/* ===== Mosquito Hearing Test — Color Design System ===== */

:root {
  /* --- Brand --- */
  --mht-primary:        #0650cb;
  --mht-primary-dark:   #0440a0;
  --mht-primary-light:  #dce8fb;

  /* --- Text --- */
  --mht-text-primary:   #1a1a1a;
  --mht-text-secondary: #555555;
  --mht-text-muted:     #999999;
  --mht-text-inverse:   #ffffff;
  --mht-text-info:      #0440a0;

  /* --- Background --- */
  --mht-bg-base:        #ffffff;
  --mht-bg-subtle:      #f7f8fa;
  --mht-bg-info:        #dce8fb;

  /* --- Border --- */
  --mht-border-light:   #e4e7ec;
  --mht-border-base:    #c9cdd6;

  /* --- State: heard / unheard --- */
  --mht-heard-bg:       #dce8fb;
  --mht-heard-border:   #0650cb;
  --mht-heard-text:     #0440a0;
  --mht-unheard-bg:     #f7f8fa;

  /* --- Misc --- */
  --mht-warning-bg:     #fdfaef;
  --mht-warning-border: #e8d88a;
  --mht-warning-text:   #7a6300;
  --mht-dot-skipped:    #d0d3da;

  /* --- Layout --- */
  --mht-radius:         6px;
  --mht-font:           "Hiragino Sans","Yu Gothic UI","Meiryo",sans-serif;
}

/* ===== Dark mode overrides ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --mht-text-primary:   #e8e8e8;
    --mht-text-secondary: #aaaaaa;
    --mht-text-muted:     #666666;
    --mht-text-inverse:   #ffffff;
    --mht-text-info:      #7aaff0;

    --mht-bg-base:        #1c1c1e;
    --mht-bg-subtle:      #28282c;
    --mht-bg-info:        #0d2a52;

    --mht-border-light:   #3a3a40;
    --mht-border-base:    #4a4a52;

    --mht-heard-bg:       #0d2a52;
    --mht-heard-border:   #4a84e0;
    --mht-heard-text:     #7aaff0;
    --mht-unheard-bg:     #28282c;

    --mht-warning-bg:     #2a2510;
    --mht-warning-border: #6b5c20;
    --mht-warning-text:   #c8b060;

    --mht-dot-skipped:    #444450;
  }
}

/* ===================================================
   Layout
=================================================== */
.mht-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  font-family: var(--mht-font);
  color: var(--mht-text-primary);
  background: var(--mht-bg-base);
  line-height: 1.8;
}

/* ===================================================
   Intro
=================================================== */
.mht-title {
  font-size: 1.2rem;
  font-weight: 600;
  padding-left: 10px;
  border-left: 3px solid var(--mht-primary);
  border-radius: 0;
  margin: 0 0 10px;
  line-height: 1.4;
  color: var(--mht-text-primary);
}
.mht-desc {
  font-size: 0.87rem;
  color: var(--mht-text-secondary);
  line-height: 1.9;
  margin: 0 0 10px;
}
.mht-notice {
  display: flex;
  align-items: baseline;
  gap: 8px;
  background: var(--mht-warning-bg);
  border: 1px solid var(--mht-warning-border);
  padding: 8px 12px;
  font-size: 0.8rem;
  color: var(--mht-warning-text);
  border-radius: var(--mht-radius);
  margin-bottom: 20px;
}
.mht-notice-icon { font-weight: 600; flex-shrink: 0; }

/* ===================================================
   Volume Panel
=================================================== */
.mht-controls-panel {
  background: var(--mht-bg-subtle);
  border: 1px solid var(--mht-border-light);
  border-radius: var(--mht-radius);
  padding: 12px 14px;
  margin-bottom: 18px;
}
.mht-volume-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.mht-volume-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--mht-text-secondary);
  white-space: nowrap;
}
.mht-volume-inner { display: flex; align-items: center; gap: 6px; flex: 1; }
.mht-vol-text { font-size: 0.72rem; color: var(--mht-text-muted); }
.mht-volume-inner input[type=range] { flex: 1; accent-color: var(--mht-primary); cursor: pointer; }
.mht-volume-val { font-size: 0.8rem; font-weight: 500; color: var(--mht-primary); min-width: 2.5em; text-align: right; }
.mht-step-hint { font-size: 0.78rem; color: var(--mht-text-muted); line-height: 1.6; margin: 0; }

