/* Mensara how-it-works section: shares tokens and site-* primitives with the
   marketing homepage (mensara_tokens.css, application.css), adds only the
   layout this section needs on top. */

/* Pages use the shared site/marketing header (_header.html.erb) for full-site
   nav consistency. The bordered segmented-control toggle style is canonical
   and lives in application.css's .surface-toggle rules — no page-specific
   override here; every surface (marketing home, how-it-works) renders and
   looks identical. */

.hiw-shell { width: min(100%, var(--site-content)); margin: 0 auto; padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 5vw, 4rem) clamp(5rem, 10vw, 8rem); }
.hiw-subpage-shell { display: flex; flex-direction: column; align-items: stretch; }
.hiw-subpage-shell[hidden] { display: none; }
.hiw-subpage-shell .hiw-shell { flex: 1 1 auto; min-width: 0; max-width: 65rem; }
@media (min-width: 1280px) { .hiw-subpage-shell { flex-direction: row; align-items: flex-start; } }

.hiw-rail { display: none; flex: 0 0 15.25rem; position: sticky; top: 4.5rem; align-self: flex-start; padding: clamp(1.5rem, 3vw, 3rem) 0 2.5rem 1.75rem; }
@media (min-width: 1280px) { .hiw-rail { display: block; } }
.hiw-rail__title { font-family: var(--site-font-mono); font-size: 0.625rem; letter-spacing: 0.2em; color: var(--site-dim); padding-left: 0.8rem; }
.hiw-rail__groups { margin-top: 1rem; display: flex; flex-direction: column; gap: 1.1rem; }
.hiw-rail__group-label { font-family: var(--site-font-mono); font-size: 0.625rem; letter-spacing: 0.18em; color: var(--site-dim); padding-left: 0.8rem; }
.hiw-rail__rows { margin-top: 0.4rem; display: flex; flex-direction: column; }
.hiw-rail__row { display: grid; grid-template-columns: 1.25rem minmax(0, 1fr); gap: 0.5rem; align-items: baseline; padding: 0.5rem 0 0.5rem 0.75rem; border-left: 1px solid color-mix(in srgb, var(--site-violet) 22%, transparent); text-decoration: none; transition: background-color var(--site-motion-fast); }
.hiw-rail__n { font-family: var(--site-font-mono); font-size: 0.66rem; color: var(--site-dim); }
.hiw-rail__t { font-size: 0.875rem; line-height: 1.35; color: var(--site-muted); transition: color var(--site-motion-fast); }
.hiw-rail__row:hover .hiw-rail__t { color: var(--site-gold); }
.hiw-rail__row--current { border-left-color: var(--site-ember); background: color-mix(in srgb, var(--site-ember) 7%, transparent); }
.hiw-rail__row--current .hiw-rail__t { color: var(--site-bone); }
.hiw-rail__back { display: inline-block; margin: 1.5rem 0 0 0.8rem; font-family: var(--site-font-mono); font-size: 0.66rem; letter-spacing: 0.14em; color: var(--site-muted); text-decoration: none; }
.hiw-rail__back:hover, .hiw-rail__back:focus-visible { color: var(--site-bone); }

.hiw-drawer-wrap { margin: 0 clamp(1.5rem, 5vw, 4rem); }
@media (min-width: 1280px) { .hiw-drawer-wrap { display: none; } }
.hiw-drawer-toggle { appearance: none; display: flex; align-items: center; gap: 0.6rem; min-height: 2.75rem; background: transparent; border: 1px solid var(--site-line); border-radius: 0.25rem; padding: 0 0.9rem; cursor: pointer; font-family: var(--site-font-mono); font-size: 0.7rem; letter-spacing: 0.16em; color: var(--site-bone); margin-top: 0.9rem; }
.hiw-drawer-toggle:hover, .hiw-drawer-toggle:focus-visible { border-color: var(--site-gold); }
.hiw-drawer-toggle svg { transition: transform var(--site-motion-fast); }
.hiw-drawer-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.hiw-nav-drawer { margin-top: 0.9rem; background: var(--site-band); border: 1px solid color-mix(in srgb, var(--site-violet) 20%, transparent); border-radius: 0.875rem; padding: 1.375rem 1.5rem; display: grid; grid-template-columns: repeat(auto-fit, minmax(11.9rem, 1fr)); gap: 1.375rem; }
.hiw-nav-drawer[hidden] { display: none; }
.hiw-nav-drawer .hiw-rail__group-label { padding-left: 0.75rem; }
.hiw-nav-drawer .hiw-rail__row { min-height: 2.75rem; align-content: center; padding: 0.375rem 0 0.375rem 0.7rem; }

.hiw-diagram-wrap { margin: clamp(2rem, 5vw, 3.5rem) 0 clamp(3rem, 7vw, 5rem); padding: clamp(1.5rem, 4vw, 2.5rem); border: 1px solid var(--site-line); border-radius: 0.5rem; background: var(--site-band); overflow-x: auto; }
.hiw-diagram { min-width: 40rem; }
.hiw-hero { padding-bottom: clamp(3rem, 7vw, 5rem); border-bottom: 1px solid var(--site-line); }
.hiw-hero__heading { max-width: 20ch; }
.hiw-hero__copy { max-width: 46rem; }

