/* ==========================================================================
   Application Stylesheet - Pitch Trainer (Notion Design System)
   ========================================================================== */

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

html, body {
  height: 100%;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-canvas-soft);
  color: var(--color-ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Typography Hierarchy (from Notion.md)
   ========================================================================== */

.type-display-1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
}

.type-heading-1 {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
}

.type-heading-2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
}

.type-heading-3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.25px;
}

.type-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.125px;
}

.type-body-md {
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
}

.type-body-sm {
  font-size: 13px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-ink-muted);
}

.type-caption {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-ink-faint);
}

.type-eyebrow {
  font-size: 11px;
  font-weight: 600;
  line-height: 1.33;
  letter-spacing: 0.125px;
  text-transform: uppercase;
}

/* ==========================================================================
   Buttons (Notion Specs)
   ========================================================================== */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  user-select: none;
  text-decoration: none;
}

.btn-primary:hover {
  background-color: #0068c7;
}

.btn-primary:active {
  background-color: var(--color-primary-active);
  transform: scale(0.98);
}

.btn-primary:disabled {
  background-color: var(--color-hairline);
  color: var(--color-ink-faint);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-hairline);
  box-shadow: var(--shadow-level-1);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  user-select: none;
}

.btn-secondary:hover {
  background-color: var(--color-canvas-soft);
  border-color: #d8d8d8;
}

.btn-secondary:active {
  transform: scale(0.98);
}

.btn-utility {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background-color: var(--color-surface);
  color: var(--color-ink-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-hairline);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

.btn-utility:hover {
  background-color: var(--color-canvas-soft);
  color: var(--color-ink);
}

.btn-utility:active {
  background-color: #ebeae8;
}

.btn-give-up {
  color: var(--color-ink-muted);
  border-color: var(--color-hairline);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-give-up:hover {
  color: var(--color-accent-orange);
  border-color: rgba(221, 91, 0, 0.35);
  background-color: #fff9f5;
}

.btn-give-up:active {
  background-color: #ffede0;
  transform: scale(0.98);
}

.btn-history {
  color: var(--color-primary);
  border-color: rgba(0, 117, 222, 0.28);
  background-color: rgba(0, 117, 222, 0.04);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn-history:hover {
  background-color: rgba(0, 117, 222, 0.1);
  border-color: var(--color-primary);
}

.btn-history:active {
  transform: scale(0.98);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-ink-secondary);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.btn-icon:hover {
  background-color: rgba(0, 0, 0, 0.04);
  color: var(--color-ink);
}

/* ==========================================================================
   Badges
   ========================================================================== */

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background-color: var(--color-surface);
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.125px;
  border-radius: var(--radius-full);
  padding: 3px 8px;
  border: 1px solid var(--color-hairline);
  white-space: nowrap;
}

.badge-pill.purple {
  color: #552783;
  background-color: rgba(214, 182, 246, 0.35);
  border-color: rgba(214, 182, 246, 0.6);
}

.badge-pill.teal {
  color: #1b6865;
  background-color: rgba(42, 157, 153, 0.12);
  border-color: rgba(42, 157, 153, 0.3);
}

.badge-pill.blue {
  color: #005bab;
  background-color: rgba(0, 117, 222, 0.12);
  border-color: rgba(0, 117, 222, 0.3);
}

/* ==========================================================================
   Full-Width Site Header (幅100%、背景は白)
   ========================================================================== */

.site-header {
  width: 100%;
  background-color: #ffffff;
  border-bottom: 1px solid var(--color-hairline);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.header-inner {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.header-brand-icon {
  width: 34px;
  height: 34px;
  background: var(--color-ink);
  color: #ffffff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.12);
}

.header-brand-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.25;
}

.header-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.3px;
  margin: 0;
}

.header-version-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background-color: var(--color-canvas-soft);
  color: var(--color-ink-secondary);
  border: 1px solid var(--color-hairline);
  letter-spacing: 0.2px;
}

