:root {
  --primary-color: #007bff;
  --primary-color-hover: #0056b3;
  --success-color: #28a745;
  --success-color-hover: #1e7e34;
  --danger-color: #dc3545;
  --danger-color-hover: #b52b39;
  --secondary-color: #6c757d;
  --secondary-color-hover: #545b62;

  --text-color: #212529;
  --text-color-light: #495057;
  --background-color: #f8f9fa;
  --surface-color: #ffffff;
  --border-color: #dee2e6;

  --font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --border-radius: 0.375rem;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.08);
  --transition-speed: 0.2s;
}

body.dark-mode {
  --primary-color: #0d6efd;
  --primary-color-hover: #3d8bfd;
  --success-color: #198754;
  --success-color-hover: #20ac6b;
  --danger-color: #dc3545;
  --danger-color-hover: #e45d6a;
  --secondary-color: #495057;
  --secondary-color-hover: #6c757d;

  --text-color: #dee2e6;
  --text-color-light: #adb5bd;
  --background-color: #121212;
  --surface-color: #1e1e1e;
  --border-color: #495057;

  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.container {
  max-width: 1260px;
  margin: 2rem auto;
  padding: 2rem;
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: background-color var(--transition-speed) ease;
}

h1 {
  color: var(--text-color);
  text-align: center;
  margin-bottom: 2rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.user-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  table-layout: fixed;
}

.user-table th,
.user-table td {
  padding: 0.9rem 1rem;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-speed) ease;
}

.user-table th {
  font-weight: 600;
  background-color: var(--surface-color);
  color: var(--text-color-light);
  border-bottom-width: 2px;
}

.user-table tbody tr {
  transition: background-color var(--transition-speed) ease;
}

.user-table tbody tr:hover {
  background-color: rgba(108, 117, 125, 0.1);
}

.stock-table th:nth-child(1) {
  width: 5%;
}

.stock-table th:nth-child(2) {
  width: 30%;
}

.stock-table th:nth-child(3) {
  width: 8%;
}

.stock-table th:nth-child(4) {
  width: 8%;
}

.stock-table th:nth-child(5) {
  width: 17%;
}

.stock-table th:nth-child(6) {
  width: 8%;
}

.stock-table th:nth-child(7) {
  width: 18%;
}

.stock-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  table-layout: fixed;
}

.stock-table th,
.stock-table td {
  padding: 0.9rem 1rem;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-speed) ease;
}

.stock-table th {
  font-weight: 600;
  background-color: var(--surface-color);
  color: var(--text-color-light);
  border-bottom-width: 2px;
}

.stock-table tbody tr {
  transition: background-color var(--transition-speed) ease;
}

.stock-table tbody tr:hover {
  background-color: rgba(108, 117, 125, 0.1);
}

.btn {
  display: inline-block;
  font-weight: 600;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  border-radius: var(--border-radius);
  transition: all var(--transition-speed) ease-in-out;
}

.btn:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  box-shadow: none;
}

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

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  color: #fff;
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-color-hover);
  border-color: var(--primary-color-hover);
}

.btn-success {
  color: #fff;
  background-color: var(--success-color);
  border-color: var(--success-color);
}

.btn-success:hover {
  background-color: var(--success-color-hover);
  border-color: var(--success-color-hover);
}

.btn-danger {
  color: #fff;
  background-color: var(--danger-color);
  border-color: var(--danger-color);
}

.btn-danger:hover {
  background-color: var(--danger-color-hover);
  border-color: var(--danger-color-hover);
}

.btn-secondary {
  color: var(--text-color);
  background-color: #e9ecef;
  border-color: #e9ecef;
}

body.dark-mode .btn-secondary {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  color: #fff;
}

body.dark-mode .btn-secondary:hover {
  background-color: var(--secondary-color-hover);
  border-color: var(--secondary-color-hover);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

input[type="text"],
input[type="password"],
input[type="number"],
select {
  display: block;
  width: 100%;
  padding: 0.6rem 0.8rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--surface-color);
  background-clip: padding-box;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-speed) ease-in-out, box-shadow var(--transition-speed) ease-in-out;
}

input:focus,
select:focus {
  color: var(--text-color);
  background-color: var(--surface-color);
  border-color: var(--primary-color);
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 1;
  transition: opacity var(--transition-speed) ease;
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal-content {
  background-color: var(--surface-color);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  width: 90%;
  max-width: 500px;
  position: relative;
  transform: scale(1);
  transition: transform var(--transition-speed) ease;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.close-button {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text-color);
  text-shadow: none;
  opacity: 0.7;
  cursor: pointer;
  transition: opacity var(--transition-speed) ease;
}

.close-button:hover {
  opacity: 1;
}

@media (max-width: 768px) {
  .container {
    margin: 1rem;
    padding: 1.5rem;
  }
}

.search-container {
  margin-bottom: 1.5rem;
}

#search-input {
  width: 100%;
  font-size: 1rem;
  padding: 0.75rem 1rem;
}

.role-select {
  cursor: pointer;
  min-width: 150px;
}

.header-actions {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
  padding: 0 0.5rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-creation-form {
  background-color: var(--background-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
}

.user-creation-form h2 {
  margin-top: 0;
  margin-bottom: 1.5rem;
  text-align: left;
  font-size: 1.5rem;
}

.stock-table td:last-child {
  display: flex;
  gap: 10px;
}

@media (max-width: 768px) {
  .stock-table thead {
    display: none;
  }

  .stock-table tr {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--box-shadow);
  }

  .stock-table td {
    display: block;
    border: none;
    padding: 0.5rem 0;
    height: auto;
    width: auto;
  }

  .stock-table td::before {
    content: "";
    display: none;
  }

  .stock-table td:nth-child(1) {
    flex-basis: 5%;
    text-align: left;
    font-weight: 600;
  }

  .stock-table td:nth-child(2) {
    flex-basis: 95%;
    text-align: right;
    font-size: 1.1rem;
  }

  .stock-table td:nth-child(3) {
    flex-basis: 48%;
    text-align: right;
  }

  .stock-table td:nth-child(4) {
    flex-basis: 48%;
    text-align: left;
  }

  .stock-table td:nth-child(5) {
    flex-basis: 58%;
    text-align: left;
  }

  .stock-table td:nth-child(6) {
    flex-basis: 38%;
    text-align: right;
    font-size: 0.9rem;
    color: var(--text-color-light);
  }

  .stock-table td:nth-child(7) {
    flex-basis: 100%;
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
  }
}