#costech-chat-widget-root, #costech-chat-widget-root * { box-sizing: border-box; }
#costech-chat-launcher { position: fixed; z-index: 99998; right: 22px; bottom: 22px; min-height: 52px; padding: 0 20px; border: 0; border-radius: 28px; background: #1769aa; color: #fff; box-shadow: 0 5px 20px #102a4338; font: 600 15px/1.2 "Yu Gothic UI", Meiryo, sans-serif; cursor: pointer; }
#costech-chat-launcher:hover { background: #125b96; }
#costech-chat-panel { position: fixed; z-index: 99999; right: 22px; bottom: 86px; display: flex; flex-direction: column; width: min(390px, calc(100vw - 28px)); height: min(590px, calc(100vh - 112px)); overflow: hidden; border: 1px solid #dce3ec; border-radius: 16px; background: #fff; color: #1f2937; box-shadow: 0 12px 36px #18324d30; font-family: "Yu Gothic UI", Meiryo, sans-serif; }
#costech-chat-panel[hidden] { display: none; }
#costech-chat-panel .ccw-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 17px; background: #173b5e; color: #fff; }
#costech-chat-panel .ccw-header strong, #costech-chat-panel .ccw-header span { display: block; }
#costech-chat-panel .ccw-header strong { font-size: 16px; }
#costech-chat-panel .ccw-header span { margin-top: 4px; color: #d8e4ef; font-size: 12px; }
#costech-chat-panel #costech-chat-close { width: 36px; height: 36px; flex: 0 0 36px; border: 0; border-radius: 50%; background: #ffffff20; color: #fff; font: 28px/1 Arial, sans-serif; cursor: pointer; }
#costech-chat-panel .ccw-notice { padding: 9px 15px; background: #f0f7ff; color: #46627e; font-size: 11px; line-height: 1.5; }
#costech-chat-panel .ccw-messages { flex: 1; min-height: 0; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
#costech-chat-panel .ccw-bubble { max-width: 90%; padding: 10px 12px; border-radius: 13px; line-height: 1.65; font-size: 13px; white-space: pre-wrap; overflow-wrap: anywhere; }
#costech-chat-panel .ccw-bot { align-self: flex-start; border-bottom-left-radius: 4px; background: #f0f3f7; }
#costech-chat-panel .ccw-bot a { color: #1769aa; text-decoration: underline; overflow-wrap: anywhere; }
#costech-chat-panel .ccw-user { align-self: flex-end; border-bottom-right-radius: 4px; background: #dceeff; }
#costech-chat-panel .ccw-form { display: flex; gap: 8px; padding: 11px 12px; border-top: 1px solid #e7ebf0; }
#costech-chat-panel .ccw-form input { flex: 1; min-width: 0; padding: 10px 11px; border: 1px solid #cbd5e1; border-radius: 9px; color: #1f2937; font: inherit; font-size: 16px; }
#costech-chat-panel .ccw-form button { padding: 0 14px; border: 0; border-radius: 9px; background: #1769aa; color: #fff; font: inherit; font-size: 13px; font-weight: 600; cursor: pointer; }
#costech-chat-panel .ccw-foot { padding: 0 12px 10px; color: #8290a0; font-size: 10px; text-align: center; }
@media (max-width: 540px) {
  #costech-chat-launcher { right: 14px; bottom: 14px; min-height: 48px; }
  #costech-chat-panel { right: 10px; bottom: 72px; width: calc(100vw - 20px); height: min(72vh, 620px); border-radius: 14px; }
}