/* Experivio: Coach 3.0 (Science Mentor). Built on the Home 3.0 tokens (--h-*): accent, light/dark, density and motion carry over. */
.coach3{--co-ease:cubic-bezier(.22,1,.36,1);--co-r:20px;max-width:1360px;margin:0 auto;color:var(--h-ink)}
.coach3 :focus-visible{outline:3px solid #ffb703;outline-offset:2px}

/* hero: compact, two columns when there is room */
.co-hero{position:relative;overflow:hidden;isolation:isolate;display:grid;grid-template-columns:minmax(0,1fr);gap:12px;align-items:center;padding:clamp(16px,1.4vw + 10px,30px);border-radius:22px;background:var(--h-grad);color:#fff;box-shadow:var(--h-e3);margin:0 0 var(--h-gap)}
.co-hero::before{content:"";position:absolute;inset:-40% -10% auto 45%;height:160%;z-index:-1;pointer-events:none;background:radial-gradient(closest-side,rgba(255,255,255,.16),transparent)}
.co-hero::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(1.2px 1.2px at 12% 30%,rgba(255,255,255,.55),transparent),radial-gradient(1px 1px at 38% 78%,rgba(255,255,255,.4),transparent),radial-gradient(1.4px 1.4px at 62% 18%,rgba(255,255,255,.45),transparent),radial-gradient(1px 1px at 88% 70%,rgba(255,255,255,.4),transparent)}
.co-hero .dz3-eyebrow{color:rgba(255,255,255,.82);margin:0}
.co-hero h1{color:#fff;margin:6px 0 4px;font-size:clamp(23px,1.3vw + 17px,36px);letter-spacing:-.02em;max-width:20ch}
.co-lede{margin:0;color:rgba(255,255,255,.92);max-width:56ch}
.co-hp{display:inline-flex;align-items:center;gap:6px;margin:12px 0 0;padding:5px 12px;border-radius:999px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);font-size:.88rem;font-weight:700;max-width:100%}
.co-hp span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.co-art{display:none;pointer-events:none}
.co-art svg{display:block;max-height:170px;margin-left:auto}
.co-orb{stroke:rgba(255,255,255,.22);stroke-width:1}
.co-net line{stroke:rgba(255,255,255,.4);stroke-width:1.2}
.co-node{fill:#fff;opacity:.9}
.co-core{fill:#fff}
.co-spark{fill:#fff;opacity:.7}
@container main (min-width:720px){.co-hero{grid-template-columns:minmax(0,1.4fr) minmax(200px,.8fr)}.co-art{display:block}}
:root:not([data-motion="off"]) .co-node{animation:conode 3.6s ease-in-out infinite;animation-delay:calc(var(--d) * .5s)}
:root:not([data-motion="off"]) .co-spark{animation:cospark 4.4s ease-in-out infinite;animation-delay:calc(var(--d) * .8s)}
@keyframes conode{0%,100%{opacity:.55}50%{opacity:1}}
@keyframes cospark{0%,100%{opacity:.2}50%{opacity:.85}}

/* layout: conversation first; project context beside it on wide screens, below on phones */
.co-grid{display:grid;gap:var(--h-gap);grid-template-columns:minmax(0,1fr);align-items:start}
@container main (min-width:1100px){.co-grid{grid-template-columns:minmax(0,1fr) minmax(260px,320px)}.co-side{position:sticky;top:16px}}
.coach3 .card.co-main{max-width:none;margin:0;padding:clamp(14px,1.2vw + 8px,24px);border-radius:var(--co-r);background:var(--h-surface);border:1px solid var(--h-line);box-shadow:var(--h-e1)}
.co-side{display:grid;gap:12px;min-width:0}
.co-side .warn{margin:0}

