:root {
  --cal-primary: #117a65;
  --cal-primary-dark: #0b5345;
  --cal-accent: #d35400;
  --cal-bg: #ffffff;
  --cal-body-bg: #f4f7f9;
  --cal-surface-bg: #f8fafc;
  --cal-text: #17202a;
  --cal-muted: #6b7280;
  --cal-border: #d9dee5;
  --cal-link: #0f766e;
  --cal-message-bg: #ffffff;
  --cal-client-message-bg: #e6f4f1;
  --cal-input-bg: #ffffff;
  --cal-font-family: Arial, Helvetica, sans-serif;
  --cal-font-size: 14px;
  --cal-radius: 8px;
  --cal-message-radius: 8px;
  --cal-space: 14px;
  --cal-panel-margin: 18px;
}

.cal-chat-button,
.cal-chat-panel,
.cal-chat-panel * {
  box-sizing: border-box;
  font-family: var(--cal-font-family);
}

.cal-chat-button {
  position: fixed;
  right: var(--cal-panel-margin);
  bottom: var(--cal-panel-margin);
  z-index: 99998;
  width: 58px;
  height: 58px;
  border: 0;
  border-radius: 50%;
  background: var(--cal-primary);
  color: #fff;
  box-shadow: 0 12px 24px rgba(17, 24, 39, 0.22);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform 160ms ease, background 160ms ease;
}

.cal-chat-button:hover,
.cal-chat-button:focus {
  background: var(--cal-primary-dark);
  transform: translateY(-1px);
}

.cal-chat-button span {
  display: block;
  width: 24px;
  height: 18px;
  border: 2px solid #fff;
  border-radius: 8px;
  position: relative;
}

.cal-chat-button span::after {
  content: "";
  position: absolute;
  right: 3px;
  bottom: -7px;
  width: 9px;
  height: 9px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-25deg);
  background: var(--cal-primary);
}

.cal-chat-panel {
  position: fixed;
  right: var(--cal-panel-margin);
  bottom: calc(var(--cal-panel-margin) + 70px);
  z-index: 99999;
  width: min(380px, calc(100vw - 28px));
  height: min(620px, calc(100vh - 110px));
  background: var(--cal-bg);
  color: var(--cal-text);
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius);
  box-shadow: 0 22px 48px rgba(17, 24, 39, 0.24);
  display: none;
  overflow: hidden;
  font-size: var(--cal-font-size);
}

.cal-chat-panel.is-open {
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.cal-chat-panel.is-inline {
  position: static;
  right: auto;
  bottom: auto;
  z-index: auto;
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: min(720px, 100%);
  height: auto;
  min-height: 520px;
  max-height: none;
  margin: var(--cal-panel-margin) 0;
  box-shadow: none;
}

.cal-chat-panel.is-inline .cal-chat-close {
  display: none;
}

.cal-chat-panel.is-inline .cal-chat-body {
  min-height: 320px;
}

.cal-chat-header {
  padding: var(--cal-space) 16px;
  background: var(--cal-surface-bg);
  border-bottom: 1px solid var(--cal-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.cal-chat-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.cal-chat-title {
  min-width: 0;
}

.cal-chat-title strong {
  display: block;
  font-size: 15px;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.cal-chat-title small {
  display: block;
  color: var(--cal-muted);
  font-size: 12px;
  margin-top: 2px;
}

.cal-chat-close,
.cal-chat-new {
  width: 34px;
  height: 34px;
  border: 1px solid var(--cal-border);
  background: var(--cal-input-bg);
  border-radius: calc(var(--cal-radius) - 2px);
  color: var(--cal-text);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

.cal-chat-new {
  display: none;
  width: auto;
  min-width: 0;
  padding: 0 9px;
  font-size: 12px;
  font-weight: 700;
}

.cal-chat-panel.has-conversation .cal-chat-new {
  display: inline-flex;
  align-items: center;
}

.cal-chat-body {
  overflow-y: auto;
  padding: var(--cal-space);
  background: var(--cal-body-bg);
}

.cal-chat-form {
  display: grid;
  gap: 10px;
}

.cal-chat-field {
  display: grid;
  gap: 5px;
}

.cal-chat-field label,
.cal-chat-terms {
  font-size: 12px;
  color: var(--cal-muted);
}

.cal-chat-field input,
.cal-chat-field select,
.cal-chat-field textarea {
  width: 100%;
  border: 1px solid var(--cal-border);
  border-radius: calc(var(--cal-radius) - 2px);
  background: var(--cal-input-bg);
  color: var(--cal-text);
  padding: 10px;
  font-size: var(--cal-font-size);
  outline: none;
}