.header-subtitle {
  font-size: 11px;
  color: var(--color-ink-muted);
  margin-top: 1px;
}

.header-subtitle a {
  color: var(--color-ink-muted);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.header-subtitle a:hover {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.header-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-hairline);
  background: #ffffff;
  color: var(--color-ink-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.header-action-btn:hover {
  background-color: var(--color-canvas-soft);
  color: var(--color-ink);
  border-color: #d0d7de;
}

/* ==========================================================================
   Centered Main Layout (広すぎず狭すぎない幅)
   ========================================================================== */

.main-layout-container {
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding: 18px 16px 10px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

/* 1段目: 今の設定バー */
.current-settings-bar {
  background-color: #ffffff;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: 10px 14px;
  box-shadow: var(--shadow-level-1);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.current-settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.current-settings-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-ink-faint);
  display: flex;
  align-items: center;
  gap: 5px;
}

.btn-text-link {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: var(--radius-xs);
  transition: background-color var(--transition-fast);
}

.btn-text-link:hover {
  background-color: rgba(0, 117, 222, 0.08);
  text-decoration: underline;
}

.current-settings-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

/* 2段目: 成績データをAIに聞くセクション */
.ai-advisor-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all var(--transition-normal);
}

.ai-trigger-container {
  display: flex;
  justify-content: center;
}

.btn-ask-ai {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #0075de 0%, #1e40af 100%);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-lg);
  padding: 11px 24px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 117, 222, 0.28);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
}

.btn-ask-ai:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 117, 222, 0.38);
}

.btn-ask-ai:active {
  transform: translateY(0);
}

/* クリップボード展開エリア */
.ai-clipboard-area {
  background-color: #ffffff;
  border: 1px solid rgba(0, 117, 222, 0.28);
  border-radius: var(--radius-xl);
  padding: 16px 18px;
  box-shadow: var(--shadow-level-2);
  display: flex;
  flex-direction: column;
  gap: 14px;
  animation: slideFadeDown 0.25s ease-out;
}

@keyframes slideFadeDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ai-copied-banner {
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
  padding: 10px 14px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.ai-copied-icon {
  font-size: 22px;
  line-height: 1;
  flex-shrink: 0;
}

.ai-copied-text strong {
  font-size: 13px;
  color: #166534;
  display: block;
  margin-bottom: 2px;
}

.ai-copied-text p {
  font-size: 12px;
  color: #15803d;
  line-height: 1.45;
  margin: 0;
}

.ai-links-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.ai-service-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.ai-service-icon {
  font-size: 14px;
}

.ai-service-arrow {
  font-size: 11px;
  opacity: 0.6;
}

.gemini-btn {
  background-color: #f4f6ff;
  color: #1a429a;
  border-color: #d1dcfa;
}
.gemini-btn:hover {
  background-color: #e9edff;
  border-color: #a8bff8;
  transform: translateY(-1px);
}

.chatgpt-btn {
  background-color: #f4faf6;
  color: #117b4c;
  border-color: #c0ebd2;
}
.chatgpt-btn:hover {
  background-color: #e5f6ec;
  border-color: #92e0b2;
  transform: translateY(-1px);
}

.claude-btn {
  background-color: #faf4ed;
  color: #9c4b18;
  border-color: #f2d8c5;
}
.claude-btn:hover {
  background-color: #f5ebe0;
  border-color: #e8bea0;
  transform: translateY(-1px);
}

.ai-amazon-banner-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90px;
  border-radius: var(--radius-md);
  background: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  overflow: hidden;
}

.ai-amazon-iframe {
  width: 100%;
  height: 90px;
  border: none;
  overflow: hidden;
}

.ai-area-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 4px;
  border-top: 1px solid var(--color-hairline-subtle);
  gap: 8px;
}

.btn-clear-ai {
  background-color: #fff1f2;
  color: #be123c;
  border: 1px solid #fecdd3;
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all var(--transition-fast);
}

