/* ==========================================================================
   TextMetrics Pro - Design System & Modern Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables & Color Palettes
   -------------------------------------------------------------------------- */
:root {
  /* Font Families */
  --font-sans: 'Plus Jakarta Sans', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions */
  --trans-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --trans-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --trans-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
}

/* Dark Theme (Default) */
[data-theme="dark"] {
  --bg-app: #0b0f19;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-solid: #111827;
  --bg-card-hover: rgba(31, 41, 55, 0.6);
  --bg-input: rgba(15, 23, 42, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(255, 255, 255, 0.16);

  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-emerald: #10b981;
  --accent-violet: #8b5cf6;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;

  --glow-1: rgba(99, 102, 241, 0.15);
  --glow-2: rgba(168, 85, 247, 0.12);

  --hero-primary-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.22) 0%, rgba(139, 92, 246, 0.12) 100%);
  --hero-primary-border: rgba(99, 102, 241, 0.35);

  --hero-emerald-bg: linear-gradient(135deg, rgba(16, 185, 129, 0.22) 0%, rgba(5, 150, 105, 0.12) 100%);
  --hero-emerald-border: rgba(16, 185, 129, 0.35);

  --dropdown-bg: #131c2e;
  --dropdown-hover: #1e293b;
}

/* Light Theme */
[data-theme="light"] {
  --bg-app: #f4f6fb;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-solid: #ffffff;
  --bg-card-hover: rgba(248, 250, 252, 0.9);
  --bg-input: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(0, 0, 0, 0.16);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;

  --accent-primary: #4f46e5;
  --accent-primary-hover: #4338ca;
  --accent-emerald: #059669;
  --accent-violet: #7c3aed;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;
  --accent-blue: #2563eb;
  --accent-cyan: #0891b2;

  --glow-1: rgba(99, 102, 241, 0.1);
  --glow-2: rgba(236, 72, 153, 0.08);

  --hero-primary-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.06) 100%);
  --hero-primary-border: rgba(99, 102, 241, 0.25);

  --hero-emerald-bg: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(5, 150, 105, 0.06) 100%);
  --hero-emerald-border: rgba(16, 185, 129, 0.25);

  --dropdown-bg: #ffffff;
  --dropdown-hover: #f1f5f9;
}

/* --------------------------------------------------------------------------
   Global Resets & Base
   -------------------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
  transition: background-color var(--trans-base), color var(--trans-base);
  -webkit-font-smoothing: antialiased;
}

/* Background Ambient Glows */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
  transition: all var(--trans-base);
}

.bg-glow-1 {
  top: -100px;
  right: -50px;
  width: 500px;
  height: 500px;
  background: var(--glow-1);
}

.bg-glow-2 {
  bottom: -150px;
  left: -50px;
  width: 600px;
  height: 600px;
  background: var(--glow-2);
}

/* Main Container */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* --------------------------------------------------------------------------
   App Header
   -------------------------------------------------------------------------- */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-violet));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
  flex-shrink: 0;
}

.brand-title {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.2;
}

.badge-pro {
  font-size: 0.65rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ec4899, #8b5cf6);
  color: white;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}

.brand-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Target Input Control */
.target-control {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px 10px;
  gap: 6px;
  backdrop-filter: blur(8px);
  transition: border-color var(--trans-fast);
}

.target-control:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.target-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}

.target-input {
  width: 75px;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: right;
  outline: none;
}

.target-input::-webkit-inner-spin-button,
.target-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.target-unit {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Icon Buttons */
.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--trans-fast);
  backdrop-filter: blur(8px);
}

.icon-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-1px);
}

/* Theme Icon Visibility */
[data-theme="dark"] .sun-icon {
  display: block;
}

[data-theme="dark"] .moon-icon {
  display: none;
}

[data-theme="light"] .sun-icon {
  display: none;
}

[data-theme="light"] .moon-icon {
  display: block;
}

/* --------------------------------------------------------------------------
   Target Progress Bar
   -------------------------------------------------------------------------- */
.target-progress-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  margin-bottom: 20px;
  backdrop-filter: blur(12px);
  animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.target-progress-container.hidden {
  display: none;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.85rem;
}

