:root {
  --bg: #1a202c;
  --bg-2: #2d3748;
  --bg-3: #4a5568;
  --fg: #f7fafc;
  --muted: #a0aec0;
  --accent: #3182ce;
  --green: #38a169;
  --red: #e53e3e;
  --amber: #d69e2e;
  --radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg); }
button { cursor: pointer; font: inherit; }

/* ---- Login ---- */
.login-body { display: grid; place-items: center; min-height: 100vh; background: var(--bg); }
.login-card { background: var(--bg-2); padding: 32px; border-radius: var(--radius); width: min(380px, 95vw); display: grid; gap: 12px; }
.login-card h1 { margin: 0 0 8px; text-align: center; letter-spacing: 4px; }
.login-card label { font-size: 12px; color: var(--muted); text-transform: uppercase; }
.login-card input, .login-card select { padding: 12px; border-radius: 6px; border: 1px solid var(--bg-3); background: var(--bg); color: var(--fg); font-size: 18px; }
.login-card button { padding: 14px; border: 0; border-radius: 6px; background: var(--accent); color: white; font-size: 16px; font-weight: 600; }
.err { color: var(--red); font-size: 14px; }

/* ---- Till ---- */
.till-body { display: grid; grid-template-rows: auto 1fr; height: 100vh; overflow: hidden; }
.till-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 16px; background: var(--bg-2); border-bottom: 1px solid var(--bg-3); }
.brand { font-weight: 700; letter-spacing: 1px; }
.till-header .status { display: flex; gap: 8px; align-items: center; font-size: 13px; color: var(--muted); }
.till-header .user { display: flex; gap: 16px; align-items: center; font-size: 13px; }
.till-header .user a { color: var(--muted); text-decoration: none; }
.till-header .user a:hover { color: var(--fg); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }
.dot.online  { background: var(--green); box-shadow: 0 0 6px var(--green); }
.dot.offline { background: var(--red); }

.till-main { display: grid; grid-template-columns: 1fr 360px; gap: 0; min-height: 0; }

.catalog { display: grid; grid-template-rows: auto 1fr; min-height: 0; }
.categories { display: flex; gap: 6px; padding: 8px; background: var(--bg-2); border-bottom: 1px solid var(--bg-3); overflow-x: auto; }
.cat { padding: 10px 16px; border: 0; border-radius: 6px; background: var(--bg-3); color: var(--fg); font-weight: 600; white-space: nowrap; }
.cat.active { outline: 2px solid var(--accent); }
.cat.all { background: var(--bg-2); border: 1px solid var(--bg-3); }
.products { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; padding: 10px; overflow-y: auto; align-content: start; }
.prod { padding: 14px 10px; border: 0; border-radius: var(--radius); background: var(--bg-3); color: var(--fg); display: grid; gap: 8px; min-height: 84px; text-align: left; }
.prod-name { font-weight: 600; line-height: 1.2; }
.prod-price { color: var(--muted); font-size: 14px; }
.prod:hover { background: #5a6677; }

.cart { background: var(--bg-2); border-left: 1px solid var(--bg-3); display: grid; grid-template-rows: auto 1fr auto auto auto; min-height: 0; }
.cart-header { display: flex; justify-content: space-between; padding: 12px 14px; border-bottom: 1px solid var(--bg-3); font-weight: 600; }
.cart-lines { list-style: none; margin: 0; padding: 0; overflow-y: auto; }
.cart-line { padding: 10px 14px; border-bottom: 1px solid var(--bg); }
.cart-line-main { display: flex; justify-content: space-between; gap: 8px; }
.line-name { flex: 1; }
.cart-line-ctrl { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.cart-line-ctrl button { padding: 2px 10px; border: 0; border-radius: 4px; background: var(--bg-3); color: var(--fg); }
.qty { min-width: 22px; text-align: center; }
.line-note { font-size: 12px; color: var(--muted); }
.totals { padding: 12px 14px; border-top: 1px solid var(--bg-3); display: grid; gap: 4px; font-size: 14px; }
.totals > div { display: flex; justify-content: space-between; }
.totals .total { font-size: 22px; font-weight: 700; margin-top: 4px; }
.cart-actions { padding: 10px 12px; display: grid; gap: 8px; }
.cart-actions.row { grid-template-columns: 1fr 1fr 1fr; }
.cart-actions button { padding: 14px; border: 0; border-radius: 6px; background: var(--bg-3); color: var(--fg); font-weight: 600; }
.cart-actions .big { padding: 18px; font-size: 16px; }
.cart-actions .primary { background: var(--green); }
.cart-actions .ghost { background: transparent; border: 1px solid var(--bg-3); color: var(--muted); }
.cart-actions button:disabled { opacity: 0.4; }

