:root{
  --bg:#f7f8fa;
  --panel:#ffffff;
  --line:#e5e7eb;
  --text:#111827;
  --muted:#6b7280;
  --brand:#2563eb;
  --brand-weak:#e8eefc;
  --accent:#10b981;
  --warn:#f59e0b;
  --shadow:0 8px 24px rgba(17,24,39,.06);
  --radius:14px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family: system-ui,-apple-system,"Segoe UI",Roboto,"Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
  -webkit-font-smoothing:antialiased; line-height:1.5;
}
a{color:inherit; text-decoration:none}
button{font:inherit; cursor:pointer}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 16px;
  border-radius:12px;
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .1s ease;
}
.btn:focus-visible{
  outline:3px solid rgba(37,99,235,.8);
  outline-offset:2px;
  box-shadow:0 0 0 2px rgba(191,219,254,.75);
}
.btn:disabled{
  opacity:.55;
  cursor:not-allowed;
  box-shadow:none;
}
.btn-primary{
  background:linear-gradient(180deg,#2563eb,#1d4ed8);
  color:#fff;
  border:none;
}
.btn-primary:hover{ filter:brightness(.97); }
.btn-secondary{
  background:#4b5563;
  color:#fff;
  border:1px solid #374151;
}
.btn-secondary:hover{ background:#374151; }
.btn-outline{
  background:#fff;
  color:#1f2937;
  border:1px solid #1f2937;
}
.btn-outline:hover{ background:#f3f4f6; }
.btn-outline-bold{
  background:#fff;
  color:#0b1120;
  border:2px solid #0b1120;
  font-weight:700;
}
.btn-outline-bold:hover{ background:#f9fafb; }
.btn-ghost{
  background:#fff;
  color:#1f2937;
  border:1px solid transparent;
}
.btn-ghost:hover{
  background:#eef2ff;
  border-color:#c7d2fe;
}
.btn-ghost.is-current{
  background:#1d4ed8;
  color:#fff;
  border-color:#1d4ed8;
}
.btn-ghost.is-current:hover{ filter:brightness(1); }
.btn-sm{ padding:0 14px; }
.with-icon span[aria-hidden="true"]{
  font-size:18px;
  line-height:1;
}

.btn--primary{
  background:linear-gradient(180deg,#2563eb,#1d4ed8);
  color:#fff;
  border:none;
}
.btn--primary:hover{ filter:brightness(.96); }
.btn--primary:disabled{ background:#93c5fd; color:#fff; }
.btn--secondary{
  background:#4b5563;
  color:#fff;
  border:1px solid #374151;
}
.btn--secondary:hover{ background:#374151; }
.btn--outline{
  background:#fff;
  color:#1f2937;
  border:1px solid #1f2937;
}
.btn--outline:hover{ background:#f3f4f6; }

.form-page{
  display:flex;
  flex-direction:column;
  gap:20px;
}
.form-grid{
  display:grid;
  gap:18px;
}
@media (min-width: 960px){
  .form-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}
.form-section{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.form-section--full{
  grid-column:1 / -1;
}
.form-section--half{
  background:#fff;
  height:100%;
}
.form-section--half .field{
  flex:1 1 auto;
}
.form-section header{
  display:flex;
  flex-direction:column;
  gap:4px;
}
.form-section h2{
  margin:0;
  font-size:18px;
}
.form-section p.section-desc{
  margin:0;
  font-size:13px;
  color:var(--muted);
}
.field{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.field label{
  font-size:13px;
  color:#111827;
  font-weight:600;
}
.field .required-mark{
  color:#dc2626;
  margin-left:4px;
}
.field .form-input,
.field textarea,
.field select{
  width:100%;
}
.field textarea{
  min-height:auto;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:10px;
  font-size:14px;
  resize:vertical;
}
.form-input--textarea-auto{
  width:100%;
  min-height:0;
  padding:12px 14px;
  border:1px solid var(--line);
  border-radius:10px;
  font-size:14px;
  line-height:1.6;
  resize:vertical;
  background:#fff;
  color:var(--text);
  flex:1 1 auto;
}
.form-hint{
  font-size:12px;
  color:var(--muted);
}
.form-error{
  color:#dc2626;
  font-size:13px;
  margin:0;
}
.form-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:flex-end;
  margin-top:8px;
}
.repeatable-list{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.repeatable-item{
  border:1px dashed #cbd5e1;
  border-radius:12px;
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:12px;
  background:#f9fafb;
}
.repeatable-actions{
  display:flex;
  justify-content:flex-end;
}
.repeatable-actions .btn{
  min-height:36px;
}

