:root {
  --mastera-chat-bg: #070711;
  --mastera-chat-panel: rgba(15, 15, 28, 0.96);
  --mastera-chat-panel-strong: rgba(22, 22, 38, 0.98);
  --mastera-chat-border: rgba(255, 255, 255, 0.12);
  --mastera-chat-text: #f8fafc;
  --mastera-chat-muted: #a1a1aa;
  --mastera-chat-soft: #d4d4d8;
  --mastera-chat-violet: #8b5cf6;
  --mastera-chat-pink: #ec4899;
  --mastera-chat-green: #34d399;
  --mastera-chat-input-max-height: 136px;
  --mastera-chat-shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
}

.mastera-chat-widget,
.mastera-chat-widget * {
  box-sizing: border-box;
}

.mastera-chat-widget {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 2147483000;
  color: var(--mastera-chat-text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.mastera-chat-widget[hidden] {
  display: none !important;
}

.mastera-chat-bubble {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background:
    radial-gradient(circle at 35% 20%, rgba(255, 255, 255, 0.24), transparent 30%),
    linear-gradient(135deg, var(--mastera-chat-violet), var(--mastera-chat-pink));
  box-shadow: 0 18px 45px rgba(139, 92, 246, 0.34), var(--mastera-chat-shadow);
  color: white;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.mastera-chat-bubble:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 52px rgba(236, 72, 153, 0.28), var(--mastera-chat-shadow);
}

.mastera-chat-bubble:focus-visible,
.mastera-chat-close:focus-visible,
.mastera-chat-send:focus-visible,
.mastera-chat-tool-button:focus-visible,
.mastera-chat-input:focus-visible {
  outline: 3px solid rgba(52, 211, 153, 0.52);
  outline-offset: 3px;
}

.mastera-chat-icon {
  width: 26px;
  height: 26px;
}

.mastera-chat-badge {
  position: absolute;
  top: -5px;
  right: -5px;
  min-width: 21px;
  height: 21px;
  padding: 0 6px;
  border: 2px solid var(--mastera-chat-bg);
  border-radius: 999px;
  background: var(--mastera-chat-green);
  color: #03140f;
  font-size: 12px;
  font-weight: 800;
  line-height: 17px;
  text-align: center;
}

.mastera-chat-badge[hidden] {
  display: none !important;
}

.mastera-chat-panel {
  position: absolute;
  right: 0;
  bottom: 74px;
  display: flex;
  width: min(380px, calc(100vw - 32px));
  height: min(560px, calc(100vh - 112px));
  min-height: 390px;
  overflow: hidden;
  border: 1px solid var(--mastera-chat-border);
  border-radius: 24px;
  background:
    radial-gradient(circle at 12% 0%, rgba(139, 92, 246, 0.28), transparent 34%),
    radial-gradient(circle at 95% 10%, rgba(236, 72, 153, 0.18), transparent 28%),
    linear-gradient(180deg, var(--mastera-chat-panel), var(--mastera-chat-bg));
  box-shadow: var(--mastera-chat-shadow);
  backdrop-filter: blur(18px);
  transform: translateY(10px) scale(0.98);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.mastera-chat-widget.is-open .mastera-chat-panel {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

.mastera-chat-shell {
  display: flex;
  flex: 1;
  min-width: 0;
  flex-direction: column;
}

.mastera-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 18px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.mastera-chat-brand {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.mastera-chat-mark {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 12px;
  background:
    radial-gradient(circle at 35% 25%, rgba(255, 255, 255, 0.72), transparent 18%),
    linear-gradient(135deg, var(--mastera-chat-violet), var(--mastera-chat-pink));
  box-shadow: 0 10px 26px rgba(139, 92, 246, 0.35);
}

.mastera-chat-title {
  margin: 0;
  color: white;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0;
}

.mastera-chat-subtitle {
  margin: 3px 0 0;
  color: var(--mastera-chat-muted);
  font-size: 12px;
}

.mastera-chat-close {
  display: inline-flex;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--mastera-chat-soft);
  cursor: pointer;
}

.mastera-chat-close:hover {
  background: rgba(255, 255, 255, 0.11);
  color: white;
}

.mastera-chat-transcript {
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  padding: 16px 16px 12px;
  scroll-behavior: smooth;
}

.mastera-chat-transcript::-webkit-scrollbar {
  width: 10px;
}

.mastera-chat-transcript::-webkit-scrollbar-thumb {
  border: 3px solid transparent;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  background-clip: padding-box;
}

.mastera-chat-empty {
  margin: auto 0;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.045);
  color: var(--mastera-chat-soft);
  font-size: 14px;
  line-height: 1.45;
  text-align: center;
}

.mastera-chat-message {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 86%;
  align-self: flex-start;
}

.mastera-chat-message.is-visitor {
  align-self: flex-end;
}

.mastera-chat-message.is-system {
  max-width: 100%;
  align-self: center;
}

.mastera-chat-message-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-wrap: anywhere;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px 18px 18px 6px;
  background: rgba(255, 255, 255, 0.075);
  color: #f4f4f5;
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.4;
  white-space: pre-wrap;
}

.mastera-chat-message.is-visitor .mastera-chat-message-body {
  border-color: rgba(139, 92, 246, 0.3);
  border-radius: 18px 18px 6px 18px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.92), rgba(236, 72, 153, 0.86));
  color: white;
}

