:root{
  --bg:#fbfcfe; --surface:#ffffff; --surface-2:#f6f8fb; --surface-3:#eef2f8;
  --ink:#1a1f2e; --ink-2:#5a6478; --ink-3:#8a93a6;
  --line:#e7ebf1; --line-2:#eef1f6;
  --accent:#4f46e5; --accent-d:#4338ca; --accent-soft:#eef0fe;
  --crit:#e11d48; --crit-soft:#ffe4e9; --ok:#059669; --summary:#334155; --baseline:#c7cdd9;
  --sat:#eef4ff; --sun:#fff1f2;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06);
  --shadow:0 1px 3px rgba(16,24,40,.07),0 10px 28px rgba(16,24,40,.06);
  --shadow-lg:0 16px 48px rgba(16,24,40,.18);
  --radius:10px; --radius-sm:8px; --row:34px;
  --font:"Inter","Hiragino Kaku Gothic ProN","Noto Sans JP",-apple-system,BlinkMacSystemFont,sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);
  font-size:14px;line-height:1.55;-webkit-font-smoothing:antialiased;letter-spacing:-.005em}

/* ---- controls ---- */
button{font:inherit;cursor:pointer;border:1px solid transparent;border-radius:var(--radius-sm);
  padding:9px 15px;background:var(--accent);color:#fff;font-weight:600;letter-spacing:-.01em;
  box-shadow:var(--shadow-sm);transition:background .15s,box-shadow .15s,transform .05s}
button:hover{background:var(--accent-d)}
button:active{transform:translateY(.5px)}
button.ghost{background:#fff;color:var(--ink-2);border-color:var(--line);box-shadow:var(--shadow-sm)}
button.ghost:hover{background:var(--surface-2);color:var(--ink);border-color:#d7dde7}
button.sm{padding:5px 11px;font-size:12.5px;border-radius:7px}
button.danger{background:var(--crit)}button.danger:hover{background:#be123c}
input,select,textarea{font:inherit;padding:9px 11px;border:1px solid var(--line);border-radius:var(--radius-sm);
  width:100%;background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s}
input::placeholder{color:var(--ink-3)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
label{display:block;font-size:12px;color:var(--ink-2);font-weight:500;margin:20px 0 6px}
a{color:var(--accent);cursor:pointer;text-decoration:none}
a:hover{color:var(--accent-d)}
h1.page{font-size:21px;font-weight:700;margin:0;letter-spacing:-.02em}

/* ---- auth ---- */
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(120% 120% at 0% 0%,#6366f1 0%,#4f46e5 38%,#312e81 100%)}
.auth-card{background:#fff;border-radius:20px;box-shadow:var(--shadow-lg);padding:52px;width:100%;max-width:420px}
.brand{font-size:26px;font-weight:800;letter-spacing:-.03em}
.brand span{color:var(--accent)}
.tagline{color:var(--ink-3);font-size:13px;margin-top:2px}
.err{background:var(--crit-soft);color:#9f1239;padding:9px 12px;border-radius:var(--radius-sm);font-size:13px;margin-top:12px}
.switch{margin-top:16px;font-size:13px;color:var(--ink-3);text-align:center}
.switch a{font-weight:600}

/* ---- shell ---- */
.top{height:66px;background:rgba(255,255,255,.85);backdrop-filter:saturate(1.4) blur(8px);
  border-bottom:1px solid var(--line);display:flex;align-items:center;gap:20px;padding:0 44px;position:sticky;top:0;z-index:20}
.top .brand{font-size:19px}
.top .sp{flex:1}
.top .me{font-size:12.5px;color:var(--ink-2)}
.wrap{padding:48px 64px;max-width:1500px;margin:0 auto}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:32px;margin-bottom:24px}
.section-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}
.section-head strong{font-size:14px;font-weight:700}
.rowflex{display:flex;gap:18px;align-items:flex-start}
.muted{color:var(--ink-3)} .right{text-align:right}
.empty{color:var(--ink-3);padding:30px;text-align:center;font-size:13px}
.pill{display:inline-block;padding:2px 9px;border-radius:999px;font-size:11px;font-weight:600;background:var(--surface-3);color:var(--ink-2)}

