/* ═══════════════════════════════════════════════════
   CSS 변수 — 다크 테마 (기본)
═══════════════════════════════════════════════════ */
:root {
  --bg:          #0f1117;
  --sidebar-bg:  #151a26;
  --panel-bg:    #1a2030;
  --hover-bg:    #1e2840;
  --active-bg:   #1b3358;
  --border:      #2a3350;
  --text1:       #e8eaf0;
  --text2:       #7a8099;
  --accent:      #4f8ef7;
  --accent-h:    #3a7de0;
  --danger:      #e05050;
  --success:     #34c774;
  --warning:     #f0a030;
  --input-bg:    #141824;
  --msg-unread:  #1e2a44;
  --msg-sel:     #1a3a60;
  --msg-current: #1b3358;
  --read-bg:     #13192a;
  --shadow:      0 2px 12px rgba(0,0,0,.5);
  --radius:      8px;
  --header-h:    52px;
  --sidebar-w:   220px;
  --list-w:      310px;
  --mob-nav-h:   60px;
}
body.light {
  --bg:         #f0f2f7;
  --sidebar-bg: #ffffff;
  --panel-bg:   #ffffff;
  --hover-bg:   #f0f4ff;
  --active-bg:  #dde8ff;
  --border:     #dde2ec;
  --text1:      #1a1d2e;
  --text2:      #6b7280;
  --input-bg:   #f8f9fc;
  --msg-unread: #eef3ff;
  --msg-sel:    #cfe0ff;
  --msg-current: #ffffff;
  --read-bg:    #f8f9fc;
  --shadow:     0 2px 8px rgba(0,0,0,.08);
}

/* ═══════════════════════════════════════════════════
   리셋 / 기본
═══════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px; background: var(--bg); color: var(--text1);
  line-height: 1.5; overflow: hidden;
}
a { color: var(--accent); text-decoration: none; }
button { cursor: pointer; font-family: inherit; font-size: inherit; background: none; border: none; }
input, textarea, select {
  font-family: inherit; font-size: inherit;
  background: var(--input-bg); color: var(--text1);
  border: 1px solid var(--border); border-radius: 6px; outline: none;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); }
textarea { resize: vertical; }

/* ═══════════════════════════════════════════════════
   공통 버튼
═══════════════════════════════════════════════════ */
.btn-accent {
  background: var(--accent); color: #fff;
  border: none; border-radius: 6px; padding: .42rem .9rem; font-weight: 600;
  transition: background .15s;
}
.btn-accent:hover { background: var(--accent-h); }
.btn-logout {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .35rem .85rem; border-radius: 7px; font-size: .82rem; font-weight: 600;
  color: #f97316; border: 1px solid rgba(249,115,22,.35);
  background: rgba(249,115,22,.08);
  text-decoration: none; transition: background .15s, border-color .15s;
}
.btn-logout:hover { background: rgba(249,115,22,.18); border-color: rgba(249,115,22,.6); color: #f97316; }
.btn-logout svg { flex-shrink: 0; width: 18px; height: 18px; }
.btn-ghost {
  background: transparent; color: var(--text2);
  border: 1px solid var(--border); border-radius: 6px; padding: .38rem .8rem;
  transition: background .15s, color .15s;
}
.btn-ghost:hover { background: var(--hover-bg); color: var(--text1); }
.btn-sm { padding: .3rem .65rem; font-size: .82rem; }
.icon-btn {
  background: none; border: none; padding: .35rem .5rem;
  color: var(--text2); border-radius: 5px; font-size: 1rem;
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--hover-bg); color: var(--text1); }
.text-danger { color: var(--danger) !important; }

/* ═══════════════════════════════════════════════════
   반응형 헬퍼
═══════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .desk-only { display: none !important; }
  .mob-only  { display: flex !important; }
}
@media (min-width: 769px) {
  .mob-only  { display: none !important; }
  .desk-only { display: flex !important; }
}

/* ═══════════════════════════════════════════════════
   토스트 (데스크톱)
═══════════════════════════════════════════════════ */
#toastContainer {
  position: fixed; bottom: 5rem; left: 50%; transform: translateX(-50%);
  z-index: 10000; display: flex; flex-direction: column-reverse; gap: .4rem;
  align-items: center; pointer-events: none;
}
.toast {
  background: rgba(40, 40, 40, 0.88); color: #fff;
  border-radius: 24px; padding: .55rem 1.2rem;
  font-size: .88rem; white-space: nowrap; max-width: 80vw;
  box-shadow: 0 2px 12px rgba(0,0,0,.35);
  animation: toastSlideUp .22s ease; pointer-events: auto;
}
.toast.fade-out { animation: toastFadeOut .3s ease forwards; }
@keyframes toastSlideUp { from { opacity:0; transform:translateY(16px); } to { opacity:1; transform:none; } }
@keyframes toastFadeOut { to   { opacity:0; transform:translateY(8px); } }

