:root {
  --bg: #0a0e1a;
  --surface: #111827;
  --border: #1e293b;
  --text: #e2e8f0;
  --dim: #64748b;
  --cyan: #22d3ee;
  --green: #4ade80;
  --red: #f87171;
  --amber: #fbbf24;
  --purple: #a78bfa;
  --blue: #60a5fa;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text); font-family: -apple-system, 'Inter', sans-serif; line-height: 1.6; }
.mono { font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace; }

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 1rem; }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 0.75rem; padding: 1.5rem; margin-bottom: 1.5rem; }
.card-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.card-header h2 { font-size: 1.1rem; font-weight: 600; }

/* Tags */
.tag { font-size: 0.65rem; font-weight: 700; padding: 0.2rem 0.5rem; border-radius: 0.25rem; text-transform: uppercase; letter-spacing: 0.05em; }
.tag-cyan { background: rgba(34,211,238,0.15); color: var(--cyan); }
.tag-green { background: rgba(74,222,128,0.15); color: var(--green); }
.tag-purple { background: rgba(167,139,250,0.15); color: var(--purple); }
.tag-amber { background: rgba(251,191,36,0.15); color: var(--amber); }
.tag-red { background: rgba(248,113,113,0.15); color: var(--red); }
.tag-blue { background: rgba(96,165,250,0.15); color: var(--blue); }
.tag-dim { background: rgba(100,116,139,0.15); color: var(--dim); }

/* Terminal */
.terminal { background: #0f172a; color: var(--cyan); font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.78rem; line-height: 1.7; padding: 1rem 1.25rem; border-radius: 0.5rem; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.terminal .g { color: var(--green); }
.terminal .r { color: var(--red); }
.terminal .y { color: var(--amber); }
.terminal .d { color: var(--dim); }
.terminal .c { color: var(--cyan); }
.terminal .p { color: var(--purple); }
.terminal .b { color: var(--blue); }

/* Inputs & Buttons */
input, select { background: #1e293b; border: 1px solid #334155; border-radius: 0.375rem; padding: 0.5rem 0.75rem; color: var(--text); font-size: 0.85rem; outline: none; transition: border 0.2s; }
input:focus, select:focus { border-color: var(--cyan); }
input::placeholder { color: #475569; }
.btn { border: none; border-radius: 0.375rem; padding: 0.5rem 1.25rem; font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-cyan { background: #0891b2; color: white; }
.btn-cyan:hover:not(:disabled) { background: #06b6d4; }
.btn-green { background: #16a34a; color: white; }
.btn-green:hover:not(:disabled) { background: #22c55e; }
.btn-purple { background: #7c3aed; color: white; }
.btn-purple:hover:not(:disabled) { background: #8b5cf6; }
.btn-amber { background: #d97706; color: white; }
.btn-amber:hover:not(:disabled) { background: #f59e0b; }

/* Stat boxes */
.stat { text-align: center; padding: 1rem; }
.stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-label { font-size: 0.7rem; color: var(--dim); margin-top: 0.25rem; }

/* Steps */
.step-row { display: flex; align-items: center; gap: 0.5rem; padding: 0.3rem 0; font-family: 'SF Mono', monospace; font-size: 0.8rem; }
.step-icon { width: 1.25rem; text-align: center; }
.step-pass .step-icon { color: var(--green); }
.step-fail .step-icon { color: var(--red); }
.step-pending .step-icon { color: var(--amber); }

/* Flow diagram */
.flow { display: flex; align-items: center; justify-content: center; gap: 0.5rem; flex-wrap: wrap; padding: 1rem 0; }
.flow-node { background: #1e293b; border: 1px solid #334155; border-radius: 0.5rem; padding: 0.5rem 1rem; font-size: 0.75rem; text-align: center; }
.flow-node.active { border-color: var(--cyan); box-shadow: 0 0 12px rgba(34,211,238,0.2); }
.flow-arrow { color: var(--dim); font-size: 1.2rem; }

/* Animations */
.pulse { animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
.hidden { display: none !important; }

/* Problem cards */
.problem { padding: 0.75rem 1rem; border-left: 3px solid var(--dim); margin-bottom: 0.75rem; border-radius: 0 0.25rem 0.25rem 0; background: rgba(30,41,59,0.5); }
.problem-title { font-size: 0.8rem; font-weight: 600; margin-bottom: 0.25rem; }
.problem-current { font-size: 0.72rem; color: var(--red); }
.problem-bca { font-size: 0.72rem; color: var(--green); }

/* Wallet banner */
.wallet-banner { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 1.25rem; border-radius: 0.5rem; font-size: 0.8rem; margin-bottom: 1.5rem; }
.wallet-funded { background: rgba(74,222,128,0.1); border: 1px solid rgba(74,222,128,0.3); }
.wallet-empty { background: rgba(251,191,36,0.1); border: 1px solid rgba(251,191,36,0.3); }
.wallet-mock { background: rgba(100,116,139,0.1); border: 1px solid rgba(100,116,139,0.3); }

/* Step sections inside collapsed details */
.step-section { padding: 0.5rem 0; }
#stepByStep > summary { padding: 0.5rem 0; }
#stepByStep[open] > summary { margin-bottom: 0.5rem; border-bottom: 1px solid var(--border); padding-bottom: 1rem; }

/* FAQ */
details summary { list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary::before { content: '▸ '; color: var(--dim); }
details[open] summary::before { content: '▾ '; }
details summary:hover { color: white; }

/* Inline term explainers */
.term { border-bottom: 1px dotted var(--dim); cursor: help; position: relative; color: var(--text); }
.term:hover::after {
  content: attr(data-tip);
  position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  background: #1e293b; border: 1px solid #334155; color: var(--dim);
  padding: 0.5rem 0.75rem; border-radius: 0.375rem; font-size: 0.72rem;
  width: max-content; max-width: 320px; white-space: normal; line-height: 1.5;
  z-index: 10; pointer-events: none; box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}