/* NXT AI - product stylesheet. Loaded only on NXT AI pages (layout.ts adds /assets/p/ai.css after the
   shared layers). Personality: intelligent, futuristic, adaptive, technical - an AI operating
   environment (console, model tiers, tool strip, results), not a chat window. Tokens only. */

@layer product {
  /* ---------- Shared bits ---------- */
  .p-ai { --ai-glow: color-mix(in srgb, var(--pa) 55%, transparent); }
  .ai-orbit { position: relative; display: inline-block; flex: none; width: 44px; height: 44px; }
  .ai-orbit i { position: absolute; inset: 0; border: 1px solid color-mix(in srgb, var(--pa) 55%, transparent); border-radius: 50%; }
  .ai-orbit i:nth-child(2) { inset: 7px; border-color: color-mix(in srgb, var(--p) 70%, transparent); }
  .ai-orbit i:nth-child(3) { inset: 15px; background: radial-gradient(circle at 35% 35%, var(--pa), var(--p) 70%); border: 0; box-shadow: 0 0 18px var(--ai-glow); }
  .ai-orbit b { position: absolute; top: -2px; left: 50%; width: 6px; height: 6px; margin-left: -3px; border-radius: 2px; background: var(--pa); transform-origin: 3px 24px; animation: ai-orbit 6s linear infinite; }
  .ai-orbit.is-small { width: 20px; height: 20px; }
  .ai-orbit.is-small i:nth-child(2) { inset: 3px; }
  .ai-orbit.is-small i:nth-child(3) { inset: 6px; box-shadow: 0 0 8px var(--ai-glow); }
  .ai-orbit.is-small b { width: 4px; height: 4px; margin-left: -2px; top: -1px; transform-origin: 2px 11px; }
  @keyframes ai-orbit { to { transform: rotate(360deg); } }

  .ai-card { border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); padding: var(--s-5); min-width: 0; }
  .ai-card-head { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-4); align-items: baseline; justify-content: space-between; margin-bottom: var(--s-4); }
  .ai-card-head h2 { font: 600 var(--t-h4)/1.3 var(--font-sans); margin: 0; }
  .ai-card-head p { margin: 2px 0 0; }
  .ai-chip { display: inline-flex; align-items: center; padding: 1px 8px; border-radius: var(--r-xs); font: 500 var(--t-caption)/18px var(--font-mono); color: var(--c-link); background: var(--c-primary-soft); white-space: nowrap; }

  /* ---------- Workspace grid ---------- */
  .ai-os { display: grid; gap: var(--s-5); grid-template-columns: minmax(0, 1fr); align-items: start; }
  .ai-os-main, .ai-os-side { display: grid; gap: var(--s-5); min-width: 0; }
  @media (min-width: 1180px) { .ai-os { grid-template-columns: minmax(0, 1fr) 320px; } .ai-os-side { position: sticky; top: calc(var(--layout-header) + var(--s-4)); } }
  .ai-os-side .onboarding { margin: 0; }

