:root{--ddh-chat-red:#c8102e;--ddh-chat-blue:#0a2f6b;--ddh-chat-light:#f6f8fc;--ddh-chat-ink:#122033}
.ddh-help-button{position:fixed;right:18px;bottom:84px;z-index:9998;border:0;border-radius:999px;background:linear-gradient(135deg,var(--ddh-chat-red),#8f0d24);color:#fff;font-weight:800;font-size:15px;padding:14px 18px;box-shadow:0 12px 32px rgba(0,0,0,.25);cursor:pointer;display:flex;align-items:center;gap:8px}
.ddh-help-button:focus-visible,.ddh-chat-close:focus-visible,.ddh-chat-send:focus-visible,.ddh-chat-chip:focus-visible{outline:3px solid #ffd34d;outline-offset:2px}
.ddh-chat-panel{position:fixed;right:18px;bottom:142px;width:min(390px,calc(100vw - 24px));max-height:min(690px,calc(100vh - 170px));z-index:9999;background:#fff;border-radius:20px;box-shadow:0 24px 70px rgba(3,18,43,.35);overflow:hidden;border:1px solid rgba(10,47,107,.16);display:none;flex-direction:column}
.ddh-chat-panel.open{display:flex}
.ddh-chat-header{background:linear-gradient(135deg,#061b3d,var(--ddh-chat-blue));color:#fff;padding:16px;display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.ddh-chat-header h2{font-size:18px;margin:0 0 3px;color:#fff}.ddh-chat-header p{margin:0;font-size:12px;color:#dce7ff}.ddh-chat-close{border:0;background:rgba(255,255,255,.14);color:#fff;width:36px;height:36px;border-radius:50%;font-size:20px;cursor:pointer}
.ddh-chat-messages{padding:14px;background:var(--ddh-chat-light);overflow-y:auto;min-height:260px;display:flex;flex-direction:column;gap:10px}
.ddh-chat-msg{max-width:88%;padding:11px 13px;border-radius:15px;font-size:14px;line-height:1.45;white-space:pre-wrap}.ddh-chat-msg.bot{align-self:flex-start;background:#fff;border:1px solid #dfe6f2;color:var(--ddh-chat-ink)}.ddh-chat-msg.user{align-self:flex-end;background:var(--ddh-chat-blue);color:#fff}.ddh-chat-msg a{font-weight:800;color:var(--ddh-chat-red)}
.ddh-chat-chips{display:flex;gap:7px;flex-wrap:wrap;padding:10px 14px 0;background:#fff}.ddh-chat-chip{border:1px solid #c9d5e8;background:#fff;color:var(--ddh-chat-blue);border-radius:999px;padding:8px 10px;font-weight:700;font-size:12px;cursor:pointer}
.ddh-chat-form{display:flex;gap:8px;padding:12px 14px;background:#fff;border-top:1px solid #e3e8f1}.ddh-chat-input{flex:1;min-width:0;border:1px solid #b9c5d8;border-radius:12px;padding:11px 12px;font:inherit;font-size:16px}.ddh-chat-send{border:0;border-radius:12px;background:var(--ddh-chat-red);color:#fff;font-weight:800;padding:0 15px;cursor:pointer}.ddh-chat-note{font-size:10px;color:#667085;padding:0 14px 12px;background:#fff}.ddh-chat-status{font-size:11px;color:#667085;padding:0 14px 8px;background:#fff;min-height:16px}
@media(max-width:600px){.ddh-help-button{right:12px;bottom:78px}.ddh-chat-panel{right:12px;bottom:136px;max-height:calc(100vh - 150px)}}
@media(prefers-reduced-motion:no-preference){.ddh-help-button{transition:transform .2s ease}.ddh-help-button:hover{transform:translateY(-2px)}}