.progress-label {
  font-weight: 600;
  color: var(--text-main);
}

.progress-diff {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.progress-track {
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}

[data-theme="light"] .progress-track {
  background: rgba(0, 0, 0, 0.06);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-emerald));
  border-radius: var(--radius-full);
  transition: width var(--trans-base);
}

/* --------------------------------------------------------------------------
   Main Layout: 2 Columns (Editor + Analytics)
   -------------------------------------------------------------------------- */
.main-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  flex: 1;
  align-items: start;
}

/* --------------------------------------------------------------------------
   Editor Section (Left Column)
   -------------------------------------------------------------------------- */
.editor-section {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.editor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  height: 100%;
  min-height: 560px;
  transition: border-color var(--trans-fast);
}

.editor-card:focus-within {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(99, 102, 241, 0.2);
}

/* Toolbar */
.editor-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  background: rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 10px;
}

[data-theme="light"] .editor-toolbar {
  background: rgba(0, 0, 0, 0.02);
}

.editor-status {
  font-size: 0.8rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 6px var(--accent-emerald);
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

/* Toolbar Buttons */
.toolbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: var(--bg-card-solid);
  color: var(--text-main);
  transition: all var(--trans-fast);
  white-space: nowrap;
}

.toolbar-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
  transform: translateY(-1px);
}

.toolbar-btn.primary {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.toolbar-btn.primary:hover {
  background: var(--accent-primary-hover);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.35);
}

.toolbar-btn.danger {
  color: var(--accent-rose);
}

.toolbar-btn.danger:hover {
  background: rgba(244, 63, 94, 0.1);
  border-color: rgba(244, 63, 94, 0.3);
}

/* Dropdown Menu */
.dropdown-wrapper {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 270px;
  background: var(--dropdown-bg);
  border: 1px solid var(--border-color-hover);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 100;
  backdrop-filter: blur(20px);
  animation: fadeInDown 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.dropdown-menu.hidden {
  display: none;
}

.dropdown-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
  padding: 9px 12px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  transition: background-color var(--trans-fast);
}

.dropdown-item:hover {
  background: var(--dropdown-hover);
}

.item-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.item-desc {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 2px;
}

/* Textarea */
.textarea-wrapper {
  flex: 1;
  display: flex;
  padding: 16px 20px;
}

.main-textarea {
  width: 100%;
  height: 100%;
  min-height: 440px;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1.02rem;
  line-height: 1.75;
  resize: vertical;
  outline: none;
}

.main-textarea::placeholder {
  color: var(--text-dim);
  opacity: 0.8;
}

/* Editor Footer */
.editor-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background: rgba(0, 0, 0, 0.05);
  border-top: 1px solid var(--border-color);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.footer-shortcuts {
  display: flex;
  gap: 8px;
}

.shortcut-tag kbd {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.7rem;
}

[data-theme="light"] .shortcut-tag kbd {
  background: rgba(0, 0, 0, 0.05);
}

/* --------------------------------------------------------------------------
   Analytics Section (Right Column)
   -------------------------------------------------------------------------- */
.analytics-section {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Hero Cards Grid */
.stats-hero-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
  transition: all var(--trans-base);
  position: relative;
  overflow: hidden;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-md);
}

.hero-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 20px;
}

.hero-card.primary-gradient {
  background: var(--hero-primary-bg);
  border-color: var(--hero-primary-border);
}

.hero-card.emerald-gradient {
  background: var(--hero-emerald-bg);
  border-color: var(--hero-emerald-border);
}

.hero-card .card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.primary-gradient .card-icon {
  background: rgba(99, 102, 241, 0.2);
  color: var(--accent-primary);
}

.emerald-gradient .card-icon {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
}

.stat-content {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge-sub {
  font-size: 0.7rem;
  font-weight: 500;
  opacity: 0.75;
}

.stat-value-group {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-top: 4px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-main);
  transition: transform var(--trans-fast);
}

.stat-value.lg {
  font-size: 1.85rem;
}

.stat-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Secondary Grid (4 Cards: Manuscript, Read Time, Lines, Words) */
.stats-secondary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.card-header-compact {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-mini-icon {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-mini-icon.violet {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-violet);
}