  /* ---------- Console (the "new session" surface) ---------- */
  .ai-console { position: relative; overflow: hidden; isolation: isolate; display: grid; gap: var(--s-5); padding: clamp(var(--s-5), 3vw, var(--s-8)); border-radius: var(--r-xl); background: var(--p2); color: #fff; box-shadow: var(--e-2);
    --c-text: #fff; --p: #FFFFFF; --pa: #FFFFFF; --pon: #000000; --c-primary: #FFFFFF; --c-on-primary: #000000; --c-primary-hover: #D6D6D6; --c-accent: #FFFFFF; --c-muted: rgb(255 255 255 / 0.76); --c-border: rgb(255 255 255 / 0.16); --c-border-strong: rgb(255 255 255 / 0.3); --c-surface: rgb(255 255 255 / 0.07); --c-surface2: rgb(0 0 0 / 0.25); --c-bg: rgb(7 7 7 / 0.45); --c-link: #fff; --c-focus: #FFFFFF; --c-focus-inner: #000000; --c-primary-soft: rgb(255 255 255 / 0.1); color-scheme: dark; }
  .ai-console::before { content: ''; position: absolute; inset: 0; z-index: -1; background: radial-gradient(70% 90% at 100% 0%, rgb(255 255 255 / 0.14), transparent 70%), radial-gradient(40% 60% at 0% 100%, rgb(255 255 255 / 0.06), transparent 70%); }
  .ai-console::after { content: ''; position: absolute; inset: 0; z-index: -1; opacity: 0.18; background-image: radial-gradient(rgb(255 255 255 / 0.5) 1px, transparent 1px); background-size: 22px 22px; mask-image: linear-gradient(115deg, transparent 40%, #000); }
  .ai-console-head { display: flex; gap: var(--s-4); align-items: center; }
  .ai-console-head h2 { margin: 0; font: 640 clamp(1.25rem, 1rem + 1vw, 1.625rem)/1.2 var(--font-display); letter-spacing: -0.02em; color: #fff; }
  .ai-console-head p { margin: 2px 0 0; color: var(--c-muted); font-size: var(--t-small); }
  .ai-console-form { display: grid; gap: var(--s-4); }
  .ai-console textarea { background: rgb(5 5 5 / 0.5); border-color: rgb(255 255 255 / 0.18); color: #fff; font-size: 1rem; min-height: 8.5rem; }
  .ai-console textarea::placeholder { color: rgb(255 255 255 / 0.5); }
  .ai-console textarea:focus { border-color: var(--pa); box-shadow: 0 0 0 3px color-mix(in srgb, var(--pa) 30%, transparent); }
  .ai-console .field > label { color: #fff; }
  .ai-console-foot { display: flex; flex-wrap: wrap; gap: var(--s-3); align-items: flex-end; justify-content: space-between; }
  .ai-console-foot .ai-tiers { flex: 1 1 420px; }
  .ai-console .ai-send { --b-bg: #fff; --b-fg: var(--p2); --b-hover: rgb(255 255 255 / 0.88); }
  .ai-console-tools { display: grid; gap: var(--s-2); padding-top: var(--s-4); border-top: 1px solid rgb(255 255 255 / 0.12); }
  .ai-console-tools .overline { margin: 0; color: var(--c-muted); }

  /* ---------- Model tier picker (radio cards) ---------- */
  .ai-tiers { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr)); gap: var(--s-2); border: 0; padding: 0; margin: 0; min-width: 0; }
  .ai-tiers-legend { grid-column: 1 / -1; padding: 0; margin-bottom: var(--s-2); font-weight: 600; font-size: var(--t-small); }
  .ai-tier { position: relative; display: block; min-width: 0; cursor: pointer; }
  .ai-tier input { position: absolute; opacity: 0; width: 1px; height: 1px; }
  .ai-tier-body { display: grid; gap: 4px; height: 100%; padding: 10px 12px; border: 1px solid var(--c-border-strong); border-radius: var(--r-md); background: var(--c-surface); transition: border-color var(--d-fast), background-color var(--d-fast), box-shadow var(--d-fast); }
  .ai-tier:hover .ai-tier-body { border-color: var(--c-link); }
  .ai-tier input:checked + .ai-tier-body { border-color: var(--c-primary); background: var(--c-primary-soft); box-shadow: inset 0 0 0 1px var(--c-primary); }
  .ai-console .ai-tier input:checked + .ai-tier-body { border-color: var(--pa); box-shadow: inset 0 0 0 1px var(--pa); }
  .ai-tier input:focus-visible + .ai-tier-body { outline: 2px solid var(--c-focus); outline-offset: 2px; }
  .ai-tier.is-locked { cursor: not-allowed; }
  .ai-tier.is-locked .ai-tier-body { opacity: 0.62; border-style: dashed; }
  .ai-tier-head { display: flex; align-items: center; gap: 8px; min-width: 0; }
  .ai-tier-name { font-weight: 650; font-size: var(--t-small); }
  .ai-tier-lock { margin-left: auto; display: inline-flex; align-items: center; gap: 3px; font-size: var(--t-caption); color: var(--c-muted); }
  .ai-tier-note { font-size: var(--t-caption); color: var(--c-muted); }
  .ai-tier-models { font: 500 0.6875rem/1.35 var(--font-mono); color: var(--c-muted); overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
  .ai-tier-signal { display: inline-flex; align-items: flex-end; gap: 2px; height: 12px; }
  .ai-tier-signal i { width: 3px; border-radius: 1px; background: var(--c-border-strong); }
  .ai-tier-signal i:nth-child(1) { height: 5px; } .ai-tier-signal i:nth-child(2) { height: 8px; } .ai-tier-signal i:nth-child(3) { height: 12px; }
  .ai-tier-economy .ai-tier-signal i:nth-child(1), .ai-tier-standard .ai-tier-signal i:nth-child(-n+2), .ai-tier-premium .ai-tier-signal i { background: var(--pa); }
  .ai-console .ai-tiers-legend { color: #fff; }
  .ai-tiers.is-compact .ai-tier-body { padding: 8px 10px; }

