:root{
  --bg:#f6f7f9;--panel:#ffffff;--col:#eef0f3;--line:#dfe2e7;--text:#1c2024;--muted:#60646c;--faint:#8b8d98;
  --accent:#2f6fe4;--accent-ink:#fff;--danger:#d93036;--warn:#c97a00;--shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
  --radius:10px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#111214;--panel:#1b1c1f;--col:#16171a;--line:#2c2e33;--text:#ecedee;--muted:#a0a3aa;--faint:#6f727a;
    --accent:#4d8bf5;--shadow:0 1px 2px rgba(0,0,0,.4);}
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.4}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
.app{display:flex;flex-direction:column;height:100vh}
header{display:flex;align-items:center;gap:12px;padding:12px 18px;background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap}
header h1{font-size:16px;font-weight:700;margin:0;margin-right:8px;white-space:nowrap}
.tabs{display:flex;gap:4px;background:var(--col);padding:3px;border-radius:8px}
.tabs a{padding:5px 12px;border-radius:6px;text-decoration:none;color:var(--muted);font-weight:500}
.tabs a.on{background:var(--panel);color:var(--text);box-shadow:var(--shadow)}
.spacer{flex:1}
.btn{border:1px solid var(--line);background:var(--panel);padding:6px 12px;border-radius:7px;font-weight:500}
.btn:hover{border-color:var(--faint)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.danger{color:var(--danger)}
.btn.danger.armed{background:var(--danger);border-color:var(--danger);color:#fff}
.btn:disabled{opacity:.5;cursor:not-allowed}
.filters{display:flex;gap:8px;padding:10px 18px;flex-wrap:wrap;align-items:center;border-bottom:1px solid var(--line);background:var(--panel)}
.filters input,.filters select{border:1px solid var(--line);background:var(--bg);border-radius:7px;padding:6px 9px}
.filters input[type=search]{min-width:200px}
.chip-toggle{border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:5px 11px;font-weight:500;color:var(--muted)}
.chip-toggle.on{background:var(--accent);border-color:var(--accent);color:#fff}
.notice{padding:8px 18px;background:#fff4d6;color:#6b4b00;font-size:13px;display:none}
@media (prefers-color-scheme:dark){.notice{background:#3a2f12;color:#f3d78a}}
.notice.show{display:block}
main{flex:1;overflow:auto}
/* Board */
.board{display:flex;gap:12px;padding:16px 18px;min-height:100%;align-items:flex-start}
.column{background:var(--col);border-radius:var(--radius);min-width:270px;width:270px;flex-shrink:0;display:flex;flex-direction:column;max-height:calc(100vh - 150px)}
.column.drop{outline:2px dashed var(--accent);outline-offset:-2px}
.col-head{display:flex;align-items:center;gap:8px;padding:10px 12px 6px;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.col-head .count{background:var(--line);border-radius:999px;padding:1px 8px;font-size:11px;color:var(--text)}
.col-body{padding:6px 8px 10px;overflow-y:auto;display:flex;flex-direction:column;gap:8px;min-height:60px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px;box-shadow:var(--shadow);cursor:pointer;user-select:none}
.card:hover{border-color:var(--faint)}
.card.dragging{opacity:.4}
.card .title{font-weight:500;margin:6px 0 8px;word-break:break-word}
.meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.key{font-weight:600;color:var(--faint);font-size:12px}
.type{display:inline-flex;align-items:center;gap:5px;font-size:11px;font-weight:600;padding:2px 7px;border-radius:5px;white-space:nowrap}
.type i{width:8px;height:8px;border-radius:2px;display:inline-block}
.prio{font-size:11px;font-weight:700;white-space:nowrap}
.due.over{color:var(--danger);font-weight:600}
.client{background:var(--col);border-radius:4px;padding:1px 6px;font-size:11px;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.av{width:22px;height:22px;border-radius:50%;object-fit:cover;flex-shrink:0;background:var(--line)}
.av.none{border:1.5px dashed var(--faint);background:transparent}
.card .foot{display:flex;align-items:center;justify-content:space-between;margin-top:6px}
.empty-col{color:var(--faint);font-size:12px;text-align:center;padding:14px 0}
/* Backlog */
.backlog{padding:16px 18px;max-width:1100px}
.quickadd{display:flex;gap:8px;margin-bottom:14px}
.quickadd input{flex:1;border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:9px 12px}
.quickadd select{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:8px}
