:root{
  --navy:#164f75;--blue:#2276a8;--blue-l:#eaf4fb;--line:#d9e1e7;--bg:#f2f5f8;--text:#1f2d3a;--muted:#6b7a88;
  --green:#22915a;--orange:#d9781c;--red:#c0392b;--card:#fff;--radius:10px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:'Sarabun',Tahoma,'Segoe UI',sans-serif;font-size:15px;line-height:1.55;color:var(--text);background:var(--bg);min-height:100vh;display:flex;flex-direction:column}
a{color:var(--blue)}
h1,h2,h3{color:var(--navy);line-height:1.3;margin:0 0 .6em}
h1{font-size:1.45rem}h2{font-size:1.15rem}h3{font-size:1rem}

/* ---------- topbar ---------- */
.topbar{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.18);position:sticky;top:0;z-index:50}
.topbar-inner{max-width:1240px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;margin-right:auto;min-width:0}
.brand-icon{font-size:26px}
.brand b{display:block;font-size:16px}
.brand small{display:block;font-size:12px;opacity:.8;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.userbox{display:flex;align-items:center;gap:14px;font-size:13px}
.userbox a{color:#fff;opacity:.85;text-decoration:none}
.userbox a:hover{opacity:1;text-decoration:underline}
.userbox .logout{background:rgba(255,255,255,.15);padding:4px 10px;border-radius:6px}
.badge{font-style:normal;background:#f5b041;color:#4a2f00;border-radius:10px;padding:1px 7px;font-size:11px;font-weight:700}
.mainnav{background:rgba(0,0,0,.14)}
.nav-inner{max-width:1240px;margin:0 auto;padding:0 10px;display:flex;flex-wrap:wrap;gap:2px}
.mainnav a{color:#fff;text-decoration:none;padding:8px 11px;font-size:14px;opacity:.88;border-bottom:3px solid transparent}
.mainnav a:hover{opacity:1;background:rgba(255,255,255,.08)}
.mainnav a.on{opacity:1;border-bottom-color:#f5b041;font-weight:700}
.mainnav a.admin{color:#ffe7b3}
.nav-sep{color:#fff;opacity:.55;font-size:12px;padding:10px 4px 0 14px}
.nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.4);color:#fff;font-size:20px;border-radius:6px;padding:2px 10px;cursor:pointer}

/* ---------- layout ---------- */
.container{max-width:1240px;width:100%;margin:0 auto;padding:22px 16px 40px;flex:1}
.footer{text-align:center;color:var(--muted);font-size:12px;padding:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:18px;box-shadow:0 1px 3px rgba(20,40,60,.05)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.card-head h2,.card-head h1{margin:0}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.muted{color:var(--muted)}
.small{font-size:13px}
.right{text-align:right}
.center{text-align:center}
.nowrap{white-space:nowrap}

/* ---------- stat cards ---------- */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;border-top:4px solid var(--blue)}
.stat .label{font-size:13px;color:var(--muted)}
.stat .value{font-size:30px;font-weight:700;color:var(--navy);line-height:1.2}
.stat .value small{font-size:14px;font-weight:400;color:var(--muted)}
.stat .sub{font-size:12.5px;color:var(--muted)}
.stat.vacation{border-top-color:var(--green)}
.stat.sick{border-top-color:var(--red)}
.stat.personal{border-top-color:var(--orange)}
.stat.maternity{border-top-color:#8e44ad}
.bar{height:7px;background:#e6ecf1;border-radius:4px;overflow:hidden;margin:6px 0 4px}
.bar span{display:block;height:100%;background:var(--green)}

