:root{
  --bg:#F0F2F9;--panel:#FAFBFE;--ink:#1F2640;--ink-2:#4A5170;--ink-3:#7C829C;--line:#DDE1EC;--line-strong:#C1C7D9;
  --accent:#3050A8;--accent-ink:#FAFBFE;--late:#8E3A3E;--off:#E8EBF3;--sel:rgba(48,80,168,.09);--drop:#3050A8;
  --ui:"Yu Gothic UI","Meiryo UI","Hiragino Sans","Noto Sans JP","Noto Sans CJK JP",system-ui,sans-serif;
  --left:372px;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#0F1220;--panel:#161A2E;--ink:#E2E6F5;--ink-2:#B5BBD4;--ink-3:#7F87A6;--line:#272C47;--line-strong:#3A4166;
  --accent:#7C95E0;--accent-ink:#0F1220;--late:#DC8387;--off:#1D2139;--sel:rgba(124,149,224,.13);--drop:#7C95E0;
  color-scheme:dark;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0F1220;--panel:#161A2E;--ink:#E2E6F5;--ink-2:#B5BBD4;--ink-3:#7F87A6;--line:#272C47;--line-strong:#3A4166;
  --accent:#7C95E0;--accent-ink:#0F1220;--late:#DC8387;--off:#1D2139;--sel:rgba(124,149,224,.13);--drop:#7C95E0;
  color-scheme:dark;
}}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 var(--ui);display:flex;flex-direction:column;min-height:100dvh}
button,select,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}

/* ---- header ---- */
.hdr{display:flex;align-items:center;gap:14px;padding:10px 16px;border-bottom:1px solid var(--line);background:var(--panel)}
.brand{display:flex;align-items:center;gap:10px;margin:0;font-weight:600;flex-shrink:0}
.logo{width:28px;height:28px;color:var(--ink);flex-shrink:0}
.brand-name{font-size:19px;letter-spacing:.04em}
.brand-sub{font-size:12px;font-weight:400;color:var(--ink-3)}
.title-input{min-width:0;flex:0 1 26ch;border:1px solid transparent;background:transparent;border-radius:7px;padding:3px 8px;font-weight:600;font-size:15px}
.title-input:hover{border-color:var(--line)}
.title-input:focus{border-color:var(--accent);outline:none;background:var(--bg)}
.privacy{margin:0 0 0 auto;font-size:12px;color:var(--accent);border:1px solid var(--accent);border-radius:999px;padding:1px 10px;white-space:nowrap}
.icon-btn{border:1px solid var(--line);background:transparent;border-radius:8px;width:34px;height:30px;padding:0}
.icon-btn:hover{border-color:var(--line-strong)}

/* ---- toolbar ---- */
.toolbar{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center;padding:8px 16px;border-bottom:1px solid var(--line)}
.grp{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.grp.files{margin-left:auto}
.sep{width:1px;height:20px;background:var(--line);margin:0 4px}
.lbl{font-size:12px;color:var(--ink-3)}
button{background:var(--panel);border:1px solid var(--line);border-radius:7px;padding:4px 11px;line-height:1.4}
button:hover:not(:disabled){border-color:var(--line-strong)}
button:disabled{opacity:.42;cursor:default}
button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
button.primary:hover{filter:brightness(1.07)}
button.danger{color:var(--late);border-color:color-mix(in srgb,var(--late) 45%,transparent)}
button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.seg{gap:0}
.seg button{border-radius:0;margin-left:-1px}
.seg button:first-child{border-radius:7px 0 0 7px;margin-left:0}
.seg button:nth-child(3){border-radius:0 7px 7px 0}
.seg button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);position:relative}
.seg #go-today{margin-left:8px;border-radius:7px}

/* ---- chart ---- */
.stage{position:relative;flex:1 1 0;min-height:340px;display:flex;background:var(--panel);border-bottom:1px solid var(--line)}
.gantt{position:relative;flex:1;min-width:0;overflow:auto;overscroll-behavior:contain}
.g-grid{display:grid;grid-template-columns:var(--left) max-content;width:max-content;min-width:100%}
.g-corner{position:sticky;top:0;left:0;z-index:4;background:var(--panel);border-bottom:1px solid var(--line-strong);border-right:1px solid var(--line-strong);display:grid;grid-template-columns:22px 1fr 66px 42px 46px;align-items:end;padding-bottom:4px;font-size:11px;color:var(--ink-3);height:46px}
.g-corner .c-name{grid-column:2}
.g-corner .c-days,.g-corner .c-pct{text-align:right;padding-right:8px}
.g-head{position:sticky;top:0;z-index:3;background:var(--panel);border-bottom:1px solid var(--line-strong)}
.g-rows{position:sticky;left:0;z-index:2;background:var(--panel);border-right:1px solid var(--line-strong)}
.head-svg,.body-svg{display:block}
.body-svg{touch-action:pan-x pan-y}