  /* ---------- Tool strip ---------- */
  .ai-toolstrip { display: flex; flex-wrap: wrap; gap: 6px; }
  .ai-toolstrip a { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 6px 12px; border: 1px solid var(--c-border); border-radius: var(--r-sm); background: var(--c-surface); color: var(--c-text); font-size: var(--t-small); font-weight: 600; text-decoration: none; transition: border-color var(--d-fast), background-color var(--d-fast), transform var(--d-fast) var(--ease-out); }
  .ai-toolstrip a:hover { border-color: var(--c-link); transform: translateY(-1px); }
  .ai-toolstrip a[aria-current='page'] { border-color: var(--c-primary); background: var(--c-primary-soft); color: var(--c-link); }
  .ai-toolstrip .i { color: var(--c-link); }
  @media (max-width: 639px) { .ai-toolstrip { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; margin-inline: calc(-1 * var(--s-1)); padding: 2px var(--s-1) var(--s-1); } .ai-toolstrip a { flex: none; } }
  .ai-toolstrip-lock { display: inline-flex; color: var(--c-muted); }
  .app-content > .ai-toolstrip { margin-bottom: var(--s-5); }

  /* ---------- Conversations & results ---------- */
  .ai-threads { list-style: none; margin: 0; padding: 0; display: grid; }
  .ai-threads li + li { border-top: 1px solid var(--c-border); }
  .ai-threads a { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--s-3); align-items: center; padding: 10px 8px; margin: 0 -8px; border-radius: var(--r-sm); color: var(--c-text); text-decoration: none; }
  .ai-threads a:hover { background: var(--c-surface2); }
  .ai-thread-icon { display: grid; place-items: center; width: 30px; height: 30px; border-radius: var(--r-sm); background: var(--c-primary-soft); color: var(--c-link); }
  .ai-thread-main { display: grid; gap: 2px; min-width: 0; }
  .ai-thread-title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .ai-thread-meta, .ai-thread-when { font-size: var(--t-caption); color: var(--c-muted); }
  .ai-thread-when { white-space: nowrap; }
  .ai-results { display: grid; gap: var(--s-3); grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); }
  .ai-result { display: grid; gap: var(--s-2); align-content: start; padding: var(--s-4); border: 1px solid var(--c-border); border-radius: var(--r-md); background: var(--c-surface); color: var(--c-text); text-decoration: none; transition: border-color var(--d-fast), box-shadow var(--d-fast); min-width: 0; }
  .ai-result:hover { border-color: var(--c-link); box-shadow: var(--e-2); }
  .ai-result-head { display: flex; gap: 6px; align-items: center; font-weight: 650; font-size: var(--t-small); }
  .ai-result-head .i { color: var(--c-link); }
  .ai-result-when { margin-left: auto; font-weight: 500; font-size: var(--t-caption); color: var(--c-muted); }
  .ai-result-out { font-size: var(--t-small); color: var(--c-text); white-space: pre-line; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow-wrap: anywhere; }
  .ai-result-out.is-code, .ai-history-out.is-code { font: 500 0.75rem/1.5 var(--font-mono); white-space: pre-wrap; }
  .ai-result-meta { font: 500 var(--t-caption)/1.4 var(--font-mono); color: var(--c-muted); }

