/* ============================================
   文字カウンタス - style.css
   ============================================ */

/* --- CSS Custom Properties --- */

[data-theme="light"] {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-border: #d4d4d4;
  --color-accent: #1e3a5f;
  --color-accent-hover: #152d4a;
  --color-input-bg: #ffffff;
  --color-input-border: #c4c4c4;
  --color-stat-bg: #f5f5f5;
  --color-stat-value: #1a1a1a;
  --color-btn-bg: #f0f0f0;
  --color-btn-hover: #e0e0e0;
  --color-btn-text: #1a1a1a;
  --color-header-bg: #ffffff;
  --color-focus-ring: #1e3a5f;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
  --color-bg: #0f0f0f;
  --color-surface: #1a1a1a;
  --color-text: #e5e5e5;
  --color-text-secondary: #a3a3a3;
  --color-border: #333333;
  --color-accent: #7baaf7;
  --color-accent-hover: #a3c4fa;
  --color-input-bg: #1a1a1a;
  --color-input-border: #404040;
  --color-stat-bg: #222222;
  --color-stat-value: #f5f5f5;
  --color-btn-bg: #2a2a2a;
  --color-btn-hover: #3a3a3a;
  --color-btn-text: #e5e5e5;
  --color-header-bg: #1a1a1a;
  --color-focus-ring: #7baaf7;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* --- Reset & Base --- */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family:
    "Hiragino Kaku Gothic ProN",
    "Hiragino Sans",
    "Noto Sans JP",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    -apple-system,
    sans-serif;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* --- Header --- */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background-color: var(--color-header-bg);
  border-bottom: 2px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 10;
}

header nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-accent);
}

#theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px;
  font-size: 1.25rem;
  background: var(--color-btn-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-btn-text);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

#theme-toggle:hover {
  background-color: var(--color-btn-hover);
}

#theme-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* --- Main Layout --- */

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 24px;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
}

/* --- Input Section --- */

.input-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#text-input {
  height: 200px;
  min-height: 200px;
  padding: 16px;
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: 8px;
  resize: vertical;
  overflow-y: auto;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#text-input::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.7;
}

#text-input:focus {
  outline: none;
  border-color: var(--color-focus-ring);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.15);
}

[data-theme="dark"] #text-input:focus {
  box-shadow: 0 0 0 3px rgba(123, 170, 247, 0.2);
}

/* --- Input Actions --- */

.input-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.input-actions button {
  min-width: 44px;
  min-height: 44px;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-btn-text);
  background-color: var(--color-btn-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.input-actions button:hover {
  background-color: var(--color-btn-hover);
}

.input-actions button:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.input-actions button:active {
  transform: scale(0.98);
}

/* --- Stats Panel --- */

.stats-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 12px;
  background-color: var(--color-stat-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.03em;
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

/* --- Responsive: Desktop (768px+) --- */

@media (min-width: 768px) {
  main {
    padding: 32px;
    gap: 32px;
  }

  header {
    padding: 16px 32px;
  }

  header h1 {
    font-size: 1.375rem;
  }

  #text-input {
    height: 320px;
    font-size: 1.05rem;
  }

  .stats-panel {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .stat-item {
    padding: 20px 16px;
  }

  .stat-value {
    font-size: 1.75rem;
  }
}

/* --- Responsive: Small mobile (< 400px) --- */

@media (max-width: 399px) {
  header {
    padding: 12px 16px;
  }

  main {
    padding: 16px;
    gap: 16px;
  }

  header h1 {
    font-size: 1.1rem;
  }

  .stats-panel {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .stat-item {
    padding: 12px 8px;
  }

  .stat-value {
    font-size: 1.25rem;
  }
}

/* --- Focus & Accessibility --- */

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* --- Smooth theme transition --- */

header,
#text-input,
.stat-item,
.input-actions button,
#theme-toggle {
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}


/* --- Visually Hidden (SEO + Accessibility) --- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Site Title Link --- */

.site-title {
  text-decoration: none;
  color: inherit;
}

.site-title:hover {
  opacity: 0.8;
}

.site-title h1 {
  margin: 0;
}

/* --- SEO Content Section --- */

.seo-content {
  margin-top: 16px;
  padding: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.seo-content h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.seo-content h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: 16px;
  margin-bottom: 8px;
}

.seo-content p {
  margin-bottom: 8px;
}

.seo-content ul {
  padding-left: 1.5em;
  margin-bottom: 8px;
}

.seo-content li {
  margin-bottom: 4px;
}

.seo-content strong {
  color: var(--color-text);
  font-weight: 600;
}

/* --- Footer --- */

footer {
  padding: 16px 24px;
  text-align: center;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  font-size: 0.8rem;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

