/* =============================================================================
   AI Architect — contact.css (contact.html only)
   Authored entirely against the vendored design-system aliases in
   /ds/tokens/surfaces.css + /ds/tokens/colors.css. No raw hex except values
   already present in /ds/assets/logo/ (none used here). Survives
   data-surface="paper" (default) and data-surface="ink" unchanged, per the
   design gate (G1-G6). Mirrors the chrome patterns established in
   pipeline.css (nav, footer, hero, sections, buttons).
   ============================================================================= */

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--canvas);color:var(--text);font:var(--role-body);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.container{max-width:1280px;margin:0 auto;padding:0 28px}

.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{position:fixed;left:8px;top:8px;width:auto;height:auto;background:var(--canvas);color:var(--text);padding:8px 12px;border:1px solid var(--accent);z-index:1000;border-radius:var(--radius-sm)}

/* ── NAV ─────────────────────────────────────────────────────────────────── */
nav.topnav{position:sticky;top:0;z-index:50;background:color-mix(in oklab, var(--canvas) 92%, transparent);border-bottom:1px solid var(--border)}
nav.topnav .inner{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;max-width:1280px;margin:0 auto;gap:24px}
.logo{display:flex;align-items:center;gap:12px;font-weight:var(--weight-semibold);font-size:var(--text-sm);letter-spacing:-0.01em;color:var(--text)}
.logo-mark{width:28px;height:28px;border:1px solid var(--accent);background:var(--accent-soft);display:grid;place-items:center;border-radius:var(--radius-sm);position:relative;transition:transform .35s ease,background .25s ease;flex:none}
.logo:hover .logo-mark{transform:rotate(45deg);background:var(--accent)}
.logo-mark::before{content:"";position:absolute;inset:5px;border:1px solid var(--accent);border-radius:1px;transform:rotate(45deg)}
.logo-mark::after{content:"";position:absolute;width:5px;height:5px;background:var(--accent);border-radius:50%}
.navlinks{display:flex;gap:24px;align-items:center;font-size:var(--text-sm);color:var(--text-secondary);flex-wrap:wrap}
.navlinks a:not(.nav-cta){position:relative;padding:4px 0;transition:color var(--dur-fast) var(--ease)}
.navlinks a:not(.nav-cta)::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.navlinks a:not(.nav-cta):hover{color:var(--text)}
.navlinks a:not(.nav-cta):hover::after{transform:scaleX(1)}
.navlinks a[aria-current="page"]{color:var(--accent-ink)}
.nav-cta{background:var(--accent);color:var(--on-accent);padding:9px 18px;border-radius:var(--radius-sm);font-size:var(--text-sm);font-weight:var(--weight-semibold);letter-spacing:0.01em;transition:background var(--dur-fast) var(--ease),transform var(--dur-fast) var(--ease)}
.nav-cta:hover{background:var(--accent-bright);color:var(--on-accent);transform:translateY(-1px)}
.nav-cta[aria-current="page"]{background:var(--accent-bright)}
@media (max-width:980px){.navlinks a:not(.nav-cta){display:none}.navlinks a.nav-cta{display:inline-flex}}

/* ── HERO ────────────────────────────────────────────────────────────────── */
.hero{padding:72px 0 48px}
.hero h1{font-family:var(--font-serif);font-weight:var(--weight-regular);font-size:clamp(34px,4.6vw,54px);line-height:1.06;letter-spacing:-0.02em;margin:20px 0 16px;color:var(--text)}
.hero h1 em{font-style:italic;color:var(--accent-ink)}
.hero .lede{font-size:var(--text-lg);line-height:1.6;color:var(--text-secondary);max-width:640px;margin:0}

/* ── SECTIONS ────────────────────────────────────────────────────────────── */
.section{padding:0 0 80px}

/* ── CONTACT LAYOUT ──────────────────────────────────────────────────────── */
.contact-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:32px;align-items:start}
@media (max-width:860px){.contact-grid{grid-template-columns:1fr}}

.contact-card{background:var(--surface-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}
@media (max-width:480px){.contact-card{padding:22px}}

/* ── HONEYPOT — visually and audibly absent, but present in the DOM tree
   for naive bots that fill every field they find. Off-screen positioning
   (not display:none/visibility:hidden) so scripted DOM-fillers that skip
   invisible fields still encounter it; aria-hidden + tabindex="-1" keep it
   out of the accessibility tree and the tab order for real users. ───────── */
.hp-field{position:absolute;left:-9999px;top:-9999px;width:1px;height:1px;overflow:hidden}