.section-title{font-weight:600;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em;margin:18px 0 8px;display:flex;gap:8px;align-items:center}
.rows{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.row{display:grid;grid-template-columns:78px 150px 1fr 90px 130px 90px 96px;gap:10px;align-items:center;padding:9px 12px;border-bottom:1px solid var(--line);cursor:pointer}
.row:last-child{border-bottom:none}
.row:hover{background:var(--col)}
.row .t{font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row .who{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);overflow:hidden;white-space:nowrap}
.row .btn{padding:3px 8px;font-size:12px}
.empty{padding:28px;text-align:center;color:var(--faint)}
@media (max-width:820px){
  .row{grid-template-columns:70px 1fr 80px;}
  .row .hide-sm{display:none}
}
/* Modal */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:none;align-items:flex-start;justify-content:center;padding:40px 12px;overflow-y:auto;z-index:20}
.overlay.show{display:flex}
.modal{background:var(--panel);border-radius:12px;width:100%;max-width:860px;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.m-head{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line)}
.m-head .x{margin-left:auto;border:none;background:none;font-size:20px;color:var(--muted);line-height:1}
.m-body{display:grid;grid-template-columns:1fr 260px;gap:0}
.m-main{padding:16px 18px;border-right:1px solid var(--line);min-width:0}
.m-side{padding:16px 18px;display:flex;flex-direction:column;gap:12px}
@media (max-width:720px){.m-body{grid-template-columns:1fr}.m-main{border-right:none;border-bottom:1px solid var(--line)}}
.f-title{width:100%;font-size:18px;font-weight:600;border:1px solid transparent;border-radius:6px;padding:6px 8px;background:transparent}
.f-title:hover,.f-title:focus{border-color:var(--line);outline:none;background:var(--bg)}
label.l{display:block;font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px}
.m-side select,.m-side input,.m-main textarea,.picker input{width:100%;border:1px solid var(--line);background:var(--bg);border-radius:7px;padding:7px 9px}
.m-main textarea{min-height:140px;resize:vertical;margin-top:4px}
.picker{position:relative}
.picker .sel{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--bg);border-radius:7px;padding:5px 8px;cursor:pointer;min-height:34px}
.picker .menu{position:absolute;left:0;right:0;top:calc(100% + 4px);background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.15);z-index:5;display:none;padding:6px}
.picker.open .menu{display:block}
.picker .opt{display:flex;align-items:center;gap:8px;padding:6px;border-radius:6px;cursor:pointer}
.picker .opt:hover{background:var(--col)}
.picker .hint{font-size:12px;color:var(--faint);padding:6px}
.linkbtn{background:none;border:none;color:var(--accent);padding:0;font-size:12px;font-weight:500}
.comments{margin-top:18px}
.comment{display:flex;gap:10px;margin:12px 0}
.comment .bubble{flex:1;min-width:0}
.comment .who{font-weight:600;font-size:13px}
.comment .when{color:var(--faint);font-size:12px;margin-left:6px;font-weight:400}
.comment .txt{white-space:pre-wrap;word-break:break-word;margin-top:2px}
.addc textarea{min-height:64px}
.history{font-size:12px;color:var(--muted);margin-top:18px}
.history summary{cursor:pointer;font-weight:600}
.history li{margin:4px 0}
.m-foot{display:flex;gap:8px;padding:12px 18px;border-top:1px solid var(--line);align-items:center}
.small{font-size:12px;color:var(--faint)}
.toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);background:var(--text);color:var(--bg);padding:9px 14px;border-radius:8px;font-size:13px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:30}
.toast.show{opacity:1}

/* Auth + user */
.auth{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.auth-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:28px;width:100%;max-width:380px;box-shadow:var(--shadow)}
.auth-card h1{font-size:20px;margin:0 0 4px}
.auth-card p{color:var(--muted);margin:0 0 18px}
.auth-card input{width:100%;border:1px solid var(--line);background:var(--bg);border-radius:8px;padding:10px 12px;margin-bottom:10px}
.auth-card .btn{width:100%;padding:10px}
.auth-msg{margin-top:12px;font-size:13px;color:var(--muted)}
.userbox{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.userbox .linkbtn{font-size:13px}
.av.initials{display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:10px;font-weight:700}
.hidden{display:none!important}