:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-soft: #f8fafb;
  --text: #18202a;
  --muted: #657180;
  --border: #dce2e8;
  --primary: #145c5a;
  --primary-strong: #0d4745;
  --primary-soft: #e4f2f1;
  --danger: #a33b3b;
  --danger-soft: #fbe9e9;
  --warning: #8a5a09;
  --warning-soft: #fff3d7;
  --success: #276749;
  --success-soft: #e6f5ed;
  --shadow: 0 10px 28px rgba(24, 32, 42, .07);
  --radius: 14px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
button, input, select { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
.login-screen { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: radial-gradient(circle at 20% 10%, #d7eceb 0, transparent 35%), linear-gradient(135deg, #eff5f5, #f7f8fa); }
.login-card { width: min(440px, 100%); padding: 36px; background: rgba(255,255,255,.95); border: 1px solid rgba(255,255,255,.9); border-radius: 22px; box-shadow: 0 24px 70px rgba(23, 55, 64, .14); }
.login-card h1 { margin: 34px 0 6px; font-size: 2rem; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand strong, .user-chip strong { display: block; }
.brand small, .user-chip small { display: block; color: var(--muted); margin-top: 2px; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; background: var(--primary); color: white; font-weight: 800; letter-spacing: .04em; }
.brand-login .brand-mark { width: 48px; height: 48px; }
.muted { color: var(--muted); line-height: 1.55; }
.stack { display: grid; gap: 16px; margin-top: 24px; }
label { display: grid; gap: 7px; color: #3d4855; font-size: .88rem; font-weight: 650; }
input, select { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 9px; background: white; color: var(--text); outline: none; transition: border .15s, box-shadow .15s; }
input:focus, select:focus { border-color: #66a6a3; box-shadow: 0 0 0 3px rgba(20, 92, 90, .12); }
.button { border: 1px solid transparent; border-radius: 9px; padding: 10px 14px; font-weight: 700; transition: transform .12s, background .12s, border .12s; }
.button:active { transform: translateY(1px); }
.button.primary { background: var(--primary); color: white; }
.button.primary:hover { background: var(--primary-strong); }
.button.secondary { background: white; border-color: var(--border); color: var(--text); }
.button.secondary:hover, .button.ghost:hover { background: var(--surface-soft); }
.button.ghost { background: transparent; border-color: var(--border); color: var(--text); }
.button.danger { background: var(--danger-soft); color: var(--danger); }
.button.small { padding: 6px 9px; font-size: .78rem; }
.full { width: 100%; }
.form-error { color: var(--danger); margin: 0; font-size: .88rem; }
.app-shell { min-height: 100vh; display: grid; grid-template-columns: 250px 1fr; }
.sidebar { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 26px; padding: 24px 18px; background: #fff; border-right: 1px solid var(--border); }
.sidebar .brand { padding: 0 8px; }
.nav { display: grid; gap: 5px; }
.nav-item { display: flex; align-items: center; gap: 11px; width: 100%; border: 0; border-radius: 9px; padding: 11px 12px; background: transparent; color: #4d5967; text-align: left; font-weight: 680; }
.nav-item span { width: 20px; text-align: center; font-size: 1.05rem; }
.nav-item:hover { background: var(--surface-soft); color: var(--text); }
.nav-item.active { background: var(--primary-soft); color: var(--primary-strong); }
.sidebar-footer { margin-top: auto; display: grid; gap: 14px; }
.user-chip { display: flex; align-items: center; gap: 10px; padding: 10px; background: var(--surface-soft); border-radius: 11px; }
.avatar { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: #dcecea; color: var(--primary-strong); font-weight: 800; }
.workspace { min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 24px 30px; background: rgba(255,255,255,.88); border-bottom: 1px solid var(--border); backdrop-filter: blur(10px); }
.topbar h1 { margin: 0; font-size: 1.55rem; }
.topbar p { margin: 4px 0 0; color: var(--muted); }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.clock { min-width: 120px; color: var(--muted); font-size: .88rem; text-align: right; }
.content { padding: 26px 30px 50px; }
.view { display: none; }
.view.active { display: block; }
.toolbar { display: flex; align-items: end; justify-content: flex-end; gap: 10px; margin-bottom: 16px; }
.toolbar.wrap { justify-content: flex-start; flex-wrap: wrap; }