/* ── FIELDS ──────────────────────────────────────────────────────────────── */
.field-row{margin-bottom:20px}
.field-row:last-of-type{margin-bottom:0}
.field-label{display:block;font-family:var(--font-sans);font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text);margin-bottom:7px}
.contact-card .aia-field{width:100%;font-family:var(--font-sans);font-size:var(--text-md);padding:10px 13px}
.contact-card textarea.aia-field{resize:vertical;min-height:120px;line-height:1.6}
.contact-card select.aia-field{appearance:none}
.field-hint{font-size:var(--text-xs);color:var(--text-muted);margin:6px 0 0}
.field-err{font-size:var(--text-xs);color:var(--danger-ink);margin:6px 0 0;font-weight:var(--weight-medium)}
.aia-field[aria-invalid="true"]{border-color:var(--danger-ink)}

/* ── STATUS (aria-live) ─────────────────────────────────────────────────── */
.form-status{min-height:1px;margin:18px 0;font-size:var(--text-sm);line-height:1.5;padding:0;border-radius:var(--radius-sm);transition:padding var(--dur-fast) var(--ease)}
.form-status:empty{margin:0}
.form-status--success{padding:12px 14px;background:color-mix(in oklab, var(--ok-ink) 12%, transparent);border:1px solid color-mix(in oklab, var(--ok-ink) 45%, transparent);color:var(--ok-ink)}
.form-status--error{padding:12px 14px;background:color-mix(in oklab, var(--danger-ink) 12%, transparent);border:1px solid color-mix(in oklab, var(--danger-ink) 45%, transparent);color:var(--danger-ink)}

/* ── SUBMIT ──────────────────────────────────────────────────────────────── */
#contact-form .aia-btn{width:100%;margin-top:4px}
.form-fineprint{margin:14px 0 0;text-align:left}

/* ── ALTERNATE CONTACT COLUMN ────────────────────────────────────────────── */
.contact-alt{display:flex;flex-direction:column;gap:10px}
.alt-title{font-family:var(--font-sans);font-size:var(--text-sm);font-weight:var(--weight-semibold);color:var(--text);letter-spacing:-.01em;margin:0 0 6px}
.alt-link{display:flex;flex-direction:column;gap:2px;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);transition:border-color var(--dur-fast) var(--ease),background var(--dur-fast) var(--ease)}
.alt-link:hover{border-color:var(--border-strong);background:var(--surface-chip)}
.alt-link-label{font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text)}
.alt-link span:not(.alt-link-label){font-family:var(--font-mono);font-size:var(--text-xs);color:var(--text-muted)}

.fine-print{color:var(--text-muted);font-size:var(--text-xs);margin:16px 0 0}

/* ── FOOTER (mirrors home.css / pipeline.css) ───────────────────────────── */
footer{padding:56px 0 32px;background:var(--night-0);color:var(--fg-1)}
footer .inner{max-width:1280px;margin:0 auto;padding:0 28px}
footer .frow{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;padding-bottom:32px;margin-bottom:32px;border-bottom:1px solid var(--line)}
footer .flogo{display:flex;align-items:center;gap:10px;font-family:var(--font-sans);font-weight:var(--weight-semibold);font-size:var(--text-sm);color:var(--fg-0)}
footer .frow > div:last-child{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--fg-2)}
footer .frow a{color:var(--fg-1);transition:color var(--dur-fast) var(--ease)}
footer .frow a:hover{color:var(--accent-ink)}
footer .sitemap{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-bottom:32px}
@media (max-width:640px){footer .sitemap{grid-template-columns:1fr;gap:20px}}
footer .sitemap-col{display:flex;flex-direction:column;gap:9px}
footer .sitemap-col .h{font-family:var(--font-mono);font-size:var(--text-2xs);letter-spacing:var(--tracking-caps);text-transform:uppercase;color:var(--fg-3);margin-bottom:2px}
footer .sitemap-col a{font-size:var(--text-sm);color:var(--fg-1);transition:color var(--dur-fast) var(--ease)}
footer .sitemap-col a:hover{color:var(--accent-ink)}
footer .sitemap-col a[aria-current="page"]{color:var(--accent-ink)}
footer .copyright{font-family:var(--font-mono);font-size:var(--text-2xs);color:var(--fg-3);margin:0}