:root{
  --bg:#f7f8fa; --card:#ffffff; --line:#e8e9ed; --line-strong:#d8dadf;
  --text:#1c1e21; --muted:#646a73; --faint:#9aa0a8;
  --brand:#2563eb; --brand-2:#1d4ed8; --brand-soft:#eaf1ff; --danger:#c23a35; --radius:8px;
  --font:"Inter",ui-sans-serif,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box} html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--text);
  font:15px/1.6 var(--font);-webkit-font-smoothing:antialiased}
.auth-wrap{min-height:100%;display:grid;place-items:center;padding:24px}
.auth-card{width:100%;max-width:380px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:32px 30px;box-shadow:0 1px 2px rgba(20,22,40,.04),0 10px 40px rgba(20,22,40,.07)}
.brand{display:flex;align-items:center;gap:10px;margin-bottom:22px}
.brand .dot{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.brand b{font-size:16px;letter-spacing:-.01em}
h1{font-size:20px;font-weight:600;margin:0 0 4px} .sub{color:var(--muted);margin:0 0 24px;font-size:14px}
label{display:block;font-size:13px;font-weight:500;color:var(--text);margin:16px 0 7px}
input[type=text],input[type=password]{width:100%;padding:10px 12px;border-radius:9px;
  border:1px solid var(--line-strong);background:#fff;color:var(--text);font:inherit;font-size:14px}
input[type=text]::placeholder,input[type=password]::placeholder{color:var(--faint)}
input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.row{display:flex;align-items:center;gap:8px;margin-top:16px;color:var(--muted);font-size:14px}
.btn{width:100%;margin-top:22px;padding:11px 14px;border:0;border-radius:9px;cursor:pointer;
  background:var(--brand);color:#fff;font-weight:600;font-size:14px;font-family:inherit}
.btn:hover{background:var(--brand-2)}
.err{margin-top:14px;color:var(--danger);font-size:13px;min-height:18px}
.foot{margin-top:20px;color:var(--faint);font-size:12px;text-align:center}

/* ===== Thanh đầu trang admin ===== */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:11px 24px;
  border-bottom:1px solid var(--line);background:var(--card)}
.topbar .brand{margin:0}
.topbar .brand b{font-size:15px}
.logout{font-size:14px;color:var(--muted);text-decoration:none;padding:7px 13px;border:1px solid var(--line-strong);
  border-radius:8px;transition:border-color .12s,color .12s,background .12s}
.logout:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

/* ===== Trang quản trị tài khoản ===== */
.admin-wrap{max-width:1280px;margin:0 auto;padding:28px 24px 64px}
.admin-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}
.admin-top h1{margin:0}
.admin-sub{color:var(--muted);font-size:14px;margin:0 0 22px}
.admin-bar{display:flex;gap:10px;align-items:center;margin:0 0 16px;flex-wrap:wrap}
.admin-bar input[type=text]{width:auto;min-width:240px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 1px 2px rgba(20,22,40,.04)}
table.users{width:100%;border-collapse:collapse;font-size:14px}
table.users th,table.users td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line)}
table.users th{color:var(--muted);font-weight:500;font-size:13px;background:#fafafa}
table.users tr:last-child td{border-bottom:0}
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}
.badge.admin{background:var(--brand-soft);color:var(--brand)}
.badge.locked{background:#fdecea;color:var(--danger)}
.badge.ok{background:#e9f6ec;color:#2e7d4f}
.note-cell{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}
/* Bảng tài khoản: Tên ĐN / Họ tên / Phòng ban hiển thị 1 dòng, ưu tiên không gian cho nội dung */
table.users.accounts td:nth-child(1),
table.users.accounts td:nth-child(2),
table.users.accounts td:nth-child(3),
table.users th:nth-child(2),
table.users th:nth-child(3){white-space:nowrap}
.actions{display:flex;gap:6px;flex-wrap:nowrap;justify-content:flex-end;align-items:center}
.actions form{margin:0;display:inline-flex}
/* Cột Thao tác co gọn theo nội dung → nhường không gian cho các cột nội dung */
table.users td:last-child,table.users th:last-child{white-space:nowrap;width:1%}
.btn-sm{display:inline-block;padding:6px 11px;border-radius:8px;border:1px solid var(--line-strong);
  background:#fff;color:var(--text);font:inherit;font-size:13px;font-weight:500;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn-sm:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm.danger:hover{border-color:var(--danger);color:var(--danger)}
.btn.inline{width:auto;margin:0;padding:9px 16px}
.flash{margin:0 0 16px;padding:10px 14px;border-radius:9px;font-size:14px}
.flash.ok{background:#e9f6ec;color:#2e7d4f} .flash.err{background:#fdecea;color:var(--danger)}
.admin-card{max-width:440px}
a.back{color:var(--muted);text-decoration:none;font-size:14px} a.back:hover{color:var(--brand)}

