/* ==========================================================================
   layer2.id — isometric technical schematic
   Palette: Blueprint Cyan, Drafting Slate, Stratum Gold, Vellum White,
            Deep Foundation, Graphite, Pencil Gray, Grid Line
   ========================================================================== */

:root {
    --blueprint-cyan: #3A7CA5;
    --drafting-slate: #2C3E50;
    --stratum-gold: #D4A843;
    --vellum-white: #F4F1EC;
    --deep-foundation: #0B1D2C;
    --graphite: #1C1C1E;
    --pencil-gray: #6B7B8D;
    --grid-line: #D1D9E0;

    --font-display: "Chakra Petch", "IBM Plex Sans", system-ui, sans-serif;
    --font-heading: "IBM Plex Sans", system-ui, sans-serif;
    --font-body: "IBM Plex Serif", Georgia, serif;
    --font-mono: "IBM Plex Mono", ui-monospace, monospace;

    --ease-precise: cubic-bezier(0.25, 0.1, 0.25, 1);

    --hatch: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 7px,
        rgba(209, 217, 224, 0.18) 7px,
        rgba(209, 217, 224, 0.18) 8px
    );
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--vellum-white);
    color: var(--graphite);
    line-height: 1.85;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Subtle vellum texture across the whole document */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(58, 124, 165, 0.03), transparent 60%),
        radial-gradient(ellipse at 50% 100%, rgba(11, 29, 44, 0.03), transparent 60%);
    z-index: 0;
}

.section {
    position: relative;
    width: 100%;
    padding: clamp(64px, 9vw, 120px) clamp(24px, 6vw, 96px);
    z-index: 1;
}

.section-heading {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    letter-spacing: 0.04em;
    color: var(--drafting-slate);
    line-height: 1.25;
}

.annotation__label,
.spec-card__label,
.cross__topology-caption,
.foundation__meta,
.peel__eyebrow,
.cross__eyebrow,
.peel__tick,
.dim-label,
.iso-layer__label,
.hero__chevron-text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--pencil-gray);
}

/* ==========================================================================
   SECTION 1 · HERO / ISOMETRIC STACK
   ========================================================================== */

.section--hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__hatching {
    position: absolute;
    inset: 0;
    background: var(--hatch);
    opacity: 0.55;
    pointer-events: none;
}

.annotation {
    position: absolute;
    display: flex;
    flex-direction: column;
    gap: 4px;
    z-index: 5;
}

.annotation--topleft {
    top: clamp(20px, 3vw, 40px);
    left: clamp(20px, 4vw, 60px);
}

.annotation--topright {
    top: clamp(20px, 3vw, 40px);
    right: clamp(20px, 4vw, 60px);
    text-align: right;
    align-items: flex-end;
}

.annotation__sub {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--pencil-gray);
    opacity: 0.7;
}

/* Isometric stage */
.iso-stage {
    position: relative;
    width: min(720px, 90vw);
    height: clamp(440px, 60vh, 600px);
    perspective: 1400px;
    perspective-origin: 50% 40%;
    z-index: 2;
}

.iso-stack {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    transform: rotateX(55deg) rotateZ(-45deg);
    transform-origin: 50% 50%;
    transition: transform 1200ms var(--ease-precise);
}

.iso-layer {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 360px;
    height: 220px;
    margin-left: -180px;
    margin-top: -110px;
    border: 1px solid var(--drafting-slate);
    background: var(--vellum-white);
    box-shadow: 0 1px 0 rgba(11, 29, 44, 0.04);
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 14px 18px;
    opacity: 0;
    transform: translateZ(0px) translateY(20px);
    transition:
        transform 700ms var(--ease-precise),
        opacity 700ms var(--ease-precise),
        border-color 400ms var(--ease-precise);
}

.iso-layer__grid {
    position: absolute;
    inset: 6px;
    background-image:
        linear-gradient(to right, rgba(209, 217, 224, 0.45) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(209, 217, 224, 0.45) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
}

