:root{
  --navy:#0d1b2e;--ink:#1d2b3f;--cyan:#19b8d4;--cyan-deep:#0e8aa3;--amber:#f5a524;
  --paper:#f7fafc;--white:#fff;--line:#dbe4ee;--muted:#5a6b80;--danger:#c0392b;
  --font-jp:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN",sans-serif;
  --font-en:"Outfit","Noto Sans JP",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font-jp);color:var(--ink);background:var(--paper);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--cyan-deep)}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:4px}
[hidden]{display:none!important}

.top{background:var(--navy);color:var(--white);display:flex;align-items:center;gap:12px;padding:0 20px;height:56px}
.brand{font-family:var(--font-en);font-weight:800;font-size:1.3rem;color:var(--white);text-decoration:none}
.brand span{color:var(--cyan)}
.badge{font-family:var(--font-en);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;background:var(--amber);color:var(--navy);padding:2px 10px;border-radius:99px;font-weight:700}
.top__right{margin-left:auto;font-size:.82rem}
.top__right a{color:#cfe0f0}

.notice{background:#fff6e0;border-bottom:1px solid #f0d9a0;color:#6b4a00;font-size:.82rem;padding:8px 20px}

.app{flex:1;display:grid;grid-template-columns:minmax(280px,380px) 1fr;min-height:0}
.pane{padding:16px 20px;min-width:0}
.pane--tree{background:var(--white);border-right:1px solid var(--line);overflow:auto;max-height:calc(100vh - 56px - 38px)}
.pane--form{max-width:720px}

.toolbar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.hint{font-size:.74rem;color:var(--muted);margin-bottom:10px}
.btn{font:inherit;font-size:.84rem;font-weight:500;border:1px solid var(--line);background:var(--white);color:var(--ink);padding:.45em .9em;border-radius:8px;cursor:pointer}
.btn:hover{border-color:var(--cyan)}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:var(--navy);font-weight:700}
.btn--primary:hover{background:#3fd0e9}
.btn--danger{color:var(--danger);border-color:#e6b9b3}
.btn--danger:hover{background:#fdeceb;border-color:var(--danger)}
.btn--ghost{color:var(--muted)}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* tree */
.tree ul{list-style:none;margin:0;padding:0}
.tree ul ul{margin-left:18px;border-left:1px dashed var(--line)}
.node{display:flex;align-items:center;gap:2px;border-radius:8px;border:2px solid transparent}
.node .tog{flex:none;width:24px;height:28px;border:0;background:none;color:var(--muted);cursor:pointer;font-size:.7rem}
.node .tog.leaf{visibility:hidden}
.node .lbl{flex:1;min-width:0;text-align:left;font:inherit;font-size:.9rem;border:0;background:none;color:var(--ink);padding:5px 6px;cursor:pointer;border-radius:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.node .ico{margin-right:4px}
.node:hover{background:#eef6fa}
.node.sel{background:#d9f3f9}
.node.sel .lbl{font-weight:700}
.node.dragging{opacity:.4}
.node.drop-ok{border-color:var(--cyan);background:#d9f3f9}
.node.drop-ng{border-color:var(--danger)}
.loading{color:var(--muted);font-size:.9rem}

/* form */
.form__title{font-size:1.15rem;margin-bottom:2px}
.form__path{font-size:.78rem;color:var(--muted);margin-bottom:14px;min-height:1.2em}
.field{margin-bottom:12px}
.field label{display:block;font-size:.8rem;font-weight:700;margin-bottom:3px}
.field label em{font-style:normal;font-size:.68rem;background:var(--danger);color:#fff;padding:1px 6px;border-radius:4px;margin-left:6px}
.row{display:flex;gap:8px;align-items:center}
.field input,.field select{flex:1;width:100%;min-width:0;font:inherit;font-size:1rem;padding:.55em .7em;border:1px solid var(--line);border-radius:8px;background:var(--white);color:var(--ink)}
.field input:focus,.field select:focus{border-color:var(--cyan)}
.open{flex:none;font-size:.78rem;font-weight:700;text-decoration:none;border:1px solid var(--cyan);color:var(--cyan-deep);padding:.4em .8em;border-radius:8px;white-space:nowrap}
.open:hover{background:#e6f8fb}
.actions{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap}
.actions .btn{padding:.6em 1.4em;font-size:.95rem}
.actions .btn--danger{margin-left:auto}

.toast{position:fixed;left:50%;bottom:20px;transform:translate(-50%,20px);background:var(--navy);color:#fff;padding:.7em 1.2em;border-radius:10px;font-size:.88rem;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:90vw;z-index:50}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.err{background:var(--danger)}

@media (max-width:820px){
  .app{grid-template-columns:1fr}
  .pane--tree{max-height:46vh;border-right:0;border-bottom:1px solid var(--line)}
  .top{padding:0 12px}
  .notice{padding:8px 12px}
}
@media (prefers-reduced-motion:reduce){*{transition-duration:.01ms!important}}