:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --dark: #111827;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --radius: 18px;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

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

.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.16), transparent 34%),
    #f5f6f8;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: white;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 34px;
  border: 1px solid var(--border);
}

.login-logo {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: var(--primary);
  color: white;
  display: grid;
  place-items: center;
  font-weight: 800;
}

.login-card h1 {
  margin: 18px 0 4px;
  font-size: 30px;
}

.login-card p {
  margin: 0 0 24px;
  color: var(--muted);
}

.form {
  display: grid;
  gap: 18px;
}

.form label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

.form input,
.form select,
.form textarea {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  background: white;
}

.primary-btn,
.primary-link {
  border: 0;
  border-radius: 14px;
  padding: 12px 18px;
  background: var(--primary);
  color: white;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}

.primary-btn:hover,
.primary-link:hover {
  background: var(--primary-dark);
}

.error-box {
  background: #fee2e2;
  color: #991b1b;
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 18px;
  font-weight: 700;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr;
}

.sidebar {
  background: var(--dark);
  color: white;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

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

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: var(--primary);
  color: white;
  display: grid;
  place-items: center;
  font-weight: 800;
}

.brand h1 {
  font-size: 18px;
  margin: 0;
}

.brand p {
  margin: 4px 0 0;
  color: #9ca3af;
  font-size: 13px;
}

.nav {
  display: grid;
  gap: 10px;
}

.nav a {
  padding: 12px 14px;
  border-radius: 12px;
  color: #d1d5db;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: white;
}

.logout-form {
  margin-top: auto;
}

.logout-form button {
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: white;
  cursor: pointer;
}

.main-content {
  padding: 34px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h2 {
  margin: 0;
  font-size: 32px;
}

.page-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.stat-card,
.panel,
.filter-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stat-card {
  padding: 22px;
}

.stat-card span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.stat-card strong {
  display: block;
  margin-top: 12px;
  font-size: 34px;
}

.content-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
}

.panel {
  padding: 22px;
}

@media (max-width: 920px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .stats-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .page-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .main-content {
    padding: 22px;
  }
}
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.panel-header h3 {
  margin: 0;
}

.panel-header a,
.panel-header span {
  color: var(--muted);
  font-size: 14px;
}

.empty-state {
  color: var(--muted);
  margin: 0;
}

.form-panel {
  max-width: 980px;
}

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

.form textarea {
  min-height: 120px;
  resize: vertical;
}

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

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.secondary-link {
  border-radius: 14px;
  padding: 12px 18px;
  background: #eef2f7;
  color: var(--text);
  font-weight: 700;
}

.table-wrapper {
  overflow-x: auto;
}

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

th {
  text-align: left;
  font-size: 13px;
  color: var(--muted);
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  padding: 12px;
}

td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.badge,
.age-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 700;
  text-transform: capitalize;
}

.badge.available {
  background: #dcfce7;
  color: #166534;
}

.badge.used {
  background: #dbeafe;
  color: #1e40af;
}

.badge.damaged,
.badge.discarded {
  background: #fee2e2;
  color: #991b1b;
}

.age-pill.fresh {
  background: #dcfce7;
  color: #166534;
}

.age-pill.notice {
  background: #ffedd5;
  color: #9a3412;
}

.age-pill.warning {
  background: #fef3c7;
  color: #92400e;
}

.age-pill.critical {
  background: #fee2e2;
  color: #991b1b;
}

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

.old-item {
  padding: 14px;
  border-radius: 14px;
  background: #f9fafb;
  border: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.old-item strong,
.old-item span {
  display: block;
}

.old-item span {
  color: var(--muted);
  margin-top: 4px;
}

.old-item p {
  margin: 0;
  color: var(--muted);
  white-space: nowrap;
}

@media (max-width: 920px) {
  .grid-form {
    grid-template-columns: 1fr;
  }
}
.filter-panel {
  padding: 18px;
  margin-bottom: 20px;
}

.filter-form {
  display: grid;
  grid-template-columns: 1fr 180px auto;
  gap: 12px;
}

.filter-form input,
.filter-form select,
.filter-form button {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  background: white;
}

.filter-form button {
  background: var(--dark);
  color: white;
  cursor: pointer;
}

.actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.actions a,
.actions button {
  border: 0;
  border-radius: 10px;
  padding: 8px 10px;
  background: #eef2f7;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
}

.actions form {
  margin: 0;
}

.actions .danger-btn {
  background: #fee2e2;
  color: #991b1b;
}

@media (max-width: 920px) {
  .filter-form {
    grid-template-columns: 1fr;
  }

  .actions {
    flex-wrap: wrap;
  }
}
.mobile-inventory-list {
  display: none;
}

.screen-card {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  background: #ffffff;
  display: grid;
  gap: 14px;
}

.screen-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.screen-label {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.screen-card h3 {
  margin: 4px 0 0;
  font-size: 24px;
}

.screen-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.screen-card-grid div {
  background: #f9fafb;
  border-radius: 14px;
  padding: 12px;
}

.screen-card-grid span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 4px;
}

.screen-card-grid strong {
  font-size: 15px;
}

.screen-card-date {
  color: var(--muted);
  font-size: 14px;
}

.screen-card-actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.screen-card-actions a,
.screen-card-actions button {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 11px 10px;
  background: #eef2f7;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.screen-card-actions form {
  margin: 0;
}

.screen-card-actions .danger-btn {
  background: #fee2e2;
  color: #991b1b;
}

@media (max-width: 700px) {
  .desktop-inventory-table {
    display: none;
  }

  .mobile-inventory-list {
    display: grid;
    gap: 14px;
  }

  .panel {
    padding: 14px;
  }

  .screen-card-actions {
    grid-template-columns: 1fr;
  }
}
.actions .discard-btn,
.screen-card-actions .discard-btn {
  background: #fef3c7;
  color: #92400e;
}
.muted-text {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.page-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

@media (max-width: 700px) {
  .page-actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
  }

  .page-actions a {
    width: 100%;
  }
}