.btn-clear-ai:hover {
  background-color: #ffe4e6;
  border-color: #fda4af;
}

.btn-target-listen {
  color: var(--color-primary);
  border-color: rgba(0, 117, 222, 0.3);
}

/* Backward compatibility wrapper */
.app-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* ==========================================================================
   Cards (Feature Card, Notion Style)
   ========================================================================== */

.notion-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-level-1);
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.notion-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-hairline-subtle);
  flex-wrap: wrap;
  gap: 8px;
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   Question / Reference Note Area
   ========================================================================== */

.question-stage {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  flex: 1;
  justify-content: space-between;
  position: relative;
}

.reference-display {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: 10px 16px;
  gap: 8px;
}

.reference-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.reference-note-name {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.reference-note-name .solfege {
  font-size: 14px;
  color: var(--color-ink-muted);
  font-weight: 500;
}

.direction-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-hairline);
}

.direction-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 15px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.direction-badge.up {
  color: #005bab;
  background: rgba(0, 117, 222, 0.12);
  border: 1px solid rgba(0, 117, 222, 0.3);
}

.direction-badge.down {
  color: #793400;
  background: rgba(221, 91, 0, 0.12);
  border: 1px solid rgba(221, 91, 0, 0.3);
}

.direction-badge.unison {
  color: #552783;
  background: rgba(214, 182, 246, 0.25);
  border: 1px solid rgba(214, 182, 246, 0.5);
}

.target-goal-box {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.target-goal-label {
  font-size: 11px;
  color: var(--color-ink-faint);
  font-weight: 600;
  text-transform: uppercase;
}

.target-goal-note {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
}

/* ==========================================================================
   Realtime Pitch Meter (Tuner)
   ========================================================================== */

.meter-wrapper {
  margin: var(--space-sm) 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pitch-meter-container {
  position: relative;
  background: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  height: 72px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Meter Ticks */
.meter-ticks {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 0 16px 8px;
  pointer-events: none;
}

.tick {
  width: 1px;
  background-color: #d0cecb;
  height: 10px;
}

.tick.major {
  height: 16px;
  background-color: var(--color-ink-muted);
}

.tick.center {
  height: 26px;
  width: 2px;
  background-color: var(--color-ink-secondary);
}

.tick-label {
  position: absolute;
  bottom: 8px;
  font-size: 10px;
  color: var(--color-ink-faint);
  font-variant-numeric: tabular-nums;
  transform: translateX(-50%);
}

/* Tolerance Target Zone */
.tolerance-zone {
  position: absolute;
  top: 6px;
  bottom: 6px;
  background: rgba(26, 174, 57, 0.12);
  border: 1px dashed rgba(26, 174, 57, 0.4);
  border-radius: var(--radius-sm);
  transition: left 0.15s ease, width 0.15s ease;
  pointer-events: none;
  z-index: 1;
}

/* Moving Needle */
.meter-needle {
  position: absolute;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background-color: var(--color-ink);
  border-radius: var(--radius-full);
  transform: translateX(-50%);
  transition: background-color var(--transition-fast);
  z-index: 2;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  left: 50%;
}

.meter-needle::after {
  content: '';
  position: absolute;
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background-color: inherit;
  border-radius: 50%;
}

.meter-needle.in-tune {
  background-color: var(--color-accent-green);
  box-shadow: 0 0 8px rgba(26, 174, 57, 0.6);
}

.meter-needle.off-tune {
  background-color: var(--color-accent-orange);
}

/* Live Pitch Stats */
.live-pitch-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: 6px 12px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.stat-label {
  font-size: 11px;
  color: var(--color-ink-muted);
}

.stat-value {
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat-value.cents-value {
  color: var(--color-ink);
}

.stat-value.cents-value.in-tune {
  color: var(--color-accent-green);
}

.stat-value.cents-value.off-tune {
  color: var(--color-accent-orange);
}

/* ==========================================================================
   3 Seconds Hold Progress
   ========================================================================= */

.hold-progress-box {
  margin: 4px 0;
  background: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: 8px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hold-progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hold-status-text {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-ink-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hold-timer-text {
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}

