/* ===== Bố cục webmail ===== */
body.mail { overflow: hidden; }
.shell { display: grid; grid-template-rows: 56px 1fr; height: 100vh; height: 100dvh; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 0 14px; background: var(--panel); border-bottom: 1px solid var(--border); min-width: 0; }
.topbar .brand { min-width: 0; }
.topbar .brand .name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar .search { flex: 1; max-width: 640px; margin: 0 auto; display: flex; align-items: center; gap: 0; background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; height: 38px; padding-left: 10px; }
.topbar .search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); background: var(--panel); }
.topbar .search input { flex: 1; border: 0; background: transparent; outline: none; height: 36px; padding: 0 8px; min-width: 0; }
.topbar .search select { border: 0; background: transparent; color: var(--muted); height: 36px; padding: 0 6px; outline: none; max-width: 120px; }
.topbar .who { display: flex; align-items: center; gap: 6px; }
.avatar { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; color: #fff; font-size: 13px; flex: none; }
.usermenu { position: relative; }
.dropdown { position: absolute; right: 0; top: calc(100% + 6px); background: var(--panel); border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); min-width: 220px; padding: 6px; z-index: 300; }
.dropdown .item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px; border: 0; background: transparent; border-radius: 7px; cursor: pointer; text-align: left; color: var(--text); text-decoration: none !important; }
.dropdown .item:hover { background: var(--hover); }
.dropdown .sep { height: 1px; background: var(--border); margin: 6px 0; }
.dropdown .head { padding: 8px 10px; font-size: 12.5px; color: var(--muted); word-break: break-all; }

.main { display: grid; grid-template-columns: 236px minmax(0, 1fr); min-height: 0; }
.sidebar { background: var(--panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; min-height: 0; }
.sidebar .compose-btn { margin: 14px; height: 42px; border-radius: 12px; font-weight: 600; font-size: 14.5px; }
.sidebar nav { flex: 1; overflow: auto; padding: 0 8px 12px; }
.sidebar .sec { font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 14px 10px 6px; display: flex; align-items: center; }
.folder { display: flex; align-items: center; gap: 10px; height: 34px; padding: 0 10px; border-radius: 8px; cursor: pointer; color: var(--text); text-decoration: none !important; position: relative; user-select: none; }
.folder:hover { background: var(--hover); }
.folder.on { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.folder .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder .count { font-size: 12px; font-weight: 700; color: var(--primary); }
.folder.drop { outline: 2px dashed var(--primary); }
.folder .fmenu { opacity: 0; }
.folder:hover .fmenu { opacity: 1; }
.quota { padding: 12px 18px 16px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--border); }
.quota .bar { height: 5px; background: var(--border); border-radius: 3px; margin-top: 6px; overflow: hidden; }
.quota .bar i { display: block; height: 100%; background: var(--primary); }

