:root {
  --bg: #0f1419;
  --bg-elevated: #1a222d;
  --bg-soft: #243041;
  --line: #314257;
  --text: #e8eef6;
  --muted: #8fa3b8;
  --accent: #25d366;
  --accent-dim: #1fa855;
  --danger: #ef5b5b;
  --warn: #e6b84d;
  --radius: 14px;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1e3a2f 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #1a2a44 0%, transparent 50%),
    var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand strong {
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}

.brand span {
  color: var(--muted);
  font-size: 0.9rem;
}

.nav {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.nav a,
.nav button {
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  font: inherit;
  cursor: pointer;
}

.nav a.active,
.nav a:hover,
.nav button:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.panel {
  background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  backdrop-filter: blur(8px);
}

.panel h1,
.panel h2 {
  margin: 0 0 0.5rem;
  font-weight: 650;
}

.panel p.lead {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.25rem;
}

@media (max-width: 800px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  margin: 0.85rem 0 0.35rem;
  color: var(--muted);
  font-size: 0.9rem;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  font: inherit;
}

input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 55%, transparent);
  border-color: var(--accent);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

button.btn {
  border: 0;
  border-radius: 10px;
  padding: 0.75rem 1.1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

button.btn-primary {
  background: var(--accent);
  color: #07361a;
}

button.btn-primary:hover:not(:disabled) {
  background: var(--accent-dim);
}

button.btn-secondary {
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--line);
}

button.btn-danger {
  background: color-mix(in srgb, var(--danger) 25%, var(--bg-soft));
  color: #ffd7d7;
  border: 1px solid color-mix(in srgb, var(--danger) 50%, var(--line));
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.status-pill::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--muted);
}

.status-pill.connected::before {
  background: var(--accent);
}

.status-pill.qr::before,
.status-pill.connecting::before {
  background: var(--warn);
}

.status-pill.disconnected::before {
  background: var(--danger);
}

.qr-box {
  display: grid;
  place-items: center;
  min-height: 340px;
  background: #fff;
  border-radius: 12px;
  color: #111;
  padding: 1rem;
}

.qr-box img {
  width: min(280px, 100%);
  height: auto;
}

.qr-placeholder {
  color: #556;
  text-align: center;
  padding: 1rem;
}

.meta {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.alert {
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--danger) 18%, var(--bg-soft));
  border: 1px solid color-mix(in srgb, var(--danger) 45%, var(--line));
  color: #ffd0d0;
}

.success {
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 16%, var(--bg-soft));
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
  color: #c9f7dc;
}

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.login-card {
  width: min(420px, 100%);
}

.login-card .brand {
  margin-bottom: 1.25rem;
}

.hidden {
  display: none !important;
}