:root{
  --bg:#0E1515; --bg2:#132020; --surface:#172424; --surface-alt:#1D2C2C;
  --ink:#ECF2F1; --ink-muted:#93A6A5; --border:#27393A;
  --accent:#31B0A2; --accent-ink:#BEF0E7; --accent-deep:#0B6E63; --accent-soft:#16332F;
  --gold:#DCA850; --gold-soft:#33280F;
  --font:"IBM Plex Sans",ui-sans-serif,system-ui,sans-serif;
  --display:"Fraunces",Georgia,serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
main{max-width:1200px;margin:0 auto;padding:0 24px 64px}

.top{max-width:1200px;margin:0 auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:600;font-size:20px}
.brand-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--accent-deep);color:#fff;font-size:16px}
.brand-by{font-family:var(--mono);font-size:11.5px;color:var(--ink-muted);font-weight:400;letter-spacing:.06em;text-transform:uppercase;margin-left:4px}
.top nav{display:flex;gap:18px;align-items:center;font-size:14px;color:var(--ink-muted)}
.top nav a:hover{color:var(--ink)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:8px;border:1px solid var(--accent-deep);background:var(--accent-deep);color:#fff;font:inherit;font-weight:500;cursor:pointer;transition:background .15s,transform .15s}
.btn:hover{background:#0d8577}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:default}
.btn-ghost{display:inline-flex;align-items:center;padding:10px 16px;border-radius:8px;border:1px solid var(--border);color:var(--ink);font:inherit;font-weight:500;cursor:pointer;background:transparent}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-ink)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-soft);display:inline-flex;padding:4px 10px;border-radius:4px}

.hero{padding:40px 0 36px}
.hero-copy{max-width:720px;display:flex;flex-direction:column;gap:14px}
.hero h1{font-family:var(--display);font-weight:600;font-size:clamp(32px,4.6vw,52px);line-height:1.1;letter-spacing:-.01em;margin:6px 0 0;text-wrap:balance}
.hero p{font-size:17px;color:var(--ink-muted);max-width:62ch;margin:0}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}

/* ---- office ---- */
.office-wrap{display:flex;flex-direction:column;gap:12px;margin-bottom:22px}
.office-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap}
.office-head h2{font-family:var(--display);font-weight:600;font-size:clamp(22px,3vw,30px);margin:0}
.office-hint{margin:2px 0 0;color:var(--ink-muted);font-size:13.5px;font-family:var(--mono)}
.office{position:relative;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:#0e1717;aspect-ratio:16/9;max-height:600px;min-height:280px}
.office canvas{display:block;width:100%;height:100%;touch-action:pan-y}
.office-loading{position:absolute;inset:0;display:grid;place-items:center;color:var(--ink-muted);font-family:var(--mono);font-size:13px}
.office-loading[hidden]{display:none}
.office.no3d{display:none}

/* ---- stage ---- */
.stage-wrap{display:flex;flex-direction:column;gap:14px}
.stage{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);gap:0;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:var(--surface);min-height:560px}
.card-face{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;text-align:center;padding:24px}
.face-initial{width:120px;height:120px;border-radius:50%;display:grid;place-items:center;font-family:var(--display);font-size:56px;font-weight:600;color:var(--accent-ink);background:linear-gradient(160deg,#1f3d39,#122523);border:1px solid #2c4a46;margin-bottom:10px}
.face-name{font-family:var(--display);font-size:28px;font-weight:600}
.face-role{color:var(--ink-muted);font-size:14.5px}
.face-tag{margin-top:10px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-ink);background:var(--accent-soft);padding:4px 10px;border-radius:100px}
.stage-avatar{position:relative;min-width:0;background:radial-gradient(120% 90% at 50% 100%,#1c3532 0%,#0f1a1a 60%,#0b1212 100%);min-height:420px}
.stage-avatar canvas{display:block;width:100%!important;height:100%!important}

.stage-chat{display:flex;flex-direction:column;border-left:1px solid var(--border);background:var(--bg2);min-height:0;min-width:0}
.chat-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px;border-bottom:1px solid var(--border)}
.chat-name{font-family:var(--display);font-size:20px;font-weight:600}
.chat-role{font-size:12.5px;color:var(--ink-muted);font-family:var(--mono)}
.lang{display:flex;flex-direction:column;gap:2px;font-size:11px;color:var(--ink-muted);font-family:var(--mono);text-transform:uppercase;letter-spacing:.08em}
.lang select{font:inherit;font-family:var(--font);font-size:13px;text-transform:none;letter-spacing:0;color:var(--ink);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:6px 8px}
.chat-log{flex:1;overflow-y:auto;padding:16px 18px;display:flex;flex-direction:column;gap:10px;min-height:260px;max-height:420px}
.msg{max-width:88%;padding:10px 13px;border-radius:12px;font-size:14.5px;line-height:1.45;white-space:pre-wrap}
.msg.ai{align-self:flex-start;background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.me{align-self:flex-end;background:var(--accent-deep);color:#fff;border-bottom-right-radius:4px}
.msg.sys{align-self:center;background:transparent;color:var(--ink-muted);font-size:12.5px;font-family:var(--mono);text-align:center}
.msg.typing::after{content:"…";animation:blink 1s infinite}
@keyframes blink{50%{opacity:.3}}
.chat-input{display:flex;gap:8px;padding:12px 14px;border-top:1px solid var(--border)}
.chat-input input{flex:1;min-width:0;font:inherit;font-size:14.5px;color:var(--ink);background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:10px 12px}
.chat-input input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
.mic{width:42px;height:42px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--ink);display:grid;place-items:center;cursor:pointer;flex:none}
.mic.on{background:#a33a2c;border-color:#a33a2c;color:#fff;animation:pulse 1s infinite}
.mic.busy{opacity:.5;cursor:default}
@keyframes pulse{50%{box-shadow:0 0 0 8px rgba(163,58,44,.25)}}
.chat-foot{padding:10px 18px 14px;font-size:12.5px;color:var(--ink-muted);font-family:var(--mono)}
.chat-foot a{color:var(--accent-ink);text-decoration:underline;text-decoration-color:var(--border);text-underline-offset:3px}