/* ═══════════════════════════════════════════════════
   헤더
═══════════════════════════════════════════════════ */
#appHeader {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--sidebar-bg); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: .6rem;
  padding: 0 .8rem; z-index: 100;
}
#appLogo { font-size: 1.05rem; font-weight: 700; white-space: nowrap; }
#mailBadge {
  padding: .3rem .85rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text2);
  font-size: .82rem;
  white-space: nowrap;
  user-select: none;
  pointer-events: none;
}
#headerRight { margin-left: auto; display: flex; align-items: center; gap: .5rem; }
#headerUser  { font-size: .82rem; color: var(--text2); }

/* ═══════════════════════════════════════════════════
   앱 바디 레이아웃
═══════════════════════════════════════════════════ */
#appBody {
  display: flex;
  height: calc(100vh - var(--header-h));
  margin-top: var(--header-h);
  overflow: hidden;
}

/* ═══════════════════════════════════════════════════
   사이드바
═══════════════════════════════════════════════════ */
#sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: var(--sidebar-bg); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.compose-btn {
  margin: .7rem .7rem .4rem; padding: .52rem;
  background: var(--accent); color: #fff; border-radius: var(--radius);
  font-weight: 700; font-size: .9rem; text-align: center;
  transition: background .15s;
}
.compose-btn:hover { background: var(--accent-h); }
#folderNav { flex: 1; overflow-y: auto; padding-bottom: .5rem; }
.folder-item {
  display: flex; align-items: center; gap: .5rem;
  padding: .28rem .85rem; border-radius: 6px; margin: .03rem .45rem;
  cursor: pointer; color: var(--text1); transition: background .12s;
  user-select: none;
}
.folder-item:hover  { background: var(--hover-bg); }
.folder-item.active { background: var(--active-bg); font-weight: 600; }
.folder-icon  { font-size: .95rem; flex-shrink: 0; }
.folder-label { flex: 1; font-size: .87rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-badge {
  background: var(--accent); color: #fff; font-size: .7rem; font-weight: 700;
  padding: .1em .42em; border-radius: 10px; min-width: 18px; text-align: center;
}
#sidebarFooter {
  border-top: 1px solid var(--border); padding: .4rem;
  display: flex; flex-direction: column; gap: .15rem;
}
.sidebar-foot-btn {
  background: none; border: none; color: var(--text2);
  padding: .38rem .65rem; border-radius: 6px; text-align: left; font-size: .83rem;
  transition: background .12s, color .12s;
  display: flex; align-items: center; gap: .3rem;
}
.sidebar-foot-btn:hover { background: var(--hover-bg); color: var(--text1); }
.foot-icon { font-size: 1.1rem; line-height: 1; flex-shrink: 0; }
#sidebarBackdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 49; }

/* ═══════════════════════════════════════════════════
   메일 목록 패널
═══════════════════════════════════════════════════ */
#listPane {
  width: var(--list-w); flex-shrink: 0;
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
#listToolbar {
  display: flex; align-items: center; gap: .25rem;
  padding: .38rem .55rem; border-bottom: 1px solid var(--border);
  background: var(--panel-bg); flex-wrap: wrap; flex-shrink: 0;
}
.check-all { display: flex; align-items: center; gap: .3rem; font-size: .82rem; color: var(--text2); cursor: pointer; }
.toolbar-btn { font-size: .78rem; padding: .25rem .55rem; font-weight: 600; border-radius: 5px; }
.btn-danger {
  background: var(--danger); color: #fff;
  border: none; border-radius: 6px; padding: .42rem .9rem; font-weight: 600;
  transition: background .15s;
}
.btn-danger:hover { background: #c03030; }
#paginationWrap { display: flex; align-items: center; gap: .2rem; }
#pageInfo { font-size: .75rem; color: var(--text2); white-space: nowrap; }
.toggle-switch { position: relative; display: inline-block; cursor: pointer; }
.toggle-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-track { display: block; width: 46px; height: 26px; border-radius: 13px; background: var(--border); transition: background .2s; }
.toggle-switch input:checked + .toggle-track { background: #2d7aee; }
.toggle-thumb { position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.3); transition: transform .2s; }
.toggle-switch input:checked + .toggle-track .toggle-thumb { transform: translateX(20px); }
#messageList { flex: 1; overflow-y: auto; flex-direction: column; align-items: stretch; }
.mob-action-backdrop { display:none; position:fixed; inset:0; background:rgba(0,0,0,.45); z-index:9998; }
.mob-action-backdrop.show { display:block; }
.mob-action-sheet { position:fixed; bottom:0; left:0; right:0; z-index:9999; background:var(--panel-bg,#1c1e26); border-radius:14px 14px 0 0; padding:.5rem .75rem calc(.5rem + env(safe-area-inset-bottom)); transform:translateY(100%); transition:transform .25s ease; }
.mob-action-sheet.show { transform:translateY(0); }
.mob-action-btn { display:block; width:100%; padding:.95rem 1rem; font-size:1rem; text-align:center; background:none; border:none; color:var(--text1); cursor:pointer; border-radius:10px; }
.mob-action-btn:active { background:var(--hover); }
.mob-action-danger { color:#e05555; }
.mob-action-sep { height:1px; background:var(--border); margin:.25rem 0; }
.mob-attach-btn { display:flex; align-items:center; gap:.85rem; text-align:left; padding:.9rem 1.2rem; }
.mob-attach-btn svg { flex-shrink:0; opacity:.75; }
.sig-item { display:flex; align-items:center; gap:.6rem; padding:.55rem .75rem; border:1px solid var(--border); border-radius:8px; margin-bottom:.4rem; background:var(--bg); }
.sig-item-name { flex:1; font-size:.88rem; color:var(--text1); }
.sig-item-actions { display:flex; gap:.4rem; flex-shrink:0; }
.sig-item-actions button { font-size:.78rem; padding:.18rem .5rem; }

