/**
 * オートブログAI Lite - Main Stylesheet
 * Design: 未来への希望、ワクワク感
 * Color: 紫→青グラデーション + オレンジアクセント
 */

/* ========================================
   CSS Variables
   ======================================== */
:root {
  /* Primary gradient - 未来感・テクノロジー */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-gradient-hover: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
  --primary: #667eea;
  --primary-dark: #5a67d8;
  --primary-light: #a3bffa;

  /* Accent - 希望・エネルギー */
  --accent: #f6ad55;
  --accent-bright: #fbd38d;
  --accent-dark: #dd6b20;

  /* Background - 柔らかさ */
  --bg-gradient: linear-gradient(180deg, #fdfbfb 0%, #f5f3ff 50%, #ebedee 100%);
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-sidebar: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);

  /* Success/Error/Warning */
  --success: #48bb78;
  --success-light: #c6f6d5;
  --error: #fc8181;
  --error-light: #fed7d7;
  --warning: #f6e05e;
  --warning-light: #fefcbf;

  /* Text */
  --text-primary: #2d3748;
  --text-secondary: #718096;
  --text-light: #a0aec0;
  --text-white: #ffffff;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(102, 126, 234, 0.15);
  --shadow-xl: 0 20px 40px rgba(102, 126, 234, 0.2);

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
}

/* ========================================
   Base Styles
   ======================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP',
               -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-gradient);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

/* ========================================
   Layout
   ======================================== */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-sidebar);
  color: var(--text-white);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  overflow: hidden;
  z-index: 100;
}

.sidebar-logo {
  padding: var(--spacing-md) 0 var(--spacing-xl);
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--spacing-lg);
}

.sidebar-logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-logo .subtitle {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: var(--spacing-xs);
}

.sidebar-nav {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: var(--spacing-sm);
}

.nav-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-xs);
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-white);
  transform: translateX(4px);
}

.nav-item.active {
  background: var(--primary-gradient);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.nav-item .icon {
  width: 20px;
  margin-right: var(--spacing-md);
  text-align: center;
}

.nav-section-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-light);
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-sm);
  opacity: 0.7;
}

.sidebar-footer {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  color: var(--text-light);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--primary-gradient);
  color: var(--text-white);
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 140;
}

.mobile-menu-toggle:active {
  transform: scale(0.98);
}

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  display: none;
  z-index: 120;
}

body.sidebar-open {
  overflow: hidden;
}

/* Main content */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: var(--spacing-xl);
  min-height: 100vh;
}

.page-header {
  margin-bottom: var(--spacing-xl);
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.page-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 28px;
  background: var(--primary-gradient);
  border-radius: 2px;
}

.page-description {
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
  font-size: 0.95rem;
}

/* ========================================
   Cards
   ======================================== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-normal);
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  color: var(--text-secondary);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--primary-gradient-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  color: var(--text-white);
}

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

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--text-white);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.btn-accent:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  color: var(--text-white);
}

.btn-success {
  background: var(--success);
  color: var(--text-white);
}

.btn-success:hover {
  background: #38a169;
  color: var(--text-white);
}

.btn-danger {
  background: var(--error);
  color: var(--text-white);
}

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

.btn-warning:hover {
  background: #ecc94b;
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.85rem;
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* ========================================
   Forms
   ======================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.form-label .required {
  color: var(--error);
  margin-left: var(--spacing-xs);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.form-input,
.form-select,
.form-textarea,
.form-control {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-md);
  background: white;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus,
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.form-input::placeholder {
  color: var(--text-light);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23718096' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

/* Input group */
.input-group {
  display: flex;
  gap: var(--spacing-sm);
}

.input-group .form-input {
  flex: 1;
}

/* ========================================
   Alerts
   ======================================== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.95rem;
}

.alert-success {
  background: var(--success-light);
  color: #276749;
  border: 1px solid var(--success);
}

.alert-error {
  background: var(--error-light);
  color: #c53030;
  border: 1px solid var(--error);
}

.alert-warning {
  background: var(--warning-light);
  color: #975a16;
  border: 1px solid var(--warning);
}

.alert-info {
  background: #bee3f8;
  color: #2b6cb0;
  border: 1px solid #63b3ed;
}

/* ========================================
   Stats Cards
   ======================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid rgba(102, 126, 234, 0.1);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

/* ========================================
   Checklist
   ======================================== */
.checklist {
  list-style: none;
}

.checklist-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

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

.checklist-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--spacing-md);
  font-size: 0.8rem;
}