.cal-chat-field textarea {
  min-height: 92px;
  resize: vertical;
}

.cal-chat-field input:focus,
.cal-chat-field select:focus,
.cal-chat-field textarea:focus {
  border-color: var(--cal-primary);
  box-shadow: 0 0 0 3px rgba(17, 122, 101, 0.15);
}

.cal-chat-terms {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.cal-chat-submit,
.cal-chat-send {
  border: 0;
  border-radius: calc(var(--cal-radius) - 2px);
  background: var(--cal-primary);
  color: #fff;
  font-weight: 700;
  padding: 11px 14px;
  cursor: pointer;
}

.cal-chat-submit:hover,
.cal-chat-send:hover {
  background: var(--cal-primary-dark);
}

.cal-chat-submit:disabled,
.cal-chat-send:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.cal-chat-messages {
  display: grid;
  gap: 9px;
}

.cal-chat-message {
  max-width: 84%;
  padding: 10px 12px;
  border-radius: var(--cal-message-radius);
  background: var(--cal-message-bg);
  border: 1px solid var(--cal-border);
  line-height: 1.35;
  font-size: var(--cal-font-size);
  overflow-wrap: anywhere;
}

.cal-chat-message a {
  color: var(--cal-link);
  font-weight: 700;
}

.cal-chat-message small {
  display: block;
  color: var(--cal-muted);
  font-size: 11px;
  margin-top: 5px;
}

.cal-chat-message.is-client {
  margin-left: auto;
  background: var(--cal-client-message-bg);
  border-color: #b7e1d9;
}

.cal-chat-message.is-system {
  border-left: 4px solid var(--cal-accent);
}

.cal-chat-message.is-deleted {
  color: var(--cal-muted);
  font-style: italic;
}

.cal-chat-message-actions {
  display: flex;
  gap: 6px;
  margin-top: 7px;
}

.cal-chat-message-actions button {
  min-height: 28px;
  border: 1px solid var(--cal-border);
  border-radius: calc(var(--cal-radius) - 2px);
  background: var(--cal-input-bg);
  color: var(--cal-text);
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.cal-chat-composer {
  display: none;
  border-top: 1px solid var(--cal-border);
  padding: 10px;
  gap: 8px;
  background: var(--cal-input-bg);
  grid-template-columns: 1fr auto auto;
  align-items: end;
}

.cal-chat-panel.has-conversation .cal-chat-composer {
  display: grid;
}

.cal-chat-composer textarea {
  min-height: 42px;
  max-height: 120px;
  resize: vertical;
  border: 1px solid var(--cal-border);
  border-radius: calc(var(--cal-radius) - 2px);
  padding: 10px;
  font-size: var(--cal-font-size);
  background: var(--cal-input-bg);
  color: var(--cal-text);
}

.cal-chat-file-tools,
.cal-chat-attachment-control {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.cal-chat-file-tools {
  max-width: 145px;
}

.cal-chat-file-input,
.cal-chat-attachment-control input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.cal-chat-file-button {
  border: 1px solid var(--cal-border);
  border-radius: calc(var(--cal-radius) - 2px);
  background: var(--cal-input-bg);
  color: var(--cal-text);
  min-height: 38px;
  padding: 8px 10px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}

.cal-chat-file-name,
.cal-chat-attachment-control span {
  color: var(--cal-muted);
  font-size: 11px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cal-chat-attachment {
  display: grid;
  gap: 6px;
}

.cal-chat-attachment img,
.cal-chat-attachment video {
  display: block;
  max-width: min(240px, 100%);
  border-radius: calc(var(--cal-message-radius) - 2px);
  border: 1px solid var(--cal-border);
  background: var(--cal-input-bg);
}

.cal-chat-attachment video {
  width: min(260px, 100%);
}

.cal-chat-error {
  color: #b42318;
  background: #fff1f0;
  border: 1px solid #ffd5d2;
  border-radius: calc(var(--cal-radius) - 2px);
  padding: 9px;
  font-size: 13px;
}

@media (max-width: 520px) {
  .cal-chat-panel {
    right: 10px;
    bottom: 78px;
    width: calc(100vw - 20px);
    height: min(620px, calc(100vh - 90px));
  }

  .cal-chat-button {
    right: 12px;
    bottom: 12px;
  }

  .cal-chat-composer {
    grid-template-columns: 1fr;
  }

  .cal-chat-file-tools {
    max-width: none;
    justify-content: space-between;
  }
}