  /* ---------- Side cards ---------- */
  .ai-card .chart-fig + .rank { margin-top: var(--s-6); }
  .ai-usage-line { margin: 0 0 var(--s-4); font-size: var(--t-small); color: var(--c-muted); }
  .ai-usage-line strong { font: var(--fw-numeric) 1.75rem/1 var(--ff-numeric); color: var(--c-text); margin-right: 4px; }
  .ai-usage .usage + .usage { margin-top: var(--s-3); }
  .ai-roster { list-style: none; margin: 0 0 var(--s-3); padding: 0; display: grid; gap: 2px; }
  .ai-roster li { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 8px; align-items: center; padding: 5px 0; font-size: var(--t-small); }
  .ai-roster-dot { width: 8px; height: 8px; border-radius: 2px; background: var(--c-border-strong); }
  .ai-roster li.is-on .ai-roster-dot { background: var(--c-success); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-success) 20%, transparent); }
  .ai-roster li.is-locked { color: var(--c-muted); }
  .ai-roster li.is-off { color: var(--c-muted); }
  .ai-roster-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .ai-roster-meta { font: 500 var(--t-caption)/1 var(--font-mono); color: var(--c-muted); white-space: nowrap; }
  .ai-quick { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
  .ai-quick a { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 8px; align-items: center; min-height: 36px; padding: 6px 4px; border-radius: var(--r-sm); color: var(--c-text); text-decoration: none; font-size: var(--t-small); font-weight: 500; }
  .ai-quick-t { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .ai-quick a:hover { background: var(--c-surface2); }
  .ai-quick .i { color: var(--c-link); flex: none; }

  /* ---------- Conversation ---------- */
  .ai-thread { list-style: none; margin: 0 0 var(--s-5); padding: 0; display: grid; gap: var(--s-4); max-width: 820px; }
  .ai-msg { min-width: 0; }
  .ai-msg-who { max-width: none; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0 0 var(--s-2); font-size: var(--t-small); font-weight: 650; }
  .ai-msg-tokens { font: 500 var(--t-caption)/1 var(--font-mono); color: var(--c-muted); margin-left: auto; }
  .ai-ask { justify-self: end; max-width: min(640px, 100%); padding: var(--s-4); border-radius: var(--r-lg) var(--r-lg) var(--r-xs) var(--r-lg); background: var(--c-primary-soft); border: 1px solid color-mix(in srgb, var(--c-primary) 22%, transparent); }
  .ai-ask .ai-msg-who { color: var(--c-link); }
  .ai-reply { padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); position: relative; }
  .ai-reply::before { content: ''; position: absolute; left: -1px; top: 18px; bottom: 18px; width: 2px; border-radius: 2px; background: linear-gradient(var(--pa), var(--p)); }
  .ai-reply .prose > :first-child { margin-top: 0; }
  .ai-reply .prose pre { overflow-x: auto; }
  .ai-composer { position: sticky; bottom: var(--s-3); z-index: 2; display: grid; gap: var(--s-3); max-width: 820px; padding: var(--s-4); border: 1px solid var(--c-border-strong); border-radius: var(--r-lg); background: color-mix(in srgb, var(--c-elevated) 94%, transparent); backdrop-filter: blur(12px); box-shadow: var(--e-3); }
  .ai-composer p { margin: 0; }
  @media (max-width: 1023px) { .ai-composer { position: static; } }
  .ai-context { display: grid; gap: var(--s-3); }
  .ai-context .overline { margin: 0; }
  .ai-context-h { font: 600 var(--t-small)/1.3 var(--font-sans); margin: var(--s-2) 0 0; }
  .ai-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 0; border: 1px solid var(--c-border); border-radius: var(--r-md); overflow: hidden; background: var(--c-border); }
  .ai-facts div { padding: 10px 12px; background: var(--c-surface); }
  .ai-facts dt { font-size: var(--t-caption); color: var(--c-muted); }
  .ai-facts dd { margin: 2px 0 0; font: var(--fw-numeric) 1.25rem/1.1 var(--ff-numeric); }
  .ai-danger summary { cursor: pointer; color: var(--c-muted); }
  .ai-danger form { display: grid; gap: var(--s-2); margin-top: var(--s-2); }

