/* ======================================
   だれでもぽーたる 共通CSS
   Design System: Warm Professionalism
   ====================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@600;700&display=swap');

/* ---- CSS変数（Monotoneデザインシステム） ---- */
:root {
  /* テナントカラーパレット（上書き可） */
  --c-base:    #888888;
  --c-main:    #d4d4d4;
  --c-accent:  #3d3d3d;
  --c-sub:     #efefef;

  --c-accent-dark:  #303030;
  --c-accent-light: #818181;

  /* セマンティックカラー */
  --c-body-bg:      #ffffff;
  --c-card-bg:      #ffffff;
  --c-border:       #cccccc;
  --c-border-light: #e5e5e5;
  --c-surface:      #f5f5f5;

  --c-text:        #111111;
  --c-text-muted:  #6b6b6b;
  --c-text-white:  #ffffff;
  --c-outline:     #3d3d3d;

  /* ステータスカラー */
  --c-success: #22c55e;
  --c-danger:  #ba1a1a;
  --c-warning: #f59e0b;
  --c-info:    #3d3d3d;

  /* 形状 */
  --radius:    8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* シャドウ */
  --shadow:    0px 4px 20px rgba(0, 0, 0, 0.10);
  --shadow-lg: 0px 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-sm: 0px 2px 8px rgba(0, 0, 0, 0.08);

  --transition: .18s ease;
}

/* ---- リセット ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  background: var(--c-body-bg);
  color: var(--c-text);
  line-height: 1.6;
}
a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: 'Plus Jakarta Sans', 'Noto Sans JP', sans-serif;
  font-weight: 700;
}

/* ---- ボタン ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  font-size: .9rem;
  font-weight: 600;
  font-family: 'Plus Jakarta Sans', sans-serif;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition);
  white-space: nowrap;
  text-decoration: none;
  letter-spacing: .01em;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus:not(:focus-visible) { outline: none; }
.btn:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--c-accent);
  color: var(--c-text-white);
  border-color: var(--c-accent);
  box-shadow: 0 2px 8px rgba(31, 68, 147, 0.25);
}
.btn-primary:hover {
  background: var(--c-accent-dark);
  border-color: var(--c-accent-dark);
  box-shadow: 0 4px 14px rgba(31, 68, 147, 0.35);
  text-decoration: none;
}

.btn-secondary {
  background: #fff;
  color: var(--c-accent);
  border-color: var(--c-accent);
}
.btn-secondary:hover {
  background: var(--c-accent-light);
  border-color: var(--c-accent);
  text-decoration: none;
}

.btn-danger {
  background: var(--c-danger);
  color: #fff;
  border-color: var(--c-danger);
}
.btn-danger:hover {
  background: #93000a;
  border-color: #93000a;
  text-decoration: none;
}

.btn-warning {
  background: var(--c-sub);
  color: #554500;
  border-color: var(--c-sub);
}
.btn-warning:hover {
  background: #eac300;
  border-color: #eac300;
  text-decoration: none;
}

.btn-sm { padding: 5px 14px; font-size: .82rem; }
.btn-lg { padding: 12px 28px; font-size: 1rem; }

.btn-ghost {
  background: transparent;
  color: var(--c-accent);
  border-color: transparent;
  padding: 5px 10px;
  box-shadow: none;
}
.btn-ghost:hover {
  background: var(--c-accent-light);
  text-decoration: none;
  transform: none;
}

/* ---- カード ---- */
.card {
  background: var(--c-card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transition: box-shadow var(--transition);
}
.card-header {
  padding: 16px 24px;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-header h2, .card-header h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-accent-dark);
  font-family: 'Plus Jakarta Sans', sans-serif;
}
.card-body { padding: 24px; }
.mb-3 { margin-bottom: 24px; }

/* ---- フォーム ---- */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 6px;
  font-family: 'Plus Jakarta Sans', sans-serif;
}
.form-label .required {
  color: var(--c-danger);
  margin-left: 3px;
  font-size: .75rem;
}
.form-control {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius);
  font-size: .9rem;
  font-family: inherit;
  background: #fff;
  color: var(--c-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(31, 68, 147, 0.12);
}
.form-control:read-only { background: var(--c-surface); color: var(--c-text-muted); }
.form-hint { font-size: .78rem; color: var(--c-text-muted); margin-top: 5px; }
select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 100px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