/* mentor identity */
.co-id{display:flex;align-items:center;gap:12px;padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--h-line);flex-wrap:wrap}
.co-idt{flex:1 1 14rem;min-width:0}
.co-id h2{margin:0;font-size:clamp(1.08rem,.4vw + 1rem,1.3rem)}
.co-id p{margin:2px 0 0}
.co-av{flex:none;display:block;border-radius:30%;filter:drop-shadow(0 4px 10px color-mix(in srgb,var(--h-pri) 30%,transparent))}
:root:not([data-motion="off"]) .co-id .co-av{animation:cobreathe 5s ease-in-out infinite}
@keyframes cobreathe{0%,100%{filter:drop-shadow(0 4px 10px color-mix(in srgb,var(--h-pri) 22%,transparent))}50%{filter:drop-shadow(0 4px 16px color-mix(in srgb,var(--h-pri) 46%,transparent))}}
.co-stat{display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;font-size:.84rem;font-weight:700;background:var(--h-surface2);color:var(--h-ink);white-space:nowrap}
.co-sdot{width:8px;height:8px;border-radius:50%;background:var(--h-mut)}
.co-stat.s-ok{background:var(--h-ok-bg);color:var(--h-ok)}.co-stat.s-ok .co-sdot{background:var(--h-ok)}
.co-stat.s-think{background:color-mix(in srgb,var(--h-pri) 14%,var(--h-surface));color:var(--h-pri-ink,var(--h-pri))}.co-stat.s-think .co-sdot{background:var(--h-pri)}
.co-stat.s-off{background:var(--h-bad-bg);color:var(--h-bad)}.co-stat.s-off .co-sdot{background:var(--h-bad)}
:root:not([data-motion="off"]) .co-stat.s-think .co-sdot{animation:conode 1.4s ease-in-out infinite}

/* modes and explanation level */
.co-tools{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;margin:0 0 10px}
.co-seg{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.co-segl{font-size:.84rem;font-weight:700;color:var(--h-mut);margin-right:2px}
.co-chip{margin:0;min-height:36px;padding:0 13px;border-radius:999px;border:1px solid var(--h-line);background:var(--h-surface);color:var(--h-ink);font:inherit;font-size:.88rem;font-weight:600;cursor:pointer;transition:background .18s,border-color .18s,color .18s}
.co-chip:hover{border-color:color-mix(in srgb,var(--h-pri) 40%,var(--h-line))}
.co-chip[aria-pressed="true"]{background:color-mix(in srgb,var(--h-pri) 14%,var(--h-surface));border-color:var(--h-pri);color:var(--h-pri-ink,var(--h-pri))}

