:root{color-scheme:light;--blue:#075ea8;--blue-dark:#064b84;--bg:#eef3f7;--card:#fff;--text:#17212b;--muted:#647483;--line:#d8e1e8;--green:#198754;--red:#b42318;--orange:#b54708;--yellow:#936800;--shadow:0 8px 24px rgba(20,48,72,.08)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.45 system-ui,-apple-system,"Segoe UI",sans-serif}
button,input,textarea{font:inherit}
button{min-height:44px;border:0;border-radius:8px;background:var(--blue);color:#fff;padding:10px 18px;font-weight:700;cursor:pointer}
button:hover{background:var(--blue-dark)}
input,textarea{display:block;width:100%;margin-top:6px;border:1px solid #b7c6d1;border-radius:8px;background:#fff;padding:11px 12px;color:var(--text)}
input{min-height:44px}textarea{resize:vertical;min-height:100px}
input:focus,textarea:focus{outline:3px solid rgba(7,94,168,.2);border-color:var(--blue)}
label{display:block;margin:0 0 14px;font-weight:650}
.topbar{min-height:58px;display:flex;align-items:center;gap:18px;padding:7px max(16px,calc((100% - 1080px)/2));background:#fff;border-bottom:1px solid var(--line)}
.brand{font-size:20px;font-weight:800;letter-spacing:.02em}.brand span{color:var(--blue)}
.version{margin-left:auto;color:var(--muted);font-size:14px}.topbar form{margin:0}
.link-button{background:transparent;color:var(--blue);padding:6px 12px}.link-button:hover{background:#e8f2fa}
.container{width:min(1080px,calc(100% - 28px));margin:22px auto 44px;display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:18px;align-items:start}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:var(--shadow)}
.card h1,.card h2{margin:0 0 16px;font-size:21px}.send-card{grid-row:span 1}.messages-card{grid-column:1/-1}
.form-footer,.section-title,.message-meta,.message-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px}
.form-footer span{color:var(--muted);font-variant-numeric:tabular-nums}.section-title h2{margin:0}.section-title a{min-height:44px;display:flex;align-items:center;color:var(--blue)}
.form-footer span.counter-error{color:var(--red);font-weight:700}
.hint{margin:-6px 0 12px;color:var(--muted);font-size:13px}
.alert{grid-column:1/-1;border-radius:8px;padding:12px 14px}.alert.success{background:#e9f8ef;color:#116a3d}.alert.error{background:#fff0ef;color:var(--red)}
.devices{display:grid;gap:9px}.device{display:grid;grid-template-columns:12px 1fr auto;align-items:center;gap:8px;padding:10px 0;border-bottom:1px solid var(--line)}.device:last-child{border-bottom:0}.device small{grid-column:2/-1;color:var(--muted)}
.dot{width:10px;height:10px;border-radius:50%;background:#84919b}.dot.online{background:var(--green)}.dot.offline{background:var(--red)}.dot.disabled{background:#5b6570}.dot.never_seen{background:var(--yellow)}
.messages{display:grid;gap:12px}.message{padding:15px;border:1px solid var(--line);border-left:5px solid var(--blue);border-radius:9px}.message.incoming{border-left-color:var(--green);background:#fbfffc}.message p{white-space:normal;overflow-wrap:anywhere;margin:10px 0}.message-bottom{font-size:13px;color:var(--muted)}
.badge{display:inline-flex;align-items:center;min-height:28px;border-radius:999px;padding:3px 10px;background:#edf1f4;color:#40505d;font-size:13px;font-weight:700}.status-sent,.status-received{background:#e7f7ed;color:#137044}.status-failed,.status-unknown{background:#fff0ef;color:var(--red)}.status-sending{background:#e7f1fb;color:var(--blue-dark)}.status-queued{background:#fff7df;color:var(--yellow)}
.error-text{display:block;color:var(--red);margin-top:8px}.muted{color:var(--muted)}
.login-page{min-height:100vh;display:grid;place-items:center;padding:16px}.login-card{width:min(420px,100%);background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:var(--shadow)}.login-card h1{font-size:24px;margin:18px 0}.login-card button{width:100%}.login-card .muted{text-align:center;margin:20px 0 0;font-size:13px}
@media(max-width:760px){.container{grid-template-columns:1fr;margin-top:14px}.messages-card{grid-column:auto}.topbar{padding-inline:12px}.version{display:none}.card{padding:16px}.form-footer{align-items:flex-end}.form-footer button{max-width:220px}.message-meta{align-items:flex-start}}
@media(max-width:430px){.brand{font-size:17px}.link-button{padding-inline:8px}.form-footer{display:grid;grid-template-columns:1fr}.form-footer button{max-width:none;width:100%}.message-bottom{align-items:flex-start;flex-direction:column;gap:2px}}