*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --bg:              #0d1117;
  --surface:         #161b22;
  --surface2:        #21262d;
  --border:          #30363d;
  --accent:          #58a6ff;
  --text:            #e6edf3;
  --text-muted:      #8b949e;
  --key-bg:          #21262d;
  --key-border:      #30363d;
  --key-shadow:      #010409;
  --key-active-bg:   #58a6ff;
  --key-active-bdr:  #79c0ff;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px;
  gap: 18px;
}

header { text-align: center; }
h1 { font-size: 1.8rem; font-weight: 700; color: var(--accent); letter-spacing: -0.03em;
     display: flex; align-items: center; justify-content: center; gap: 10px; }
h1 img { height: 36px; width: auto; border-radius: 8px; }
.tagline { color: var(--text-muted); font-size: 0.82rem; margin-top: 3px; }

/* ── Controls ── */
.controls {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

.ctrl-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
}

.ctrl-group { display: flex; align-items: center; gap: 6px; }
label { font-size: 0.78rem; color: var(--text-muted); }

select {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.8rem;
  cursor: pointer;
  outline: none;
}
select:focus { border-color: var(--accent); }

button {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background .12s, border-color .12s;
}
button:hover  { border-color: var(--accent); }
button.on     { background: var(--accent); color: #0d1117; border-color: var(--accent); font-weight: 600; }

/* ── Keyboard ── */
.kb-wrap { transition: filter .3s; }
.kb-wrap.blind { filter: blur(28px) brightness(0.15); pointer-events: none; }
.kb-main-row { display: flex; gap: 12px; align-items: flex-start; }

.keyboard {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  box-shadow: 0 8px 28px rgba(0,0,0,.65);
}

/* Numpad overrides keyboard flex with a real grid */
#numpad {
  display: grid !important;
  grid-template-columns: repeat(4, 42px);
  grid-template-rows: repeat(5, 44px);
}
#numpad .key { height: auto; align-self: stretch; justify-content: center; }

.kb-row { display: flex; gap: 5px; justify-content: flex-start; }

.key {
  position: relative;
  background: var(--key-bg);
  border: 1px solid var(--key-border);
  border-bottom: 3px solid var(--key-shadow);
  border-radius: 6px;
  min-width: 42px;
  height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  padding: 3px 5px;
  color: var(--text);
  transition: background .06s, transform .06s, border-bottom-width .06s;
  user-select: none;
}

.key.home-row {
  background: #1e2a20;
  border-color: #3a6b40;
  border-bottom-color: #0d180f;
}

.key.active {
  background: var(--key-active-bg);
  border-color: var(--key-active-bdr);
  border-bottom-width: 1px;
  transform: translateY(2px);
  color: #0d1117;
}

.key .main  { font-size: 0.82rem; font-weight: 500; line-height: 1; }
.key .shft  { position: absolute; top: 3px; left: 5px; font-size: 0.58rem; color: var(--text-muted); line-height: 1; }
.key .agr   { position: absolute; top: 3px; right: 5px; font-size: 0.58rem; color: #79c0ff; line-height: 1; }
.key .sp    { font-size: 0.7rem; color: var(--text-muted); }
.key.active .shft,
.key.active .agr,
.key.active .sp  { color: rgba(0,0,0,.55); }

/* width helpers — units: 1u = 42px key + 5px gap = 47px effective
   ISO stagger: Tab=1.5u, CapsLock=1.75u, LShift=1.25u, RShift=2.75u
   ANSI stagger: LShift=2.25u, RShift=2.75u                          */
.w12  { min-width:  53px; }   /* 1.25u — ISO LShift                  */
.w15  { min-width:  63px; }   /* 1.5u  — Tab                         */
.w175 { min-width:  74px; }   /* 1.75u — CapsLock                    */
.w2   { min-width:  89px; }   /* 2u    — Backspace, Enter             */
.w225 { min-width:  95px; }   /* 2.25u — ANSI LShift                 */
.w25  { min-width: 110px; }   /* 2.5u  — RShift (≈2.75u)             */
.w65  { min-width: 262px; }   /* space bar                            */


