:root{--bh-bg: #ffffff;--bh-bg-alt: #f4f5f7;--bh-surface: #ffffff;--bh-border: #e3e5e8;--bh-text: #1b1d21;--bh-text-dim: #6a6f76;--bh-primary: #3a6df0;--bh-primary-text: #ffffff;--bh-danger: #d6435b;--bh-radius: 10px;--bh-radius-sm: 6px;--bh-shadow: 0 6px 24px rgba(0, 0, 0, .12);--bh-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}@media(prefers-color-scheme:dark){:root{--bh-bg: #16181d;--bh-bg-alt: #1d2026;--bh-surface: #20242b;--bh-border: #2c313a;--bh-text: #e8eaed;--bh-text-dim: #9aa0a8;--bh-primary: #5b86f5;--bh-primary-text: #0c0f14;--bh-danger: #ff6b81;--bh-shadow: 0 6px 24px rgba(0, 0, 0, .45)}}:root[data-theme=light]{--bh-bg: #ffffff;--bh-bg-alt: #f4f5f7;--bh-surface: #ffffff;--bh-border: #e3e5e8;--bh-text: #1b1d21;--bh-text-dim: #6a6f76;--bh-primary: #3a6df0;--bh-primary-text: #ffffff;--bh-shadow: 0 6px 24px rgba(0, 0, 0, .12)}:root[data-theme=dark]{--bh-bg: #16181d;--bh-bg-alt: #1d2026;--bh-surface: #20242b;--bh-border: #2c313a;--bh-text: #e8eaed;--bh-text-dim: #9aa0a8;--bh-primary: #5b86f5;--bh-primary-text: #0c0f14;--bh-shadow: 0 6px 24px rgba(0, 0, 0, .45)}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%}body{font-family:var(--bh-font);color:var(--bh-text);background:var(--bh-bg);font-size:14px;line-height:1.45}#app{height:100%}.bh-app{display:flex;flex-direction:column;height:100%;background:var(--bh-bg)}.bh-app--standalone{max-width:720px;margin:0 auto;border-left:1px solid var(--bh-border);border-right:1px solid var(--bh-border)}.bh-app--overlay{width:100%;height:100%;font-size:13px}.bh-header{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;border-bottom:1px solid var(--bh-border);background:var(--bh-surface)}.bh-header__title{display:flex;align-items:baseline;gap:8px;min-width:0}.bh-header__brand{font-weight:700;color:var(--bh-primary)}.bh-header__page{color:var(--bh-text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}.bh-header__actions{display:flex;gap:4px}.bh-main{flex:1 1 auto;min-height:0;display:flex;flex-direction:column}.bh-timeline-wrap{position:relative;flex:1 1 auto;min-height:0;display:flex;flex-direction:column}.bh-jump{position:absolute;right:14px;bottom:12px;border:none;border-radius:16px;padding:6px 12px;font:inherit;font-size:12px;cursor:pointer;background:var(--bh-primary);color:#fff;box-shadow:0 2px 8px #00000040;z-index:3}.bh-locate-flash{animation:bh-locate 1.6s ease;border-radius:var(--bh-radius-sm)}@keyframes bh-locate{0%,60%{background:#ffd54f80}to{background:transparent}}.bh-link-inline{color:var(--bh-primary);text-decoration:underline;word-break:break-all}.bh-timeline{flex:1 1 auto;min-height:0;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:2px}.bh-timeline__top,.bh-timeline__empty{text-align:center;color:var(--bh-text-dim);font-size:12px;padding:8px 0}.bh-day{display:flex;align-items:center;text-align:center;color:var(--bh-text-dim);font-size:11px;text-transform:uppercase;letter-spacing:.04em;margin:10px 0 4px}.bh-day:before,.bh-day:after{content:"";flex:1;height:1px;background:var(--bh-border)}.bh-day span{padding:0 10px}.bh-msg{padding:2px 0}.bh-msg--cont{margin-top:-2px}.bh-msg__head{display:flex;align-items:baseline;gap:8px;margin-top:8px}.bh-msg__name{font-weight:600}.bh-msg__time{color:var(--bh-text-dim);font-size:11px}.bh-msg__body{display:flex;flex-direction:column;gap:4px}.bh-msg__text{white-space:pre-wrap;overflow-wrap:anywhere}.bh-msg__text--emote{color:var(--bh-text-dim)}.bh-anchor{display:inline-flex;align-items:center;gap:6px;max-width:100%;text-align:left;background:var(--bh-bg-alt);border:1px