/* Vardonne: the site's own layout over the platform base. Colour comes from
 * design.css (the platform tokens and the brand overlay); nothing here names a
 * colour of its own. Motion uses the platform's tokens.
 *
 * The composition, from the 21 September 2026 appraisal (Practice/01-Brand/
 * DESIGN-DIRECTION-2026-09-21.md): dark as the opening statement, light for
 * reading. One ink band carries the masthead and the page's opening line at
 * display scale with a single gold rule; everything read is on bone. */
body { background: var(--vardonne-bone); font-size: var(--font-size-base); line-height: var(--font-leading-normal); }

/* The masthead: sticky, ink at 86% over a blur, so it dissolves into the band
 * and reads over the bone as the page scrolls. */
.site-header { position: sticky; top: 0; z-index: 10; background: var(--vardonne-veil); color: var(--vardonne-on-ink); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); }
.site-header .container { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--space-3) var(--space-6); padding-block: var(--space-4); }
.wordmark { font-family: var(--font-family-display); font-size: var(--font-size-xl); font-weight: var(--font-weight-medium); letter-spacing: var(--font-tracking-tight); color: inherit; text-decoration: none; }
.site-nav ul { display: flex; flex-wrap: wrap; gap: var(--space-5); margin: 0; padding: 0; list-style: none; }
.site-nav a { color: var(--vardonne-on-ink-muted); text-decoration: none; font-size: var(--font-size-sm); letter-spacing: var(--font-tracking-wide); padding-block: var(--space-2); display: inline-block; min-height: var(--layout-touch-target); }
.site-nav a[aria-current="page"] { color: var(--vardonne-on-ink); text-decoration: underline; text-underline-offset: 0.45em; text-decoration-color: var(--vardonne-gold); text-decoration-thickness: 2px; }
@media (hover: hover) {
  .site-nav a:hover { color: var(--vardonne-on-ink); }
}

/* The ink band: the opening, then a tonal fade into the reading surface. The
 * masthead sits above it and is the same ink, so the two read as one. */
.band { background: var(--vardonne-ink); color: var(--vardonne-on-ink); margin-top: calc(-1 * var(--layout-touch-target) - var(--space-8)); padding-top: calc(var(--layout-touch-target) + var(--space-8)); display: flex; flex-direction: column; }
.band a { color: inherit; }
.band .opening { display: block; position: relative; padding-block: var(--space-8) var(--space-9); flex: 1; }
.band--full { min-height: 100svh; }
.band--full .opening { display: flex; flex-direction: column; justify-content: center; }
.band .fade { height: calc(var(--space-9) * 2); background: linear-gradient(to bottom, var(--vardonne-ink) 0%, color-mix(in oklab, var(--vardonne-ink) 78%, var(--vardonne-bone)) 30%, color-mix(in oklab, var(--vardonne-ink) 35%, var(--vardonne-bone)) 62%, var(--vardonne-bone) 100%); margin-bottom: calc(-2 * var(--space-9)); position: relative; z-index: 1; }
.opening .rule { margin: 0 0 var(--space-6); }
.opening .lede, .opening h1 { font-family: var(--font-family-display); font-weight: var(--font-weight-regular); font-size: clamp(var(--font-size-3xl), 6vw, var(--font-size-5xl)); line-height: var(--font-leading-tight); letter-spacing: var(--font-tracking-tight); max-width: 16ch; text-wrap: balance; margin: 0 0 var(--space-6); color: inherit; }
.opening .strap { font-size: var(--font-size-md); line-height: var(--font-leading-normal); color: var(--vardonne-on-ink-muted); max-width: 52ch; margin: 0; }
.opening .strap + .actions { margin-top: var(--space-7); }
.opening .device { position: absolute; right: var(--space-4); bottom: var(--space-6); width: min(38vw, 34rem); height: auto; color: var(--vardonne-on-ink); pointer-events: none; }
@media (max-width: 64rem) {
  .opening .device { display: none; }
}
.band .button { color: var(--vardonne-ink); background: var(--vardonne-on-ink); border-color: var(--vardonne-on-ink); text-decoration: none; }
@media (hover: hover) {
  .band .button:hover { color: var(--vardonne-ink); background: var(--vardonne-gold); border-color: var(--vardonne-gold); transform: translateY(-1px); }
  @media (prefers-reduced-motion: reduce) {
    .band .button:hover { transform: none; }
  }
}
.band .button:active { color: var(--vardonne-ink); background: var(--vardonne-gold); transform: translateY(1px); }
@media (prefers-reduced-motion: reduce) {
  .band .button:active { transform: none; }
}
.rule { border: 0; border-top: 2px solid var(--vardonne-gold); width: var(--space-9); margin: var(--space-7) 0 var(--space-5); }

