/* ==========================================================================
   SEISYOU eBook Studio - Admin UI Styles
   Modern, clean design / Japanese-friendly / Mobile responsive
   ========================================================================== */

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

:root {
  --primary: #489a89;
  --primary-dark: #3d8577;
  --primary-light: #eff5f5;
  --success: #22c55e;
  --success-dark: #16a34a;
  --success-light: #dcfce7;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  --danger-light: #fef2f2;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --purple: #8b5cf6;
  --purple-light: #f3e8ff;
  --bg: #f5f6fa;
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --header-bg: #1a1a2e;
  --header-height: 56px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --radius: 8px;
  --radius-sm: 6px;
  --radius-lg: 12px;
  --font: 'Segoe UI', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --transition: 0.2s ease;
}

html { font-size: 14px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }

/* ======= Header ======= */
.app-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-height);
  background: var(--header-bg);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.header-left { display: flex; align-items: center; gap: 8px; }
.header-logo {
  display: flex; align-items: center; gap: 10px;
  color: #fff; text-decoration: none;
}
.header-logo svg { flex-shrink: 0; }
.header-title { font-size: 17px; font-weight: 600; color: #fff; }
.header-right { display: flex; align-items: center; gap: 12px; }
.header-user {
  display: flex; align-items: center; gap: 6px;
  color: #b0b8cc; font-size: 13px;
}

/* ======= Main Content ======= */
.main-content { padding: 24px 0; min-height: calc(100vh - var(--header-height)); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-md { max-width: 860px; }

/* ======= Buttons ======= */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border: none; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; font-family: var(--font);
  cursor: pointer; transition: all var(--transition);
  text-decoration: none; white-space: nowrap; line-height: 1.4;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { background: var(--success-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: var(--danger-dark); }
.btn-outline { background: transparent; border: 1px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { background: var(--gray-50); border-color: var(--gray-400); }
.btn-ghost { background: transparent; color: var(--gray-500); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); color: #fff; }
.btn-danger-text { color: var(--danger) !important; }
.btn-danger-text:hover { background: var(--danger-light) !important; }

/* ======= Cards ======= */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  overflow: hidden;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: space-between;
}
.card-header h2 { font-size: 16px; font-weight: 600; color: var(--gray-900); }
.card-body { padding: 20px; }
.card-header.collapsible { cursor: pointer; user-select: none; }
.card-header.collapsible:hover { background: var(--gray-50); }
.collapse-icon { transition: transform var(--transition); color: var(--gray-400); }
.card-header.collapsible.open .collapse-icon { transform: rotate(180deg); }

/* ======= Forms ======= */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--gray-600); margin-bottom: 6px;
}
.form-input, .form-select {
  width: 100%; padding: 10px 14px;
  border: 1px solid var(--gray-300); border-radius: var(--radius-sm);
  font-size: 14px; font-family: var(--font);
  background: var(--white); color: var(--gray-800);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-input:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(72,154,137,0.15);
}
.form-hint { font-size: 12px; color: var(--gray-400); margin-top: 4px; }
.required { color: var(--danger); }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 200px; }
.form-check { margin-bottom: 16px; }
.form-check label {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--gray-600); cursor: pointer;
}
.form-check input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--primary); }

/* Radio cards */
.radio-group { display: flex; gap: 12px; flex-wrap: wrap; }
.radio-card { cursor: pointer; }
.radio-card input { display: none; }
.radio-card-content {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 12px 20px;
  border: 2px solid var(--gray-200); border-radius: var(--radius);
  transition: all var(--transition);
  font-size: 13px; color: var(--gray-600);
}
.radio-card input:checked + .radio-card-content {
  border-color: var(--primary); background: var(--primary-light); color: var(--primary);
}
.radio-card-content:hover { border-color: var(--gray-300); }

/* Toggle */
.toggle { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.toggle-slider {
  position: relative; width: 44px; height: 24px;
  background: var(--gray-300); border-radius: 12px;
  transition: background var(--transition);
}
.toggle-slider::after {
  content: ''; position: absolute; left: 2px; top: 2px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--white); box-shadow: var(--shadow-sm);
  transition: transform var(--transition);
}
.toggle input { display: none; }
.toggle input:checked + .toggle-slider { background: var(--primary); }
.toggle input:checked + .toggle-slider::after { transform: translateX(20px); }
.toggle-label { font-size: 13px; color: var(--gray-500); min-width: 28px; }