solid var(--bh-border);border-radius:var(--bh-radius-sm);padding:6px 10px;cursor:pointer;color:var(--bh-text);font:inherit}.bh-anchor:hover{border-color:var(--bh-primary)}.bh-anchor__quote{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--bh-text-dim)}.bh-anchor--broken{opacity:.7;border-style:dashed;border-color:var(--bh-border)}.bh-anchor--broken .bh-anchor__quote{text-decoration:line-through}.bh-anchor--broken:hover{border-color:#f59e0b}.bh-anchor__broken-tag{flex:none;font-size:11px;color:#b45309;background:#f59e0b26;border-radius:999px;padding:1px 7px}.bh-image{display:block;border:1px solid var(--bh-border);border-radius:var(--bh-radius-sm);overflow:hidden;padding:0;background:var(--bh-bg-alt);cursor:zoom-in;max-width:280px}.bh-image__thumb{display:block;width:100%;height:auto}.bh-image__loading{display:flex;align-items:center;justify-content:center;min-width:120px;min-height:80px;color:var(--bh-text-dim)}.bh-image--missing{padding:12px;color:var(--bh-text-dim);font-size:12px}.bh-lightbox{position:fixed;inset:0;background:#000000d1;display:flex;align-items:center;justify-content:center;z-index:1000;padding:24px}.bh-lightbox__img{max-width:100%;max-height:100%;border-radius:var(--bh-radius);cursor:default}.bh-lightbox__close{position:absolute;top:14px;right:18px;font-size:28px;line-height:1;background:none;border:none;color:#fff;cursor:pointer}.bh-footer{border-top:1px solid var(--bh-border);background:var(--bh-surface)}.bh-composer{padding:8px 10px}.bh-composer__error{color:var(--bh-danger);font-size:12px;margin-bottom:6px}.bh-composer__row{display:flex;align-items:flex-end;gap:6px}.bh-composer__tools{display:flex;gap:2px}.bh-composer__input{flex:1 1 auto;resize:none;max-height:140px;min-height:36px;padding:8px 10px;border:1px solid var(--bh-border);border-radius:var(--bh-radius-sm);background:var(--bh-bg);color:var(--bh-text);font:inherit}.bh-composer__input:focus{outline:2px solid var(--bh-primary);outline-offset:-1px}.bh-composer__send{flex:0 0 auto}.bh-attach{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}.bh-attach__img{position:relative;width:64px;height:64px;border-radius:var(--bh-radius-sm);overflow:hidden;border:1px solid var(--bh-border)}.bh-attach__img img{width:100%;height:100%;object-fit:cover}.bh-attach__anchor{display:inline-flex;align-items:center;gap:6px;background:var(--bh-bg-alt);border:1px solid var(--bh-border);border-radius:var(--bh-radius-sm);padding:4px 8px;font-size:12px}.bh-attach__anchor-quote{color:var(--bh-text-dim)}.bh-attach__remove{position:absolute;top:2px;right:2px;width:18px;height:18px;border-radius:50%;border:none;background:#0009;color:#fff;font-size:12px;line-height:1;cursor:pointer}.bh-attach__anchor .bh-attach__remove{position:static;background:transparent;color:var(--bh-text-dim)}.bh-auth{border-top:1px solid var(--bh-border);padding:6px 10px;font-size:12px}.bh-auth__bar{display:flex;align-items:center;justify-content:space-between;gap:8px}.bh-auth__who{color:var(--bh-text-dim)}.bh-auth__actions{display:flex;gap:10px}.bh-auth__panel{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.bh-auth__error{color:var(--bh-danger);margin-top:4px}.bh-settings{position:absolute;right:10px;top:48px;z-index:50;width:260px;background:var(--bh-surface);border:1px solid