.skill-shell { padding-bottom: max(60px, env(safe-area-inset-bottom)); }
.skill-masthead h1 { max-width: 820px; font-size: clamp(38px, 6vw, 66px); }

.skill-nav {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  background: #dfe4dd;
}

.skill-nav .button { text-decoration: none; }
.skill-workspace { overflow: hidden; }
.compatibility-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 28px; }

.skill-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line-strong);
  background: var(--paper-strong);
  box-shadow: 6px 6px 0 #cfd6cf;
}

.skill-card-signal { border-color: var(--device); box-shadow: 6px 6px 0 var(--signal); }
.skill-card h3 { margin-top: 18px; font-size: 24px; }
.skill-card p { color: var(--muted); }
.card-index { color: var(--success); font: 800 11px/1 "DIN Alternate", "Avenir Next", sans-serif; letter-spacing: .14em; }

.skill-step { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 16px; padding: 32px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 30px; }
.prompt-box { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: start; margin-top: 14px; padding: 18px; color: #d9e7de; background: #101713; }
.prompt-box code { min-width: 0; color: inherit; font: 13px/1.7 ui-monospace, "SFMono-Regular", monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.prompt-box .copy-button { border-color: #5b6c63; color: white; background: #1d2923; white-space: nowrap; }
.prompt-box .copy-button:hover { border-color: var(--signal); background: var(--device); }
.skill-source { margin: 10px 0 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.skill-source a { color: var(--success); font-weight: 750; }
.outcome-step { padding-bottom: 42px; border-bottom: 0; }
.outcome-step > .step-body > h3 { margin-bottom: 14px; font-size: clamp(25px, 3vw, 34px); }
.outcome-thesis { margin: 0 0 28px; padding: 18px 20px; border-left: 5px solid var(--signal); color: #eef7f1; background: var(--device); font-size: clamp(16px, 2vw, 19px); font-weight: 750; line-height: 1.65; }
.outcome-block { min-width: 0; margin-top: 26px; }
.outcome-block h4 { margin: 0 0 14px; scroll-margin-top: 100px; font: 800 18px/1.25 "DIN Alternate", "Avenir Next", "PingFang SC", sans-serif; text-wrap: balance; }
.agent-flow { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; margin: 0; padding: 1px; list-style: none; background: var(--line-strong); }
.agent-flow li { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 9px; min-width: 0; padding: 16px 14px; background: var(--paper-strong); }
.agent-flow li > span { color: var(--success); font: 800 12px/1.4 "DIN Alternate", "Avenir Next", sans-serif; font-variant-numeric: tabular-nums; }
.agent-flow strong { display: block; line-height: 1.35; }
.agent-flow p { margin: 7px 0 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
.permission-note { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.change-grid { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: 14px; }
.change-card { min-width: 0; padding: 20px; border: 1px solid var(--line-strong); background: var(--paper-strong); }
.change-card-before { color: var(--muted); background: #e6ebe5; }
.change-card-after { border-color: var(--device); box-shadow: 5px 5px 0 var(--signal); }
.change-card h5 { margin: 14px 0 8px; color: var(--ink); font-size: 19px; line-height: 1.3; text-wrap: balance; }
.change-card p { margin: 8px 0 0; line-height: 1.6; }
.technical-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.technical-card, .unchanged-card { padding: 20px; border: 1px solid var(--line-strong); background: #eef1ed; }
.technical-card p { color: var(--muted); line-height: 1.6; }
.technical-card pre { min-height: 0; margin: 14px 0; padding: 16px; color: #d9e7de; background: #101713; font-size: 12px; line-height: 1.65; white-space: pre-wrap; overflow-wrap: anywhere; }
.unchanged-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.unchanged-list li { position: relative; padding-left: 20px; color: var(--muted); line-height: 1.55; }
.unchanged-list li::before { position: absolute; top: .58em; left: 0; width: 9px; height: 9px; border: 2px solid var(--device); content: ""; }
.download-panel { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr); gap: 30px; align-items: center; margin: 32px -42px -42px; padding: 32px 42px; border-top: 1px solid var(--device); background: #e7ece5; }
.download-panel h2 { font-size: clamp(27px, 4vw, 38px); }
.download-panel p:last-child { color: var(--muted); }
.download-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.download-actions .button { justify-content: center; text-align: center; text-decoration: none; }
.download-actions .button:first-child { grid-column: 1 / -1; }
.copy-status { min-height: 1.5em; margin: 14px 0 0; color: var(--success); font-weight: 750; }
.skill-footer { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; overflow-wrap: anywhere; }
.skill-footer a { color: var(--success); }

@media (max-width: 820px) {
  .agent-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .technical-grid { grid-template-columns: 1fr; }
  .download-panel { grid-template-columns: 1fr; margin-inline: -22px; margin-bottom: -22px; padding-inline: 22px; }
}

@media (max-width: 620px) {
  .skill-masthead h1 { font-size: 38px; }
  .skill-nav { align-items: stretch; flex-direction: column; }
  .skill-nav .scope-chip { align-self: start; }
  .compatibility-grid { grid-template-columns: 1fr; }
  .skill-step { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; }
  .prompt-box { grid-template-columns: 1fr; }
  .prompt-box .copy-button { width: 100%; }
  .outcome-thesis { padding: 16px; }
  .agent-flow, .change-grid { grid-template-columns: 1fr; }
  .agent-flow li { grid-template-columns: 28px minmax(0, 1fr); }
  .change-card-after { box-shadow: 4px 4px 0 var(--signal); }
  .technical-card, .unchanged-card { padding: 16px; }
  .download-actions { grid-template-columns: 1fr; }
  .download-actions .button:first-child { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .prompt-box .copy-button { transition: none; }
}