/* ==============================================
   Global Styles — Reset, Base, Utilities
   ============================================== */

/* ---- Reset ---- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ---- Base ---- */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-gray-900);
  background-color: var(--color-gray-50);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ---- Focus Accessibility ---- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
}

/* ---- Layout Utilities ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

.max-w-600 {
  max-width: 600px;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* ---- Text Utilities ---- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-error { color: var(--color-error); }
.text-success { color: var(--color-success); }
.text-muted { color: var(--color-gray-500); }

/* ---- Spacing Utilities ---- */
.mt-4 { margin-top: var(--spacing-4); }
.mb-4 { margin-bottom: var(--spacing-4); }
.p-4 { padding: var(--spacing-4); }

/* ---- Back Button ---- */
.back-button,
.back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--color-gray-700);
  cursor: pointer;
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
}

.back-button:hover,
.back-btn:hover {
  background: var(--color-gray-100);
}

/* ---- Animations ---- */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-fadeIn {
  animation: fadeIn 0.3s ease-out;
}

/* ---- Flash Messages ---- */
.flash-messages {
  position: fixed;
  top: var(--spacing-4);
  right: var(--spacing-4);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.flash-message {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.3s ease-out;
  max-width: 400px;
}

.flash-message-success {
  background: var(--color-success-light);
  color: var(--color-success-dark);
  border: 1px solid var(--color-success-border);
}

.flash-message-error {
  background: var(--color-error-light);
  color: var(--color-error-dark);
  border: 1px solid var(--color-error-border);
}

.flash-message-warning {
  background: var(--color-warning-light);
  color: var(--color-warning-dark);
  border: 1px solid var(--color-warning-border);
}

.flash-message-info {
  background: var(--color-info-light);
  color: var(--color-info-dark);
  border: 1px solid var(--color-info-border);
}

.flash-message-close {
  margin-left: auto;
  border: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
  padding: var(--spacing-1);
  opacity: 0.7;
}

.flash-message-close:hover {
  opacity: 1;
}

/* ---- Page Header ---- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
}

.page-header-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-900);
}

.page-content {
  padding: var(--spacing-6);
}

/* ---- Loading Spinner ---- */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-8);
}

.loading-spinner::after {
  content: '';
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

/* ---- Table Styles ---- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.data-table th {
  padding: var(--spacing-3) var(--spacing-4);
  text-align: left;
  font-weight: 600;
  color: var(--color-gray-600);
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}

.data-table td {
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--color-gray-700);
  border-bottom: 1px solid var(--color-gray-100);
}

.data-table tr:hover td {
  background: var(--color-gray-50);
}

/* ---- Card ---- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  overflow: hidden;
}

.card-header {
  padding: var(--spacing-4) var(--spacing-5);
  border-bottom: 1px solid var(--color-gray-100);
}

.card-body {
  padding: var(--spacing-5);
}

.card-footer {
  padding: var(--spacing-4) var(--spacing-5);
  border-top: 1px solid var(--color-gray-100);
}

/* ---- Pagination ---- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4);
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-btn-active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}