.progress-track {
  height: 8px;
  background: #e9e8e6;
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--color-accent-green);
  border-radius: var(--radius-full);
  transition: width 0.08s linear, background-color var(--transition-fast);
}

.progress-fill.active {
  background: linear-gradient(90deg, #2a9d99, #1aae39);
}

/* ==========================================================================
   Score / Success Card
   ========================================================================== */

.result-card {
  position: absolute;
  inset: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.98);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 2px solid var(--color-accent-green);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 12px;
  animation: fadeIn 0.25s ease-out;
}

.result-card.hidden {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.result-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(26, 174, 57, 0.12);
  color: var(--color-accent-green);
  border-radius: 50%;
  font-size: 22px;
}

.result-scores {
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 4px 0;
}

.score-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.score-num {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--color-ink);
  line-height: 1.1;
}

.score-grade {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
}

.result-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ==========================================================================
   Control Bar
   ========================================================================== */

.control-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: nowrap;
  margin-top: 4px;
}

/* ==========================================================================
   Modal Dialog (Notion Clean Style)
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.modal-content {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-level-2);
  width: 92%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px;
  transform: translateY(12px) scale(0.98);
  transition: transform var(--transition-normal);
}

.modal-backdrop.open .modal-content {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-hairline);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink-secondary);
}

.form-select, .form-range {
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: inherit;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid #d0cecb;
  outline: none;
}

.form-range {
  padding: 3px 0;
  cursor: pointer;
}

.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 117, 222, 0.2);
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
}

.history-textarea {
  width: 100%;
  background: var(--color-canvas-soft);
  color: var(--color-ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  line-height: 1.5;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid #d0cecb;
  outline: none;
  resize: vertical;
  white-space: pre;
  overflow-x: auto;
}

.history-textarea:focus {
  border-color: var(--color-primary);
  background: var(--color-surface);
}

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

.text-muted {
  color: var(--color-ink-muted);
}

/* Audio Waveform Canvas */
.mic-canvas {
  width: 110px;
  height: 32px;
  background: var(--color-canvas-soft);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-hairline-subtle);
  display: block;
}

/* ==========================================================================
   Full-Width Site Footer (幅100%、背景は白、1行表示)
   ========================================================================== */

.site-footer {
  width: 100%;
  background-color: #ffffff;
  border-top: 1px solid var(--color-hairline);
  padding: 14px 16px;
  margin-top: auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.site-footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-ink-muted);
  white-space: nowrap;
  flex-wrap: nowrap;
}

.footer-app-name {
  font-weight: 600;
  color: var(--color-ink);
}

.footer-version-tag {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  color: var(--color-ink-muted);
}

.footer-dash {
  color: var(--color-ink-faint);
}

.footer-producer {
  color: var(--color-ink-muted);
}

.footer-producer a {
  color: inherit;
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.footer-producer a:hover {
  color: var(--color-primary);
}

/* Amazon Random Banner (フッターの上に横長のAmazonバナーを配置) */
.amazon-banner-section {
  width: 100%;
  max-width: 780px;
  margin: 6px auto 4px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90px;
}

/* ==========================================================================
   Help Modal Styles
   ========================================================================== */

.help-modal-content {
  max-width: 560px;
}

.help-modal-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 65vh;
  overflow-y: auto;
  padding-right: 4px;
}

.help-step-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px 12px;
  background-color: var(--color-canvas-soft);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-hairline-subtle);
}

.help-step-number {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.help-step-content h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 2px;
}

.help-step-content p {
  font-size: 12px;
  color: var(--color-ink-muted);
  line-height: 1.45;
  margin: 0;
}

/* ==========================================================================
   Mobile-Specific Layout (Responsive with smooth scrolling)
   ========================================================================== */

@media (max-width: 640px) {
  html, body {
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100%;
    min-height: 100dvh;
    height: auto;
  }

