:root {
  --bg: #eef2fb;
  --surface: #ffffff;
  --surface-alt: #f4f7fd;
  --border: #e1e7f5;
  --border-strong: #c7d2e8;
  --text: #101828;
  --muted: #64748b;
  --muted-dim: #94a3b8;

  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-soft: #e8f0fe;
  --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);

  --sidebar-bg: #0f1c3d;
  --sidebar-bg-alt: #142752;
  --sidebar-text: #a9b8dd;
  --sidebar-text-active: #ffffff;
  --sidebar-border: rgba(255, 255, 255, 0.08);

  --success: #16a34a;
  --success-bg: #ecfdf3;
  --success-border: #bbf7d0;

  --warning: #b45309;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;

  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;

  --violet: #7c3aed;
  --violet-bg: #f5f3ff;
  --violet-border: #ddd6fe;

  --amber: #b45309;
  --amber-bg: #fff7ed;
  --amber-border: #fed7aa;

  --radius: 16px;
  --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 12px 32px rgba(16, 24, 40, 0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
}

/* ---------- Login Page ---------- */

.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    radial-gradient(circle at 15% 20%, rgba(255, 255, 255, 0.14), transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(255, 255, 255, 0.10), transparent 45%),
    linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 45%, #3b82f6 100%);
}

.login-wrapper {
  width: 100%;
  max-width: 400px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(15, 28, 61, 0.35);
  padding: 40px 36px;
}

.brand {
  text-align: center;
  margin-bottom: 28px;
}

.brand-icon {
  font-size: 40px;
  margin-bottom: 10px;
}

.brand-icon.small {
  font-size: 20px;
  margin: 0;
}

.brand h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}

.brand-sub {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

.login-form .field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.field input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
  background: var(--surface-alt);
  color: var(--text);
}

.field input::placeholder {
  color: var(--muted-dim);
}

.field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background: var(--surface);
}

.field input:disabled {
  color: var(--muted);
  background: var(--surface-alt);
  cursor: not-allowed;
}

.req { color: var(--danger); }

.field-hint {
  font-size: 12px;
  color: var(--muted);
  margin-top: -12px;
  margin-bottom: 18px;
}

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  font-size: 13px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--primary);
}

.forgot-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.forgot-link:hover { text-decoration: underline; }

.btn-primary {
  width: 100%;
  padding: 12px 16px;
  background: var(--primary-gradient);
  color: #ffffff;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-block;
  text-align: center;
  text-decoration: none;
  transition: box-shadow .15s, transform .05s, filter .15s;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.30);
}

.btn-primary:hover {
  filter: brightness(1.06);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.40);
}
.btn-primary:active { transform: scale(0.98); }

.hint {
  margin-top: 16px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

.hint strong { color: var(--primary); }

.error-msg {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger);
  font-size: 13px;
  padding: 9px 12px;
  border-radius: 8px;
  margin-bottom: 16px;
}

/* ---------- Dashboard shell ---------- */

.dash-body {
  min-height: 100vh;
  background: var(--bg);
}

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

/* ---------- Sidebar ---------- */

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--sidebar-bg) 0%, var(--sidebar-bg-alt) 100%);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 20;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: #ffffff;
  padding: 20px 22px;
  border-bottom: 1px solid var(--sidebar-border);
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 10px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background .15s, color .15s, border-color .15s;
}

.nav-icon { font-size: 16px; }

.nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
}

.nav-item.active {
  background: rgba(59, 130, 246, 0.20);
  border-color: rgba(96, 165, 250, 0.35);
  color: #ffffff;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.user-chip {
  font-size: 13px;
  color: var(--sidebar-text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--sidebar-border);
  padding: 8px 12px;
  border-radius: 10px;
  text-align: center;
}

.btn-logout {
  padding: 9px 16px;
  border: 1px solid var(--sidebar-border);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: #e2e8f7;
  transition: background .15s, border-color .15s, color .15s;
}