.card-mini-icon.amber {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
}

.card-mini-icon.blue {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
}

.card-mini-icon.rose {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
}

.card-mini-icon.cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
}

.card-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

.card-badge {
  font-size: 0.7rem;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-dim);
  margin-left: auto;
}

[data-theme="light"] .card-badge {
  background: rgba(0, 0, 0, 0.05);
}

.mt-2 {
  margin-top: 10px;
}

.stat-detail {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-sans);
}

/* Breakdown Card */
.breakdown-card {
  padding: 20px;
}

.breakdown-bar-track {
  width: 100%;
  height: 12px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  margin: 16px 0 14px 0;
  display: flex;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .breakdown-bar-track {
  background: rgba(0, 0, 0, 0.05);
}

.bar-segment {
  height: 100%;
  transition: width var(--trans-base);
}

.bar-segment.hiragana {
  background-color: #6366f1;
}

.bar-segment.katakana {
  background-color: #06b6d4;
}

.bar-segment.kanji {
  background-color: #10b981;
}

.bar-segment.latin {
  background-color: #f59e0b;
}

.bar-segment.other {
  background-color: #94a3b8;
}

.breakdown-legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 10px;
  font-size: 0.78rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.legend-indicator {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-indicator.hiragana {
  background-color: #6366f1;
}

.legend-indicator.katakana {
  background-color: #06b6d4;
}

.legend-indicator.kanji {
  background-color: #10b981;
}

.legend-indicator.latin {
  background-color: #f59e0b;
}

.legend-indicator.other {
  background-color: #94a3b8;
}

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

.legend-count {
  color: var(--text-main);
  font-family: var(--font-mono);
  font-weight: 600;
  margin-left: auto;
}

/* --------------------------------------------------------------------------
   App Footer
   -------------------------------------------------------------------------- */
.app-footer {
  margin-top: 32px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding: 16px 0;
  border-top: 1px solid var(--border-color);
}

/* --------------------------------------------------------------------------
   Toast Notification
   -------------------------------------------------------------------------- */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: var(--bg-card-solid);
  color: var(--text-main);
  border: 1px solid var(--accent-emerald);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 0 15px rgba(16, 185, 129, 0.2);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1000;
  font-size: 0.88rem;
  font-weight: 600;
  transition: all var(--trans-spring);
  backdrop-filter: blur(16px);
}

.toast.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(20px);
}

.toast-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-emerald);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   Responsive Layout
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .main-layout {
    grid-template-columns: 1fr;
  }

  .editor-card {
    min-height: 400px;
  }
}

@media (max-width: 680px) {
  .app-container {
    padding: 16px;
  }

  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .stats-hero-grid,
  .stats-secondary-grid {
    grid-template-columns: 1fr;
  }

  .editor-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-actions {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .stat-value {
    font-size: 1.8rem;
  }

  .breakdown-legend {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Header Guide & Sponsor Buttons
   -------------------------------------------------------------------------- */
.header-guide-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 13px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trans-fast);
}

.header-guide-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.header-sponsor-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 13px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(244, 63, 94, 0.3);
  background: rgba(244, 63, 94, 0.12);
  color: #fb7185;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trans-fast);
}

.header-sponsor-btn:hover {
  background: rgba(244, 63, 94, 0.22);
  border-color: rgba(244, 63, 94, 0.5);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Footer Nav & Links
   -------------------------------------------------------------------------- */
.app-footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.app-footer-nav a,
.footer-link-btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.82rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--trans-fast);
}

.app-footer-nav a:hover,
.footer-link-btn:hover {
  color: var(--accent-primary);
}

/* --------------------------------------------------------------------------
   Ad Container & Mock
   -------------------------------------------------------------------------- */
.ad-container {
  margin: 32px auto 8px;
  max-width: 900px;
  width: 100%;
  text-align: center;
}

.ad-label {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 6px;
  opacity: 0.7;
}

.ad-slot {
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(12px);
  transition: all var(--trans-fast);
}

