:root{--bg:#f5f7fa;--surface:#fff;--line:#d8e0e8;--text:#25313c;--muted:#62707c;--accent:#2d6cdf}
*{box-sizing:border-box} html,body{margin:0;padding:0;min-height:100%}
body{background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:1.45}
.app-shell{min-height:100vh;display:grid;grid-template-columns:240px minmax(0,1fr)}
.app-sidebar{background:var(--surface);border-right:1px solid var(--line);padding:20px 16px;position:sticky;top:0;align-self:start;min-height:100vh}
.brand{font-size:22px;font-weight:700;margin-bottom:18px}
.app-nav{display:flex;flex-direction:column;gap:6px}
.app-nav a{text-decoration:none;color:var(--text);padding:10px 12px;border-radius:10px}
.app-nav a:hover{background:#eef4fb}
.app-main{min-width:0;display:flex;flex-direction:column;padding:20px 24px;gap:16px}
.app-topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.page-title{margin:0;font-size:24px;font-weight:700}
.page-subtitle{margin-top:4px;color:var(--muted);font-size:13px}
.flash{border:1px solid #cfe0ff;background:#f1f7ff;color:#24497a;padding:10px 12px;border-radius:10px}
.flash-error{border-color:#f0c9c2;background:#fff3f1;color:#8a3a2b}
.flash-success{border-color:#cfe8d5;background:#f2faf5;color:#24553a}
.page-content{display:grid;gap:18px;align-content:start}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px;width:100%}
.section-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
h1,h2,h3{margin:0 0 10px} h2{font-size:18px;font-weight:700}
.btn,button{appearance:none;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:10px;padding:9px 14px;cursor:pointer;text-decoration:none;font-size:14px}
button:hover,.btn:hover{border-color:var(--accent)}
.buttons{display:flex;gap:10px;flex-wrap:wrap}
table{width:100%;border-collapse:collapse;table-layout:auto}
th,td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-size:12px;font-weight:700}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(240px,1fr));gap:14px}
.form-grid label{display:flex;flex-direction:column;gap:6px}
.full{grid-column:1/-1}
input,select,textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px;background:var(--surface)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px}
.stats div{border:1px solid var(--line);border-radius:12px;background:#fafbfd;padding:14px}
.stats strong{display:block;font-size:22px;font-weight:700;margin-bottom:4px}
.notice{border:1px solid #cfe0ff;background:#f1f7ff;color:#24497a;padding:10px 12px;border-radius:10px}
.notice-error{border-color:#f0c9c2;background:#fff3f1;color:#8a3a2b}
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px}
.login-card{width:min(440px,100%);background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px}
.sortable-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.sortable-item{padding:12px 14px;border:1px solid var(--line);background:#fff;border-radius:12px;cursor:grab;display:flex;justify-content:space-between;align-items:center}
.sort-handle{color:var(--muted);font-size:12px}
.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:#eef4fb;color:#315781;font-size:12px}
@media (max-width:980px){.app-shell{grid-template-columns:1fr}.app-sidebar{position:static;min-height:auto;border-right:none;border-bottom:1px solid var(--line)}.app-main{padding:16px}.form-grid{grid-template-columns:1fr}}