/* ============================================================
   style.css  – SiteKeeper メインスタイル
   ダーク / ライト テーマ対応
   ============================================================ */

/* ── ダークテーマ（デフォルト） ─────────────────────────── */
:root,
[data-theme="dark"] {
  --bg:       #0a0d14;
  --surface:  #111520;
  --surface2: #171d2e;
  --border:   #1e2640;
  --accent:   #4f8ef7;
  --accent2:  #7c5af7;
  --green:    #2dd4a0;
  --orange:   #f7924f;
  --red:      #f74f6a;
  --text:     #e8ecf5;
  --text2:    #7a85a3;
  --text3:    #3d4a6a;
  --radius:   12px;
  --shadow:   0 8px 32px rgba(0,0,0,.4);
  --input-bg: #0a0d14;
  --topbar-bg: rgba(10,13,20,.9);
  --auth-grid-color: #1e2640;
}

/* ── ライトテーマ ────────────────────────────────────────── */
[data-theme="light"] {
  --bg:       #f0f2f7;
  --surface:  #ffffff;
  --surface2: #f5f7fc;
  --border:   #dde1ee;
  --accent:   #3b7de8;
  --accent2:  #6b47e0;
  --green:    #17a884;
  --orange:   #e07830;
  --red:      #e03050;
  --text:     #1a1f35;
  --text2:    #5a6480;
  --text3:    #aab0c8;
  --radius:   12px;
  --shadow:   0 4px 20px rgba(0,0,0,.1);
  --input-bg: #f8f9fd;
  --topbar-bg: rgba(240,242,247,.92);
  --auth-grid-color: #dde1ee;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg); color: var(--text);
  min-height: 100vh;
  transition: background .25s, color .25s;
}

@keyframes fadeUp  { from { opacity:0; transform:translateY(20px) } to { opacity:1; transform:translateY(0) } }
@keyframes fadeIn  { from { opacity:0 } to { opacity:1 } }
@keyframes slideIn { from { transform:translateX(100%) } to { transform:translateX(0) } }
@keyframes spin    { to { transform:rotate(360deg) } }

/* ── AUTH ─────────────────────────────────────────────────── */
#auth-screen {
  display:flex; align-items:center; justify-content:center;
  min-height:100vh;
  background: radial-gradient(ellipse at 30% 50%, var(--surface2), var(--bg));
  position:relative; overflow:hidden;
}
#auth-screen::before {
  content:''; position:absolute; inset:0; opacity:.3;
  background:
    repeating-linear-gradient(0deg,   transparent, transparent 79px, var(--auth-grid-color) 79px, var(--auth-grid-color) 80px),
    repeating-linear-gradient(90deg,  transparent, transparent 79px, var(--auth-grid-color) 79px, var(--auth-grid-color) 80px);
}
.auth-card {
  background:var(--surface); border:1px solid var(--border); border-radius:20px;
  padding:48px; width:420px; position:relative; z-index:1;
  animation:fadeUp .5s ease; box-shadow:var(--shadow);
}
.auth-logo {
  font-family:'Syne',sans-serif; font-size:28px; font-weight:800;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text; -webkit-text-fill-color:transparent; margin-bottom:8px;
}
.auth-tagline { color:var(--text2); font-size:13px; margin-bottom:36px; }
.auth-tabs { display:flex; gap:4px; margin-bottom:28px; background:var(--bg); border-radius:8px; padding:4px; }
.auth-tab {
  flex:1; padding:8px; background:transparent; color:var(--text2);
  font-family:'Noto Sans JP',sans-serif; font-size:13px; cursor:pointer; border-radius:6px;
  transition:.2s; text-decoration:none; text-align:center; display:block; border:none;
}
.auth-tab.active { background:var(--surface2); color:var(--text); }

/* ── FORM ─────────────────────────────────────────────────── */
.form-group  { margin-bottom:16px; }
.form-label  { display:block; font-size:12px; color:var(--text2); margin-bottom:6px; font-weight:500; }
.form-input  {
  width:100%; padding:10px 14px; background:var(--input-bg); border:1px solid var(--border);
  border-radius:8px; color:var(--text); font-family:'Noto Sans JP',sans-serif; font-size:14px;
  transition:.2s; outline:none;
}
.form-input:focus { border-color:var(--accent); box-shadow:0 0 0 3px rgba(79,142,247,.15); }
.form-select {
  width:100%; padding:10px 14px; background:var(--input-bg); border:1px solid var(--border);
  border-radius:8px; color:var(--text); font-family:'Noto Sans JP',sans-serif; font-size:14px;
  outline:none; cursor:pointer; transition:.2s;
}
.form-select:focus { border-color:var(--accent); }
.form-textarea {
  width:100%; padding:10px 14px; background:var(--input-bg); border:1px solid var(--border);
  border-radius:8px; color:var(--text); font-family:'Noto Sans JP',sans-serif; font-size:14px;
  outline:none; resize:vertical; min-height:90px; transition:.2s;
}
.form-textarea:focus { border-color:var(--accent); }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.checkbox-group { display:flex; flex-direction:column; gap:8px; }
.checkbox-item  { display:flex; align-items:center; gap:8px; cursor:pointer; font-size:13px; }
.checkbox-item input { accent-color:var(--accent); width:14px; height:14px; }
.error-msg { color:var(--red); font-size:12px; margin-top:6px; }
.success-msg { color:var(--green); font-size:12px; margin-top:6px; }