.row{display:grid;grid-template-columns:22px 1fr 66px 42px 46px;align-items:center;height:32px;border-bottom:1px solid var(--line);font-size:13px}
.row.sel{background:var(--sel)}
.row.drop-before{box-shadow:inset 0 2px 0 var(--drop)}
.row.drop-after{box-shadow:inset 0 -2px 0 var(--drop)}
.handle{cursor:grab;color:var(--ink-3);text-align:center;user-select:none;touch-action:none;font-size:12px;line-height:32px;height:32px}
.handle:hover{color:var(--ink)}
.nm{display:flex;align-items:center;min-width:0;gap:2px}
.row.child .nm{padding-left:16px}
.tog{border:0;background:none;padding:0;width:18px;height:22px;color:var(--ink-2);font-size:10px;flex-shrink:0}
.mk{width:18px;text-align:center;color:var(--ink);font-size:11px;flex-shrink:0}
.mk.late{color:var(--late)}
.cell{min-width:0;width:100%;border:1px solid transparent;background:transparent;border-radius:5px;padding:2px 5px;height:26px}
.cell:hover{border-color:var(--line)}
.cell:focus{border-color:var(--accent);outline:none;background:var(--panel)}
.row.group .cell.name{font-weight:600}
.cell.who{font-size:12px;color:var(--ink-2)}
.num{text-align:right;padding-right:8px;font-variant-numeric:tabular-nums;color:var(--ink-2);font-size:12px;white-space:nowrap}
.num.late{color:var(--late);font-weight:600}

/* svg parts (colors come from the theme variables) */
.off{fill:var(--off)}
.rowline{stroke:var(--line);stroke-width:1}
.row-sel{fill:var(--sel)}
.h-band{fill:var(--panel)}
.h-sep{stroke:var(--line);stroke-width:1}
.h-top{fill:var(--ink-2);font-size:11px;font-weight:600}
.h-bot{fill:var(--ink-2);font-size:11px}
.h-bot.offday{fill:var(--ink-3)}
.h-today-mark{fill:var(--accent)}
.today{fill:var(--accent);fill-opacity:.85}
.h-today-bg{fill:var(--accent)}
.h-bot.is-today{fill:var(--accent-ink);font-weight:600}
.bar-track{fill:var(--accent);fill-opacity:.18}
.bar-fill{fill:var(--accent)}
.bar.done .bar-track{fill-opacity:.38}
.bar.late .bar-track{fill:var(--late);fill-opacity:.22}
.bar.late .bar-fill{fill:var(--late)}
.bar.sel .bar-track{stroke:var(--ink);stroke-width:1.2;stroke-opacity:.55}
.gbar{fill:var(--ink);fill-opacity:.78}
.gbar.late{fill:var(--late);fill-opacity:1}
.ms{fill:var(--ink);stroke:var(--panel);stroke-width:1.2}
.ms.late{fill:var(--late)}
.ms.done{fill-opacity:.38}
.ms.sel{stroke:var(--accent);stroke-width:2}
.blabel{fill:var(--ink-3);font-size:11px}
.blabel.late{fill:var(--late)}
.hit{fill:transparent;cursor:grab;touch-action:none}
.hit.edge{cursor:ew-resize}
.dragging .hit{cursor:grabbing}
.drag-tip{fill:var(--ink);font-size:11px;font-weight:600}
.drag-tip-bg{fill:var(--panel);stroke:var(--line-strong)}

/* ---- empty state ---- */
.empty{position:absolute;inset:46px 0 0 0;display:flex;align-items:center;justify-content:center;pointer-events:none}
.empty[hidden]{display:none}
.empty-box{pointer-events:auto;background:var(--panel);border:1px dashed var(--line-strong);border-radius:14px;padding:22px 28px;text-align:center;max-width:min(520px,90%)}
.empty-title{margin:0 0 6px;font-weight:600;font-size:16px}
.empty-sub{margin:0 0 14px;color:var(--ink-2);font-size:13px}
.empty-actions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}

