/**
 * POSACO Tools Common CSS
 * 共通デザインシステム
 */

/* =============================================================================
   CSS Variables
   ============================================================================= */

:root {
  /* Colors - Primary (index.html基準) */
  --posaco-color-primary: #2a7ab8;
  --posaco-color-primary-hover: #1e5a8a;

  /* Colors - Accent */
  --posaco-color-accent-blue: #2a7ab8;
  --posaco-color-accent-green: #5a9a1f;
  --posaco-color-accent-yellow: #c9a800;
  --posaco-color-accent-purple: #9a4d80;

  /* Colors - Background */
  --posaco-color-bg-primary: #ffffff;
  --posaco-color-bg-secondary: #f5f7fa;
  --posaco-color-bg-tertiary: #e8f4f8;
  --posaco-color-bg-accent: #d4e5f7;

  /* Colors - Text */
  --posaco-color-text-primary: #1a1a2e;
  --posaco-color-text-secondary: rgba(26, 26, 46, 0.7);
  --posaco-color-text-muted: rgba(26, 26, 46, 0.5);

  /* Colors - Card (Glassmorphism) */
  --posaco-color-card-bg: rgba(255, 255, 255, 0.7);
  --posaco-color-card-border: rgba(0, 0, 0, 0.1);
  --posaco-color-glow: rgba(42, 122, 184, 0.2);

  /* Colors - Border */
  --posaco-color-border: rgba(0, 0, 0, 0.1);
  --posaco-color-border-focus: #2a7ab8;

  /* Typography */
  --posaco-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --posaco-font-size-base: 1rem;
  --posaco-font-size-sm: 0.9rem;
  --posaco-font-size-lg: 1.1rem;
  --posaco-font-size-h1: 2.5rem;
  --posaco-font-size-h2: 1.25rem;
  --posaco-font-size-h3: 1.1rem;
  --posaco-line-height: 1.6;

  /* Spacing */
  --posaco-spacing-xs: 0.25rem;
  --posaco-spacing-sm: 0.5rem;
  --posaco-spacing-md: 1rem;
  --posaco-spacing-lg: 1.5rem;
  --posaco-spacing-xl: 2rem;

  /* Border Radius */
  --posaco-radius-sm: 4px;
  --posaco-radius-md: 10px;
  --posaco-radius-lg: 16px;

  /* Shadows */
  --posaco-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --posaco-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --posaco-shadow-glow: 0 0 30px var(--posaco-color-glow);

  /* Transitions */
  --posaco-transition-fast: 0.2s ease;
  --posaco-transition-normal: 0.3s ease;
}

/* =============================================================================
   CSS Reset & Base Styles
   ============================================================================= */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--posaco-font-family);
  font-size: var(--posaco-font-size-base);
  line-height: var(--posaco-line-height);
  color: var(--posaco-color-text-primary);
  background-color: var(--posaco-color-bg-tertiary);
}

/* Link Reset */
a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Image Reset */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* =============================================================================
   Typography
   ============================================================================= */

h1 {
  font-size: var(--posaco-font-size-h1);
  font-weight: 700;
  line-height: 1.2;
  color: var(--posaco-color-text-primary);
}

h2 {
  font-size: var(--posaco-font-size-h2);
  font-weight: 600;
  line-height: 1.3;
  color: var(--posaco-color-text-primary);
}

h3 {
  font-size: var(--posaco-font-size-h3);
  font-weight: 600;
  line-height: 1.4;
  color: var(--posaco-color-text-primary);
}

p {
  margin-bottom: var(--posaco-spacing-md);
}

/* Responsive Typography */
@media (max-width: 768px) {
  :root {
    --posaco-font-size-h1: 2rem;
    --posaco-font-size-h2: 1.1rem;
    --posaco-font-size-h3: 1rem;
  }
}

/* =============================================================================
   Button Components
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--posaco-spacing-sm) var(--posaco-spacing-lg);
  font-family: var(--posaco-font-family);
  font-size: var(--posaco-font-size-base);
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--posaco-radius-sm);
  cursor: pointer;
  transition: background-color var(--posaco-transition-fast),
              border-color var(--posaco-transition-fast),
              color var(--posaco-transition-fast);
}

