:root{--bg: #f6f7f9;--surface: #ffffff;--surface-2: #f1f3f5;--border: #e3e6ea;--border-strong: #cfd4da;--text: #1f2328;--text-soft: #5f6770;--primary: #16a34a;--primary-hover: #15803d;--primary-soft: #dcfce7;--danger: #d1242f;--warning: #b45309;--warning-soft: #fef3c7;--shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 4px 16px rgb(0 0 0 / 5%);--radius: 10px;--topbar-h: 52px;color-scheme:light}:root[data-theme=dark]{--bg: #121417;--surface: #1b1e22;--surface-2: #23272c;--border: #2e3338;--border-strong: #3c4249;--text: #e6e8eb;--text-soft: #9aa2ab;--primary: #22c55e;--primary-hover: #16a34a;--primary-soft: #14532d;--danger: #f85149;--warning: #f59e0b;--warning-soft: #422006;--shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 4px 16px rgb(0 0 0 / 30%);color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:Segoe UI,system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;font-size:14px;background:var(--bg);color:var(--text)}a{color:inherit}button,input,select,textarea{font:inherit;color:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.45rem .9rem;border:1px solid var(--border-strong);border-radius:7px;background:var(--surface);font-weight:600;line-height:1.25rem;cursor:pointer;text-decoration:none;white-space:nowrap}.btn:hover{background:var(--surface-2)}.btn:disabled{opacity:.55;cursor:default}.btn:focus-visible,.input:focus-visible,.icon-btn:focus-visible,.tab:focus-visible{outline:2px solid var(--primary);outline-offset:1px}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{color:var(--danger)}.btn-small{padding:.25rem .6rem;font-size:13px}.btn-ghost{border-color:transparent;background:transparent}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid transparent;border-radius:7px;background:transparent;cursor:pointer;font-size:16px}.icon-btn:hover{background:var(--surface-2)}.input{width:100%;padding:.45rem .7rem;border:1px solid var(--border-strong);border-radius:7px;background:var(--surface);min-width:0}.field{display:flex;flex-direction:column;gap:.3rem;margin-bottom:.8rem}.field>span{font-weight:600;font-size:13px}.row{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.grow{flex:1 1 auto}.muted{color:var(--text-soft)}.small{font-size:12.5px}.error{color:var(--danger)}.warning{color:var(--warning);font-weight:600}.badge{display:inline-flex;align-items:center;gap:.25rem;padding:.05rem .5rem;border-radius:999px;font-size:12px;font-weight:600;background:var(--surface-2);color:var(--text-soft);white-space:nowrap}.badge-primary{background:var(--primary-soft);color:var(--primary)}.badge-warning{background:var(--warning-soft);color:var(--warning)}.appbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:.75rem;height:var(--topbar-h);padding:0 1rem;background:var(--surface);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:16px;text-decoration:none}.brand img{width:26px;height:26px}.page{max-width:1200px;margin:0 auto;padding:1.25rem 1rem 3rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem 1.5rem}.center-card{max-width:30rem;margin:10vh auto 0;text-align:center}.center-card h1{margin-top:0}.toolbar{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap;margin-bottom:1rem}.tabs{display:flex;gap:.25rem;flex-wrap:wrap;border-bottom:1px solid var(--border);margin-bottom:1rem}.tab{padding:.5rem .75rem;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;background:none;font-weight:600;color:var(--text-soft);cursor:pointer}.tab[aria-selected=true]{color:var(--text);border-bottom-color:var(--primary)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem}.board-card{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .15s,border-color .15s}.board-card:hover{box-shadow:var(--shadow);border-color:var(--border-strong)}.board-thumb{display:block;aspect-ratio:16 / 10;background:var(--surface-2);border-bottom:1px solid var(--border);overflow:hidden}.board-thumb img{width:100%;height:100%;object-fit:contain}:root[data-theme=dark] .board-thumb img{filter:invert(.93) hue-rotate(180deg)}.board-thumb .placeholder{display:grid;place-items:center;height:100%;font-size:34px;opacity:.35}.board-body{padding:.7rem .85rem .8rem;display:flex;flex-direction:column;gap:.3rem}.board-title{font-weight:700;text-decoration:none;overflow-wrap:anywhere}.board-title:hover{color:var(--primary)}.board-meta{display:flex;gap:.35rem;flex-wrap:wrap;align-items:center}.board-actions{position:absolute;top:.4rem;right:.4rem;display:flex;gap:.25rem}.board-actions .icon-btn{background:var(--surface);border-color:var(--border);width:30px;height:30px;font-size:14px}.empty{padding:3rem 1rem;text-align:center;color:var(--text-soft)}.menu{position:absolute;z-index:50;min-width:190px;padding:.3rem;background:var(--surface);border:1px solid var(--border);border-radius:9px;box-shadow:var(--shadow)}.menu button{display:block;width:100%;padding:.45rem .6rem;border:none;border-radius:6px;background:none;text-align:left;cursor:pointer}.menu button:hover{background:var(--surface-2)}.menu .danger{color:var(--danger)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:grid;place-items:center;padding:1rem;background:#00000073}.modal{width:100%;max-width:40rem;max-height:calc(100vh - 2rem);overflow:auto;background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}.modal-small{max-width:26rem}.modal-header{display:flex;align-items:center;gap:.5rem;padding:1rem 1.25rem .5rem}.modal-header h2{margin:0;font-size:17px;flex:1}.modal-body{padding:.5rem 1.25rem 1.25rem}.modal-section{margin-top:1.1rem}.modal-section h3{margin:0 0 .5rem;font-size:14px}.choice-list{display:grid;gap:.4rem}.choice{display:flex;gap:.6rem;padding:.55rem .7rem;border:1px solid var(--border);border-radius:8px;cursor:pointer}.choice:has(input:checked){border-color:var(--primary);background:var(--primary-soft)}.choice input{accent-color:var(--primary);margin-top:.2rem}.choice strong{display:block}.list{list-style:none;margin:0;padding:0}.list li{display:flex;align-items:center;gap:.5rem;padding:.5rem 0;border-top:1px solid var(--border)}.list li:first-child{border-top:none}.suggestions{position:relative}.suggestions .menu{left:0;right:0;top:100%}.board-page{display:flex;flex-direction:column;height:100%}.board-topbar{display:flex;align-items:center;gap:.5rem;height:var(--topbar-h);padding:0 .75rem;background:var(--surface);border-bottom:1px solid var(--border);flex:none}.board-topbar .title{font-weight:700;font-size:15px;padding:.2rem .4rem;border-radius:6px;border:1px solid transparent;background:none;max-width:40vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.board-topbar button.title:hover{border-color:var(--border);cursor:text}.board-topbar input.title{border-color:var(--primary)}.board-canvas{position:relative;flex:1 1 auto;min-height:0}.avatars{display:flex}.avatar{display:grid;place-items:center;width:28px;height:28px;margin-left:-6px;border:2px solid var(--surface);border-radius:50%;color:#fff;font-size:11px;font-weight:700}.avatars .avatar:first-child{margin-left:0}.side-panel{position:absolute;top:0;right:0;bottom:0;z-index:20;width:min(360px,100%);display:flex;flex-direction:column;background:var(--surface);border-left:1px solid var(--border);box-shadow:var(--shadow)}.side-panel header{display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;border-bottom:1px solid var(--border)}.side-panel header h2{margin:0;font-size:15px;flex:1}.side-panel .content{padding:.75rem 1rem;overflow:auto;flex:1}.version-preview{border:1px solid var(--border);border-radius:8px;margin:.5rem 0;background:#fff}.version-preview svg{width:100%;height:auto;max-height:240px;display:block}.banner{display:flex;align-items:center;gap:.5rem;padding:.45rem .9rem;font-size:13px;background:var(--warning-soft);color:var(--warning);border-bottom:1px solid var(--border)}.toast{position:fixed;left:50%;bottom:1.5rem;z-index:200;transform:translate(-50%);padding:.6rem 1rem;border-radius:8px;background:#1f2328;color:#fff;box-shadow:var(--shadow)}.toast.error{background:var(--danger)}@media(max-width:640px){.board-topbar .hide-mobile{display:none}.board-topbar .title{max-width:45vw}}