/* Kana Practice Admin UI — uses tokens from app.css */
body.admin-body{background:radial-gradient(circle at 0 0,rgba(244,91,16,.16),transparent 31%),radial-gradient(circle at 100% 10%,rgba(55,125,255,.12),transparent 33%),linear-gradient(135deg,#fffaf4,#fbf5ec)}
.admin-shell{width:min(1180px,100%);margin:0 auto;padding:18px 16px calc(110px + var(--safe))}

/* Header */
.admin-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:14px}
.admin-brand{display:flex;align-items:center;gap:12px;text-decoration:none;min-width:0}
.admin-brand>span:last-child{min-width:0}.admin-brand strong{display:block;font-size:22px;letter-spacing:-.05em;color:var(--orange)}
.admin-brand small{display:block;color:var(--muted);font-size:12px;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.admin-actions{display:flex;gap:8px;align-items:center}
.admin-pill,.admin-back{min-height:42px;border-radius:999px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow2);display:inline-flex;align-items:center;gap:8px;padding:0 14px;text-decoration:none;font-weight:900;color:var(--text);white-space:nowrap}
.admin-pill{color:#a55400;background:#fff1d8;border-color:#ffe1a9}

/* Tabs */
.admin-tabs{position:sticky;top:8px;z-index:20;display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:10px 0 12px;padding:7px;border:1px solid rgba(238,229,220,.95);border-radius:22px;background:rgba(255,253,250,.88);backdrop-filter:blur(18px);box-shadow:var(--shadow2)}
.admin-tabs a{min-height:48px;border-radius:16px;text-decoration:none;display:flex;align-items:center;justify-content:center;gap:7px;color:var(--muted);font-weight:900;font-size:13px;transition:background .18s ease,color .18s ease,transform .18s ease}
.admin-tabs a.active{background:linear-gradient(135deg,var(--orange2),var(--orange));color:#fff;box-shadow:0 10px 20px rgba(244,91,16,.18)}
.admin-tabs a:not(.active):hover{background:var(--orangeSoft);color:var(--orange)}

/* Page intro */
.admin-page-intro{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:14px;border:1px solid var(--line);border-radius:24px;background:rgba(255,255,255,.90);box-shadow:var(--shadow2);padding:17px 18px;margin-bottom:12px}
.admin-page-intro:after{content:"管";position:absolute;right:20px;bottom:-44px;color:rgba(244,91,16,.055);font:900 110px/1 "Hiragino Sans","Yu Gothic",sans-serif;pointer-events:none}
.admin-page-intro>div{position:relative;z-index:1}.admin-page-intro small{display:inline-flex;align-items:center;gap:6px;color:var(--orange);font-weight:900;font-size:10px;text-transform:uppercase;letter-spacing:.08em}
.admin-page-intro small:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(244,91,16,.12)}
.admin-page-intro h1{margin:5px 0 3px;font-size:24px;letter-spacing:-.05em}.admin-page-intro p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.admin-page-intro .admin-help{position:relative;z-index:1;min-width:42px;height:42px;border-radius:15px;border:1px solid var(--line);background:#fff;color:var(--orange);display:grid;place-items:center;font-weight:900;box-shadow:var(--shadow2);cursor:pointer}

/* Alerts */
.admin-alert{position:relative;padding:13px 48px 13px 15px;border-radius:18px;margin-bottom:12px;font-weight:800;border:1px solid;box-shadow:var(--shadow2)}
.admin-alert.success{background:var(--greenSoft);border-color:#bbf7d0;color:#166534}.admin-alert.error{background:var(--redSoft);border-color:#fecaca;color:#991b1b}
.alert-close{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:32px;height:32px;border:0;border-radius:10px;background:rgba(255,255,255,.55);color:inherit;font-size:18px;cursor:pointer}