/* ── BUTTONS ──────────────────────────────────────────────── */
.btn {
  padding:10px 20px; border:none; border-radius:8px;
  font-family:'Noto Sans JP',sans-serif; font-size:14px; cursor:pointer; transition:.2s; font-weight:500;
  display:inline-flex; align-items:center; justify-content:center; text-decoration:none; gap:6px;
}
.btn-primary  { background:linear-gradient(135deg,var(--accent),var(--accent2)); color:#fff; width:100%; padding:12px; }
.btn-primary:hover { opacity:.9; transform:translateY(-1px); }
.btn-secondary{ background:var(--surface2); color:var(--text); border:1px solid var(--border); }
.btn-secondary:hover { border-color:var(--accent); color:var(--accent); }
.btn-danger   { background:rgba(247,79,106,.12); color:var(--red); border:1px solid rgba(247,79,106,.3); }
.btn-green    { background:rgba(45,212,160,.12); color:var(--green); border:1px solid rgba(45,212,160,.3); }
.btn-sm       { padding:6px 12px; font-size:12px; }

/* ── LAYOUT ───────────────────────────────────────────────── */
#app   { display:flex; min-height:100vh; }
.sidebar {
  position:fixed; left:0; top:0; bottom:0; width:240px;
  background:var(--surface); border-right:1px solid var(--border);
  display:flex; flex-direction:column; z-index:100;
  transition:background .25s, border-color .25s;
  overflow: hidden; /* モバイルで閉じているとき内容を隠す */
}
.sidebar-logo {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.nav-section { padding:16px 12px 8px; }
.nav-label   { font-size:10px; color:var(--text3); font-weight:700; letter-spacing:.1em; text-transform:uppercase; padding:0 8px; margin-bottom:4px; }
.nav-item    {
  display:flex; align-items:center; gap:10px; padding:9px 12px; border-radius:8px;
  cursor:pointer; color:var(--text2); font-size:13px; transition:.15s; margin-bottom:2px;
  text-decoration:none;
}
.nav-item:hover  { background:var(--surface2); color:var(--text); }
.nav-item.active { background:rgba(79,142,247,.15); color:var(--accent); }
.nav-item .icon  { font-size:16px; width:20px; text-align:center; }
.nav-badge { margin-left:auto; background:var(--red); color:#fff; font-size:10px; padding:2px 6px; border-radius:99px; font-weight:700; }
.sidebar-bottom { margin-top:auto; padding:16px; border-top:1px solid var(--border); }
.user-chip       { display:flex; align-items:center; gap:10px; }
.user-avatar     {
  width:32px; height:32px; border-radius:50%; flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  display:flex; align-items:center; justify-content:center; font-size:13px; font-weight:700; color:#fff;
}
.user-info       { flex:1; overflow:hidden; }
.user-name-el    { font-size:13px; font-weight:500; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.user-role-el    { font-size:10px; color:var(--text2); }
.sidebar-actions { display:flex; gap:6px; align-items:center; }
.logout-btn      { background:none; border:none; color:var(--text3); cursor:pointer; font-size:16px; transition:.2s; text-decoration:none; padding:4px; border-radius:6px; }
.logout-btn:hover{ color:var(--red); background:rgba(247,79,106,.1); }

/* テーマトグルボタン */
.theme-toggle-btn {
  background:none; border:1px solid var(--border); color:var(--text2); cursor:pointer;
  font-size:14px; padding:4px 8px; border-radius:6px; transition:.2s; line-height:1;
}
.theme-toggle-btn:hover { border-color:var(--accent); color:var(--accent); }

.main  { margin-left:240px; min-height:100vh; flex:1; }
.topbar {
  position:sticky; top:0; z-index:50;
  background:var(--topbar-bg); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border); padding:0 24px; height:60px;
  display:flex; align-items:center; gap:12px;
  transition:background .25s;
}
.topbar-left {
  display:flex; align-items:center; gap:10px; flex:1; min-width:0; overflow:hidden;
}
.page-title {
  font-family:'Noto Sans JP',sans-serif; font-size:16px; font-weight:700;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.topbar-actions { display:flex; gap:8px; align-items:center; flex-shrink:0; }
.content       { padding:32px; animation:fadeUp .3s ease; }
/* チャット詳細ページ: chat-pageクラスは使用しない（シンプルな自然スクロールに戻す） */
.content.chat-page {
  padding-bottom: 32px;
}

/* ── STATS ────────────────────────────────────────────────── */
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:28px; }
.stat-card  { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:20px; transition:.25s; }
.stat-label { font-size:11px; color:var(--text2); text-transform:uppercase; letter-spacing:.08em; font-weight:600; margin-bottom:8px; }
.stat-value { font-family:'Syne',sans-serif; font-size:32px; font-weight:700; }
.stat-sub   { font-size:12px; color:var(--text2); margin-top:4px; }
.ca .stat-value { color:var(--accent); } .cg .stat-value { color:var(--green); }
.co .stat-value { color:var(--orange); } .cr .stat-value { color:var(--red); }