/* Checkbox group */
.checkbox-group { display: flex; gap: 16px; flex-wrap: wrap; }
.checkbox-item {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--gray-600); cursor: pointer;
}
.checkbox-item input { width: 16px; height: 16px; accent-color: var(--primary); }

/* ======= Page Header ======= */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px; flex-wrap: wrap; gap: 12px;
}
.page-title { font-size: 22px; font-weight: 700; color: var(--gray-900); }

/* ======= Breadcrumb ======= */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 20px; font-size: 13px; color: var(--gray-400);
}
.breadcrumb a { color: var(--gray-500); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--gray-300); }

/* ======= Stats Grid ======= */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 20px; display: flex; align-items: center; gap: 16px;
  box-shadow: var(--shadow);
}
.stat-card-icon {
  width: 48px; height: 48px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.stat-card-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-card-icon.green { background: var(--success-light); color: var(--success); }
.stat-card-icon.purple { background: var(--purple-light); color: var(--purple); }
.stat-card-value { font-size: 24px; font-weight: 700; color: var(--gray-900); }
.stat-card-label { font-size: 12px; color: var(--gray-400); margin-top: 2px; }

/* ======= Filter Bar ======= */
.filter-bar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; gap: 12px; flex-wrap: wrap;
}
.filter-left { flex: 1; min-width: 200px; }
.search-box {
  position: relative; display: flex; align-items: center;
}
.search-box svg {
  position: absolute; left: 12px; color: var(--gray-400); pointer-events: none;
}
.search-input {
  width: 100%; max-width: 360px; padding: 9px 14px 9px 36px;
  border: 1px solid var(--gray-300); border-radius: var(--radius-sm);
  font-size: 14px; font-family: var(--font); outline: none;
  transition: border-color var(--transition);
}
.search-input:focus { border-color: var(--primary); }
.filter-right { display: flex; gap: 8px; }
.form-select {
  min-width: 140px; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
  padding-right: 32px;
}

/* ======= eBook Grid ======= */
.ebook-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.ebook-card {
  background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.ebook-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.ebook-card-thumb {
  position: relative; height: 180px; overflow: hidden;
  background: var(--gray-100);
}
.ebook-card-thumb img {
  width: 100%; height: 100%; object-fit: cover;
}
.ebook-card-body { padding: 16px; }
.ebook-card-title {
  font-size: 15px; font-weight: 600; color: var(--gray-900);
  margin-bottom: 4px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.ebook-card-client { font-size: 12px; color: var(--gray-400); margin-bottom: 8px; }
.ebook-card-meta {
  display: flex; gap: 12px; font-size: 12px; color: var(--gray-400);
  flex-wrap: wrap;
}
.ebook-card-actions {
  display: flex; gap: 4px; padding: 8px 12px;
  border-top: 1px solid var(--gray-100);
  justify-content: flex-end;
}

/* Badge */
.badge {
  display: inline-flex; align-items: center; padding: 3px 8px;
  border-radius: 10px; font-size: 11px; font-weight: 600;
  position: absolute; top: 8px; right: 8px;
}
.badge-success { background: var(--success-light); color: var(--success-dark); }
.badge-warning { background: var(--warning-light); color: #92400e; }
.badge-error { background: var(--danger-light); color: var(--danger-dark); }

/* ======= Loading & Empty States ======= */
.loading-state {
  display: flex; flex-direction: column; align-items: center;
  padding: 60px 20px; color: var(--gray-400);
  grid-column: 1 / -1;
}
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%; animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
  display: flex; flex-direction: column; align-items: center;
  padding: 60px 20px; color: var(--gray-400);
}
.empty-state h3 { font-size: 18px; color: var(--gray-600); margin: 16px 0 8px; }
.empty-state p { margin-bottom: 20px; font-size: 14px; }

/* ======= Modal ======= */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); width: 90%; max-width: 480px;
  transform: translateY(20px); transition: transform var(--transition);
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--gray-200);
}
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close {
  background: none; border: none; font-size: 24px;
  color: var(--gray-400); cursor: pointer; line-height: 1;
}
.modal-close:hover { color: var(--gray-600); }
.modal-body { padding: 20px; }
.modal-body p { font-size: 14px; line-height: 1.7; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 12px 20px; border-top: 1px solid var(--gray-200);
}

