:root {
  --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-border: #e0e0e0;
  --color-text: #212121;
  --color-text-secondary: #757575;
  --color-primary: #1976d2;
  --color-primary-hover: #1565c0;
  --color-primary-light: #e3f2fd;
  --color-success: #2e7d32;
  --color-success-light: #e8f5e9;
  --color-error: #d32f2f;
  --color-error-light: #ffebee;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.12);

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  --transition: 0.2s ease;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header h1 { font-size: 18px; margin: 0; font-weight: 500; }

main { max-width: 720px; margin: 0 auto; padding: 20px; }
#screen-scan { max-width: none; }

.scan-layout { display: block; }
.scan-panel { max-width: 720px; margin: 0 auto; }
.items-table-panel { display: none; }

@media (min-width: 900px) {
  body.scan-mode main { max-width: 1100px; }
  .scan-layout { display: flex; align-items: flex-start; gap: 24px; }
  .scan-panel { flex: 0 0 420px; max-width: 420px; margin: 0; }
  .items-table-panel {
    display: block; flex: 1; min-width: 0;
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 4px 12px; max-height: 80vh; overflow-y: auto;
  }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-md);
  margin-bottom: 14px;
}

.upload-box { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.upload-box input[type=file] { color: var(--color-text-secondary); flex: 1; min-width: 200px; }

/* --- кнопки (как в «Управлении поставками») --- */
button {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
  border: none; border-radius: var(--radius-sm); font-weight: 500; font-family: inherit;
  cursor: pointer; transition: background var(--transition), opacity var(--transition);
  white-space: nowrap; font-size: var(--font-size-base, 1rem); padding: var(--space-sm) var(--space-md);
}
button:disabled { opacity: .5; cursor: not-allowed; }

button.primary { background: var(--color-primary); color: #fff; padding: 10px 18px; font-weight: 500; }
button.primary:hover:not(:disabled) { background: var(--color-primary-hover); }

button.secondary { background: var(--color-bg); color: var(--color-text); border: 1px solid var(--color-border); padding: 10px 16px; }
button.secondary:hover:not(:disabled) { background: var(--color-border); }

button.danger { background: var(--color-error); color: #fff; padding: 10px 16px; }
button.danger:hover:not(:disabled) { background: #b71c1c; }

header button { background: var(--color-surface); color: var(--color-text-secondary); border: 1px solid var(--color-border); padding: 8px 14px; }
header button:hover { background: var(--color-bg); }

.batch-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.batch-row .meta { color: var(--color-text-secondary); font-size: 13px; }
.progress-bar { height: 6px; background: var(--color-bg); border-radius: 3px; overflow: hidden; margin-top: 8px; }
.progress-bar > div { height: 100%; background: var(--color-primary); }

.section-title { color: var(--color-text-secondary); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; margin: 24px 0 8px; }

/* --- scan screen --- */
.progress-counter { text-align: center; font-size: 15px; color: var(--color-text-secondary); margin-bottom: 16px; }
.progress-counter b { color: var(--color-text); font-size: 20px; }

.item-info { background: var(--color-primary-light); border-radius: var(--radius-md); padding: 14px 16px; margin-bottom: 16px; font-size: 14px; }
.item-info .empty { color: var(--color-text-secondary); }

/* --- крупная плашка артикул/размер (промежуточный контроль перед сканом ЧЗ) --- */
.plate-name { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 8px; }
.plate-main { display: flex; gap: 20px; flex-wrap: wrap; }
.plate-field { display: flex; flex-direction: column; }
.plate-label { font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--color-text-secondary); margin-bottom: 2px; }
.plate-value { font-size: 28px; font-weight: 700; color: var(--color-primary); line-height: 1.1; }
.plate-sub { margin-top: 8px; font-size: 12px; color: var(--color-text-secondary); }