  /* ---------- Tools ---------- */
  .ai-tool { display: grid; gap: var(--s-5); grid-template-columns: minmax(0, 1fr); align-items: start; }
  @media (min-width: 1100px) { .ai-tool { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
  .ai-tool-in { display: grid; gap: var(--s-4); padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); min-width: 0; }
  .ai-tool-in textarea { font-size: 0.9375rem; }
  .ai-tool-opts { display: grid; gap: var(--s-3); grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }
  .ai-tool-opts:empty { display: none; }
  .ai-tool-out { min-width: 0; }
  .ai-result-empty { display: grid; justify-items: start; gap: var(--s-2); padding: var(--s-6); border: 1px dashed var(--c-border-strong); border-radius: var(--r-lg); background: var(--c-surface2); min-height: 260px; align-content: center; }
  .ai-result-empty h2 { margin: var(--s-2) 0 0; font: 600 var(--t-h4)/1.3 var(--font-sans); }
  .ai-result-empty p { margin: 0; max-width: 46ch; }
  .ai-result-panel { padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); box-shadow: 0 0 0 3px color-mix(in srgb, var(--pa) 18%, transparent); min-width: 0; animation: ai-in var(--d-slow) var(--ease-out); }
  .ai-result-panel pre { overflow-x: auto; }
  .ai-tool-out > .alert { margin: 0; }
  @keyframes ai-in { from { opacity: 0; transform: translateY(6px); } }
  .ai-history { margin-top: var(--s-5); }
  .ai-history-list { list-style: none; margin: 0; padding: 0; display: grid; }
  .ai-history-list li { display: grid; gap: 4px; padding: var(--s-3) 0; border-top: 1px solid var(--c-border); }
  .ai-history-list li:first-child { border-top: 0; padding-top: 0; }
  .ai-history-list p { margin: 0; }
  .ai-history-in { font-size: var(--t-small); color: var(--c-muted); overflow-wrap: anywhere; }
  .ai-history-out { font-size: var(--t-small); white-space: pre-line; overflow-wrap: anywhere; }

  /* ---------- Compare ---------- */
  .ai-compare-form { display: grid; gap: var(--s-4); padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); margin-bottom: var(--s-5); }
  .ai-vs { display: grid; gap: var(--s-3); grid-template-columns: minmax(0, 1fr); align-items: end; }
  .ai-vs-mark { display: none; }
  @media (min-width: 720px) { .ai-vs { grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); } .ai-vs-mark { display: grid; place-items: center; width: 36px; height: 40px; font: 600 var(--t-caption)/1 var(--font-mono); text-transform: uppercase; color: var(--c-muted); } }
  .ai-compare-grid { display: grid; gap: var(--s-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
  .ai-compare-col { padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); min-width: 0; }
  .ai-compare-col h2 { font: 600 var(--t-h4)/1.3 var(--font-sans); margin: 2px 0 var(--s-1); }
  .ai-compare-col .overline { margin: 0; color: var(--c-link); }
  .ai-compare-grid.is-empty .ai-compare-col { border-style: dashed; background: var(--c-surface2); min-height: 140px; }

  /* ---------- Prompt library ---------- */
  .ai-prompts { display: grid; gap: var(--s-4); grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
  .ai-prompt { display: grid; grid-template-rows: auto 1fr auto; gap: var(--s-3); padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); min-width: 0; transition: border-color var(--d-fast), box-shadow var(--d-fast); }
  .ai-prompt:hover { border-color: var(--c-border-strong); box-shadow: var(--e-2); }
  .ai-prompt-head { display: flex; gap: var(--s-2); align-items: flex-start; justify-content: space-between; }
  .ai-prompt-head h2 { margin: 0; font: 600 var(--t-h4)/1.35 var(--font-sans); }
  .ai-prompt-body { margin: 0; padding: var(--s-3); border-radius: var(--r-sm); background: var(--c-surface2); font: 400 0.8125rem/1.55 var(--font-mono); color: var(--c-muted); white-space: pre-line; overflow-wrap: anywhere; max-height: 9.5em; overflow: hidden; mask-image: linear-gradient(#000 70%, transparent); }
  .ai-prompt-foot { display: flex; gap: var(--s-2); align-items: center; justify-content: space-between; flex-wrap: wrap; }
  .ai-prompt-foot form { margin: 0; }
  .ai-save h2 { font: 600 var(--t-h4)/1.3 var(--font-sans); margin: 0 0 var(--s-4); }

