/* ===== ฟอนต์ IBM Plex Sans Thai (เก็บไฟล์ไว้ในเครื่อง ไม่ต้องพึ่งอินเทอร์เน็ต/Google Fonts) ===== */
@font-face {
  font-family: 'IBM Plex Sans Thai';
  src: url('../fonts/IBMPlexSansThai-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Sans Thai';
  src: url('../fonts/IBMPlexSansThai-Medium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Sans Thai';
  src: url('../fonts/IBMPlexSansThai-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Sans Thai';
  src: url('../fonts/IBMPlexSansThai-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ===== Design tokens ===== */
:root {
  --color-bg: #f5f9fc;
  --color-surface: #ffffff;
  --color-ink: #27272a;
  --color-ink-soft: #71717a;
  --color-primary: #29a3e0;
  --color-primary-dark: #1c7fb5;
  --color-accent: #e3f3fc;
  --color-accent-dark: #c7e8f8;
  --color-danger: #b91c1c;
  --color-danger-bg: #fef2f2;
  --color-border: #e5eef3;
  --color-border-strong: #c7e8f8;
  --font-body: 'IBM Plex Sans Thai', 'TH Sarabun New', 'Sarabun', 'Leelawadee UI', 'Segoe UI', 'Tahoma', sans-serif;
  --font-mono: 'Consolas', 'Courier New', monospace;
  --radius-sm: 4px;
  --radius-md: 6px;
  --sidebar-width: 220px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
}

h1, h2, h3 { font-family: var(--font-body); font-weight: 700; color: var(--color-ink); margin: 0 0 .4em; }
h1 { font-size: 24px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }

a { color: var(--color-primary); }

.mono { font-family: var(--font-mono); }

/* ===== Layout shell ===== */
#app-header { position: relative; z-index: 10; }

.sidebar {
  background: var(--color-surface);
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-border);
  position: static;
  width: auto;
  padding: max(10px, env(safe-area-inset-top)) 16px 10px;
  display: flex;
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  row-gap: 8px;
}

.sidebar-top {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 14px;
  margin-bottom: 0;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-ink);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 600;
  flex-shrink: 0;
}
.back-btn:hover { background: var(--color-accent); color: var(--color-primary-dark); }

.sidebar .brand {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .1px;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  white-space: nowrap;
  flex: 1 1 auto;
  text-decoration: none;
  color: var(--color-ink);
}

.collapse-btn { display: none; }

.sidebar nav {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 200;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -2px 10px rgba(0,0,0,.05);
  display: flex;
  flex-direction: row;
  align-items: center;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 6px 6px calc(6px + env(safe-area-inset-bottom));
  gap: 2px;
}

.sidebar nav a {
  color: var(--color-ink-soft);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 14px;
  font-size: 10.5px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2px;
  white-space: nowrap;
  overflow: hidden;
  min-width: 62px;
  text-align: center;
  flex-shrink: 0;
}

.nav-icon { flex-shrink: 0; width: auto; text-align: center; font-size: 19px; }
.nav-label { overflow: hidden; text-overflow: ellipsis; }

.sidebar nav a:hover { background: var(--color-bg); color: var(--color-ink); }
.sidebar nav a.active { background: var(--color-accent); color: var(--color-primary-dark); font-weight: 600; }

.nav-group { margin-top: 0; padding-top: 0; border-top: none; margin-left: 4px; padding-left: 4px; border-left: 1px solid var(--color-border); flex-shrink: 0; display: flex; align-items: center; }
.nav-group-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2px;
  padding: 6px 12px;
  font-size: 10.5px;
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-ink-soft);
  background: transparent;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-align: center;
  min-width: 62px;
  flex-shrink: 0;
}
.nav-group-toggle:hover { background: var(--color-bg); color: var(--color-ink); }
.nav-group-toggle .nav-icon { font-size: 19px; }
.nav-caret { display: none; }
.nav-children {
  display: flex;
  flex-direction: row;
  gap: 2px;
}
.nav-children a { padding-left: 12px; }
.nav-children .nav-icon { width: auto; }

.sidebar .user-box {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-ink-soft);
  border-top: none;
  padding: 0;
  margin-top: 0;
  overflow: hidden;
  flex: 0 0 auto;
}

.sidebar .user-box .user-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.sidebar .user-box button {
  background: transparent;
  border: 1px solid var(--color-border-strong);
  color: var(--color-ink);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  width: auto;
  white-space: nowrap;
  overflow: hidden;
}
.sidebar .user-box button:hover { background: var(--color-bg); }

main {
  max-width: 100%;
  margin: 0 auto;
  padding: 24px 32px calc(40px + env(safe-area-inset-bottom));
  box-sizing: border-box;
}

