:root {
  --bg: #f1f4f8;
  --surface: #ffffff;
  --border: #dde3ec;
  --text: #1c2434;
  --muted: #6b7688;
  --primary: #1d4ed8;
  --primary-dark: #1a3fae;
  --success: #067647;
  --danger: #b42318;
  --warning: #b54708;
  --sidebar: #101a2e;
  --sidebar-hover: #1c2a45;
  --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: "Sarabun", "TH Sarabun New", "Noto Sans Thai", Tahoma, "Segoe UI", sans-serif;
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- โครงหน้า ---------- */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 232px;
  flex: 0 0 232px;
  background: var(--sidebar);
  color: #c7d0e0;
  padding: 16px 0 32px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand { display: flex; gap: 10px; align-items: center; padding: 0 18px 18px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 8px; background: var(--primary);
  color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 14px;
}
.brand strong { display: block; color: #fff; font-size: 15px; }
.brand small { color: #8291ab; font-size: 11px; }

.nav { display: flex; flex-direction: column; }
.nav-group {
  padding: 14px 18px 6px; font-size: 11px; letter-spacing: .08em;
  text-transform: uppercase; color: #6b7a95;
}
.nav-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 18px; color: #c7d0e0; font-size: 14px;
}
.nav-item:hover { background: var(--sidebar-hover); color: #fff; text-decoration: none; }
.nav-item.active { background: var(--primary); color: #fff; }
.nav-item .ic { font-size: 10px; opacity: .7; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 12px 24px; position: sticky; top: 0; z-index: 20;
}
.topbar h1 { font-size: 18px; margin: 0; }
.topbar-user { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 14px; }
.topbar-user form { margin: 0; }

.content { padding: 20px 24px 48px; }

/* ---------- การ์ด ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 16px;
}
.card-head {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
}
.card-head h2 { font-size: 15px; margin: 0; }
.card-body { padding: 16px; }
.card-body.tight { padding: 0; }

.grid { display: grid; gap: 16px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1100px) {
  .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
}

.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 4px; }
.stat .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

/* ---------- ตาราง ---------- */
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td { padding: 8px 12px; border-bottom: 1px solid var(--border); text-align: left; }
table.data thead th {
  background: #f7f9fc; color: var(--muted); font-weight: 600; font-size: 13px;
  position: sticky; top: 0;
}
table.data tbody tr:hover { background: #f7f9fc; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data td.center, table.data th.center { text-align: center; }
table.data tfoot td { font-weight: 700; background: #f7f9fc; border-top: 2px solid var(--border); }
.table-wrap { overflow-x: auto; }

.empty { padding: 40px; text-align: center; color: var(--muted); }

/* ---------- ฟอร์ม ---------- */
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input[type=text], input[type=password], input[type=date], input[type=number], input[type=search],
select, textarea {
  width: 100%; padding: 7px 10px; border: 1px solid var(--border); border-radius: 6px;
  font: inherit; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(29, 78, 216, .12);
}
input[readonly] { background: #f4f6fa; color: var(--muted); }
textarea { resize: vertical; min-height: 64px; }
.form-row { display: flex; gap: 12px; flex-wrap: wrap; }
.form-row > .field { flex: 1; min-width: 160px; }
.checkbox { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; }
.checkbox input { width: auto; }

/* ---------- ปุ่ม ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 7px 14px; border-radius: 6px; border: 1px solid transparent;
  background: var(--primary); color: #fff; font: inherit; cursor: pointer;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn-secondary { background: #fff; border-color: var(--border); color: var(--text); }
.btn-secondary:hover { background: #f1f4f8; color: var(--text); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #90211a; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--muted); }
.btn-ghost:hover { background: #f1f4f8; color: var(--text); }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ---------- แจ้งเตือน ---------- */
.alert { margin: 12px 24px 0; padding: 10px 14px; border-radius: 6px; font-size: 14px; }
.alert-success { background: #e7f6ee; color: var(--success); border: 1px solid #b7e4cb; }
.alert-danger  { background: #fdeceb; color: var(--danger);  border: 1px solid #f5c4c0; }
.alert-warning { background: #fef4e6; color: var(--warning); border: 1px solid #f7d9ac; }
.content .alert { margin: 0 0 16px; }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 12px; background: #eef2f8; color: var(--muted);
}
.badge.ok { background: #e7f6ee; color: var(--success); }
.badge.warn { background: #fef4e6; color: var(--warning); }

