:root {
  --ink: #14202E; --muted: #4A5868; --line: #DDE3EA; --line2: #C5CDD8; --bg: #F4F6F9;
  --blue: #0B5CAD; --blue-dark: #084684; --blue-soft: #EEF4FB;
  --green-bg: #E3F4EC; --green-fg: #0B5A3C; --grey-bg: #E4E7EB; --grey-fg: #2E3946;
  --warn-bg: #FDE7CF; --warn-fg: #5A2C00; --red-fg: #9B1C1C; --red-bg: #FDECEC;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.45 Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Khmer", sans-serif; }
a { color: var(--blue); } a:hover { color: var(--blue-dark); }
h1 { margin: 0; font-size: 24px; } h2 { margin: 0; font-size: 18px; }
.boot { padding: 40px; color: var(--muted); }
.muted { color: var(--muted); font-size: 14px; }
.small { font-size: 13px; }

/* Forms */
label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.field { display: flex; flex-direction: column; }
input[type=text], input[type=password], input[type=tel], select {
  height: 46px; border: 1px solid var(--line2); border-radius: 10px; padding: 0 12px; font: inherit; font-size: 16px; background: #fff; color: var(--ink); width: 100%;
}
input:focus, select:focus, button:focus-visible, a:focus-visible { outline: 3px solid #9CC3EE; outline-offset: 1px; }
button { font: inherit; cursor: pointer; }
.btn { height: 46px; padding: 0 16px; border-radius: 10px; border: 1px solid var(--line2); background: #fff; color: var(--ink); font-weight: 600; white-space: nowrap; }
.btn:hover { background: #F7F9FB; }
.btn-primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); }
.btn-small { height: 38px; padding: 0 12px; font-size: 14px; border-radius: 8px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.error { background: var(--red-bg); color: var(--red-fg); border-radius: 10px; padding: 10px 12px; font-size: 14px; font-weight: 600; }
.ok { background: var(--green-bg); color: var(--green-fg); border-radius: 10px; padding: 10px 12px; font-size: 14px; font-weight: 600; }

/* Login / password pages (phone first) */
.auth { min-height: 100vh; display: flex; flex-direction: column; align-items: center; padding: 24px; }
.auth-inner { width: 100%; max-width: 400px; display: flex; flex-direction: column; gap: 20px; margin-top: 6vh; }
.logo { width: 64px; height: 64px; border-radius: 16px; background: var(--blue); display: flex; align-items: center; justify-content: center; margin: 0 auto; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.center { text-align: center; }

/* App shell */
.banner { background: var(--warn-bg); color: var(--warn-fg); padding: 10px 20px; display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; font-weight: 600; }
.banner .btn { border-color: var(--warn-fg); color: var(--warn-fg); height: 40px; }
.shell { display: flex; flex-wrap: wrap; min-height: 100vh; }
.side { flex: 1 1 220px; max-width: 260px; min-width: 200px; background: var(--ink); color: #fff; padding: 20px 14px; display: flex; flex-direction: column; gap: 4px; }
.side .brand { font-size: 18px; font-weight: 700; padding: 6px 10px 2px; }
.side .who { font-size: 12px; color: #B8C4D2; padding: 0 10px 16px; }
.side a { display: flex; justify-content: space-between; align-items: center; padding: 12px 10px; border-radius: 8px; text-decoration: none; color: #fff; font-weight: 500; }
.side a.on { background: rgba(255,255,255,.14); font-weight: 600; }
.side a .soon { font-size: 11px; color: #B8C4D2; font-weight: 500; }
.side .spacer { flex: 1; min-height: 20px; }
.side button.linkish { background: none; border: none; color: #fff; text-align: left; padding: 12px 10px; border-radius: 8px; font-weight: 500; }
.side button.linkish:hover, .side a:hover { background: rgba(255,255,255,.08); }
.main { flex: 999 1 560px; min-width: 0; padding: 20px 28px; display: flex; flex-direction: column; gap: 20px; }
.topbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; justify-content: space-between; }
.topbar .viewas { display: flex; flex-wrap: wrap; gap: 8px; align-items: flex-end; }
.topbar .viewas .field { min-width: 160px; }
.title-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 12px; }
.cols { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-start; }
.col-wide { flex: 999 1 460px; min-width: 0; }
.col-side { flex: 1 1 300px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.panel-pad { padding: 18px 20px; display: flex; flex-direction: column; gap: 14px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
th { text-align: left; color: var(--muted); font-size: 12px; font-weight: 600; padding: 12px 10px; text-transform: uppercase; }
td { padding: 12px 10px; border-top: 1px solid #E6EAF0; vertical-align: middle; }
td.actions { text-align: right; white-space: nowrap; }
td.actions .btn + .btn { margin-left: 6px; }
.badge { font-size: 12px; font-weight: 600; padding: 4px 8px; border-radius: 999px; display: inline-block; }
.badge-on { background: var(--green-bg); color: var(--green-fg); }
.badge-off { background: var(--grey-bg); color: var(--grey-fg); }

/* Customers */
.cust-list button { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; width: 100%; text-align: left; padding: 14px 18px; border: none; border-top: 1px solid #E6EAF0; background: #fff; color: var(--ink); min-height: 60px; }
.cust-list button:first-child { border-top: none; border-radius: 14px 14px 0 0; }
.cust-list button.on { background: var(--blue-soft); }
.cust-list button .n { font-weight: 600; font-size: 16px; }
.seg { display: flex; flex-wrap: wrap; gap: 8px; }
.seg .btn.on { background: var(--blue); border-color: var(--blue); color: #fff; }
.feat { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; border-top: 1px solid #E6EAF0; }
.switch { flex: none; width: 56px; height: 32px; border-radius: 16px; border: none; padding: 3px; display: flex; background: #9AA6B4; justify-content: flex-start; }
.switch[aria-checked=true] { background: var(--blue); justify-content: flex-end; }
.switch span { width: 26px; height: 26px; border-radius: 50%; background: #fff; display: block; }

/* Dialog */
.overlay { position: fixed; inset: 0; background: rgba(20,32,46,.45); display: flex; align-items: center; justify-content: center; padding: 20px; z-index: 10; }
.dialog { background: #fff; border-radius: 14px; padding: 22px; max-width: 420px; width: 100%; display: flex; flex-direction: column; gap: 14px; }
.temp { font: 600 22px/1.3 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--bg); border-radius: 10px; padding: 14px; text-align: center; word-break: break-all; }
.row { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }

@media (max-width: 640px) {
  .main { padding: 16px; }
  .side { max-width: none; flex-basis: 100%; }
}