:root{
  --bg:#fafafa;--text:#282b30;--sub:#8a8f96;--line:#e6e6e3;--ink:#282b30;
  --surface:#fff;--soft:#f4f4f2;--hover:#f1f1ef;--on-ink:#fafafa;
  --scroll-thumb:#ccc;--border-strong:#d7d7d7;--glass:rgba(250,250,250,.94);--danger:#d05f56;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color-scheme:light;
}
html[data-theme=dark]{
  --bg:#282b30;--text:#e4e6e8;--sub:#a8adb4;--line:#3d4249;--ink:#f0f1f2;
  --surface:#30343a;--soft:#353940;--hover:#3d424a;--on-ink:#282b30;
  --scroll-thumb:#6d747d;--border-strong:#555c66;--glass:rgba(40,43,48,.95);--danger:#e5867d;
  color-scheme:dark;
}

*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--text);font:14px/1.7 var(--sans);-webkit-font-smoothing:antialiased;transition:background .2s,color .2s}

/* 主题切换按钮 */
.theme-toggle{display:inline-flex;align-items:center;gap:7px;border:0;background:transparent;color:var(--sub);font:11px var(--sans);letter-spacing:.08em;padding:2px;cursor:pointer;transition:color .2s}
.theme-toggle:hover{color:var(--ink)}
.theme-toggle svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.theme-toggle .theme-moon{display:none}
html[data-theme=dark] .theme-toggle .theme-sun{display:none}
html[data-theme=dark] .theme-toggle .theme-moon{display:block}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:14px max(20px,env(safe-area-inset-left)) 14px max(20px,env(safe-area-inset-right));background:var(--glass);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar h1{margin:0;font-size:15px;font-weight:600;letter-spacing:.06em}
.top-actions{display:flex;align-items:center;gap:14px}

/* 布局:尽量用满宽 */
.board{max-width:1400px;margin:0 auto;padding:26px max(28px,5vw) 90px}

/* 便签输入卡 */
.compose-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:22px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.compose-foot{display:flex;align-items:center;gap:12px;margin-top:10px}
.compose-count{flex:1;text-align:right;color:var(--sub);font-size:12px;font-variant-numeric:tabular-nums}

/* 过期下拉(自绘) */
.ttl-field{position:relative;display:inline-flex;align-items:center;gap:8px}
.ttl-select{appearance:none;-webkit-appearance:none;min-width:92px;text-align:left;border:1px solid var(--border-strong);border-radius:8px;background:var(--surface);color:var(--text);font:12px var(--sans);padding:6px 26px 6px 11px;outline:none;cursor:pointer;transition:border-color .15s;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center;background-size:13px}
.ttl-select:hover{border-color:var(--sub)}
.ttl-select[aria-expanded=true]{border-color:var(--ink);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 15l6-6 6 6' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
.dd-panel{position:absolute;left:0;bottom:calc(100% + 6px);z-index:20;min-width:110px;background:var(--surface);border:1px solid var(--border-strong);border-radius:10px;padding:4px;box-shadow:0 8px 30px rgba(0,0,0,.14);animation:pop .14s ease}
.dd-panel[hidden]{display:none}
.dd-opt{display:block;width:100%;text-align:left;border:0;border-radius:7px;background:transparent;color:var(--text);font:13px var(--sans);padding:7px 12px;cursor:pointer;transition:background .12s}
.dd-opt:hover{background:var(--hover)}
.dd-opt.on{background:var(--soft);color:var(--ink);font-weight:600}

.login-btn{border:0;border-radius:8px;background:var(--ink);color:var(--on-ink);font:13px var(--sans);letter-spacing:.04em;padding:8px 20px;cursor:pointer;transition:background .15s,opacity .15s}
.login-btn:hover{background:var(--text)}
.login-btn:disabled{opacity:.4;cursor:default}

/* 便签网格:手机一行一个,桌面一行两个 */
.notes{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:700px){.notes{grid-template-columns:repeat(2,1fr)}}
.note-card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:12px;box-shadow:0 1px 2px rgba(0,0,0,.03);transition:border-color .15s,box-shadow .15s;animation:pop .18s ease}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
.note-card:hover{border-color:var(--border-strong);box-shadow:0 4px 16px rgba(0,0,0,.06)}
.note-card.pinned{border-color:var(--sub);background:var(--soft)}
.note-card.pinned::before{content:"";position:absolute;top:0;right:0;border:9px solid transparent;border-top-color:var(--ink);border-right-color:var(--ink);border-radius:0 12px 0 4px}
.note-body{flex:1;white-space:pre-wrap;overflow-wrap:anywhere;font-size:14px;color:var(--text);cursor:pointer}
.note-body:hover{color:var(--ink)}
/* 全屏编辑浮层 */
.edit-overlay[hidden]{display:none}
.edit-overlay{position:fixed;inset:0;z-index:100;display:grid;place-items:center;background:rgba(0,0,0,.35);backdrop-filter:blur(3px);padding:20px}
.edit-modal{width:min(880px,100%);max-height:90vh;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border-strong);border-radius:14px;padding:24px 26px 18px;box-shadow:0 16px 60px rgba(0,0,0,.25);animation:pop .18s ease}
.edit-float{flex:1;min-height:0;display:flex;flex-direction:column}
.edit-float textarea{flex:1;min-height:55vh;font-size:16px;resize:none}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--sub);cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.icon-btn:hover{background:var(--hover);color:var(--ink);border-color:var(--border-strong)}
.icon-btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.edit-overlay.fullscreen{padding:0;backdrop-filter:none}
.edit-overlay.fullscreen .edit-modal{width:100%;max-width:none;height:100vh;max-height:100vh;border:0;border-radius:0;padding:28px clamp(20px,8vw,120px) 20px}
.edit-overlay.fullscreen .edit-float textarea{min-height:0}
.edit-bar{display:flex;align-items:center;gap:10px;margin-top:14px}
.edit-count{flex:1;color:var(--sub);font-size:12px;font-variant-numeric:tabular-nums}
.edit-save{border:0;border-radius:8px;background:var(--ink);color:var(--on-ink);font:13px var(--sans);padding:8px 24px;cursor:pointer}
.edit-save:hover{background:var(--text)}
.edit-cancel{border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--sub);font:13px var(--sans);padding:8px 24px;cursor:pointer}
.edit-cancel:hover{border-color:var(--border-strong);color:var(--text)}