/* ===================================================
   Card Grid
=================================================== */
.mht-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}

.mht-card {
  background: var(--mht-bg-base);
  border: 1px solid var(--mht-border-light);
  border-radius: var(--mht-radius);
  padding: 12px 10px 10px;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
}
.mht-card[data-state="yes"] {
  background: var(--mht-heard-bg);
  border-color: var(--mht-heard-border);
}
.mht-card[data-state="no"] {
  background: var(--mht-unheard-bg);
  border-color: var(--mht-border-light);
}

.mht-card-header { margin-bottom: 8px; }
.mht-hz {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--mht-text-primary);
  margin-bottom: 3px;
}
.mht-age-badge {
  display: inline-block;
  font-size: 0.7rem;
  background: var(--mht-bg-subtle);
  color: var(--mht-text-secondary);
  border-radius: var(--mht-radius);
  padding: 1px 8px;
}
.mht-card[data-state="yes"] .mht-age-badge {
  background: var(--mht-heard-bg);
  color: var(--mht-heard-text);
}

/* ===================================================
   Play Button
=================================================== */
.mht-play-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 100%;
  padding: 6px 0;
  background: var(--mht-primary);
  color: var(--mht-text-inverse);
  border: none;
  border-radius: var(--mht-radius);
  font-size: 0.78rem;
  font-weight: 500;
  font-family: var(--mht-font);
  cursor: pointer;
  transition: background 0.15s;
  margin-bottom: 6px;
}
.mht-play-btn:hover   { background: var(--mht-primary-dark); }
.mht-play-btn.playing { background: var(--mht-text-secondary); }

.mht-play-icon {
  display: inline-block;
  width: 0; height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--mht-text-inverse);
}
.mht-play-btn.playing .mht-play-icon {
  width: 6px; height: 7px;
  border: none;
  background: var(--mht-text-inverse);
  border-radius: 1px;
}

/* ===================================================
   Answer Buttons
=================================================== */
.mht-answer-row { display: flex; gap: 4px; }
.mht-answer {
  flex: 1;
  padding: 5px 2px;
  font-size: 0.75rem;
  font-family: var(--mht-font);
  border: 1px solid var(--mht-border-light);
  border-radius: var(--mht-radius);
  background: var(--mht-bg-base);
  cursor: pointer;
  color: var(--mht-text-secondary);
  transition: all 0.15s;
}
.mht-answer:hover { border-color: var(--mht-primary); color: var(--mht-primary); }
.mht-answer.selected-yes {
  background: var(--mht-primary);
  border-color: var(--mht-primary);
  color: var(--mht-text-inverse);
  font-weight: 500;
}
.mht-answer.selected-no {
  background: var(--mht-bg-subtle);
  border-color: var(--mht-border-base);
  color: var(--mht-text-primary);
  font-weight: 500;
}
.mht-selected-label {
  font-size: 0.7rem;
  margin-top: 4px;
  min-height: 1em;
  color: var(--mht-text-muted);
}
.mht-card[data-state="yes"] .mht-selected-label { color: var(--mht-heard-text); }

/* ===================================================
   Progress
=================================================== */
.mht-progress-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.mht-progress-text { font-size: 0.78rem; color: var(--mht-text-secondary); white-space: nowrap; }
.mht-progress-bar-wrap {
  flex: 1; height: 3px;
  background: var(--mht-border-light);
  border-radius: 99px; overflow: hidden;
}
.mht-progress-bar {
  height: 100%;
  background: var(--mht-primary);
  border-radius: 99px;
  transition: width 0.3s ease;
}