  @media (prefers-reduced-motion: reduce) { .ai-orbit b, .ai-result-panel { animation: none; } }

  /* =========================== Landing page (ail-*) =========================== */
  .ail-hero { position: relative; overflow: hidden; isolation: isolate; padding: clamp(48px, 7vw, 104px) 0 clamp(48px, 6vw, 88px);
    --c-bg: #0C0C0C; --c-surface: #171717; --c-surface2: #090909; --c-elevated: #1E1E1E; --c-border: #2F2F2F; --c-border-strong: #434343;
    --c-text: #EEEEEE; --c-muted: #B2B2B2; --c-subtle: #7F7F7F; --c-link: #E6E6E6; --c-focus: #FFFFFF; --c-focus-inner: #000000; --c-primary: #FFFFFF; --c-primary-hover: #D6D6D6; --c-primary-soft: #282828; --c-on-primary: #000000; --c-accent: #FFFFFF; --p: #FFFFFF; --pa: #FFFFFF; --pon: #000000;
    --c-success: #C4C4C4; --c-success-soft: #222222; --c-warning: #C8C8C8; --c-warning-soft: #222222; --c-error: #9B9B9B; --c-error-soft: #1B1B1B;
    background: var(--c-bg); color: var(--c-text); color-scheme: dark; }
  .ail-hero::before { content: ''; position: absolute; inset: 0; z-index: -2; background: radial-gradient(55% 60% at 80% 18%, rgb(96 96 96 / 0.55), transparent 70%), radial-gradient(40% 40% at 10% 85%, rgb(193 193 193 / 0.14), transparent 70%); }
  .ail-hero::after { content: ''; position: absolute; inset: 0; z-index: -1; opacity: 0.22; background-image: linear-gradient(rgb(255 255 255 / 0.06) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / 0.06) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(70% 60% at 60% 30%, #000, transparent); }
  .ail-hero .btn-secondary { --b-bg: transparent; --b-fg: #fff; --b-bd: rgb(255 255 255 / 0.35); --b-hover: rgb(255 255 255 / 0.08); }
  .ail-hero .btn:not(.btn-secondary):not(.ai-send) { --b-bg: #fff; --b-fg: #1A1A1A; --b-hover: #E7E7E7; }
  .ail-hero-grid { display: grid; gap: clamp(var(--s-8), 5vw, var(--s-16)); grid-template-columns: minmax(0, 1fr); align-items: center; }
  @media (min-width: 1024px) { .ail-hero-grid { grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); } }
  .ail-hero-copy { display: grid; gap: var(--s-5); }
  .ail-hero-copy .lede { margin: 0; color: var(--c-muted); }
  .ail-id { display: flex; gap: var(--s-3); align-items: center; margin: 0; }
  .ail-name { font: 650 1.25rem/1 var(--font-display); letter-spacing: 0.02em; }
  .ail-name span { color: var(--pa); }
  .ail-hero h1 { margin: 0; color: #fff; font-size: clamp(2.5rem, 1.3rem + 4.6vw, 5.25rem); }
  .ail-grad { background: linear-gradient(100deg, #fff 10%, #B8B8B8 45%, var(--pa) 90%); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .ail-facts { list-style: none; margin: var(--s-2) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); color: var(--c-muted); font-size: var(--t-small); }
  .ail-facts li { display: inline-flex; gap: 6px; align-items: center; margin: 0; }
  .ail-facts .i { color: var(--pa); }