/* 删除确认 */
.confirm-modal{width:min(340px,100%);background:var(--surface);border:1px solid var(--border-strong);border-radius:14px;padding:24px 26px 18px;box-shadow:0 16px 60px rgba(0,0,0,.25);animation:pop .18s ease}
.confirm-modal p{margin:0 0 8px;font-size:15px;color:var(--text)}
.del-confirm{border:0;border-radius:8px;background:var(--danger);color:#fff;font:13px var(--sans);padding:8px 24px;cursor:pointer}
.del-confirm:hover{filter:brightness(1.08)}
.note-time.expiring{color:var(--danger)}
.note-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;border-top:1px solid var(--line);padding-top:10px}
.note-time{color:var(--sub);font-size:11px;font-variant-numeric:tabular-nums;white-space:nowrap}
.note-acts{display:flex;gap:2px}
.note-act{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border:0;border-radius:6px;background:transparent;color:var(--sub);cursor:pointer;transition:background .15s,color .15s}
.note-act:hover{background:var(--hover);color:var(--ink)}
.note-act.del:hover{color:var(--danger)}
.note-act svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.note-card.pinned .note-act.pin{color:var(--ink)}

.empty{grid-column:1/-1;text-align:center;color:var(--sub);padding:60px 0;font-size:13px;letter-spacing:.04em}

/* 浮动标签输入框(登录口令 / 便签输入 / 编辑框共用) */
.float-field{position:relative}
.float-field input,.float-field textarea{width:100%;border:0;border-bottom:1px solid var(--border-strong);border-radius:0;background:transparent;color:var(--text);font:15px/1.7 var(--sans);padding:24px 2px 9px;outline:none;transition:border-color .15s}
.float-field textarea{min-height:64px;resize:vertical}
.float-field input:focus,.float-field textarea:focus{border-bottom-color:var(--ink)}
.float-field label{position:absolute;left:2px;top:25px;color:var(--sub);font-size:15px;pointer-events:none;transform-origin:0 0;transition:transform .18s ease,color .18s ease}
.float-field input:focus~label,.float-field textarea:focus~label,
.float-field input:not(:placeholder-shown)~label,.float-field textarea:not(:placeholder-shown)~label{transform:translateY(-22px) scale(.7);color:var(--ink)}
/* 登录页:占满屏宽的浮动标签输入 */
.login-body{display:grid;place-items:center;min-height:100vh;padding:0 6vw}
.login-wrap{width:min(720px,100%)}
.login-line{display:flex;align-items:flex-end;gap:18px}
.login-line .float-field{flex:1}
.login-line .float-field input{font-size:17px;padding-top:26px}
.login-line .float-field label{top:27px;font-size:17px}
.go-btn{display:inline-flex;align-items:center;justify-content:center;flex:none;width:46px;height:46px;margin-bottom:-2px;border:0;border-radius:50%;background:var(--ink);color:var(--on-ink);cursor:pointer;transition:background .15s,transform .15s}
.go-btn:hover{background:var(--text)}
.go-btn:active{transform:scale(.92)}
.go-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.login-error{margin:16px 2px 0;color:var(--danger);font-size:13px}
.login-error:empty{display:none}

/* toast */
.app-toast{position:fixed;inset:auto auto max(22px,env(safe-area-inset-bottom)) 50%;margin:0;max-width:calc(100vw - 32px);width:max-content;padding:10px 16px;border:1px solid transparent;border-radius:4px;background:var(--ink);color:var(--on-ink);font:13px/1.6 var(--sans);box-shadow:0 4px 20px rgba(0,0,0,.1);z-index:10000;opacity:0;visibility:hidden;transform:translate(-50%,6px);transition:opacity .18s,transform .18s,visibility .18s;pointer-events:none;text-align:center}
.app-toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}

/* 细滚动条 */
html,html *{scrollbar-width:thin;scrollbar-color:var(--scroll-thumb) transparent}
html::-webkit-scrollbar,html *::-webkit-scrollbar{width:6px;height:6px}
html::-webkit-scrollbar-track,html *::-webkit-scrollbar-track{background:transparent}
html::-webkit-scrollbar-thumb,html *::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:6px}

@media(max-width:520px){.board{padding:16px 14px 60px}}