:root{
  --bg:#f5f5f5;
  --panel:#ffffff;
  --border:#e5e5e5;
  --text:#1f1f1f;
  --muted:#616161;
  --accent:#0078d4;
  --accent-weak:#e8f1fb;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",SegoeUI,system-ui,-apple-system,Arial,sans-serif;color:var(--text);background:var(--bg)}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.topbar{height:52px;display:flex;align-items:center;gap:12px;padding:0 16px;background:var(--accent);border-bottom:1px solid rgba(255,255,255,0.18);color:#fff}
.topbar a{color:#fff}.topbar a:hover{text-decoration:underline}.brand{font-weight:600;letter-spacing:.2px}
.shell{display:grid;height:calc(100vh - 52px)}
.shell.layout-right{grid-template-columns:280px 420px 1fr;grid-template-areas:"folders messages reader"}.shell.layout-bottom{grid-template-columns:280px 1fr;grid-template-rows:1fr 1fr;grid-template-areas:"folders messages" "folders reader"}
.pane{background:var(--panel);border-right:1px solid var(--border);overflow:auto}.pane:last-child{border-right:none}.pane.folders{grid-area:folders}.pane.messages{grid-area:messages}.pane.reader{grid-area:reader}
.section-title{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:14px 14px 8px}
.folder-list{list-style:none;padding:0;margin:0}.folder-list a{display:flex;justify-content:space-between;gap:10px;padding:10px 14px;color:var(--text);border-radius:6px;margin:2px 8px}.folder-list a:hover{background:#f6f6f6;text-decoration:none}.folder-list a.active{background:var(--accent-weak)}.folder-count{color:var(--muted)}
.msg-list{width:100%;border-collapse:collapse}.msg-list tr{border-bottom:1px solid var(--border)}.msg-list td{padding:10px 12px;vertical-align:top}.msg-row{cursor:pointer}.msg-row:hover{background:#fafafa}.msg-from{font-weight:600;font-size:13px}.msg-subject{font-size:13px;margin-top:2px}.msg-preview{color:var(--muted);font-size:12px;margin-top:3px;line-height:1.35}.msg-date{color:var(--muted);font-size:12px;white-space:nowrap}.msg-unread .msg-from,.msg-unread .msg-subject{font-weight:700}.msg-row.msg-selected{background:var(--accent-weak)}.msg-row.msg-selected:hover{background:#d9e9f7}
.reader{padding:14px 16px}.reader h1{font-size:18px;margin:0 0 10px}.meta{display:grid;grid-template-columns:80px 1fr;gap:6px 10px;margin-bottom:12px;font-size:13px}.meta .k{color:var(--muted)}
.body-frame{width:100%;height:55vh;min-height:340px;border:1px solid var(--border);border-radius:8px;background:#fff}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}.badge{font-size:12px;padding:2px 8px;border-radius:999px;border:1px solid var(--border);color:var(--muted)}
.btn{display:inline-block;padding:7px 10px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text)}.btn:hover{background:#f7f7f7;text-decoration:none}.topbar .btn{background:rgba(255,255,255,0.12);border-color:rgba(255,255,255,0.25);color:#fff}.topbar .btn:hover{background:rgba(255,255,255,0.18)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{filter:brightness(.95)}
.form-row{display:flex;gap:10px;align-items:center}.input{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:8px;outline:none}.small{color:var(--muted);font-size:12px}.attachments{margin-top:10px;padding:10px;border:1px solid var(--border);border-radius:8px;background:#fff}.attachments ul{margin:8px 0 0;padding-left:18px}
.folder-tree{padding-bottom:8px}.folder-node{list-style:none}.folder-line{display:flex;align-items:center;gap:2px;padding-left:0}.folder-line.depth-1{padding-left:14px}.folder-line.depth-2{padding-left:28px}.folder-line.depth-3{padding-left:42px}.folder-line.depth-4{padding-left:56px}.folder-line.depth-5{padding-left:70px}.folder-line a{flex:1;min-width:0}.folder-toggle,.folder-toggle-spacer{width:22px;height:28px;flex:0 0 22px;display:inline-flex;align-items:center;justify-content:center;border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:13px}.folder-toggle:hover{color:var(--text);background:#f3f3f3;border-radius:5px}.child-folders.collapsed{display:none}
.msg-folder{display:inline-block;margin-left:6px;padding:1px 6px;border-radius:999px;background:#f2f2f2;color:var(--muted);font-size:11px;white-space:nowrap}.att-badge{font-size:13px;opacity:.75}
.compose-panel{background:#fff;border:1px solid var(--border);border-radius:10px;padding:12px}.compose-row{margin-bottom:8px}.compose-label{width:58px;color:var(--muted);flex:0 0 58px}.compose-body{min-height:360px;font-family:Consolas,"Segoe UI",Arial,sans-serif;line-height:1.45}.top-search .input{min-width:220px}
.recipient-wrap{box-shadow:inset 0 1px 0 rgba(0,0,0,.02)}.chip{box-shadow:0 1px 0 rgba(0,0,0,.04)}.field-bubble{display:inline-block;margin-left:8px;font-size:11px;color:#fff;background:var(--accent);padding:2px 8px;border-radius:999px;box-shadow:0 2px 6px rgba(0,120,212,.2)}