/* Stats */
.admin-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:12px}
.admin-stat{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:22px;background:rgba(255,255,255,.92);box-shadow:var(--shadow2);padding:15px;min-height:116px;display:grid;grid-template-columns:1fr auto;grid-template-areas:"label icon" "value icon" "meta meta";align-content:space-between;transition:transform .18s ease,box-shadow .18s ease}
.admin-stat:after{content:"";position:absolute;right:-24px;bottom:-34px;width:92px;height:92px;border-radius:50%;background:var(--orangeSoft);opacity:.7}
.admin-stat>span{grid-area:icon;position:relative;z-index:1;width:44px;height:44px;border-radius:15px;background:var(--orangeSoft);color:var(--orange);display:grid;place-items:center;font-size:22px}
.admin-stat small{grid-area:label;color:var(--muted);font-weight:800;font-size:11px}.admin-stat b{grid-area:value;font-size:30px;letter-spacing:-.055em;line-height:1.05}.admin-stat em{grid-area:meta;font-style:normal;color:var(--muted);font-size:11px;margin-top:9px}

/* Cards */
.admin-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:12px}.admin-card{border:1px solid var(--line);border-radius:24px;background:rgba(255,255,255,.92);box-shadow:var(--shadow2);padding:16px;margin-bottom:12px}
.admin-card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.admin-card-head h2{margin:0;font-size:18px;letter-spacing:-.04em}.admin-card-head>span,.muted{color:var(--muted)}
.admin-card-head>span{font-size:12px;font-weight:800;padding:6px 9px;border-radius:999px;background:#faf7f3}

/* Tables */
.admin-table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff;scrollbar-color:#e5d8cb transparent;scrollbar-width:thin}
.admin-table{width:100%;border-collapse:collapse;min-width:760px}.admin-table th,.admin-table td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;font-size:13px}.admin-table th{position:sticky;top:0;background:#fff7ef;z-index:1;color:#8a4b16;font-weight:900;font-size:11px;text-transform:uppercase;letter-spacing:.04em}.admin-table tbody tr{transition:background .15s ease}.admin-table tbody tr:hover{background:#fffcf8}.admin-table tr:last-child td{border-bottom:0}
.user-cell{display:flex;align-items:center;gap:10px}.user-pic{width:42px;height:42px;border-radius:999px;background:#5b3f3b;color:#fff;display:grid;place-items:center;overflow:hidden;flex:0 0 auto;font-weight:900}.user-pic img{width:100%;height:100%;object-fit:cover}
.badge-mini{display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:5px 9px;font-size:10px;font-weight:900;background:#faf7f3;color:var(--muted);white-space:nowrap}.badge-mini.orange{background:var(--orangeSoft);color:var(--orange)}.badge-mini.green{background:var(--greenSoft);color:#15803d}.badge-mini.red{background:var(--redSoft);color:#b91c1c}.badge-mini.blue{background:var(--blueSoft);color:#2563eb}.badge-mini.purple{background:var(--purpleSoft);color:#6d28d9}

/* Forms and buttons */
.admin-filter{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:8px}.admin-filter.users{grid-template-columns:1fr auto}
.admin-input,.admin-select,.admin-textarea{width:100%;min-height:46px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:0 12px;font:inherit;outline:none;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}.admin-textarea{padding:12px;min-height:92px;resize:vertical;line-height:1.5}
.admin-input:focus,.admin-select:focus,.admin-textarea:focus{border-color:#ffb68d;box-shadow:0 0 0 4px rgba(244,91,16,.08)}
.admin-btn{min-height:46px;border:0;border-radius:14px;background:linear-gradient(135deg,var(--orange2),var(--orange));color:#fff;font:inherit;font-weight:900;padding:0 16px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px;box-shadow:0 10px 20px rgba(244,91,16,.14);transition:transform .18s ease,box-shadow .18s ease}
.admin-btn.ghost{background:#fff;color:var(--text);border:1px solid var(--line);box-shadow:none}.admin-btn.danger{background:linear-gradient(135deg,#fb7185,#ef4444)}.admin-btn.small{min-height:34px;border-radius:11px;padding:0 10px;font-size:11px;box-shadow:none}
.admin-actions-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.admin-actions-row form{display:inline}.admin-actions-row button,.admin-actions-row a{min-height:32px;border-radius:10px;border:1px solid var(--line);background:#fff;padding:0 9px;font-size:11px;font-weight:900;text-decoration:none;color:var(--text);display:inline-flex;align-items:center;cursor:pointer}.admin-actions-row .danger{background:var(--redSoft);border-color:#fecaca;color:#b91c1c}.admin-actions-row .orange{background:var(--orangeSoft);border-color:#ffd1ba;color:var(--orange)}.admin-actions-row .green{background:var(--greenSoft);border-color:#bbf7d0;color:#15803d}
.admin-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.admin-form-grid .full{grid-column:1/-1}.admin-form-grid label{font-size:11px;font-weight:900;color:#3a2f29}.admin-form-grid label span{display:block;margin-bottom:6px}.admin-form-grid .check{display:flex;align-items:center;gap:8px;min-height:46px;padding:0 4px}.admin-form-grid .check input{width:auto;min-height:auto;accent-color:var(--orange)}