.field-grid{
  display:grid;
  gap:18px;
}
.field-grid--two{
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
}
.field-grid--three{
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
}

/* Shell */
.app-shell{display:grid; grid-template-rows:auto 1fr auto; min-height:100vh}
.app-main{display:grid; grid-template-columns:1fr; min-height:0}

/* Header */
.app-header{
  position:sticky; top:0; z-index:1000;
  background:var(--panel); border-bottom:1px solid var(--line);
  display:flex; align-items:center; gap:12px; padding:10px 16px;
}
.icon-btn{
  display:inline-flex; align-items:center; justify-content:center;
  width:36px; height:36px; border-radius:10px; border:1px solid var(--line); background:#fff;
}
.icon-btn:hover{background:#fafafa}
.logo{display:flex; align-items:center; gap:10px; color:var(--text); font-weight:700}
.logo-mark{color:var(--brand)}
.logo-text{letter-spacing:.2px}
.header-spacer{flex:1}

.user-menu{position:relative}
.avatar-btn{display:flex; align-items:center; justify-content:center; width:40px; height:40px; border-radius:50%; border:1px solid var(--line); background:#fff}

.mobile-nav-btn{display:inline-flex; align-items:center; justify-content:center; width:36px; height:36px; border-radius:10px; border:1px solid var(--line); background:#fff}
.mobile-nav{position:absolute; left:16px; top:56px; min-width:220px; background:#fff; border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow); padding:8px; display:none; z-index:1001}
.mobile-nav.open{display:block}
.mobile-nav a{display:block; padding:10px 12px; border-radius:8px; color:#111}
.mobile-nav a:hover{background:#f5f7fb}
.menu{
  position:absolute; right:0; top:48px; min-width:180px;
  background:#fff; border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow); z-index:1002;
  padding:8px; display:none;
}
.menu.open{display:block}
.menu-item{display:block; padding:10px 12px; border-radius:8px}
.menu-item:hover{background:#f5f7fb}
.menu-divider{border:none; border-top:1px solid var(--line); margin:6px 0}

/* Sidebar */
.sidebar{
  background:var(--panel);
  border-right:1px solid var(--line);
  padding:14px 10px;
  overflow:auto;
  display:block;
}
.nav{display:flex; flex-direction:column; gap:6px}
.nav-item{
  display:flex; align-items:center; gap:10px;
  padding:10px 12px; border-radius:10px; color:#111;
}
.nav-item:hover{background:#f7f9ff}
.nav-item.active{background:var(--brand-weak); color:var(--brand); font-weight:600; border:1px solid #dbe6ff}
.nav-ico{
  width:16px; height:16px; border-radius:4px; background:linear-gradient(180deg,#cbd5e1,#94a3b8);
  flex-shrink:0;
}
.nav-label{white-space:nowrap; overflow:hidden; text-overflow:ellipsis}

