:root {
  color-scheme: dark;
  --bg: #0d1117;
  --surface: #151a23;
  --card: #1e2430;
  --border: #2d3748;
  --muted: #a0aebc;
  --text: #e5e9f2;
  --primary: #165dff;
  --cyan: #0fc6c2;
  --purple: #722ed1;
  --danger: #ff6b81;
  --success: #00b42a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 0%, rgba(15, 198, 194, .16), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(22, 93, 255, .14), transparent 30%),
    var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

.shell {
  display: grid;
  grid-template-columns: 248px 1fr;
  min-height: 100vh;
}

.side {
  padding: 24px 18px;
  border-right: 1px solid rgba(45, 55, 72, .8);
  background: rgba(13, 17, 23, .72);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 8px 24px;
}

.brand strong {
  font-size: 20px;
  letter-spacing: 0;
}

.brand span {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  text-align: left;
  padding: 0 12px;
}

.nav button.active,
.nav button:hover {
  color: var(--text);
  border-color: rgba(15, 198, 194, .28);
  background: rgba(15, 198, 194, .08);
}

.main {
  padding: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 22px;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 28px;
}

.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 16px;
}

.stats {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.panel,
.stat,
.login-box {
  border: 1px solid rgba(45, 55, 72, .9);
  background: rgba(21, 26, 35, .72);
  border-radius: 8px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .18);
}

.panel {
  padding: 18px;
}

.stat {
  padding: 18px;
}

.stat strong {
  display: block;
  font-size: 28px;
  margin-top: 8px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0;
}

.btn {
  min-height: 38px;
  border: 1px solid rgba(45, 55, 72, .9);
  border-radius: 8px;
  padding: 0 14px;
  color: var(--text);
  background: rgba(30, 36, 48, .9);
  cursor: pointer;
}

.btn.primary {
  border-color: rgba(22, 93, 255, .9);
  background: linear-gradient(135deg, var(--primary), #0b7cff);
}

.btn.danger {
  color: #ffd5dc;
  border-color: rgba(255, 107, 129, .5);
}

.form {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  color: var(--muted);
  font-size: 12px;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid rgba(45, 55, 72, .9);
  border-radius: 8px;
  background: rgba(13, 17, 23, .82);
  color: var(--text);
  padding: 11px 12px;
  outline: none;
}

textarea {
  min-height: 130px;
  resize: vertical;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px 10px;
  border-bottom: 1px solid rgba(45, 55, 72, .75);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 500;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  background: rgba(15, 198, 194, .1);
  color: #a6fffb;
  border: 1px solid rgba(15, 198, 194, .25);
  font-size: 12px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  gap: 16px;
}

.login {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}

.login-stack {
  width: min(900px, 100%);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.login-stack.single {
  width: min(460px, 100%);
  grid-template-columns: 1fr;
}

.login-box {
  padding: 24px;
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  max-width: 360px;
  padding: 12px 14px;
  border: 1px solid rgba(15, 198, 194, .28);
  border-radius: 8px;
  background: rgba(21, 26, 35, .96);
  color: var(--text);
  transform: translateY(16px);
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
}

.toast.show {
  transform: none;
  opacity: 1;
}

.hide {
  display: none !important;
}

@media (max-width: 920px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .side {
    position: sticky;
    top: 0;
    z-index: 2;
    padding: 14px;
  }

  .brand {
    padding-bottom: 12px;
  }

  .nav {
    display: flex;
    overflow-x: auto;
  }

  .nav button {
    white-space: nowrap;
  }

  .main {
    padding: 18px;
  }

  .stats,
  .split,
  .login-stack {
    grid-template-columns: 1fr;
  }
}