  .header-inner {
    padding: 8px 12px;
    gap: 8px;
  }

  .header-brand-icon {
    width: 28px;
    height: 28px;
  }

  .header-brand-icon svg {
    width: 15px;
    height: 15px;
  }

  .header-title {
    font-size: 14px;
  }

  .header-version-badge {
    font-size: 9px;
    padding: 1px 5px;
  }

  .header-subtitle {
    font-size: 10px;
  }

  .header-action-btn {
    width: 32px;
    height: 32px;
    padding: 0;
  }

  .header-action-btn svg {
    width: 16px;
    height: 16px;
  }

  .main-layout-container {
    padding: 10px 10px 6px;
    gap: 10px;
  }

  .current-settings-bar {
    padding: 8px 10px;
  }

  .current-settings-badges .badge-pill {
    font-size: 10px;
    padding: 2px 6px;
  }

  #badge-direction,
  #badge-octave {
    display: none; /* Hide minor badges on small screen to avoid wrap clutter */
  }

  .btn-ask-ai {
    width: 100%;
    padding: 10px 16px;
    font-size: 13px;
  }

  .ai-clipboard-area {
    padding: 12px 14px;
    gap: 10px;
  }

  .ai-copied-banner {
    padding: 8px 10px;
    gap: 8px;
  }

  .ai-copied-icon {
    font-size: 18px;
  }

  .ai-links-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .ai-service-link {
    padding: 8px 12px;
    font-size: 12px;
  }

  .notion-card {
    padding: 10px 12px;
    border-radius: var(--radius-lg);
  }

  .notion-card-header {
    margin-bottom: 6px;
    padding-bottom: 4px;
  }

  .card-title-group .type-title {
    font-size: 13px;
  }

  .card-title-group .type-caption {
    display: none;
  }

  .card-header-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    width: 100%;
  }

  .card-header-actions .btn-utility {
    font-size: 11px;
    padding: 4px 8px;
  }

  .reference-display {
    padding: 6px 10px;
  }

  .reference-note-name {
    font-size: 20px;
  }

  .reference-note-name .solfege {
    font-size: 12px;
  }

  .direction-indicator {
    padding: 3px 8px;
    gap: 4px;
  }

  .direction-badge {
    font-size: 13px;
    padding: 2px 8px;
  }

  .target-goal-note {
    font-size: 17px;
  }

  .meter-wrapper {
    margin: 4px 0;
    gap: 4px;
  }

  .pitch-meter-container {
    height: 52px;
  }

  .tick.major {
    height: 12px;
  }

  .tick.center {
    height: 20px;
  }

  .tick-label {
    font-size: 9px;
    bottom: 4px;
  }

  .live-pitch-stats {
    padding: 4px 6px;
    gap: 4px;
  }

  .stat-label {
    font-size: 10px;
  }

  .stat-value {
    font-size: 15px;
  }

  .hold-progress-box {
    padding: 6px 10px;
    margin: 2px 0;
    gap: 2px;
  }

  .hold-status-text {
    font-size: 11px;
  }

  .hold-timer-text {
    font-size: 12px;
  }

  .progress-track {
    height: 6px;
  }

  .control-bar {
    margin-top: 2px;
  }

  #btn-toggle-mic {
    font-size: 12px;
    padding: 6px 12px;
  }

  #mic-status-text {
    font-size: 10px;
  }

  .mic-canvas {
    width: 80px;
    height: 26px;
  }

  .amazon-banner-section {
    margin-top: 10px;
    margin-bottom: 4px;
  }

  .site-footer {
    padding: 10px 10px;
  }

  .site-footer-inner {
    font-size: 11px;
    gap: 4px;
  }

  /* Result card inside notion-card on mobile */
  .result-card {
    padding: 10px;
    gap: 8px;
  }

  .result-card .type-heading-2 {
    font-size: 16px;
  }

  .result-badge {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .score-num, .score-grade {
    font-size: 26px;
  }

  .result-card .type-body-md {
    font-size: 13px;
  }

  .result-actions button {
    font-size: 13px;
    padding: 8px 18px !important;
  }
}