.login{
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.error{ /* Login wrong username/password */
    color: red;
    text-align: center;
    line-height: 0;
}

.errorSignup{ /* Signup passwords do not match or username already in use */
    color: red;
    text-align: center;
    line-height: 3;
    height: 0px;
    visibility: hidden;
}

.signup{
    padding: 50px 50px;
    background: white;
    display: flex;
    flex-direction: column;
    gap: 3px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.button-29 {
  align-items: center;
  appearance: none;
  background-image: linear-gradient(90deg, #2f6dc8, #1f4fa5);
  border: 0;
  border-radius: 6px;
  box-shadow: rgba(45, 35, 66, .4) 0 2px 4px,rgba(45, 35, 66, .3) 0 7px 13px -3px,rgba(58, 65, 111, .5) 0 -3px 0 inset;
  box-sizing: border-box;
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  font-family: "JetBrains Mono",monospace;
  height: 48px;
  justify-content: center;
  line-height: 1;
  list-style: none;
  overflow: hidden;
  padding-left: 16px;
  padding-right: 16px;
  position: relative;
  text-align: left;
  text-decoration: none;
  transition: box-shadow .15s,transform .15s;
  user-select: none;
  touch-action: manipulation;
  white-space: nowrap;
  will-change: box-shadow,transform;
  font-size: 18px;
}

.button-29:focus {
  box-shadow: #3c4fe0 0 0 0 1.5px inset, rgba(45, 35, 66, .4) 0 2px 4px, rgba(45, 35, 66, .3) 0 7px 13px -3px, #3c4fe0 0 -3px 0 inset;
}

.button-29:hover {
  box-shadow: rgba(45, 35, 66, .4) 0 4px 8px, rgba(45, 35, 66, .3) 0 7px 13px -3px, #3c4fe0 0 -3px 0 inset;
  transform: translateY(-2px);
}

.button-29:active {
  box-shadow: #3c4fe0 0 3px 7px inset;
  transform: translateY(2px);
}

.site-header {
  position: fixed;   /* fixed to the viewport */
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  text-align: center;
  background: #0f172a;
  color: #fff;
  padding: 16px 24px;
  border-bottom: 1px solid #1f2937;
}

/*contactBox when adding/editing contacts*/
.addContactBox,.editContactBox{
  z-index: 15;
  background:lightblue;
  padding: 20px;
  line-height: 2;
  border-radius: 14px;

  /*centered*/
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  /*        */
}

/* Card shell */
.card {
  margin-top: 135px;   /* small gap above */
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
  overflow: hidden;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid #e5e7eb;
}
.card-header h2 { margin: 0; font-size: 16px; font-weight: 600; }

/* Table wrapper enables horizontal scroll on small screens */
.table-wrap { overflow-x: auto; }

/* Table base */
table.contacts {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;                  /* predictable column widths */
  font-size: 14px;
}

/* Sticky header */
.contacts thead th {
  position: sticky; top: 0; z-index: 1;
  background: #f8fafc;                  /* header bg */
  color: #475569;                        /* header text */
  text-transform: uppercase; letter-spacing: .04em; font-size: 12px;
  border-bottom: 1px solid #e5e7eb;
  padding: 10px 12px;
}

/* Cells */
.contacts tbody td {
  padding: 12px;
  border-bottom: 1px solid #f1f5f9;
  color: #0f172a;
  vertical-align: middle;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; /* truncation */
}

/* Column sizing (tweak as needed) */
.col-first   { width: 15%; }
.col-last  { width: 15%; }
.col-email  { width: 25%; }
.col-phone   { width: 8%; }
.col-actions{ width: 10%; text-align: right; }


/* Action buttons (edit/delete) */
.row-actions { display: inline-flex; gap: 8px; }
.btn-icon {
  display: inline-flex; align-items: center; justify-content: center;
  height: 32px; width: 32px; border-radius: 8px; border: 1px solid #e5e7eb;
  background: #fff; cursor: pointer;
}
.btn-icon:hover { background: #f1f5f9; }
.btn-danger { border-color: #fecaca; background: #fff0f0; }
.btn-danger:hover { background: #fee2e2; }

/* Empty state */
.table-empty {
  text-align: center; color: #64748b; padding: 24px;
}

/* Responsive tweaks */
@media (max-width: 720px) {
  .col-first { display: none; }       /* hide less critical column */
  .col-last { width: 42%; }
  .col-email { width: 22%; }
  .col-phone { width: 12% }
  .col-actions { width: 12%; }
}