:root {
  --bg: #070b14;
  --panel: #0d1526;
  --panel-2: #101b31;
  --border: #1d2c49;
  --text: #dbe6f7;
  --dim: #6b7fa3;
  --accent: #4f8cff;
  --accent-2: #9a6bff;
  --ok: #3ddc97;
  --warn: #ffd166;
  --err: #ff6b6b;
  --mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular,
    Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 600px at 80% -10%, #12224a 0%, transparent 55%),
    radial-gradient(900px 500px at 10% 0%, #241a4a 0%, transparent 50%), var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  line-height: 1.55;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.hero { text-align: center; margin-bottom: 32px; }

.logo {
  font-size: 52px;
  line-height: 1;
  margin-bottom: 8px;
  filter: drop-shadow(0 0 18px rgba(79, 140, 255, 0.35));
}

h1 {
  margin: 0 0 6px;
  font-size: 34px;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline { font-size: 20px; margin: 0 0 10px; color: var(--text); }
.tagline em { color: var(--accent); font-style: normal; }
.sub { color: var(--dim); max-width: 620px; margin: 0 auto; font-size: 15px; }
.sub b { color: var(--text); }

.controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 15px;
  cursor: pointer;
  color: var(--text);
  background: var(--panel);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

.btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.55; cursor: wait; transform: none; }

.btn-primary {
  background: linear-gradient(90deg, #2457c9, #6a3fd4);
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(79, 140, 255, 0.25);
}

.btn-github {
  background: var(--panel-2);
  font-weight: 600;
}

.terminal {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  margin-bottom: 40px;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}

.dot { width: 10px; height: 10px; border-radius: 50%; background: #3a4b6d; }
.dot:nth-child(1) { background: var(--err); }
.dot:nth-child(2) { background: var(--warn); }
.dot:nth-child(3) { background: var(--ok); }

.terminal-title {
  margin-left: 8px;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 12px;
}

.terminal-body {
  margin: 0;
  padding: 18px 20px 22px;
  min-height: 300px;
  max-height: 480px;
  overflow-y: auto;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-body .dim { color: var(--dim); }
.terminal-body .ok { color: var(--ok); }
.terminal-body .warn { color: var(--warn); }
.terminal-body .err { color: var(--err); }
.terminal-body .accent { color: var(--accent); }
.terminal-body .bold { color: var(--text); font-weight: 700; }

.cursor::after {
  content: "▍";
  color: var(--accent);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.boundary { margin-bottom: 40px; }

.boundary h2, .cards h3 {
  text-align: center;
  color: var(--text);
  letter-spacing: 0.4px;
}

.boundary h2 { font-size: 22px; margin: 0 0 18px; }

.flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.node {
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 14px;
  text-align: center;
  min-width: 220px;
}

.node small { color: var(--dim); }
.node.untrusted {
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.35);
}
.node.trusted {
  background: rgba(61, 220, 151, 0.08);
  border: 1px solid rgba(61, 220, 151, 0.35);
}

.arrow { color: var(--dim); font-size: 13px; }

.line {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 1px;
  margin: 6px 0;
  border-top: 1px dashed rgba(79, 140, 255, 0.5);
  padding-top: 6px;
  width: 100%;
  text-align: center;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.card h3 { margin: 0 0 8px; font-size: 16px; text-align: left; }
.card p { margin: 0; color: var(--dim); font-size: 14px; }

.cta { text-align: center; margin-bottom: 32px; }

.foot {
  text-align: center;
  color: var(--dim);
  font-size: 13px;
}

@media (max-width: 560px) {
  .wrap { padding-top: 32px; }
  h1 { font-size: 27px; }
  .terminal-body { min-height: 260px; }
  .node { min-width: 180px; }
}