/* --- Page Content (Privacy, Blog) --- */

.page-content {
  padding: 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  line-height: 1.9;
}

.page-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.page-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.page-content p {
  margin-bottom: 12px;
  color: var(--color-text-secondary);
}

.page-content ul,
.page-content ol {
  padding-left: 1.5em;
  margin-bottom: 12px;
  color: var(--color-text-secondary);
}

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

.page-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.page-content a:hover {
  color: var(--color-accent-hover);
}

.policy-date {
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* --- Info Table (Blog articles) --- */

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.9rem;
}

.info-table th,
.info-table td {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  text-align: left;
}

.info-table th {
  background-color: var(--color-stat-bg);
  font-weight: 600;
  color: var(--color-text);
}

.info-table td {
  color: var(--color-text-secondary);
}

/* --- Breadcrumb --- */

.breadcrumb {
  font-size: 0.85rem;
  margin-bottom: 16px;
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* --- Article Meta --- */

.article-meta {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

/* --- Blog List --- */

.blog-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 20px;
}

.blog-card {
  padding: 20px;
  background-color: var(--color-stat-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: box-shadow 0.15s ease;
}

.blog-card:hover {
  box-shadow: var(--shadow-md);
}

.blog-card h3 {
  font-size: 1rem;
  margin-top: 0;
  margin-bottom: 4px;
}

.blog-card h3 a {
  color: var(--color-accent);
  text-decoration: none;
}

.blog-card h3 a:hover {
  text-decoration: underline;
}

.blog-card p {
  margin-bottom: 4px;
  font-size: 0.9rem;
}

/* --- Nav Links --- */

.nav-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--color-accent);
}

@media (max-width: 399px) {
  .nav-links {
    gap: 10px;
  }
  .nav-links a {
    font-size: 0.8rem;
  }
}

/* --- Noscript --- */

noscript div {
  color: var(--color-text);
  background-color: var(--color-surface);
}

/* --- Stat Value Small --- */

.stat-value-sm {
  font-size: 1.25rem;
}

.stat-unit {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}

/* --- Character Limit Checker --- */

.char-limit-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.char-limit-section[data-active="false"] .limit-bar-track,
.char-limit-section[data-active="false"] .limit-text {
  opacity: 0;
  transition: opacity 0.2s ease;
}

.char-limit-section[data-active="true"] .limit-bar-track,
.char-limit-section[data-active="true"] .limit-text {
  opacity: 1;
  transition: opacity 0.2s ease;
}

.char-limit-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.char-limit-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

#limit-preset {
  padding: 8px 12px;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--color-text);
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

#limit-preset:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

#limit-custom {
  width: 100px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--color-text);
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  transition: border-color 0.15s ease;
}

#limit-custom:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.limit-bar-track {
  width: 100%;
  height: 6px;
  background-color: var(--color-stat-bg);
  border-radius: 3px;
  overflow: hidden;
}

.limit-bar {
  height: 100%;
  width: 0%;
  background-color: var(--color-accent);
  border-radius: 3px;
  transition: width 0.25s ease, background-color 0.2s ease;
}

.limit-bar.limit-warning {
  background-color: #e6a817;
}

.limit-bar.limit-over {
  background-color: #d94040;
  width: 100%;
}

.limit-text {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  min-height: 1.2em;
}

.limit-text-over {
  color: #d94040;
  font-weight: 600;
}

/* --- Detailed Statistics --- */

.detailed-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.detailed-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background-color: var(--color-stat-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
  align-self: flex-start;
}

.detailed-toggle:hover {
  background-color: var(--color-btn-hover);
  color: var(--color-text);
}

.detailed-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.toggle-icon {
  font-size: 0.7rem;
  transition: transform 0.2s ease;
}

.detailed-stats {
  animation: slideDown 0.2s ease;
}

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

.detailed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.detailed-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 10px;
  background-color: var(--color-stat-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.detailed-item-wide {
  grid-column: 1 / -1;
}

.detailed-item-wide .stat-value-sm {
  font-size: 1rem;
  letter-spacing: 0.05em;
}

/* --- Responsive adjustments for new sections --- */

@media (min-width: 768px) {
  .stat-value-sm {
    font-size: 1.375rem;
  }

  .detailed-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

@media (max-width: 399px) {
  .stat-value-sm {
    font-size: 1.1rem;
  }

  .char-limit-controls {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  #limit-preset {
    width: 100%;
  }

  #limit-custom {
    width: 100%;
  }

  .detailed-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
}