/* ========================================
   MUSEALYTICS - UI Styles
   Modal, Toast, Loading, Theme, Language
   ======================================== */

/* ----------------------------------------
   Modal
   ---------------------------------------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.modal.visible {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.modal-dialog {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 480px;
  width: 100%;
  animation: modalIn 0.3s var(--ease-out);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  padding: 0;
  background: var(--bg-hover);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast);
}

.modal-close:hover {
  background: var(--border-light);
  color: var(--text-primary);
}

.modal-close svg {
  width: 18px;
  height: 18px;
}

.modal-dialog h2 {
  font-size: var(--font-xl);
  margin-bottom: var(--space-6);
  padding-right: var(--space-8);
}

.help-steps {
  list-style: none;
  counter-reset: step;
  margin-bottom: var(--space-6);
}

.help-steps li {
  counter-increment: step;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  color: var(--text-secondary);
  line-height: 1.5;
}

.help-steps li::before {
  content: counter(step);
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-sm);
  font-weight: 600;
  flex-shrink: 0;
}

/* ----------------------------------------
   Theme Toggle
   ---------------------------------------- */
.theme-toggle {
  position: fixed;
  bottom: var(--space-6);
  left: var(--space-6);
  width: 48px;
  height: 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  z-index: 50;
  transition: all var(--duration-fast);
}

.theme-toggle:hover {
  transform: scale(1.1);
  border-color: var(--accent);
}

.theme-toggle svg {
  width: 22px;
  height: 22px;
  color: var(--text-secondary);
}

.theme-toggle .icon-moon { display: none; }

[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ----------------------------------------
   Language Selector
   ---------------------------------------- */
.lang-selector {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 50;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--duration-fast);
}

.lang-toggle:hover {
  border-color: var(--accent);
}

.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-2);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: none;
  min-width: 140px;
}

.lang-dropdown.visible {
  display: block;
}

.lang-option {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: none;
  border: none;
  font-size: var(--font-sm);
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: background var(--duration-fast);
}

.lang-option:hover {
  background: var(--bg-hover);
}

/* ----------------------------------------
   Toast
   ---------------------------------------- */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  padding: var(--space-4) var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-sm);
  animation: toastIn 0.3s var(--ease-out);
}

.toast.success {
  border-left: 3px solid var(--success);
}

.toast.error {
  border-left: 3px solid var(--error);
}

.toast.info {
  border-left: 3px solid var(--accent);
}

.toast.warning {
  border-left: 3px solid var(--warning);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ----------------------------------------
   Loading
   ---------------------------------------- */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  z-index: 300;
}

.loading-overlay.visible {
  display: flex;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-text {
  color: var(--text-secondary);
}