.btn:hover {
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--posaco-color-primary-hover);
  border-color: var(--posaco-color-primary-hover);
}

.btn-secondary {
  background-color: var(--posaco-color-bg-secondary);
  border-color: var(--posaco-color-border);
  color: var(--posaco-color-text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--posaco-color-bg-tertiary);
}

/* =============================================================================
   Form Elements
   ============================================================================= */

.input,
.select {
  display: block;
  width: 100%;
  padding: var(--posaco-spacing-sm) var(--posaco-spacing-md);
  font-family: var(--posaco-font-family);
  font-size: var(--posaco-font-size-base);
  line-height: 1.5;
  color: var(--posaco-color-text-primary);
  background-color: var(--posaco-color-bg-primary);
  border: 1px solid var(--posaco-color-border);
  border-radius: var(--posaco-radius-sm);
  transition: border-color var(--posaco-transition-fast);
}

.input:focus,
.select:focus {
  outline: none;
  border-color: var(--posaco-color-border-focus);
}

.input::placeholder {
  color: var(--posaco-color-text-muted);
}

/* Checkbox */
.checkbox {
  display: inline-flex;
  align-items: center;
  gap: var(--posaco-spacing-sm);
  cursor: pointer;
}

.checkbox input[type='checkbox'] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--posaco-color-primary);
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background-color: #ccc;
  border-radius: 22px;
  transition: background-color var(--posaco-transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  left: 2px;
  bottom: 2px;
  width: 18px;
  height: 18px;
  background-color: #fff;
  border-radius: 50%;
  transition: transform var(--posaco-transition-fast);
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--posaco-color-primary);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(18px);
}

.toggle-switch input:focus-visible + .toggle-slider {
  outline: 2px solid var(--posaco-color-primary);
  outline-offset: 2px;
}

/* Segmented Control */
.segmented-control {
  display: inline-flex;
  border: 1px solid var(--posaco-color-border);
  border-radius: var(--posaco-radius-sm);
  overflow: hidden;
}

.seg-btn {
  padding: 4px 10px;
  font-size: var(--posaco-font-size-sm);
  font-family: var(--posaco-font-family);
  background: var(--posaco-color-bg-primary);
  border: none;
  border-right: 1px solid var(--posaco-color-border);
  cursor: pointer;
  transition: background-color var(--posaco-transition-fast),
              color var(--posaco-transition-fast);
  color: var(--posaco-color-text-secondary);
}

.seg-btn:last-child {
  border-right: none;
}

.seg-btn:hover:not(.active) {
  background: var(--posaco-color-bg-secondary);
}

.seg-btn.active {
  background: var(--posaco-color-primary);
  color: #ffffff;
}

/* Color Picker */
.color-picker {
  width: 40px;
  height: 28px;
  padding: 2px;
  border: 1px solid var(--posaco-color-border);
  border-radius: var(--posaco-radius-sm);
  cursor: pointer;
  background: var(--posaco-color-bg-primary);
}

.color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 2px;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--posaco-color-border);
  margin: 8px 0;
}

.center-hint {
  font-size: 11px;
  color: #94a3b8;
  line-height: 1.3;
}

/* =============================================================================
   Card & Panel Components
   ============================================================================= */

.card {
  background: rgba(255, 255, 255, 0.95); /* Fallback */
  background: var(--posaco-color-card-bg, rgba(255, 255, 255, 0.95));
  border: 1px solid var(--posaco-color-card-border);
  border-radius: var(--posaco-radius-lg);
  padding: var(--posaco-spacing-lg);
  box-shadow: var(--posaco-shadow-sm);
}

@supports (backdrop-filter: blur(10px)) {
  .card {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
}

.panel {
  background-color: var(--posaco-color-bg-secondary);
  border: 1px solid var(--posaco-color-border);
  border-radius: var(--posaco-radius-md);
  padding: var(--posaco-spacing-lg);
}

/* =============================================================================
   Layout Utilities
   ============================================================================= */

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--posaco-spacing-xl);
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.flex-col {
  display: flex;
  flex-direction: column;
}

/* Gap Utilities */
.gap-xs { gap: var(--posaco-spacing-xs); }
.gap-sm { gap: var(--posaco-spacing-sm); }
.gap-md { gap: var(--posaco-spacing-md); }
.gap-lg { gap: var(--posaco-spacing-lg); }
.gap-xl { gap: var(--posaco-spacing-xl); }

