.chat-widget {
  position: fixed;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 900;
  font-family: var(--font-body);
}

.chat-widget__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.chat-widget__telegram-btn,
.chat-widget__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border: var(--border-width) solid var(--color-outline-variant);
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-on-primary);
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(26, 23, 20, 0.18);
  transition: transform var(--t-fast), background var(--t-fast);
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
}

.chat-widget__telegram-btn {
  background: #229ed9;
  border-color: #1a8bc4;
}

.chat-widget__telegram-btn:hover,
.chat-widget__toggle:hover {
  transform: translateY(-2px);
}

.chat-widget__telegram-btn:active,
.chat-widget__toggle:active {
  transform: scale(0.96);
}

.chat-widget__toggle-icon--close {
  display: none;
}

.chat-widget[data-chat-open="true"] .chat-widget__toggle-icon--open {
  display: none;
}

.chat-widget[data-chat-open="true"] .chat-widget__toggle-icon--close {
  display: block;
}

.chat-widget__panel {
  position: absolute;
  right: 0;
  bottom: calc(56px + 12px);
  display: flex;
  flex-direction: column;
  width: min(360px, calc(100vw - 32px - env(safe-area-inset-left) - env(safe-area-inset-right)));
  max-height: min(520px, calc(100dvh - 120px - env(safe-area-inset-top) - env(safe-area-inset-bottom)));
  background: var(--color-surface-container-lowest);
  border: var(--border-width) solid var(--color-outline-variant);
  box-shadow: 0 16px 48px rgba(26, 23, 20, 0.2);
  overflow: hidden;
}

.chat-widget__panel[hidden] {
  display: none;
}

.chat-widget__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 16px;
  background: var(--color-primary);
  color: var(--color-on-primary);
}

.chat-widget__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
}

.chat-widget__subtitle {
  margin: 4px 0 0;
  font-size: 0.8125rem;
  opacity: 0.9;
}

.chat-widget__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.chat-widget__messages {
  flex: 1 1 auto;
  min-height: 200px;
  max-height: 320px;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px;
  background: var(--color-surface);
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

.chat-widget__form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 16px max(12px, env(safe-area-inset-bottom));
  border-top: var(--border-width) solid var(--color-outline-variant);
  background: var(--color-surface-container-lowest);
}

.chat-widget__input {
  width: 100%;
  padding: 10px 12px;
  border: var(--border-width) solid var(--color-outline-variant);
  background: var(--color-surface);
  color: var(--color-on-surface);
  font-family: inherit;
  font-size: 16px;
  line-height: 1.4;
  border-radius: 0;
  -webkit-appearance: none;
  appearance: none;
}

.chat-widget__input:focus {
  outline: var(--border-width-focus) solid var(--color-primary);
  outline-offset: -2px;
}

.chat-widget__compose {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.chat-widget__textarea {
  flex: 1 1 auto;
  min-height: 44px;
  max-height: 120px;
  resize: none;
  field-sizing: content;
}

.chat-widget__send {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: var(--color-primary);
  color: var(--color-on-primary);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.chat-widget__error {
  margin-top: 8px;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: var(--color-on-error-container);
  background: var(--color-error-container);
}

.chat-message {
  display: flex;
  margin-bottom: 12px;
}

.chat-message--visitor {
  justify-content: flex-end;
}

.chat-message--operator {
  justify-content: flex-start;
}

.chat-message__bubble {
  max-width: 85%;
  padding: 10px 12px;
  background: var(--color-surface-container-high);
  color: var(--color-on-surface);
}

.chat-message--visitor .chat-message__bubble {
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
}

.chat-message__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-message__time {
  display: block;
  margin-top: 4px;
  font-size: 0.6875rem;
  opacity: 0.7;
}

.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;
}

@media (max-width: 767px) {
  .chat-widget__panel {
    position: fixed;
    right: max(8px, env(safe-area-inset-right));
    left: max(8px, env(safe-area-inset-left));
    bottom: max(8px, env(safe-area-inset-bottom));
    width: auto;
    max-height: calc(100dvh - 16px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
  }

  .chat-widget__messages {
    max-height: none;
    min-height: 0;
    flex: 1 1 0;
  }

  .chat-widget[data-chat-open="true"] .chat-widget__actions {
    display: none;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .chat-widget__panel {
    width: min(340px, calc(100vw - 48px));
    max-height: min(480px, calc(100dvh - 100px));
  }
}

@supports not (height: 100dvh) {
  .chat-widget__panel {
    max-height: min(520px, calc(100vh - 120px));
  }

  @media (max-width: 767px) {
    .chat-widget__panel {
      max-height: calc(100vh - 16px);
    }
  }
}