.support-chat-root {
  --support-chat-user-bg: #2563eb;
  --support-chat-user-text: #ffffff;
  --support-chat-staff-bg: var(--bg-elevated, var(--surface));
  --support-chat-staff-text: var(--text);
  --support-chat-staff-border: var(--border);

  position: fixed;
  right: max(16px, env(safe-area-inset-right, 0px));
  bottom: max(16px, env(safe-area-inset-bottom, 0px));
  z-index: 1200;
  font-family: inherit;
  color: var(--text);
}

[data-theme="dark"] .support-chat-root {
  --support-chat-staff-bg: #243041;
  --support-chat-staff-text: #eef2f7;
  --support-chat-staff-border: #3d4f63;
}

.support-chat-toggle {
  position: relative;
  width: 56px;
  height: 56px;
  border: 0;
  border-radius: 999px;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow:
    0 10px 28px rgba(37, 99, 235, 0.35),
    0 2px 8px rgba(15, 23, 42, 0.12);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.support-chat-toggle:hover {
  transform: translateY(-1px);
  box-shadow:
    0 14px 32px rgba(37, 99, 235, 0.42),
    0 4px 10px rgba(15, 23, 42, 0.14);
}

.support-chat-toggle svg {
  width: 24px;
  height: 24px;
}

.support-chat-toggle-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  background: #ef4444;
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  line-height: 18px;
  text-align: center;
  box-shadow: 0 0 0 2px #1d4ed8;
}

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

.support-chat-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 12px);
  width: min(360px, calc(100vw - 32px));
  max-height: min(520px, calc(100vh - 120px));
  display: flex;
  flex-direction: column;
  border-radius: 18px;
  overflow: hidden;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg, 0 24px 60px rgba(15, 23, 42, 0.18));
}

.support-chat-panel[hidden] {
  display: none !important;
}

.support-chat-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--border-subtle, var(--border));
  background: var(--bg-elevated, var(--surface));
}

.support-chat-header h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.support-chat-header p {
  margin: 4px 0 0;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--muted);
}

.support-chat-close {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 8px;
}

.support-chat-close:hover {
  background: color-mix(in srgb, var(--text) 8%, transparent);
  color: var(--text);
}

.support-chat-messages {
  flex: 1 1 auto;
  min-height: 180px;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--bg, #f7f7f8);
}

[data-theme="dark"] .support-chat-messages {
  background: color-mix(in srgb, var(--surface) 88%, #000);
}

.support-chat-empty {
  margin: auto;
  text-align: center;
  max-width: 240px;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--muted);
}

.support-chat-bubble {
  max-width: 88%;
  padding: 10px 12px;
  border-radius: 14px;
  font-size: 0.875rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}

.support-chat-bubble-user {
  align-self: flex-end;
  background: var(--support-chat-user-bg);
  color: var(--support-chat-user-text);
  border-bottom-right-radius: 4px;
}

.support-chat-bubble-user .support-chat-bubble-time {
  color: rgba(255, 255, 255, 0.78);
}

.support-chat-bubble-staff {
  align-self: flex-start;
  background: var(--support-chat-staff-bg);
  color: var(--support-chat-staff-text);
  border: 1px solid var(--support-chat-staff-border);
  border-bottom-left-radius: 4px;
}

.support-chat-bubble-system {
  align-self: center;
  max-width: 92%;
  background: color-mix(in srgb, var(--accent, #2563eb) 8%, var(--surface, #fff));
  color: var(--text, #111);
  border: 1px dashed color-mix(in srgb, var(--accent, #2563eb) 35%, transparent);
  border-radius: 12px;
  text-align: center;
  font-size: 0.8125rem;
}

.support-chat-bubble-system .support-chat-bubble-meta {
  color: var(--accent, #2563eb);
}

.support-chat-bubble-staff.is-new {
  animation: support-chat-bubble-in 0.35s var(--ease, ease);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent, #2563eb) 35%, transparent);
}

@keyframes support-chat-bubble-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.support-chat-bubble-meta {
  display: block;
  margin-bottom: 4px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.support-chat-bubble-staff .support-chat-bubble-meta {
  color: var(--accent, #2563eb);
}

.support-chat-bubble-time {
  display: block;
  margin-top: 6px;
  font-size: 0.6875rem;
  color: var(--muted);
}

.support-chat-guest {
  padding: 0 14px 14px;
}

.support-chat-guest p {
  margin: 0 0 12px;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--muted);
}

.support-chat-compose {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px 14px;
  border-top: 1px solid var(--border-subtle, var(--border));
  background: var(--surface);
}

.support-chat-compose-stack {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.support-chat-compose-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.support-chat-attach {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-elevated, var(--surface));
  color: var(--muted);
  display: grid;
  place-items: center;
  cursor: pointer;
}

.support-chat-attach:hover:not(:disabled) {
  color: var(--accent, #2563eb);
  border-color: color-mix(in srgb, var(--accent, #2563eb) 35%, var(--border));
}

.support-chat-attach:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.support-chat-attach svg {
  width: 18px;
  height: 18px;
}

.support-chat-attachment-preview {
  position: relative;
  align-self: flex-start;
  max-width: 160px;
}

.support-chat-attachment-preview img {
  display: block;
  width: 100%;
  max-height: 120px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.support-chat-attachment-remove {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 24px;
  height: 24px;
  border: 0;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.72);
  color: #fff;
  cursor: pointer;
  line-height: 1;
}

.support-chat-bubble-image-link {
  display: block;
  margin-bottom: 6px;
}

.support-chat-bubble-image {
  display: block;
  max-width: min(220px, 100%);
  max-height: 220px;
  border-radius: 10px;
  object-fit: cover;
}

.support-chat-bubble-text {
  display: block;
  white-space: pre-wrap;
  word-break: break-word;
}

.support-chat-compose-row .support-chat-input {
  flex: 1 1 auto;
  min-width: 0;
  resize: vertical;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-elevated, var(--surface));
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
  line-height: 1.4;
  min-height: 42px;
  max-height: 120px;
}

.support-chat-input::placeholder {
  color: var(--muted);
}

.support-chat-input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--accent, #2563eb) 45%, var(--border));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent, #2563eb) 12%, transparent);
}

.support-chat-compose-row .support-chat-send {
  align-self: flex-end;
  border: 0;
  border-radius: 12px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  color: #fff;
  background: #2563eb;
}

.support-chat-send:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.support-chat-error {
  margin: 0 14px 12px;
  font-size: 0.8125rem;
  color: #dc2626;
}

[data-theme="dark"] .support-chat-error {
  color: #f87171;
}

.support-chat-notice {
  margin: 0 14px 12px;
  padding: 0.65rem 0.8rem;
  border-radius: 10px;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--text);
  background: color-mix(in srgb, var(--accent, #2563eb) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent, #2563eb) 18%, var(--border));
}

.support-chat-notice[hidden],
.support-chat-error[hidden] {
  display: none !important;
}

@media (max-width: 480px) {
  .support-chat-panel {
    width: calc(100vw - 24px);
    right: -4px;
  }
}