/* ============================================================
   LAYER 2 · layout, chrome and type utilities.
   Breakpoints used across the class layer (literals — media queries
   can't read custom properties): 1120 / 900 / 768 / 560.
   ============================================================ */

/* Content column. */
.ep-container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--space-4) }

/* Page ground — the scroll shell only, never a section. */
.ep-page-ground { background: var(--page-bg); color: var(--text-primary) }

/* Snap shell. Snapping is a large-viewport affordance: below 900 the
   sections are auto-height, so snapping would fight the user. */
.ep-shell { scroll-snap-type: y proximity }
@media (max-width: 900px) { .ep-shell { scroll-snap-type: none } }

/* Full-viewport section. Pair with a band for the ground. */
.ep-section { scroll-snap-align: start; min-height: 100svh; padding: var(--section-pad-y) var(--section-pad-x); display: flex; flex-direction: column; justify-content: center }
.ep-section--center { align-items: center; text-align: center }
@media (max-width: 900px) { .ep-section { scroll-snap-align: none; min-height: 0; height: auto; padding-top: 64px; padding-bottom: 64px } }
.ep-band-a { background: var(--band-a) }
.ep-band-b { background: var(--band-b) }

/* Split hero: copy column beside the mockup carousel. */
.ep-hero { scroll-snap-align: start; height: 100svh; box-sizing: border-box; padding: clamp(134px, 16vh, 158px) var(--section-pad-x) clamp(24px, 5vh, 56px); display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); grid-template-rows: minmax(0, 1fr); align-items: center; gap: clamp(28px, 4vw, 56px) }
@media (max-width: 900px) { .ep-hero { height: auto; grid-template-columns: 1fr; grid-template-rows: auto; padding-top: 134px; padding-bottom: 64px } }

/* Responsive grids — the only column logic consumers should need. */
.ep-grid { display: grid; gap: var(--space-5) }
.ep-grid--airy { gap: clamp(6px, 2.2vh, 36px) clamp(24px, 3.4vw, 48px) }
.ep-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)) }
.ep-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)) }
.ep-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)) }
@media (max-width: 900px) { .ep-grid--3, .ep-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)) } }
@media (max-width: 768px) { .ep-grid--2, .ep-grid--3, .ep-grid--4 { grid-template-columns: 1fr } }

/* Footer column set: brand block beside two link columns. */
.ep-footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px }
@media (max-width: 768px) { .ep-footer-cols { grid-template-columns: 1fr; gap: 28px } }

/* A row of items separated by hairlines that becomes a stack. */
.ep-split { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)) }
.ep-split > * { border-right: 1px solid var(--border-default); padding: clamp(14px, 2.4vh, 22px) clamp(14px, 2vw, 24px) 0 }
.ep-split > *:first-child { padding-left: 0 }
.ep-split > *:last-child { border-right: 0; padding-right: 0 }
@media (max-width: 900px) { .ep-split { grid-template-columns: 1fr } .ep-split > * { border-right: 0; border-bottom: 1px solid var(--border-default); padding: 18px 0 } .ep-split > *:last-child { border-bottom: 0 } }

/* Heading-beside-copy rows that stack on narrow viewports. */
.ep-stack-row { display: flex; align-items: center; justify-content: space-between; gap: clamp(20px, 2.8vw, 40px) }
.ep-stack-row--end { align-items: flex-end }
@media (max-width: 900px) { .ep-stack-row { flex-direction: column; align-items: flex-start; gap: 14px } }

/* ---------- Chrome ---------- */

/* Frosted nav shell — the one glass surface in the system. */
.ep-nav-shell { max-width: var(--container); margin-inline: auto; padding-inline: 22px; border-radius: var(--radius-nav); backdrop-filter: var(--nav-blur); -webkit-backdrop-filter: var(--nav-blur); background: var(--nav-bg); border: 1px solid var(--nav-border); box-shadow: var(--shadow-nav) }
.ep-nav-shell--wide { max-width: none; padding-inline: 16px }

