/* ============================================================
   Emma‑5 — Italian computing heritage (Olivetti-inspired)
   paper canvas · ink · one Olivetti red · mono machine layer
   ============================================================ */

/* ---- Fonts (self-hosted, offline) ---- */
@font-face{font-family:"Space Grotesk";src:url("/fonts/spacegrotesk-700.woff2") format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Space Grotesk";src:url("/fonts/spacegrotesk-500.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Inter";src:url("/fonts/inter-400.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Inter";src:url("/fonts/inter-500.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Inter";src:url("/fonts/inter-600.woff2") format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Space Mono";src:url("/fonts/spacemono-400.woff2") format("woff2");font-weight:400;font-display:swap}

:root{
  --paper:#ECE5D6;        /* warm canvas */
  --surface:#F6F1E7;      /* raised paper */
  --surface-2:#E4DCC9;    /* sunk paper */
  --ink:#1C1813;          /* near-black warm */
  --ink-soft:#4A433A;
  --muted:#8C8270;        /* warm grey */
  --line:#D6CCB7;
  --line-strong:#C4B89F;
  --red:#D23A26;          /* Olivetti red */
  --red-deep:#A82A18;
  --green:#1F7A4D;        /* tricolore */
  --display:"Space Grotesk",system-ui,sans-serif;
  --body:"Inter",system-ui,-apple-system,sans-serif;
  --mono:"Space Mono",ui-monospace,"SFMono-Regular",monospace;
  --r:5px;
  --sidebar-w:268px;
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{height:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--body);font-size:15.5px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  /* faint paper grain via layered gradients (no external asset) */
  background-image:
    radial-gradient(circle at 18% -10%, rgba(210,58,38,.05), transparent 38%),
    radial-gradient(circle at 100% 0%, rgba(31,122,77,.045), transparent 30%);
}
button,input,textarea{font:inherit;color:inherit}
::selection{background:rgba(210,58,38,.22)}

/* ---- App shell ---- */
.app{display:grid;grid-template-columns:var(--sidebar-w) 1fr;height:100dvh;overflow:hidden}

/* ============== SIDEBAR ============== */
.sidebar{
  background:var(--surface-2);
  border-right:1px solid var(--line-strong);
  display:flex;flex-direction:column;min-height:0;
  padding:18px 14px 12px;
}
.brand{display:flex;align-items:center;gap:11px;padding:4px 6px 16px}
.brand__mark{
  font-family:var(--mono);font-weight:700;font-size:14px;letter-spacing:.02em;
  color:var(--surface);background:var(--ink);
  width:34px;height:34px;border-radius:var(--r);
  display:grid;place-items:center;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.35), 0 1px 0 rgba(255,255,255,.4);
}
.brand__txt{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--display);font-weight:700;font-size:15px;letter-spacing:.06em}
.brand__sub{font-family:var(--mono);font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em}

.newchat{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  width:100%;padding:11px 13px;margin-bottom:14px;cursor:pointer;
  background:var(--ink);color:var(--surface);
  border:none;border-radius:var(--r);
  font-weight:500;letter-spacing:.01em;
  box-shadow:inset 0 -2px 0 rgba(0,0,0,.4);
  transition:transform .12s ease, background .2s ease;
}
.newchat:hover{background:#2a241c}
.newchat:active{transform:translateY(1px)}
.newchat kbd{
  font-family:var(--mono);font-size:13px;background:rgba(255,255,255,.13);
  border-radius:4px;padding:1px 8px;color:var(--surface);
}

.convos{flex:1;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:3px;margin:0 -4px;padding:0 4px}
.convo{
  display:flex;align-items:center;gap:9px;width:100%;text-align:left;cursor:pointer;
  background:transparent;border:1px solid transparent;border-radius:var(--r);
  padding:9px 10px;color:var(--ink-soft);
  font-size:14px;line-height:1.3;
  transition:background .15s ease,border-color .15s ease;
}
.convo:hover{background:rgba(255,255,255,.45)}
.convo.active{background:var(--surface);border-color:var(--line-strong);color:var(--ink)}
.convo__tick{width:3px;align-self:stretch;border-radius:2px;background:transparent;flex:none}
.convo.active .convo__tick{background:var(--red)}
.convo__title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.convo__del{
  opacity:0;border:none;background:transparent;cursor:pointer;color:var(--muted);
  font-size:16px;line-height:1;padding:2px 4px;border-radius:4px;flex:none;
}
.convo:hover .convo__del{opacity:1}
.convo__del:hover{color:var(--red);background:rgba(210,58,38,.1)}

