/* PAP Checker · the flow diagram (How it works). Three lanes, one row per step, caption in a panel
   below the diagram so nothing crosses the lanes. Mirrors flow.css in the PAP Checker Claude Design project. */
.flow{max-width:900px;margin:0 auto;background:var(--card);border:1px solid var(--rule);border-radius:14px;overflow:hidden}
.flow-diagram{position:relative;padding:20px 22px 14px}
.flow-lanes{position:absolute;inset:20px 22px 14px 22px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));pointer-events:none}
.flow-lane{position:relative;text-align:center}
.flow-lane::after{content:"";position:absolute;left:50%;top:30px;bottom:0;width:1px;background:var(--rule-2)}
.flow-who{display:inline-block;position:relative;z-index:1;font-weight:700;font-size:13.5px;background:var(--paper-2);border:1px solid var(--rule);border-radius:999px;padding:4px 12px}
.flow-steps{list-style:none;margin:0;padding:46px 0 0;position:relative}
.flow-step{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:7px 0;cursor:pointer;opacity:.22;transition:opacity .3s ease}
.flow-step.past{opacity:.5}
.flow-step.now{opacity:1}
.flow-msg{position:relative;display:flex;flex-direction:column;align-items:center;gap:7px;min-width:0}
.flow-msg.ab{grid-column:1/3;margin:0 25%}
.flow-msg.bc{grid-column:2/4;margin:0 25%}
.flow-label{max-width:92%;font-family:var(--mono);font-size:12.5px;line-height:1.4;color:var(--ink);text-align:center}
/* one step number, fixed in the top-left corner of the box; it changes as the flow plays */
.flow-num{position:absolute;top:16px;left:18px;z-index:2;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-family:var(--mono);font-size:14px;font-weight:600;color:#fff;background:var(--accent);box-shadow:0 0 0 4px var(--card)}
.flow-arrow{display:block;width:100%;height:2px;background:var(--ink);position:relative}
.flow-arrow::after{content:"";position:absolute;top:-4px;border:5px solid transparent}
.flow-msg.r .flow-arrow::after{right:-2px;border-left:8px solid var(--ink);border-right:0}
.flow-msg.l .flow-arrow::after{left:-2px;border-right:8px solid var(--ink);border-left:0}
.flow-step.now .flow-arrow{background:var(--accent)}
.flow-step.now .flow-msg.r .flow-arrow::after{border-left-color:var(--accent)}
.flow-step.now .flow-msg.l .flow-arrow::after{border-right-color:var(--accent)}
.flow-panel{border-top:1px solid var(--rule);background:var(--paper);padding:16px 22px 14px}
.flow-cap{display:grid;grid-template-columns:auto minmax(0,1fr);gap:4px 14px;align-items:baseline;min-height:56px}
.flow-of{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.flow-text{color:var(--ink);font-size:15.5px;line-height:1.5}
.flow-meta{grid-column:2;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.flow-meta [hidden]{display:none}
.flow-ref{font-family:var(--mono);font-size:12px;color:var(--muted)}
.flow-controls{display:flex;align-items:center;gap:8px;margin-top:12px}
.flow-btn{font:inherit;font-size:13px;font-weight:600;border:1px solid var(--rule-2);background:var(--card);color:var(--ink);border-radius:8px;padding:5px 11px;cursor:pointer;min-width:38px}
.flow-btn:hover{background:var(--paper-2)}
.flow-dots{display:flex;gap:6px;margin-left:auto;align-items:center}
.flow-dot{display:block;width:8px;height:8px;min-width:0;border-radius:4px;border:0;padding:0;background:var(--rule-2);cursor:pointer;transition:width .25s ease,background .25s ease}
.flow-dot.past{background:var(--muted)}
.flow-dot.now{background:var(--accent);width:20px}
@media (max-width:640px){.flow-diagram{padding:16px 8px 10px}.flow-lanes{inset:16px 8px 10px 8px}.flow-who{font-size:11px;padding:3px 7px}.flow-label{font-size:11px}.flow-num{top:10px;left:8px;width:26px;height:26px;font-size:12px}.flow-cap{grid-template-columns:1fr}.flow-meta{grid-column:1}.flow-dots{gap:4px}}
@media (prefers-reduced-motion:reduce){.flow-step,.flow-dot{transition:none}}