/* ── TASKS ────────────────────────────────────────────────── */
.section-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; }
.section-title  { font-family:'Syne',sans-serif; font-size:16px; font-weight:700; }
.filters        { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:16px; }
.filter-btn     {
  padding:5px 12px; border-radius:99px; font-size:12px; cursor:pointer;
  border:1px solid var(--border); background:transparent; color:var(--text2);
  transition:.15s; font-family:'Noto Sans JP',sans-serif; text-decoration:none; display:inline-block;
}
.filter-btn.active { border-color:var(--accent); color:var(--accent); background:rgba(79,142,247,.1); }
.task-list  { display:flex; flex-direction:column; gap:8px; }
.task-card  {
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:16px 20px; display:flex; align-items:center; gap:16px;
  transition:.2s; position:relative; overflow:hidden;
}
.task-card::before { content:''; position:absolute; left:0; top:0; bottom:0; width:3px; background:var(--accent); }
.ph::before { background:var(--red); } .pm::before { background:var(--orange); } .pl::before { background:var(--green); }
.task-card:hover { border-color:var(--accent); transform:translateX(2px); }
.task-card.is-done { opacity:.5; } .task-card.is-done .task-title { text-decoration:line-through; }
.task-check {
  width:20px; height:20px; border-radius:50%; border:2px solid var(--border); flex-shrink:0;
  background:none; cursor:pointer; display:flex; align-items:center; justify-content:center;
  transition:.2s; font-size:11px; color:transparent;
}
.task-check:hover { border-color:var(--green); }
.task-check.checked { background:var(--green); border-color:var(--green); color:#fff; }
.task-body  { flex:1; min-width:0; }
.task-title { font-size:14px; font-weight:500; margin-bottom:4px; }
.task-meta  { display:flex; gap:12px; align-items:center; flex-wrap:wrap; }
.tag        { font-size:11px; padding:2px 8px; border-radius:99px; background:rgba(79,142,247,.12); color:var(--accent); border:1px solid rgba(79,142,247,.2); }
.tag-client { background:rgba(124,90,247,.12); color:var(--accent2); border:1px solid rgba(124,90,247,.2); }
.tag-over   { background:rgba(247,79,106,.12); color:var(--red); border:1px solid rgba(247,79,106,.2); }
.task-due   { font-size:12px; color:var(--text2); }
.task-due.late { color:var(--red); }
.task-assignee { display:flex; align-items:center; gap:6px; margin-left:auto; }
.mini-avatar   {
  width:26px; height:26px; border-radius:50%; flex-shrink:0;
  background:linear-gradient(135deg,var(--accent2),var(--accent));
  display:flex; align-items:center; justify-content:center; font-size:10px; font-weight:700; color:#fff;
}

/* ── STATUS / ROLE PILLS ──────────────────────────────────── */
.status-pill { font-size:11px; padding:3px 10px; border-radius:99px; font-weight:600; display:inline-flex; align-items:center; }
.sn { background:rgba(79,142,247,.15);  color:var(--accent);  border:1px solid rgba(79,142,247,.25); }
.sp { background:rgba(247,146,79,.15);  color:var(--orange);  border:1px solid rgba(247,146,79,.25); }
.sd { background:rgba(45,212,160,.15);  color:var(--green);   border:1px solid rgba(45,212,160,.25); }
.sq { background:rgba(122,133,163,.15); color:var(--text2);   border:1px solid rgba(122,133,163,.2); }
.role-tag { font-size:10px; padding:2px 8px; border-radius:99px; margin-top:6px; display:inline-block; }
.rl { background:rgba(247,146,79,.15); color:var(--orange); border:1px solid rgba(247,146,79,.3); }
.rw { background:rgba(79,142,247,.15);  color:var(--accent);  border:1px solid rgba(79,142,247,.3); }
.rc { background:rgba(124,90,247,.15);  color:var(--accent2); border:1px solid rgba(124,90,247,.3); }

/* ── MEMBERS ──────────────────────────────────────────────── */
.members-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:16px; }
.member-card  {
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:20px; display:flex; align-items:center; gap:14px; transition:.2s;
}
.member-card:hover { transform:translateY(-2px); box-shadow:var(--shadow); }
.member-avatar-lg {
  width:48px; height:48px; border-radius:50%; flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  display:flex; align-items:center; justify-content:center; font-size:18px; font-weight:700; color:#fff;
}
.member-info  { flex:1; }
.member-name  { font-size:15px; font-weight:600; margin-bottom:2px; }
.member-email { font-size:12px; color:var(--text2); }

/* ── EMAIL LOG ────────────────────────────────────────────── */
.email-log    { display:flex; flex-direction:column; gap:8px; }
.email-item   { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:14px 16px; }
.email-subject{ font-size:13px; font-weight:600; margin-bottom:4px; }
.email-meta   { font-size:11px; color:var(--text2); }

/* ── SETTINGS PAGE ────────────────────────────────────────── */
.settings-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(320px,1fr)); gap:20px; }
.settings-card {
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:24px;
}
.settings-card-title { font-family:'Syne',sans-serif; font-size:14px; font-weight:700; margin-bottom:16px; display:flex; align-items:center; gap:8px; }