/* Details and bulk controls */
.details-box{border:1px solid var(--line);border-radius:16px;background:#fff;margin-top:8px}.details-box summary{cursor:pointer;padding:11px 12px;font-weight:900;color:var(--orange);font-size:11px;list-style:none}.details-box summary::-webkit-details-marker{display:none}.details-box summary:after{content:"＋";float:right}.details-box[open] summary:after{content:"−"}.details-box>div{padding:0 12px 12px}
.mini-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.mini-grid div{border-radius:14px;background:#faf7f3;padding:10px;text-align:center}.mini-grid small{display:block;color:var(--muted);font-size:9px}.mini-grid b{font-size:18px}
.bulk-bar{position:sticky;top:78px;z-index:8;display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:10px 0;padding:8px;border:1px solid var(--line);border-radius:16px;background:rgba(255,253,250,.94);backdrop-filter:blur(12px)}.bulk-bar .admin-select{width:auto;min-width:180px}.bulk-bar .admin-input{width:220px}.selection-count{margin-left:auto;padding:6px 9px;border-radius:999px;background:var(--orangeSoft);color:var(--orange);font-size:10px;font-weight:900}
.vocab-title{font-weight:900;font-size:16px}.vocab-title ruby{ruby-align:center}.line-clamp{max-width:320px;white-space:normal;color:var(--muted);line-height:1.45}

/* Empty states, lists, tools */
.empty-admin{min-height:200px;display:grid;place-items:center;text-align:center;color:var(--muted);border:1px dashed #dfd1c5;border-radius:20px;background:#fff;padding:24px}.empty-admin:before{content:"⌁";display:block;font-size:32px;color:#c9b7a7;margin-bottom:6px}
.category-list{display:grid;gap:8px}.category-row{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;padding:10px 0;border-bottom:1px solid var(--line)}.category-row:last-child{border-bottom:0}.progress-thin{height:7px;border-radius:999px;background:#f0e8df;overflow:hidden;margin-top:7px}.progress-thin i{display:block;height:100%;background:linear-gradient(90deg,var(--orange2),var(--orange));border-radius:inherit}
.tools-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.tool-card{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:20px;background:#fff;padding:16px;text-decoration:none;display:grid;gap:8px;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.tool-card:after{content:"›";position:absolute;right:12px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--orangeSoft);color:var(--orange);display:grid;place-items:center;font-size:20px}.tool-card b{font-size:15px;padding-right:30px}.tool-card small{color:var(--muted);line-height:1.5;font-size:12px}.danger-zone{border-color:#fecaca;background:#fff9f9}

/* Pagination */
.pagination{display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap;margin-top:12px}.pagination a,.pagination span{min-width:38px;height:38px;border-radius:12px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;text-decoration:none;font-weight:900;color:var(--text)}.pagination span.active{background:var(--orange);color:#fff;border-color:var(--orange)}.pagination span.disabled{opacity:.45}

