:root{
    --accent:#137a5e; --accent-d:#0f6650; --accent-soft:#e7f3ee;
    --bg:#f7f8fa; --card:#fff; --line:#e6e9ef; --surface:#fafbfc;
    --ink:#1a2030; --ink-2:#48505f; --muted:#6b7384; --muted-2:#8a92a0;
    --ok:#137a5e; --ok-soft:#e7f3ee;
    --warn:#b4690e; --warn-soft:#fbf0e1;
    --bad:#b42318; --bad-soft:#fdecea;
    --info:#2563eb; --info-soft:#e8eefc;
    --radius:14px; --radius-btn:9px; --radius-sm:7px;
    --shadow:0 1px 4px rgba(0,0,0,.08); --shadow-lg:0 8px 30px rgba(26,32,48,.10);
}
*{box-sizing:border-box}
body{
    margin:0;font-family:'IBM Plex Sans Thai',system-ui,sans-serif;background:var(--bg);
    color:var(--ink);font-size:14.5px;line-height:1.55;display:flex;min-height:100vh;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.tnum,.num,.mono{font-variant-numeric:tabular-nums}
.mono{font-family:ui-monospace,monospace}

/* ===== Sidebar ===== */
.sidebar{
    width:244px;flex:none;display:flex;flex-direction:column;padding:18px 14px;
    border-right:1px solid var(--line);background:#fff;position:sticky;top:0;height:100vh;
}
.sidebar .brand{display:flex;align-items:center;gap:10px;padding:4px 8px 18px}
.sidebar .logo{width:30px;height:30px;border-radius:8px;background:var(--accent);color:#fff;
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.sidebar .brand b{font-weight:600;font-size:15px;color:var(--ink)}
.nav-sec{font-size:11px;font-weight:600;letter-spacing:.04em;color:var(--muted-2);padding:14px 10px 6px}
.nav-item{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:var(--radius-sm);
    color:var(--ink-2);font-size:13.5px;font-weight:500;margin-bottom:2px}
.nav-item:hover{background:var(--surface);text-decoration:none}
.nav-item.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.nav-item.disabled{color:var(--muted-2);cursor:default;pointer-events:none}
.nav-item .ic{width:18px;text-align:center;opacity:.8}
.sidebar .user{margin-top:auto;border-top:1px solid var(--line);padding-top:12px;display:flex;align-items:center;gap:10px}
.sidebar .user .ava{width:32px;height:32px;border-radius:50%;background:var(--accent-soft);color:var(--accent);
    display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}
.sidebar .user .nm{color:var(--ink);font-size:13px;font-weight:500;line-height:1.25}
.sidebar .user .role{color:var(--muted-2);font-size:11px}

/* ===== Main ===== */
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.appbar{height:58px;flex:none;border-bottom:1px solid var(--line);background:#fff;
    display:flex;align-items:center;padding:0 24px;gap:12px;position:sticky;top:0;z-index:5}
.appbar .crumb{color:var(--muted);font-size:13.5px}
.appbar .spacer{margin-left:auto}
.content{flex:1;overflow-y:auto}
.container{padding:28px 32px;max-width:1180px}

/* ===== Page head ===== */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:22px}
.page-head h1{font-size:23px;font-weight:600;margin:0}
.page-head .sub{font-size:13.5px;color:var(--muted);margin-top:3px}
.head-actions{display:flex;gap:8px;align-items:center}

/* ===== Buttons ===== */
.btn{display:inline-block;padding:9px 16px;border-radius:var(--radius-btn);border:1px solid var(--line);
    background:#fff;color:var(--ink-2);font-family:inherit;font-size:13.5px;cursor:pointer;font-weight:500}
.btn:hover{background:var(--surface);text-decoration:none}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
.btn.primary:hover{background:var(--accent-d)}
.btn.danger{background:#fff;border-color:#f1c4bf;color:var(--bad)}
.btn.danger:hover{background:var(--bad-soft)}
.btn.sm{padding:6px 11px;font-size:12.5px}

/* ===== Table ===== */
.table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);
    border-radius:var(--radius);overflow:hidden}
.table th,.table td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
.table th{background:var(--surface);font-weight:600;font-size:12.5px;color:var(--accent)}
.table tr:last-child td{border-bottom:none}
.table .num{text-align:right}
.table tbody tr:hover{background:var(--surface)}

/* ===== Badge / status ===== */
.badge{display:inline-block;padding:3px 11px;border-radius:20px;font-size:12px;font-weight:600;background:#eef0f4;color:var(--muted)}
.s-draft{background:#eef0f4;color:#5b6473}
.s-sent{background:var(--info-soft);color:var(--info)}
.s-accepted,.s-paid{background:var(--ok-soft);color:var(--ok)}
.s-issued,.s-partially_paid{background:var(--warn-soft);color:var(--warn)}
.s-rejected,.s-voided,.s-overdue{background:var(--bad-soft);color:var(--bad)}

