/* ============ Buttons ============ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--text-base);
  font-weight: 500;
  text-align: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    background-color var(--duration-fast),
    opacity var(--duration-fast),
    transform var(--duration-instant) ease,
    box-shadow var(--duration-fast) ease;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-text-25);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px var(--color-text-20);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

.btn-large {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--text-md);
}

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

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger-dark);
  border-color: var(--color-danger-dark);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--text-sm);
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-primary);
  padding: 0;
  text-decoration: underline;
}

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

/* ============ Forms ============ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.form-group
  :is(
    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"],
    textarea,
    select
  ) {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-text-30);
  border-radius: var(--radius-sm);
  transition:
    border-color var(--duration-fast),
    box-shadow var(--duration-normal) ease,
    transform var(--duration-fast) ease;
}

.form-group
  :is(
    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"],
    textarea,
    select
  ):focus {
  outline: 2px solid transparent;
  border-color: var(--color-primary);
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--color-primary) 15%, transparent),
    0 2px 8px color-mix(in srgb, var(--color-primary) 10%, transparent);
  transform: translateY(-1px);
}

.form-group:focus-within > label {
  color: var(--color-primary-dark);
  transition: color var(--duration-fast) ease;
}

.form-group input::placeholder {
  color: var(--color-text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-group select {
  cursor: pointer;
}

.form-error {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--color-danger-bg);
  border-radius: var(--radius-sm);
  color: var(--color-danger);
}

/* ============ Dialog / Modal ============ */

dialog {
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  width: 90%;
  max-width: var(--container-md);
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-card-bg);
  box-shadow: var(--shadow-lg);
}

dialog::backdrop {
  background: light-dark(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6));
}

dialog[open] {
  animation: dialogFadeIn 0.2s ease-out;
}

@keyframes dialogFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

dialog.modal-lg {
  max-width: var(--container-modal-lg);
}

.modal-header {
  margin-bottom: var(--spacing-md);
}

.modal-close {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  line-height: 1;
  padding: var(--spacing-sm);
  min-width: 44px;
  min-height: 44px;
}

.modal-close:hover {
  color: var(--color-text);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

/* ============ Alerts ============ */

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
}

.alert-error,
.alert-success,
.alert-warning {
  background: var(--_alert-bg);
  color: var(--_alert-text);
  border: 1px solid var(--_alert-border);
}

.alert-error {
  --_alert-bg: var(--color-alert-error-bg);
  --_alert-text: var(--color-danger);
  --_alert-border: var(--color-alert-error-border);
}
.alert-success {
  --_alert-bg: var(--color-alert-success-bg);
  --_alert-text: var(--color-success);
  --_alert-border: var(--color-alert-success-border);
}
.alert-warning {
  --_alert-bg: var(--color-alert-warning-bg);
  --_alert-text: var(--color-alert-warning-text);
  --_alert-border: var(--color-alert-warning-border);
  margin: var(--spacing-md) 0;
}

/* ============ Loading & Empty States ============ */

.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  color: var(--color-text-muted);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: var(--spacing-sm);
}

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

code {
  background: var(--color-background);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.875em;
}

/* Focus ring */
.btn:focus-visible,
.nav-link:focus-visible,
.hamburger-button:focus-visible,
.home-link:focus-visible,
.modal-close:focus-visible,
.msms-placeholder-tag:focus-visible,
.file-input-label:focus-within,
.checkbox-label:focus-within {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.pagination {
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.pagination-info {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ============ Theme Toggle ============ */

.theme-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.theme-icon-sun,
.theme-icon-moon {
  position: absolute;
  transition:
    transform var(--duration-normal) ease,
    opacity var(--duration-normal) ease;
}

/* Sun: circle with 8 radiating rays via box-shadow */
.theme-icon-sun {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow:
    0 -10px 0 -3.5px var(--color-primary),
    0 10px 0 -3.5px var(--color-primary),
    -10px 0 0 -3.5px var(--color-primary),
    10px 0 0 -3.5px var(--color-primary),
    -7px -7px 0 -4px var(--color-primary),
    7px -7px 0 -4px var(--color-primary),
    -7px 7px 0 -4px var(--color-primary),
    7px 7px 0 -4px var(--color-primary);
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* Moon: crescent via offset box-shadow */
.theme-icon-moon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: transparent;
  box-shadow: -5px 0 0 0 var(--color-primary);
  margin-left: 15px;
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

/* Dark mode: sun rotates out, moon rotates in */
.theme-toggle-dark .theme-icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

.theme-toggle-dark .theme-icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* Hover: scale up the visible icon */
.theme-toggle-light:hover .theme-icon-sun {
  transform: scale(1.15);
}

.theme-toggle-dark:hover .theme-icon-moon {
  transform: scale(1.15);
}

/* Desktop floating toggle: fixed bottom-right, hidden on mobile */
.desktop-theme-toggle {
  display: none;
}

@media (min-width: 768px) {
  .desktop-theme-toggle {
    display: inline-flex;
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    left: auto;
    z-index: 10;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    width: 48px;
    height: 48px;
    overflow: visible;
  }
}