/* テーマ選択カード */
.theme-options { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.theme-option  {
  border:2px solid var(--border); border-radius:10px; padding:14px; cursor:pointer;
  transition:.2s; display:flex; flex-direction:column; gap:8px; align-items:center;
  background:var(--surface2);
}
.theme-option:hover   { border-color:var(--accent); }
.theme-option.selected{ border-color:var(--accent); background:rgba(79,142,247,.08); }
.theme-preview {
  width:100%; height:52px; border-radius:6px; border:1px solid var(--border);
  display:flex; overflow:hidden;
}
.theme-preview-sidebar { width:30%; background:#111520; }
.theme-preview-main    { flex:1; }
.theme-preview-topbar  { height:35%; background:#171d2e; border-bottom:1px solid #1e2640; }
.theme-preview-content { flex:1; background:#0a0d14; }
/* ライトプレビュー */
.theme-option[data-theme-val="light"] .theme-preview-sidebar { background:#fff; }
.theme-option[data-theme-val="light"] .theme-preview-main    { background:#f0f2f7; }
.theme-option[data-theme-val="light"] .theme-preview-topbar  { background:#fff; border-bottom:1px solid #dde1ee; }
.theme-option[data-theme-val="light"] .theme-preview-content { background:#f0f2f7; }
.theme-option-label { font-size:12px; font-weight:600; color:var(--text2); }

/* ── TOAST ────────────────────────────────────────────────── */
.toast-container { position:fixed; top:20px; right:20px; z-index:999; display:flex; flex-direction:column; gap:8px; pointer-events:none; }
.toast {
  background:var(--surface); border:1px solid var(--border); border-radius:10px;
  padding:12px 16px; display:flex; align-items:center; gap:10px; font-size:13px;
  min-width:280px; animation:slideIn .3s ease; box-shadow:var(--shadow);
  pointer-events:all;
}
.toast.success { border-left:3px solid var(--green); }
.toast.error   { border-left:3px solid var(--red); }
.toast.info    { border-left:3px solid var(--accent); }

/* ── CONFIRM OVERLAY ──────────────────────────────────────── */
.confirm-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,.6);
  display:flex; align-items:center; justify-content:center; z-index:300;
  animation:fadeIn .15s ease;
}
.confirm-box   { background:var(--surface); border:1px solid var(--border); border-radius:16px; padding:28px 32px; max-width:380px; width:90%; box-shadow:var(--shadow); }
.confirm-title { font-size:15px; font-weight:600; margin-bottom:8px; }
.confirm-msg   { font-size:13px; color:var(--text2); margin-bottom:24px; line-height:1.6; }
.confirm-btns  { display:flex; gap:8px; justify-content:flex-end; }

/* ── MISC ─────────────────────────────────────────────────── */
.divider  { height:1px; background:var(--border); margin:16px 0; }
.empty    { text-align:center; padding:60px 20px; color:var(--text2); }
.empty-icon { font-size:40px; margin-bottom:12px; opacity:.5; }
.empty-text { font-size:14px; }
.hidden   { display:none !important; }
.mt8      { margin-top:8px; }
.mt16     { margin-top:16px; }
.text-sm  { font-size:12px; color:var(--text2); }

/* ══════════════════════════════════════════════════════════
   レスポンシブ対応
═══════════════════════════════════════════════════════════ */

/* ── ハンバーガー・閉じるボタン ── */
.hamburger-btn {
  display: none;
  flex-direction: column; justify-content: center; align-items: center;
  gap: 5px; width: 36px; height: 36px; border-radius: 8px;
  background: none; border: 1px solid var(--border); cursor: pointer;
  padding: 0; flex-shrink: 0; transition: border-color .2s;
}
.hamburger-btn:hover { border-color: var(--accent); }
.hamburger-btn span {
  display: block; width: 18px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: transform .3s, opacity .3s;
  transform-origin: center;
}
/* X アニメーション：spanの間隔が5pxなのでtranslateYも5px */
.hamburger-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.sidebar-close-btn {
  display: none !important; /* デフォルトは完全非表示 */
  background: none; border: none; color: var(--text2); cursor: pointer;
  font-size: 18px; padding: 4px 8px; border-radius: 6px; line-height: 1;
  transition: color .2s, background .2s;
  flex-shrink: 0;
}
.sidebar-close-btn:hover { color: var(--text); background: var(--surface2); }

/* sidebar-logo-text スタイル */
.sidebar-logo-text {
  font-family: 'Noto Sans JP', sans-serif; font-size: 15px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.sidebar-logo-text span {
  display: block; font-size: 10px; color: var(--text3); -webkit-text-fill-color: var(--text3);
  font-weight: 400; font-family: 'Noto Sans JP', sans-serif; margin-top: 2px;
}

/* オーバーレイ */
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.5); z-index: 99;
  opacity: 0; transition: opacity .25s;
  pointer-events: none; /* 常にクリック無効、visibleで有効化 */
}
.sidebar-overlay.visible {
  opacity: 1;
  pointer-events: all;
}