/* ---------- ตารางรายการสินค้าในเอกสาร ---------- */
.items-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.items-table th {
  background: #f7f9fc; padding: 7px 8px; border: 1px solid var(--border);
  font-size: 13px; color: var(--muted); font-weight: 600;
}
.items-table td { border: 1px solid var(--border); padding: 0; }
.items-table input {
  border: none; border-radius: 0; padding: 6px 8px; width: 100%; background: transparent;
}
.items-table input:focus { box-shadow: inset 0 0 0 2px rgba(29,78,216,.25); }
.items-table input.num { text-align: right; font-variant-numeric: tabular-nums; }
.items-table td.seq { text-align: center; color: var(--muted); font-size: 13px; padding: 6px; width: 38px; }
.items-table td.act { text-align: center; width: 38px; }
.items-table .row-del {
  border: none; background: transparent; color: var(--danger); cursor: pointer; font-size: 15px;
}

.totals { max-width: 360px; margin-left: auto; }
.totals .line { display: flex; justify-content: space-between; padding: 5px 0; font-size: 14px; }
.totals .line.grand {
  border-top: 2px solid var(--border); margin-top: 6px; padding-top: 10px;
  font-size: 18px; font-weight: 700;
}
.totals .val { font-variant-numeric: tabular-nums; }

.suggest {
  position: absolute; z-index: 40; background: #fff; border: 1px solid var(--border);
  border-radius: 6px; box-shadow: 0 8px 24px rgba(16, 26, 46, .15);
  max-height: 260px; overflow-y: auto; min-width: 320px;
}
.suggest div { padding: 7px 12px; cursor: pointer; font-size: 14px; }
.suggest div:hover, .suggest div.active { background: #eef2f8; }
.suggest small { color: var(--muted); }

/* ---------- หน้า login ---------- */
body.centered { display: grid; place-items: center; min-height: 100vh; background: #101a2e; }
.login-card {
  width: 340px; background: #fff; border-radius: 12px; padding: 28px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, .35);
}
.login-card h1 { font-size: 20px; margin: 0 0 4px; }
.login-card p.sub { color: var(--muted); font-size: 13px; margin: 0 0 20px; }

/* ---------- อื่น ๆ ---------- */
.toolbar {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-end;
  margin-bottom: 12px;
}
.toolbar .field { margin: 0; }
.toolbar .spacer { flex: 1; }
.pager { display: flex; gap: 6px; align-items: center; justify-content: flex-end; padding: 12px 16px; font-size: 14px; }
.muted { color: var(--muted); }
.text-right { text-align: right; }
.mono { font-variant-numeric: tabular-nums; }
.error-list { margin: 0 0 12px; padding: 10px 14px 10px 30px; background: #fdeceb; border: 1px solid #f5c4c0; border-radius: 6px; color: var(--danger); }

.bars { display: flex; align-items: flex-end; gap: 6px; height: 130px; padding-top: 8px; }
.bars .bar { flex: 1; background: var(--primary); border-radius: 3px 3px 0 0; min-height: 2px; position: relative; }
.bars .bar span { position: absolute; bottom: -20px; left: 0; right: 0; text-align: center; font-size: 11px; color: var(--muted); }
.bars-wrap { padding-bottom: 24px; }

/* =====================================================================
   การแสดงผลบนจอเล็ก (มือถือ / แท็บเล็ต)
   ===================================================================== */

