/* ChatFeed UI Components: Toasts, Modals, Confirm, Prompt, Form, Loading */

#ui-root { position: relative; z-index: 1000; }

/* === Toast === */
#toast-container {
  position: fixed;
  top: calc(20px + env(safe-area-inset-top, 0px));
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1100;
  pointer-events: none;
  max-width: calc(100vw - 40px);
}
.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-elev);
  color: var(--text);
  padding: 12px 16px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,.15);
  border-left: 4px solid var(--primary-500);
  pointer-events: auto;
  min-width: 280px;
  max-width: 420px;
  opacity: 0;
  transform: translateX(20px);
  transition: opacity .25s, transform .25s;
}
.toast.show { opacity: 1; transform: translateX(0); }
.toast-success { border-left-color: #10b981; }
.toast-error   { border-left-color: #ef4444; }
.toast-warning { border-left-color: #f59e0b; }
.toast-info    { border-left-color: var(--primary-500); }

.toast-icon {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  flex-shrink: 0;
  font-size: 16px;
}
.toast-success .toast-icon { background: #d1fae5; color: #047857; }
.toast-error .toast-icon   { background: #fee2e2; color: #b91c1c; }
.toast-warning .toast-icon { background: #fef3c7; color: #b45309; }
.toast-info .toast-icon    { background: var(--primary-100); color: var(--primary-700); }

.toast-body { flex: 1; min-width: 0; }
.toast-title { font-weight: 600; font-size: 14px; margin-bottom: 2px; }
.toast-message { font-size: 14px; color: var(--text-muted); word-wrap: break-word; }
.toast-close {
  background: transparent;
  border: none;
  font-size: 22px;
  color: var(--text-soft);
  cursor: pointer;
  width: 28px; height: 28px;
  border-radius: 6px;
  flex-shrink: 0;
}
.toast-close:hover { background: var(--bg-hover); color: var(--text); }

@media (max-width: 640px) {
  #toast-container { left: 12px; right: 12px; top: calc(12px + env(safe-area-inset-top, 0px)); }
  .toast { min-width: 0; max-width: none; }
}

/* === Modal === */
.ui-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .55);
  backdrop-filter: blur(3px);
  display: grid;
  place-items: center;
  z-index: 1200;
  opacity: 0;
  transition: opacity .2s;
  padding: 20px;
}
.ui-modal-backdrop.show { opacity: 1; }
.ui-modal {
  background: var(--bg-elev);
  color: var(--text);
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 60px rgba(0,0,0,.35);
  transform: scale(.95);
  transition: transform .2s;
  overflow: hidden;
}
.ui-modal-backdrop.show .ui-modal { transform: scale(1); }
.ui-modal-sm { max-width: 380px; }
.ui-modal-lg { max-width: 720px; }

.ui-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px 12px;
  border-bottom: 1px solid var(--border);
}
.ui-modal-header h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}
.ui-modal-close {
  background: transparent;
  border: none;
  font-size: 26px;
  width: 32px; height: 32px;
  border-radius: 8px;
  color: var(--text-soft);
  cursor: pointer;
  display: grid;
  place-items: center;
  line-height: 1;
}
.ui-modal-close:hover { background: var(--bg-hover); color: var(--text); }

.ui-modal-body {
  padding: 18px 22px;
  overflow-y: auto;
  flex: 1;
  font-size: 14px;
  color: var(--text);
}
.ui-modal-body p { margin: 0 0 12px; }
.ui-modal-body p:last-child { margin-bottom: 0; }

.ui-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 22px 18px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: background .15s;
}
.btn-secondary:hover { background: var(--border); }

.btn-danger {
  background: #dc2626;
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}
.btn-danger:hover { background: #b91c1c; }

/* === Alert variants inside modal === */
.ui-alert {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.ui-alert-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 700;
  flex-shrink: 0;
}
.ui-alert-success .ui-alert-icon { background: #d1fae5; color: #047857; }
.ui-alert-error .ui-alert-icon { background: #fee2e2; color: #b91c1c; }
.ui-alert-warning .ui-alert-icon { background: #fef3c7; color: #b45309; }
.ui-alert-info .ui-alert-icon { background: var(--primary-100); color: var(--primary-700); }
.ui-alert-message {
  flex: 1;
  font-size: 14px;
  color: var(--text);
  white-space: pre-wrap;
}

.ui-confirm-message {
  font-size: 14px;
  color: var(--text);
  line-height: 1.5;
}

/* === Prompt === */
.ui-prompt-label {
  font-size: 14px;
  color: var(--text);
  margin-bottom: 8px;
}
.ui-prompt-input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color .15s;
}
.ui-prompt-input:focus { border-color: var(--primary-500); box-shadow: 0 0 0 3px rgba(249, 115, 22, .12); }
.ui-prompt-input.error { border-color: #ef4444; }

/* === Form === */
.ui-form { display: flex; flex-direction: column; gap: 12px; }
.ui-form-row { display: flex; flex-direction: column; gap: 6px; }
.ui-form-row label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}
.ui-form-row input,
.ui-form-row select,
.ui-form-row textarea {
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  outline: none;
  font-family: inherit;
  transition: border-color .15s;
}
.ui-form-row input:focus,
.ui-form-row select:focus,
.ui-form-row textarea:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, .12);
}
.ui-form-row input.error,
.ui-form-row select.error,
.ui-form-row textarea.error { border-color: #ef4444; }
.ui-form-row textarea { resize: vertical; min-height: 80px; }

/* === Loading Overlay === */
.ui-loading {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .5);
  backdrop-filter: blur(3px);
  display: grid;
  place-items: center;
  z-index: 1300;
  opacity: 0;
  transition: opacity .2s;
}
.ui-loading.show { opacity: 1; }
.ui-spinner {
  width: 48px; height: 48px;
  border: 4px solid rgba(255,255,255,.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: ui-spin 0.8s linear infinite;
}
@keyframes ui-spin { to { transform: rotate(360deg); } }
.ui-loading-label {
  position: absolute;
  bottom: 35%;
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  text-shadow: 0 2px 8px rgba(0,0,0,.3);
}

/* Mobile fine-tuning */
@media (max-width: 640px) {
  .ui-modal { max-width: none; max-height: 92vh; border-radius: 14px; }
  .ui-modal-header { padding: 16px 18px 10px; }
  .ui-modal-body { padding: 14px 18px; }
  .ui-modal-footer { padding: 12px 18px 16px; flex-wrap: wrap; }
  .ui-modal-footer .btn { flex: 1; min-width: 100px; }
}