/* ---- テーブル ---- */
.table-wrapper { overflow-x: scroll; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.table th {
  background: var(--c-surface);
  color: var(--c-accent-dark);
  font-weight: 700;
  font-family: 'Plus Jakarta Sans', sans-serif;
  padding: 11px 16px;
  text-align: left;
  border-bottom: 2px solid var(--c-border);
  white-space: nowrap;
}
.table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--c-border-light);
  vertical-align: middle;
  white-space: nowrap;
}
.table tbody tr:hover { background: var(--c-surface); }
.sort-link { color: var(--c-accent-dark); text-decoration: none; }
.sort-link:hover { text-decoration: underline; }
.table .actions { display: flex; gap: 6px; align-items: center; }

/* ---- ログ管理テーブル ---- */
.log-table th,
.log-table td {
  padding: 13px 20px;
  border-right: 1px solid var(--c-border-light);
}
.log-table th:last-child,
.log-table td:last-child { border-right: none; }
.log-table thead th { border-bottom: 2px solid var(--c-border); }
.log-table tbody td { border-bottom: 1px solid var(--c-border-light); }

/* ---- バッジ ---- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: .72rem;
  font-weight: 700;
  font-family: 'Plus Jakarta Sans', sans-serif;
  letter-spacing: .02em;
}
.badge-success { background: #dcfce7; color: #166534; }
.badge-danger  { background: #ffdad6; color: #93000a; }
.badge-warning { background: #fef9c3; color: #713f12; }
.badge-info    { background: #dbeafe; color: #1e40af; }
.badge-neutral { background: var(--c-border-light); color: var(--c-text-muted); }
.badge-admin      { background: #fce7f3; color: #831843; }
.badge-instructor { background: var(--c-main); color: #713f12; }
.badge-student    { background: var(--c-accent-light); color: var(--c-accent-dark); }

/* ---- トグルスイッチ ---- */
.toggle {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 26px;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--c-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px; height: 20px;
  left: 3px; top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
}
.toggle input:checked + .toggle-slider { background: var(--c-accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ---- モーダル ---- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(25, 28, 29, .5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
}
@keyframes _modal-overlay-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes _modal-dialog-in {
  from { opacity: 0; transform: scale(.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1)   translateY(0); }
}
.modal-overlay.open {
  display: flex;
  animation: _modal-overlay-in .18s ease both;
}
.modal-overlay.open .modal {
  animation: _modal-dialog-in .22s cubic-bezier(.16, 1, .3, 1) both;
}
.modal {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}
.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--c-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--c-surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.modal-header h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-accent-dark);
  font-family: 'Plus Jakarta Sans', sans-serif;
}
.modal-close {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--c-text-muted);
  line-height: 1;
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { color: var(--c-text); background: var(--c-border-light); }
.modal-body { padding: 24px; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--c-border-light);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ---- プロフィールカードボタン ---- */
.profile-card-btn {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  color: inherit;
  font: inherit;
  cursor: pointer;
  text-decoration: underline dotted;
  text-underline-offset: 2px;
  white-space: nowrap;
}
.profile-card-btn:hover { color: var(--c-accent); text-decoration: underline; }

/* 一覧での投稿者ピルバッジ（ナレッジ一覧など） */
.author-pill {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 8px;
  border: 1.5px solid var(--c-border);
  background: var(--c-bg-alt);
  color: var(--c-text-muted);
  font-size: .82rem;
  text-decoration: none;
  transition: filter .15s, opacity .15s;
}
.author-pill:hover { filter: brightness(.93); opacity: .9; text-decoration: none; }

/* ---- アラート ---- */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: .9rem;
  border-left: 4px solid transparent;
}
.alert-success { background: #dcfce7; border-color: var(--c-success); color: #166534; }
.alert-danger  { background: #ffdad6; border-color: var(--c-danger);  color: #93000a; }
.alert-warning { background: #fef9c3; border-color: var(--c-warning); color: #713f12; }
.alert-info    { background: #dbeafe; border-color: var(--c-info);    color: #1e40af; }

