:root {
  --bg: #0b1022;
  --panel: rgba(19, 27, 53, 0.9);
  --panel-soft: rgba(28, 37, 71, 0.8);
  --text: #ecf1ff;
  --muted: #a3b0d9;
  --accent: #5b7cff;
  --accent-2: #25c7a8;
  --border: rgba(145, 170, 255, 0.3);
  --danger: #ff6b78;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 10% 0%, #283f96 0%, #111938 40%, #090d1d 100%);
  min-height: 100vh;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(9, 13, 29, 0.7);
  backdrop-filter: blur(8px);
}

.topbar h1 {
  font-size: 28px;
}

.topbar p {
  margin-top: 4px;
  color: var(--muted);
}

.top-actions {
  display: flex;
  gap: 14px;
  align-items: center;
}

.layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 18px;
  padding: 18px;
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 16px;
  padding: 16px;
}

.panel h2 {
  margin-bottom: 12px;
}

.panel h3 {
  margin: 14px 0 8px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.product-btn {
  border: 1px solid var(--border);
  background: var(--panel-soft);
  border-radius: 12px;
  color: var(--text);
  padding: 10px;
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.product-btn:hover {
  transform: translateY(-2px);
}

.product-btn.active {
  border-color: var(--accent-2);
  box-shadow: inset 0 0 0 1px var(--accent-2);
}

.product-btn img {
  width: 100%;
  height: 72px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 8px;
}

.product-btn strong,
.product-btn small {
  display: block;
}

.product-btn small {
  color: var(--muted);
  margin-top: 4px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(10, 15, 33, 0.9);
  color: var(--text);
  padding: 10px;
}

input:read-only {
  opacity: 0.88;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(41, 53, 102, 0.9);
  border-radius: 10px;
  padding: 10px 14px;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(120deg, #4f6fff, #6f8bff);
  border-color: #7b96ff;
}

.btn-success {
  background: linear-gradient(120deg, #11b798, #1fd0af);
  border-color: #2dd8b8;
}

.btn-small {
  padding: 6px 10px;
  font-size: 12px;
}

.table-wrap {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 10px;
  border-bottom: 1px solid rgba(145, 170, 255, 0.2);
  text-align: left;
  font-size: 13px;
}

th {
  background: rgba(14, 21, 45, 0.95);
}

.muted {
  color: var(--muted);
}

.totals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0;
}

.totals p,
.report-lines p {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(14, 21, 45, 0.8);
}

.report-lines {
  display: grid;
  gap: 8px;
}

.auth-page {
  display: grid;
  place-items: center;
}

.auth-wrap {
  width: min(420px, 92vw);
}

.auth-box {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 16px;
  padding: 24px;
}

.auth-box h1 {
  font-size: 32px;
}

.auth-box .form-grid {
  grid-template-columns: 1fr;
  margin-top: 14px;
}

.error {
  margin-top: 12px;
  color: var(--danger);
}

.hint {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.receipt {
  width: 80mm;
  margin: 16px auto;
  color: #000;
  background: #fff;
  border: 1px solid #ddd;
  padding: 10px;
  font-family: monospace;
  font-size: 12px;
}

.receipt h1,
.receipt p {
  text-align: center;
}

.receipt table {
  margin-top: 8px;
}

.receipt th,
.receipt td {
  border-bottom: 1px dashed #bbb;
  color: #000;
  padding: 4px 2px;
}

.receipt .grand {
  font-size: 14px;
  font-weight: 700;
}

.receipt .center {
  margin-top: 4px;
}

.print-page {
  background: #eef1f7;
}

.print-actions {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
}

@media (max-width: 1000px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .form-grid,
  .totals {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 700px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .product-grid,
  .form-grid,
  .totals {
    grid-template-columns: 1fr;
  }
}

@media print {
  body,
  .print-page {
    margin: 0;
    background: #fff;
  }

  .receipt {
    margin: 0;
    border: none;
    width: 80mm;
  }

  .no-print {
    display: none !important;
  }
}