/* 记事本布局：只有标签、正文和轻量状态栏。 */
:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#303030;background:#fff;font-synthesis:none;--green:#426958;--line:#e6e6e6}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}[hidden]{display:none!important}
button:focus-visible,summary:focus-visible,a:focus-visible{outline:2px solid #9baaa1;outline-offset:-2px}
.shell{height:100dvh;display:flex;flex-direction:column}.workspace{display:flex;flex-direction:column;flex:1;min-height:0;background:#fff}
.tabbar{height:42px;flex-shrink:0;display:flex;align-items:center;background:#f3f3f3;border-bottom:1px solid var(--line);gap:3px;padding:4px 8px 0}
#tabs{display:flex;gap:3px;overflow-x:auto;min-width:0;scrollbar-width:thin}.tab{display:flex;align-items:center;gap:10px;height:37px;min-width:90px;max-width:210px;padding:0 8px 0 12px;border:1px solid transparent;border-bottom:0;border-radius:5px 5px 0 0;flex-shrink:0}
.tab.selected{background:#fff;border-color:var(--line)}.tab>button:first-child{border:0;background:transparent;color:#666;font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:150px;padding:5px 0}.tab.selected>button:first-child{color:#252525}.tab .close{border:0;background:transparent;font-size:16px;line-height:1;color:#9b9b9b;padding:4px;border-radius:3px}.tab .close:hover{background:#e6e6e6;color:#444}
.add{flex-shrink:0;width:30px;height:30px;font-size:22px;font-weight:300;border:0;background:transparent;color:#777;align-self:center;margin-bottom:3px}.add:hover{background:#e6e6e6;border-radius:4px}
.tools{margin-left:auto;display:flex;gap:2px;align-items:center;padding-bottom:4px;flex-shrink:0}.button{border:1px solid #ddd;border-radius:4px;background:#fff;color:#555;padding:6px 10px;font-size:12px;white-space:nowrap}.button:hover{background:#eee}.button.quiet{background:transparent;border-color:transparent;padding:5px 9px}.button[aria-pressed="true"]{background:#e4e9e5;color:#345a43}
.more{position:relative}.more summary{list-style:none;cursor:pointer;padding:3px 10px;font-size:20px;color:#777;border-radius:4px;line-height:1}.more summary::-webkit-details-marker{display:none}.more summary:hover{background:#e6e6e6}.menu{position:absolute;top:33px;right:0;width:232px;z-index:3;background:#fff;border:1px solid #ddd;border-radius:6px;box-shadow:0 5px 18px #00000012;padding:5px}.menu-item{display:block;width:100%;padding:9px 10px;text-align:left;font-size:12px;border:0;background:transparent;color:#444;border-radius:3px}.menu-item:hover{background:#f0f0f0}.menu-note{display:block;border-top:1px solid #eee;margin-top:4px;padding:9px 10px;color:#999;font-size:11px;line-height:1.7}.menu-note:empty{display:none}
#editor-panel{display:flex;flex-direction:column;flex:1;min-height:0}.writing-area{flex:1;display:flex;min-height:0}.source-pane,.preview-pane{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column}
textarea{display:block;flex:1;width:100%;min-height:0;resize:none;border:0;outline:0;background:#fff;color:#303030;padding:20px 24px;font:15px/1.8 ui-monospace,SFMono-Regular,Menlo,Consolas,"PingFang SC",monospace;tab-size:4;overflow:auto}textarea::placeholder{color:#bbb}
footer{display:flex;align-items:center;gap:16px;flex-shrink:0;height:27px;padding:0 12px;border-top:1px solid #eee;color:#999;background:#fafafa;font-size:10px}.connection{margin-left:auto;display:flex;align-items:center;gap:5px}.connection:before{content:"";width:5px;height:5px;border-radius:50%;background:#aaa}.connection.online:before{background:#6e9a7d}
.empty{flex:1;display:grid;place-items:center}.empty .button{color:#888;background:transparent;border-color:#eee;padding:9px 16px}
.conflict{margin:8px 16px;padding:10px 12px;border:1px solid #ead9bb;border-radius:4px;background:#fffaf0;font-size:12px;color:#886d3b;flex-shrink:0}.conflict p{margin:0 0 8px}.conflict>div{display:flex;gap:8px;flex-wrap:wrap}
.recovery{max-height:220px;overflow:auto;padding:12px 16px;background:#fffaf0;border-top:1px solid #ead9bb;flex-shrink:0}.recovery h2{font-size:13px;margin:0}.recovery p{font-size:12px;color:#8b6a32;margin:6px 0}.draft-item{display:flex;align-items:center;gap:10px;padding:6px 0;font-size:12px;flex-wrap:wrap}.draft-item span{flex:1;overflow-wrap:anywhere}
.toast{position:fixed;bottom:40px;left:50%;transform:translateX(-50%);padding:9px 16px;border-radius:5px;background:#333;color:#fff;font-size:12px;max-width:90vw;z-index:5}
.markdown-body{padding:6px 22px 24px;overflow:auto;flex:1;color:#35473e;font-size:14px;line-height:1.8;overflow-wrap:anywhere}.markdown-body>:first-child{margin-top:0}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{color:#253a32;line-height:1.4;letter-spacing:0;margin:1.3em 0 .6em;font-weight:650}.markdown-body h1{font-size:28px;border-bottom:1px solid var(--line);padding-bottom:.3em}.markdown-body h2{font-size:22px;border-bottom:1px solid var(--line);padding-bottom:.3em}.markdown-body h3{font-size:18px}.markdown-body h4{font-size:16px}.markdown-body p{margin:.7em 0}.markdown-body a{color:var(--green);text-underline-offset:3px}.markdown-body pre{padding:14px 16px;border:1px solid #e5eae1;background:#f0f3ee;border-radius:8px;overflow:auto;white-space:pre;overflow-wrap:normal}.markdown-body code{font:12px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#eef2e9;border-radius:4px;padding:2px 5px}.markdown-body pre code{padding:0;background:none}.markdown-body blockquote{margin:1em 0;padding:2px 16px;border-left:3px solid #83ae97;color:#728370;background:#f3f6f0}.markdown-body ul,.markdown-body ol{padding-left:1.6em}.markdown-body li{margin:.2em 0}.markdown-body input{accent-color:var(--green);pointer-events:none}.markdown-body table{display:block;max-width:100%;width:max-content;overflow:auto;border-collapse:collapse;margin:1em 0}.markdown-body th,.markdown-body td{border:1px solid #dee6d9;padding:7px 12px}.markdown-body th{background:#eef3e9;font-weight:600}.markdown-body hr{border:0;border-top:1px solid var(--line);margin:1.5em 0}.markdown-body .preview-placeholder{color:#a3ada0;font-size:13px}