/* Parent + children */
.has-children{display:flex; flex-direction:column; gap:6px}
.nav-parent{
  display:flex; align-items:center; justify-content:space-between;
  width:100%; padding:10px 12px; border-radius:10px; border:1px solid transparent; background:transparent;
}
.nav-parent:hover{background:#f7f9ff}
.has-children .nav-ico{margin-right:10px}
.nav-children{display:none; padding-left:28px}
.has-children.open .nav-children{display:flex; flex-direction:column; gap:6px}
.nav-child{padding:8px 10px; border-radius:8px; color:#374151}
.nav-child:hover{background:#f3f4f6}
.chev{margin-left:8px; transform:rotate(0); transition:transform .2s ease}
.has-children.open .chev{transform:rotate(180deg)}

/* Content */
.content{padding:24px; overflow:auto}
.page-header{display:flex; align-items:center; justify-content:space-between; margin-bottom:12px}
.page-header h1{margin:0; font-size:20px}

.cards{display:grid; grid-template-columns:1fr; gap:16px; margin-bottom:20px}
.card{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:16px; box-shadow:var(--shadow)
}
.card-title{font-size:14px; color:var(--muted); margin-bottom:6px}
.metric{font-size:24px; font-weight:700; margin-bottom:4px}
.muted{color:var(--muted); font-size:12px}

.panel{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:16px}
.panel-title{font-weight:700; margin-bottom:12px}

/* Forms (clean + minimal) */
.panel form label{ display:block; font-size:12px; color:var(--muted); margin:6px 0 6px; }
.panel form input[type="text"],
.panel form input[type="email"],
.panel form input[type="password"],
panel form input[type="date"],
panel form input[type="file"],
panel form select,
panel form textarea{
  width:100%; appearance:none; background:#fff; color:var(--text);
  border:1px solid var(--line); border-radius:10px; padding:10px 12px; font-size:14px; min-height:44px;
}
panel form textarea{ min-height:140px; resize:vertical }
panel form input:focus,
panel form select:focus,
panel form textarea:focus{
  outline:none; border-color:var(--brand); box-shadow:0 0 0 3px rgba(37,99,235,.12);
}
panel form button[type="submit"]{
  display:inline-block; background:var(--brand); color:#fff; border:none;
  padding:10px 16px; border-radius:10px; font-size:14px;
}
panel form button[type="submit"]:hover{ filter:brightness(0.98) }

.form-input{
  width:100%;
  min-height:44px;
  border:1px solid var(--line);
  border-radius:8px;
  padding:0 12px;
  font-size:14px;
  background:#fff;
  color:var(--text);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.form-input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(37,99,235,.15);
}

/* Responsive tables */
.table-wrap{overflow-x:auto; -webkit-overflow-scrolling:touch}
@media (max-width: 767px){
  .table.users-table thead{display:none}
  .table.users-table, .table.users-table tbody, .table.users-table tr, .table.users-table td{display:block; width:100%}
  .table.users-table tr{border-bottom:1px solid var(--line); margin-bottom:10px}
  .table.users-table td{border-bottom:none}
  .table.users-table td::before{content: attr(data-label); display:block; font-size:12px; color:var(--muted); margin-bottom:2px}
}

@media (max-width: 767px){
  .sidebar{display:none}
  .mobile-nav-btn{display:inline-flex}
}

@media (min-width: 768px){
  .mobile-nav-btn{display:none}
  .app-main{grid-template-columns:240px 1fr}
}

/* Buttons: create vs update */
.panel form .btn{
  display:inline-block; padding:10px 16px; border:none; border-radius:12px;
  color:#fff; font-size:14px; transition:filter .15s ease, transform .05s ease;
  box-shadow: 0 6px 18px rgba(17,24,39,.08);
}
.panel form .btn:hover{ filter:brightness(.98) }
.panel form .btn:active{ transform:translateY(1px) }
.panel form .btn-create{ background: linear-gradient(180deg, #3b82f6, #2563eb); border:1px solid rgba(0,0,0,.04) }
.panel form .btn-update{ background: linear-gradient(180deg, #10b981, #059669); border-radius:999px; letter-spacing:.2px; border:1つ@