/* ── タブレット（769〜1024px）：サイドバー縮小 ── */
@media (max-width: 1024px) and (min-width: 769px) {
  .sidebar {
    width: 64px;
    transition: width .25s, background .25s, border-color .25s;
    overflow: hidden;
  }
  .sidebar:hover { width: 240px; z-index: 200; box-shadow: 4px 0 24px rgba(0,0,0,.2); }
  .sidebar-logo { padding: 24px 20px; }
  .sidebar-logo-text { opacity: 0; white-space: nowrap; transition: opacity .2s; }
  .sidebar:hover .sidebar-logo-text { opacity: 1; }
  .nav-label  { opacity: 0; transition: opacity .2s; white-space: nowrap; }
  .sidebar:hover .nav-label { opacity: 1; }
  .nav-item   { padding: 10px; justify-content: center; white-space: nowrap; overflow: hidden; }
  .sidebar:hover .nav-item { padding: 9px 12px; justify-content: flex-start; }
  .nav-item .icon { width: auto; flex-shrink: 0; }
  .nav-item > *:not(.icon):not(.nav-badge) { opacity: 0; max-width: 0; overflow: hidden; transition: opacity .2s, max-width .2s; }
  .sidebar:hover .nav-item > *:not(.icon):not(.nav-badge) { opacity: 1; max-width: 200px; }
  .nav-badge  { display: none; }
  .sidebar:hover .nav-badge { display: inline-block; }
  .user-info, .sidebar-actions { opacity: 0; overflow: hidden; max-width: 0; transition: opacity .2s; }
  .sidebar:hover .user-info, .sidebar:hover .sidebar-actions { opacity: 1; max-width: 200px; }
  .main { margin-left: 64px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row   { grid-template-columns: 1fr; }
}

/* ── モバイル（〜768px）：フルオーバーレイサイドバー ── */
@media (max-width: 768px) {
  /* サイドバー */
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    transition: transform .25s ease, background .25s, border-color .25s;
    z-index: 300;
    box-shadow: none;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 8px 0 32px rgba(0,0,0,.3);
  }
  .sidebar-overlay {
    display: block;           /* 常にDOMに存在させる */
    pointer-events: none;     /* 閉じているときはタップ無効 */
  }
  .sidebar-overlay.visible { pointer-events: all; } /* 開いたときだけ有効 */
  .sidebar-close-btn { display: block !important; } /* モバイルのみ表示 */
  .hamburger-btn     { display: flex; }
  .main              { margin-left: 0; }

  /* トップバー */
  .topbar { padding: 0 12px; height: 54px; gap: 8px; }
  .page-title { font-size: 15px; }
  /* モバイルでtopbar-actionsを非表示（ボトムナビで代替） */
  .topbar-actions { display: none; }

  /* FABボタン（モバイル専用：画面右下の浮きボタン） */
  .fab-btn {
    display: flex;
    position: fixed; bottom: 72px; right: 16px; z-index: 150;
    width: 52px; height: 52px; border-radius: 50%;
    background: var(--accent); color: #fff; border: none;
    font-size: 24px; font-weight: 700;
    align-items: center; justify-content: center;
    box-shadow: 0 4px 16px rgba(79,142,247,.5);
    cursor: pointer; text-decoration: none;
    transition: transform .15s, box-shadow .15s;
  }
  .fab-btn:active { transform: scale(.92); }
  .fab-btn:hover  { box-shadow: 0 6px 20px rgba(79,142,247,.6); }

  /* コンテンツ */
  .content { padding: 16px; }

  /* グリッド系 */
  .stats-grid    { grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }
  .form-row      { grid-template-columns: 1fr; }
  .members-grid  { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
  .theme-options { grid-template-columns: 1fr; }
  .flow-stats-row { grid-template-columns: repeat(3, 1fr) !important; gap: 8px !important; }

  /* タスクカード */
  .task-card   { padding: 12px 14px; }
  .task-title  { font-size: 13px; }
  .task-meta   { flex-wrap: wrap; gap: 5px; }
  .task-assignee { display: none; }

  /* タスク詳細チャット（モバイルのみ） */
  .task-detail-layout { grid-template-columns: 1fr; gap: 12px; }
  .task-info-panel { order: -1; }
  .info-card { padding: 12px; }
  .chat-area { min-height: 0; }
  .chat-messages { max-height: 45vh; min-height: 200px; }
  .chat-header { padding: 14px 14px 12px; }
  .chat-bubble { max-width: 85%; }
  .chat-input-row { padding: 8px 10px 10px; }
  .chat-notify-panel { padding: 8px 12px 10px; }
  .chat-attach-area  { padding: 8px 10px 0; }

  /* フロー操作ボタン */
  .chat-flow-panel { padding: 8px 12px 0; }
  .flow-op-btn { font-size: 11px; padding: 3px 10px; }

  /* フォーム */
  .form-input, .form-textarea, .form-select { font-size: 16px; } /* iOS zoom防止 */
  .chat-textarea { font-size: 16px; } /* iOS zoom防止 */

  /* stat-card 縮小 */
  .stat-card { padding: 14px; }
  .stat-card .stat-num { font-size: 24px !important; }
  .stat-card .stat-label { font-size: 10px; }
  .flow-stat-num { font-size: 30px !important; }
  .flow-stat-icon { font-size: 18px !important; }
  .flow-stat-card { min-height: 85px; padding: 12px 6px 10px; }

  /* フィルターバー横スクロール */
  .filters { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .filter-btn { white-space: nowrap; flex-shrink: 0; }

  /* ワークフローステッパー縮小 */
  .workflow-stepper { gap: 0; }
  .step-label { font-size: 9px !important; }
  .step-circle { width: 26px !important; height: 26px !important; font-size: 10px !important; }

  /* ユーザー一覧 */
  .user-list-card { flex-direction: column; align-items: flex-start; gap: 10px; }

  /* ボタン */
  .btn { font-size: 12px; }
  .btn-sm { padding: 5px 10px; }

  /* テーブル・メール履歴 */
  .email-log-item { flex-direction: column; gap: 6px; padding: 12px; }

  /* topbar actions */
  .topbar-actions .btn-primary { font-size: 12px; padding: 6px 12px; }
}

