/* ============================================
   801UU Base Styles — Reset + Foundation
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@400;500&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0&display=swap');

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

table {
  border-collapse: collapse;
}

/* ---- Material Symbols ---- */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  user-select: none;
}

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

:focus:not(:focus-visible) {
  outline: none;
}

/* ---- Selection ---- */
::selection {
  background: var(--color-primary-container);
  color: var(--color-text-primary);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

/* ---- Utility Classes ---- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-7);
}

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

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 40px;
  padding: 0 var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1;
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  min-width: 88px;
}

.btn:disabled {
  opacity: 0.38;
  pointer-events: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

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

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: var(--color-background);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

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

.btn-text {
  background: transparent;
  color: var(--color-primary);
  padding: 0 var(--space-3);
  min-width: auto;
}

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

.btn-danger {
  background: var(--color-error);
  color: var(--color-text-on-primary);
}

.btn-danger:hover {
  background: #D93025;
}

.btn-success {
  background: var(--color-success);
  color: var(--color-text-on-primary);
}

.btn-success:hover {
  background: #2D9249;
}

.btn-lg {
  height: 48px;
  padding: 0 var(--space-7);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

.btn-sm {
  height: 32px;
  padding: 0 var(--space-4);
  font-size: var(--text-xs);
}

.btn-icon {
  width: 40px;
  min-width: 40px;
  padding: 0;
  border-radius: var(--radius-full);
}

.btn-icon.btn-sm {
  width: 32px;
  min-width: 32px;
}

/* ---- Cards ---- */
.card {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: background var(--transition-fast);
}

.card-hover:hover {
  background: var(--color-surface);
}

.card-tonal {
  border: none;
}

.card-tonal-blue {
  background: var(--color-primary-container);
}

.card-tonal-green {
  background: var(--color-success-container);
}

.card-tonal-yellow {
  background: var(--color-warning-container);
}

.card-tonal-red {
  background: var(--color-error-container);
}

/* ---- Input ---- */
.input-group {
  position: relative;
  margin-bottom: var(--space-5);
}

.input-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.input-field {
  width: 100%;
  height: 48px;
  padding: 0 var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  transition: border-color var(--transition-fast);
}

.input-field:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary-container);
}

.input-field::placeholder {
  color: var(--color-text-disabled);
}

.input-field.error {
  border-color: var(--color-error);
}

.input-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
}

/* ---- Chips / Tags ---- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  height: 28px;
  padding: 0 var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: 14px;
  white-space: nowrap;
}

.chip-default {
  background: var(--color-surface-variant);
  color: var(--color-text-secondary);
}

.chip-primary {
  background: var(--color-primary-container);
  color: var(--color-primary);
}

.chip-success {
  background: var(--color-success-container);
  color: var(--color-success);
}

.chip-warning {
  background: var(--color-warning-container);
  color: #E37400;
}

.chip-error {
  background: var(--color-error-container);
  color: var(--color-error);
}

/* ---- Tabs ---- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
}

.tab-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.tab-item:hover {
  color: var(--color-primary);
  background: var(--color-primary-container);
}

.tab-item.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ---- Tables ---- */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.data-table td {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background: var(--color-surface);
}

/* ---- Modal ---- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  background: var(--color-background);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-modal);
  animation: modalIn var(--transition-normal) forwards;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-4);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

/* ---- Toast / Snackbar ---- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-text-primary);
  color: var(--color-background);
  border-radius: var(--radius-xs);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastIn var(--transition-normal) forwards;
}

.toast.out {
  animation: toastOut var(--transition-fast) forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(8px); }
}

/* ---- Loading Spinner ---- */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.page-loader {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-5);
  }

  .btn-lg {
    width: 100%;
  }
}

@media (max-width: 430px) {
  .container {
    padding: 0 var(--space-4);
  }
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---- Print ---- */
@media print {
  .no-print { display: none !important; }
}