.sidebar__foot{
  display:flex;align-items:center;gap:8px;padding:12px 6px 2px;margin-top:8px;
  border-top:1px solid var(--line);font-family:var(--mono);
  font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;
}
.sidebar__foot .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(31,122,77,.18)}
.sidebar__host{padding:10px 6px 0;font-family:var(--mono);font-size:10.5px;
  letter-spacing:.06em;text-transform:uppercase;color:var(--muted);
  display:flex;align-items:center;gap:5px;flex-wrap:wrap}
.sidebar__host a{display:inline-flex;align-items:center;gap:4px;color:var(--ink-soft);text-decoration:none}
.sidebar__host a svg{flex:none}
.sidebar__host a:hover{color:var(--red)}
.sidebar__disclaimer{margin:7px 6px 0;font-size:9px;line-height:1.4;color:var(--muted);letter-spacing:.01em}
.sidebar__lic{display:block;padding:10px 6px 2px;font-family:var(--mono);font-size:10.5px;
  letter-spacing:.06em;text-transform:uppercase;color:var(--muted);text-decoration:none}
.sidebar__lic:hover{color:var(--red)}

/* ============== MAIN ============== */
.main{display:flex;flex-direction:column;min-width:0;min-height:0;position:relative}

/* --- Machine plate header (signature) --- */
.plate{
  display:flex;align-items:center;gap:14px;
  padding:14px 24px;border-bottom:1px solid var(--line-strong);
  background:linear-gradient(180deg,var(--surface),var(--paper));
}
.plate .plate__menu{display:none} /* hidden on desktop (beats .icon-btn display) */
.plate__id{flex:1;min-width:0}
.plate__name{
  font-family:var(--display);font-weight:700;font-size:23px;letter-spacing:.04em;line-height:1;
}
.plate__name .five{color:var(--red)}
.plate__spec{
  font-family:var(--mono);font-size:10.5px;color:var(--muted);
  letter-spacing:.13em;margin-top:5px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.plate__right{display:flex;align-items:center;gap:14px}
/* tricolore power LED */
.led{display:inline-flex;gap:4px;align-items:center}
.led i{width:8px;height:8px;border-radius:50%;display:block;opacity:.9}
.led i:nth-child(1){background:var(--green)}
.led i:nth-child(2){background:#f4efe4;box-shadow:inset 0 0 0 1px var(--line-strong)}
.led i:nth-child(3){background:var(--red)}
.led.busy i{animation:blink 1s steps(2,end) infinite}
.led.busy i:nth-child(2){animation-delay:.16s}
.led.busy i:nth-child(3){animation-delay:.32s}
@keyframes blink{50%{opacity:.25}}

.icon-btn{
  background:transparent;border:1px solid var(--line-strong);border-radius:var(--r);
  width:36px;height:36px;cursor:pointer;color:var(--ink-soft);font-size:16px;
  display:grid;place-items:center;transition:background .15s,border-color .15s;
}
.icon-btn:hover{background:var(--surface);border-color:var(--muted)}

/* --- Thread --- */
.thread{
  flex:1;min-height:0;overflow-y:auto;
  padding:34px 24px 28px;scroll-behavior:smooth;
}
.thread__inner,.msg-wrap{max-width:760px;margin:0 auto}