/* 極小画面（〜400px） */
@media (max-width: 400px) {
  .stats-grid { grid-template-columns: 1fr; }
  .flow-stats-row { grid-template-columns: repeat(2, 1fr) !important; }
  .chat-bubble { max-width: 92%; }
}

/* ── FILE UPLOAD ──────────────────────────────────────────── */
.file-drop-area {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 28px 20px; text-align: center; transition: .2s; cursor: default;
  background: var(--surface2);
}
.file-drop-area.drag-over {
  border-color: var(--accent); background: rgba(79,142,247,.08);
}
.file-drop-icon { font-size: 32px; margin-bottom: 8px; }
.file-drop-text { font-size: 13px; color: var(--text2); margin-bottom: 8px; line-height: 1.7; }

.file-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px;
  transition: .15s;
}
.file-item:hover { border-color: var(--accent); }
.file-item-icon  { font-size: 20px; flex-shrink: 0; }
.file-item-info  { flex: 1; min-width: 0; }
.file-item-name  { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-item-meta  { font-size: 11px; color: var(--text2); margin-top: 2px; }
.file-item-remove {
  background: none; border: none; color: var(--text3); cursor: pointer;
  font-size: 16px; padding: 2px 6px; border-radius: 4px; transition: .15s; flex-shrink: 0;
}
.file-item-remove:hover { color: var(--red); background: rgba(247,79,106,.1); }

/* ── UPLOAD PROGRESS ──────────────────────────────────────── */
.upload-progress-wrap {
  display: none; margin-top: 12px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px;
}
.upload-progress-wrap.active { display: block; }
.upload-progress-label {
  font-size: 12px; color: var(--text2); margin-bottom: 8px;
  display: flex; justify-content: space-between;
}
.upload-progress-bar-bg {
  height: 6px; background: var(--border); border-radius: 99px; overflow: hidden;
}
.upload-progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 99px; transition: width .2s;
}
.upload-progress-status {
  font-size: 11px; color: var(--text3); margin-top: 6px; text-align: right;
}

/* ── WORKFLOW STEPPER ─────────────────────────────────────── */
.workflow-stepper {
  display: flex; align-items: center; gap: 0;
  margin: 20px 0; overflow-x: auto; padding-bottom: 4px;
}
.workflow-step {
  display: flex; flex-direction: column; align-items: center;
  flex: 1; min-width: 80px; position: relative;
}
.workflow-step:not(:last-child)::after {
  content: ''; position: absolute;
  top: 14px; left: calc(50% + 16px); right: calc(-50% + 16px);
  height: 2px; background: var(--border); z-index: 0;
}
.workflow-step.done-line:not(:last-child)::after { background: var(--accent); }
.step-circle {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; z-index: 1;
  border: 2px solid var(--border); background: var(--surface2); color: var(--text3);
  transition: .2s;
}
.workflow-step.current .step-circle {
  border-color: var(--accent); background: var(--accent); color: #fff;
  box-shadow: 0 0 0 4px rgba(79,142,247,.2);
}
.workflow-step.past .step-circle {
  border-color: var(--green); background: var(--green); color: #fff;
}
.step-label {
  font-size: 10px; margin-top: 6px; color: var(--text3);
  text-align: center; white-space: nowrap;
}
.workflow-step.current .step-label { color: var(--accent); font-weight: 600; }
.workflow-step.past   .step-label  { color: var(--green); }

/* フロー遷移ボタン */
.workflow-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.btn-next-step {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; border: none;
}
.btn-next-step:hover { opacity: .9; transform: translateY(-1px); }

/* ── 新ワークフロー STATUS PILLS ──────────────────────────── */
.s-new        { background:rgba(122,133,163,.15); color:var(--text2);   border:1px solid rgba(122,133,163,.25); }
.s-confirmed  { background:rgba(79,142,247,.15);  color:var(--accent);  border:1px solid rgba(79,142,247,.25); }
.s-progress   { background:rgba(247,146,79,.15);  color:var(--orange);  border:1px solid rgba(247,146,79,.25); }
.s-reviewing  { background:rgba(124,90,247,.15);  color:var(--accent2); border:1px solid rgba(124,90,247,.25); }
.s-done       { background:rgba(45,212,160,.15);  color:var(--green);   border:1px solid rgba(45,212,160,.25); }

/* ── 新ロールタグ ─────────────────────────────────────────── */
.r-admin   { background:rgba(247,79,106,.12); color:var(--red);    border:1px solid rgba(247,79,106,.3); }
.r-manager { background:rgba(247,146,79,.12); color:var(--orange); border:1px solid rgba(247,146,79,.3); }
.r-client  { background:rgba(124,90,247,.12); color:var(--accent2);border:1px solid rgba(124,90,247,.3); }
.r-worker  { background:rgba(79,142,247,.12); color:var(--accent); border:1px solid rgba(79,142,247,.3); }

