:root {
  --bg: #0f1724;
  --panel: #161f2e;
  --panel-2: #1d293a;
  --panel-3: #101827;
  --line: #2d3b50;
  --text: #ecf3fb;
  --muted: #9fb0c4;
  --brand: #25bde4;
  --ok: #54d18a;
  --warn: #f8c76d;
  --danger: #f57474;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top left, rgba(37,189,228,.16), transparent 34%), var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, sans-serif;
}
.shell { padding: clamp(20px, 4vw, 56px); }
.login, .dashboard {
  width: min(1380px, 100%);
  margin: 0 auto;
  background: rgba(22,31,46,.96);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(20px, 4vw, 40px);
  box-shadow: 0 24px 80px rgba(0,0,0,.24);
}
.login { max-width: 460px; margin-top: 8vh; }
.hidden { display: none; }
.eyebrow { color: var(--brand); text-transform: uppercase; letter-spacing: .1em; font-size: 12px; font-weight: 900; }
h1, h2, h3 { margin: 0; }
h1 { margin: 6px 0 10px; font-size: clamp(30px, 5vw, 48px); }
h2 { font-size: 24px; }
h3 { font-size: 17px; margin-bottom: 14px; }
p { color: var(--muted); line-height: 1.45; }
label { display: block; color: var(--muted); font-weight: 700; margin: 14px 0; }
input, select {
  width: 100%;
  margin-top: 6px;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 12px;
  padding: 13px;
  font: inherit;
}
button {
  border: 0;
  border-radius: 12px;
  background: var(--brand);
  color: #061019;
  padding: 12px 16px;
  font-weight: 900;
  cursor: pointer;
}
button.ghost {
  background: transparent;
  color: var(--brand);
  border: 1px solid rgba(37,189,228,.35);
}
button.danger {
  background: var(--danger);
  color: #270608;
}
button.ghost-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid rgba(245,116,116,.4);
}
header { display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.summary { display: flex; flex-wrap: wrap; gap: 12px; color: var(--muted); margin: 18px 0; }
.summary span { background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px; padding: 9px 12px; }
.summary strong { color: var(--text); }
.layout { display: grid; grid-template-columns: minmax(320px, 440px) 1fr; gap: 18px; align-items: start; }
.cards { display: grid; gap: 14px; }
.card, .details, .panel {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.card {
  padding: 18px;
}
.card.selected {
  border-color: var(--brand);
  box-shadow: 0 0 0 1px rgba(37,189,228,.18);
}
.card-top, .detail-head, .actions, .device {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.actions { margin-top: 14px; }
.actions.wrap { justify-content: flex-start; flex-wrap: wrap; }
.status, .license {
  display: inline-block;
  border-radius: 999px;
  padding: 5px 10px;
  font-weight: 900;
  font-size: 12px;
  white-space: nowrap;
}
.online, .active { background: rgba(84,209,138,.16); color: var(--ok); }
.offline, .blocked, .expired { background: rgba(245,116,116,.16); color: var(--danger); }
.suspended { background: rgba(248,199,109,.16); color: var(--warn); }
.details { min-height: 520px; padding: 20px; }
.empty { min-height: 420px; display: grid; place-content: center; text-align: center; }
.detail-head { align-items: flex-start; margin-bottom: 16px; }
.metrics { display: grid; grid-template-columns: repeat(4, minmax(130px, 1fr)); gap: 10px; margin: 16px 0; }
.metrics article {
  background: var(--panel-3);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
}
.metrics span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; }
.metrics strong { display: block; margin-top: 6px; font-size: 18px; }
.panel { padding: 18px; margin-top: 14px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.span-2 { grid-column: span 2; }
.device-create { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: end; }
.devices { display: grid; gap: 10px; margin-top: 12px; }
.device { background: var(--panel-3); border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.device p { margin: 4px 0 0; }
.token-box {
  margin-top: 12px;
  padding: 14px;
  background: #09111d;
  border: 1px solid rgba(37,189,228,.35);
  border-radius: 14px;
}
code {
  display: block;
  margin-top: 8px;
  overflow-wrap: anywhere;
  color: var(--brand);
}
.error { color: var(--danger); }

@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  header, .detail-head, .card-top, .actions, .device { align-items: stretch; flex-direction: column; }
  .form-grid, .device-create, .metrics { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  button { width: 100%; }
}