/* empty / welcome state */
.welcome{max-width:680px;margin:6vh auto 0;text-align:left}
.welcome__eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--red);text-transform:uppercase}
.welcome__h{font-family:var(--display);font-weight:700;font-size:clamp(28px,5vw,44px);line-height:1.05;margin:14px 0 12px;letter-spacing:-.01em}
.welcome__h em{font-style:normal;color:var(--red)}
.welcome__p{color:var(--ink-soft);max-width:54ch;margin:0 0 26px}
.starters{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.starter{
  text-align:left;cursor:pointer;background:var(--surface);
  border:1px solid var(--line-strong);border-radius:var(--r);
  padding:14px 15px;transition:transform .12s ease,border-color .15s,box-shadow .15s;
}
.starter:hover{transform:translateY(-2px);border-color:var(--red);box-shadow:0 6px 18px -12px rgba(210,58,38,.5)}
.starter b{display:block;font-weight:600;font-size:14.5px;margin-bottom:3px}
.starter span{font-size:13px;color:var(--muted)}

/* --- Messages --- */
.msg{margin:0 auto 26px}
.msg-wrap{display:flex;flex-direction:column;gap:7px}
.msg__role{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  display:flex;align-items:center;gap:8px;
}
.msg__role::before{content:"";width:16px;height:2px;background:var(--line-strong)}
.msg--user .msg__role{color:var(--ink-soft);flex-direction:row-reverse}
.msg--user .msg__role::before{background:var(--ink-soft)}
.msg--bot .msg__role{color:var(--red)}
.msg--bot .msg__role::before{background:var(--red)}

/* user hugs the right, assistant the left */
.msg--user .msg-wrap{align-items:flex-end}
.msg--bot .msg-wrap{align-items:flex-start}

.msg__body{font-size:15.5px}
/* user: stamped card on sunk paper, right-aligned */
.msg--user .msg__body{
  background:var(--surface-2);border:1px solid var(--line-strong);
  border-right:3px solid var(--ink-soft);
  border-radius:var(--r);padding:12px 15px;color:var(--ink);
  max-width:80%;
}
/* assistant: printed straight on the page */
.msg--bot .msg__body{color:var(--ink)}

.msg__body p{margin:0 0 .8em}
.msg__body p:last-child{margin-bottom:0}
.msg__body ul,.msg__body ol{margin:.2em 0 .9em;padding-left:1.4em}
.msg__body li{margin:.2em 0}
.msg__body strong{font-weight:600}
.msg__body code{
  font-family:var(--mono);font-size:.86em;background:var(--surface-2);
  padding:.12em .4em;border-radius:4px;border:1px solid var(--line);
}
.msg__body pre{
  background:#23201a;color:#f3ecdd;border-radius:var(--r);
  padding:14px 16px;overflow-x:auto;margin:.4em 0 1em;
  border:1px solid #000;box-shadow:inset 0 -2px 0 rgba(0,0,0,.4);
}
.msg__body pre code{background:none;border:none;padding:0;color:inherit;font-size:13px}

/* blinking block caret while streaming */
.caret{display:inline-block;width:.55em;height:1.05em;margin-left:1px;
  vertical-align:-2px;background:var(--red);animation:caret 1s steps(2,end) infinite}
@keyframes caret{50%{opacity:0}}

/* typing indicator (before first token) */
.typing{display:inline-flex;gap:5px;align-items:center;height:1.2em}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:bob 1.1s ease-in-out infinite}
.typing i:nth-child(2){animation-delay:.16s}
.typing i:nth-child(3){animation-delay:.32s}
@keyframes bob{0%,80%,100%{transform:translateY(0);opacity:.4}40%{transform:translateY(-4px);opacity:1}}

/* msg actions */
.msg__actions{display:flex;gap:6px;opacity:0;transition:opacity .15s}
.msg:hover .msg__actions{opacity:1}
.msg__act{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;
  cursor:pointer;background:none;border:none;color:var(--muted);padding:2px 4px;border-radius:4px}
.msg__act:hover{color:var(--red)}