/* ── フロー別カウンター（ダッシュボード）────────────────── */
.flow-stats-row {
  display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 28px;
}
.flow-stat-card {
  flex: 1; min-width: 90px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 10px 16px;
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  transition: border-color .2s, transform .15s, box-shadow .2s;
  cursor: pointer; min-height: 110px;
}
.flow-stat-card:hover {
  border-color: var(--accent); transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(79,142,247,.12);
}
.flow-stat-icon { font-size: 20px; line-height: 1; margin-bottom: 4px; }
.flow-stat-num  {
  font-family: 'Oswald', 'Arial Narrow', sans-serif;
  font-size: 44px;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums lining-nums;
}
.flow-stat-num.has-count { color: var(--accent); }
.flow-stat-num.overdue-num { color: var(--red); }
.flow-stat-label {
  font-size: 11px; color: var(--text2); text-align: center;
  white-space: nowrap; margin-top: 6px; font-weight: 500;
  font-family: 'Noto Sans JP', sans-serif;
}

.flow-all            { border-top: 3px solid var(--border); }
.s-new-card          { border-top: 3px solid rgba(122,133,163,.6); }
.s-progress-card     { border-top: 3px solid var(--orange); }
.s-reviewing-card    { border-top: 3px solid var(--accent2); }
.s-done-card         { border-top: 3px solid var(--green); }
.overdue-card        { border-top: 3px solid var(--red); }
.flow-all:hover      { border-color: var(--accent); border-top-color: var(--accent); }

/* ── ユーザー一覧カード ──────────────────────────────────── */
.user-list-card {
  display: flex; align-items: center; gap: 14px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px;
  transition: border-color .2s;
}
.user-list-card:hover { border-color: var(--accent2); }
.user-list-avatar {
  width: 40px; height: 40px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700; color: #fff;
}
.user-list-info { flex: 1; min-width: 0; }

/* ══════════════════════════════════════════════════════════
   タスク詳細 チャット統合レイアウト
═══════════════════════════════════════════════════════════ */
.task-detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px;
  align-items: start;
}

/* ── チャットエリア ── */
.chat-area {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.chat-header {
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
}
.chat-messages {
  padding: 16px 16px 8px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 420px;
  min-height: 200px;
}
.chat-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.chat-msg.mine {
  flex-direction: row-reverse;
}
.chat-avatar {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: #fff;
}
.chat-bubble {
  max-width: 72%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 12px 12px 12px 3px;
  padding: 10px 13px;
}
.chat-msg.mine .chat-bubble {
  background: rgba(79,142,247,.12);
  border-color: rgba(79,142,247,.25);
  border-radius: 12px 12px 3px 12px;
}
.flow-bubble {
  background: rgba(164,110,247,.08) !important;
  border-color: rgba(164,110,247,.3) !important;
}
.chat-meta {
  display: flex; gap: 6px; align-items: baseline; margin-bottom: 4px;
}
.chat-name { font-size: 11px; font-weight: 700; color: var(--text); }
.chat-time { font-size: 10px; color: var(--text3); }
.chat-body { font-size: 13px; line-height: 1.65; color: var(--text); word-break: break-word; }

/* フロー変更イベント */
.chat-flow-event {
  display: flex; align-items: center; gap: 8px; margin: 4px 0;
}
.chat-flow-line { flex: 1; height: 1px; background: var(--border); }
.chat-flow-badge {
  display: flex; align-items: center; gap: 6px; flex-shrink: 0;
  font-size: 11px;
}

/* システムメッセージ */
.chat-msg-system {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; font-size: 12px;
}

/* ── 入力エリア ── */
.chat-input-area {
  border-top: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0; /* 入力エリアを縮めない */
  position: relative;
  z-index: 1;
}
.chat-flow-panel {
  padding: 10px 14px 0;
}
.flow-op-btn {
  display: inline-flex; align-items: center;
  border: 1px solid var(--border); border-radius: 99px;
  padding: 4px 12px; font-size: 12px; cursor: pointer;
  transition: border-color .2s, background .2s; user-select: none;
  color: var(--text2);
}
.flow-op-btn:has(.flow-op-radio:checked),
.flow-op-btn.selected {
  border-color: var(--accent); background: rgba(79,142,247,.1); color: var(--accent); font-weight: 600;
}
.flow-op-btn.revert:has(.flow-op-radio:checked) {
  border-color: var(--red); background: rgba(247,79,106,.08); color: var(--red);
}
.flow-op-btn.none-btn:has(.flow-op-radio:checked) {
  border-color: var(--border); background: var(--surface2); color: var(--text2);
}
.chat-notify-panel {
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}
.chat-input-row {
  display: flex; align-items: flex-end; gap: 8px; padding: 10px 12px 12px;
}
.chat-attach-btn {
  width: 34px; height: 34px; flex-shrink: 0; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface2);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; cursor: pointer; transition: border-color .2s;
}
.chat-attach-btn:hover { border-color: var(--accent); }
.chat-textarea {
  flex: 1; border: 1px solid var(--border); border-radius: 18px;
  padding: 8px 14px; font-size: 13px; resize: none;
  background: var(--surface2); color: var(--text);
  outline: none; line-height: 1.5; max-height: 140px; overflow-y: auto;
  font-family: inherit; transition: border-color .2s;
}
.chat-textarea:focus { border-color: var(--accent); }
.chat-notify-btn {
  width: 34px; height: 34px; flex-shrink: 0; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface2);
  font-size: 16px; cursor: pointer; transition: border-color .2s, background .2s;
  display: flex; align-items: center; justify-content: center;
}
.chat-notify-btn.active { border-color: var(--accent); background: rgba(79,142,247,.12); }
.chat-send-btn {
  width: 36px; height: 36px; flex-shrink: 0; border-radius: 50%;
  background: var(--accent); border: none; color: #fff;
  font-size: 18px; cursor: pointer; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  transition: opacity .2s;
}
.chat-send-btn:hover { opacity: .85; }