/* ===== Cards / panels ===== */
.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  margin-bottom: 20px;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 12px;
  flex-wrap: wrap;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.stat-card.warn { border-left-color: var(--color-danger); }
.stat-card .stat-label { font-size: 13px; color: var(--color-ink-soft); }
.stat-card .stat-value { font-family: var(--font-mono); font-size: 26px; font-weight: 700; margin-top: 4px; }

/* ===== Hero card (สรุปหน้าแดชบอร์ดแบบแอพ) ===== */
.hero-card {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: 16px;
  padding: 18px 20px 0;
  color: #fff;
  margin-bottom: 20px;
  overflow: hidden;
}
.hero-tabs { display: flex; gap: 4px; background: rgba(255,255,255,.18); border-radius: 999px; padding: 4px; margin-bottom: 16px; }
.hero-tab {
  flex: 1;
  text-align: center;
  padding: 8px 6px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: rgba(255,255,255,.85);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hero-tab.active { background: #fff; color: var(--color-primary-dark); }
.hero-label { font-size: 13px; opacity: .9; }
.hero-value { font-family: var(--font-mono); font-size: 34px; font-weight: 700; margin: 4px 0 16px; }
.hero-sub-row {
  display: flex;
  justify-content: space-between;
  background: rgba(255,255,255,.14);
  border-radius: 12px 12px 0 0;
  padding: 14px 16px;
  margin: 0 -20px;
}
.hero-sub-item .hero-sub-label { font-size: 12px; opacity: .85; display: flex; align-items: center; gap: 6px; }
.hero-sub-item .hero-sub-value { font-family: var(--font-mono); font-size: 17px; font-weight: 700; margin-top: 2px; }
.hero-sub-dot { width: 8px; height: 8px; border-radius: 999px; background: #fff; display: inline-block; }
.hero-sub-item:last-child .hero-sub-dot { background: rgba(255,255,255,.5); }

.menu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 16px 8px;
  margin-bottom: 20px;
}
.menu-grid-item { display: flex; flex-direction: column; align-items: center; gap: 8px; text-decoration: none; text-align: center; }
.menu-grid-icon {
  width: 52px;
  height: 52px;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.menu-grid-item span { font-size: 12.5px; color: var(--color-ink); line-height: 1.3; }

/* ===== หน้าแรกหลังล็อกอิน (หน้าเปล่าตรงกลางจอ เลือกหมวดหมู่ใหญ่) ===== */
.home-hub {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #fff;
  padding: 20px;
  box-sizing: border-box;
}
.home-hub-back,
.home-hub-logout {
  position: fixed;
  top: max(16px, env(safe-area-inset-top));
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13.5px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,.06);
  color: var(--color-ink);
  font-family: var(--font-body);
}
.home-hub-back { left: 16px; display: none; }
.home-hub-logout { right: 16px; }
.home-hub-brand { font-weight: 700; font-size: 17px; margin-bottom: 6px; display:flex; align-items:center; gap:8px; }
.home-hub-brand-text { font-size: 20px; font-weight: 700; }
.brand-text { font-size: 16px; font-weight: 700; color: inherit; }
.login-brand-text { font-size: 22px; font-weight: 700; text-align: center; margin: 0 auto 12px; }
.home-hub-title { font-size: 14px; color: var(--color-ink-soft); margin-bottom: 32px; }
.home-hub-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 28px 24px; max-width: 480px; }
.home-hub-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  cursor: pointer;
  width: 110px;
  text-align: center;
  border: none;
  background: none;
  font-family: var(--font-body);
}
.home-hub-icon {
  width: 84px;
  height: 84px;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
}
.home-hub-item span { font-size: 13.5px; color: var(--color-ink); font-weight: 600; }

/* ===== Forms ===== */
label { display: block; font-size: 13px; color: var(--color-ink-soft); margin-bottom: 4px; }

input, select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px;
  background: #fff;
  color: var(--color-ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}

.field { margin-bottom: 14px; }
.field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }

button, .btn {
  font-family: var(--font-body);
  font-size: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 9px 16px;
  cursor: pointer;
  font-weight: 600;
}

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-accent { background: var(--color-accent); color: #0c4a6e; }
.btn-accent:hover { background: var(--color-accent-dark); color: #fff; }

.btn-outline { background: transparent; border-color: var(--color-border-strong); color: var(--color-ink); }
.btn-outline:hover { background: var(--color-bg); }

.btn-danger { background: var(--color-danger-bg); color: var(--color-danger); border-color: #fecaca; }

/* ===== Tables ===== */
table { width: 100%; border-collapse: collapse; font-size: 14px; table-layout: fixed; }
th, td { padding: 9px 10px; border-bottom: 1px solid var(--color-border); text-align: left; overflow-wrap: break-word; }
table th:last-child, table td:last-child { width: 140px; }
table td:last-child button, table td:last-child a.btn { padding: 5px 10px; font-size: 12.5px; }
th { font-size: 12.5px; text-transform: none; color: var(--color-ink-soft); font-weight: 600; border-bottom: 2px solid var(--color-border-strong); }
td.num, th.num { text-align: right; font-family: var(--font-mono); }
tr.low-stock td { background: var(--color-danger-bg); }
tr.low-stock td:first-child { border-left: 3px solid var(--color-danger); }

