/* ===================================================
   パスワード強度チェック・生成ツール — style.css
   Primary: #0891b2 (Cyan / Security)
=================================================== */

:root {
  --primary: #0891b2;
  --primary-hover: #0e7490;
  --primary-rgb: 8, 145, 178;
  --primary-light: #e0f7fa;
  --bg: #f9f7f4;
  --surface: #ffffff;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --text-weak: #9ca3af;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.10), 0 1px 4px rgba(0,0,0,0.06);
  --transition: 0.15s ease;

  /* strength colors */
  --score-0: #ef4444;
  --score-1: #f97316;
  --score-2: #eab308;
  --score-3: #06b6d4;
  --score-4: #22c55e;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'BIZ UDPGothic', 'Hiragino Sans', 'Yu Gothic Medium', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  word-break: break-word;
}

/* ===== HEADER ===== */
header {
  background: linear-gradient(135deg, #0e7490 0%, #0891b2 60%, #06b6d4 100%);
  color: #fff;
  padding: 2rem 1.25rem 1.75rem;
  text-align: center;
}

.header-inner {
  max-width: 720px;
  margin: 0 auto;
}

.header-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.92;
}

header h1 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.3rem, 4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.header-sub {
  font-size: 0.9rem;
  opacity: 0.88;
  margin-top: 0.5rem;
}

/* ===== MAIN ===== */
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2.5rem;
}

/* ===== AD UNITS ===== */
.ad-unit {
  min-height: 0;
  background: #eef2f7;
  border: 1px dashed #cbd5e1;
  border-radius: var(--radius-sm);
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
  font-size: 0.75rem;
}

.ad-unit::before {
  content: "広告";
}

/* ===== PRIVACY NOTICE ===== */
.privacy-notice {
  background: var(--primary-light);
  border: 1px solid rgba(8, 145, 178, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
  color: #0e7490;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

/* ===== CARD ===== */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(0,0,0,0.05);
  margin-bottom: 1.25rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

.card h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h2 i {
  color: var(--primary);
}

/* ===== FIELD ===== */
.field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: 1rem;
}

.field-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
}

/* ===== PASSWORD INPUT ===== */
.password-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.password-input-wrapper input {
  width: 100%;
  padding: 0.625rem 3rem 0.625rem 0.875rem;
  font-size: 1rem;
  font-family: 'Outfit', monospace;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  min-height: 48px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.password-input-wrapper input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}

.toggle-visibility {
  position: absolute;
  right: 0.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.1rem;
  padding: 0.375rem;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.toggle-visibility:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.toggle-visibility:active {
  transform: scale(0.95);
}

/* ===== STRENGTH METER ===== */
.strength-meter-wrap {
  margin: 1rem 0 0.5rem;
}

.strength-meter {
  display: flex;
  gap: 4px;
  height: 8px;
  border-radius: 100px;
  overflow: hidden;
}

.strength-segment {
  flex: 1;
  background: #e2e8f0;
  border-radius: 100px;
  transition: background 0.25s ease;
}

/* strength levels */
.strength-segment.active-0 { background: var(--score-0); }
.strength-segment.active-1 { background: var(--score-1); }
.strength-segment.active-2 { background: var(--score-2); }
.strength-segment.active-3 { background: var(--score-3); }
.strength-segment.active-4 { background: var(--score-4); }

/* ===== STRENGTH RESULT ===== */
.strength-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 0.5rem 0 1rem;
  flex-wrap: wrap;
}

.strength-badge {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: color 0.25s ease;
}

.strength-badge.score-0 { color: var(--score-0); }
.strength-badge.score-1 { color: var(--score-1); }
.strength-badge.score-2 { color: var(--score-2); }
.strength-badge.score-3 { color: var(--score-3); }
.strength-badge.score-4 { color: var(--score-4); }

.strength-time {
  font-size: 0.8125rem;
  color: var(--text-muted);
  background: #f1f5f9;
  padding: 0.25rem 0.625rem;
  border-radius: 100px;
}

/* ===== ADVICE LIST ===== */
.advice-list {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: 0.75rem;
}

.advice-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: #dc2626;
  background: #fff5f5;
  border-radius: 6px;
  padding: 0.375rem 0.625rem;
}

.advice-item i {
  flex-shrink: 0;
  font-size: 0.875rem;
}

/* ===== SCORE LEGEND ===== */
.score-legend {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.score-legend summary {
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  user-select: none;
  transition: background var(--transition);
}