.ad-slot:hover {
  border-color: var(--border-color-hover);
}

.ad-mock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-dim);
}

.ad-mock-icon {
  font-size: 1.5rem;
  opacity: 0.8;
}

.ad-mock-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.ad-mock-title {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-muted);
}

.ad-mock-desc {
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* --------------------------------------------------------------------------
   Modal Window
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: opacity var(--trans-base);
}

.modal-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-card {
  width: 100%;
  max-width: 540px;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  backdrop-filter: blur(24px);
  animation: modalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
  from {
    transform: scale(0.95);
    opacity: 0;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-dim);
  cursor: pointer;
  line-height: 1;
}

.modal-close-btn:hover {
  color: var(--text-main);
}

.modal-content {
  padding: 22px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-content h4 {
  color: var(--text-main);
  margin: 16px 0 6px;
  font-size: 0.95rem;
}

.modal-content h4:first-child {
  margin-top: 0;
}

.modal-content ul {
  padding-left: 20px;
  margin-bottom: 12px;
}

.modal-content li {
  margin-bottom: 6px;
}

/* Support Card Styles inside Modal */
.support-card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  margin: 16px 0;
}

[data-theme="light"] .support-card {
  background: rgba(0, 0, 0, 0.03);
}

.paypay-card {
  border-color: rgba(235, 52, 70, 0.35);
  background: rgba(235, 52, 70, 0.06);
}

.support-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.support-badge.paypay {
  background: #ff0033;
  color: #ffffff;
  font-weight: 700;
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
}

.support-note {
  font-size: 0.72rem;
  color: var(--text-dim);
}

.support-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.copy-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.copy-label {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.copy-value {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.95rem;
  flex: 1;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trans-fast);
}

.copy-btn:hover {
  background: var(--accent-primary-hover);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.support-platform-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--trans-fast);
}

.support-platform-btn:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
}

.support-platform-btn.bmc:hover {
  color: #f59e0b;
  border-color: #f59e0b;
}

.support-platform-btn.kofi:hover {
  color: #ef4444;
  border-color: #ef4444;
}

.support-platform-btn.amazon:hover {
  color: #f97316;
  border-color: #f97316;
}

/* X (Twitter) 応援ボタン */
.support-x-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  background: #0f1419;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: all var(--trans-fast);
}

.support-x-btn:hover {
  background: #1a232c;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
  color: #ffffff;
}

/* 準備中の支援ボタン */
.support-platform-btn.disabled,
.support-platform-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed !important;
  pointer-events: none !important;
  background: rgba(148, 163, 184, 0.08) !important;
  border-color: var(--border-color) !important;
  color: var(--text-dim) !important;
  transform: none !important;
  box-shadow: none !important;
}

.status-tag {
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(148, 163, 184, 0.2);
  color: var(--text-dim);
  font-weight: 500;
  margin-left: 4px;
}

/* ==========================================
   TextMetrics PRO：スマホ表示ヘッダー綺麗化修正
   ========================================== */
@media (max-width: 680px) {
  /* ヘッダー全体を「ロゴ（上）」と「操作ボタン（下）」に完全分離 */
  .app-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 12px !important;
  }

  /* ボタン・入力欄のグループを横いっぱいに広げて綺麗に並べる */
  .header-actions {
    width: 100% !important;
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    justify-content: flex-end !important;
    gap: 6px !important;
  }

  /* 「目標：なし字」の幅を小さくスマートに縮小 */
  .target-control {
    padding: 3px 8px !important;
  }

  .target-input {
    width: 45px !important; /* 入力欄をコンパクトに */
    font-size: 0.8rem !important;
  }

  .target-label,
  .target-unit {
    font-size: 0.75rem !important;
  }

  /* 各ボタンの余白と文字をキュッと引き締める */
  .header-guide-btn,
  .header-sponsor-btn {
    font-size: 0.75rem !important;
    padding: 5px 8px !important;
    white-space: nowrap !important;
  }

  /* アイコンボタン（戻る/X/テーマ切替）も少しだけ小さく調整 */
  .icon-btn {
    width: 36px !important;
    height: 36px !important;
  }
}