/* ---- detail panel ---- */
.detail{position:relative;z-index:6;width:300px;flex-shrink:0;overflow:auto;background:var(--panel);border-left:1px solid var(--line-strong);padding:12px 14px;flex-direction:column;gap:8px;font-size:12px}
.detail[hidden]{display:none}
.detail:not([hidden]){display:flex}
.d-head{display:flex;align-items:center;justify-content:space-between}
.d-kind{font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.05em}
.fld{display:flex;flex-direction:column;gap:3px;color:var(--ink-3);flex:1;min-width:0}
.fld input[type="text"],.fld input[type="date"],.fld input[type="number"],.fld textarea{background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:4px 7px;color:var(--ink);font-size:13px;width:100%}
.fld textarea{resize:vertical;min-height:54px}
.fld input[type="range"]{accent-color:var(--accent);width:100%}
.fld output{color:var(--ink);font-weight:600;margin-left:6px}
#d-prog-wrap{display:grid;grid-template-columns:auto 1fr;align-items:center}
#d-prog-wrap input{grid-column:1 / -1}
#d-prog-wrap[hidden]{display:none}
.fld-row{display:flex;gap:8px;align-items:flex-end}
.fld-row[hidden],.fld[hidden],.chk[hidden],.d-actions button[hidden]{display:none}
.chk{display:flex;align-items:center;gap:6px;color:var(--ink-2);font-size:13px}
.chk input{accent-color:var(--accent);width:16px;height:16px}
.d-cal{margin:0 0 6px;flex:1;color:var(--ink-3)}
.d-state{margin:0;color:var(--ink-2)}
.d-state.late{color:var(--late);font-weight:600}
.d-actions{display:flex;flex-wrap:wrap;gap:6px;padding-top:4px;border-top:1px solid var(--line)}
.d-actions button{font-size:12px;padding:3px 9px}
.d-actions .danger{margin-left:auto}

/* ---- tips / legend ---- */
.tips{margin:0;padding:8px 16px;font-size:12px;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:4px 18px}
.legend{display:inline-flex;align-items:center;gap:6px;flex-wrap:wrap}
.lg{display:inline-block;width:18px;height:8px;border-radius:2px;margin-left:6px}
.lg-run{background:var(--accent)}
.lg-done{background:color-mix(in srgb,var(--accent) 38%,transparent)}
.lg-late{background:var(--late)}
.lg-today{width:2px;height:12px;background:var(--accent);border-radius:0}
.lg-ms{color:var(--ink);margin-left:6px}

.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom));transform:translateX(-50%);max-width:min(720px,92vw);background:var(--ink);color:var(--bg);padding:9px 16px;border-radius:10px;font-size:13px;box-shadow:0 4px 18px #0004;z-index:20}
.toast[hidden]{display:none}
.toast[data-kind="error"]{background:#8E3A3E;color:#fff}

/* ---- Tsuzura footer (shared) ---- */
.tz-foot{display:flex;justify-content:center;padding:22px 16px calc(28px + env(safe-area-inset-bottom))}
.tz-link{display:inline-flex;align-items:center;gap:10px;padding:8px 18px 8px 10px;border:1px solid var(--line);border-radius:999px;background:var(--panel);color:var(--ink-2);text-decoration:none;font-size:12px;line-height:1.4;--tz-gap:var(--panel);transition:border-color .15s,color .15s}
.tz-link:hover{border-color:var(--line-strong);color:var(--ink)}
.tz-mark{width:24px;height:24px;color:#8E5532;flex-shrink:0}
.tz-name{font-size:14px;font-weight:500;letter-spacing:.12em;color:var(--ink)}
.tz-sub{color:var(--ink-3)}
:root[data-theme="dark"] .tz-mark{color:#C9A063}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tz-mark{color:#C9A063}}

@media (max-width:760px){
  :root{--left:168px}
  .brand-sub,.privacy{display:none}
  .hdr{gap:10px;padding:8px 12px}
  .title-input{flex:1 1 auto}
  .toolbar{padding:8px 12px;gap:6px 10px}
  .grp.files{margin-left:0}
  .files .lbl,.files .sep{display:none}
  .g-corner,.row{grid-template-columns:20px 1fr 44px}
  .c-who,.c-days,.cell.who,.num.days{display:none}
  .stage{min-height:420px}
  .detail{position:fixed;left:0;right:0;bottom:0;width:auto;max-height:70dvh;border-left:0;border-top:1px solid var(--line-strong);border-radius:14px 14px 0 0;box-shadow:0 -8px 28px rgba(15,18,32,.22);padding-bottom:calc(14px + env(safe-area-inset-bottom))}
}
@media print{.hdr,.toolbar,.tips,.tz-foot,.empty,.detail{display:none!important}}