.scan-field { margin-bottom: 14px; }
.scan-field label { display: flex; justify-content: space-between; font-size: 13px; color: var(--color-text-secondary); margin-bottom: 6px; }
.scan-field .status { font-weight: 600; }
.scan-field .status.ok { color: var(--color-success); }
.scan-field input {
  width: 100%; padding: 16px 14px; font-size: 20px; border-radius: var(--radius-md);
  border: 2px solid var(--color-border); background: var(--color-surface); color: var(--color-text);
  font-family: monospace;
}
.scan-field.active input { border-color: var(--color-primary); background: var(--color-primary-light); }
.scan-field.done input { border-color: var(--color-success); opacity: .6; }
.scan-field.disabled input { opacity: .4; }

.error-banner {
  background: var(--color-error-light); color: var(--color-error); border: 1px solid var(--color-error);
  padding: 12px 14px; border-radius: var(--radius-md);
  margin-bottom: 14px; font-weight: 600; display: none;
}
.error-banner.show { display: block; }

.camera-toggle { display: flex; justify-content: center; margin: 10px 0 20px; }

/* --- таблица позиций партии (десктоп) --- */
.items-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.items-table th, .items-table td {
  padding: 8px 10px; border-bottom: 1px solid var(--color-border);
  text-align: left; white-space: nowrap;
}
.items-table th {
  color: var(--color-text-secondary); font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: .04em;
  position: sticky; top: 0; background: var(--color-surface);
}
.items-table td.num { color: var(--color-text-secondary); }
.items-table td.article { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.items-table td.kiz { font-family: monospace; font-size: 11px; max-width: 160px; overflow: hidden; text-overflow: ellipsis; }
.items-table tr.row-done td { color: var(--color-success); }
.items-table tr.row-active td { background: var(--color-primary-light); }

.actions { display: flex; gap: 10px; margin-top: 20px; }
.actions button { flex: 1; }

.hidden { display: none !important; }

/* --- экран входа --- */
.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box {
  background: var(--color-surface); padding: 40px; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md); width: 340px; max-width: 90vw; text-align: center;
}
.login-box h2 { margin: 0 0 24px; font-size: 1.1rem; font-weight: 500; }
.login-box select, .login-box input {
  width: 100%; padding: 10px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-size: 14px; margin-bottom: 12px; background: #fff; font-family: inherit; color: var(--color-text);
}
.login-box select { cursor: pointer; }
.login-box button { width: 100%; margin-top: 4px; }
.login-box .error {
  color: var(--color-error); font-size: 13px; margin-bottom: 8px; display: none;
  background: var(--color-error-light); border-radius: var(--radius-sm); padding: 8px;
}
.login-box .error.show { display: block; }

/* --- камера-сканер (модальное окно) --- */
.barcode-scanner-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,.75); z-index: 1000;
  display: flex; align-items: center; justify-content: center;
}
.barcode-scanner-container {
  background: var(--color-surface); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden; width: 90vw; max-width: 420px;
}
.barcode-scanner-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; font-weight: 500; font-size: 15px;
  border-bottom: 1px solid var(--color-border);
}
.scanner-torch-btn, .scanner-close-btn {
  width: 36px; height: 36px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  background: var(--color-bg); color: var(--color-text); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.scanner-torch-btn:active, .scanner-close-btn:active { background: var(--color-border); }

.barcode-scanner-video { width: 100%; min-height: 280px; display: block; background: #000; }

.scanner-info { padding: 12px; background: var(--color-primary-light); color: var(--color-text); font-size: 13px; }
.scanner-info .plate-value { font-size: 24px; }

.scanner-flash {
  position: absolute; inset: 0; pointer-events: none;
  animation: flashFade .4s ease-out forwards;
}
.scanner-flash.success { background: rgba(46, 125, 50, .35); }
.scanner-flash.error { background: rgba(211, 47, 47, .35); }
@keyframes flashFade { 0% { opacity: 1; } 100% { opacity: 0; } }

.barcode-scanner-error { padding: 8px 16px; color: var(--color-error); font-size: 13px; }

.scanner-message { padding: 10px 16px; text-align: center; font-size: 13px; font-weight: 600; }
.scanner-message.success { background: var(--color-success-light); color: var(--color-success); }
.scanner-message.error { background: var(--color-error-light); color: var(--color-error); }

.barcode-scanner-hint { text-align: center; padding: 8px 16px 16px; color: var(--color-text-secondary); font-size: 13px; margin: 0; }