@media(max-width:640px){.tabbar{padding-left:4px;padding-right:4px}.tab{min-width:75px;max-width:140px;padding-left:9px;gap:5px}.tab>button:first-child{max-width:95px}.tools{gap:0}.button.quiet{padding:5px 7px;font-size:11px}.more summary{padding:4px 8px}textarea{padding:16px;font-size:16px}.markdown-body{padding:14px 16px 24px}footer{gap:10px;padding:0 9px}.menu{width:220px}}

/* 编辑器仍呈现为纯记事本，网址直接可点击，原文和撤销历史不变。 */
#content{flex:1;min-height:0;display:flex;overflow:hidden}
#content .cm-editor{width:100%;height:100%;color:#303030;background:white;outline:none;font-size:15px}
#content .cm-scroller{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"PingFang SC",monospace;line-height:1.8;overflow:auto}
#content .cm-content{padding:20px 0;font-variant-ligatures:none}
#content .cm-line{padding:0 24px}
#content .cm-placeholder{color:#bbb}
#content .cm-editor.cm-focused{outline:none}
#content .editor-link{color:#356a99;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
#content .editor-link:hover{color:#184e80}
#action-dialog{width:min(380px,calc(100vw - 32px));padding:24px;border:1px solid #ddd;border-radius:10px;color:#333;box-shadow:0 12px 50px #0002}
#action-dialog::backdrop{background:#0004}
#action-dialog h2{font-size:17px;font-weight:600;margin:0 0 12px}
#dialog-message{margin:0 0 16px;line-height:1.7;font-size:13px;color:#777;overflow-wrap:anywhere}
#dialog-input-label{display:block;font-size:12px;color:#777;margin-bottom:7px}
#dialog-input{width:100%;padding:9px 10px;border:1px solid #ccc;border-radius:5px;outline:none;font-size:14px}
#dialog-input:focus{border-color:#7b9b87;box-shadow:0 0 0 2px #7b9b871a}
#dialog-error{color:#b54e48;font-size:12px;margin:8px 0}
.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:22px}
#dialog-submit{background:#426958;border-color:#426958;color:#fff}
#dialog-submit.danger{background:#b8554d;border-color:#b8554d}
@media(max-width:640px){#content .cm-editor{font-size:16px}#content .cm-content{padding:16px 0}#content .cm-line{padding:0 16px}}

/* 链接操作只在点击时出现，不占用记事本的常驻空间。 */
.link-menu{position:fixed;z-index:4;width:230px;max-width:calc(100vw - 16px);padding:5px;background:#fff;border:1px solid #ddd;border-radius:6px;box-shadow:0 5px 18px #00000018}
.link-menu-url{padding:7px 10px 9px;color:#999;font-size:11px;line-height:1.5;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border-bottom:1px solid #eee;margin-bottom:4px}
.link-menu .menu-item:focus-visible{background:#f0f0f0;outline:2px solid #a0b1a5;outline-offset:-2px}
.link-menu a.menu-item{text-decoration:none}