.compact { min-width: 160px; }
.metric-grid { display: grid; grid-template-columns: repeat(6, minmax(130px, 1fr)); gap: 14px; margin-bottom: 18px; }
.metric-card { padding: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.metric-card strong { display: block; font-size: 1.65rem; margin-top: 8px; }
.metric-card span { color: var(--muted); font-size: .82rem; text-transform: uppercase; letter-spacing: .05em; font-weight: 750; }
.two-column { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(280px, .75fr); gap: 18px; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; margin-bottom: 18px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 20px; border-bottom: 1px solid var(--border); }
.panel-heading h2 { margin: 0; font-size: 1.02rem; }
.panel-heading p { margin: 4px 0 0; color: var(--muted); font-size: .84rem; }
.form-panel summary { padding: 17px 20px; font-weight: 800; cursor: pointer; }
.form-panel[open] summary { border-bottom: 1px solid var(--border); }
.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; padding: 20px; }
.form-grid .wide { grid-column: span 2; }
.form-actions { display: flex; align-items: end; grid-column: 1 / -1; justify-content: flex-end; }
.checkbox { display: flex; grid-auto-flow: column; align-items: center; justify-content: start; gap: 8px; min-height: 40px; }
.checkbox input { width: auto; }
.notice { padding: 14px 16px; margin-bottom: 18px; border: 1px solid #bad8d6; background: var(--primary-soft); color: #214f4d; border-radius: 10px; line-height: 1.45; }
.table-wrap { width: 100%; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid #edf0f2; vertical-align: middle; }
th { color: var(--muted); background: #fbfcfd; font-size: .74rem; text-transform: uppercase; letter-spacing: .045em; white-space: nowrap; }
td { font-size: .88rem; }
tbody tr:hover { background: #fbfcfc; }
tbody tr:last-child td { border-bottom: 0; }
.search { width: min(260px, 100%); }
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 4px 8px; border-radius: 999px; font-size: .72rem; font-weight: 800; white-space: nowrap; }
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.warning { background: var(--warning-soft); color: var(--warning); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.neutral { background: #edf1f4; color: #56616f; }
.action-row { display: flex; gap: 6px; flex-wrap: wrap; }
.device-list { display: grid; }
.device-item { display: grid; grid-template-columns: auto 1fr; gap: 10px; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.device-item:last-child { border-bottom: 0; }
.status-dot { width: 10px; height: 10px; margin-top: 5px; border-radius: 50%; background: #9aa5b1; box-shadow: 0 0 0 4px #edf0f2; }
.status-dot.healthy { background: #3f9b6a; box-shadow: 0 0 0 4px #e6f5ed; }
.status-dot.error { background: #c45a5a; box-shadow: 0 0 0 4px #fbe9e9; }
.device-item strong { display: block; }
.device-item small { display: block; margin-top: 4px; color: var(--muted); line-height: 1.4; }
.empty { padding: 28px !important; color: var(--muted); text-align: center; }
.toast { position: fixed; z-index: 100; right: 24px; bottom: 24px; max-width: 380px; padding: 13px 16px; border-radius: 10px; background: #1d2935; color: white; box-shadow: 0 14px 34px rgba(0,0,0,.18); opacity: 0; transform: translateY(12px); pointer-events: none; transition: .2s ease; }
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { background: #8d3030; }
code.inline { padding: 2px 5px; background: #eef2f4; border-radius: 4px; font-size: .8rem; }
@media (max-width: 1180px) { .metric-grid { grid-template-columns: repeat(3, 1fr); } .two-column { grid-template-columns: 1fr; } .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 820px) { .app-shell { grid-template-columns: 1fr; } .sidebar { position: static; height: auto; } .nav { grid-template-columns: repeat(2, 1fr); } .sidebar-footer { margin-top: 0; } .topbar { padding: 18px; align-items: flex-start; } .content { padding: 18px; } .metric-grid { grid-template-columns: repeat(2, 1fr); } .form-grid { grid-template-columns: 1fr; } .form-grid .wide { grid-column: auto; } .clock { display: none; } }
@media (max-width: 520px) { .nav { grid-template-columns: 1fr; } .metric-grid { grid-template-columns: 1fr 1fr; } .topbar-actions { flex-direction: column; align-items: stretch; } .login-card { padding: 26px; } }