:root{color-scheme:dark;--bg:#10131a;--panel:#151922;--panel2:#1b202b;--line:#292f3c;--muted:#8b94a7;--text:#eef1f8;--accent:#a7f3d0;--accent-ink:#10251f;--purple:#b9a5ff;--danger:#ff9eaa;font-family:"DM Sans",sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);min-height:100vh;font-size:14px}button,input,textarea,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.hidden{display:none!important}.app-shell{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100vh;max-width:1600px;margin:auto}.sidebar{background:#12151c;border-right:1px solid var(--line);padding:27px 16px 16px;display:flex;flex-direction:column;min-height:100vh}.brand{display:flex;align-items:center;gap:11px;padding:0 8px 25px}.brand-mark{width:37px;height:37px;display:grid;place-items:center;border-radius:12px;background:var(--accent);color:#12241f;font:700 25px "Space Grotesk";letter-spacing:-2px}.brand strong{display:block;font:700 21px "Space Grotesk";letter-spacing:-.8px}.brand small{display:block;color:var(--muted);font-size:9px;letter-spacing:1.5px;margin-top:1px}.connection{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:11px;padding:12px 10px;border:1px solid var(--line);border-radius:9px;margin-bottom:29px}.status-dot{width:7px;height:7px;background:#777f8e;border-radius:50%}.status-dot.online{background:var(--accent);box-shadow:0 0 10px #a7f3d055}.sidebar-section{flex:1;min-height:100px}.section-heading{display:flex;align-items:center;justify-content:space-between;padding:0 8px;color:#747e91;font-size:10px;font-weight:700;letter-spacing:1.2px;margin-bottom:12px}.icon-button{display:inline-grid;place-items:center;background:transparent;border:1px solid transparent;color:#a6afc0;border-radius:8px;width:34px;height:34px;font-size:18px;transition:background .15s,color .15s}.icon-button:hover{background:var(--panel2);color:var(--text)}.chat-list{display:grid;gap:4px}.empty-list{padding:15px 9px;color:#70798a;font-size:12px;line-height:1.7}.chat-item{width:100%;display:flex;align-items:center;gap:10px;text-align:left;background:transparent;border:0;border-radius:10px;padding:10px 8px;color:var(--text)}.chat-item:hover,.chat-item.active{background:#202631}.avatar{flex:0 0 auto;width:37px;height:37px;border-radius:12px;background:#293345;color:#d8e2ff;display:grid;place-items:center;font-weight:700;font-size:13px}.avatar.large{width:42px;height:42px;border-radius:14px}.chat-item-copy{min-width:0;flex:1}.chat-item-copy strong,.profile-copy strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:600}.chat-item-copy small,.profile-copy small{display:block;color:var(--muted);font-size:11px;margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-item .last-time{font-size:10px;color:#7f899b;align-self:flex-start;margin-top:3px}.sidebar-bottom{padding-top:15px;border-top:1px solid var(--line)}.profile-card{display:flex;align-items:center;gap:10px;padding:8px 4px}.profile-copy{min-width:0;flex:1}.text-button{width:100%;display:flex;justify-content:space-between;background:transparent;border:0;color:#9aa3b3;padding:11px 7px;font-size:12px}.text-button:hover{color:var(--text)}.main-panel{min-width:0;display:flex;flex-direction:column;position:relative;overflow:hidden}.topbar{height:77px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 35px;gap:12px}.topbar-label strong{display:block;font:600 15px "Space Grotesk";margin-top:4px}.eyebrow{display:block;font-size:9px;color:#8a94a8;letter-spacing:1.4px;font-weight:700}.pill-button{display:flex;align-items:center;gap:8px;border:1px solid #343b49;background:#1b202a;color:#d8deea;padding:9px 12px;border-radius:30px;font-size:11px}.tiny-pulse{width:6px;height:6px;background:var(--accent);border-radius:50%}.chevron{color:#8c96a7}.mobile-menu{display:none}.welcome-view{flex:1;display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,340px);align-items:center;gap:35px;padding:70px