/* Reading surfaces. */
main { padding-block: var(--space-9); position: relative; padding-top: calc(var(--space-9) * 2.5); }
main > .container + .container { padding-top: var(--space-9); }
h1, h2, h3 { font-family: var(--font-family-display); font-weight: var(--font-weight-regular); letter-spacing: var(--font-tracking-tight); }
h2 { font-size: var(--font-size-2xl); margin: 0 0 var(--space-5); }
h3 { font-size: var(--font-size-xl); }
.section-label { font-family: var(--font-family-sans); font-size: var(--font-size-sm); letter-spacing: var(--font-tracking-wide); text-transform: uppercase; color: var(--text-muted); margin: 0 0 var(--space-4); }
.doors { display: grid; gap: var(--space-7) var(--space-8); grid-template-columns: repeat(auto-fit, minmax(24rem, 1fr)); margin: 0; padding: 0; list-style: none; }
.doors li { border-top: 1px solid var(--border-strong); padding-top: var(--space-5); }
.doors h3 { margin: 0 0 var(--space-3); }
.doors p { font-size: var(--font-size-base); color: var(--text); max-width: 48ch; }
.doors a { display: inline-block; min-height: var(--layout-touch-target); font-weight: var(--font-weight-medium); }
.statement { font-family: var(--font-family-display); font-size: clamp(var(--font-size-xl), 3.4vw, var(--font-size-3xl)); line-height: var(--font-leading-tight); letter-spacing: var(--font-tracking-tight); text-wrap: balance; max-width: 26ch; margin: 0; }
.statement em { font-style: italic; color: var(--vardonne-gold); }
.split { display: grid; gap: var(--space-7) var(--space-8); grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); align-items: start; }
.split p { max-width: 48ch; }
.prose { max-width: var(--layout-measure); }
.container.prose { max-width: var(--layout-container); }
.container.prose > * { max-width: var(--layout-measure); }
.prose h2 { margin-top: var(--space-8); }
.prose h2:first-child { margin-top: 0; }
.prose dl div { border-top: 1px solid var(--border-strong); padding: var(--space-5) 0; display: grid; grid-template-columns: minmax(10rem, 1fr) 3fr; gap: var(--space-4); }
.prose dt { font-weight: var(--font-weight-medium); }
.prose dd { margin: 0; }
.shapes { font-size: var(--font-size-base); color: var(--text-muted); }
.form { max-width: var(--layout-container-sm); }
.form .field { margin-bottom: var(--space-5); }
.form textarea { min-height: 12rem; }
.form input, .form textarea { width: 100%; font-size: var(--font-size-base); }
.notice { border-left: 3px solid var(--vardonne-gold); padding: var(--space-3) var(--space-4); background: var(--surface-sunken); max-width: var(--layout-measure); }

/* Footer. */
.site-footer { border-top: 2px solid var(--vardonne-gold); padding-block: var(--space-8); font-size: var(--font-size-sm); color: var(--text-muted); }
.site-footer .container { display: grid; gap: var(--space-6) var(--space-8); grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.site-footer .wordmark { font-size: var(--font-size-lg); color: var(--text); display: inline-block; margin-bottom: var(--space-3); }
.site-footer p { margin: 0 0 var(--space-2); max-width: 44ch; }
.site-footer .status { grid-column: 1 / -1; max-width: var(--layout-measure); margin-top: var(--space-4); }
.site-footer a { color: var(--text-muted); }
.site-footer ul { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--space-2); }
.site-footer li a { display: inline-block; min-height: var(--layout-touch-target); line-height: var(--layout-touch-target); }
@media (hover: hover) {
  .site-footer a:hover { color: var(--text); }
}
@media (max-width: 40rem) {
  .prose dl div { grid-template-columns: 1fr; gap: var(--space-1); }
}

/* Back to top: a quiet fixed control that appears after the first screen. The
 * site carries no script, so the reveal is a scroll timeline; a browser
 * without one keeps the control hidden and uses the footer link instead. */
.to-top { position: fixed; right: var(--space-5); bottom: var(--space-5); width: var(--layout-touch-target); height: var(--layout-touch-target); display: none; align-items: center; justify-content: center; border-radius: 50%; background: var(--vardonne-veil); color: var(--vardonne-on-ink); text-decoration: none; font-family: var(--font-family-sans); font-size: var(--font-size-md); z-index: 9; }
@supports (animation-timeline: scroll()) {
  .to-top { display: flex; opacity: 0; animation: to-top-reveal linear both; animation-timeline: scroll(root); animation-range: 60vh 100vh; }
  @keyframes to-top-reveal { from { opacity: 0; visibility: hidden; } to { opacity: 1; visibility: visible; } }
}
@media (hover: hover) {
  .to-top:hover { color: var(--vardonne-ink); background: var(--vardonne-gold); }
}