/* 메시지 행 (데스크톱) */
.msg-row {
  display: flex; align-items: flex-start; gap: .45rem;
  padding: .52rem .65rem; border-bottom: 1px solid var(--border);
  cursor: pointer; transition: background .1s;
}
.msg-row:hover { background: var(--hover-bg); }
.msg-row.msg-current {
  background: var(--msg-current);
  border-left: 3px solid var(--accent);
  padding-left: calc(.65rem - 3px);
}
.msg-row.msg-current:hover { background: var(--msg-current); }
.msg-row.active .msg-unread-dot { background: #fff; }
.msg-row.selected { background: var(--msg-sel); }
.msg-row.unread   { background: var(--msg-unread); }
.msg-row.unread .msg-from    { font-weight: 900; color: var(--text1); }
.msg-row.unread .msg-subject { font-weight: 900; color: var(--text1); }
.msg-row.unread .msg-date    { font-weight: 700; color: var(--text1); }
.msg-cb       { margin-top: .15rem; flex-shrink: 0; }
/* 안 읽음 인디케이터 */
.msg-unread-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0; margin-top: .45rem;
  display: none;
}
.msg-row.unread .msg-unread-dot { display: block; }
.msg-content  { flex: 1; min-width: 0; }
.msg-top      { display: flex; justify-content: space-between; gap: .4rem; }
.msg-from    { font-size: .84rem; font-weight: 400; color: var(--text2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 155px; }
.msg-date    { font-size: .74rem; color: var(--text2); white-space: nowrap; flex-shrink: 0; }
.msg-subject { font-size: .82rem; font-weight: 400; color: var(--text2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-top: .08rem; }
.msg-icons    { font-size: .72rem; color: var(--text2); margin-top: .06rem; }
.list-empty, .list-loading { text-align: center; padding: 3rem 1rem; color: var(--text2); font-size: .9rem; }

/* ═══════════════════════════════════════════════════
   콘텐츠 패널
═══════════════════════════════════════════════════ */
#contentPane {
  flex: 1; min-width: 0; display: flex; flex-direction: column;
  overflow: hidden; background: var(--read-bg);
}

/* 메일 읽기 */
#readView { display: flex; flex-direction: column; height: 100%; overflow: hidden; padding: 0 2.5%; }
#readHeader {
  padding: .9rem 1.1rem .55rem; border-bottom: 1px solid var(--border);
  background: var(--panel-bg); flex-shrink: 0;
}
#readSubject { font-size: 1.1rem; font-weight: 700; margin-bottom: .35rem; word-break: break-word; }
#readMeta { display: flex; align-items: baseline; gap: .8rem; font-size: .83rem; }
#readFrom  { font-weight: 600; }
#readDate  { margin-left: auto; color: var(--text2); font-size: .78rem; }
#readTo    { margin-top: .2rem; font-size: .78rem; color: var(--text2); }
#readActions { margin-top: .55rem; display: flex; gap: .35rem; flex-wrap: wrap; }
#readAttachments {
  padding: .45rem 1.1rem; border-bottom: 1px solid var(--border);
  background: var(--panel-bg); display: flex; gap: .4rem; flex-wrap: wrap; flex-shrink: 0;
}
.attach-chip {
  display: flex; align-items: center; gap: .3rem;
  background: var(--hover-bg); border: 1px solid var(--border);
  border-radius: 20px; padding: .22rem .65rem; font-size: .78rem;
  cursor: pointer; transition: background .12s;
}
.attach-chip:hover { background: var(--active-bg); }
#readBody { flex: 1; overflow: auto; padding: 1rem 1.1rem; }
#readBody iframe { width: 100%; border: none; background: #fff; border-radius: var(--radius); min-height: 300px; }

