:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #1f2733;
  --muted: #6b7280;
  --primary: #6d28d9;
  --primary-dark: #5b21b6;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
}
body {
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
}
.hidden {
  display: none !important;
}
.muted {
  color: var(--muted);
  font-size: 12px;
}
.error {
  color: var(--danger);
  min-height: 18px;
}

/* Login */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}
.login-card {
  background: var(--panel);
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  width: 340px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.login-card h1 {
  margin: 0;
  color: var(--primary);
}
.login-card label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
}

/* App layout */
.app {
  display: grid;
  grid-template-columns: 230px 1fr;
  height: 100vh;
}
.sidebar {
  background: #1e1b2e;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
}
.brand {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  padding: 18px 20px;
}
.nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}
.nav button {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: #cbd5e1;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}
.nav button:hover {
  background: rgba(255, 255, 255, 0.06);
}
.nav button.active {
  background: var(--primary);
  color: #fff;
}
.sidebar-footer {
  padding: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.content {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar h2 {
  margin: 0;
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  color: var(--ink);
  padding: 4px 8px;
  margin-right: 4px;
}
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 15;
}
.view {
  padding: 24px;
}

/* Buttons */
.btn {
  background: #eef0f3;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--ink);
}
.btn:hover {
  background: #e2e5ea;
}
.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn.primary:hover {
  background: var(--primary-dark);
}
.btn.small {
  padding: 5px 10px;
  font-size: 12px;
}
.btn.danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}
.btn.success {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}

/* Cards & grid */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.card .label {
  color: var(--muted);
  font-size: 12px;
}
.card .value {
  font-size: 22px;
  font-weight: 700;
  margin-top: 4px;
}

/* Tables */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 16px;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th,
td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
th {
  background: #fafafa;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
}
tr:hover td {
  background: #fafafd;
}
.right {
  text-align: right;
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.form-grid.one {
  grid-template-columns: 1fr;
}
label.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
}
input,
select,
textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  background: #fff;
}
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--primary);
  border-color: var(--primary);
}
.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 4px;
  flex-wrap: wrap;
}
.toolbar input[type="search"] {
  min-width: 240px;
}
.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
}

/* Badges */
.badge {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}
.badge.ok {
  background: #dcfce7;
  color: var(--success);
}
.badge.warn {
  background: #fef3c7;
  color: var(--warn);
}
.badge.bad {
  background: #fee2e2;
  color: var(--danger);
}
.badge.info {
  background: #ede9fe;
  color: var(--primary);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
  z-index: 50;
  overflow-y: auto;
}
.modal {
  background: var(--panel);
  border-radius: 12px;
  width: 100%;
  max-width: 720px;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 {
  margin: 0;
}
.modal-body {
  padding: 20px;
}

/* Items editor */
.items-editor .item-row {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 8px;
  margin-bottom: 8px;
  align-items: end;
}
.items-editor .item-row > * {
  min-width: 0;
}
.items-editor .item-row select,
.items-editor .item-row input {
  width: 100%;
  box-sizing: border-box;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--ink);
  color: #fff;
  padding: 12px 18px;
  border-radius: 8px;
  z-index: 100;
}
.toast.ok {
  background: var(--success);
}
.toast.err {
  background: var(--danger);
}

@media (max-width: 780px) {
  .app {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 20;
    width: 250px;
    max-width: 80%;
    height: 100%;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 2px 0 16px rgba(0, 0, 0, 0.25);
  }
  .app.nav-open .sidebar {
    transform: translateX(0);
  }
  .app.nav-open .sidebar-backdrop {
    display: block;
  }
  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }
  .topbar {
    padding: 12px 16px;
    gap: 8px;
  }
  .topbar h2 {
    font-size: 18px;
    flex: 1;
  }
  #topbar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
  }
  .view {
    padding: 16px 12px;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .cards {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
  /* Tabele: horizontalni scroll umjesto prelivanja */
  .panel {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  table {
    min-width: 560px;
  }
  .toolbar {
    gap: 8px;
  }
  .toolbar input[type="search"] {
    min-width: 0;
    width: 100%;
    flex: 1 1 100%;
  }
  .modal {
    max-width: 100%;
  }
  .modal-overlay {
    padding: 16px 8px;
  }
}

/* Print */
@media print {
  .sidebar,
  .topbar,
  #topbar-actions,
  .toolbar {
    display: none !important;
  }
  .app {
    display: block;
  }
  .view {
    padding: 0;
  }
  .panel {
    border: none;
  }
}