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

:root {
  --bg:      #0a0a12;
  --surface: #13131f;
  --border:  #252540;
  --primary: #00e87a;
  --accent:  #00aaff;
  --warn:    #ffcc00;
  --error:   #ff4455;
  --text:    #dde0ee;
  --dim:     #55587a;
  --dit:     #00e87a;
  --dah:     #00aaff;
  --font: 'Courier New', Consolas, monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
}

.dim { color: var(--dim); }

/* ── Learn view ───────────────────────────────── */
#learn-view {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 680px;
  margin: 0 auto;
  padding: 0.7rem 0.8rem;
  gap: 0.55rem;
}

/* Header */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border);
}

.score-display {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--dim);
}

#streak-text { color: var(--warn); font-size: 0.82rem; }

.speed-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--dim);
}

#speed-display { min-width: 5ch; text-align: center; color: var(--text); font-size: 0.82rem; }

.btn-small {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: var(--font);
  font-size: 0.95rem;
  width: 1.6rem; height: 1.6rem;
  border-radius: 4px;
  cursor: pointer;
  line-height: 1;
  transition: color 0.12s, border-color 0.12s;
}
.btn-small:hover { color: var(--text); border-color: var(--text); }

.btn-replay {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--dim);
  font-size: 0.9rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 0.3rem;
  transition: color 0.12s, border-color 0.12s;
}
.btn-replay:hover { color: var(--text); border-color: var(--accent); }
.btn-replay:disabled { opacity: 0.35; cursor: default; }

/* ── Cards ────────────────────────────────────── */
#cards-panel {
  display: flex;
  gap: 0.8rem;
  flex-shrink: 0;
}

.card {
  flex: 1;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 0.8rem 0.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  transition: border-color 0.18s, box-shadow 0.18s;
}

.card-label {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: var(--dim);
  text-transform: uppercase;
}

.card-letter {
  font-size: clamp(2.6rem, 9vw, 4.5rem);
  font-weight: bold;
  line-height: 1;
  letter-spacing: 0.02em;
  transition: color 0.15s;
}

#target-card .card-letter { color: var(--warn); text-shadow: 0 0 20px rgba(255,204,0,0.2); }
#user-card .card-letter   { color: var(--dim); }

#user-card.has-input .card-letter { color: var(--text); }
#user-card.correct   { border-color: var(--primary); box-shadow: 0 0 16px rgba(0,232,122,0.13); }
#user-card.correct .card-letter { color: var(--primary); }
#user-card.wrong     { border-color: var(--error); box-shadow: 0 0 16px rgba(255,68,85,0.12); }
#user-card.wrong .card-letter   { color: var(--error); }

.card-morse {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  min-height: 14px;
}

.sym-dit, .sym-dah {
  display: inline-block;
  animation: popIn 0.1s ease-out;
}
.sym-dit {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--dit);
  box-shadow: 0 0 5px rgba(0,232,122,0.4);
}
.sym-dah {
  width: 30px; height: 10px;
  border-radius: 5px;
  background: var(--dah);
  box-shadow: 0 0 5px rgba(0,170,255,0.4);
}

@keyframes popIn {
  from { transform: scale(0.3); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

/* ── Feedback ─────────────────────────────────── */
#feedback-banner {
  text-align: center;
  font-size: 0.95rem;
  letter-spacing: 0.07em;
  min-height: 1.3rem;
  flex-shrink: 0;
}
#feedback-banner.correct { color: var(--primary); }
#feedback-banner.wrong   { color: var(--error); }
#feedback-banner.waiting { color: var(--dim); }

/* ── Timing panel ─────────────────────────────── */
#timing-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  flex-shrink: 0;
  min-height: 3.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#timing-entries {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.te {
  display: grid;
  grid-template-columns: 1.6rem 1fr 3.4rem 3.8rem;
  align-items: center;
  gap: 0.35rem;
  animation: fadeIn 0.12s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: none; }
}

.te-label {
  font-size: 0.72rem;
  font-weight: bold;
  letter-spacing: 0.05em;
}
.te-label.dit { color: var(--dit); }
.te-label.dah { color: var(--dah); }

/* bar track */
.te-track {
  position: relative;
  height: 18px;
  background: rgba(255,255,255,0.04);
  border-radius: 4px;
  overflow: hidden;
}

/* reference bar (ghost) */
.te-ref-bar {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  border-radius: 4px;
  opacity: 0.22;
}
.te-ref-bar.dit { background: var(--dit); }
.te-ref-bar.dah { background: var(--dah); }

/* actual bar */
.te-act-bar {
  position: absolute;
  top: 2px; left: 0;
  height: calc(100% - 4px);
  border-radius: 3px;
  transition: width 0.12s ease-out;
}
.te-act-bar.dit { background: var(--dit); }
.te-act-bar.dah { background: var(--dah); }

/* reference tick (a thin line) */
.te-tick {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: rgba(255,255,255,0.55);
  border-radius: 1px;
}

/* actual value */
.te-val {
  font-size: 0.78rem;
  text-align: right;
  color: var(--text);
  white-space: nowrap;
}

/* deviation */
.te-diff {
  font-size: 0.72rem;
  text-align: right;
  white-space: nowrap;
}
.te-diff.good  { color: var(--primary); }
.te-diff.warn  { color: var(--warn); }
.te-diff.bad   { color: var(--error); }

/* ── Press area ───────────────────────────────── */
#press-area {
  flex: 1;
  border-radius: 12px;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  -webkit-touch-callout: none;
  touch-action: none;
  transition: border-color 0.07s, background 0.07s, box-shadow 0.07s;
  min-height: 80px;
}

#press-area.press-idle    { background: var(--surface); }
#press-area.press-idle:hover { border-color: var(--dim); }
#press-area.press-active  {
  border-color: var(--primary);
  background: rgba(0,232,122,0.05);
  box-shadow: inset 0 0 40px rgba(0,232,122,0.06), 0 0 14px rgba(0,232,122,0.1);
}
#press-area.press-locked  { background: var(--surface); opacity: 0.4; cursor: not-allowed; }

#press-hint {
  text-align: center;
  pointer-events: none;
}
.hint-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  line-height: 2;
  color: var(--dim);
}
.hint-row strong { color: var(--text); }
.hint-dot  { width: 9px; height: 9px; border-radius: 50%; background: var(--dit); display: inline-block; }
.hint-dash { width: 27px; height: 9px; border-radius: 4px; background: var(--dah); display: inline-block; }

/* ── Mobile ───────────────────────────────────── */
@media (max-width: 420px) {
  .te { grid-template-columns: 1.4rem 1fr 3rem 3.2rem; }
  .card-letter { font-size: clamp(2rem, 9vw, 3.5rem); }
}