/* ═══════════════════════════════════════════════════
   메일 작성 모달
═══════════════════════════════════════════════════ */
/* 메일 작성 — 콘텐츠 패널 인라인 (데스크톱) / 전체화면 (모바일) */
#composeModal {
  padding: 0 2.5%; overflow: hidden;
  background: var(--panel-bg);
}
.compose-header {
  display: flex; align-items: center; gap: .5rem;
  padding: .5rem .2rem; border-bottom: 1px solid var(--border);
  background: var(--panel-bg); flex-shrink: 0;
}
#composeTitle { font-weight: 700; font-size: .9rem; }
.compose-body { flex: 1; overflow-y: auto; padding: .6rem .2rem; display: flex; flex-direction: column; gap: .45rem; }
.compose-field { display: flex; flex-direction: column; gap: .18rem; }
.compose-field label { font-size: .75rem; color: var(--text2); }
.compose-input { width: 100%; padding: .35rem .65rem; border-radius: 6px; font-size: .88rem; }
.tag-input-wrap {
  display: flex; flex-wrap: wrap; gap: .25rem; padding: .22rem .45rem; min-height: 30px;
  background: var(--input-bg); border: 1px solid var(--border); border-radius: 6px; align-items: center;
}
.tag-input-wrap:focus-within { border-color: var(--accent); }
.tags { display: flex; flex-wrap: wrap; gap: .22rem; }
.tag {
  display: flex; align-items: center; gap: .28rem;
  background: var(--active-bg); color: var(--text1);
  border-radius: 12px; padding: .12rem .48rem; font-size: .79rem;
}
.tag-remove { color: var(--text2); font-size: .72rem; padding: 0; line-height: 1; }
.tag-input-wrap input { flex: 1; min-width: 140px; padding: .18rem .3rem; background: none; border: none; outline: none; }
.attach-list { display: flex; flex-wrap: wrap; gap: .3rem; }
.attach-item {
  display: flex; align-items: center; gap: .3rem;
  background: var(--hover-bg); border: 1px solid var(--border);
  border-radius: 14px; padding: .2rem .55rem; font-size: .77rem;
}
.attach-del { color: var(--danger); font-size: .78rem; }
.editor-toolbar {
  display: flex; gap: .18rem; flex-wrap: wrap; padding: .32rem .45rem;
  border: 1px solid var(--border); border-bottom: none;
  border-radius: 6px 6px 0 0; background: var(--panel-bg);
}
.editor-toolbar button {
  padding: .23rem .48rem; border-radius: 4px; font-size: .86rem; color: var(--text1);
}
.editor-toolbar button:hover { background: var(--hover-bg); }
.editor-toolbar .sep { color: var(--border); align-self: center; padding: 0 .1rem; }
.compose-editor {
  flex: 1; min-height: 240px; padding: .75rem; overflow-y: auto;
  border: 1px solid var(--border); border-radius: 0 0 6px 6px;
  background: var(--input-bg); color: var(--text1); line-height: 1.6;
}
.compose-editor:focus { outline: none; border-color: var(--accent); }
.compose-editor-wrap { flex: 1; display: flex; flex-direction: column; }

/* ═══════════════════════════════════════════════════
   모달 (이동 등)
═══════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center;
}
.modal-box {
  background: var(--panel-bg); border: 1px solid var(--border);
  border-radius: var(--radius); min-width: 240px; box-shadow: var(--shadow); overflow: hidden;
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .65rem 1rem; border-bottom: 1px solid var(--border); font-weight: 700;
}
.modal-close { color: var(--text2); font-size: 1rem; padding: 0; }
.modal-folder-item { padding: .48rem 1rem; cursor: pointer; font-size: .9rem; transition: background .1s; }
.modal-folder-item:hover { background: var(--hover-bg); }

/* ═══════════════════════════════════════════════════
   주소록
═══════════════════════════════════════════════════ */
.view-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: .75rem 1.1rem; border-bottom: 1px solid var(--border);
  background: var(--panel-bg); flex-shrink: 0;
}
.view-header h2 { font-size: .95rem; font-weight: 700; }
#contactsView, #settingsView, #spamView, #adminView { display: flex; flex-direction: column; height: 100%; overflow: hidden; }
#settingsView, #spamView, #contactsView, #adminView { padding-left: 2.5%; padding-right: 2.5%; }
body.light #contentPane { background: #fff; }
#contactList { flex: 1; overflow-y: auto; min-height: 0; }
.contact-row {
  display: flex; align-items: flex-start; gap: .55rem; flex-wrap: wrap;
  padding: .6rem 1rem; border-bottom: 1px solid var(--border);
  transition: background .1s;
}
.contact-row:hover { background: var(--hover-bg); }
.contact-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--active-bg); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .88rem; flex-shrink: 0; margin-top: .1rem;
}
.contact-info   { flex: 1; min-width: 0; }
.contact-meta   { font-size: .82rem; color: var(--text1); margin-top: .18rem; line-height: 1.5; word-break: break-all; }
.contact-meta:first-child { margin-top: 0; }
.contact-label  { color: var(--text2); font-size: .78rem; }
.contact-notes  { white-space: pre-wrap; }
.contact-actions { display: flex; gap: .3rem; flex-wrap: wrap; align-items: center; width: 100%; padding-left: 38px; margin-top: .35rem; }
.contact-pager { display:flex; align-items:center; gap:.3rem; padding:.45rem 1rem; border-top:1px solid var(--border); flex-wrap:wrap; flex-shrink:0; }
.contact-pager-info { font-size:.75rem; color:var(--text2); margin-left:auto; white-space:nowrap; }
.addr-book-btn { font-size:.72rem; padding:.15rem .5rem; flex-shrink:0; }
.addr-book-row { display:flex; align-items:center; gap:.75rem; padding:.55rem 1.4rem; cursor:pointer; border-bottom:1px solid var(--border); transition:background .12s; }
.addr-book-row:hover { background:var(--hover-bg); }
.addr-book-row:last-child { border-bottom:none; }
.addr-book-chk { width:16px; height:16px; flex-shrink:0; cursor:pointer; accent-color:var(--accent); }
.contact-form { padding: .9rem 1.1rem; border-top: 1px solid var(--border); flex-shrink: 0; }
.contact-form h3 { margin-bottom: .7rem; font-size: .92rem; }
.form-group { margin-bottom: .55rem; }
.form-group label { display: block; font-size: .77rem; color: var(--text2); margin-bottom: .18rem; }
.form-group input, .form-group textarea { width: 100%; padding: .44rem .7rem; }