/* ── 右パネル ── */
.task-info-panel {
  display: flex; flex-direction: column; gap: 14px;
}
.info-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.info-card-title {
  font-size: 11px; color: var(--text2); font-weight: 700;
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: 12px;
}
.info-row {
  display: flex; gap: 8px; font-size: 13px; margin-bottom: 8px;
  align-items: flex-start;
}
.info-label { color: var(--text3); font-size: 11px; min-width: 52px; padding-top: 1px; }
.info-val   { flex: 1; color: var(--text); word-break: break-word; }

/* ── チャット入力エリア追加スタイル ─────────────────────── */
.chat-notify-panel {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--border);
}
.chat-attach-area {
  padding: 10px 12px 0;
}
.chat-attach-drop {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  border: 1.5px dashed var(--border); border-radius: 8px;
  padding: 10px 14px; cursor: pointer;
  transition: border-color .2s, background .2s;
  background: var(--surface2);
}
.chat-attach-drop:hover,
.chat-attach-drop.drag-over {
  border-color: var(--accent); background: rgba(79,142,247,.06);
}

/* ── モバイル：情報パネル折りたたみ ──────────────────────── */
@media (max-width: 768px) {
  .info-card-collapsible .info-card-body {
    display: none;
  }
  .info-card-collapsible.expanded .info-card-body {
    display: block;
  }
  .info-card-title-toggle {
    display: flex; align-items: center; justify-content: space-between;
    cursor: pointer; user-select: none;
  }
  .info-card-title-toggle::after {
    content: '▼'; font-size: 9px; color: var(--text3); transition: transform .2s;
  }
  .info-card-collapsible.expanded .info-card-title-toggle::after {
    transform: rotate(180deg);
  }
}
@media (min-width: 769px) {
  .info-card-title-toggle { pointer-events: none; }
  .info-card-title-toggle::after { display: none; }
}

/* ══════════════════════════════════════════════════════════
   ボトムナビゲーション（スマホ専用）
═══════════════════════════════════════════════════════════ */
.bottom-nav {
  display: none;
}
/* FABはモバイル専用（デフォルト非表示） */
.fab-btn { display: none; }
.mobile-app-title   { display: none; }   /* PC: 非表示 */
.desktop-page-title { display: block; }  /* PC: 表示 */

/* topbar構造はベーススタイル参照 */

@media (max-width: 768px) {
  /* ヘッダータイトル切り替え */
  .desktop-page-title { display: none; }
  .mobile-app-title   {
    display: block;
    font-family: 'Noto Sans JP', sans-serif; font-size: 15px; font-weight: 700;
    color: var(--text);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }

  /* ボトムナビ表示 */
  .bottom-nav {
    display: flex;
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 200;
    background: var(--surface);
    border-top: 1px solid var(--border);
    height: 60px;
    backdrop-filter: blur(10px);
  }
  .bottom-nav-item {
    flex: 1; display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    gap: 2px; text-decoration: none;
    color: var(--text3); font-size: 10px; font-weight: 500;
    position: relative; transition: color .15s;
    padding: 6px 0;
  }
  .bottom-nav-item.active { color: var(--accent); }
  .bottom-nav-item:active { background: var(--surface2); }
  .bottom-nav-icon { font-size: 20px; line-height: 1; }
  .bottom-nav-badge {
    position: absolute; top: 4px; right: calc(50% - 18px);
    background: var(--red); color: #fff;
    font-size: 9px; font-weight: 700; min-width: 16px; height: 16px;
    border-radius: 99px; display: flex; align-items: center; justify-content: center;
    padding: 0 4px; border: 2px solid var(--surface);
  }

  /* ボトムナビ分のpadding */
  .main { padding-bottom: 60px; }
  body  { padding-bottom: 0; }

  /* コンテンツが隠れないよう */
  .chat-input-area { padding-bottom: env(safe-area-inset-bottom, 0); }
}

/* ── ユーザー一覧レイアウト ───────────────────────────────── */
.users-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 24px;
  align-items: start;
}
@media (max-width: 860px) {
  .users-layout {
    grid-template-columns: 1fr;   /* 縦積みに変更 */
  }
  /* モバイルではメール送信パネルを上に */
  .users-layout .users-mail-panel {
    order: -1;
  }
}

@media (max-width: 860px) {
  .users-mail-panel {
    position: static !important; /* モバイルでstickyを解除 */
  }
}

/* ── JS無効画面 ───────────────────────────────────────────── */
.noscript-screen {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg, #f0f2f5);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.noscript-card {
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e0e0e0);
  border-radius: 16px; padding: 40px 32px;
  text-align: center; max-width: 400px; width: 100%;
  box-shadow: 0 8px 40px rgba(0,0,0,.12);
}

/* ── ローディングオーバーレイ ────────────────────────────── */
#loading-overlay {
  position: fixed; inset: 0; z-index: 1500;
  background: rgba(0,0,0,.55);
  align-items: center; justify-content: center;
  flex-direction: column; gap: 16px;
}
#loading-overlay.active { display: flex !important; }
.loading-spinner {
  width: 48px; height: 48px;
  border: 4px solid rgba(255,255,255,.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
  color: #fff; font-size: 14px; font-weight: 600;
  letter-spacing: .03em;
}