.hiw-groups { display: flex; flex-direction: column; }
.hiw-group-row { display: flex; gap: clamp(2rem, 5vw, 3.5rem); padding: clamp(2.5rem, 6vw, 4rem) 0; border-bottom: 1px solid var(--site-line); }
.hiw-group-meta { flex: 0 0 14rem; }
.hiw-group-meta__range { margin: 0 0 var(--site-space-2); color: var(--site-dim); font-family: var(--site-font-mono); font-size: 0.75rem; letter-spacing: 0.08em; }
.hiw-group-meta h2 { margin: 0 0 var(--site-space-2); color: var(--site-bone); font-family: var(--site-font-display); font-size: clamp(1.4rem, 2.6vw, 1.75rem); font-weight: 400; line-height: 1.15; }
.hiw-group-meta p { margin: 0; color: var(--site-muted); font-size: 0.95rem; line-height: 1.5; }
.hiw-group-cards { flex: 1 1 auto; min-width: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(14.5rem, 1fr)); background: var(--site-void); border-top: 1px solid var(--site-line); border-left: 1px solid var(--site-line); align-content: start; }
.hiw-page-card { display: flex; flex-direction: column; gap: 0.4rem; padding: var(--site-space-4); background: var(--site-void); color: var(--site-bone); text-decoration: none; border-right: 1px solid var(--site-line); border-bottom: 1px solid var(--site-line); transition: background-color var(--site-motion-fast), border-color var(--site-motion-fast); }
.hiw-page-card:hover, .hiw-page-card:focus-visible { background: var(--site-panel); border-color: color-mix(in srgb, var(--site-gold) 55%, transparent); }
.hiw-page-card__n { color: var(--site-dim); font-family: var(--site-font-mono); font-size: 0.75rem; }
.hiw-page-card__t { font-family: var(--site-font-display); font-size: 1.2rem; line-height: 1.2; }
.hiw-page-card__l { color: var(--site-muted); font-size: 0.85rem; line-height: 1.4; }
@media (max-width: 780px) { .hiw-group-row { flex-direction: column; gap: 1rem; } .hiw-group-meta { flex: none; } }

.hiw-close { padding-top: clamp(3rem, 7vw, 5rem); }
.hiw-close .site-heading { max-width: 18ch; margin-top: var(--site-space-3); }

.hiw-page__h1 { max-width: 20ch; }
.hiw-page__standfirst { max-width: 46rem; margin-bottom: clamp(3rem, 7vw, 5rem); }

.hiw-beats { display: grid; gap: clamp(2.5rem, 6vw, 4rem); }
.hiw-beat { padding-top: clamp(1.5rem, 4vw, 2.5rem); border-top: 1px solid var(--site-line); }
.hiw-beat:first-child { border-top: 0; padding-top: 0; }
.hiw-beat__n { margin: 0 0 var(--site-space-2); color: var(--site-dim); font-family: var(--site-font-mono); font-size: 0.75rem; letter-spacing: 0.1em; }
.hiw-beat__heading { max-width: 28ch; margin: 0 0 var(--site-space-3); color: var(--site-bone); font-family: var(--site-font-display); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 400; line-height: 1.05; }
.hiw-beat .site-copy + .site-copy { margin-top: var(--site-space-3); }

.hiw-receipt-pair { display: grid; gap: var(--site-space-3); grid-template-columns: repeat(2, minmax(0, 1fr)); margin: clamp(2rem, 5vw, 3rem) 0; }
.hiw-receipt-pair .receipt { width: auto; }
.hiw-artefact-caption { grid-column: 1 / -1; margin: 0; color: var(--site-muted); font-family: var(--site-font-mono); font-size: 0.78rem; }
.receipt--deny { border-color: color-mix(in srgb, var(--site-ember) 40%, var(--site-line)); }
@media (max-width: 640px) { .hiw-receipt-pair { grid-template-columns: 1fr; } }

.hiw-founder-note { max-width: 46rem; margin: clamp(2.5rem, 6vw, 4rem) 0 0; padding-left: var(--site-space-4); border-left: 1px solid var(--site-violet); }
.hiw-founder-note p { margin: 0; color: var(--site-bone); font-family: var(--site-font-display); font-size: 1.35rem; font-style: italic; font-weight: 400; line-height: 1.5; }
.hiw-founder-note cite { display: block; margin-top: var(--site-space-3); color: var(--site-muted); font-family: var(--site-font-mono); font-size: 0.75rem; font-style: normal; letter-spacing: 0.08em; }

.hiw-status-line { margin: var(--site-space-2) 0 clamp(2.5rem, 6vw, 4rem); color: var(--site-muted); font-family: var(--site-font-mono); font-size: 0.8rem; line-height: 1.7; }

.hiw-faq { display: grid; gap: clamp(2rem, 5vw, 3rem); }
.hiw-faq__item { padding-top: clamp(1.5rem, 4vw, 2rem); border-top: 1px solid var(--site-line); }
.hiw-faq__item:first-child { border-top: 0; padding-top: 0; }
.hiw-faq__q { max-width: 34ch; margin: 0 0 var(--site-space-3); color: var(--site-bone); font-family: var(--site-font-display); font-size: clamp(1.4rem, 2.6vw, 1.9rem); font-weight: 400; font-style: italic; line-height: 1.2; }

.hiw-next { display: block; padding: clamp(1.5rem, 4vw, 2.5rem); margin-bottom: clamp(2rem, 5vw, 3rem); border: 1px solid var(--site-line); border-radius: 0.375rem; background: var(--site-band); text-decoration: none; transition: border-color var(--site-motion-fast), background-color var(--site-motion-fast); }
.hiw-next:hover, .hiw-next:focus-visible { border-color: var(--site-violet); background: var(--site-panel); }
.hiw-next__title { display: block; margin-top: var(--site-space-2); color: var(--site-bone); font-family: var(--site-font-display); font-size: clamp(1.5rem, 3vw, 2rem); }
.hiw-next__line { display: block; margin-top: var(--site-space-2); color: var(--site-muted); }