/* ===== Modal (dialog) ===== */
dialog.modal{border:1px solid var(--line);border-radius:14px;padding:24px 26px;width:100%;max-width:420px;
  background:var(--card);color:var(--text);box-shadow:0 12px 48px rgba(20,22,40,.18)}
dialog.modal::backdrop{background:rgba(30,32,44,.32);backdrop-filter:blur(2px)}
dialog.modal[open]{animation:pop .12s ease-out}
@keyframes pop{from{transform:translateY(6px);opacity:.6}to{transform:none;opacity:1}}
.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.modal-head h2{margin:0;font-size:18px}
.modal .x{border:0;background:none;color:var(--faint);font-size:16px;cursor:pointer;padding:4px;line-height:1}
.modal .x:hover{color:var(--text)}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}
dialog.modal{max-width:460px}

/* textarea + select trong form */
textarea{width:100%;padding:9px 12px;border-radius:8px;border:1px solid var(--line-strong);background:#fff;
  color:var(--text);font:inherit;font-size:14px;resize:vertical;min-height:54px}
textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
select{width:100%;height:40px;padding:0 34px 0 12px;border-radius:8px;border:1px solid var(--line-strong);
  background:#fff;color:var(--text);font:inherit;font-size:14px;cursor:pointer;-webkit-appearance:none;appearance:none;
  background-image:url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23646a73' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 11px center}
select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid2 > div{min-width:0}

/* Combobox tùy biến (search được) — nâng cấp từ select.combo */
.combo-wrap{position:relative}
.combo-btn{display:flex;align-items:center;justify-content:space-between;gap:8px;width:100%;height:40px;
  padding:0 12px;border-radius:8px;border:1px solid var(--line-strong);background:#fff;color:var(--text);
  font:inherit;font-size:14px;cursor:pointer;text-align:left;transition:border-color .12s,box-shadow .12s}
.combo-btn:hover{border-color:#c6c9d0}
.combo-btn:focus-visible{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.combo-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.combo-label.placeholder{color:var(--faint)}
.combo-btn svg{flex:none;color:var(--muted)}
.combo-panel{position:absolute;z-index:60;top:calc(100% + 6px);left:0;right:0;background:#fff;
  border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(16,24,40,.16);padding:6px}
.combo-search{width:100%;height:34px;margin-bottom:6px;padding:0 10px;border:1px solid var(--line-strong);
  border-radius:7px;font:inherit;font-size:14px}
.combo-search:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.combo-list{max-height:220px;overflow:auto;display:flex;flex-direction:column;gap:2px}
.combo-item{display:block;width:100%;text-align:left;background:none;border:0;border-radius:7px;padding:8px 10px;
  font:inherit;font-size:14px;color:var(--text);cursor:pointer}
.combo-item:hover{background:var(--panel-2)}
.combo-item.sel{color:var(--brand);font-weight:500;background:var(--brand-soft)}
.combo-empty{padding:8px 10px;color:var(--muted);font-size:13px}

/* Điều hướng trên thanh admin */
.topnav{display:flex;gap:4px;margin-left:18px}
.topnav a{padding:7px 12px;border-radius:8px;color:var(--muted);font-size:14px;font-weight:500;text-decoration:none}
.topnav a:hover{background:var(--brand-soft);color:var(--brand)}
.topnav a.active{background:var(--brand-soft);color:var(--brand)}

/* Khu thông tin người dùng trên thanh */
.topuser{margin-left:auto;display:flex;align-items:center;gap:10px}
.topuser-link{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--text);padding:5px 8px;border-radius:9px}
.topuser-link:hover{background:var(--panel-2)}
.topuser-name{font-size:14px;font-weight:500;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.avatar{width:30px;height:30px;border-radius:50%;object-fit:cover;flex:none}
.avatar-fallback{display:inline-flex;align-items:center;justify-content:center;background:var(--brand-soft);
  color:var(--brand);font-weight:600;font-size:13px}
.avatar-lg{width:60px;height:60px;border-radius:50%;object-fit:cover;flex:none;font-size:22px}
.avatar-row{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start;max-width:840px}
@media (max-width:760px){ .profile-grid{grid-template-columns:1fr} .topuser-name{display:none} }

/* Trang Hồ sơ cá nhân: một cột, canh giữa, card có padding */
.profile-narrow{max-width:560px;margin:0 auto;display:flex;flex-direction:column;gap:18px}
.profile-narrow .card{padding:22px 24px}
.profile-narrow form label:first-of-type{margin-top:8px}
input[type=file]{width:100%;font:inherit;font-size:13px;color:var(--muted)}
input[type=file]::file-selector-button{margin-right:12px;padding:7px 12px;border-radius:8px;border:1px solid var(--line-strong);
  background:#fff;color:var(--text);font:inherit;font-size:13px;font-weight:500;cursor:pointer}
input[type=file]::file-selector-button:hover{border-color:var(--brand);color:var(--brand)}
.card-title{margin:0 0 4px;font-size:16px;font-weight:600}
.form-foot{display:flex;justify-content:flex-end;margin-top:20px}