.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; background: var(--color-bg); color: var(--color-ink-soft); border: 1px solid var(--color-border); }

/* ===== เมนู dropdown รวมปุ่มการดำเนินการในตาราง ===== */
.action-dropdown { position: relative; display: inline-block; }
.action-dropdown-menu {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgba(0,0,0,.12);
  min-width: 170px;
  z-index: 60;
  overflow: hidden;
  flex-direction: column;
}
.action-dropdown-menu.open { display: flex; }
.action-dropdown-menu a,
.action-dropdown-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 9px 14px;
  border: none;
  border-radius: 0;
  background: transparent;
  font-size: 13.5px;
  font-weight: 400;
  color: var(--color-ink);
  text-decoration: none;
  cursor: pointer;
}
.action-dropdown-menu a:hover,
.action-dropdown-menu button:hover { background: var(--color-bg); }
.action-dropdown-menu .delete-txn-btn,
.action-dropdown-menu .delete-user-btn,
.action-dropdown-menu .delete-category-btn,
.action-dropdown-menu .delete-btn { color: var(--color-danger); }
.tag.danger { background: var(--color-danger-bg); color: var(--color-danger); }

.msg { padding: 10px 14px; border-radius: var(--radius-sm); font-size: 14px; margin-bottom: 14px; }
.msg.error { background: var(--color-danger-bg); color: var(--color-danger); border: 1px solid #fecaca; }
.msg.success { background: #eff8fe; color: var(--color-primary-dark); border: 1px solid var(--color-border-strong); }

/* ===== popup แจ้งเตือนกลางจอ (เช่น "บันทึกเรียบร้อยแล้ว") ===== */
#globalToast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.92);
  background: var(--color-primary-dark);
  color: #fff;
  padding: 16px 30px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  text-align: center;
  max-width: min(90vw, 420px);
}
#globalToast.show { opacity: 1; transform: translate(-50%, -50%) scale(1); }

.empty-state { color: var(--color-ink-soft); padding: 30px 0; text-align: center; font-size: 14px; }

/* เอกสารที่พิมพ์/ส่งออกเป็น PDF ใช้ฟอนต์เว็บที่โหลดแน่นอนเสมอ กันสระ/วรรณยุกต์เพี้ยนตอนแปลงเป็นรูปภาพ (html2canvas) */
.voucher-paper, #printArea { font-family: 'IBM Plex Sans Thai', var(--font-body); }

.product-group { border: 1px solid var(--color-border); border-radius: var(--radius-sm); margin-bottom: 10px; overflow: hidden; }
.product-group summary {
  cursor: pointer;
  padding: 12px 16px;
  background: var(--color-bg);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
}
.product-group summary::-webkit-details-marker { display: none; }
.product-group summary .count-badge { font-weight: 400; color: var(--color-ink-soft); font-size: 13px; }
.product-group table { margin: 0; }
.product-group[open] summary { border-bottom: 1px solid var(--color-border); }
.low-stock-pill {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
  font-size: 13px;
}

/* ===== Login page ===== */
.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, var(--color-primary-dark), var(--color-primary) 140%);
}
.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 36px 34px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 12px 30px rgba(0,0,0,.18);
  border-top: 4px solid var(--color-accent);
}
.login-card h1 { font-size: 20px; margin-bottom: 2px; }
.login-card p.sub { color: var(--color-ink-soft); font-size: 13px; margin-bottom: 20px; text-align: center; }
.login-card button { width: 100%; margin-top: 6px; }

@media (max-width: 860px) {
  main { padding: 18px 12px calc(40px + env(safe-area-inset-bottom)); }

  /* ตารางกว้างเกินจอมือถือ ให้เลื่อนดูแนวนอนได้ในกรอบของตัวเอง แทนที่จะดันทั้งหน้าให้กว้างเกิน */
  .panel { overflow-x: auto; }
  table { min-width: 560px; }

  /* ฟอร์มแบบหลายคอลัมน์ ให้ซ้อนกันเป็นคอลัมน์เดียวบนจอแคบ อ่าน/กรอกง่ายขึ้น */
  .field-row { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }

  /* แถวรายการค่าใช้จ่ายย่อย (รายละเอียด/จำนวน/ราคา/รวม/ลบ) ให้ซ้อนแนวตั้งแทนเบียดกันแนวนอน */
  .line-item-row { flex-direction: column; align-items: stretch; gap: 6px; }
  .line-item-row .remove-line-item-btn { width: 100%; }
}