.mastera-chat-message.is-system .mastera-chat-message-body {
  border-color: rgba(52, 211, 153, 0.16);
  border-radius: 16px;
  background: rgba(52, 211, 153, 0.09);
  color: #bbf7d0;
  font-size: 12px;
  text-align: center;
}

.mastera-chat-attachments {
  display: grid;
  gap: 7px;
}

.mastera-chat-attachment {
  display: grid;
  gap: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 14px;
  background: rgba(3, 7, 18, 0.22);
  color: inherit;
  text-decoration: none;
}

.mastera-chat-attachment:hover {
  border-color: rgba(255, 255, 255, 0.24);
}

.mastera-chat-attachment-image-link,
.mastera-chat-attachment-details {
  color: inherit;
  text-decoration: none;
}

.mastera-chat-attachment-image-link {
  display: block;
}

.mastera-chat-attachment-image {
  display: block;
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  background: rgba(3, 7, 18, 0.36);
}

.mastera-chat-attachment-audio {
  width: 100%;
  padding: 10px 10px 0;
}

.mastera-chat-attachment-details {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3px 10px;
  align-items: center;
}

.mastera-chat-attachment-label,
.mastera-chat-attachment-meta {
  padding: 9px 10px;
  font-size: 12px;
}

.mastera-chat-attachment-label {
  min-width: 0;
  overflow: hidden;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mastera-chat-attachment-meta {
  color: rgba(244, 244, 245, 0.64);
}

.mastera-chat-meta {
  padding: 0 4px;
  color: rgba(212, 212, 216, 0.66);
  font-size: 11px;
}

.mastera-chat-message.is-visitor .mastera-chat-meta {
  text-align: right;
}

.mastera-chat-composer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: end;
  gap: 10px;
  padding: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  background: var(--mastera-chat-panel-strong);
}

.mastera-chat-tools {
  display: flex;
  align-items: center;
  gap: 6px;
}

.mastera-chat-tool-button {
  position: relative;
  display: inline-flex;
  width: 38px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.065);
  color: rgba(244, 244, 245, 0.88);
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.mastera-chat-tool-button:hover {
  border-color: rgba(52, 211, 153, 0.3);
  background: rgba(52, 211, 153, 0.1);
  transform: translateY(-1px);
}

.mastera-chat-tool-button[data-tooltip]::after {
  position: absolute;
  bottom: calc(100% + 9px);
  left: 0;
  width: 205px;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  background: rgba(3, 7, 18, 0.94);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.32);
  color: rgba(244, 244, 245, 0.92);
  content: attr(data-tooltip);
  font-size: 12px;
  line-height: 1.35;
  opacity: 0;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 140ms ease, transform 140ms ease;
  white-space: normal;
  z-index: 2;
}

.mastera-chat-tool-button[data-tooltip]:hover::after,
.mastera-chat-tool-button[data-tooltip]:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.mastera-chat-tool-button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.mastera-chat-tool-button[hidden],
.mastera-chat-file-input {
  display: none !important;
}

.mastera-chat-input {
  width: 100%;
  min-height: 44px;
  max-height: var(--mastera-chat-input-max-height);
  overflow-y: hidden;
  resize: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(3, 7, 18, 0.64);
  color: var(--mastera-chat-text);
  font: inherit;
  font-size: 14px;
  line-height: 1.35;
  padding: 12px 13px;
  scrollbar-color: rgba(148, 163, 184, 0.42) rgba(15, 23, 42, 0.5);
  scrollbar-width: thin;
}

.mastera-chat-input.is-scrollable {
  overflow-y: auto;
}

.mastera-chat-input::-webkit-scrollbar {
  width: 9px;
}

.mastera-chat-input::-webkit-scrollbar-track {
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.42);
}

.mastera-chat-input::-webkit-scrollbar-thumb {
  border: 2px solid rgba(3, 7, 18, 0.76);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.78), rgba(236, 72, 153, 0.72));
  background-clip: padding-box;
}

.mastera-chat-input::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(167, 139, 250, 0.9), rgba(244, 114, 182, 0.86));
  background-clip: padding-box;
}

.mastera-chat-input::placeholder {
  color: rgba(212, 212, 216, 0.58);
}

.mastera-chat-send {
  display: inline-flex;
  width: 46px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--mastera-chat-violet), var(--mastera-chat-pink));
  color: white;
  cursor: pointer;
  transition: filter 160ms ease, transform 160ms ease;
}

.mastera-chat-send:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.mastera-chat-send:disabled,
.mastera-chat-input:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.mastera-chat-status {
  grid-column: 1 / -1;
  min-height: 16px;
  color: var(--mastera-chat-muted);
  font-size: 12px;
}

@media (max-width: 520px) {
  .mastera-chat-widget {
    right: max(12px, env(safe-area-inset-right));
    bottom: max(12px, env(safe-area-inset-bottom));
  }

  .mastera-chat-panel {
    right: 0;
    bottom: 68px;
    width: calc(100vw - 24px);
    height: min(620px, calc(100vh - 92px));
    min-height: 360px;
    border-radius: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mastera-chat-bubble,
  .mastera-chat-panel,
  .mastera-chat-send,
  .mastera-chat-tool-button {
    transition: none;
  }
}