/* ======= Toast ======= */
#toast-container {
  position: fixed; top: 72px; right: 20px; z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius-sm);
  background: var(--gray-800); color: #fff;
  font-size: 13px; box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
  max-width: 360px;
}
.toast.success { background: var(--success-dark); }
.toast.error { background: var(--danger-dark); }
.toast.fade-out { animation: toastOut 0.3s ease forwards; }
@keyframes toastIn { from { opacity:0; transform:translateX(30px); } to { opacity:1; transform:translateX(0); } }
@keyframes toastOut { to { opacity:0; transform:translateX(30px); } }

/* ======= Drop Zone ======= */
.drop-zone {
  border: 2px dashed var(--gray-300); border-radius: var(--radius);
  padding: 48px 24px; text-align: center; cursor: pointer;
  transition: all var(--transition); background: var(--gray-50);
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--primary); background: var(--primary-light);
}
.drop-zone svg { margin: 0 auto 12px; }
.drop-zone p { color: var(--gray-500); font-size: 14px; }
.drop-zone-hint { color: var(--gray-400); font-size: 12px; margin-top: 4px; }
.drop-zone.has-file { display: none; }

.file-info {
  display: flex; align-items: center; gap: 12px;
  padding: 14px; background: var(--primary-light);
  border-radius: var(--radius-sm); margin-top: 12px;
}
.file-info-name { font-weight: 600; font-size: 14px; color: var(--gray-800); }
.file-info-size { font-size: 12px; color: var(--gray-500); }

/* ======= Step Indicator ======= */
.step-indicator {
  display: flex; align-items: center; justify-content: center;
  gap: 0; margin-bottom: 28px; padding: 0 20px;
}
.step-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--gray-400);
}
.step-item.active { color: var(--primary); }
.step-item.active .step-num { background: var(--primary); color: #fff; }
.step-item.completed { color: var(--success); }
.step-item.completed .step-num { background: var(--success); color: #fff; }
.step-num {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600;
  background: var(--gray-200); color: var(--gray-500);
  flex-shrink: 0;
}
.step-line {
  width: 48px; height: 2px; background: var(--gray-200);
  margin: 0 8px; flex-shrink: 0;
}

/* ======= Progress ======= */
.progress-container { margin-bottom: 24px; }
.progress-bar-wrapper {
  height: 8px; background: var(--gray-200); border-radius: 4px;
  overflow: hidden; margin-bottom: 8px;
}
.progress-bar {
  height: 100%; background: var(--primary);
  border-radius: 4px; transition: width 0.3s;
}
.progress-percent {
  text-align: center; font-size: 20px; font-weight: 700;
  color: var(--primary); margin-bottom: 16px;
}

.progress-phases { display: flex; flex-direction: column; gap: 8px; }
.phase-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: var(--radius-sm);
  font-size: 13px; color: var(--gray-500);
}
.phase-item[data-status="active"] { background: var(--primary-light); color: var(--primary); font-weight: 500; }
.phase-item[data-status="done"] { color: var(--success); }
.phase-item[data-status="error"] { color: var(--danger); }
.phase-icon { font-size: 16px; width: 20px; text-align: center; }
.phase-item[data-status="active"] .phase-icon { animation: spin 1s linear infinite; display: inline-block; }
.phase-counter { margin-left: auto; font-size: 12px; color: var(--gray-400); }

/* ======= Success Banner ======= */
.success-banner {
  display: flex; flex-direction: column; align-items: center;
  padding: 24px; text-align: center;
}
.success-banner h2 { font-size: 20px; color: var(--success-dark); margin-top: 12px; }

/* ======= Stats Row ======= */
.stats-row {
  display: flex; gap: 16px; justify-content: center;
  flex-wrap: wrap; margin-top: 20px; margin-bottom: 8px;
}
.stat-item-sm {
  text-align: center; padding: 12px 20px;
  background: var(--gray-50); border-radius: var(--radius-sm);
  min-width: 120px;
}
.stat-item-sm .stat-value { font-size: 22px; font-weight: 700; color: var(--gray-900); }
.stat-item-sm .stat-label { font-size: 11px; color: var(--gray-400); margin-top: 4px; }