/* ── Practice area ── */
.practice {
  width: 100%;
  max-width: 740px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.display {
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 1.3rem;
  min-height: 52px;
  word-break: break-all;
  line-height: 1.7;
}

.cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent);
  vertical-align: text-bottom;
  border-radius: 1px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 0%,49%{opacity:1} 50%,100%{opacity:0} }
.display .sel { background: rgba(88,166,255,.25); border-radius: 2px; }

.stats { display: flex; gap: 32px; justify-content: center; }
.stat  { text-align: center; }
.stat .val { font-size: 1.6rem; font-weight: 700; color: var(--accent); line-height: 1; }
.stat .lbl { font-size: 0.68rem; color: var(--text-muted); margin-top: 2px; }

.practice-footer { display: flex; justify-content: flex-end; }

/* ── Mode bar ── */
.mode-bar {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.mode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 32px;
  min-width: 155px;
  border-radius: 12px;
  transition: background .12s, border-color .12s, transform .1s;
}
.mode-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.mode-card.on    { background: var(--accent); color: #0d1117; border-color: var(--accent); }

.mode-icon { font-size: 1.6rem; line-height: 1; }
.mode-name { font-size: 0.88rem; font-weight: 700; }
.mode-desc { font-size: 0.68rem; color: var(--text-muted); }
.mode-card.on .mode-desc { color: rgba(0,0,0,.55); }

/* ── Exercise mode ── */
.exercise-panel {
  width: 100%;
  max-width: 740px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ex-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
}

.ex-sent-btns { display: flex; gap: 4px; }

.exercise-target {
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 1.25rem;
  line-height: 1.8;
  min-height: 52px;
  word-break: break-word;
}

.ch-ok   { color: #3fb950; }
.ch-err  { color: #f85149; }
.ch-cur  { background: var(--accent); color: #0d1117; border-radius: 2px; padding: 0 1px; }
.ch-todo { color: var(--text-muted); }

.ex-reference {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 0.95em;
  opacity: 0.75;
}
.ch-ref     { color: var(--text-muted); }
.ch-ref-err { color: #f85149; font-weight: 700; }

/* ── Completion modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 340px;
  box-shadow: 0 16px 48px rgba(0,0,0,.8);
}

.modal h2 { color: var(--accent); font-size: 1.4rem; text-align: center; }
.modal-stats { display: flex; gap: 20px; justify-content: center; }

.modal input[type="text"] {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.9rem;
  outline: none;
  width: 100%;
}
.modal input[type="text"]:focus { border-color: var(--accent); }

.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* ── Hall of Fame ── */
.hof-panel {
  width: 100%;
  max-width: 740px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.hof-panel h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: .05em;
}

.hof-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.hof-table th {
  color: var(--text-muted);
  text-align: left;
  padding: 4px 10px;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}
.hof-table td { padding: 7px 10px; border-bottom: 1px solid var(--border); }
.hof-table tr:last-child td { border-bottom: none; }
.hof-table .rank { color: var(--text-muted); font-size: 1rem; }
.hof-table .name { font-weight: 600; }
.hof-table .wpm  { color: var(--accent); font-weight: 700; font-size: 1rem; }
.hof-rank-1 td   { background: rgba(255,215,0,.06); }
.hof-rank-2 td   { background: rgba(192,192,192,.04); }
.hof-rank-3 td   { background: rgba(205,127,50,.04); }

/* ── Badges ── */
.badge {
  position: fixed;
  font-size: 0.66rem;
  color: var(--text-muted);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
}
#badge        { bottom: 10px; right: 14px; }
#versionBadge { top: 10px; right: 14px; }
#playerBadge  { top: 34px; right: 14px; font-size: 0.72rem; color: var(--accent); }

/* ── Theme bar ── */
.theme-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
}
.theme-bar label { font-size: 0.85rem; color: var(--text-muted); white-space: nowrap; }
#themeSel { font-size: 0.95rem; padding: 8px 14px; }