:root {
  --bg: #0f1419;
  --bg-elevated: #1a222c;
  --bg-input: #12181f;
  --border: #2a3544;
  --text: #e8eef4;
  --muted: #8b9aab;
  --accent: #3d9cf0;
  --accent-hover: #5aaff5;
  --ok: #3ecf8e;
  --danger: #f07178;
  --warn: #e6b450;
  --radius: 10px;
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(61, 156, 240, 0.18), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(62, 207, 142, 0.08), transparent),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

.wrap {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover { text-decoration: none; color: var(--text); }

.nav { display: flex; gap: 1rem; font-size: 0.95rem; }

h1 { font-size: 1.5rem; margin: 0 0 0.35rem; letter-spacing: -0.02em; }
h2 { font-size: 1.1rem; margin: 0 0 1rem; }
.lead { color: var(--muted); margin: 0 0 1.5rem; }

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
}

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

input[type="text"],
input[type="password"],
input[type="number"],
input[type="url"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
  font: inherit;
  margin-bottom: 0.9rem;
}

input:focus, textarea:focus, select:focus {
  outline: 2px solid rgba(61, 156, 240, 0.45);
  border-color: var(--accent);
}

textarea {
  font-family: var(--mono);
  font-size: 0.85rem;
  min-height: 4.5rem;
  resize: vertical;
}

.field-hint {
  display: block;
  margin: -0.65rem 0 0.9rem;
  font-size: 0.78rem;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--accent);
  color: #041018;
}
.btn-primary:hover { background: var(--accent-hover); color: #041018; }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--muted); color: var(--text); }

.btn-danger {
  background: transparent;
  border-color: rgba(240, 113, 120, 0.5);
  color: var(--danger);
}
.btn-danger:hover { background: rgba(240, 113, 120, 0.12); }

.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; }

.alert {
  padding: 0.85rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  border: 1px solid;
}
.alert-ok { background: rgba(62, 207, 142, 0.1); border-color: rgba(62, 207, 142, 0.35); color: var(--ok); }
.alert-err { background: rgba(240, 113, 120, 0.1); border-color: rgba(240, 113, 120, 0.35); color: var(--danger); }
.alert-warn { background: rgba(230, 180, 80, 0.1); border-color: rgba(230, 180, 80, 0.35); color: var(--warn); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.7rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th { color: var(--muted); font-weight: 500; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }

.mono { font-family: var(--mono); font-size: 0.85rem; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }

.kv {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 0.35rem 0.75rem;
  font-size: 0.92rem;
}
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

pre.result {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  white-space: pre-wrap;
}

.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
  color: var(--text);
}
.check input { width: auto; margin: 0; }

.busy-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 12, 18, 0.72);
  backdrop-filter: blur(4px);
}
.busy-overlay[hidden] { display: none; }

.busy-box {
  width: min(22rem, calc(100% - 2rem));
  text-align: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
}

.busy-title {
  margin: 1rem 0 0.35rem;
  font-weight: 600;
}

.busy-sub { margin: 0; }

.spinner {
  width: 2.25rem;
  height: 2.25rem;
  margin: 0 auto;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

body.is-busy { overflow: hidden; }

.btn:disabled {
  opacity: 0.65;
  cursor: wait;
}