/* ---------- forms ---------- */
.form-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:12px 14px}
.f{display:flex;flex-direction:column;grid-column:span 12}
.f.s2{grid-column:span 2}.f.s3{grid-column:span 3}.f.s4{grid-column:span 4}.f.s5{grid-column:span 5}.f.s6{grid-column:span 6}.f.s8{grid-column:span 8}
.f label,.lbl{font-size:13px;font-weight:600;color:#44515d;margin-bottom:3px}
.f .hint{font-size:12px;color:var(--muted);margin-top:3px}
input[type=text],input[type=password],input[type=date],input[type=number],select,textarea{
  font:inherit;font-size:15px;border:1px solid #c5d0d8;border-radius:7px;padding:7px 10px;background:#fbfcfd;width:100%;color:var(--text)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(34,118,168,.13)}
input[readonly]{background:#eef2f5;color:#4b5966}
textarea{min-height:70px;resize:vertical}
.req{color:var(--red)}
.radio-row{display:flex;flex-wrap:wrap;gap:8px}
.radio-row label{display:flex;align-items:center;gap:6px;border:1px solid #c5d0d8;border-radius:8px;padding:8px 14px;cursor:pointer;background:#fbfcfd;font-weight:600}
.radio-row input{margin:0}
.radio-row label:has(input:checked){border-color:var(--blue);background:var(--blue-l);color:var(--navy)}
.section-title{grid-column:span 12;font-weight:700;color:var(--navy);border-bottom:2px solid var(--blue);padding-bottom:3px;margin-top:6px}
.form-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.inline-form{display:inline-flex;gap:8px;align-items:center;flex-wrap:wrap;margin:0}
.inline-form label{display:flex;align-items:center;gap:6px;font-size:14px;font-weight:600}
.inline-form select,.inline-form input{width:auto}
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.filters .f{grid-column:auto;min-width:150px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:6px;border:0;border-radius:7px;padding:8px 15px;font:inherit;font-size:14px;font-weight:600;cursor:pointer;text-decoration:none;background:#e9eef2;color:var(--navy);white-space:nowrap;transition:filter .15s}
.btn:hover{filter:brightness(.95)}
.btn-primary{background:var(--blue);color:#fff}
.btn-green{background:var(--green);color:#fff}
.btn-orange{background:var(--orange);color:#fff}
.btn-red{background:var(--red);color:#fff}
.btn-sm{padding:4px 10px;font-size:13px}
.btn-lg{padding:12px 20px;font-size:16px}
.link-btn{background:none;border:0;color:var(--red);cursor:pointer;font:inherit;font-size:13px;padding:0;text-decoration:underline}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
.tbl th{background:#f3f7fa;color:#3a4a58;font-weight:700;font-size:13px;white-space:nowrap}
.tbl tbody tr:hover{background:#f8fbfd}
.tbl td.num,.tbl th.num{text-align:right;font-variant-numeric:tabular-nums}
.tbl tfoot td{font-weight:700;background:#f3f7fa}
.tbl input[type=number]{width:82px;padding:4px 6px;text-align:right}
.tbl input[type=text]{padding:4px 6px}
.actions{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.tag{display:inline-block;border-radius:12px;padding:1px 9px;font-size:12px;font-weight:700;white-space:nowrap}
.tag-vacation{background:#e3f5ea;color:#1b7a48}
.tag-sick{background:#fbe5e2;color:#a83224}
.tag-personal{background:#fdeedd;color:#a85a10}
.tag-maternity{background:#f1e5f7;color:#76389a}
.tag-gray{background:#eceff1;color:#56636e}
.empty{text-align:center;color:var(--muted);padding:26px}

/* ---------- alerts ---------- */
.alert{border-radius:8px;padding:10px 14px;margin-bottom:14px;border:1px solid}
.alert-success{background:#e8f6ee;border-color:#b7e1c8;color:#1b6b3f}
.alert-error{background:#fdecea;border-color:#f3c0b9;color:#9b2c20}
.alert-warning{background:#fff6e0;border-color:#f2d58a;color:#7a5600}
.alert-info{background:var(--blue-l);border-color:#b9dcf0;color:var(--navy)}

/* ---------- info box ---------- */
.infobox{background:var(--blue-l);border:1px solid #b9dcf0;border-radius:var(--radius);padding:14px 16px}
.infobox dl{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;margin:0}
.infobox dt{color:var(--muted);font-size:13.5px}
.infobox dd{margin:0;font-weight:700;color:var(--navy);text-align:right}
.infobox .big{font-size:22px}

/* ---------- login ---------- */
.login-wrap{min-height:calc(100vh - 140px);display:flex;align-items:center;justify-content:center}
.login-card{width:100%;max-width:400px}
.login-card h1{text-align:center}
.login-card .btn{width:100%;justify-content:center}

/* ---------- report print ---------- */
.print-only{display:none}
@media print{
  @page{size:A4 landscape;margin:12mm}
  body{background:#fff;font-size:12px}
  .topbar,.footer,.no-print,.alert{display:none!important}
  .container{max-width:none;padding:0}
  .card{border:0;box-shadow:none;padding:0}
  .print-only{display:block}
  .tbl th,.tbl td{padding:4px 6px;border:1px solid #999}
  a{color:inherit;text-decoration:none}
}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:1fr}
  .f.s2,.f.s3,.f.s4{grid-column:span 6}
  .f.s5,.f.s6,.f.s8{grid-column:span 12}
}
@media (max-width:720px){
  .grid-2{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .userbox{display:none}
  .mainnav{display:none}
  body.nav-open .mainnav,body.nav-open .userbox{display:flex}
  body.nav-open .topbar-inner{flex-wrap:wrap}
  body.nav-open .userbox{width:100%;justify-content:space-between;flex-wrap:wrap}
  .nav-inner{flex-direction:column}
  .nav-sep{padding:8px 11px 2px}
  .stat .value{font-size:24px}
  .container{padding:16px 12px 32px}
  .card{padding:14px}
}
@media (max-width:480px){
  .grid-4{grid-template-columns:1fr}
  .f.s2,.f.s3,.f.s4{grid-column:span 12}
}

/* ---------- เพิ่มเติม ---------- */
.f.form-actions{flex-direction:row}
.layout-side{grid-template-columns:minmax(0,2fr) minmax(260px,1fr);align-items:start}
@media (max-width:900px){.layout-side{grid-template-columns:1fr}}