:root{
  --bg:#ffffff; --bg-soft:#f4f7f0; --panel:#ffffff;
  --line:#e3e8dd; --ink:#1f2a17; --muted:#6c757d;
  --green:#1c470f; --leaf:#4d7e29; --leaf-bright:#5f9a33;
  --user:#1c470f; --radius:14px;
  --font:'Lato',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --head:'Biryani','Lato',sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:var(--font);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}
a{color:var(--leaf)}

.brand{display:flex;align-items:center;gap:11px}
.brand img{height:42px;width:auto;display:block}
.brand svg{display:block;flex:0 0 auto}
.brand .pname{font-family:var(--head);font-weight:800;letter-spacing:.02em;font-size:16px;color:var(--green);
  line-height:1;border-left:1px solid var(--line);padding-left:12px}
.brand .pname span{display:block;font-family:var(--font);font-weight:400;font-size:11px;color:var(--muted);
  letter-spacing:.14em;text-transform:uppercase;margin-top:3px}

/* ---------- Landing ---------- */
.bg-grid{position:fixed;inset:0;z-index:0;
  background:
   radial-gradient(820px 460px at 82% -8%, rgba(77,126,41,.16), transparent 60%),
   radial-gradient(640px 460px at -5% 108%, rgba(28,71,15,.10), transparent 55%),
   var(--bg-soft);
}
.hero{position:relative;z-index:1;min-height:100vh;display:grid;grid-template-columns:1.2fr .8fr;
  gap:52px;align-items:center;max-width:1120px;margin:0 auto;padding:6vh 32px}
.hero-copy .brand{margin-bottom:28px}
.hero-copy h1{font-family:var(--head);font-size:clamp(40px,6vw,72px);line-height:1.02;margin:.1em 0 .35em;
  font-weight:800;letter-spacing:-.01em;color:var(--green)}
.hero-copy h1 small{display:block;font-size:.34em;font-weight:600;letter-spacing:.02em;color:var(--leaf);margin-top:.4em;text-transform:none}
.tag{color:#46523c;font-size:18px;line-height:1.6;max-width:30em}
.feat{list-style:none;padding:0;margin:26px 0;color:#36412c}
.feat li{padding:8px 0 8px 28px;position:relative}
.feat li:before{content:"✓";position:absolute;left:0;color:var(--leaf);font-weight:800}
.oak{margin-top:28px;color:#8a9580;font-size:12px;letter-spacing:.12em;text-transform:uppercase}

.login-card{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:20px;
  padding:34px 30px;box-shadow:0 24px 60px rgba(28,71,15,.12)}
.login-card h2{font-family:var(--head);margin:0 0 2px;font-size:24px;color:var(--green)}
.login-card .sub{margin:0 0 22px;color:var(--muted);font-size:13px}
label{display:block;font-size:13px;color:#55604a;margin-bottom:15px;font-weight:700}
input{width:100%;margin-top:7px;padding:13px 14px;border-radius:11px;border:1px solid #d6dccc;
  background:#fcfdfb;color:var(--ink);font-size:15px;font-family:inherit;outline:none;transition:border .15s,box-shadow .15s}
input:focus{border-color:var(--leaf);box-shadow:0 0 0 3px rgba(77,126,41,.15)}
button{cursor:pointer;font-family:inherit}
.login-card button{width:100%;margin-top:10px;padding:13px;border:0;border-radius:11px;
  background:linear-gradient(180deg,var(--leaf),var(--green));color:#fff;font-weight:700;font-size:15px;letter-spacing:.01em}
.login-card button:hover{filter:brightness(1.07)}
.alert{background:#fdecec;border:1px solid #f3c3c3;color:#a4322b;padding:10px 12px;border-radius:10px;font-size:13px;margin-bottom:16px}
@media(max-width:820px){.hero{grid-template-columns:1fr;padding-top:7vh}.login-card{order:-1}}

/* ---------- App ---------- */
.appshell{display:flex;flex-direction:column;height:100vh;background:var(--bg-soft)}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;
  border-bottom:2px solid var(--green);background:#fff}
.who{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--muted)}
.ghost{padding:7px 13px;border:1px solid var(--line);border-radius:9px;text-decoration:none;font-size:13px;color:var(--green);font-weight:700}
.ghost:hover{background:var(--green);color:#fff;border-color:var(--green)}

.chat{flex:1;overflow-y:auto;padding:26px 16px;max-width:820px;width:100%;margin:0 auto}
.msg{display:flex;gap:12px;margin:18px 0;align-items:flex-start}
.msg .avatar{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;
  background:var(--green);color:#fff;flex:0 0 auto;font-size:14px;font-weight:800}
.bubble{background:var(--panel);border:1px solid var(--line);padding:13px 15px;border-radius:13px;
  line-height:1.55;font-size:15.5px;white-space:pre-wrap;word-wrap:break-word;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.msg.acorn .bubble{background:#eef4e8;border-color:#dbe6cf}
.msg.user{flex-direction:row-reverse}
.msg.user .avatar{background:#c9d3bd;color:var(--green)}
.msg.user .bubble{background:var(--green);border-color:var(--green);color:#fff}
.bubble.thinking{color:var(--muted)}
.bubble strong{color:inherit;font-weight:800}

.composer{display:flex;gap:10px;align-items:flex-end;padding:14px 16px;border-top:1px solid var(--line);
  background:#fff;max-width:820px;width:100%;margin:0 auto}
.composer textarea{flex:1;resize:none;max-height:160px;padding:13px 14px;border-radius:12px;
  border:1px solid #d6dccc;background:#fcfdfb;color:var(--ink);font-size:15.5px;font-family:inherit;line-height:1.4}
.composer textarea:focus{outline:none;border-color:var(--leaf);box-shadow:0 0 0 3px rgba(77,126,41,.13)}
.mic{width:46px;height:46px;border-radius:12px;border:1px solid #d6dccc;background:#fcfdfb;font-size:18px}
.mic:hover{border-color:var(--leaf)}
.mic.live{background:#fbe8e8;border-color:#d66;animation:pulse 1.1s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(200,60,60,.45)}50%{box-shadow:0 0 0 8px rgba(200,60,60,0)}}
.send{padding:0 22px;height:46px;border:0;border-radius:12px;background:linear-gradient(180deg,var(--leaf),var(--green));
  color:#fff;font-weight:700;font-size:15px}
.send:disabled{opacity:.5}