/* HSKPilot · "Hỏi Pi" chat widget */
.pi-chat{--ink:#1C1A33;--blue:#3D5AFE;--lime:#B8F04A;--pink:#FF4FA3;position:fixed;right:20px;bottom:20px;z-index:60;font-family:'Be Vietnam Pro',system-ui,sans-serif;color:var(--ink)}
.pi-chat [hidden]{display:none!important}
.pi-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.pi-fab{display:flex;align-items:center;gap:10px;height:64px;padding:0 20px 0 8px;border-radius:999px;border:2.5px solid var(--ink);background:var(--lime);box-shadow:0 5px 0 var(--ink);cursor:pointer;font-family:'Baloo 2',system-ui,sans-serif;font-weight:800;font-size:18px;color:var(--ink);transition:transform .1s,box-shadow .1s}
.pi-fab:hover{transform:translateY(-2px);box-shadow:0 7px 0 var(--ink)}
.pi-fab:active{transform:translateY(3px);box-shadow:0 2px 0 var(--ink)}
.pi-fab:focus-visible,.pi-x:focus-visible,.pi-send:focus-visible,.pi-chip:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.pi-fab-face{width:48px;height:48px;border-radius:50%;background:#fff;border:2.5px solid var(--ink);display:grid;place-items:center;overflow:hidden}
.pi-fab-face svg{width:40px;height:36px}
.pi-chat.is-open .pi-fab{display:none}
.pi-panel{position:absolute;right:0;bottom:0;width:380px;height:min(600px,calc(100vh - 40px));display:flex;flex-direction:column;background:#fff;border:2.5px solid var(--ink);border-radius:26px;box-shadow:8px 8px 0 var(--ink);overflow:hidden;animation:pi-pop .25s cubic-bezier(.2,1.4,.4,1)}
@keyframes pi-pop{from{opacity:0;transform:translateY(16px) scale(.96)}to{opacity:1;transform:none}}
.pi-head{display:flex;align-items:center;gap:12px;padding:14px 14px 14px 16px;background:var(--blue);color:#fff;border-bottom:2.5px solid var(--ink)}
.pi-ava{width:44px;height:44px;border-radius:50%;background:#fff;border:2.5px solid var(--ink);display:grid;place-items:center;flex:none;overflow:hidden}
.pi-ava svg{width:36px;height:32px}
.pi-ava.sm{width:32px;height:32px;border-width:2px}
.pi-ava.sm svg{width:26px;height:24px}
.pi-meta{flex:1 1 auto;min-width:0}
.pi-title{font-family:'Baloo 2',system-ui,sans-serif;font-weight:800;font-size:18px;line-height:1.1}
.pi-status{display:flex;align-items:center;gap:6px;font-size:12.5px;color:#E3E8FF}
.pi-dot{width:8px;height:8px;border-radius:50%;background:var(--lime)}
.pi-x{width:40px;height:40px;border-radius:12px;border:2px solid #fff;background:transparent;color:#fff;display:grid;place-items:center;cursor:pointer}
.pi-log{flex:1 1 auto;overflow-y:auto;padding:16px 14px;display:flex;flex-direction:column;gap:12px;background:#F4F3FF}
.pi-row{display:flex;gap:8px;align-items:flex-end;max-width:100%}
.pi-row.is-me{justify-content:flex-end}
.pi-bubble{max-width:82%;padding:10px 14px;border-radius:18px;border:2px solid var(--ink);font-size:14.5px;line-height:1.55;background:#fff;word-wrap:break-word}
.is-pi .pi-bubble{border-bottom-left-radius:6px}
.is-me .pi-bubble{background:var(--ink);color:#fff;border-bottom-right-radius:6px}
.pi-bubble b{font-weight:800}
.pi-link{display:inline-block;margin:6px 8px 0 0;font-weight:800;color:#2F47E0;text-decoration:none}
.pi-link:hover{text-decoration:underline}
.pi-hz{font-family:'Noto Sans SC','PingFang SC',sans-serif;font-weight:700}
.pi-big{font-size:26px;vertical-align:-3px}
.pi-py{color:#4A4766;font-weight:600}
.pi-word{display:grid;grid-template-columns:auto 1fr auto;grid-template-areas:"hz py say" "hz vi say";column-gap:12px;align-items:center;margin-top:8px;padding:8px 10px;border-radius:12px;background:#F4F3FF;border:1.5px solid #E4E1F5}
.pi-word .pi-hz{grid-area:hz;font-size:26px}
.pi-word .pi-py{grid-area:py;font-size:13px}
.pi-word .pi-vi{grid-area:vi;font-size:14px;font-weight:700}
.pi-say{grid-area:say;width:36px;height:36px;border-radius:10px;border:2px solid var(--ink);background:#fff;cursor:pointer;font-size:15px}
.pi-typing{display:inline-flex;gap:4px;padding:4px 2px}
.pi-typing i{width:7px;height:7px;border-radius:50%;background:#77739A;animation:pi-b 1s infinite}
.pi-typing i:nth-child(2){animation-delay:.15s}.pi-typing i:nth-child(3){animation-delay:.3s}
@keyframes pi-b{0%,80%,100%{transform:translateY(0);opacity:.5}40%{transform:translateY(-5px);opacity:1}}
.pi-chips{display:flex;gap:8px;overflow-x:auto;padding:10px 14px 4px;background:#fff;scrollbar-width:none}
.pi-chips:empty{display:none}
.pi-chip{flex:none;height:36px;padding:0 14px;border-radius:999px;border:2px solid var(--ink);background:#fff;font:inherit;font-size:13.5px;font-weight:700;color:var(--ink);cursor:pointer;white-space:nowrap}
.pi-chip:hover{background:var(--lime)}
.pi-form{display:flex;gap:8px;padding:10px 12px;background:#fff;border-top:2px solid #F1F0FA}
.pi-input{flex:1 1 auto;min-width:0;height:48px;padding:0 14px;border-radius:14px;border:2.5px solid var(--ink);font:inherit;font-size:16px;color:var(--ink);background:#fff}
.pi-input:focus{outline:3px solid var(--blue);outline-offset:1px}
.pi-send{width:48px;height:48px;border-radius:14px;border:2.5px solid var(--ink);background:var(--blue);color:#fff;display:grid;place-items:center;cursor:pointer;box-shadow:0 3px 0 var(--ink)}
.pi-foot{padding:0 14px 10px;font-size:11px;line-height:1.4;color:#4A4766;background:#fff}
@media (max-width: 520px){
  .pi-chat{right:14px;bottom:14px}
  .pi-fab{height:58px;padding:0 16px 0 6px;font-size:16px}
  .pi-fab-face{width:44px;height:44px}
  .pi-chat.is-open{inset:0}
  .pi-panel{position:fixed;inset:0;width:auto;height:auto;border-radius:0;border:0;box-shadow:none}
}
@media (prefers-reduced-motion: reduce){.pi-panel,.pi-typing i{animation:none}}
/* phones: compact round Pi button so it covers less of the page */
@media (max-width: 640px){
  .pi-fab{width:60px;height:60px;padding:0;justify-content:center}
  .pi-fab-label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .pi-fab-face{width:48px;height:48px}
  .pi-chat{right:calc(14px + env(safe-area-inset-right, 0px));bottom:calc(14px + env(safe-area-inset-bottom, 0px))}
}