/* =====================================================
   ETHERLEARNING – Memory Game Stylesheet
   ===================================================== */

/* ── Color tokens ───────────────────────────────────── */
:root {
  --mem-easy:           #1a9e6b;
  --mem-easy-light:     rgba(26,158,107,0.08);
  --mem-medium:         #d17e1a;
  --mem-medium-light:   rgba(209,126,26,0.08);
  --mem-hard:           #d13d3d;
  --mem-hard-light:     rgba(209,61,61,0.08);
  --mem-veteran:        #6b3dd1;
  --mem-veteran-light:  rgba(107,61,209,0.08);
}

/* ── Page layout ────────────────────────────────────── */
.memory-page {
  padding: 48px 0 80px;
  min-height: 60vh;
}

/* ── Hero ────────────────────────────────────────────── */
.memory-hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 48px;
  min-height: 200px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--paper-mid);
}

.memory-hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.memory-hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  width: 100%;
}

.memory-hero-text { flex: 1; min-width: 220px; }
.memory-hero-text .section-label { display: block; margin-bottom: 10px; }
.memory-hero-text h1 { margin-bottom: 12px; }
.memory-hero-text p  { margin: 0; font-size: 1.05rem; }

/* ── Level nav card ─────────────────────────────────── */
.memory-level-nav {
  background: var(--paper-warm);
  border: 1px solid var(--paper-mid);
  border-radius: var(--radius-xl);
  padding: 18px 16px;
  width: 272px;
  flex-shrink: 0;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.memory-level-nav-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 4px;
  padding: 0 4px;
}

.memory-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--paper-mid);
  background: var(--paper);
  cursor: pointer;
  transition: all 0.17s ease;
  text-align: left;
  width: 100%;
  font-family: var(--font-body);
}

.memory-nav-item:hover { transform: translateX(4px); box-shadow: var(--shadow-sm); }
.memory-nav-easy:hover    { border-color: var(--mem-easy);    background: var(--mem-easy-light); }
.memory-nav-medium:hover  { border-color: var(--mem-medium);  background: var(--mem-medium-light); }
.memory-nav-hard:hover    { border-color: var(--mem-hard);    background: var(--mem-hard-light); }
.memory-nav-veteran:hover { border-color: var(--mem-veteran); background: var(--mem-veteran-light); }

.memory-nav-icon  { font-size: 1.15rem; flex-shrink: 0; }
.memory-nav-info  { flex: 1; display: flex; flex-direction: column; gap: 1px; }
.memory-nav-info strong { font-size: 0.88rem; font-weight: 700; color: var(--ink); display: block; }
.memory-nav-info span   { font-size: 0.73rem; color: var(--ink-faint); display: block; }
.memory-nav-arrow { font-size: 0.85rem; color: var(--ink-faint); flex-shrink: 0; transition: transform 0.17s, color 0.17s; }
.memory-nav-item:hover .memory-nav-arrow { transform: translateX(3px); color: var(--ink); }

/* ── Utility ─────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  font-family: var(--font-body);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-soft); border-color: var(--accent-soft); color: #fff; }

.btn-secondary {
  background: var(--paper-warm);
  color: var(--ink);
  border-color: var(--paper-mid);
}
.btn-secondary:hover { background: var(--paper-mid); color: var(--ink); }

.btn-ghost {
  background: transparent;
  color: var(--ink-faint);
  border-color: var(--paper-mid);
  padding: 8px 18px;
  font-size: 0.85rem;
}
.btn-ghost:hover { background: var(--paper-warm); color: var(--ink); }

.btn-lg { padding: 15px 36px; font-size: 1.05rem; }

/* ── Mode select screen ─────────────────────────────── */
.mode-select-screen {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  padding-top: 8px;
}

.mode-select-screen .section-label { display: block; margin-bottom: 12px; }
.mode-select-screen h2 { margin-bottom: 10px; }
.mode-select-screen > p { margin: 0 auto 40px; }

.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.mode-card {
  background: var(--paper-warm);
  border: 2px solid var(--paper-mid);
  border-radius: var(--radius-lg);
  padding: 28px 20px 24px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.mode-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.level-card-easy:hover    { border-color: var(--mem-easy);    background: var(--mem-easy-light); }
.level-card-medium:hover  { border-color: var(--mem-medium);  background: var(--mem-medium-light); }
.level-card-hard:hover    { border-color: var(--mem-hard);    background: var(--mem-hard-light); }
.level-card-veteran:hover { border-color: var(--mem-veteran); background: var(--mem-veteran-light); }

.mode-icon { font-size: 2rem; display: block; margin-bottom: 10px; }
.mode-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.mode-card p  { font-size: 0.82rem; color: var(--ink-faint); margin: 0 0 14px; max-width: none; }

.mem-level-meta { display: flex; flex-direction: column; gap: 5px; align-items: center; }
.mem-level-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  display: inline-block;
}
.tag-easy    { background: var(--mem-easy-light);    color: var(--mem-easy); }
.tag-medium  { background: var(--mem-medium-light);  color: var(--mem-medium); }
.tag-hard    { background: var(--mem-hard-light);    color: var(--mem-hard); }
.tag-veteran { background: var(--mem-veteran-light); color: var(--mem-veteran); }

/* ── Game screen ─────────────────────────────────────── */
.game-screen {
  max-width: 680px;
  margin: 0 auto;
  padding-top: 8px;
}