.content { min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.view-mail { display: grid; grid-template-columns: minmax(320px, 420px) minmax(0, 1fr); min-height: 0; flex: 1; }
.view-mail.nopreview { grid-template-columns: minmax(0, 1fr); }
.view-mail.nopreview.reading .listpane { display: none; }
.view-mail.nopreview:not(.reading) .readpane { display: none; }
.listpane { display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--border); background: var(--panel); }
.toolbar { display: flex; align-items: center; gap: 4px; padding: 8px 10px; border-bottom: 1px solid var(--border); min-height: 50px; flex-wrap: wrap; background: var(--panel); }
.toolbar .title { font-weight: 600; font-size: 15px; padding: 0 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.toolbar .sep { width: 1px; height: 22px; background: var(--border); margin: 0 4px; }
.listhead { display: flex; align-items: center; gap: 6px; padding: 6px 12px; border-bottom: 1px solid var(--border); font-size: 12.5px; color: var(--muted); }
.listhead select { border: 0; background: transparent; color: var(--muted); outline: none; }
.msglist { flex: 1; overflow: auto; }
.msg { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto; gap: 2px 10px; padding: 10px 12px 10px 10px; border-bottom: 1px solid var(--border); cursor: pointer; position: relative; }
.msg:hover { background: var(--hover); }
.msg.on { background: var(--sel); }
.msg.sel { background: var(--sel); }
.msg .cb { grid-row: span 2; display: flex; align-items: flex-start; padding-top: 2px; }
.msg .cb input { width: 15px; height: 15px; accent-color: var(--primary); }
.msg .from { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.msg .date { font-size: 12px; color: var(--muted); white-space: nowrap; }
.msg .subj { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); font-size: 13.5px; }
.msg .icons { display: flex; gap: 4px; align-items: center; justify-content: flex-end; color: var(--muted); }
.msg .icons .ico { width: 15px; height: 15px; }
.msg.unread .from, .msg.unread .subj { font-weight: 700; color: var(--unread); }
.msg.unread::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--primary); }
.star { cursor: pointer; color: var(--muted); display: inline-flex; }
.star.on { color: #f5a524; }
.star.on .ico { fill: #f5a524; }
.pager { display: flex; align-items: center; gap: 6px; padding: 8px 12px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--muted); }
.empty { padding: 48px 20px; text-align: center; color: var(--muted); }
.empty .ico { width: 42px; height: 42px; stroke-width: 1.3; opacity: .6; }

.readpane { min-width: 0; min-height: 0; overflow: auto; background: var(--panel); }
.reader { max-width: 980px; margin: 0 auto; padding: 0 0 28px; }
.reader .rtool { position: sticky; top: 0; z-index: 5; background: var(--panel); }
.reader .head { padding: 18px 24px 8px; }
.reader h1 { font-size: 20px; margin: 0 0 14px; font-weight: 600; word-wrap: break-word; }
.reader .meta { display: flex; gap: 12px; align-items: flex-start; }
.reader .meta .avatar { width: 40px; height: 40px; font-size: 15px; }
.reader .meta .row { flex-wrap: wrap; }
.reader .addr { font-size: 13px; color: var(--muted); word-break: break-word; }
.reader .addr b { color: var(--text); font-weight: 600; }
.reader .banner { margin: 10px 24px 0; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.reader .body { padding: 10px 24px; }
.reader iframe { width: 100%; border: 0; min-height: 120px; display: block; background: #fff; border-radius: 6px; }
.atts { display: flex; flex-wrap: wrap; gap: 8px; padding: 6px 24px 10px; }
.att { display: flex; align-items: center; gap: 8px; border: 1px solid var(--border); border-radius: 9px; padding: 6px 10px; max-width: 280px; background: var(--panel-2); color: var(--text); text-decoration: none !important; }
.att:hover { border-color: var(--primary); }
.att .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.att .sz { font-size: 11.5px; color: var(--muted); }
.att img.thumb { width: 34px; height: 34px; object-fit: cover; border-radius: 5px; }

/* ===== Soạn thư ===== */
.compose { flex: 1; min-height: 0; overflow: auto; background: var(--panel); }
.compose .inner { max-width: 1060px; margin: 0 auto; padding: 0 0 30px; }
.compose .cfield { display: grid; grid-template-columns: 76px 1fr auto; align-items: center; gap: 8px; padding: 6px 20px; border-bottom: 1px solid var(--border); position: relative; }
.compose .cfield > label { color: var(--muted); font-size: 13px; }
.compose .cfield input { border: 0; outline: none; background: transparent; height: 32px; width: 100%; }
.compose .editor-wrap { padding: 12px 20px; }
.compose textarea.plain { width: 100%; min-height: 380px; border: 1px solid var(--border); border-radius: 8px; padding: 12px; background: var(--panel); outline: none; font-family: Consolas, Menlo, monospace; font-size: 13.5px; resize: vertical; }
.compose .attlist { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 20px 0; }
.compose .attlist .att { max-width: 320px; }
.compose .attlist .prog { width: 60px; height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.compose .attlist .prog i { display: block; height: 100%; background: var(--primary); }
.compose .opts { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; padding: 10px 20px; color: var(--muted); font-size: 13px; }
.compose.dragging .editor-wrap { outline: 2px dashed var(--primary); outline-offset: -6px; }
.suggest { position: absolute; left: 96px; right: 20px; top: 100%; background: var(--panel); border: 1px solid var(--border); border-radius: 9px; box-shadow: var(--shadow); z-index: 50; overflow: hidden; }
.suggest div { padding: 8px 12px; cursor: pointer; }
.suggest div.on, .suggest div:hover { background: var(--hover); }
.tox-tinymce { border-radius: 8px !important; border-color: var(--border) !important; }