.btn-logout:hover { background: rgba(248, 113, 113, 0.18); border-color: rgba(248, 113, 113, 0.4); color: #fecaca; }

/* ---------- Main area / topbar ---------- */

.main-area {
  flex: 1;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.menu-toggle {
  display: none;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  font-size: 16px;
  cursor: pointer;
}

.topbar-search {
  flex: 1;
  display: flex;
  gap: 10px;
  max-width: 480px;
}

.topbar-search input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-alt);
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}

.topbar-search input::placeholder { color: var(--muted-dim); }

.topbar-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background: var(--surface);
}

.btn-search {
  padding: 10px 16px;
  border: none;
  background: var(--primary-gradient);
  border-radius: 10px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  color: #ffffff;
  white-space: nowrap;
  transition: filter .15s;
}

.btn-search:hover { filter: brightness(1.08); }

.dash-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 24px 60px;
}

.view-head { margin-bottom: 20px; }
.view-head h2 { font-size: 20px; margin-bottom: 4px; }

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-sm);
}

.stat-icon {
  font-size: 22px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--primary-soft);
}

.stat-icon.c-blue { background: var(--primary-soft); }
.stat-icon.c-violet { background: var(--violet-bg); }
.stat-icon.c-amber { background: var(--amber-bg); }
.stat-icon.c-green { background: var(--success-bg); }

.stat-value {
  font-size: 23px;
  font-weight: 700;
}

.stat-label {
  font-size: 12px;
  color: var(--muted);
}

.toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 20px;
}

.toolbar h2 { font-size: 19px; }

.muted {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

.btn-add {
  width: auto;
  padding: 11px 20px;
  white-space: nowrap;
}

.btn-danger {
  padding: 11px 18px;
  border: 1px solid var(--danger-border);
  background: var(--danger-bg);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: var(--danger);
  transition: background .15s, border-color .15s;
}

.btn-danger:hover { background: #fee2e2; border-color: #fca5a5; }

/* ---------- Panels (overview lists / forms) ---------- */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.panel-head h3 { font-size: 16px; }

.link-more {
  font-size: 13px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}

.link-more:hover { text-decoration: underline; }

.form-panel { max-width: 480px; }
.form-panel .field { margin-bottom: 18px; }

/* ---------- Rack row (overview lists) ---------- */

.rack-row-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rack-row {
  display: grid;
  grid-template-columns: 1fr 140px auto;
  align-items: center;
  gap: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary-light);
  background: var(--surface-alt);
  text-decoration: none;
  color: var(--text);
  transition: background .15s, border-color .15s;
}

.rack-row:hover { background: var(--primary-soft); border-color: var(--border-strong); }

.rack-row-main {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.rack-row-name { font-weight: 700; font-size: 14px; }

.rack-row-loc {
  font-size: 12px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rack-row-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}

/* ---------- Filters bar ---------- */

.filters-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.filters-bar input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  outline: none;
}

.filters-bar input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.filters-bar select {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  outline: none;
  cursor: pointer;
}

.filters-bar .btn-secondary {
  padding: 10px 16px;
}

/* ---------- Rack grid / cards ---------- */

.rack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.rack-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform .15s, box-shadow .15s, border-color .15s;
}

.rack-card.clickable { cursor: pointer; }

.rack-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}

.rack-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4px;
}

.rack-id-badge {
  display: inline-block;
  font-family: "Consolas", "SFMono-Regular", monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .03em;
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--primary-soft);
  border: 1px solid #cfe0fd;
  color: var(--primary-dark);
  margin-bottom: 6px;
}

.rack-id-badge.large {
  font-size: 12px;
  padding: 4px 10px;
  margin-left: 8px;
  vertical-align: middle;
}

.rack-name {
  font-size: 16px;
  font-weight: 700;
}

.rack-location {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

.rack-sub-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.rack-category-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid;
}

.rack-layout {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- Item chips (rack card preview) ---------- */