/* ---- Modals ---- */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: grid; place-items: center; z-index: 50; }
.modal.hidden { display: none; }
.modal-card { background: var(--bg-2); padding: 24px; border-radius: var(--radius); width: min(420px, 95vw); display: grid; gap: 12px; }
.modal-card h2 { margin: 0 0 6px; }
.modal-card input, .modal-card select, .modal-card textarea { padding: 10px; border-radius: 6px; border: 1px solid var(--bg-3); background: var(--bg); color: var(--fg); }
.big-total { font-size: 22px; color: var(--muted); }
.big-total strong { color: var(--fg); }
#tender-amount { font-size: 32px; padding: 14px; text-align: right; }
.quick-cash { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.quick-cash button { padding: 12px; border: 0; border-radius: 6px; background: var(--bg-3); color: var(--fg); }
.change { font-size: 18px; }
.change strong { color: var(--green); }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }
.modal-actions .primary { background: var(--green); color: white; padding: 12px 20px; border: 0; border-radius: 6px; }
.modal-actions .ghost { background: transparent; border: 1px solid var(--bg-3); color: var(--muted); padding: 12px 20px; border-radius: 6px; }
.mod-list { display: grid; gap: 8px; }
.mod-opt { display: flex; align-items: center; gap: 10px; padding: 10px; background: var(--bg); border-radius: 6px; }
.mod-opt input { width: auto; }
.mod-delta { margin-left: auto; color: var(--muted); }

#toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--green); color: white; padding: 14px 24px; border-radius: 8px; opacity: 0; transition: opacity 0.2s; z-index: 60; }
#toast.show { opacity: 1; }

/* ---- Admin / Reports ---- */
.admin-body, .report-body { background: var(--bg); color: var(--fg); margin: 0; min-height: 100vh; }
.admin-body header, .report-body header { display: flex; gap: 18px; align-items: center; padding: 12px 18px; background: var(--bg-2); border-bottom: 1px solid var(--bg-3); }
.admin-body header a, .report-body header a { color: var(--muted); text-decoration: none; }
.admin-body header a:hover, .report-body header a:hover { color: var(--fg); }
.admin-nav { display: flex; gap: 6px; padding: 12px 18px; background: var(--bg-2); border-bottom: 1px solid var(--bg-3); flex-wrap: wrap; }
.admin-nav button { padding: 8px 14px; border: 0; border-radius: 4px; background: var(--bg-3); color: var(--muted); }
.admin-nav button.active { background: var(--accent); color: white; }
.admin-body main, .report-main { padding: 20px; }
table.grid { width: 100%; border-collapse: collapse; background: var(--bg-2); }
table.grid th, table.grid td { padding: 8px; border-bottom: 1px solid var(--bg-3); text-align: left; }
table.grid input, table.grid select { width: 100%; padding: 6px; background: var(--bg); color: var(--fg); border: 1px solid var(--bg-3); border-radius: 4px; }
table.grid tr.low { background: rgba(229, 62, 62, 0.1); }
table.grid button { padding: 6px 10px; border: 0; border-radius: 4px; background: var(--bg-3); color: var(--fg); }
.primary { background: var(--accent) !important; color: white; }
.form { display: grid; gap: 12px; max-width: 480px; }
.form label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.form input, .form textarea { padding: 8px; background: var(--bg-2); color: var(--fg); border: 1px solid var(--bg-3); border-radius: 4px; }
.form textarea { min-height: 80px; }

.filters { display: flex; gap: 10px; align-items: end; margin-bottom: 16px; flex-wrap: wrap; }
.filters label { display: grid; gap: 4px; font-size: 12px; color: var(--muted); }
.filters input { padding: 6px; background: var(--bg-2); border: 1px solid var(--bg-3); color: var(--fg); border-radius: 4px; }
.filters button, .filters .btn { padding: 8px 14px; background: var(--accent); color: white; border: 0; border-radius: 4px; text-decoration: none; }
.report-summary { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; margin-bottom: 18px; }
.stat { background: var(--bg-2); padding: 12px; border-radius: 8px; display: grid; gap: 4px; }
.stat span { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.stat strong { font-size: 22px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 18px; }
.grid-2 table { width: 100%; background: var(--bg-2); }
.grid-2 td { padding: 6px 10px; border-bottom: 1px solid var(--bg-3); }