.score-legend summary::-webkit-details-marker { display: none; }
.score-legend summary::before {
  content: '\f282';
  font-family: 'bootstrap-icons';
  font-size: 0.75rem;
  transition: transform 0.2s ease;
}
.score-legend[open] summary::before { transform: rotate(90deg); }

.score-legend summary:hover { background: #f8fafc; }

.score-legend-body {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.score-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.8125rem;
}

.score-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.score-item.score-0 .score-dot { background: var(--score-0); }
.score-item.score-1 .score-dot { background: var(--score-1); }
.score-item.score-2 .score-dot { background: var(--score-2); }
.score-item.score-3 .score-dot { background: var(--score-3); }
.score-item.score-4 .score-dot { background: var(--score-4); }

/* ===== RANGE SLIDER ===== */
.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 100px;
  background: linear-gradient(to right, var(--primary) 0%, var(--primary) 50%, #e2e8f0 50%, #e2e8f0 100%);
  outline: none;
  cursor: pointer;
  min-height: 0;
  border: none;
  padding: 0;
  margin: 0.375rem 0;
  transition: background var(--transition);
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.4);
  transition: box-shadow var(--transition), transform var(--transition);
}

.range-slider::-webkit-slider-thumb:hover {
  box-shadow: 0 3px 10px rgba(var(--primary-rgb), 0.5);
  transform: scale(1.1);
}

.range-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.4);
}

.range-slider:focus {
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-weak);
  margin-top: 0.25rem;
}

/* ===== CHECKBOX GRID ===== */
.checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.625rem;
  margin-bottom: 1.25rem;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #f8fafc;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.625rem 0.875rem;
  cursor: pointer;
  min-height: 48px;
  transition: border-color var(--transition), background var(--transition);
}

.checkbox-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.checkbox-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

.checkbox-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 700;
  font-family: 'Outfit', sans-serif;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 48px;
  box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.35);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  margin-bottom: 1.25rem;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.4);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.3);
}

/* ===== GENERATED OUTPUT ===== */
.generated-output {
  background: linear-gradient(135deg, #e0f7fa, #f0fdff);
  border: 1.5px solid rgba(8, 145, 178, 0.25);
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.generated-password {
  flex: 1;
  font-family: 'Outfit', 'Courier New', monospace;
  font-size: clamp(0.9rem, 2.5vw, 1.15rem);
  font-weight: 600;
  color: var(--primary-hover);
  word-break: break-all;
  line-height: 1.5;
  min-width: 0;
}

.btn-copy {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.3);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-copy:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.4);
}

.btn-copy:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-copy.copied {
  background: #22c55e;
  box-shadow: 0 2px 8px rgba(34, 197, 94, 0.4);
}

/* ===== SECURITY INFO ===== */
.security-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.security-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.security-list li i {
  flex-shrink: 0;
  margin-top: 0.1rem;
  font-size: 1rem;
}

.text-primary { color: var(--primary); }

/* ===== HOWTO SECTION ===== */
.howto-section details summary {
  cursor: pointer;
  list-style: none;
  padding: 0;
}

.howto-section details summary::-webkit-details-marker { display: none; }

.inline-heading {
  display: inline;
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
}

.howto-body {
  margin-top: 1.25rem;
}

.howto-body h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text);
  margin: 1rem 0 0.5rem;
}

.howto-body h3:first-child { margin-top: 0; }

.howto-body ol {
  padding-left: 1.375rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.howto-body li,
.howto-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== FAQ SECTION ===== */
.faq-section h2 {
  margin-bottom: 1rem;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child { border-bottom: none; }

.faq-item summary {
  padding: 0.875rem 0.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  user-select: none;
  transition: color var(--transition);
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: '\f282';
  font-family: 'bootstrap-icons';
  font-size: 0.75rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.faq-item[open] summary::before { transform: rotate(90deg); }

.faq-item summary:hover { color: var(--primary); }

.faq-item p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.75;
  padding: 0 0.25rem 1rem;
}

/* ===== DISCLAIMER ===== */
.disclaimer-section h2 {
  color: #92400e;
}

.disclaimer-section h2 i {
  color: #d97706;
}

.disclaimer-section p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 2.5rem 1rem 2rem;
  border-top: 1px solid var(--border);
  margin-top: 1rem;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-weak);
}

/* ===== RESPONSIVE ===== */
@media (min-width: 640px) {
  main {
    padding: 1.75rem 1.5rem 3rem;
  }

  .card {
    padding: 2rem;
  }

  .checkbox-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  main {
    padding: 2rem 2rem 3rem;
  }
}