:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --primary: #468be5;
  --primary-dark: #3730a3;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #eef2ff 0%, #f8fafc 100%);
  color: var(--text);
  display: grid;
  place-items: center;
}

.container {
  width: min(100%, 1100px);
  padding: 24px;
}

.card {
  width: 100%;
  background: var(--card);
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(79, 70, 229, 0.12);
  padding: 32px 24px;
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

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

.field-group {
  display: grid;
  gap: 8px;
}

label {
  font-weight: 700;
  font-size: 0.95rem;
}

input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

button {
  border: none;
  border-radius: 12px;
  background: var(--primary);
  color: white;
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 18px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

button:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.result {
  width: 100%;
  margin-top: 28px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 18px;
  text-align: center;
}

.result-label {
  margin: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 700;
}

#bmi-value {
  margin: 12px 0 8px;
  font-size: 2.2rem;
  color: var(--primary-dark);
}

#bmi-category {
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

/* Enhanced table and button styles for bmicrud */
.styled-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(19, 18, 31, 0.06);
}

.styled-table thead tr {
  background: linear-gradient(90deg, #6c5ce7, #00d2ff);
  color: #fff;
  text-align: left;
  font-weight: 700;
}

.styled-table th,
.styled-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.styled-table tbody tr:nth-child(even) {
  background: #fbfbff;
}

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

.edit-link {
  display: inline-block;
  padding: 8px 12px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: 700;
}

.primary-btn {
  background: linear-gradient(90deg,#6c5ce7,#00d2ff);
  color: #fff;
  padding: 12px 18px;
  border-radius: 12px;
  border: none;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(76,34,255,0.12);
}

.primary-btn:hover { transform: translateY(-2px); }

.delete-btn {
  padding: 8px 12px;
  background: transparent;
  border: 1px solid rgba(239,68,68,0.12);
  color: var(--danger);
  border-radius: 8px;
  cursor: pointer;
}

.delete-btn:hover { background: rgba(239,68,68,0.06); }

.cancel-link {
  margin-left: 12px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
}

.modal-actions { display: flex; gap: 10px; align-items: center; margin-top: 12px; }
.modal-actions .primary-btn { padding: 10px 14px; }
.modal-actions .cancel-link { margin-left: 0; }

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.page-link,
.page-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 36px;
  padding: 0 12px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  color: var(--primary-dark);
  background: #edf2ff;
  border: 1px solid #dfe7ff;
}

.page-number.active {
  background: linear-gradient(90deg, #6c5ce7, #00d2ff);
  color: #fff;
  border-color: transparent;
}

.page-link:hover,
.page-number:hover {
  filter: brightness(0.98);
}

.dataTables_wrapper {
  margin-top: 16px;
}

.dataTables_filter {
  margin-bottom: 12px;
}

.dataTables_filter input {
  width: 220px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.dataTables_length select {
  border-radius: 8px;
  border: 1px solid var(--border);
  padding: 8px 10px;
}

.dataTables_paginate .paginate_button {
  border-radius: 8px;
  margin: 0 2px;
  padding: 8px 12px;
  background: #edf2ff;
  color: var(--primary-dark);
  border: 1px solid #dfe7ff;
}

.dataTables_paginate .paginate_button.current,
.dataTables_paginate .paginate_button:hover {
  background: linear-gradient(90deg, #6c5ce7, #00d2ff);
  border-color: transparent;
  color: #fff !important;
}

.table-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  margin-bottom: 12px;
}

.table-toolbar input {
  flex: 1;
  min-width: 0;
}

.print-btn {
  background: linear-gradient(90deg, #22c55e, #16a34a);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 11px 16px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 16px rgba(34, 197, 94, 0.2);
}

.print-btn:hover {
  filter: brightness(1.05);
}

@media print {
  body * {
    visibility: hidden;
  }

  .history-box, .history-box * {
    visibility: visible;
  }

  .history-box {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    padding: 0;
  }

  .table-toolbar,
  .row-actions,
  .pagination,
  .header,
  .form,
  .result,
  .modal-backdrop,
  .cancel-link {
    display: none !important;
  }
}