var(--bh-border);border-radius:var(--bh-radius);box-shadow:var(--bh-shadow);padding:10px}.bh-settings__header{display:flex;justify-content:space-between;align-items:center;font-weight:600;margin-bottom:8px}.bh-settings__row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 0}.bh-banner{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;background:var(--bh-bg-alt);border-bottom:1px solid var(--bh-border);font-size:13px}.bh-banner__actions{display:flex;align-items:center;gap:8px}.bh-loading{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--bh-text-dim)}.bh-spinner{width:22px;height:22px;border:2px solid var(--bh-border);border-top-color:var(--bh-primary);border-radius:50%;animation:bh-spin .8s linear infinite}@keyframes bh-spin{to{transform:rotate(360deg)}}.bh-fatal{margin:24px;padding:14px;border:1px solid var(--bh-danger);border-radius:var(--bh-radius);color:var(--bh-danger);background:color-mix(in srgb,var(--bh-danger) 8%,transparent)}.bh-poweredby{text-align:center;color:var(--bh-text-dim);font-size:11px;padding:6px;border-top:1px solid var(--bh-border)}.bh-modal{position:fixed;inset:0;background:#00000073;display:flex;align-items:center;justify-content:center;z-index:900;padding:16px}.bh-modal__card{background:var(--bh-surface);border-radius:var(--bh-radius);box-shadow:var(--bh-shadow);padding:18px;width:320px;max-width:100%}.bh-modal__title{margin:0 0 4px;font-size:18px}.bh-modal__hint{margin:0 0 12px;color:var(--bh-text-dim)}.bh-modal__actions{display:flex;justify-content:flex-end;gap:8px;margin-top:12px}.bh-input{padding:7px 9px;border:1px solid var(--bh-border);border-radius:var(--bh-radius-sm);background:var(--bh-bg);color:var(--bh-text);font:inherit}.bh-input:focus{outline:2px solid var(--bh-primary);outline-offset:-1px}.bh-btn{padding:7px 12px;border-radius:var(--bh-radius-sm);border:1px solid var(--bh-border);background:var(--bh-bg-alt);color:var(--bh-text);font:inherit;cursor:pointer}.bh-btn--primary{background:var(--bh-primary);color:var(--bh-primary-text);border-color:transparent}.bh-btn--ghost{background:transparent}.bh-btn:disabled,.bh-btn--disabled{opacity:.5;cursor:not-allowed}.bh-link{background:none;border:none;color:var(--bh-primary);cursor:pointer;font:inherit;padding:0}.bh-iconbtn{background:none;border:none;cursor:pointer;font-size:16px;line-height:1;padding:4px 6px;border-radius:var(--bh-radius-sm);color:var(--bh-text)}.bh-iconbtn:hover{background:var(--bh-bg-alt)}.bh-iconbtn--active{background:var(--bh-primary);color:#fff}.bh-iconbtn--active:hover{background:var(--bh-primary)}.bh-iconbtn__badge{font-size:10px;font-weight:600;margin-left:1px;vertical-align:super}.bh-landing{max-width:720px;margin:0 auto;padding:40px 24px}.bh-landing__hero h1{margin:0;font-size:40px;color:var(--bh-primary)}.bh-landing__hero p{color:var(--bh-text-dim);font-size:16px}.bh-landing__section{margin-top:32px;padding-top:20px;border-top:1px solid var(--bh-border)}.bh-landing__hint{color:var(--bh-text-dim)}.bh-landing__todo{font-size:12px;color:var(--bh-text-dim);background:var(--bh-bg-alt);border-radius:var(--bh-radius-sm);padding:10px}.bh-bookmarklet{display:inline-block;background:var(--bh-primary);color:var(--bh-primary-text);text-decoration:none;padding:8px 16px;border-radius:var(--bh-radius-sm);font-weight:600;cursor:grab}.bh-landing__row{display:flex;gap:8px}.bh-landing__row .bh-input{flex:1}.bh-landing__footer{margin-top:40px;color:var(--bh-text-dim);font-size:12px}code{background:var(--bh-bg-alt);border-radius:4px;padding:1px 5px;font-size:.9em}