/* ===== Misc ===== */
.empty{background:#fff;border:1px dashed var(--line);border-radius:var(--radius);padding:48px;text-align:center;color:var(--muted)}
.alert{padding:12px 16px;border-radius:10px;margin-bottom:16px}
.alert.error{background:var(--bad-soft);color:var(--bad);border:1px solid #f1c4bf}

/* ===== Form ===== */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:13px;color:var(--muted);font-weight:500}
.field label .label-action{float:right;font-size:12.5px;font-weight:600}
.field input,.field select,.field textarea{
    padding:9px 11px;border:1px solid var(--line);border-radius:var(--radius-btn);font-family:inherit;font-size:14px;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
.inline{display:flex;gap:8px}.inline input{flex:1}
.section{font-size:17px;font-weight:600;margin:22px 0 10px}

.items input,.items select{width:100%;padding:7px 9px;border:1px solid var(--line);border-radius:var(--radius-sm);font-family:inherit;font-size:14px}
.items td{vertical-align:middle}
.items .disc{display:flex;gap:4px}.items .disc input{width:70px}
.line-total{font-variant-numeric:tabular-nums;text-align:right;display:block;font-weight:600}
.row-del{background:none;border:none;color:var(--bad);cursor:pointer;font-size:18px;line-height:1}

.totals-area{margin-top:20px;align-items:start}
.summary{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.summary .row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--line)}
.summary .row:last-of-type{border-bottom:none}
.summary .grand{font-size:18px;border-top:2px solid var(--ink);margin-top:6px;padding-top:12px}
.summary .grand b{color:var(--accent)}
.summary .collect{background:var(--warn-soft);color:var(--warn);font-weight:600;margin:2px -18px;padding:8px 18px;border-bottom:none}
.note-calc{font-size:12px;color:var(--muted);margin:10px 0 0}
.form-actions{margin-top:22px;display:flex;justify-content:flex-end}

.doc-meta{display:flex;gap:16px;align-items:center;color:var(--muted);margin-bottom:18px;font-size:14px;flex-wrap:wrap}
.parties{margin-bottom:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.card h3{margin:0 0 8px;font-size:14px;color:var(--muted)}
.muted{color:var(--muted)}.bad{color:var(--bad)}
.clamp{max-width:360px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.form-card{max-width:860px}
.doc-summary{max-width:380px;margin-left:auto;margin-top:18px}
.note-box{margin-top:18px}

.plan-setup{margin-top:18px}
.inst-setup{margin:10px 0}
.inst-setup input{width:100%;padding:6px 8px;border:1px solid var(--line);border-radius:var(--radius-sm);font-family:inherit}
.pct-total{margin:8px 0;font-size:14px}.pct-total .bad{margin-left:8px;font-weight:500}

.tax-banner{background:var(--accent-soft);border:1px solid #bfe0d3;color:var(--accent-d);padding:10px 14px;border-radius:10px;margin-bottom:14px;font-weight:500}
.receipt-box{margin-top:18px;background:#f0f6ff;border-color:#cfe0fb}
.receipt-form{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap}
.receipt-form .field{margin-bottom:0}
.back-link{margin-top:18px}

/* ===== Dashboard ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.stat .lbl{font-size:12.5px;color:var(--muted)}
.stat .big{font-size:27px;font-weight:600;margin:8px 0 6px;letter-spacing:-.01em}
.stat .delta{font-size:12px;color:var(--muted)}
.stat .delta.ok{color:var(--ok)}.stat .delta.warn{color:var(--warn)}

.dash-cols{display:grid;grid-template-columns:1.45fr 1fr;gap:16px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.panel-head h2{font-size:16px;font-weight:600;margin:0}
.panel-head a{font-size:13px}
.panel .table{border:none;border-radius:0}
.panel .table th{background:none;padding:8px 10px;border-bottom:1px solid var(--line)}
.panel .table td{padding:10px}

.due-item{display:flex;justify-content:space-between;align-items:center;padding:11px 12px;border:1px solid var(--line);
    border-radius:10px;margin-bottom:8px;color:var(--ink)}
.due-item:hover{background:var(--surface);text-decoration:none}
.due-no{font-size:13.5px;font-weight:600}
.due-cust{font-size:12.5px;color:var(--muted);margin-top:2px}
.due-right{text-align:right}
.due-amt{font-weight:600;font-variant-numeric:tabular-nums}
.due-date{font-size:12px;color:var(--muted);margin-top:2px}
.due-date.overdue{color:var(--bad);font-weight:600}
.due-total{display:flex;justify-content:space-between;padding-top:12px;margin-top:4px;border-top:2px solid var(--ink);font-size:15px}
.due-total b{color:var(--accent)}

@media(max-width:980px){.stats{grid-template-columns:repeat(2,1fr)}.dash-cols{grid-template-columns:1fr}}
@media(max-width:820px){
    body{flex-direction:column}
    .sidebar{width:auto;height:auto;position:static;flex-direction:row;flex-wrap:wrap;align-items:center;padding:10px 12px}
    .sidebar .brand{padding:0 12px 0 4px}
    .nav-sec,.sidebar .user{display:none}
    .nav-item{margin-bottom:0}
    .grid-2{grid-template-columns:1fr}
    .container{padding:18px}
}