clamp(30px,6vw,95px);position:relative;isolation:isolate}.welcome-content{position:relative;z-index:1;max-width:570px}.overline{display:flex;align-items:center;gap:10px;color:#a9b4c7;font-size:10px;font-weight:700;letter-spacing:1.6px}.overline-line{width:25px;height:1px;background:var(--accent)}h1{font:600 clamp(42px,5.2vw,68px)/1.06 "Space Grotesk";letter-spacing:-3.2px;margin:25px 0 20px}h1 span{color:var(--accent)}.welcome-content>p{max-width:430px;color:#9da6b7;font-size:14px;line-height:1.9;margin:0}.welcome-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}.primary-button,.secondary-button{border-radius:9px;padding:12px 16px;display:inline-flex;align-items:center;justify-content:center;gap:17px;font-size:12px;font-weight:700;transition:transform .15s,background .15s}.primary-button{background:var(--accent);color:var(--accent-ink);border:1px solid var(--accent)}.primary-button:hover{background:#c2ffe4;transform:translateY(-1px)}.secondary-button{background:transparent;color:#d6dce8;border:1px solid #343b49}.secondary-button:hover{background:#1d232e}.feature-row{display:flex;gap:25px;margin-top:53px;flex-wrap:wrap}.feature-row>div{display:flex;align-items:center;gap:10px}.feature-icon{display:grid;place-items:center;width:31px;height:31px;border:1px solid #333b49;border-radius:9px;color:var(--accent);font-size:18px}.feature-row b,.feature-row small{display:block}.feature-row b{font-size:11px;font-weight:600}.feature-row small{font-size:10px;color:var(--muted);margin-top:4px}.signal-card{position:relative;z-index:1;border:1px solid #303746;border-radius:16px;background:linear-gradient(145deg,#1b212c,#151922);padding:21px;box-shadow:0 24px 90px #0003}.signal-card-head{display:flex;align-items:center;justify-content:space-between;color:#929bad;font-size:9px;font-weight:700;letter-spacing:1px}.live-tag{display:flex;align-items:center;gap:6px;color:var(--accent);font-size:9px}.live-tag i{width:5px;height:5px;background:var(--accent);border-radius:50%}.signal-bits{display:grid;grid-template-columns:repeat(8,1fr);gap:5px;margin:27px 0 8px}.signal-bits span{background:#252d3a;border-radius:5px;padding:8px 0;text-align:center;font:600 12px "Space Grotesk";color:#cbd4e5}.wave-grid{fill:none;stroke:#333b49;stroke-width:.7}.preview-wave{width:100%;height:auto;overflow:visible}.wave-line{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-linejoin:round;stroke-linecap:round}.signal-legend{display:flex;justify-content:space-between;color:#7e899b;font-size:9px;margin-top:10px}.signal-legend span:first-child{display:flex;align-items:center;gap:6px}.signal-legend i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent)}.signal-note{border-top:1px solid #2c3340;margin-top:18px;padding-top:14px;color:#9aa5b6;font-size:10px;line-height:1.7}.signal-note b{color:var(--accent)}.welcome-orb{position:absolute;border-radius:50%;filter:blur(1px);pointer-events:none;z-index:-1}.orb-one{width:350px;height:350px;right:8%;top:15%;background:radial-gradient(circle,#b9a5ff0d,transparent 70%)}.orb-two{width:320px;height:320px;left:12%;bottom:3%;background:radial-gradient(circle,#a7f3d008,transparent 70%)}.chat-view{flex:1;min-height:0;display:flex;flex-direction:column;max-height:calc(100vh - 77px)}.conversation-head{display:flex;align-items:center;gap:12px;padding:17px 30px;border-bottom:1px solid var(--line)}.peer-details{flex:1;min-width:0}.peer-details h2{font:600 15px "Space Grotesk";margin:0}.peer-details p{font-size:11px;color:var(--muted);margin:5px 0 0}.messages{flex:1;min-height:160px;overflow-y:auto;padding:25px clamp(18px,5vw,70px);display:flex;flex-direction:column;gap:14px}.message-empty{margin:auto;text-align:center;color:var(--muted);font-size:12px;line-height:1.8}.message-row{display:flex;flex-direction:column;max-width:min(72%,570px);align-self:flex-start;gap:5px}.message-row.mine{align-self:flex-end;align-items:flex-end}.message-author{font-size:10px;color:#8d97a9;padding:0 4px}.message-bubble{padding:11px 14px;border:1px solid #303746;background:#1b202a;border-radius:4px 13px 13px 13px;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.65;font-size:13px}.message-row.mine .message-bubble{background:#d0f8e7;color:#14231f;border-color:#d0f8e7;border-radius:13px 4px 13px 13px}.message-time{font-size:9px;color:#7d8798;padding:0 4px}.composer-wrap{padding:12px clamp(18px,5vw,70px) 22px;border-top:1px solid var(--line)}.composer-meta,.composer-foot{display:flex;justify-content:space-between;color:#808a9c;font-size:10px;margin:0 2px 9px}.composer{display:flex;align-items:flex-end;gap:9px;padding:9px;background:#1b202a;border:1px solid #343b49;border-radius:12px}.composer:focus-within{border-color:#627a72}.composer textarea{resize:none;max-height:130px;min-height:25px;flex:1;background:transparent;color:var(--text);border:0;outline:none;padding:5px 7px;line-height:1.5}.composer textarea:focus-visible{outline:none}.composer textarea::placeholder{color:#7c8799}.send-button{border:0;background:var(--accent);color:#14231f;border-radius:8px;width:35px;height:35px;font-size:22px;line-height:1;font-weight:700}.send-button:disabled{opacity:.35;cursor:not-allowed}.composer-foot{margin:9px 2px 0;justify-content:flex-start}.encoding-panel{border-top:1px solid var(--line);background:#141820;padding:24px clamp(20px,5vw,70px) 28px}.encoding-heading{display:flex;justify-content:space-between;align-items:center}.encoding-heading h3{font:600 20px "Space Grotesk";margin:6px 0 0}.encoding-description{max-width:740px;color:#9ca6b7;font-size:12px;line-height:1.7;margin:12px 0 18px}.encoding-toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:#a3adbe;font-size:11px}.encoding-toolbar select{background:#202632;border:1px solid #363e4d;color:#e4e9f3;border-radius:7px;padding:8px 9px}.level-control{margin-left:auto;display:flex;align-items:center;gap:8px}.bit-strip{display:flex;gap:4px;overflow-x:auto;margin:18px 0 9px}.bit-cell{flex:1;min-width:28px;background:#252c38;border:1px solid #333c4b;border-radius:5px;text-align:center;padding:7px 2px;color:#d4dceb;font:600 11px "Space Grotesk"}.bit-cell.transition{border-color:#a7f3d080;color:var(--accent)}.wave-wrap{width:100%;overflow-x:auto;border:1px solid #2d3441;background:#171c25;border-radius:9px}.wave-wrap svg{display:block;width:100%;min-width:300px;height:auto}.wave-wrap .grid{stroke:#2d3542;stroke-width:1;fill:none}.wave-wrap .signal{stroke:var(--accent);stroke-width:2.5;fill:none;stroke-linejoin:round;stroke-linecap:round}.wave-wrap text{fill:#8e9aad;font:10px "DM Sans"}.encoding-legend{display:flex;gap:18px;flex-wrap:wrap;color:#9da7b8;font-size:10px;margin-top:12px}.encoding-legend span{display:flex;align-items:center;gap:7px}.encoding-legend i{display:inline-block;width:15px;height:2px;background:var(--accent)}.encoding-legend .legend-stable{background:#858fa1}.encoding-footer{color:#9da7b8;font-size:10px;margin-top:12px;line-height:1.6}.modal-backdrop{position:fixed;inset:0;z-index:20;background:#07090dc9;backdrop-filter:blur(7px);display:grid;place-items:center;padding:18px}.modal{width:min(100%,430px);max-height:calc(100vh - 36px);overflow:auto;position:relative;background:#181d27;border:1px solid #343b49;border-radius:17px;padding:30px;box-shadow:0 25px 90px #0008}.compact-modal{width:min(100%,390px)}.modal-close{position:absolute;right:15px;top:15px;background:transparent;border:0;color:#9aa4b5;font-size:24px}.modal-kicker{font-size:9px;color:var(--accent);font-weight:700;letter-spacing:1.6px}.modal h2{font:600 27px/1.2 "Space Grotesk";letter-spacing:-.7px;margin:12px 0}.modal-description{font-size:12px;line-height:1.7;color:#9ba5b7;margin:0 0 21px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:4px;background:#11151c;border-radius:8px;padding:4px;margin-bottom:20px}.auth-tab{background:transparent;border:0;border-radius:6px;padding:9px;color:#929bad;font-size:12px}.auth-tab.active{background:#2a313e;color:#f0f3fa}.modal form{display:flex;flex-direction:column;gap:8px}.modal