:root{--green:#163d35;--green2:#24695c;--cream:#f6f7f3;--line:#d9e1dd;--text:#1d2925;--muted:#6b7973;--white:#fff;--danger:#a83a3a;--shadow:0 12px 35px rgba(0,0,0,.10)}
*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#eef3f0,#f9faf8);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);min-height:100vh}.shell{max-width:720px;margin:0 auto;min-height:100vh;background:rgba(255,255,255,.84);box-shadow:0 0 45px rgba(0,0,0,.07)}
header{background:var(--green);color:#fff;padding:18px 18px 16px;position:sticky;top:0;z-index:5}.brand{display:flex;align-items:center;gap:12px}.logo{width:42px;height:42px;border-radius:13px;background:#fff;color:var(--green);display:grid;place-items:center;font-size:22px;font-weight:800}.brand h1{font-size:19px;margin:0}.brand small{opacity:.8}.content{padding:18px}.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow);margin-bottom:16px}.hero{text-align:center;padding:28px 18px}.hero h2{margin:8px 0 8px;font-size:26px}.hero p{color:var(--muted);margin:0 auto 20px;max-width:480px}.btn{width:100%;border:0;border-radius:14px;padding:14px 16px;font-size:16px;font-weight:700;cursor:pointer;margin:6px 0;background:var(--green);color:#fff}.btn.alt{background:#fff;color:var(--green);border:1px solid var(--green)}.btn.soft{background:#e8f0ed;color:var(--green)}.btn.danger{background:var(--danger)}.btn:disabled{opacity:.55;cursor:not-allowed}
label{display:block;font-weight:700;margin:12px 0 6px}input,textarea{width:100%;border:1px solid #cbd5d1;border-radius:13px;padding:13px 14px;font-size:16px;background:#fff}textarea{min-height:92px;resize:vertical}.muted{color:var(--muted);font-size:14px}.row{display:flex;gap:10px}.row>*{flex:1}.topline{display:flex;align-items:center;justify-content:space-between;gap:10px}.linkbtn{border:0;background:transparent;color:var(--green2);font-weight:700;cursor:pointer;padding:8px}.status{display:inline-flex;padding:5px 9px;border-radius:999px;font-size:12px;font-weight:800;background:#e7f2ee;color:var(--green)}.status.closed{background:#eee;color:#666}.chat{height:52vh;min-height:360px;overflow:auto;background:#f2f5f3;border-radius:18px;padding:14px;border:1px solid var(--line)}.msg{max-width:82%;padding:10px 12px;border-radius:15px;margin:8px 0;box-shadow:0 2px 7px rgba(0,0,0,.04);white-space:pre-wrap;word-break:break-word}.msg.client{background:#fff;border:1px solid #d7dfdb;margin-right:auto}.msg.admin{background:var(--green);color:#fff;margin-left:auto}.msg time{display:block;font-size:11px;opacity:.7;margin-top:6px}.composer{display:flex;gap:8px;margin-top:10px}.composer textarea{min-height:54px;max-height:130px}.composer .send{width:92px;flex:0 0 92px}.conv{border:1px solid var(--line);border-radius:16px;padding:13px;margin:10px 0;background:#fff;cursor:pointer}.conv:hover{border-color:#9ab5aa}.conv h3{margin:0 0 5px;font-size:16px}.conv .snippet{color:var(--muted);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv .meta{display:flex;justify-content:space-between;font-size:12px;color:#7c8a84;margin-top:7px}.empty{text-align:center;color:var(--muted);padding:30px 12px}.error{background:#fff1f0;color:#8d2929;border:1px solid #f0c6c1;padding:12px;border-radius:12px;margin:10px 0}.ok{background:#eef8f2;color:#255b43;border:1px solid #c8e7d5;padding:12px;border-radius:12px;margin:10px 0}.setup-code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;background:#f4f5f4;padding:10px;border-radius:10px;word-break:break-all}@media(max-width:560px){.content{padding:12px}.card{border-radius:16px;padding:14px}.row{display:block}.chat{height:55vh}.composer .send{width:76px;flex-basis:76px}}

/* Keep talking - identidad visual */
.logo-img{width:48px;height:48px;border-radius:14px;display:block;object-fit:cover;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.10)}
.brand h1{font-size:22px;letter-spacing:.1px}
.hero-chat-icon{position:relative;width:112px;height:88px;margin:0 auto 14px}
.bubble{position:absolute;display:block;border-radius:50% 50% 48% 48%}
.bubble:after{content:"";position:absolute;width:20px;height:20px;transform:rotate(35deg);border-radius:3px}
.bubble-main{left:8px;top:14px;width:72px;height:58px;background:linear-gradient(135deg,#248853,#0f6b3b);z-index:2;box-shadow:0 7px 15px rgba(20,95,62,.18)}
.bubble-main:after{left:10px;bottom:-7px;background:#116f3e}
.bubble-back{right:7px;top:33px;width:58px;height:46px;background:#95d3ad;z-index:1}
.bubble-back:after{right:7px;bottom:-6px;background:#95d3ad}
.bubble-main i{position:relative;z-index:3;display:inline-block;width:9px;height:9px;border-radius:50%;background:#fff;margin:25px 2px 0 2px}.bubble-main i:first-child{margin-left:17px}
.chat-ray{position:absolute;width:5px;height:20px;border-radius:4px;background:#2c9a5d;right:12px;top:5px;transform:rotate(24deg)}
.chat-ray.r2{height:18px;right:0;top:23px;transform:rotate(68deg)}
.hero h2{font-size:32px;line-height:1.16;margin-top:4px}.hero p{font-size:17px;line-height:1.35;margin-bottom:24px}
@media(max-width:560px){.brand h1{font-size:21px}.logo-img{width:46px;height:46px}.hero h2{font-size:30px}}


/* v6 - alertas */
.alert-toggle{width:100%;margin:12px 0 10px;padding:11px 14px;border:1px solid #b8cbc3;border-radius:12px;background:#f4f8f6;color:var(--green);font-weight:800;font-size:14px;cursor:pointer}
.alert-toggle.on{background:#e4f4ea;border-color:#9bc9ad;color:#0f6034}
.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);background:#163d35;color:#fff;padding:12px 16px;border-radius:999px;box-shadow:0 8px 28px rgba(0,0,0,.22);opacity:0;pointer-events:none;transition:.2s;z-index:50;max-width:88vw;text-align:center;font-weight:700}
.toast.show{opacity:1;transform:translate(-50%,0)}


/* v7 - instalación por QR visible */
.qr-home-btn{width:100%;margin:12px 0 0;border:0;background:transparent;color:var(--green2);font-size:15px;font-weight:800;cursor:pointer;padding:10px}
.qr-home-btn:hover{text-decoration:underline}
.qr-install-card{text-align:center}
.qr-install-card .topline{text-align:left}
.qr-install-card p{color:var(--muted);font-size:16px;line-height:1.45;max-width:520px;margin:16px auto}
.qr-install-img{display:block;width:min(320px,82vw);height:auto;margin:8px auto 18px;border-radius:18px;border:10px solid #fff;box-shadow:0 0 0 1px var(--line),0 10px 28px rgba(22,61,53,.12)}
.qr-note{background:#eef6f2;border:1px solid #cfe1d9;border-radius:14px;padding:13px;color:#31463f;line-height:1.4}