.rack-items-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.rack-item-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 20px;
  border: 1px solid;
  max-width: 100%;
}

.rack-item-chip .qty {
  color: inherit;
  opacity: .7;
  font-weight: 700;
}

.rack-item-chip.more {
  color: var(--muted);
  background: transparent;
  border-style: dashed;
}

.rack-card-actions {
  display: flex;
  gap: 6px;
}

.icon-btn {
  border: 1px solid var(--border);
  background: var(--surface-alt);
  width: 28px;
  height: 28px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s, border-color .15s;
}

.icon-btn:hover { background: var(--primary-soft); border-color: #bcd3fb; }
.icon-btn.delete:hover { background: var(--danger-bg); border-color: var(--danger-border); }

.rack-progress-track {
  width: 100%;
  height: 8px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 10px;
}

.rack-progress-track.small {
  height: 6px;
  width: 120px;
  margin-bottom: 0;
}

.rack-progress-track.large {
  height: 12px;
  margin-bottom: 28px;
}

.rack-progress-fill {
  height: 100%;
  border-radius: 6px;
  background: linear-gradient(90deg, #22c55e, #16a34a);
  transition: width .2s;
}

.rack-progress-fill.warning {
  background: linear-gradient(90deg, #f59e0b, #d97706);
}
.rack-progress-fill.full {
  background: linear-gradient(90deg, #ef4444, #dc2626);
}

.rack-meta {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}

.rack-meta strong { color: var(--text); }

.rack-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--success);
}

.rack-badge.warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--warning);
}
.rack-badge.full {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
}

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
  font-size: 14px;
}

/* ---------- Rack detail ---------- */

.back-link {
  display: inline-block;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 18px;
  font-weight: 600;
}

.back-link:hover { color: var(--primary); }

.detail-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.detail-title-row h2 { font-size: 22px; }

.detail-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.items-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-alt);
}

.item-info {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.item-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.item-name {
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.item-qty {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.item-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

/* ---------- Slot grid (rack layout) ---------- */

.slot-grid-wrap {
  max-height: 320px;
  overflow-y: auto;
  padding: 4px;
}

.slot-grid {
  display: grid;
  gap: 5px;
}

.slot-cell {
  aspect-ratio: 1 / 1;
  min-width: 14px;
  border-radius: 4px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
}

.slot-cell.filled {
  background: var(--primary-gradient);
  border-color: transparent;
}

/* ---------- Modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(9, 14, 30, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-overlay[hidden] {
  display: none;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-md);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 17px; }

.modal-close {
  border: none;
  background: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--muted);
}

.modal-close:hover { color: var(--text); }

.modal-form { padding: 22px 24px; }
.modal-form .field { margin-bottom: 18px; }

.field-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}

.btn-secondary {
  padding: 11px 18px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text);
  transition: background .15s;
}

.btn-secondary:hover { background: var(--surface-alt); }

.modal-actions .btn-primary { width: auto; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }

  .menu-toggle { display: block; }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform .2s ease;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.25);
  }

  .sidebar.open { transform: translateX(0); }
}

@media (max-width: 700px) {
  .rack-row { grid-template-columns: 1fr; align-items: flex-start; gap: 8px; }
  .rack-row-progress { width: 100%; }
  .rack-progress-track.small { width: 100%; }
  .rack-row-meta { justify-content: space-between; width: 100%; }
}

@media (max-width: 560px) {
  .stats-row { grid-template-columns: 1fr; }
  .toolbar { flex-direction: column; align-items: flex-start; gap: 14px; }
  .btn-add { width: 100%; }
  .field-group { grid-template-columns: 1fr; }
  .topbar { padding: 12px 16px; }
  .dash-main { padding: 20px 16px 40px; }
  .filters-bar { flex-wrap: wrap; }
  .filters-bar input { min-width: 100%; }
  .detail-title-row { flex-direction: column; }
  .detail-actions { width: 100%; }
  .detail-actions button { flex: 1; }
}