:root {
  --bg: #0b1220;
  --panel: #152238;
  --panel-2: #1b2b45;
  --text: #e8eef8;
  --muted: #93a4bd;
  --accent: #3db8ff;
  --accent-2: #1f8fd8;
  --danger: #ff6b7a;
  --ok: #3dd68c;
  --border: #2a3b55;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --font: "Trebuchet MS", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(900px 420px at 0% 0%, rgba(61, 184, 255, 0.18), transparent 60%),
    radial-gradient(700px 380px at 100% 10%, rgba(61, 214, 140, 0.08), transparent 55%),
    linear-gradient(180deg, #0e1730, var(--bg));
}

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

#app { min-height: 100%; }

.shell {
  display: grid;
  grid-template-columns: 250px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: rgba(11, 18, 32, 0.92);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.brand {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.nav-link {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  color: var(--muted);
  margin-bottom: 0.2rem;
}
.nav-link:hover, .nav-link.active {
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
}

.main { padding: 1.25rem 1.5rem 2rem; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 1rem;
}

.card {
  background: rgba(21, 34, 56, 0.9);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.auth-card { width: min(440px, 100%); }

h1, h2, h3 { margin: 0 0 0.75rem; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin: 0.5rem 0; }
.ok { color: var(--ok); margin: 0.5rem 0; }

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.35rem 0 0.3rem;
}

input, select, textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0a1424;
  color: var(--text);
  margin-bottom: 0.65rem;
}

button, .btn {
  appearance: none;
  border: 0;
  border-radius: 8px;
  padding: 0.65rem 1rem;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: #041525;
  font-weight: 700;
  cursor: pointer;
}
button.secondary, .btn.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
button.danger { background: var(--danger); color: #2a0610; }
button:disabled { opacity: 0.55; cursor: not-allowed; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 0.6rem 0.45rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
  vertical-align: top;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: 10px;
  z-index: 100;
  box-shadow: var(--shadow);
}

.captcha-box {
  background: #f1f5f9;
  border-radius: 8px;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  overflow: auto;
}

.stack { display: grid; gap: 0.75rem; }
.row-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .grid-2 { grid-template-columns: 1fr; }
}