  .ail-constellation { position: relative; width: min(100%, 420px); justify-self: center; }
  .ail-orbits { width: 100%; height: auto; display: block; overflow: visible; }
  .ail-ring { fill: none; stroke: rgb(255 255 255 / 0.14); stroke-width: 1; }
  .ail-ring.is-dashed { stroke-dasharray: 3 6; }
  .ail-ray { stroke: rgb(193 193 193 / 0.35); stroke-width: 1; }
  .ail-node.t1 { fill: #C1C1C1; } .ail-node.t2 { fill: #949494; } .ail-node.t3 { fill: #fff; }
  .ail-node { filter: drop-shadow(0 0 6px rgb(193 193 193 / 0.6)); }
  .ail-tool-node { fill: none; stroke: #E6E6E6; stroke-width: 1.5; }
  .ail-core { fill: url(#none); fill: #606060; stroke: #E6E6E6; stroke-width: 2; }
  .ail-core-glow { fill: rgb(96 96 96 / 0.35); animation: ail-pulse 3.2s var(--ease-in-out) infinite; transform-box: fill-box; transform-origin: center; }
  .ail-spin { transform-origin: 200px 200px; animation: ail-spin 40s linear infinite; }
  .ail-spin-2 { animation-duration: 64s; animation-direction: reverse; }
  .ail-spin-3 { animation-duration: 90s; }
  @keyframes ail-spin { to { transform: rotate(360deg); } }
  @keyframes ail-pulse { 50% { transform: scale(1.25); opacity: 0.55; } }
  .ail-legend { list-style: none; margin: var(--s-3) 0 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: var(--s-2) var(--s-4); font: 500 var(--t-caption)/1 var(--font-mono); color: var(--c-muted); }
  .ail-legend li { display: inline-flex; gap: 6px; align-items: center; margin: 0; }
  .ail-legend i { width: 8px; height: 8px; border-radius: 50%; }
  .ail-legend i.t1 { background: #C1C1C1; } .ail-legend i.t2 { background: #949494; } .ail-legend i.t3 { background: #fff; } .ail-legend i.tool { border-radius: 2px; border: 1.5px solid #E6E6E6; }

  .ail-hero-preview { margin-top: clamp(var(--s-10), 6vw, var(--s-16)); }
  .ail-hero .preview { background: rgb(12 12 12 / 0.7); border-color: rgb(255 255 255 / 0.14); box-shadow: 0 30px 80px -20px rgb(0 0 0 / 0.6), 0 0 0 1px rgb(230 230 230 / 0.06); backdrop-filter: blur(10px); }
  .preview .tabs[role='tablist'] { margin-bottom: var(--s-4); }
  .ail-pv-grid { display: grid; gap: var(--s-4); grid-template-columns: minmax(0, 1fr); }
  @media (min-width: 900px) { .ail-pv-grid { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); } .ail-pv-grid.is-even { grid-template-columns: 1fr 1fr; } }
  .ail-pv-console { padding: var(--s-5); gap: var(--s-4); border-radius: var(--r-lg); }
  .ail-pv-h { margin: 0; font: 640 1.0625rem/1.25 var(--font-display); letter-spacing: -0.01em; color: var(--c-text); }
  .ai-console .ail-pv-h { color: #fff; font-size: 1.25rem; }
  .ail-pv-label { margin: 0; font-weight: 600; font-size: var(--t-small); }
  .ail-fake-input { min-height: 88px; padding: 12px 14px; border: 1px solid rgb(255 255 255 / 0.18); border-radius: var(--r-sm); background: rgb(5 5 5 / 0.5); color: #fff; font-size: 0.9375rem; }
  .ail-caret { display: inline-block; width: 2px; height: 1.1em; margin-left: 2px; vertical-align: text-bottom; background: var(--pa); animation: ail-blink 1.1s steps(2) infinite; }
  @keyframes ail-blink { 50% { opacity: 0; } }
  .ail-static { pointer-events: none; }
  .ail-pv-side { display: grid; gap: var(--s-3); align-content: start; min-width: 0; }
  .ail-pv-side .overline { margin: var(--s-2) 0 0; }
  .ail-thread { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--s-3); align-items: center; padding: 8px 0; }
  .ail-doc { margin: 0; padding: 10px 12px; border: 1px solid var(--c-border); border-radius: var(--r-sm); background: var(--c-surface2); font: 400 0.8125rem/1.6 var(--font-mono); }
  .ail-pre { margin: 0; font-size: 0.8125rem; overflow-x: auto; }
  .ail-pv-tool { margin-top: var(--s-4); }

