:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --background: #0c0d0f;
  --surface: #17191d;
  --surface-strong: #202329;
  --border: #30343c;
  --text: #f5f5f3;
  --muted: #a6abb4;
  --accent: #f49b43;
  --accent-hover: #ffad5c;
  --success: #69d28a;
  --danger: #ff7373;
  --warning: #efb75f;
  background: var(--background);
  color: var(--text);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(244, 155, 67, 0.14), transparent 34rem),
    linear-gradient(160deg, #111317 0%, var(--background) 48%);
}

button, input { font: inherit; }

.shell {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 40px 22px 72px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(2.3rem, 7vw, 4rem); line-height: 1; }
h2 { margin: 0; font-size: clamp(1.3rem, 4vw, 1.8rem); }
h3 { margin: 0; font-size: 1rem; }

.intro {
  max-width: 520px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(23, 25, 29, 0.96);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
}

.auth-layout {
  display: grid;
  min-height: calc(100vh - 112px);
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 430px);
  align-items: center;
  gap: 64px;
}

.brand-mark { display: block; margin-bottom: 18px; font-size: 3rem; }
.auth-panel { display: grid; gap: 20px; padding: 30px; }

label {
  display: grid;
  gap: 8px;
  color: #d9dce1;
  font-size: 0.9rem;
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  border: 1px solid #3a3f48;
  border-radius: 11px;
  outline: none;
  background: #0e1013;
  color: var(--text);
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(244, 155, 67, 0.24);
}

.button {
  display: inline-flex;
  min-height: 43px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 15px;
  border: 1px solid transparent;
  border-radius: 11px;
  background: var(--accent);
  color: #211207;
  font-weight: 800;
  cursor: pointer;
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.button:hover { background: var(--accent-hover); transform: translateY(-1px); }
.button:disabled { cursor: wait; opacity: 0.55; transform: none; }
.button.secondary { border-color: #464c56; background: #252930; color: var(--text); }
.button.ghost { border-color: #343942; background: transparent; color: #d9dce1; }
.button.danger { background: var(--danger); color: #280909; }
.button.small { min-height: 36px; padding: 7px 10px; font-size: 0.78rem; }

.message { min-height: 1.4em; margin: 0; color: var(--muted); line-height: 1.45; }
.message.error { color: var(--danger); }
.message.success { color: var(--success); }
.global-message { margin: 4px 0 18px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.topbar-actions { display: flex; align-items: center; gap: 10px; }
.identity { margin-right: 5px; color: var(--muted); font-size: 0.86rem; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.summary-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: linear-gradient(145deg, var(--surface-strong), var(--surface));
}

.summary-card span { display: block; color: var(--muted); font-size: 0.78rem; }
.summary-card strong { display: block; margin-top: 8px; font-size: 1.55rem; }
.summary-card strong.success { color: var(--success); }
.summary-card strong.warning { color: var(--warning); }

.section-heading { margin: 38px 2px 15px; }
.device-list { display: grid; gap: 16px; }

.device-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(23, 25, 29, 0.96);
}

.device-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 22px;
  border-bottom: 1px solid var(--border);
}

.device-title-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.device-meta { margin: 7px 0 0; color: var(--muted); font-size: 0.86rem; }
.device-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(105, 210, 138, 0.14);
  color: var(--success);
  font-size: 0.72rem;
  font-weight: 800;
}

.badge.offline, .badge.disabled { background: rgba(255, 115, 115, 0.12); color: var(--danger); }
.badge.neutral { background: rgba(166, 171, 180, 0.12); color: var(--muted); }

.device-body { display: grid; grid-template-columns: minmax(230px, 0.8fr) 1.5fr; }
.telemetry { padding: 22px; border-right: 1px solid var(--border); }
.telemetry-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 15px; }
.reading { padding: 11px; border-radius: 11px; background: #111317; }
.reading span { display: block; color: var(--muted); font-size: 0.7rem; }
.reading strong { display: block; margin-top: 4px; font-size: 1.05rem; }
.subtle { color: var(--muted); font-size: 0.82rem; line-height: 1.45; }

.installations { padding: 22px; }
.installation-list { display: grid; gap: 10px; margin-top: 15px; }
.installation {
  padding: 14px;
  border: 1px solid #30353d;
  border-radius: 13px;
  background: #111317;
}

.installation-header, .registration {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.installation-actions, .registration-actions { display: flex; flex-wrap: wrap; gap: 7px; }
.registration-list { display: grid; gap: 7px; margin-top: 12px; padding-top: 12px; border-top: 1px solid #2b3037; }
.registration { padding: 8px 0; }
.registration + .registration { border-top: 1px solid #24282e; }

.audit-panel { padding: 8px 20px; }
.audit-list { display: grid; }
.audit-row { display: grid; grid-template-columns: 160px 1fr auto; gap: 14px; padding: 13px 0; border-bottom: 1px solid #2c3037; }
.audit-row:last-child { border-bottom: 0; }
.audit-action { font-weight: 750; }
.audit-target, .audit-time { color: var(--muted); font-size: 0.8rem; }

.empty-state { padding: 25px; border: 1px dashed #3a4049; border-radius: 15px; color: var(--muted); text-align: center; }

.dialog {
  width: min(500px, calc(100% - 28px));
  padding: 0;
  border: 1px solid #404650;
  border-radius: 20px;
  background: #191c21;
  color: var(--text);
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.65);
}

.dialog::backdrop { background: rgba(0, 0, 0, 0.72); backdrop-filter: blur(4px); }
.dialog form, .pairing-dialog { display: grid; gap: 20px; padding: 25px; }
.dialog-description { margin: 9px 0 0; color: var(--muted); line-height: 1.55; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 9px; }
.pairing-code { color: var(--accent-hover); font-size: clamp(2.4rem, 12vw, 4rem); font-weight: 900; letter-spacing: 0.12em; }

@media (max-width: 900px) {
  .summary-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .device-body { grid-template-columns: 1fr; }
  .telemetry { border-right: 0; border-bottom: 1px solid var(--border); }
}

@media (max-width: 680px) {
  .shell { padding: 24px 14px 50px; }
  .auth-layout { min-height: auto; grid-template-columns: 1fr; gap: 35px; }
  .topbar, .device-header { align-items: stretch; flex-direction: column; }
  .topbar-actions, .device-actions { justify-content: flex-start; }
  .identity { width: 100%; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .installation-header, .registration { align-items: stretch; flex-direction: column; }
  .audit-row { grid-template-columns: 1fr; gap: 4px; }
}

@media (max-width: 430px) {
  .auth-panel { padding: 22px; }
  .topbar-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .identity { grid-column: 1 / -1; }
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .summary-card { padding: 14px; }
  .device-header, .telemetry, .installations { padding: 18px; }
  .device-actions .button, .installation-actions .button { flex: 1 1 auto; }
  .dialog-actions { flex-direction: column-reverse; }
  .dialog-actions .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}