/* --- Settings drawer --- */
.settings{
  max-width:760px;width:calc(100% - 48px);margin:0 auto;
  background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r);
  padding:16px 18px;margin-bottom:6px;
  box-shadow:0 12px 30px -20px rgba(0,0,0,.5);
}
.settings__row{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.settings label{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);
  display:flex;justify-content:space-between;align-items:center}
.settings label output{color:var(--red)}
.settings textarea{
  background:var(--paper);border:1px solid var(--line-strong);border-radius:var(--r);
  padding:9px 11px;resize:vertical;font-size:14px;
}
.settings textarea:focus,.composer__input:focus{outline:2px solid var(--red);outline-offset:1px;border-color:transparent}
.settings__grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 20px}
.ctrl{display:flex;flex-direction:column;gap:7px}
input[type=range]{-webkit-appearance:none;appearance:none;height:3px;background:var(--line-strong);border-radius:2px}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;
  background:var(--red);cursor:pointer;border:2px solid var(--surface);box-shadow:0 1px 4px rgba(0,0,0,.3)}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--red);cursor:pointer;border:2px solid var(--surface)}

/* --- Composer --- */
.composer{padding:8px 24px 18px;background:linear-gradient(0deg,var(--paper) 70%,transparent)}
.composer__form{
  max-width:760px;margin:0 auto;position:relative;display:flex;align-items:flex-end;gap:10px;
  background:var(--surface);border:1px solid var(--line-strong);border-radius:12px;
  padding:8px 8px 8px 16px;
  box-shadow:0 10px 30px -22px rgba(0,0,0,.6);
  transition:border-color .15s,box-shadow .15s;
}
.composer__form:focus-within{border-color:var(--red);box-shadow:0 10px 30px -18px rgba(210,58,38,.5)}
.composer__input{
  flex:1;border:none;background:none;resize:none;padding:9px 0;max-height:200px;
  line-height:1.5;
}
.composer__input:focus{outline:none}
.composer__send,.composer__stop{
  flex:none;width:40px;height:40px;border-radius:9px;cursor:pointer;border:none;
  display:grid;place-items:center;transition:transform .12s,background .2s,opacity .2s;
}
.composer__send{background:var(--red);color:#fff;box-shadow:inset 0 -2px 0 rgba(0,0,0,.25)}
.composer__send:hover{background:var(--red-deep)}
.composer__send:active{transform:translateY(1px)}
.composer__send:disabled{background:var(--line-strong);color:var(--muted);cursor:not-allowed;box-shadow:none}
.composer__stop{background:var(--ink);color:#fff}
.composer__stop span{width:11px;height:11px;border-radius:2px;background:currentColor;display:block}
.composer__stop:hover{background:#000}
.composer__hint{
  max-width:760px;margin:10px auto 0;display:flex;justify-content:space-between;
  font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.04em;
}
.composer__hint kbd{background:var(--surface-2);border:1px solid var(--line);border-radius:3px;padding:0 5px}
.composer__model{text-transform:uppercase;letter-spacing:.1em}
.composer__liclink{color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line-strong)}
.composer__liclink:hover{color:var(--red);border-color:var(--red)}

/* scrollbars */
.convos::-webkit-scrollbar,.thread::-webkit-scrollbar{width:10px}
.thread::-webkit-scrollbar-thumb,.convos::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:6px;border:3px solid transparent;background-clip:content-box}

/* ============== RESPONSIVE ============== */
.scrim{display:none}
@media (max-width:820px){
  .app{grid-template-columns:1fr}
  .sidebar{
    position:fixed;inset:0 auto 0 0;width:84vw;max-width:320px;z-index:30;
    transform:translateX(-100%);transition:transform .26s cubic-bezier(.2,.7,.3,1);
    box-shadow:0 0 60px rgba(0,0,0,.3);
  }
  .app.nav-open .sidebar{transform:none}
  .scrim{display:block;position:fixed;inset:0;background:rgba(20,16,12,.4);z-index:20;opacity:0;pointer-events:none;transition:opacity .26s}
  .app.nav-open .scrim{opacity:1;pointer-events:auto}
  .plate .plate__menu{display:grid;line-height:1}
  .thread,.composer{padding-left:16px;padding-right:16px}
  .composer{padding-bottom:10px}
  .composer__hint{display:none} /* free up vertical space on mobile */
  .starters{grid-template-columns:1fr}
  .settings__grid{grid-template-columns:1fr}
}

/* accessibility */
:focus-visible{outline:2px solid var(--red);outline-offset:2px}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto}
  .caret{animation:none;opacity:1}
}