  .ail-flow { list-style: none; margin: var(--s-8) 0 0; padding: 0; display: grid; gap: var(--s-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); counter-reset: f; position: relative; }
  .ail-flow li { position: relative; display: grid; gap: var(--s-2); align-content: start; margin: 0; padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface); }
  .ail-flow li::after { content: ''; position: absolute; top: 40px; right: calc(-1 * var(--s-4)); width: var(--s-4); height: 2px; background: linear-gradient(90deg, var(--c-primary), var(--pa)); background-size: 200% 100%; animation: ail-flowline 2.4s linear infinite; }
  .ail-flow li:last-child::after { display: none; }
  @media (max-width: 1100px) { .ail-flow li::after { display: none; } }
  @keyframes ail-flowline { to { background-position: -200% 0; } }
  .ail-flow-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: var(--r-md); background: var(--c-primary-soft); color: var(--c-link); }
  .ail-flow-n { position: absolute; top: var(--s-5); right: var(--s-5); font: 600 var(--t-caption)/1 var(--font-mono); color: var(--c-muted); }
  .ail-flow h3 { margin: var(--s-2) 0 0; font: 600 var(--t-h4)/1.3 var(--font-sans); }
  .ail-flow p { margin: 0; color: var(--c-muted); font-size: var(--t-small); }

  .ail-tools { list-style: none; margin: var(--s-8) 0 0; padding: 0; display: grid; gap: var(--s-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }
  .ail-toolcard { display: grid; gap: var(--s-2); align-content: start; margin: 0; padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-bg); transition: transform var(--d-base) var(--ease-out), box-shadow var(--d-base); }
  .ail-toolcard:hover { transform: translateY(-3px); box-shadow: var(--e-2); }
  .ail-toolcard-head { display: flex; gap: 8px; align-items: center; margin: 0 0 var(--s-2); font-weight: 650; }
  .ail-toolcard-head .i { color: var(--c-link); }
  .ail-io-in, .ail-io-out { margin: 0; padding: 10px 12px; border-radius: var(--r-sm); font-size: var(--t-small); white-space: pre-line; overflow-wrap: anywhere; }
  .ail-io-in { background: var(--c-surface2); color: var(--c-muted); }
  .ail-io-out { position: relative; background: var(--c-primary-soft); color: var(--c-text); }
  .ail-io-in + .ail-io-out::before { content: '↓'; position: absolute; top: -16px; left: 14px; font-size: 12px; color: var(--c-link); }
  .ail-io-out.is-code { font: 500 0.75rem/1.5 var(--font-mono); }
  .ail-note { display: flex; gap: 6px; align-items: center; margin: var(--s-4) 0 0; color: var(--c-muted); }

  .ail-duo { display: grid; gap: clamp(var(--s-8), 5vw, var(--s-16)); grid-template-columns: minmax(0, 1fr); align-items: center; }
  @media (min-width: 1024px) { .ail-duo { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); } .ail-duo.is-reverse .ail-duo-copy { order: 2; } }
  .ail-duo-copy { display: grid; gap: var(--s-5); }
  .ail-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-3); }
  .ail-list li { display: flex; gap: var(--s-3); align-items: center; margin: 0; }
  .ail-list .i { color: var(--c-link); flex: none; }

  .ail-api .h-section { color: #fff; }
  .ail-code { display: grid; gap: var(--s-4); grid-template-columns: minmax(0, 1fr); margin-top: var(--s-8); }
  @media (min-width: 1024px) { .ail-code { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); } }
  .ail-code pre { margin: 0; padding: var(--s-5); border: 1px solid var(--c-border); border-radius: var(--r-lg); background: var(--c-surface2); color: var(--c-text); font-size: 0.8125rem; line-height: 1.7; overflow-x: auto; }
  .ail-code-out { border-color: rgb(193 193 193 / 0.3) !important; }

  .ail-trust { list-style: none; margin: var(--s-8) 0 0; padding: 0; display: grid; gap: var(--s-6) var(--s-8); grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); }
  .ail-trust li { display: grid; gap: var(--s-2); align-content: start; margin: 0; padding-top: var(--s-4); border-top: 2px solid var(--c-border); }
  .ail-trust .i { color: var(--c-link); }
  .ail-trust h3 { margin: 0; font: 600 var(--t-h4)/1.3 var(--font-sans); }
  .ail-trust p { margin: 0; color: var(--c-muted); font-size: var(--t-small); }

  @media (prefers-reduced-motion: reduce) { .ail-spin, .ail-core-glow, .ail-caret, .ail-flow li::after { animation: none; } }
}