/* conversation */
.co-chatwrap{position:relative}
.coach3 .chat.co-chat{border:1px solid var(--h-line);border-radius:18px;padding:12px;background:linear-gradient(180deg,color-mix(in srgb,var(--h-pri) 3%,var(--h-surface)),var(--h-surface) 140px);scroll-behavior:auto}
/* the empty conversation (welcome) is never taller than the conversation it turns into, so the message box doesn't move when chatting starts */
.coach3 .chat.co-chat:not(.full){max-height:clamp(300px,56dvh,760px);min-height:0}
.coach3 .chat.full{height:clamp(300px,56dvh,760px)}
@container main (max-width:520px){.co-sugs .co-sug:nth-child(n+5){display:none}}
.coach3 .m{display:flex;gap:8px;align-items:flex-start;padding:0;margin:10px 0;background:none;white-space:normal;width:fit-content;max-width:min(94%,760px)}
.coach3 .m.u{justify-content:flex-end;color:inherit;margin-left:auto}
.coach3 .m .co-bub{min-width:0;max-width:100%;padding:10px 14px;border-radius:16px;line-height:1.55;overflow-wrap:anywhere}
.coach3 .m.u .co-bub{background:var(--h-grad);color:#fff;border-bottom-right-radius:6px;white-space:pre-wrap;box-shadow:0 4px 12px color-mix(in srgb,var(--h-pri) 25%,transparent)}
.coach3 .m.a .co-bub{background:var(--h-surface2);border:1px solid var(--h-line);border-top-left-radius:6px}
.coach3 .m.a.co-err .co-bub{background:var(--h-bad-bg);border-color:color-mix(in srgb,var(--h-bad) 35%,var(--h-line))}
.coach3 .m .co-av{margin-top:2px}
:root:not([data-motion="off"]) .coach3 .m{animation:comsg .26s var(--co-ease) both}
@keyframes comsg{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.co-body>:first-child{margin-top:0}.co-body>:last-child{margin-bottom:0}
.co-body p{margin:0 0 8px}
.co-body h4{margin:12px 0 4px;font-size:.98rem}
.co-body ul,.co-body ol{margin:4px 0 8px;padding-left:1.3em}.co-body li{margin:3px 0}
.co-body code{font-size:.9em;padding:1px 5px;border-radius:6px;background:color-mix(in srgb,var(--h-pri) 10%,var(--h-surface))}
.co-code{margin:8px 0;padding:10px 12px;border-radius:12px;background:var(--h-surface);border:1px solid var(--h-line);overflow:auto;font-size:.88rem}
.co-code code{padding:0;background:none}
.co-tbl{overflow:auto;margin:8px 0;border:1px solid var(--h-line);border-radius:12px;background:var(--h-surface)}
.co-tbl table{border-collapse:collapse;width:100%;font-size:.9rem}.co-tbl th,.co-tbl td{padding:6px 10px;border-bottom:1px solid var(--h-line);text-align:left}.co-tbl th{background:var(--h-surface2)}
.co-body sup,.co-body sub{font-size:.72em;line-height:0}
/* typing indicator: soft pulses while a real request is pending */
.co-dots{display:inline-flex;align-items:center;gap:5px;min-height:22px}
.co-dots i{width:7px;height:7px;border-radius:50%;background:var(--h-pri);opacity:.35}
.co-dots::after{content:attr(data-l) "…";margin-left:6px;font-size:.88rem;color:var(--h-mut)}
:root:not([data-motion="off"]) .co-dots i{animation:codot 1.4s ease-in-out infinite}
.co-dots i:nth-child(2){animation-delay:.2s!important}.co-dots i:nth-child(3){animation-delay:.4s!important}
@keyframes codot{0%,100%{opacity:.3}50%{opacity:1}}
.co-live:empty{display:none}.co-live{white-space:pre-wrap}
/* answer actions and follow-ups */
.co-acts{display:flex;flex-wrap:wrap;gap:4px;margin:8px 0 0}
.co-act{display:inline-flex;align-items:center;gap:5px;margin:0;min-height:40px;padding:0 9px;border-radius:9px;border:1px solid transparent;background:transparent;color:var(--h-mut);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:background .16s,color .16s,border-color .16s}
.co-act:hover{background:var(--h-surface);color:var(--h-pri-ink,var(--h-pri));border-color:var(--h-line)}
.co-act.done{color:var(--h-ok)}
.co-fu{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.co-fuq{display:inline-flex;align-items:center;gap:6px;margin:0;min-height:36px;padding:6px 12px;border-radius:12px;border:1px solid color-mix(in srgb,var(--h-pri) 30%,var(--h-line));background:var(--h-surface);color:var(--h-ink);font:inherit;font-size:.86rem;text-align:left;cursor:pointer}
.co-fuq:hover{background:color-mix(in srgb,var(--h-pri) 8%,var(--h-surface))}
.co-jump{position:absolute;left:50%;bottom:12px;transform:translateX(-50%);display:inline-flex;align-items:center;gap:6px;margin:0;min-height:36px;padding:0 14px;border-radius:999px;border:1px solid var(--h-line);background:var(--h-surface);color:var(--h-ink);box-shadow:var(--h-e2);font:inherit;font-size:.86rem;font-weight:700;cursor:pointer}
.co-jump .ic{transform:rotate(180deg)}
.co-jump[hidden]{display:none}

/* welcome (empty conversation only; folds away after the first question) */
.co-welcome{padding:6px 4px 4px}
.co-wh{display:flex;gap:12px;align-items:center;margin:4px 0 12px}
.co-wh h2{margin:0;font-size:clamp(1.12rem,.5vw + 1rem,1.4rem)}
.co-wh p{margin:2px 0 0}
.co-sugs{display:grid;gap:8px;grid-template-columns:minmax(0,1fr)}
@container main (min-width:640px){.co-sugs{grid-template-columns:repeat(2,minmax(0,1fr))}}
@container main (min-width:1400px){.co-sugs{grid-template-columns:repeat(3,minmax(0,1fr))}}
.co-sug{display:flex;align-items:center;gap:10px;margin:0;min-height:52px;padding:10px 12px;border-radius:14px;border:1px solid var(--h-line);background:var(--h-surface);color:var(--h-ink);font:inherit;font-size:.92rem;font-weight:600;text-align:left;cursor:pointer;transition:transform .18s var(--co-ease),box-shadow .18s,border-color .18s}
.co-sug:not(:disabled):hover{transform:translateY(-2px);box-shadow:var(--h-e2);border-color:color-mix(in srgb,var(--h-pri) 35%,var(--h-line))}
.co-sug:disabled{opacity:.6;cursor:not-allowed}
.co-sugic{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:color-mix(in srgb,var(--h-pri) 12%,var(--h-surface));color:var(--h-pri)}
.coach3 .coachsug{display:block}