/* ═══════════════════════════════════════════════════
   설정
═══════════════════════════════════════════════════ */
#settingsView { overflow-y: auto; }
.settings-section { padding: .9rem 1.1rem; border-bottom: 1px solid var(--border); }
.settings-section h3 {
  font-size: .8rem; font-weight: 700; margin-bottom: .7rem;
  color: var(--text2); text-transform: uppercase; letter-spacing: .04em;
}

/* ═══════════════════════════════════════════════════
   스크롤바
═══════════════════════════════════════════════════ */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text2); }

/* ═══════════════════════════════════════════════════
   모바일 레이아웃 (≤768px)
═══════════════════════════════════════════════════ */
@media (max-width: 768px) {
  :root { --sidebar-w: 270px; }

  body { overflow: auto; }

  /* 사이드바 오버레이 */
  #sidebar {
    position: fixed; left: 0; top: var(--header-h); bottom: var(--mob-nav-h);
    z-index: 50;
    transform: translateX(-100%);
    transition: transform .25s cubic-bezier(.4,0,.2,1);
    width: var(--sidebar-w) !important;
  }
  #sidebar.open, #sidebar.panel-in { transform: translateX(0); }
  #sidebarBackdrop.show { display: block !important; }

  /* 목록 패널 전체 폭 */
  #listPane {
    width: 100% !important;
    height: calc(100vh - var(--header-h) - var(--mob-nav-h));
  }

  /* 컨텐츠 패널: 숨김 → 이메일 탭 시 전체화면 오버레이 */
  #contentPane {
    display: none !important;
    position: fixed !important;
    inset: var(--header-h) 0 var(--mob-nav-h) 0 !important;
    z-index: 41;
    overflow-y: auto;
  }
  #contentPane.mob-open { display: flex !important; }

  /* 모바일 툴바 */
  .mob-toolbar {
    display: flex; align-items: center;
    padding: .38rem .65rem; border-bottom: 1px solid var(--border);
    background: var(--panel-bg); flex-shrink: 0;
  }
  #listFolderTitle { font-size: .9rem; font-weight: 700; }

  /* 하단 네비 바 */
  .mob-nav-bar {
    position: fixed; bottom: 0; left: 0; right: 0;
    height: var(--mob-nav-h);
    background: var(--sidebar-bg); border-top: 1px solid var(--border);
    display: flex !important; align-items: center; justify-content: space-between;
    padding: 0 .5rem; z-index: 100;
  }
  .mob-nav-btn {
    flex: 1; display: flex; align-items: center; justify-content: center;
    padding: .5rem; font-size: 1.15rem; color: var(--text2);
    border-radius: 8px; transition: background .1s, color .1s;
    max-width: 64px;
  }
  .mob-nav-btn:hover { background: var(--hover-bg); color: var(--text1); }
  .mob-nav-btn.mob-fab {
    background: var(--accent); color: #fff; border-radius: 50%;
    width: 44px; height: 44px; flex: 0 0 44px; font-size: 1.1rem;
  }
  .mob-nav-btn.mob-fab:hover { background: var(--accent-h); }

  /* 읽기 뷰 헤더 */
  #readHeader { padding: .7rem .9rem .45rem; }
  #readBody   { padding: .8rem .9rem; }

  /* 모바일: 메일 작성 전체화면 오버레이 */
  #composeModal { position: fixed; inset: 0; z-index: 300; padding: 0; }
}

