* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #eef1f6;
  --panel: #ffffff;
  --sidebar-bg: #111827;
  --sidebar-text: #9ca3af;
  --sidebar-active: #2563eb;
  --brand: #3b82f6;
  --text: #1f2937;
  --text-dim: #6b7280;
  --border: #e5e7eb;
  --hover: #f3f4f6;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --radius: 10px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

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

/* ---------- Sidebar ---------- */
.sidebar {
  width: 260px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: bold;
}
.brand strong { display: block; color: #fff; font-size: 16px; letter-spacing: 0.5px; }
.brand small { color: var(--sidebar-text); font-size: 11px; }

.role-box {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.role-box span { display: block; font-size: 11px; margin-bottom: 6px; color: #6b7280; }
.role-box select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 13px;
  outline: none;
}

#nav {
  flex: 1;
  padding: 10px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: none;
  color: var(--sidebar-text);
  font-size: 13px;
  text-align: left;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.nav-item:hover { background: rgba(255,255,255,0.06); color: #e5e7eb; }
.nav-item.active { background: var(--sidebar-active); color: #fff; }
.nav-item b { background: var(--red); color: #fff; border-radius: 10px; padding: 1px 7px; font-size: 11px; margin-left: auto; }

.sidebar-foot {
  padding: 12px 16px;
  font-size: 10.5px;
  color: #4b5563;
  border-top: 1px solid rgba(255,255,255,0.08);
}

/* ---------- Main ---------- */
.main { flex: 1; display: flex; flex-direction: column; }
.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.crumb { font-size: 11px; color: var(--text-dim); }
.crumb span { color: var(--sidebar-active); }
.topbar h1 { font-size: 20px; margin-top: 2px; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.role-pill {
  background: var(--hover);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--text);
}
.icon-btn {
  width: 34px; height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-dim);
}
.icon-btn:hover { background: var(--hover); }

#content { padding: 24px; flex: 1; }

/* ---------- Cards / panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.panel h3 { font-size: 15px; margin-bottom: 16px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 .stat:nth-child(n+3) { grid-column: span 1; }

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.stat-card .label { font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
.stat-card .value { font-size: 26px; font-weight: 700; color: var(--text); }

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--hover); font-weight: 600; font-size: 12px; color: var(--text-dim); }
tr:hover td { background: #fafbfc; }

/* ---------- Forms ---------- */
.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 12.5px; margin-bottom: 6px; font-weight: 500; color: var(--text); }
input, select, textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13.5px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--sidebar-active); }
textarea { resize: vertical; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
  background: var(--sidebar-active);
  color: #fff;
}
.btn:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary { background: var(--hover); color: var(--text); border-color: var(--border); }
.btn-green { background: var(--green); color: #fff; }
.btn-red { background: var(--red); color: #fff; }
.btn-amber { background: var(--amber); color: #fff; }
.btn-sm { padding: 6px 11px; font-size: 12px; }
.btn-block { width: 100%; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 600;
}
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-issued { background: #dcfce7; color: #166534; }
.badge-rejected { background: #fee2e2; color: #991b1b; }
.badge-receive { background: #dcfce7; color: #166534; }
.badge-issue { background: #fee2e2; color: #991b1b; }
.badge-adjust { background: #e0e7ff; color: #3730a3; }
.badge-low { background: #fee2e2; color: #991b1b; }
.badge-ok { background: #dcfce7; color: #166534; }

/* ---------- Misc ---------- */
.hidden { display: none !important; }
.empty { text-align: center; padding: 40px 20px; color: var(--text-dim); }
.empty .big { font-size: 36px; display: block; margin-bottom: 10px; }
.muted { color: var(--text-dim); }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.flex { display: flex; }
.between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.right { text-align: right; }
.actions { display: flex; gap: 8px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #111827;
  color: #fff;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s;
  z-index: 1000;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--red); }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; }
  #nav { flex-direction: row; flex-wrap: wrap; }
  .nav-item { width: auto; }
  .topbar { flex-direction: column; align-items: flex-start; }
}