/* Grid Utilities */
.grid {
  display: grid;
}

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

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* =============================================================================
   Spacing Utilities
   ============================================================================= */

/* Margin */
.m-xs { margin: var(--posaco-spacing-xs); }
.m-sm { margin: var(--posaco-spacing-sm); }
.m-md { margin: var(--posaco-spacing-md); }
.m-lg { margin: var(--posaco-spacing-lg); }
.m-xl { margin: var(--posaco-spacing-xl); }

.mt-xs { margin-top: var(--posaco-spacing-xs); }
.mt-sm { margin-top: var(--posaco-spacing-sm); }
.mt-md { margin-top: var(--posaco-spacing-md); }
.mt-lg { margin-top: var(--posaco-spacing-lg); }
.mt-xl { margin-top: var(--posaco-spacing-xl); }

.mb-xs { margin-bottom: var(--posaco-spacing-xs); }
.mb-sm { margin-bottom: var(--posaco-spacing-sm); }
.mb-md { margin-bottom: var(--posaco-spacing-md); }
.mb-lg { margin-bottom: var(--posaco-spacing-lg); }
.mb-xl { margin-bottom: var(--posaco-spacing-xl); }

.ml-xs { margin-left: var(--posaco-spacing-xs); }
.ml-sm { margin-left: var(--posaco-spacing-sm); }
.ml-md { margin-left: var(--posaco-spacing-md); }
.ml-lg { margin-left: var(--posaco-spacing-lg); }
.ml-xl { margin-left: var(--posaco-spacing-xl); }

.mr-xs { margin-right: var(--posaco-spacing-xs); }
.mr-sm { margin-right: var(--posaco-spacing-sm); }
.mr-md { margin-right: var(--posaco-spacing-md); }
.mr-lg { margin-right: var(--posaco-spacing-lg); }
.mr-xl { margin-right: var(--posaco-spacing-xl); }

/* Padding */
.p-xs { padding: var(--posaco-spacing-xs); }
.p-sm { padding: var(--posaco-spacing-sm); }
.p-md { padding: var(--posaco-spacing-md); }
.p-lg { padding: var(--posaco-spacing-lg); }
.p-xl { padding: var(--posaco-spacing-xl); }

.pt-xs { padding-top: var(--posaco-spacing-xs); }
.pt-sm { padding-top: var(--posaco-spacing-sm); }
.pt-md { padding-top: var(--posaco-spacing-md); }
.pt-lg { padding-top: var(--posaco-spacing-lg); }
.pt-xl { padding-top: var(--posaco-spacing-xl); }

.pb-xs { padding-bottom: var(--posaco-spacing-xs); }
.pb-sm { padding-bottom: var(--posaco-spacing-sm); }
.pb-md { padding-bottom: var(--posaco-spacing-md); }
.pb-lg { padding-bottom: var(--posaco-spacing-lg); }
.pb-xl { padding-bottom: var(--posaco-spacing-xl); }

.pl-xs { padding-left: var(--posaco-spacing-xs); }
.pl-sm { padding-left: var(--posaco-spacing-sm); }
.pl-md { padding-left: var(--posaco-spacing-md); }
.pl-lg { padding-left: var(--posaco-spacing-lg); }
.pl-xl { padding-left: var(--posaco-spacing-xl); }

.pr-xs { padding-right: var(--posaco-spacing-xs); }
.pr-sm { padding-right: var(--posaco-spacing-sm); }
.pr-md { padding-right: var(--posaco-spacing-md); }
.pr-lg { padding-right: var(--posaco-spacing-lg); }
.pr-xl { padding-right: var(--posaco-spacing-xl); }

/* =============================================================================
   Accessibility
   ============================================================================= */

/* Focus States */
:focus-visible {
  outline: 2px solid var(--posaco-color-primary);
  outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* =============================================================================
   Responsive Breakpoints
   ============================================================================= */

@media (max-width: 768px) {
  .container {
    padding: 0 var(--posaco-spacing-md);
  }

  .grid-cols-2,
  .grid-cols-3 {
    grid-template-columns: 1fr;
  }
}