:root {
    --paper: #F7F6F2;
    --paper-2: #FFFFFF;
    --ink: #1E2A3A;
    --slate: #5B6B7C;
    --slate-light: #8B97A3;
    --hairline: #DAD6CC;
    --amber: #B8863E;
    --amber-bg: #FBF1E1;
    --moss: #4F7358;
    --moss-bg: #EBF1EC;
    --red: #A6473A;
  }

  * { box-sizing: border-box; }

  html, body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
  }

  .mono {
    font-family: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
    font-variant-numeric: tabular-nums;
  }

  .wrap {
    max-width: 920px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 5rem;
  }

  header.masthead {
    border-bottom: 2px solid var(--ink);
    padding-bottom: 1.1rem;
    margin-bottom: 0.4rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
  }

  nav {
    padding-bottom: 1.1rem;
    margin-bottom: 0.4rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
  }


  h1 {
    font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
    font-weight: 400;
    font-size: 2rem;
    letter-spacing: 0.01em;
    margin: 0;
  }

  .masthead .meta {
    font-size: 0.78rem;
    color: var(--slate);
    text-align: right;
    line-height: 1.5;
  }

  .shared-note {
    font-size: 0.72rem;
    color: var(--amber);
    background: var(--amber-bg);
    border: 1px solid #EAD6B0;
    border-radius: 4px;
    padding: 0.5rem 0.8rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  section {
    margin-bottom: 2.75rem;
  }

  .section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 0.9rem;
  }

  .section-head h2 {
    font-family: Georgia, serif;
    font-weight: 400;
    font-size: 1.15rem;
    margin: 0;
    color: var(--ink);
  }

  .section-head .count {
    font-size: 0.75rem;
    color: var(--slate-light);
  }

  /* Card chips */
  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 0.7rem;
  }

  .chip {
    background: var(--paper-2);
    border: 1px solid var(--hairline);
    border-radius: 6px;
    padding: 0.85rem 1rem;
    position: relative;
  }

  .chip .top-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
  }

  .chip .name {
    font-size: 0.95rem;
    font-weight: 600;
  }

  .chip .last-four {
    font-size: 0.78rem;
    color: var(--slate);
    margin-top: 0.15rem;
  }

  .led {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.3rem;
  }
  .led.available { background: var(--moss); }
  .led.out { background: var(--amber); }

  .chip .status-line {
    margin-top: 0.6rem;
    font-size: 0.78rem;
    color: var(--slate);
  }
  .chip .status-line.out { color: var(--amber); }
  .chip .status-line.available { color: var(--moss); }

  .chip .remove-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    color: var(--slate-light);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 0.2rem 0.4rem;
    opacity: 0;
    transition: opacity 0.15s ease;
  }
  .chip:hover .remove-btn { opacity: 1; }
  .chip .remove-btn:hover { color: var(--red); }

  /* Forms */
  .panel {
    background: var(--paper-2);
    border: 1px solid var(--hairline);
    border-radius: 6px;
    padding: 1.25rem 1.4rem;
  }

  .field-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    align-items: flex-end;
  }

  .field {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    flex: 1 1 140px;
  }

  .submit-row {
    display: flex;
    align-content:space-between;
    gap: 1rem;
    justify-content: flex-end;
    align-items: flex-end;
    flex: 1;
  }

  

  label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--slate);
  }

  input, select {
    font-family: inherit;
    font-size: 0.9rem;
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--hairline);
    border-radius: 4px;
    background: var(--paper);
    color: var(--ink);
  }

  input:focus, select:focus, button:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 1px;
  }

  button {
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.55rem 1.1rem;
    border-radius: 4px;
    border: 1px solid var(--ink);
    background: var(--ink);
    color: var(--paper);
    cursor: pointer;
    white-space: nowrap;
    transition: opacity 0.15s ease;
  }
  button:hover { opacity: 0.85; }
  button:disabled {
    background: var(--hairline);
    border-color: var(--hairline);
    color: var(--slate-light);
    cursor: not-allowed;
    opacity: 1;
  }

  button.secondary {
    background: transparent;
    color: var(--ink);
  }

  button.small {
    padding: 0.35rem 0.7rem;
    font-size: 0.72rem;
  }

  .error-msg {
    color: var(--red);
    font-size: 0.78rem;
    margin-top: 0.6rem;
  }

  /* Tables */
  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
  }

  th {
    text-align: left;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--slate);
    font-weight: 600;
    padding: 0.4rem 0.6rem;
    border-bottom: 1px solid var(--ink);
  }

  td {
    padding: 0.55rem 0.6rem;
    border-bottom: 1px solid var(--hairline);
    vertical-align: middle;
  }

  tr:last-child td { border-bottom: none; }

  .badge {
    display: inline-block;
    font-size: 0.68rem;
    padding: 0.18rem 0.5rem;
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: 0.02em;
  }
  .badge.out { background: var(--amber-bg); color: var(--amber); }
  .badge.in { background: var(--moss-bg); color: var(--moss); }

  .empty-state {
    color: var(--slate-light);
    font-size: 0.85rem;
    font-style: italic;
    padding: 1rem 0;
  }

  .checkin-btn {
    background: transparent;
    color: var(--moss);
    border: 1px solid var(--moss);
    padding: 0.3rem 0.65rem;
    font-size: 0.72rem;
  }

  .checkoutContainer {
    padding-top: 0.5rem;
    display: flex;
    justify-content: flex-end; /* Pushes the button to the right */
  }
  #btnCheckOut {background: var(--moss); color: var(--paper); border-color: var(--moss);}
  .btnCheckOut {
    background: var(--moss);
    color: var(--paper);
    border-color: var(--moss);
    text-decoration: none;
    font-size: 0.82rem;
    font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.55rem 1.1rem;
  border-radius: 4px;
  }
  .btnCheckOut:hover { opacity: 0.85;transition: opacity 0.15s ease; }

  dialog {
    border: none;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 1.5rem;
    max-width: 400px;
    width: 90%;
  }

  div:has(> #login-form){
    display: flex;
    justify-content: center; /* Centers horizontally */
    align-items: center;     /* Centers vertically (requires div height) */
  }

  nav#homeNav {
    display: flex;
    justify-content:flex-end;
    gap: 5rem;
    margin: 0.5rem;
  }
  
  @media (max-width: 560px) {
    table, thead, tbody, th, td, tr { display: block; }
    thead { display: none; }
    tr { border-bottom: 2px solid var(--hairline); padding: 0.6rem 0; }
    td { border-bottom: none; padding: 0.2rem 0; }
    td::before {
      content: attr(data-label);
      display: inline-block;
      width: 100px;
      color: var(--slate-light);
      font-size: 0.7rem;
      text-transform: uppercase;
    }
  }