main.support-wrap { display: block; width: 100%; max-width: 900px; margin: 0 auto; padding: 32px 32px 60px; box-sizing: border-box; }
.support-title { font-size: 20px; font-weight: 700; color: var(--c-zinc-950); margin-bottom: 6px; }
.support-desc { font-size: 13px; color: var(--c-zinc-500); margin-bottom: 20px; line-height: 1.6; }

.chat-panel {
  background: var(--c-white);
  border: 1px solid var(--c-zinc-200);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  height: 600px;
  max-height: calc(100vh - 280px);
  min-height: 420px;
  overflow: hidden;
}
.chat-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--c-zinc-100);
  font-size: 12px;
  color: var(--c-zinc-500);
}
.chat-msgs {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--c-zinc-50);
}
.chat-empty {
  text-align: center;
  color: var(--c-zinc-400);
  font-size: 13px;
  margin: auto 0;
  padding: 40px 20px;
  line-height: 1.7;
}
.msg-row { display: block; width: 100%; }
.msg-row.user { text-align: right; }
.msg-row.admin { text-align: left; }
.msg-bubble {
  display: inline-block;
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  text-align: left;
}
.msg-row.user .msg-bubble {
  background: var(--c-zinc-900);
  color: var(--c-white);
  border-bottom-right-radius: 4px;
}
.msg-row.admin .msg-bubble {
  background: var(--c-white);
  color: var(--c-zinc-950);
  border: 1px solid var(--c-zinc-200);
  border-bottom-left-radius: 4px;
}
.msg-meta {
  font-size: 10px;
  color: var(--c-zinc-400);
  margin-top: 4px;
}
.msg-row.user .msg-meta { text-align: right; }
.msg-sender-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--c-zinc-500);
  margin-bottom: 4px;
}

.chat-input-area {
  border-top: 1px solid var(--c-zinc-100);
  padding: 12px;
  background: var(--c-white);
}
.chat-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}
.chat-input {
  flex: 1;
  border: 1px solid var(--c-zinc-200);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
  font-family: inherit;
  resize: none;
  outline: none;
  min-height: 44px;
  max-height: 160px;
  line-height: 1.5;
}
.chat-input:focus { border-color: var(--c-zinc-400); }
.chat-send-btn {
  border: none;
  background: var(--c-zinc-900);
  color: var(--c-white);
  border-radius: 10px;
  padding: 0 16px;
  height: 44px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.chat-send-btn:hover { background: var(--c-zinc-700); }
.chat-send-btn:disabled { opacity: .4; cursor: default; }
.chat-hint {
  font-size: 11px;
  color: var(--c-zinc-400);
  margin-top: 6px;
}
.chat-error {
  background: var(--c-red-50);
  border: 1px solid var(--c-red-200);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--c-red-600);
  margin-bottom: 10px;
}

.toast { position:fixed; bottom:24px; right:24px; background:var(--c-zinc-900); color:var(--c-white); padding:10px 18px; border-radius:8px; font-size:13px; z-index:300; opacity:0; transform:translateY(8px); transition:opacity .2s,transform .2s; pointer-events:none; }
.toast.show { opacity:1; transform:translateY(0); }