/* Dialog */
.admin-dialog{width:min(430px,calc(100% - 28px));border:0;border-radius:24px;padding:0;background:transparent}.admin-dialog::backdrop{background:rgba(23,25,37,.38);backdrop-filter:blur(3px)}.admin-dialog-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:0 30px 70px rgba(23,25,37,.22)}.admin-dialog-icon{width:50px;height:50px;border-radius:17px;background:var(--redSoft);color:var(--red);display:grid;place-items:center;font-size:24px;margin-bottom:13px}.admin-dialog h2{margin:0 0 6px;font-size:20px;letter-spacing:-.04em}.admin-dialog p{margin:0;color:var(--muted);line-height:1.55}.admin-dialog-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:17px}.admin-dialog-actions button{min-height:46px;border:0;border-radius:14px;font-weight:900;cursor:pointer}.admin-dialog-cancel{background:#fff;border:1px solid var(--line)!important;color:var(--text)}.admin-dialog-confirm{background:var(--red);color:#fff}

/* Small help tooltip */
.admin-shortcuts{position:fixed;z-index:50;right:18px;bottom:94px;width:min(320px,calc(100% - 36px));border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow);padding:14px}.admin-shortcuts h3{margin:0 0 8px;font-size:15px}.admin-shortcuts p{margin:0;color:var(--muted);font-size:12px;line-height:1.55}.admin-shortcuts kbd{padding:2px 6px;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;background:#faf7f3;font:700 11px Inter,sans-serif}

@media(hover:hover){.admin-stat:hover,.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.tool-card:hover{border-color:#ffd1ba}.admin-btn:hover{transform:translateY(-1px)}}
@media(max-width:900px){.admin-layout{grid-template-columns:1fr}.admin-grid{grid-template-columns:repeat(2,1fr)}.admin-filter{grid-template-columns:1fr}.admin-filter.users{grid-template-columns:1fr}.tools-grid{grid-template-columns:1fr}}
@media(max-width:640px){
  .admin-shell{padding:12px 12px calc(96px + var(--safe))}.admin-top{align-items:center}.admin-brand strong{font-size:19px}.admin-brand small{max-width:190px}.admin-actions{gap:5px}.admin-pill{display:none}.admin-back{min-height:40px;padding:0 11px;font-size:11px}
  .admin-tabs{position:static;display:flex;overflow-x:auto;scrollbar-width:none;padding:6px;border-radius:20px}.admin-tabs::-webkit-scrollbar{display:none}.admin-tabs a{flex:0 0 auto;min-width:104px;min-height:44px;font-size:11px}
  .admin-page-intro{padding:15px;border-radius:21px}.admin-page-intro h1{font-size:21px}.admin-page-intro p{font-size:12px}.admin-page-intro:after{font-size:90px}
  .admin-grid{grid-template-columns:1fr 1fr}.admin-stat{min-height:106px;padding:12px}.admin-stat b{font-size:25px}.admin-stat>span{width:38px;height:38px;border-radius:13px;font-size:19px}.admin-stat em{font-size:9px}
  .admin-card{padding:13px;border-radius:21px}.admin-card-head{align-items:flex-start}.admin-card-head h2{font-size:16px}
  .admin-form-grid{grid-template-columns:1fr}.mini-grid{grid-template-columns:repeat(2,1fr)}.bulk-bar{position:static}.bulk-bar .admin-select,.bulk-bar .admin-input{width:100%;min-width:0}.selection-count{margin-left:0;width:100%;text-align:center}
  /* Tables become readable cards */
  .admin-table-wrap{overflow:visible;border:0;background:transparent}.admin-table{min-width:0;display:block}.admin-table thead{display:none}.admin-table tbody{display:grid;gap:9px}.admin-table tr{display:block;border:1px solid var(--line);border-radius:17px;background:#fff;padding:9px;box-shadow:0 5px 14px rgba(48,32,18,.04)}.admin-table td{display:grid;grid-template-columns:96px minmax(0,1fr);gap:10px;align-items:start;border:0;padding:7px 5px;font-size:12px}.admin-table td:before{content:attr(data-label);color:var(--muted);font-size:9px;font-weight:900;text-transform:uppercase;letter-spacing:.04em;padding-top:3px}.admin-table td:empty{display:none}.admin-table td:first-child .user-cell{grid-column:1/-1}.admin-actions-row{justify-content:flex-start}.line-clamp{max-width:none}
  .admin-dialog-actions{grid-template-columns:1fr}.admin-shortcuts{bottom:88px}
}
@media(max-width:390px){.admin-grid{grid-template-columns:1fr}.admin-brand small{max-width:150px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}