:root {
  --bg: #020617;
  --panel: rgba(255,255,255,.08);
  --panel-2: rgba(255,255,255,.12);
  --border: rgba(255,255,255,.15);
  --text: #f8fafc;
  --muted: #94a3b8;
  --blue: #38bdf8;
  --blue-2: #0ea5e9;
  --green: #22c55e;
  --yellow: #facc15;
  --orange: #fb923c;
  --red: #ef4444;
  --shadow: 0 22px 70px rgba(0,0,0,.42);
}

* {
  box-sizing: border-box;
}

html, body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, .22), transparent 32%),
    radial-gradient(circle at bottom right, rgba(37, 99, 235, .20), transparent 35%),
    linear-gradient(135deg, #020617, #0f172a 55%, #111827);
  color: var(--text);
  font-family: Arial, sans-serif;
}

button, input, select, textarea {
  font-family: inherit;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 22px;
  background: rgba(2, 6, 23, .82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 46px;
  height: 46px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--blue), #2563eb);
  color: #020617;
  font-size: 25px;
  font-weight: 900;
  box-shadow: 0 12px 30px rgba(56,189,248,.25);
}

.brand-title {
  font-size: 18px;
  font-weight: 900;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 12px;
}

.top-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.view {
  display: none;
  padding: 24px;
}

.view.active {
  display: block;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.center-card, .auth-card {
  width: 100%;
  max-width: 520px;
  margin: 40px auto;
  text-align: center;
}

.big-icon {
  width: 74px;
  height: 74px;
  border-radius: 24px;
  background: rgba(56,189,248,.14);
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
  font-size: 32px;
  border: 1px solid rgba(56,189,248,.35);
}

h1, h2, h3 {
  margin-top: 0;
}

h1 {
  font-size: 28px;
  line-height: 1.2;
  margin-bottom: 8px;
}

h2 {
  font-size: 20px;
}

p {
  color: #cbd5e1;
  line-height: 1.6;
}

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

.hidden {
  display: none !important;
}

.btn {
  border: none;
  border-radius: 14px;
  padding: 12px 16px;
  font-weight: 900;
  cursor: pointer;
  transition: .18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--blue);
  color: #020617;
}

.btn-primary:hover {
  background: var(--blue-2);
}

.btn-soft {
  background: rgba(255,255,255,.12);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-danger {
  background: rgba(239, 68, 68, .18);
  color: #fecaca;
  border: 1px solid rgba(239, 68, 68, .35);
}

.form {
  display: grid;
  gap: 12px;
  text-align: left;
}

.form label {
  font-size: 13px;
  color: #dbeafe;
  font-weight: 800;
}

.form input,
.form select,
.form textarea,
.search {
  width: 100%;
  background: rgba(15,23,42,.75);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 13px 14px;
  outline: none;
}

.form input:focus,
.form select:focus,
.form textarea:focus,
.search:focus {
  border-color: rgba(56,189,248,.7);
  box-shadow: 0 0 0 3px rgba(56,189,248,.12);
}

.grid-form {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-form .full {
  grid-column: 1 / -1;
}

.check {
  display: flex;
  gap: 10px;
  align-items: center;
}

.check input {
  width: auto;
}

.info-box, .alert-box {
  margin-top: 14px;
  padding: 14px;
  border-radius: 16px;
  text-align: left;
  line-height: 1.55;
}

.alert-box.success { background: rgba(34,197,94,.14); border: 1px solid rgba(34,197,94,.35); color: #bbf7d0; }
.alert-box.error { background: rgba(239,68,68,.14); border: 1px solid rgba(239,68,68,.35); color: #fecaca; }
.alert-box.warning { background: rgba(250,204,21,.14); border: 1px solid rgba(250,204,21,.35); color: #fef3c7; }
.alert-box.info, .info-box { background: rgba(56,189,248,.12); border: 1px solid rgba(56,189,248,.30); color: #bae6fd; }

.layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 18px;
  max-width: 1240px;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 88px;
  height: fit-content;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.nav-btn {
  width: 100%;
  border: 0;
  background: transparent;
  color: #cbd5e1;
  text-align: left;
  padding: 13px 14px;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 800;
}

.nav-btn:hover, .nav-btn.active {
  background: rgba(56,189,248,.14);
  color: #ffffff;
}

.content {
  min-width: 0;
}

.tab {
  display: none;
}

.tab.active {
  display: block;
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 18px;
}

.stat-card span {
  color: var(--muted);
  font-size: 13px;
}

.stat-card strong {
  display: block;
  margin-top: 8px;
  font-size: 32px;
}

.stat-card.urgent strong { color: var(--orange); }
.stat-card.danger strong { color: #fca5a5; }

.cards-list {
  display: grid;
  gap: 12px;
}

.item-card {
  background: rgba(15,23,42,.65);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
}

.item-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  background: rgba(56,189,248,.14);
  color: #bae6fd;
  border: 1px solid rgba(56,189,248,.25);
}

.badge.danger { background: rgba(239,68,68,.16); color: #fecaca; border-color: rgba(239,68,68,.35); }
.badge.warning { background: rgba(251,146,60,.16); color: #fed7aa; border-color: rgba(251,146,60,.35); }
.badge.success { background: rgba(34,197,94,.16); color: #bbf7d0; border-color: rgba(34,197,94,.35); }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  margin-top: 8px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.qr-box {
  display: inline-block;
  background: #fff;
  padding: 14px;
  border-radius: 18px;
  margin: 16px auto;
}

.loader {
  width: 42px;
  height: 42px;
  border: 4px solid rgba(255,255,255,.18);
  border-top-color: var(--blue);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: spin 1s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(2,6,23,.76);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 100;
}

.modal-box {
  width: 100%;
  max-width: 720px;
  max-height: 90vh;
  overflow: auto;
  background: #0f172a;
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 22px;
  box-shadow: var(--shadow);
  position: relative;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255,255,255,.12);
  border: 1px solid var(--border);
  color: #fff;
  border-radius: 12px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  font-size: 22px;
}

.file-input {
  border: 1px dashed rgba(56,189,248,.45);
  padding: 16px;
  border-radius: 16px;
  background: rgba(56,189,248,.08);
}

@media (max-width: 900px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    display: flex;
    overflow-x: auto;
    gap: 6px;
  }

  .nav-btn {
    min-width: max-content;
    text-align: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }

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

  .page-head {
    flex-direction: column;
  }

  .view {
    padding: 14px;
  }
}

@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 18px;
  }
}

.desktop-qr-small {
  margin-top: 18px;
}
.small-qr canvas,
.small-qr img {
  width: 160px !important;
  height: 160px !important;
}