/* ═══════════════════════════════════════════════════
   F7 오버라이드 (모바일 전용)
═══════════════════════════════════════════════════ */
@media (max-width: 768px) {
  /* 모바일 메시지 목록 */
  #mailBadge { display: none; }
  #messageListMob { width: 100%; }
  #f7MsgList { list-style: none; margin: 0; padding: 0; width: 100%; }
  .mob-msg-empty { padding: 2rem; text-align: center; color: var(--text2); }
  .mob-msg-row {
    display: flex; align-items: center; gap: .55rem;
    padding: .65rem .75rem; border-bottom: 1px solid var(--border);
    background: var(--panel-bg); cursor: pointer; transition: background .1s;
    width: 100%; box-sizing: border-box;
  }
  .mob-msg-row:active { background: var(--hover-bg); }
  .mob-msg-row.unread { background: var(--msg-unread); }
  .mob-msg-avatar {
    width: 38px; height: 38px; border-radius: 50%;
    background: var(--active-bg); color: var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: .92rem; flex-shrink: 0;
  }
  .mob-msg-body { flex: 1; min-width: 0; }
  .mob-msg-top { display: flex; justify-content: space-between; align-items: baseline; gap: .3rem; }
  .mob-msg-from { font-size: .87rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; color: var(--text1); }
  .mob-msg-date { font-size: .72rem; color: var(--text2); white-space: nowrap; flex-shrink: 0; }
  .mob-msg-sub  { font-size: .8rem; color: var(--text2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-top: .15rem; }
  .mob-msg-row.unread .mob-msg-from { font-weight: 800; }
  .mob-msg-row.unread .mob-msg-sub  { color: var(--text1); font-weight: 600; }
  .mob-msg-icons { font-size: .72rem; }
  .mob-msg-more {
    background: none; border: none; color: var(--text2);
    font-size: 1.35rem; padding: .25rem .5rem;
    flex-shrink: 0; line-height: 1; border-radius: 6px; cursor: pointer;
  }
  .mob-msg-more:active { background: var(--hover-bg); }

  /* F7 Dialog */

  /* F7 Dialog */
  .dialog { border-radius: 14px !important; overflow: hidden; }
  .dialog-title   { font-family: inherit !important; }
  .dialog-text    { font-family: inherit !important; font-size: .88rem !important; }
  .dialog-buttons { font-family: inherit !important; }

  /* F7 PTR preloader */
  /* PTR (Pull To Refresh) */
  #messageListMob { position: relative; }
  .ptr-preloader {
    position: absolute; left: 50%; top: -48px;
    width: 40px; height: 40px; margin-left: -20px;
    background: var(--panel-bg); border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0,0,0,.35);
    display: flex; align-items: center; justify-content: center;
    z-index: 200; transition: transform .3s;
  }
  .ptr-arrow {
    width: 12px; height: 12px;
    border-left: 2px solid var(--text2); border-bottom: 2px solid var(--text2);
    transform: rotate(-45deg); transition: transform .3s;
  }
  .preloader {
    width: 20px; height: 20px;
    border: 2px solid var(--border); border-top-color: var(--accent);
    border-radius: 50%;
  }
  .preloader-in { animation: ptr-spin .7s linear infinite; }
  @keyframes ptr-spin { to { transform: rotate(360deg); } }

  /* F7 Dialog */
  .dialog-backdrop {
    position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 12999;
  }
  .dialog {
    position: fixed; top: 50%; left: 50%;
    transform: translate3d(-50%,-50%,0);
    background: var(--panel-bg); border-radius: 14px;
    min-width: 270px; max-width: 88vw; z-index: 13000;
    box-shadow: 0 4px 24px rgba(0,0,0,.5); overflow: hidden;
  }
  .dialog-inner { padding: 1.3rem 1.1rem .7rem; text-align: center; }
  .dialog-title { font-size: 1rem; font-weight: 700; color: var(--text1); margin-bottom: .4rem; }
  .dialog-text { font-size: .88rem; color: var(--text2); line-height: 1.55; }
  .dialog-buttons { display: flex; border-top: 1px solid var(--border); }
  .dialog-button {
    flex: 1; padding: .8rem; text-align: center;
    font-size: .95rem; color: var(--accent); cursor: pointer;
    transition: background .1s;
  }
  .dialog-button:active { background: var(--hover-bg); }
  .dialog-button + .dialog-button { border-left: 1px solid var(--border); }
  .dialog-button-bold { font-weight: 700; }

  /* 사이드바 F7 밝은 오버라이드 */
  body.light #sidebar {
    --active-bg: #dde8ff;
    --hover-bg: #f0f4ff;
  }
}