/* ปุ่มเปิดเมนู — ซ่อนไว้บนจอใหญ่ */
.menu-toggle {
  display: none;
  width: 40px; height: 40px; flex: 0 0 40px;
  border: 1px solid var(--border); border-radius: 8px; background: #fff;
  cursor: pointer; padding: 0;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.menu-toggle span { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; }

.sidebar-backdrop { display: none; }

@media (max-width: 900px) {
  /* เมนูข้างกลายเป็นลิ้นชักที่เลื่อนเข้ามาจากซ้าย */
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 60;
    height: 100dvh; width: 260px; flex-basis: 260px;
    transform: translateX(-100%);
    transition: transform .22s ease;
    box-shadow: 0 0 32px rgba(0, 0, 0, .35);
  }
  body.menu-open .sidebar { transform: translateX(0); }

  .sidebar-backdrop {
    display: block; position: fixed; inset: 0; z-index: 50;
    background: rgba(10, 16, 28, .55);
    opacity: 0; pointer-events: none; transition: opacity .22s ease;
  }
  body.menu-open .sidebar-backdrop { opacity: 1; pointer-events: auto; }
  body.menu-open { overflow: hidden; }

  .menu-toggle { display: flex; }
  .topbar { gap: 10px; padding: 10px 14px; }
  .topbar h1 {
    font-size: 16px; flex: 1; min-width: 0;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  }
  .topbar-user .user-name { display: none; }

  .content { padding: 14px; }
  .alert { margin: 10px 14px 0; }
  .card-head { flex-wrap: wrap; }
}

@media (max-width: 768px) {
  .grid.cols-4, .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }

  /* แถบเครื่องมือค้นหา: เรียงลงมาทีละบรรทัด ปุ่มกดง่าย */
  .toolbar { flex-direction: column; align-items: stretch; gap: 10px; }
  .toolbar .field, .toolbar input, .toolbar select { width: 100%; }
  .toolbar .spacer { display: none; }
  .toolbar .btn { width: 100%; }

  .form-row { flex-direction: column; gap: 0; }
  .form-row > .field { max-width: none !important; width: 100%; }

  .btn-row { gap: 10px; }
  .btn-row .btn { flex: 1 1 auto; }

  .totals { max-width: none; }
  .card-body { padding: 14px; }
  .stat .value { font-size: 20px; }

  /* ปุ่มและช่องกรอกให้นิ้วแตะได้สะดวก + กัน iOS ซูมอัตโนมัติ (ต้อง >= 16px) */
  input[type=text], input[type=password], input[type=date], input[type=number],
  input[type=search], select, textarea { font-size: 16px; padding: 10px 12px; }
  .btn { padding: 10px 16px; min-height: 42px; }
  .btn-sm { padding: 7px 12px; min-height: 36px; font-size: 14px; }

  /* ---- ตารางข้อมูลกลายเป็นการ์ด (ชื่อคอลัมน์มาจาก data-label ที่ app.js เติมให้) ---- */
  table.data thead { display: none; }
  table.data, table.data tbody, table.data tr, table.data td { display: block; width: 100%; }
  table.data tr {
    border: 1px solid var(--border); border-radius: 10px;
    margin: 0 0 10px; padding: 10px 12px; background: #fff;
  }
  table.data tr:hover { background: #fff; }
  table.data td {
    border: none; padding: 4px 0;
    display: flex; align-items: baseline; gap: 10px;
    text-align: left !important;
    flex-wrap: wrap; overflow-wrap: anywhere;   /* ชื่อยาว ๆ ต้องตัดบรรทัดได้ ไม่ดันขอบจอ */
  }
  table.data td::before {
    content: attr(data-label);
    flex: 0 0 40%; max-width: 40%;
    color: var(--muted); font-size: 13px;
  }
  table.data td:empty { display: none; }
  table.data td.num { justify-content: space-between; }
  table.data td.num::before { flex-basis: auto; }

  /* ช่องที่กินหลายคอลัมน์ (แถวฟอร์มแก้ไข) แสดงเต็มความกว้าง ไม่ต้องมีหัวข้อ */
  table.data td[colspan] { display: block; padding: 10px 0 0; }
  table.data td[colspan]::before { content: none; }
  table.data tr:has(> td[colspan]) { padding: 0 10px 10px; }