/* project list */
.proj{display:flex;justify-content:space-between;align-items:center;padding:22px 28px;border:1px solid var(--line);
  border-radius:var(--radius-sm);margin-bottom:16px;cursor:pointer;background:#fff;transition:border-color .15s,box-shadow .15s,transform .08s}
.proj:hover{border-color:#c7cdf7;box-shadow:var(--shadow);transform:translateY(-1px)}
.proj .meta{font-size:12px;color:var(--ink-3);margin-top:2px}
.proj>span{color:var(--ink-3);font-size:20px}

/* ---- gantt ---- */
.legend{display:flex;gap:32px;font-size:12px;color:var(--ink-3);margin:28px 2px;flex-wrap:wrap;align-items:center}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;vertical-align:-1px;margin-right:5px}
.zoom{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff;margin-right:4px}
.zoom a{padding:6px 12px;font-size:12px;color:var(--ink-2);cursor:pointer;border-left:1px solid var(--line)}
.zoom a:first-child{border-left:none}
.zoom a.on{background:var(--accent);color:#fff}
.gantt{display:flex;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.g-left{flex-shrink:0;width:620px;border-right:1px solid var(--line);overflow:hidden}
.g-right{flex:1;overflow-x:auto}
.g-head{height:48px;display:flex;align-items:center;background:var(--surface-2);border-bottom:1px solid var(--line);
  font-size:11px;color:var(--ink-3);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.g-left .col{padding:0 8px;flex-shrink:0}
.c-wbs{width:54px}.c-name{width:170px}.c-dur{width:46px;text-align:right}.c-date{width:74px}.c-pct{width:52px;text-align:center}.c-act{width:132px}
.g-row{height:var(--row);display:flex;align-items:center;border-bottom:1px solid var(--line-2);font-size:13px}
.g-row:hover{background:var(--surface-2)}
.g-row .col{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.g-row .name.summary{font-weight:700}
.milestone-name::before{content:"◆ ";color:var(--accent)}
.caret{cursor:pointer;user-select:none;color:var(--ink-3);display:inline-block;width:13px;text-align:center;font-size:10px;flex-shrink:0}
.caret:hover{color:var(--ink)}
.critmark{color:var(--crit);font-size:9px;margin-right:2px;vertical-align:1px}
.lock{cursor:pointer;font-size:11px;margin-left:2px}
.rnin{padding:1px 6px;font-size:13px;width:150px;border-radius:6px}
.pctin{width:46px;padding:2px;font-size:12px;text-align:center;border-radius:6px}
.c-act a{cursor:pointer;margin-right:3px}