/* ===== Danh bạ & cài đặt ===== */
.page { flex: 1; min-height: 0; overflow: auto; padding: 20px; }
.page .inner { max-width: 1000px; margin: 0 auto; }
.page h2 { margin: 0 0 16px; font-size: 20px; }
.contacts { display: grid; grid-template-columns: 320px 1fr; gap: 16px; align-items: start; }
.clist { max-height: calc(100vh - 220px); overflow: auto; }
.citem { display: flex; gap: 10px; align-items: center; padding: 9px 12px; border-bottom: 1px solid var(--border); cursor: pointer; }
.citem:hover { background: var(--hover); }
.citem.on { background: var(--sel); }
.settings { display: grid; grid-template-columns: 210px 1fr; gap: 16px; align-items: start; }
.settings .tabs { display: flex; flex-direction: column; gap: 2px; }
.settings .tabs a { padding: 9px 12px; border-radius: 8px; color: var(--text); text-decoration: none; }
.settings .tabs a.on { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }

.linkbar { background: var(--warn-soft); color: var(--warn); padding: 6px 14px; font-size: 13px; display: flex; gap: 10px; align-items: center; }
.mobile-only { display: none !important; }

@media (max-width: 1100px) {
  .view-mail { grid-template-columns: minmax(280px, 340px) minmax(0, 1fr); }
}
@media (max-width: 860px) {
  .mobile-only { display: inline-flex !important; }
  .desktop-only { display: none !important; }
  .main { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: 0; top: 56px; bottom: 0; width: 270px; z-index: 200; transform: translateX(-100%); transition: transform .2s; }
  body.nav-open .sidebar { transform: none; box-shadow: var(--shadow); }
  body.nav-open::after { content: ""; position: fixed; inset: 56px 0 0 0; background: rgba(0, 0, 0, .3); z-index: 150; }
  .view-mail, .view-mail.nopreview { grid-template-columns: 1fr; }
  .view-mail:not(.reading) .readpane { display: none; }
  .view-mail.reading .listpane { display: none; }
  .topbar { gap: 6px; padding: 0 8px; }
  .topbar .brand .name { display: none; }
  .topbar .search select { display: none; }
  .reader .head, .reader .body { padding-left: 14px; padding-right: 14px; }
  .reader .banner { margin-left: 14px; margin-right: 14px; }
  .atts { padding-left: 14px; padding-right: 14px; }
  .compose .cfield { grid-template-columns: 56px 1fr auto; padding: 6px 12px; }
  .compose .editor-wrap { padding: 10px 8px; }
  .suggest { left: 12px; right: 12px; }
  .contacts, .settings { grid-template-columns: 1fr; }
  .settings .tabs { flex-direction: row; overflow: auto; }
  .form-grid { grid-template-columns: 1fr; }
  .page { padding: 14px 12px; }
}
@media print {
  .topbar, .sidebar, .listpane, .rtool, .banner { display: none !important; }
  .main, .view-mail { display: block; }
  body.mail { overflow: visible; }
  .shell { display: block; height: auto; }
}