.compose-editor{font-family:Calibri,Arial,sans-serif}.compose-editor blockquote{border-left:2px solid #d9d9d9;padding-left:12px;color:#555;margin-left:0}.compose-editor img{max-width:100%}.compose-editor table{border-collapse:collapse;max-width:100%}.compose-editor td,.compose-editor th{border:1px solid #ddd;padding:4px 6px}
.rules-list{display:grid;gap:10px;margin-top:10px}.rule-form .form-row{align-items:center;flex-wrap:wrap}.rule-form .input{min-width:180px}.modal .btn.primary{box-shadow:0 4px 12px rgba(0,120,212,.2)}
.load-more-wrap{text-align:center;padding:12px}.load-more-wrap .btn{cursor:pointer}.load-more-wrap .spinner{display:none;margin-left:8px}.load-more-wrap.loading .spinner{display:inline}.load-more-wrap.loading .btn-label{display:none}
.compose-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:10px 12px;border:1px solid var(--border);border-radius:12px;background:#fcfcfc;margin-bottom:10px}.toolbar-group{display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding-right:8px;border-right:1px solid #e9e9e9;margin-right:8px}.toolbar-group:last-child{border-right:0;margin-right:0;padding-right:0}.toolbar-btn,.toolbar-select{height:34px}.toolbar-btn{padding:6px 9px;border:1px solid var(--border);border-radius:8px;background:#fff;cursor:pointer;font-size:13px}.toolbar-btn:hover{background:#f7f7f7}.toolbar-select{border:1px solid var(--border);border-radius:8px;padding:0 10px;background:#fff;min-width:190px}.compose-editor-wrap{border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#fff}.compose-editor{min-height:460px;padding:16px;outline:none;font-family:Calibri,Arial,sans-serif;font-size:11pt;line-height:1.5;white-space:normal}.compose-editor:empty:before{content:attr(data-placeholder);color:#888}.compose-field-row{display:flex;gap:10px;align-items:stretch;margin-bottom:10px}.compose-field-label{width:58px;flex:0 0 58px;color:var(--muted);padding-top:11px}.compose-field-wrap{flex:1;min-width:0}.compose-field{flex:1}.compose-field .input,.subject-input{min-height:42px;padding:10px 12px;font-size:15px}.recipient-wrap{display:flex;align-items:flex-start;gap:8px;flex-wrap:wrap;border:1px solid var(--border);border-radius:8px;padding:5px 8px;background:#fff;min-height:42px}.recipient-wrap .chips{display:flex;gap:6px;flex-wrap:wrap;align-items:center;min-width:0;flex:1}.recipient-wrap input.recipient-input{border:0;outline:none;min-width:120px;flex:1;padding:6px 0;background:transparent}.chip{display:inline-flex;align-items:center;gap:6px;background:var(--accent-weak);color:#114d7d;padding:5px 9px;border-radius:999px;font-size:12px;max-width:100%}.chip button{border:0;background:transparent;cursor:pointer;color:inherit;font-size:14px;line-height:1}
.modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center}.modal.hidden{display:none}.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.32)}.modal-card{position:relative;background:#fff;border-radius:14px;box-shadow:0 24px 70px rgba(0,0,0,.3);border:1px solid rgba(0,0,0,.08);width:min(1100px, calc(100vw - 24px));max-height:calc(100vh - 24px);display:flex;flex-direction:column;overflow:hidden}.modal-lg{width:min(1280px, calc(100vw - 24px))}.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border);background:#fafafa}.modal-title{font-size:18px;font-weight:600}.modal-body{padding:14px 16px;overflow:auto}
.toast{position:fixed;right:18px;bottom:18px;background:#1f1f1f;color:#fff;padding:10px 12px;border-radius:10px;z-index:60;display:none}.toast.show{display:block}
.search-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:0 14px 10px}.search-pill{display:inline-flex;align-items:center;gap:6px;background:#f4f7fb;border:1px solid var(--border);color:#2f4b68;padding:4px 8px;border-radius:999px;font-size:12px}.search-all-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border:1px solid var(--border);border-radius:8px;background:#fff;cursor:pointer}.search-all-btn.active{background:var(--accent-weak);border-color:#bfd9f0}
.mail-shortcut{display:flex;justify-content:space-between;gap:12px}.mail-shortcut-left{min-width:0;flex:1}.mail-shortcut-right{flex:0 0 auto;text-align:right}.mail-shortcut-from{font-size:13px;font-weight:600}.mail-shortcut-subj{font-size:13px;margin-top:2px}.mail-shortcut-prev{color:var(--muted);font-size:12px;margin-top:2px;line-height:1.35}.mail-shortcut-folder{display:inline-block;font-size:11px;color:var(--muted);background:#f5f5f5;padding:2px 6px;border-radius:999px;margin-bottom:6px}.mail-shortcut-date{font-size:12px;color:var(--muted)}
@media (max-width:1100px){.shell.layout-right{grid-template-columns:240px 360px 1fr}}
@media (max-width:700px){.shell.layout-right,.shell.layout-bottom{grid-template-columns:1fr;grid-template-areas:none;grid-template-rows:auto}.pane.folders{display:none}}