/* Nav link with the gradient underline that grows left-to-right. */
.ep-nav-link { position: relative; display: inline-flex; align-items: center; height: var(--navbar-height); color: var(--text-secondary); font-weight: var(--fw-medium); font-size: 15px; cursor: pointer; background-image: var(--gradient-brand); background-repeat: no-repeat; background-position: left calc(50% + 13px); background-size: 0% 2px; transition: color var(--duration-fast) var(--ease-standard), background-size var(--duration-base) var(--ease-standard) }
.ep-nav-link:hover, .ep-nav-link:focus-visible { color: var(--text-primary); background-size: 100% 2px }
.ep-nav-link--active { color: var(--text-primary); background-size: 100% 2px }

/* The link row itself is optional chrome: below 900 the page relies on
   in-page anchors and the CTA, so it drops rather than wrapping. */
.ep-nav-links { display: flex; align-items: center; gap: clamp(14px, 1.9vw, 28px) }
@media (max-width: 900px) { .ep-nav-links { display: none } }

/* Carousel prev/next is redundant with the tab row — it goes first. */
.ep-carousel-nav { display: inline-flex; align-items: center; gap: 8px }
@media (max-width: 1120px) { .ep-carousel-nav { display: none } }

/* Paired CTAs: side by side, stacked and full-width on a phone. */
.ep-cta-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap }
.ep-section--center .ep-cta-row { justify-content: center }
@media (max-width: 560px) { .ep-cta-row { flex-direction: column; align-items: stretch; width: 100%; max-width: 340px } .ep-cta-row > .ep-btn { width: 100% } }

/* Equal-width carousel tab bar. */
.ep-tabs { display: flex; gap: 8px; flex: 1; min-width: 0 }
.ep-tab { flex: 1 1 0; min-width: 0; height: 34px; padding: 0 8px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--radius-btn-sm); border: 1px solid var(--border-default); background: transparent; color: var(--text-muted); font-family: var(--font-sans); font-size: 13px; font-weight: var(--fw-medium); cursor: pointer; white-space: nowrap; transition: background var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard) }
.ep-tab:hover { color: var(--text-primary); background: var(--surface-sunken) }
.ep-tab--active { font-weight: var(--fw-semibold); border-color: var(--tint-border); background: var(--accent-tint); color: var(--on-tint) }
@media (max-width: 560px) { .ep-tabs { flex-wrap: wrap } .ep-tab { flex: 1 1 40% } }

/* ---------- Type utilities ---------- */
.ep-eyebrow { font-size: var(--fs-caption); font-weight: var(--fw-semibold); text-transform: uppercase; letter-spacing: var(--tracking-widest); color: var(--accent) }
.ep-caption { font-size: var(--fs-caption); line-height: var(--lh-caption); color: var(--text-muted) }
.ep-num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-weight: var(--fw-regular) }

/* Identity gradient as a text fill — one phrase or figure per band. */
.ep-gradient-text { background: var(--gradient-display); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; display: inline-block }

/* Marketing display heading, fluid. */
.ep-display { font-size: clamp(30px, min(3.9vw, 6.2vh), 56px); line-height: var(--lh-display); letter-spacing: var(--tracking-display); font-weight: var(--fw-display); color: var(--text-primary); text-wrap: pretty; margin: 0 }
.ep-display--sm { font-size: clamp(25px, min(3vw, 4.8vh), 44px); line-height: 1.1 }
.ep-lede { font-size: clamp(15px, min(1.4vw, 2.2vh), 19px); line-height: 1.6; color: var(--text-secondary); text-wrap: pretty; margin: 0 }

/* Accent-tint chip — live badges, keyword tags, capability pills. */
.ep-tint-chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px; border-radius: var(--radius-md); background: var(--accent-tint); border: 1px solid var(--tint-border); color: var(--on-tint); font-size: var(--fs-caption); font-weight: var(--fw-medium) }
.ep-tint-chip--eyebrow { height: 32px; padding: 0 12px; border-radius: var(--radius-md); font-size: 12px; font-weight: var(--fw-semibold); letter-spacing: .1em; text-transform: uppercase }