:root{--bg:#f7f7f8;--surface:#fff;--ink:#000;--muted:#757575;--line:#e3e3e6;--line-strong:#d0d0d4;--hover:#f2f2f4;--ok:#188038;--warn:#b3261e;--shadow:0 1px 2px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.06);--radius:16px}*{box-sizing:border-box;margin:0;padding:0}body,html{background:var(--bg);color:var(--ink);font-family:Roboto,-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;font-size:15px;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.topbar{gap:20px;padding:0 28px;height:64px;background:var(--surface);border-bottom:1px solid var(--line);position:-webkit-sticky;position:sticky;top:0;z-index:20}.topbar,.topbar .brand{display:flex;align-items:center}.topbar .brand{font-size:17px;font-weight:700;letter-spacing:-.2px;gap:10px}.brand .mark{width:22px;height:22px;border-radius:6px;background:var(--ink);display:inline-flex;align-items:center;justify-content:center}.brand .mark span{width:8px;height:8px;border-radius:2px;background:var(--surface)}.topbar .spacer{flex:1 1}.topbar .who{font-size:13px;color:var(--muted)}.topbar .nav{display:flex;gap:6px}.wrap{max-width:1240px;margin:0 auto;padding:28px}.section{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:26px 0 12px}.btn,.section{font-weight:600}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:24px;padding:10px 22px;font-size:14px;font-family:inherit;cursor:pointer;transition:opacity .15s,background .15s,box-shadow .15s;white-space:nowrap}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-fill{background:var(--ink);color:var(--surface)}.btn-fill:hover:not(:disabled){box-shadow:0 2px 6px rgba(0,0,0,.3)}.btn-fill:active:not(:disabled){opacity:.85}.btn-outline{background:var(--surface);color:var(--ink);border:1px solid var(--line-strong)}.btn-outline:hover:not(:disabled){background:var(--hover)}.btn-outline.danger{color:var(--warn);border-color:rgba(179,38,30,.35)}.btn-ghost{background:transparent;color:var(--ink);padding:8px 12px}.btn-ghost:hover{background:var(--hover)}.btn-sm{padding:6px 14px;font-size:13px}.field{margin-bottom:16px}.field label{display:block;font-size:12.5px;font-weight:600;color:#3c4043;margin-bottom:6px}.input{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line-strong);background:var(--surface);font-size:14.5px;font-family:inherit;color:var(--ink);outline:none;transition:border-color .15s,box-shadow .15s}.input:focus{border-color:var(--ink);box-shadow:0 0 0 3px rgba(0,0,0,.08)}.input::placeholder{color:#b0b0b4}select.input{cursor:pointer}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.grid{display:grid;grid-gap:16px;gap:16px}.grid-4{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}.row{display:flex;align-items:center;gap:12px}.row.between{justify-content:space-between}.row.wrap{flex-wrap:wrap}.err{color:var(--warn);font-size:13px;min-height:18px;margin-top:10px}.hint,.muted{color:var(--muted);font-size:13px}.soon{color:var(--ok);font-size:12.5px}.chip,.soon{font-weight:600}.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;font-size:12px;background:var(--hover);border:1px solid var(--line)}.chip .dot{width:8px;height:8px;border-radius:50%;background:#b0b0b4}.chip.on .dot{background:var(--ok)}.chip .dot.off{background:#b0b0b4}.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:11.5px;font-weight:600;background:var(--hover);border:1px solid var(--line)}.badge.on{color:var(--ok);border-color:rgba(24,128,56,.3)}.badge.off{color:#9aa0a6}.badge.admin{color:#1a73e8;background:rgba(26,115,232,.08);border-color:rgba(26,115,232,.25)}.badge.user{color:var(--muted)}.table-card{padding:8px 0;overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:13.5px}th{text-align:left;color:var(--muted);font-weight:600;font-size:12px;letter-spacing:.03em}td,th{padding:12px 16px;border-bottom:1px solid var(--line)}tr:last-child td{border-bottom:none}tr:hover