/* ── 스팸 설정 ───────────────────────────────────── */
.spam-tabs {
  display: flex; border-bottom: 2px solid var(--border);
  margin-bottom: 1.2rem; gap: 0;
}
.spam-tab {
  padding: .6rem 1.2rem; font-size: .9rem; font-weight: 500;
  color: var(--text2); background: none; border: none;
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  cursor: pointer; transition: color .15s, border-color .15s;
}
.spam-tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 700; }
.spam-tab:hover:not(.active) { color: var(--text1); }
.spam-tab-panel { flex: 1; overflow-y: auto; min-height: 0; padding-bottom: 1.5rem; }
.spam-section { margin-bottom: 1.6rem; }
.spam-section-title {
  font-size: .88rem; font-weight: 700; color: var(--text1);
  padding-bottom: .4rem; border-bottom: 1px solid var(--border);
  margin-bottom: .9rem;
}
.spam-row {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: .55rem 0; border-bottom: 1px solid var(--border);
}
.spam-row:last-child { border-bottom: none; }
.spam-label {
  width: 180px; flex-shrink: 0; font-size: .84rem;
  color: var(--text2); padding-top: .1rem; line-height: 1.5;
}
.spam-ctrl { flex: 1; display: flex; flex-direction: column; gap: .35rem; }
.spam-radio, .spam-check {
  display: flex; align-items: center; gap: .4rem;
  font-size: .85rem; cursor: pointer; color: var(--text1);
}
.spam-radio input, .spam-check input { cursor: pointer; accent-color: var(--accent); }
.spam-sub { margin-left: 1.2rem; margin-top: .3rem; display: flex; flex-direction: column; gap: .3rem; }
.spam-langs { display: flex; gap: 1rem; margin-left: 1.2rem; margin-top: .25rem; flex-wrap: wrap; }
.spam-desc { font-size: .78rem; color: var(--text2); line-height: 1.55; }
.spam-select {
  padding: .3rem .6rem; border-radius: 6px; font-size: .85rem;
  border: 1px solid var(--border); background: var(--input-bg); color: var(--text1);
}
.spam-actions { display: flex; gap: .5rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.srow + .spam-actions { border-top: none; }
.spam-input-row { display: flex; gap: .5rem; align-items: center; margin-bottom: .75rem; }
.spam-chip-list { display: flex; flex-wrap: wrap; gap: .4rem; min-height: 2rem; }
.spam-chip {
  display: flex; align-items: center; gap: .3rem;
  background: var(--hover-bg); border: 1px solid var(--border);
  border-radius: 20px; padding: .2rem .65rem; font-size: .82rem; color: var(--text1);
}
.spam-chip button {
  color: var(--text2); font-size: .85rem; line-height: 1;
  padding: 0; cursor: pointer;
}
.spam-chip button:hover { color: var(--danger); }
.spam-chip.block    { border-color: rgba(224,80,80,.4); color: #e05050; background: rgba(224,80,80,.07); }
.spam-chip.selected { border-color: var(--accent); background: rgba(79,142,247,.15); }
.spam-preset-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: .4rem .8rem; }
.spam-keyword-box {
  border: 1px solid var(--border); border-radius: 6px;
  min-height: 120px; padding: .5rem; background: var(--input-bg);
  display: flex; flex-wrap: wrap; align-content: flex-start; gap: .35rem;
}
.spam-kw-footer { display: flex; justify-content: space-between; align-items: center; margin-top: .3rem; }
.spam-image-banner { padding: .55rem 1rem; background: rgba(224,80,80,.08); border-left: 3px solid #e05050; font-size: .82rem; color: var(--text2); display: flex; align-items: center; gap: .75rem; flex-shrink: 0; }
.spam-image-banner .btn-ghost { margin-left: auto; padding: .2rem .6rem; font-size: .78rem; }
@media (max-width: 600px) {
  .spam-row { flex-direction: column; gap: .4rem; }
  .spam-label { width: auto; font-weight: 600; }
}

/* ── 설정 탭 ─────────────────────────────────────── */
.settings-tabs { display:flex; gap:0; border-bottom:2px solid var(--border); margin-bottom:1.2rem; flex-shrink:0; }
.settings-tab { background:none; border:none; border-bottom:2px solid transparent; margin-bottom:-2px; padding:.6rem .75rem; font-size:.82rem; color:var(--text2); cursor:pointer; transition:color .15s; white-space:nowrap; }
.settings-tab.active { color:var(--accent); border-bottom-color:var(--accent); font-weight:700; }
.settings-tab:hover:not(.active) { color:var(--text1); }
.stab-panel { flex:1; overflow-y:auto; padding-bottom:1.5rem; }
.srow { display:flex; gap:1.2rem; padding:.85rem 0; border-bottom:1px solid var(--border); align-items:flex-start; }
.srow:last-of-type { border-bottom:none; }
.slabel { width:160px; min-width:160px; font-size:.82rem; color:var(--text2); padding-top:.15rem; line-height:1.5; }
.sctrl { flex:1; display:flex; flex-direction:column; gap:.35rem; }

/* ── 목록 글자 크기 ─── */
#messageList.list-font-small  .msg-from, #messageList.list-font-small  .msg-subject { font-size:.78rem; }
#messageList.list-font-medium .msg-from, #messageList.list-font-medium .msg-subject { font-size:.88rem; }
#messageList.list-font-large  .msg-from, #messageList.list-font-large  .msg-subject { font-size:.98rem; }

/* ── 목록 한 줄 보기 ─── */
#messageList.list-compact .msg-subject { display:none; }
#messageList.list-compact .msg-row     { padding:.35rem .75rem; }

/* ── 메일 용량 ─── */
.msg-size { font-size:.72rem; color:var(--text2); margin-left:.4rem; }

/* ── TO 배지 ─── */
.to-badge { display:inline-block; font-size:.6rem; font-weight:700; padding:1px 4px; border:1px solid var(--accent); color:var(--accent); border-radius:3px; margin-left:.35rem; vertical-align:middle; }

