(--amber); font-style: italic; }

.layer-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1rem 0;
}

/* ── Mobile tweaks ───────────────────────────────────────────── */
@media (max-width: 600px) {
  #app-header h1 { font-size: 1rem; }
  .q-badges { display: none; }          /* hide on mobile list to save space */
  .q-text { font-size: .92rem; }
  #answer-question { font-size: 1.1rem; }
  #answer-article { padding: 1rem .9rem 0; }
  #answer-nav { padding: .6rem .9rem; }
  button { font-size: .8rem; padding: .4rem .6rem; }
  select, #search { font-size: .82rem; }
}

/* ── Scrollbar ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }