:root {
  --bg: #0b1f33;
  --bg-2: #122b45;
  --panel: #183554;
  --ink: #e8f1fa;
  --muted: #9db4c9;
  --accent: #2dd4a8;
  --accent-2: #f0b429;
  --danger: #ff6b6b;
  --ok: #3ddea8;
  --line: rgba(255, 255, 255, 0.08);
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --display: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(45, 212, 168, 0.18), transparent 60%),
    radial-gradient(900px 400px at 100% 0%, rgba(240, 180, 41, 0.12), transparent 50%),
    linear-gradient(180deg, var(--bg), #071525 70%);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.lab-banner {
  background: #5a1d1d;
  color: #ffd7d7;
  text-align: center;
  font-size: 0.85rem;
  padding: 0.55rem 1rem;
  letter-spacing: 0.02em;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 24, 40, 0.55);
  backdrop-filter: blur(8px);
}
.brand {
  font-family: var(--display);
  font-size: 1.55rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.brand span { color: var(--accent); }
.badge {
  display: inline-block;
  margin-left: 0.5rem;
  font-family: var(--font);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  vertical-align: middle;
  letter-spacing: 0.04em;
}
.badge-vuln { background: #7a1f1f; color: #ffb4b4; }
.badge-safe { background: #145239; color: #9dffc8; }

nav { display: flex; flex-wrap: wrap; gap: 0.85rem; align-items: center; }
nav a { color: var(--muted); font-size: 0.95rem; }
nav a:hover { color: var(--ink); }
.user-chip { color: var(--accent-2); font-size: 0.9rem; }

.wrap { width: min(960px, 92vw); margin: 1.75rem auto 3rem; }
.hero {
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-family: var(--display);
  font-weight: 560;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin: 0 0 0.4rem;
  letter-spacing: -0.03em;
}
.hero p { margin: 0; color: var(--muted); max-width: 40rem; }

.panel {
  background: linear-gradient(180deg, rgba(24, 53, 84, 0.9), rgba(18, 43, 69, 0.95));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem 1.4rem;
  margin-bottom: 1.1rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}
.panel h2 {
  font-family: var(--display);
  font-size: 1.25rem;
  margin: 0 0 1rem;
  font-weight: 560;
}

.balance {
  font-family: var(--display);
  font-size: 2.4rem;
  color: var(--accent);
  margin: 0.2rem 0 0;
}
.muted { color: var(--muted); }

label { display: block; font-size: 0.85rem; color: var(--muted); margin: 0.7rem 0 0.3rem; }
input, select, textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(7, 21, 37, 0.7);
  color: var(--ink);
  font: inherit;
}
textarea { min-height: 90px; resize: vertical; }
button, .btn {
  display: inline-block;
  margin-top: 1rem;
  border: 0;
  border-radius: 8px;
  padding: 0.65rem 1.1rem;
  background: var(--accent);
  color: #062016;
  font-weight: 700;
  cursor: pointer;
  font: inherit;
}
button.secondary, .btn.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
button:hover, .btn:hover { filter: brightness(1.05); }

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.55rem 0.35rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }

.flash {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}
.flash.ok { background: rgba(61, 222, 168, 0.15); color: var(--ok); }
.flash.error { background: rgba(255, 107, 107, 0.15); color: #ffb0b0; }

.msg {
  border-left: 3px solid var(--accent-2);
  padding: 0.6rem 0.8rem;
  margin-bottom: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
}
.msg .meta { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.25rem; }

.auth-card { max-width: 420px; margin: 2rem auto; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

pre.preview {
  white-space: pre-wrap;
  word-break: break-word;
  background: #06111d;
  padding: 1rem;
  border-radius: 8px;
  font-size: 0.8rem;
  max-height: 320px;
  overflow: auto;
}
.avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  background: #0a1624;
}