/* ── 레이아웃 모드 ─── */
#appBody.layout-list   #contentPane { display:none; }
#appBody.layout-list.layout-msg-open #contentPane { display:flex; }
#appBody.layout-hsplit { flex-direction:column; }
#appBody.layout-hsplit #listPane    { max-height:40vh; overflow-y:auto; border-right:none; border-bottom:1px solid var(--border); }
#appBody.layout-hsplit #contentPane { flex:1; min-height:0; }

/* ── 대기 발송 토스트 ─── */
.delay-send-toast { display:flex; align-items:center; gap:.75rem; }
.delay-send-toast .delay-cancel-btn { margin-left:auto; }

/* ── 관리자 패널 ─────────────────────────────────── */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
  margin-top: .5rem;
}
.admin-table th {
  text-align: left;
  padding: .5rem .75rem;
  border-bottom: 2px solid var(--border);
  color: var(--text2);
  font-weight: 600;
  white-space: nowrap;
}
.admin-table td {
  padding: .55rem .75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.admin-table tr:hover td { background: var(--hover-bg); }
.admin-row-inactive td  { opacity: .5; }
.badge-ok  { background: rgba(52,199,89,.15); color: #34c759; border-radius: 4px; padding: .15rem .45rem; font-size: .78rem; }
.badge-off { background: rgba(255,59,48,.12); color: #ff3b30; border-radius: 4px; padding: .15rem .45rem; font-size: .78rem; }
@media (max-width: 600px) {
  .admin-table th:nth-child(3),
  .admin-table td:nth-child(3) { display: none; }
}

/* ── 사이드바 내 메일함 섹션 헤더 ───────────────── */
.folder-section-hdr {
  display: flex; align-items: center;
  padding: .38rem .85rem .25rem;
  margin-top: .3rem;
  border-top: 1px solid var(--border);
  padding-top: .45rem;
}
.folder-section-end {
  border-bottom: 1px solid var(--border);
  margin: .1rem .45rem .3rem;
}
.folder-hdr-btn {
  background: none; border: none;
  color: var(--text2); padding: .1rem .35rem; border-radius: 4px;
  font-size: .95rem; line-height: 1; cursor: pointer;
  transition: background .12s, color .12s;
}
.folder-hdr-btn:hover { background: var(--hover-bg); color: var(--text1); }

/* ── 메일함 관리 ────────────────────────────────── */
#mailboxView { padding: 0 2.5%; overflow: hidden; }
.mb-quota-bar {
  align-items: center; gap: .75rem;
  padding: .65rem 0 .75rem; border-bottom: 1px solid var(--border);
  margin-bottom: .25rem; flex-wrap: wrap;
}
.mb-quota-text { font-size: .83rem; color: var(--text2); white-space: nowrap; flex-shrink: 0; }
.mb-quota-progress {
  flex: 1; min-width: 80px; max-width: 220px;
  height: 7px; background: var(--border); border-radius: 4px; overflow: hidden;
}
.mb-quota-fill   { height: 100%; border-radius: 4px; transition: width .4s; }
.mb-quota-pct    { font-size: .78rem; color: var(--text2); min-width: 2.5rem; }
.mb-create-row {
  display: flex; align-items: center; gap: .6rem;
  padding: .85rem 0; border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.mb-create-label { font-size: .83rem; color: var(--text2); white-space: nowrap; }
.mb-rename-box {
  display: none; align-items: center; gap: .5rem;
  padding: .75rem 0; border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.mb-folder-row {
  display: flex; align-items: center; gap: .75rem;
  padding: .6rem 0; border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.mb-folder-name { flex: 1; font-size: .87rem; min-width: 100px; }
.mb-folder-cnt  { font-size: .8rem; color: var(--text2); white-space: nowrap; min-width: 60px; }
.mb-folder-acts { display: flex; gap: .3rem; flex-wrap: wrap; }

/* ── 자동분류 필터 ──────────────────────────────── */
.filter-toolbar {
  display: flex; align-items: center; gap: .5rem;
  padding: .75rem 0; border-bottom: 1px solid var(--border); margin-bottom: .75rem;
}
.filter-form {
  background: var(--panel-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 1rem 1.2rem; margin-bottom: 1rem;
}
.filter-form-row {
  display: flex; align-items: center; gap: .6rem;
  margin-bottom: .55rem; flex-wrap: wrap;
}
.filter-form-row label { font-size: .82rem; color: var(--text2); white-space: nowrap; min-width: 60px; }
.filter-table {
  width: 100%; border-collapse: collapse; font-size: .85rem;
}
.filter-table th {
  text-align: left; padding: .45rem .6rem;
  border-bottom: 2px solid var(--border); color: var(--text2); font-weight: 600;
}
.filter-table td {
  padding: .5rem .6rem; border-bottom: 1px solid var(--border); vertical-align: middle;
}
.filter-table tr:hover td { background: var(--hover-bg); }
@media (max-width: 600px) {
  .mb-folder-row { gap: .4rem; }
  .filter-table th:nth-child(3), .filter-table td:nth-child(3) { display: none; }
}