/* ======= Preview Frame ======= */
.preview-frame {
  width: 100%; background: #8a8a8a; border-radius: var(--radius);
  overflow: hidden;
}

/* ======= TOC Table ======= */
.toc-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.toc-table th {
  text-align: left; padding: 8px 12px; font-weight: 600;
  color: var(--gray-500); font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.5px; border-bottom: 2px solid var(--gray-200);
}
.toc-table td {
  padding: 8px 12px; border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
.toc-table input {
  width: 100%; padding: 6px 10px; border: 1px solid var(--gray-200);
  border-radius: 4px; font-size: 13px; font-family: var(--font);
  outline: none;
}
.toc-table input:focus { border-color: var(--primary); }
.toc-table input[type="number"] { width: 70px; text-align: center; }
.toc-table select { padding: 6px 8px; border: 1px solid var(--gray-200); border-radius: 4px; font-size: 13px; }

/* ======= Action Bar ======= */
.action-bar {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 20px; margin-bottom: 20px; flex-wrap: wrap; gap: 12px;
}
.action-bar-right { display: flex; gap: 8px; }

/* ======= Alert ======= */
.alert {
  padding: 12px 16px; border-radius: var(--radius-sm);
  font-size: 13px; margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.alert-error { background: var(--danger-light); color: var(--danger-dark); border: 1px solid #fecaca; }
.alert-success { background: var(--success-light); color: var(--success-dark); border: 1px solid #bbf7d0; }
.alert-icon { font-size: 16px; }

/* ======= Login Page ======= */
.login-page {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
}
.login-container { width: 100%; max-width: 400px; padding: 20px; }
.login-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-lg);
}
.login-header { text-align: center; margin-bottom: 28px; }
.login-logo { margin-bottom: 16px; }
.login-logo svg { margin: 0 auto; }
.login-header h1 { font-size: 22px; color: var(--gray-900); margin-bottom: 4px; }
.login-subtitle { font-size: 13px; color: var(--gray-400); }
.login-form .form-group { margin-bottom: 18px; }
.login-form .btn { margin-top: 8px; padding: 12px; font-size: 15px; }
.login-footer { text-align: center; color: rgba(255,255,255,0.3); font-size: 12px; margin-top: 20px; }

/* ======= Helpers ======= */
.text-center { text-align: center; }
.text-muted { color: var(--gray-400); font-size: 13px; margin-top: 8px; }
.text-danger { color: var(--danger); }
.mt-2 { margin-top: 8px; }
.mb-2 { margin-bottom: 8px; }

/* ======= No cover SVG placeholder ======= */
.ebook-card-thumb img[src$="no-cover.svg"] {
  object-fit: contain; padding: 30px; background: var(--gray-100);
}

/* ======= Mobile Responsive ======= */
@media (max-width: 768px) {
  html { font-size: 13px; }
  .app-header { padding: 0 12px; }
  .header-title { font-size: 15px; }
  .main-content { padding: 16px 0; }
  .container { padding: 0 12px; }

  .page-header { flex-direction: column; align-items: stretch; }
  .page-header .btn { justify-content: center; }

  .stats-grid { grid-template-columns: 1fr; }
  .ebook-grid { grid-template-columns: 1fr; }

  .filter-bar { flex-direction: column; }
  .search-input { max-width: 100%; }

  .form-row { flex-direction: column; }
  .form-row .form-group { min-width: 100%; }

  .step-indicator { flex-wrap: wrap; gap: 4px; }
  .step-item span { display: none; }
  .step-line { width: 24px; }

  .radio-group { flex-direction: column; }
  .direction-group { flex-direction: row; }

  .action-bar { flex-direction: column; }
  .action-bar .btn { width: 100%; justify-content: center; }
  .action-bar-right { width: 100%; flex-direction: column; }

  .toc-table { font-size: 12px; }
  .toc-table th, .toc-table td { padding: 6px 8px; }
}

@media (max-width: 480px) {
  .ebook-card-thumb { height: 140px; }
  .stat-card { padding: 14px; }
  .stat-card-value { font-size: 20px; }
  .login-card { padding: 24px; }
}