.checklist-icon.complete {
  background: var(--success);
  color: white;
}

.checklist-icon.incomplete {
  background: #e2e8f0;
  color: var(--text-light);
}

.checklist-text {
  flex: 1;
}

.checklist-text.complete {
  color: var(--text-secondary);
}

.checklist-action {
  margin-left: var(--spacing-md);
}

/* ========================================
   Tables
   ======================================== */
.table-container {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid #e2e8f0;
}

.table th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table tbody tr {
  transition: background var(--transition-fast);
}

.table tbody tr:hover {
  background: rgba(102, 126, 234, 0.05);
}

/* ========================================
   Badges
   ======================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.badge-success {
  background: var(--success-light);
  color: #276749;
}

.badge-error {
  background: var(--error-light);
  color: #c53030;
}

.badge-warning {
  background: var(--warning-light);
  color: #975a16;
}

.badge-info {
  background: #bee3f8;
  color: #2b6cb0;
}

/* ========================================
   Loading States
   ======================================== */
.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-content {
  text-align: center;
}

.loading-content .spinner-large {
  width: 50px;
  height: 50px;
  border: 4px solid var(--primary-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-lg);
}

/* ========================================
   Auth Pages (Login/Setup)
   ======================================== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-gradient);
  padding: var(--spacing-xl);
}

.auth-container {
  width: 100%;
  max-width: 420px;
}

.auth-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--primary-gradient);
}

.auth-logo {
  margin-bottom: var(--spacing-xl);
}

.auth-logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-logo .subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

.auth-form {
  text-align: left;
  margin-top: var(--spacing-xl);
}

.auth-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid #e2e8f0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ========================================
   Preview Area
   ======================================== */
.preview-container {
  background: white;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  min-height: 300px;
}

.preview-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.preview-content {
  color: var(--text-secondary);
  line-height: 1.8;
}

.preview-content h2 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin: var(--spacing-xl) 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--primary-light);
}

.preview-content h3 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.preview-content p {
  margin-bottom: var(--spacing-md);
}

/* ========================================
   Classic Editor (Simple)
   ======================================== */
.editor-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.editor-tab {
  padding: 0.35rem 0.75rem;
  border: 1px solid #cbd5e0;
  border-radius: 6px;
  background: #edf2f7;
  font-size: 0.85rem;
  cursor: pointer;
}

.editor-tab.active {
  background: #ffffff;
  font-weight: 600;
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.5rem;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #f7fafc;
  margin-bottom: 0.5rem;
}

.editor-toolbar button {
  padding: 0.3rem 0.6rem;
  border: 1px solid #cbd5e0;
  border-radius: 4px;
  background: #ffffff;
  font-size: 0.85rem;
  cursor: pointer;
}

.editor-toolbar button:hover {
  background: #edf2f7;
}

.editor-area.visual {
  min-height: 300px;
  outline: none;
}

.editor-area.html {
  width: 100%;
  min-height: 300px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
}

.preview-content ul {
  margin-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
  .sidebar {
    width: 220px;
  }
  .main-content {
    margin-left: 220px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -260px;
    transition: left var(--transition-normal);
    z-index: 130;
  }
  .sidebar.open {
    left: 0;
  }
  .main-content {
    margin-left: 0;
  }
  .mobile-menu-toggle {
    display: inline-flex;
  }
  body.sidebar-open .mobile-menu-overlay {
    display: block;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .auth-card {
    padding: var(--spacing-xl);
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-warning { color: var(--warning); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

.hidden { display: none !important; }

/* ========================================
   FANZA Article Elements
   ======================================== */
:root {
  --card-bg: #ffffff;
  --card-border: #ececec;
  --card-shadow: 0 6px 20px rgba(0,0,0,0.08);
  --cta-bg: #e60033;
  --cta-text: #ffffff;
  --cta-radius: 10px;
}

.kaereba-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  padding: 16px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  margin: 16px 0;
}

.kaereba-thumb img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}

.kaereba-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.kaereba-copy {
  font-size: 14px;
  color: #555;
  margin-bottom: 12px;
}

.kaereba-cta {
  display: inline-block;
  padding: 10px 16px;
  background: var(--cta-bg);
  color: var(--cta-text);
  border-radius: var(--cta-radius);
  text-decoration: none;
  font-weight: 700;
}

.fanza-image {
  margin: 16px 0;
}

.fanza-image img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

.fanza-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.fanza-image-grid img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  display: block;
}

.fanza-video {
  margin: 20px 0;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
}

.fanza-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

@media (max-width: 640px) {
  .kaereba-card { grid-template-columns: 1fr; }
  .kaereba-cta { width: 100%; text-align: center; }
}