/* ---- rail ---- */
.rail{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}
.desk{display:flex;flex-direction:column;gap:4px;padding:12px 12px 10px;border:1px solid var(--border);border-radius:10px;background:var(--surface);cursor:pointer;text-align:left;color:var(--ink);font:inherit;transition:border-color .15s,background .15s;min-width:0}
.desk:hover{border-color:var(--accent)}
.desk.active{border-color:var(--accent);background:var(--accent-soft)}
.desk-name{font-family:var(--display);font-weight:600;font-size:16px;line-height:1.2}
.desk-title{font-size:11.5px;color:var(--ink-muted);line-height:1.3}
.desk-price{font-family:var(--mono);font-size:11.5px;color:var(--accent-ink);margin-top:4px}
.desk-tag{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);background:var(--gold-soft);padding:2px 6px;border-radius:100px;width:fit-content}

/* ---- how ---- */
.how{padding:64px 0 0}
.how h2{font-family:var(--display);font-weight:600;font-size:clamp(24px,3vw,32px);margin:0 0 18px;text-wrap:balance}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.step{padding:18px 20px;border:1px solid var(--border);border-radius:12px;background:var(--surface);display:flex;flex-direction:column;gap:6px}
.step-n{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-ink)}
.step h3{margin:0;font-size:17px;font-weight:600}
.step p{margin:0;color:var(--ink-muted);font-size:14px}

.foot{max-width:1200px;margin:0 auto;padding:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--ink-muted);font-size:12.5px;border-top:1px solid var(--border)}

@media (max-width:980px){
  .stage{grid-template-columns:1fr}
  .stage-chat{border-left:none;border-top:1px solid var(--border)}
  .rail{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:1fr}
}
@media (max-width:560px){
  .rail{grid-template-columns:repeat(2,1fr)}
  .top nav a:not(.btn-ghost){display:none}
}
@media (prefers-reduced-motion:reduce){
  .mic.on{animation:none}.msg.typing::after{animation:none}
}

/* ---- office controls: modes, sticks, zoom, tour caption ---- */
.office-ui{position:absolute;inset:0;pointer-events:none;font-family:var(--font)}
.office-ui button{pointer-events:auto;font:inherit;cursor:pointer}
.office-modes{position:absolute;top:12px;left:12px;display:flex;gap:6px;flex-wrap:wrap}
.office-modes button{font-size:12.5px;padding:7px 12px;border-radius:100px;border:1px solid var(--border);background:rgba(14,23,23,.82);color:var(--ink-muted);backdrop-filter:blur(6px)}
.office-modes button:hover{color:var(--ink);border-color:var(--accent)}
.office-modes button.on{background:var(--accent-deep);border-color:var(--accent-deep);color:#fff}
.office-modes button[data-tour]{color:var(--gold);border-color:#3a3018}
.office-zoom{position:absolute;top:12px;right:12px;display:flex;flex-direction:column;gap:6px}
.office-zoom button{width:34px;height:34px;border-radius:9px;border:1px solid var(--border);background:rgba(14,23,23,.82);color:var(--ink);font-size:17px;line-height:1;backdrop-filter:blur(6px)}
.office-zoom button:hover{border-color:var(--accent);color:var(--accent-ink)}
.office-caption{position:absolute;left:50%;transform:translateX(-50%);bottom:10px;max-width:min(560px,84%);padding:9px 14px;border-radius:12px;border:1px solid var(--border);background:rgba(14,23,23,.92);color:var(--ink);font-size:13.5px;line-height:1.4;backdrop-filter:blur(8px);text-align:center}
.office-caption[hidden]{display:none}
.office-sticks{position:absolute;inset:auto 0 14px;display:flex;justify-content:space-between;padding:0 16px;pointer-events:none}
.office-sticks[hidden]{display:none}
.stick{position:relative;width:104px;height:104px;border-radius:50%;border:1px solid var(--border);background:rgba(14,23,23,.5);backdrop-filter:blur(6px);pointer-events:auto;touch-action:none;display:grid;place-items:center}
.stick-knob{width:44px;height:44px;border-radius:50%;background:var(--accent-deep);border:1px solid var(--accent);transition:transform .08s ease-out;pointer-events:none}
.stick em{position:absolute;bottom:-19px;left:0;right:0;text-align:center;font-style:normal;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-muted)}
@media (max-width:560px){ .stick{width:88px;height:88px} .stick-knob{width:38px;height:38px} .office-modes button{font-size:12px;padding:6px 10px} }
@media (prefers-reduced-motion:reduce){ .stick-knob{transition:none} }