.time-head{height:48px;background:var(--surface-2)}
.month-row{display:flex;height:20px;border-bottom:1px solid var(--line)}
.month-cell{flex-shrink:0;border-left:1px solid var(--line-2);font-size:10px;font-weight:700;color:var(--ink-2);
  padding:3px 0 0 6px;white-space:nowrap;overflow:hidden;background:var(--surface-3)}
.day-row{display:flex;height:28px;border-bottom:1px solid var(--line)}
.daycell{flex-shrink:0;text-align:center;font-size:10px;color:var(--ink-3);border-left:1px solid var(--line-2);padding-top:3px;line-height:1.2}
.daycell .dow{display:block;font-size:9px}
.daycell.sat{background:var(--sat)} .daycell.sun{background:var(--sun)}
.tracks{position:relative}
.wkcol{position:absolute;top:0;bottom:0;z-index:0}
.wkcol.sat{background:var(--sat)} .wkcol.sun{background:var(--sun)}
.today{position:absolute;top:0;bottom:0;width:2px;background:var(--crit);opacity:.55;z-index:7}
.dep-svg{position:absolute;top:0;left:0;pointer-events:none;z-index:6}
.track{height:var(--row);position:relative;border-bottom:1px solid var(--line-2)}
.baseline{position:absolute;bottom:3px;height:5px;border-radius:3px;background:var(--baseline);z-index:0}
.bar{position:absolute;top:7px;height:18px;border-radius:6px;background:linear-gradient(180deg,#5b53e8,#4f46e5);
  display:flex;align-items:center;color:#fff;font-size:11px;padding:0 7px;overflow:hidden;cursor:grab;user-select:none;
  box-shadow:0 1px 2px rgba(79,70,229,.35);z-index:1}
.bar:hover{box-shadow:0 2px 8px rgba(79,70,229,.45)}
.bar:active{cursor:grabbing}
.bar.crit{background:linear-gradient(180deg,#f43f5e,#e11d48);box-shadow:0 1px 2px rgba(225,29,72,.35)}
.bar.summary{background:var(--summary);height:9px;top:12px;border-radius:3px;box-shadow:none}
.bar .pct{position:absolute;left:0;top:0;bottom:0;background:rgba(255,255,255,.28);border-radius:6px 0 0 6px}
.diamond{position:absolute;top:8px;width:16px;height:16px;background:var(--accent);transform:rotate(45deg);cursor:grab;box-shadow:0 1px 3px rgba(79,70,229,.4)}
.diamond.crit{background:var(--crit)}
.rh{position:absolute;right:0;top:0;bottom:0;width:8px;cursor:ew-resize;z-index:2}
.lh{position:absolute;right:-7px;top:50%;transform:translateY(-50%);width:11px;height:11px;border-radius:50%;
  background:var(--accent);border:2px solid #fff;box-shadow:0 1px 3px rgba(0,0,0,.25);cursor:crosshair;opacity:0;z-index:3;transition:opacity .12s}
.bar:hover .lh{opacity:1}

/* table */
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line-2)}
th{color:var(--ink-3);font-weight:600;font-size:11px;text-transform:uppercase;letter-spacing:.04em}

/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(16,24,40,.4);backdrop-filter:blur(3px);display:grid;place-items:center;z-index:50;animation:fade .15s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{background:#fff;border-radius:16px;padding:38px;width:100%;max-width:480px;box-shadow:var(--shadow-lg);animation:pop .16s ease}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}
.modal h2{margin:0 0 14px;font-size:17px;font-weight:700;letter-spacing:-.01em}
.modal .actions{display:flex;gap:12px;justify-content:flex-end;margin-top:30px}

/* feedback */
.loadingbar{position:fixed;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),#22d3ee);z-index:300;animation:lb 1s ease-in-out infinite}
@keyframes lb{0%{opacity:.45}50%{opacity:1}100%{opacity:.45}}
.loadbar{height:9px;background:var(--surface-3);border-radius:5px;overflow:hidden;margin-top:4px}
.loadfill{height:100%;background:var(--accent);border-radius:5px}.loadfill.over{background:var(--crit)}
.toasts{position:fixed;right:20px;bottom:20px;display:flex;flex-direction:column;gap:9px;z-index:200}
.toast{background:var(--ink);color:#fff;padding:11px 17px;border-radius:10px;font-size:13px;box-shadow:var(--shadow-lg);min-width:190px;animation:tin .22s ease}
.toast.ok{background:var(--ok)}.toast.err{background:var(--crit)}
@keyframes tin{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.tip{position:fixed;z-index:210;background:var(--ink);color:#fff;font-size:12px;line-height:1.5;padding:8px 11px;border-radius:9px;box-shadow:var(--shadow-lg);pointer-events:none;max-width:280px}
.tip strong{font-size:13px}

:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* footer */
.appfoot{display:flex;flex-direction:column;align-items:center;gap:3px;padding:30px 20px 38px;
  border-top:1px solid var(--line);color:var(--ink-3);font-size:12px;background:var(--bg);letter-spacing:.01em}
.appfoot .ff-brand{font-weight:600;color:var(--ink-2);font-size:12.5px}
.auth-copy{text-align:center;color:var(--ink-3);font-size:11.5px;margin-top:20px}

/* login: company site link */
.auth-site{font-weight:600;color:var(--accent);font-size:12.5px}
.auth-site:hover{color:var(--accent-d);text-decoration:underline}