  /* คอลัมน์ที่ทำเครื่องหมาย hide-sm จะถูกซ่อนบนจอแคบ เพื่อไม่ให้การ์ดยาวเกินไป */
  table.data .hide-sm { display: none !important; }

  .checkbox { flex-wrap: wrap; }

  /* ช่องปุ่มจัดการ: ย้ายไปเป็นแถวล่างสุดของการ์ด */
  table.data tbody td:last-child.center {
    margin-top: 8px; padding-top: 10px; border-top: 1px dashed var(--border);
  }
  table.data tbody td:last-child.center::before { content: none; }
  table.data tbody td:last-child.center .btn-row { width: 100%; justify-content: flex-start !important; }
  table.data td form { display: inline-flex; }

  /* กราฟยอดขายรายเดือนบนจอแคบ */
  .bars { gap: 3px; height: 110px; }
  .bars .bar span { font-size: 9px; }
  table.data tfoot { display: block; }
  table.data tfoot td { background: transparent; }
  table.data tfoot tr { background: #f7f9fc; }
  .card-body.tight { padding: 10px; }
  .table-wrap { overflow-x: visible; }

  .pager { justify-content: center; }
}

/* ---- ตารางคีย์รายการสินค้าในเอกสาร ---- */
@media (max-width: 820px) {
  .items-table thead { display: none; }
  .items-table, .items-table tbody, .items-table tr, .items-table td { display: block; width: 100%; }
  .items-table tr {
    position: relative;
    border: 1px solid var(--border); border-radius: 10px;
    margin-bottom: 12px; padding: 8px 10px 10px;
  }
  .items-table td { border: none; padding: 3px 0; display: flex; align-items: center; gap: 10px; }
  .items-table td::before {
    content: attr(data-label);
    flex: 0 0 92px; color: var(--muted); font-size: 13px;
  }
  .items-table input { border: 1px solid var(--border); border-radius: 6px; padding: 9px 10px; font-size: 16px; }
  .items-table input.num { text-align: right; }

  .items-table td.seq {
    display: block; width: auto; font-weight: 700; color: var(--text);
    padding: 0 0 6px; margin-bottom: 6px; border-bottom: 1px dashed var(--border);
    text-align: left; font-size: 14px;
  }
  .items-table td.seq::before { content: 'รายการที่ '; flex: none; color: var(--muted); font-weight: 400; }

  .items-table td.act {
    position: absolute; top: 6px; right: 8px; width: auto; padding: 0;
  }
  .items-table td.act::before { content: none; }
  .items-table .row-del { font-size: 22px; line-height: 1; padding: 4px 8px; }

  /* กล่องแนะนำผลค้นหาให้กว้างพอดีจอ */
  .suggest { max-width: calc(100vw - 24px); min-width: 0 !important; }
  .suggest div { padding: 11px 14px; }

  /* ปุ่มเพิ่มบรรทัดใช้บ่อย ทำให้กดง่ายเต็มความกว้าง */
  #add-row { width: 100%; min-height: 44px; font-size: 15px; }
  .card-head .btn-row { width: 100%; }
}

@media (max-width: 480px) {
  html, body { font-size: 14px; }
  .content { padding: 12px 10px 32px; }
  .alert { margin: 10px 10px 0; }
  .card { border-radius: 10px; }
  .card-head { padding: 10px 12px; }
  .topbar { padding: 8px 10px; }
  .login-card { width: 100%; max-width: 360px; margin: 0 12px; padding: 22px; }
  table.data td::before { flex-basis: 45%; max-width: 45%; }
  .items-table td::before { flex: 0 0 78px; font-size: 12px; }
}

/* จอสูงจำกัด (มือถือแนวนอน) — ให้เมนูเลื่อนดูได้ */
@media (max-height: 480px) and (max-width: 900px) {
  .sidebar { overflow-y: auto; }
}