/* ---- カラースウォッチ ---- */
.palette-preview { display: flex; gap: 4px; }
.swatch {
  width: 28px; height: 28px;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,.1);
  display: inline-block;
  flex-shrink: 0;
}
.swatch-lg {
  width: 48px; height: 48px;
  border-radius: 10px;
  border: 1px solid rgba(0,0,0,.12);
}

/* ---- ページネーション ---- */
.pagination {
  display: flex;
  gap: 4px;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
}
.page-item {
  display: inline-block;
  padding: 6px 12px;
  border-radius: var(--radius);
  border: 1.5px solid var(--c-border);
  font-size: .85rem;
  cursor: pointer;
  color: var(--c-accent);
  background: #fff;
  transition: all var(--transition);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
}
.page-item:hover { background: var(--c-accent-light); border-color: var(--c-accent); }
.page-item.active {
  background: var(--c-accent);
  color: #fff;
  border-color: var(--c-accent);
}
.page-item.disabled { color: var(--c-border); cursor: default; pointer-events: none; }

/* ---- なりすましバナー ---- */
.masquerade-banner {
  background: #fef9c3;
  border-bottom: 2px solid var(--c-warning);
  padding: 8px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: .88rem;
  font-weight: 600;
  color: #713f12;
}
.masquerade-banner .info { display: flex; align-items: center; gap: 8px; }
.masquerade-icon { font-size: 1.1rem; }

/* ---- 空状態 ---- */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--c-text-muted);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: 12px; opacity: .4; }
.empty-state-text { font-size: .95rem; }

/* ---- ユーティリティ ---- */
.td-primary    { font-weight: 600; }
.text-muted    { color: var(--c-text-muted); }
.text-danger   { color: var(--c-danger); }
.text-success  { color: var(--c-success); }
.text-center   { text-align: center; }
.text-accent   { color: var(--c-accent); }
.text-xs2  { font-size: .75rem; }
.text-xs   { font-size: .82rem; }
.text-sm   { font-size: .85rem; }
.text-base { font-size: .9rem; }
.text-sm-muted { font-size: .85rem; color: var(--c-text-muted); }
.text-xs-muted { font-size: .82rem; color: var(--c-text-muted); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.nowrap { white-space: nowrap; }
.d-none   { display: none; }
.d-flex   { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-end { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.align-center { align-items: center; }
.align-end    { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-end    { justify-content: flex-end; }
.mt-1 { margin-top: 6px; }
.mt-2 { margin-top: 12px; }
.mt-3 { margin-top: 20px; }
.mt-4 { margin-top: 4px; }
.mt-6 { margin-top: 6px; }
.mt-8 { margin-top: 8px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 6px; }
.mb-2 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 4px; }
.mb-6 { margin-bottom: 6px; }
.mb-8 { margin-bottom: 8px; }
.gap-2 { gap: 8px; }
.gap-4  { gap: 4px; }
.gap-6  { gap: 6px; }
.gap-8  { gap: 8px; }
.gap-10 { gap: 10px; }
.gap-12 { gap: 12px; }

/* ---- Quill.jsプレースホルダー ---- */
.quill-placeholder {
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius);
  background: #fff;
}
.quill-toolbar {
  border-bottom: 1px solid var(--c-border-light);
  padding: 8px 12px;
  display: flex; gap: 6px; flex-wrap: wrap;
  background: var(--c-surface);
  border-radius: var(--radius) var(--radius) 0 0;
}
.quill-toolbar button {
  padding: 3px 8px;
  border: 1px solid var(--c-border);
  border-radius: 4px;
  background: #fff; font-size: .78rem;
  cursor: pointer; color: var(--c-text);
}
.quill-toolbar button:hover { background: var(--c-accent-light); color: var(--c-accent-dark); }
.quill-editor {
  min-height: 160px; padding: 12px;
  font-size: .9rem; color: var(--c-text);
  outline: none;
  border-radius: 0 0 var(--radius) var(--radius);
}