/* ===================================================
   Partial Notice
=================================================== */
.mht-partial-notice {
  font-size: 0.78rem;
  color: var(--mht-text-secondary);
  background: var(--mht-bg-subtle);
  border: 1px solid var(--mht-border-light);
  border-radius: var(--mht-radius);
  padding: 8px 12px;
  margin-bottom: 12px;
  line-height: 1.6;
  display: none;
}
.mht-partial-notice.visible { display: block; }

/* ===================================================
   Action Buttons
=================================================== */
.mht-actions { display: flex; gap: 8px; margin-bottom: 1.5rem; }

.mht-diagnose-btn {
  flex: 1;
  padding: 11px;
  border: none;
  border-radius: var(--mht-radius);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--mht-font);
  cursor: pointer;
  letter-spacing: 0.03em;
  transition: background 0.15s, opacity 0.15s, color 0.15s, border-color 0.15s;
}
.mht-diagnose-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: var(--mht-bg-subtle);
  color: var(--mht-text-muted);
  border: 1px solid var(--mht-border-light);
}
.mht-diagnose-btn.partial {
  background: var(--mht-bg-subtle);
  color: var(--mht-text-secondary);
  border: 1px solid var(--mht-border-base);
}
.mht-diagnose-btn.partial:hover {
  border-color: var(--mht-primary);
  color: var(--mht-primary);
}
.mht-diagnose-btn.ready {
  background: var(--mht-primary);
  color: var(--mht-text-inverse);
  border: 1px solid var(--mht-primary);
}
.mht-diagnose-btn.ready:hover { background: var(--mht-primary-dark); border-color: var(--mht-primary-dark); }

.mht-reset-btn {
  padding: 11px 18px;
  background: var(--mht-bg-base);
  color: var(--mht-text-secondary);
  border: 1px solid var(--mht-border-base);
  border-radius: var(--mht-radius);
  font-size: 0.85rem;
  font-family: var(--mht-font);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.mht-reset-btn:hover { border-color: var(--mht-text-secondary); color: var(--mht-text-primary); }

/* ===================================================
   Result
=================================================== */
.mht-result {
  background: var(--mht-bg-base);
  border: 1px solid var(--mht-border-base);
  border-top: 3px solid var(--mht-primary);
  border-radius: var(--mht-radius);
  padding: 1.5rem 1.25rem;
  animation: mht-fadein 0.3s ease;
}
@keyframes mht-fadein {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.mht-result-label {
  font-size: 0.78rem;
  color: var(--mht-text-muted);
  text-align: center;
  letter-spacing: 0.05em;
  margin: 0 0 4px;
}
.mht-result-age {
  font-size: 2rem;
  font-weight: 600;
  color: var(--mht-primary-dark);
  text-align: center;
  margin-bottom: 8px;
}
.mht-result-comment {
  font-size: 0.87rem;
  color: var(--mht-text-primary);
  line-height: 1.9;
  text-align: center;
  margin: 0 0 16px;
}
.mht-result-detail-wrap {
  background: var(--mht-bg-subtle);
  border: 1px solid var(--mht-border-light);
  border-radius: var(--mht-radius);
  padding: 10px 14px;
  margin-bottom: 10px;
}
.mht-detail-title {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--mht-text-muted);
  margin: 0 0 6px;
  letter-spacing: 0.05em;
}
.mht-result-detail .mht-detail-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--mht-text-secondary);
  padding: 3px 0;
}
.mht-detail-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.mht-detail-dot.heard   { background: var(--mht-primary); }
.mht-detail-dot.unheard { background: var(--mht-border-base); }
.mht-detail-dot.skipped { background: var(--mht-dot-skipped); }
.mht-result-note {
  font-size: 0.72rem;
  color: var(--mht-text-muted);
  text-align: center;
  line-height: 1.6;
  margin: 0;
}

/* ===================================================
   Responsive
=================================================== */
@media (max-width: 500px) {
  .mht-grid { grid-template-columns: repeat(2, 1fr); }
  .mht-actions { flex-direction: column; }
}