/* JF業務マニュアルQA - 自前CSS (CDN依存なし) */
:root {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-muted: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --primary: #1e40af;
  --primary-hover: #1e3a8a;
  --primary-light: #dbeafe;
  --danger: #b91c1c;
  --warning: #b45309;
  --warning-bg: #fef3c7;
  --success: #15803d;
  --success-bg: #dcfce7;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --radius-sm: 4px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, "Helvetica Neue", "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Header ===== */
.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.app-header h1 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  color: var(--primary);
}
.app-header .meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.app-header form { display: inline; margin: 0; }
.app-header .btn-link {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 13px;
  padding: 0;
  text-decoration: underline;
}
.app-header .btn-link:hover { color: var(--danger); }

/* ===== Container ===== */
.container {
  max-width: 920px;
  width: 100%;
  margin: 0 auto;
  padding: 20px;
  flex: 1;
}
.container-wide {
  max-width: 1280px;
}

/* ===== Login ===== */
.login-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}
.login-card h2 {
  margin: 0 0 8px 0;
  font-size: 22px;
  color: var(--primary);
}
.login-card .subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}

/* ===== Forms ===== */
.form-row { margin-bottom: 16px; }
.form-row label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}
.form-row input[type="text"],
.form-row input[type="password"],
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text);
  font-family: inherit;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: 2px solid var(--primary-light);
  border-color: var(--primary);
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

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

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: #991b1b; }

.btn-block { display: block; width: 100%; }

/* ===== Alerts ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-error {
  background: #fef2f2;
  border-left: 4px solid var(--danger);
  color: var(--danger);
}
.alert-warning {
  background: var(--warning-bg);
  border-left: 4px solid var(--warning);
  color: var(--warning);
}
.alert-success {
  background: var(--success-bg);
  border-left: 4px solid var(--success);
  color: var(--success);
}
.alert-info {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  color: var(--primary);
}

/* ===== Chat ===== */
.chat-main {
  display: flex;
  flex-direction: column;
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 20px;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 0;
}
.chat-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  font-size: 14px;
}
.chat-empty h3 {
  color: var(--text);
  font-size: 16px;
  margin: 0 0 12px 0;
}
.chat-empty ul {
  text-align: left;
  display: inline-block;
  margin: 8px 0;
  padding-left: 20px;
}
.chat-empty li { margin: 4px 0; }

.msg {
  padding: 14px 18px;
  border-radius: var(--radius);
  max-width: 92%;
  white-space: pre-wrap;
  word-wrap: break-word;
  line-height: 1.7;
}
.msg-user {
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
  align-self: flex-end;
}
.msg-assistant {
  background: var(--bg-card);
  border: 1px solid var(--border);
  align-self: flex-start;
}
.msg-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.msg-guard-badge {
  background: var(--warning-bg);
  color: var(--warning);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
}

/* 引用カード (inline button) */
.citation {
  display: inline-block;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  color: var(--primary);
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin: 0 2px;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
}
.citation:hover {
  background: var(--primary-light);
  text-decoration: none;
}

/* ===== Composer ===== */
.composer {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  gap: 8px;
  align-items: flex-end;
  margin-top: 12px;
  position: sticky;
  bottom: 12px;
  box-shadow: var(--shadow);
}
.composer textarea {
  flex: 1;
  min-height: 44px;
  max-height: 200px;
  resize: vertical;
  padding: 10px 12px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  background: var(--bg-card);
}
.composer textarea:focus {
  outline: 2px solid var(--primary-light);
  border-color: var(--primary);
}
.composer-help {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 6px;
}

/* ===== Modal (PDF preview) ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--bg-card);
  border-radius: var(--radius);
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  position: relative;
}
.modal-header {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--bg-card);
  z-index: 1;
}
.modal-body { padding: 12px; }
.modal-body img {
  max-width: 100%;
  height: auto;
  display: block;
}
.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0;
  line-height: 1;
}

/* ===== Admin ===== */
.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.stat-card .label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.stat-card .value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}

.admin-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.admin-section h3 {
  margin: 0 0 16px 0;
  font-size: 16px;
  font-weight: 700;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table th, table td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table th {
  background: var(--bg-muted);
  font-weight: 500;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
table tbody tr:hover { background: var(--bg-muted); }
.table-scroll { overflow-x: auto; max-width: 100%; }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
}
.tag-guard { background: var(--warning-bg); color: var(--warning); }
.tag-safe { background: var(--success-bg); color: var(--success); }
.tag-admin { background: var(--primary-light); color: var(--primary); }
.tag-fail { background: #fee2e2; color: var(--danger); }
.tag-ok { background: var(--success-bg); color: var(--success); }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .app-header {
    padding: 10px 14px;
  }
  .app-header h1 { font-size: 16px; }
  .container, .chat-main { padding: 12px; }
  .msg { max-width: 96%; padding: 12px 14px; }
  .composer { padding: 8px; }
  .admin-grid { grid-template-columns: 1fr 1fr; }
  .stat-card .value { font-size: 22px; }
}

@media (max-width: 380px) {
  .admin-grid { grid-template-columns: 1fr; }
}

/* ===== Spinner ===== */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--primary-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}