form label{font-size:11px;color:#c5ccda;font-weight:600;margin-top:7px}.modal input{width:100%;background:#11151c;border:1px solid #343b49;color:var(--text);border-radius:8px;padding:12px;font-size:12px}.modal input::placeholder{color:#667184}.id-input-wrap{display:flex;align-items:center;gap:1px;background:#11151c;border:1px solid #343b49;border-radius:8px;padding-left:12px;color:var(--accent);font-weight:700}.id-input-wrap input{border:0;background:transparent;padding-left:4px;outline:none}.field-hint{font-size:10px;color:#828da0;line-height:1.6}.full-button{width:100%;margin-top:14px}.form-feedback{font-size:11px;line-height:1.6;color:var(--danger);margin:2px 0}.form-feedback.success{color:var(--accent)}.privacy-note{font-size:10px;color:#7f899b;line-height:1.6;border-top:1px solid var(--line);padding-top:14px;margin:18px 0 0}.modal code{color:var(--accent);background:#252d38;padding:2px 5px;border-radius:4px}.toast{position:fixed;z-index:30;bottom:24px;left:50%;transform:translate(-50%,15px);opacity:0;pointer-events:none;background:#e0f9ed;color:#17352a;padding:11px 16px;border-radius:9px;font-size:12px;box-shadow:0 8px 35px #0005;transition:opacity .2s,transform .2s;max-width:calc(100vw - 30px)}.toast.show{opacity:1;transform:translate(-50%,0)}@media(max-width:1050px){.welcome-view{grid-template-columns:minmax(0,1fr) minmax(230px,290px);gap:22px;padding:55px 35px}.feature-row{gap:15px}.topbar{padding:0 23px}}@media(max-width:760px){.app-shell{grid-template-columns:1fr}.sidebar{position:fixed;z-index:15;left:0;top:0;bottom:0;width:270px;min-height:0;transform:translateX(-105%);transition:transform .2s;box-shadow:20px 0 60px #0006}.sidebar.open{transform:translateX(0)}.topbar{height:68px;padding:0 16px}.mobile-menu{display:inline-grid}.topbar-label{margin-right:auto}.pill-button{font-size:10px;padding:8px}.welcome-view{display:flex;flex-direction:column;align-items:stretch;justify-content:center;gap:35px;padding:42px 23px}.welcome-content{max-width:none}h1{font-size:clamp(43px,11vw,62px);letter-spacing:-2.5px}.welcome-content>p{font-size:13px}.feature-row{margin-top:35px;gap:18px}.signal-card{max-width:450px;width:100%;align-self:center}.chat-view{max-height:calc(100vh - 68px)}.conversation-head{padding:14px 17px}.messages{padding:20px 15px}.message-row{max-width:88%}.composer-wrap{padding:12px 14px 15px}.encoding-panel{padding:20px 16px}.level-control{margin-left:0}.modal{padding:26px 22px}.orb-one{right:-20%;top:20%}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
/* NRZ-I is scoped to the currently open conversation and individual messages. */
.conversation-head .encoding-chat-toggle{flex:0 0 auto;white-space:nowrap;padding:8px 11px}
.encoding-chat-toggle.active{background:#263b35;border-color:#567e70;color:var(--accent)}
.message-meta-row{display:flex;align-items:center;gap:10px;padding:0 4px}
.message-row.mine .message-meta-row{justify-content:flex-end}
.message-encoding-toggle{border:0;background:transparent;color:var(--accent);padding:2px 0;font-size:10px;font-weight:700;text-decoration:underline;text-underline-offset:3px;opacity:.82}
.message-encoding-toggle:hover{opacity:1;color:#c2ffe4}
.chat-view .encoding-panel{flex:0 1 auto;max-height:min(42vh,390px);overflow:auto;border:0;border-bottom:1px solid var(--line);border-top:1px solid var(--line);padding:17px clamp(18px,5vw,70px)}
.chat-view .encoding-panel .encoding-heading h3{font-size:16px}
.chat-view .encoding-panel .encoding-description{margin:8px 0 12px}
.chat-view .encoding-panel .bit-strip{margin:12px 0 8px}
@media(max-width:760px){
  .conversation-head{gap:8px}
  .conversation-head .encoding-chat-toggle{font-size:10px;padding:7px 9px;gap:5px}
  .chat-view .encoding-panel{max-height:38vh;padding:14px}
}

/* Profile completion uses the same compact modal language as authentication. */
#profileSubmit:disabled{opacity:.65;cursor:wait}
#profileFeedback:empty{display:none}