td{background:var(--hover)}.auth-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:400px}.auth-card .logo{display:flex;align-items:center;gap:12px;justify-content:center;margin-bottom:6px}.auth-card .logo .mark{width:40px;height:40px;border-radius:12px}.auth-card h1{font-size:22px;font-weight:700}.auth-card .tagline{text-align:center;color:var(--muted);margin-bottom:24px}.tabs{display:flex;border-bottom:2px solid var(--line);margin-bottom:24px}.tabs button{flex:1 1;display:inline-flex;align-items:center;justify-content:center;gap:6px;background:none;font:inherit;font-size:14.5px;font-weight:600;color:var(--muted);padding:12px 0;cursor:pointer;border:none;border-bottom:2px solid transparent;margin-bottom:-2px}.tabs button.active{color:var(--ink);border-color:var(--ink)}.divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12.5px;margin:18px 0}.divider:after,.divider:before{content:"";flex:1 1;height:1px;background:var(--line)}.device-list{display:flex;flex-direction:column;gap:8px}.device-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;cursor:pointer;transition:border-color .12s,background .12s}.device-item:hover{background:var(--hover)}.device-item.active{border-color:var(--ink);background:#fafafa;box-shadow:0 0 0 1px var(--ink)}.device-item .name{font-weight:600;font-size:14px}.device-item .meta{color:var(--muted);font-size:12.5px;margin-top:2px}.soil-card{padding:16px}.soil-card .lbl{font-size:12.5px;color:var(--muted);font-weight:600;margin-bottom:6px;text-transform:uppercase;letter-spacing:.04em}.soil-card .val{font-size:26px;font-weight:700;letter-spacing:-.5px}.soil-card .unit{font-size:14px;color:var(--muted);font-weight:500;margin-left:4px}.soil-card .ts{font-size:12px;color:var(--muted);margin-top:6px}.chart-box{min-height:320px;position:relative}.controls{display:flex;align-items:flex-end;gap:10px;flex-wrap:wrap}.overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;z-index:100;padding:24px}.modal{background:var(--surface);border-radius:20px;box-shadow:0 12px 40px rgba(0,0,0,.25);padding:26px;width:100%;max-width:480px;max-height:88vh;overflow:auto}.modal.wide{max-width:860px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--surface);padding:12px 20px;border-radius:999px;font-size:13.5px;z-index:200;box-shadow:0 6px 20px rgba(0,0,0,.3);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}.toast.show{opacity:1;transform:translateX(-50%) translateY(-4px)}.empty{color:var(--muted);font-size:13.5px;padding:18px 4px}.spin{width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--ink);border-radius:50%;animation:rot .7s linear infinite}@keyframes rot{to{transform:rotate(1turn)}}.material-symbols-outlined{font-variation-settings:"FILL" 0,"wght" 500,"GRAD" 0,"opsz" 24;line-height:1;-webkit-user-select:none;-moz-user-select:none;user-select:none;display:inline-block}.icon{vertical-align:middle}.brand .mark .material-symbols-outlined{font-size:14px;color:var(--surface)}.auth-card .logo .mark .material-symbols-outlined{font-size:22px;color:var(--surface)}.btn-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;border:none;background:transparent;color:var(--muted);cursor:pointer;transition:background .12s,color .12s}.btn-icon:hover{background:var(--hover);color:var(--ink)}.btn-icon.danger:hover{background:rgba(179,38,30,.08);color:var(--warn)}.btn-icon:disabled{opacity:.35;cursor:not-allowed}.search{position:relative}.search>.icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}.search>.input{padding-left:40px;border-radius:12px}.stat{display:flex;gap:14px}.stat,.stat .ic{align-items:center}.stat .ic{width:44px;height:44px;flex:0 0 auto;border-radius:12px;background:var(--hover);border:1px solid var(--line);display:inline-flex;justify-content:center;color:var(--ink)}.stat .num{font-size:24px;font-weight:700;letter-spacing:-.4px;line-height:1.1}.stat .lbl{font-size:12px;color:var(--muted);font-weight:600}