/* HUD */
.mem-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 20px;
  background: var(--paper-warm);
  border: 1px solid var(--paper-mid);
  border-radius: var(--radius-lg);
  margin-bottom: 28px;
}

.hud-item { text-align: center; }
.hud-val  { display: block; font-size: 1.6rem; font-weight: 700; color: var(--ink); font-family: var(--font-display); line-height: 1; }
.hud-lbl  { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-faint); margin-top: 2px; }

/* Active badge */
.active-mem-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}
.badge-easy    { background: var(--mem-easy-light);    color: var(--mem-easy); }
.badge-medium  { background: var(--mem-medium-light);  color: var(--mem-medium); }
.badge-hard    { background: var(--mem-hard-light);    color: var(--mem-hard); }
.badge-veteran { background: var(--mem-veteran-light); color: var(--mem-veteran); }

/* ── Sequence display area ──────────────────────────── */
.sequence-area {
  background: var(--paper-warm);
  border: 1px solid var(--paper-mid);
  border-radius: var(--radius-xl);
  padding: 48px 32px;
  text-align: center;
  margin-bottom: 28px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  position: relative;
}

.sequence-status {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.char-display {
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 900;
  font-family: 'DM Sans', monospace;
  color: var(--accent);
  letter-spacing: 0.04em;
  line-height: 1;
  transition: opacity 0.12s ease, transform 0.12s ease;
  min-height: 1em;
  user-select: none;
}

.char-display.flash-in {
  animation: charFlash 0.25s ease-out;
}

@keyframes charFlash {
  0%   { opacity: 0; transform: scale(0.7); }
  60%  { opacity: 1; transform: scale(1.08); }
  100% { opacity: 1; transform: scale(1); }
}

.progress-dots {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper-mid);
  transition: background 0.2s;
}

.dot.done    { background: var(--accent); }
.dot.current { background: var(--accent-soft); transform: scale(1.3); }

/* Countdown */
.countdown-display {
  font-size: clamp(4rem, 14vw, 8rem);
  font-weight: 900;
  font-family: var(--font-display);
  color: var(--ink);
  animation: countPulse 0.9s ease-in-out;
}

@keyframes countPulse {
  0%   { transform: scale(1.3); opacity: 0.5; }
  40%  { transform: scale(1);   opacity: 1; }
  100% { transform: scale(1);   opacity: 1; }
}

/* ── Input area ─────────────────────────────────────── */
.input-area {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
}

.input-label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.mem-input {
  width: 100%;
  max-width: 480px;
  padding: 16px 20px;
  font-size: 1.6rem;
  font-family: 'DM Sans', monospace;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: center;
  border: 2px solid var(--paper-mid);
  border-radius: var(--radius-md);
  background: var(--paper);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
}

.mem-input:focus { border-color: var(--accent); }
.mem-input::placeholder { color: var(--ink-faint); opacity: 0.5; font-weight: 400; font-size: 1rem; letter-spacing: 0.05em; }

.submit-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Results screen ─────────────────────────────────── */
.results-screen {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
  padding-top: 8px;
}

.results-card {
  background: var(--paper-warm);
  border: 1px solid var(--paper-mid);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  box-shadow: var(--shadow-md);
  margin-top: 20px;
}

.results-emoji { font-size: 3.5rem; display: block; margin-bottom: 14px; }
.results-card h2 { margin-bottom: 8px; }
.results-card > p { margin: 0 auto 28px; }

.results-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Character comparison grid */
.char-compare {
  margin: 24px auto 0;
  max-width: 100%;
}

.compare-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 10px;
}

.compare-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.compare-row-label {
  font-size: 0.7rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  width: 60px;
  text-align: right;
  padding-right: 8px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-shrink: 0;
}

.char-cell {
  width: 44px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
  font-family: 'DM Sans', monospace;
  letter-spacing: 0;
  border: 2px solid var(--paper-mid);
  background: var(--paper);
  color: var(--ink);
  transition: all 0.2s;
}

.char-cell.match   { background: rgba(26,158,107,0.12); border-color: var(--success); color: var(--success); }
.char-cell.miss    { background: rgba(209,61,61,0.10);  border-color: var(--danger);  color: var(--danger); }
.char-cell.empty   { background: var(--paper-warm); color: var(--ink-faint); font-size: 1rem; }

.match-summary {
  margin-top: 20px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.match-summary strong { color: var(--accent); font-size: 1.4rem; }

/* ── Stat display for score area ────────────────────── */
.results-stats {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 20px 0 0;
}

.result-stat {
  background: var(--paper);
  border: 1px solid var(--paper-mid);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  text-align: center;
  min-width: 90px;
}

.result-stat .val { display: block; font-size: 1.6rem; font-weight: 700; color: var(--ink); line-height: 1; font-family: var(--font-display); }
.result-stat .lbl { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-faint); margin-top: 4px; display: block; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 760px) {
  .memory-level-nav { width: 100%; }
  .memory-hero-inner { flex-direction: column; align-items: flex-start; }
  .char-cell { width: 36px; height: 44px; font-size: 1rem; }
  .mem-input { font-size: 1.25rem; }
  .sequence-area { padding: 36px 20px; }
}

@media (max-width: 480px) {
  .char-cell { width: 30px; height: 38px; font-size: 0.88rem; }
  .compare-row-label { display: none; }
  .results-card { padding: 28px 20px; }
}