/* composer */
.coach3 .askbar.co-composer{display:flex;align-items:flex-end;gap:8px;margin-top:12px;padding:6px 6px 6px 14px;border:1px solid var(--h-line);border-radius:18px;background:var(--h-surface);transition:border-color .18s,box-shadow .18s;scroll-margin-bottom:calc(var(--navh,64px) + 16px + env(safe-area-inset-bottom,0px))}
.coach3 .co-composer:focus-within{border-color:var(--h-pri);box-shadow:0 0 0 4px color-mix(in srgb,var(--h-pri) 18%,transparent)}
.coach3 .co-composer textarea{flex:1 1 auto;min-width:0;min-height:44px;max-height:168px;margin:0;padding:10px 0;border:0;background:transparent;color:var(--h-ink);font:inherit;line-height:1.45;resize:none;outline:none;box-shadow:none}
.coach3 .co-composer textarea:focus-visible{outline:none}
.coach3 .btn.co-send{flex:none;display:inline-flex;align-items:center;justify-content:center;gap:6px;margin:0;min-height:44px;min-width:48px;padding:0 16px;border-radius:14px;background:var(--h-grad);color:#fff}
.coach3 .btn.co-send:not(:disabled):hover{box-shadow:var(--h-e2)}
@container main (max-width:420px){.coach3 .btn.co-send span{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.coach3 .btn.co-send{padding:0 13px}}
.co-foot{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 12px;margin-top:6px}
.co-hint{display:inline-flex;align-items:center;gap:4px;min-width:0}
@media (pointer:coarse){.co-hint{display:none}}
.coach3 .aimsg{margin:6px 0 0}

/* project context */
.co-ctx{border:1px solid var(--h-line);border-radius:18px;background:var(--h-surface);box-shadow:var(--h-e1);padding:4px 14px 12px}
.co-ctx>summary{list-style:none;display:flex;align-items:center;gap:10px;min-height:52px;cursor:pointer}
.co-ctx>summary::-webkit-details-marker{display:none}
.co-ctx>summary::after{content:"";margin-left:auto;width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);transition:transform .2s;color:var(--h-mut)}
.co-ctx[open]>summary::after{transform:rotate(-135deg)}
.co-ctx>summary b{display:block}.co-ctx>summary small{display:block;color:var(--h-mut);font-size:.8rem}
.co-ctxic{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--h-grad);color:#fff;flex:none}
.co-ptitle{margin:4px 0 8px;font-weight:800;line-height:1.3}
.co-dl{display:grid;gap:8px;margin:0 0 10px}
.co-dl dt{font-size:.78rem;font-weight:700;color:var(--h-mut);text-transform:uppercase;letter-spacing:.04em}
.co-dl dd{margin:1px 0 0;font-size:.92rem;line-height:1.45;overflow-wrap:anywhere}
.co-share{display:flex;align-items:center;gap:8px;margin:4px 0;font-weight:600;font-size:.92rem;cursor:pointer}
.co-share input{width:20px;height:20px;min-height:0;margin:0;accent-color:var(--h-pri)}
.co-ctx .row .btn{margin:0}

/* reveal for overview pieces (never the messages or the composer) */
.d3-anim .coach3 .d3rv:not(.in){opacity:0;transform:translateY(14px)}
.d3-anim .coach3 .d3rv{transition:opacity .6s var(--co-ease),transform .6s var(--co-ease)}
:root[data-motion="subtle"] .coach3 .d3rv:not(.in){transform:none}
:root[data-motion="subtle"] .coach3 .d3rv{transition-duration:.22s}
@media(prefers-reduced-motion:reduce){.coach3 *{animation:none!important}.d3-anim .coach3 .d3rv:not(.in){opacity:1;transform:none}.coach3 .co-sug,.coach3 .co-chip{transition:none}}
:root[data-motion="off"] .coach3 .m{animation:none}