.iso-layer__label {
    position: relative;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(44, 62, 80, 0.55);
    z-index: 2;
}

.iso-layer--featured,
.iso-layer__label--featured {
    color: var(--drafting-slate);
}

/* Vertical separation along Z-axis when active */
.iso-stack.is-ready .iso-layer--1 { transform: translateZ(-160px) translateY(0); opacity: 1; }
.iso-stack.is-ready .iso-layer--2 { transform: translateZ(-80px)  translateY(0); opacity: 1; }
.iso-stack.is-ready .iso-layer--3 { transform: translateZ(0px)    translateY(0); opacity: 1; }
.iso-stack.is-ready .iso-layer--4 { transform: translateZ(80px)   translateY(0); opacity: 1; }
.iso-stack.is-ready .iso-layer--5 { transform: translateZ(160px)  translateY(0); opacity: 1; }

.iso-layer--1 { background: rgba(209, 217, 224, 0.35); }
.iso-layer--2 {
    border-width: 2px;
    border-color: var(--drafting-slate);
    background: var(--vellum-white);
    box-shadow:
        0 0 0 1px rgba(58, 124, 165, 0.25),
        0 12px 40px -10px rgba(58, 124, 165, 0.45);
}
.iso-layer--3 { background: rgba(244, 241, 236, 0.92); }
.iso-layer--4 { background: rgba(244, 241, 236, 0.85); }
.iso-layer--5 { background: rgba(244, 241, 236, 0.78); }

.iso-layer--3,
.iso-layer--4,
.iso-layer--5 {
    border-color: rgba(44, 62, 80, 0.5);
}

/* Stratum gold accent line on top edge of L2 */
.iso-layer__accent {
    position: absolute;
    top: -2px;
    left: 0;
    height: 2px;
    width: 0;
    background: var(--stratum-gold);
    transition: width 600ms var(--ease-precise);
}
.iso-stack.is-ready .iso-layer--2 .iso-layer__accent {
    width: 100%;
    transition-delay: 1100ms;
}

/* Title sitting on Layer 2 */
.iso-layer__title {
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    transform: translateY(-50%) rotateZ(45deg) rotateX(-55deg);
    transform-origin: 50% 50%;
    text-align: center;
    pointer-events: none;
}

.hero__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.2rem, 6vw, 4.6rem);
    letter-spacing: 0.12em;
    color: var(--drafting-slate);
    text-transform: uppercase;
    text-shadow: 2px 2px 0 rgba(11, 29, 44, 0.18);
    line-height: 1;
    opacity: 0;
    transition: opacity 600ms var(--ease-precise) 1000ms;
}
.iso-stack.is-ready .hero__title { opacity: 1; }

.hero__subtitle {
    display: block;
    margin-top: 10px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--pencil-gray);
    opacity: 0;
    transition: opacity 500ms var(--ease-precise) 1300ms;
}
.iso-stack.is-ready .hero__subtitle { opacity: 1; }

/* Vertical dimension line right of stack */
.dim-line {
    position: absolute;
    right: -4%;
    top: 12%;
    width: 32px;
    height: 76%;
    overflow: visible;
    z-index: 3;
}
.dim__cap,
.dim__shaft {
    stroke: var(--grid-line);
    stroke-width: 1;
    fill: none;
    opacity: 0.85;
}
.dim__shaft {
    stroke-dasharray: 360;
    stroke-dashoffset: 360;
    animation: dim-draw 1100ms var(--ease-precise) forwards 600ms;
}
.dim-label--right {
    position: absolute;
    right: -10%;
    top: 50%;
    transform: rotate(90deg);
    transform-origin: right center;
    color: var(--pencil-gray);
    opacity: 0;
    animation: fade-in 500ms var(--ease-precise) forwards 1500ms;
}

@keyframes dim-draw {
    to { stroke-dashoffset: 0; }
}
@keyframes fade-in {
    to { opacity: 1; }
}

/* Chevron */
.hero__chevron {
    position: absolute;
    bottom: clamp(20px, 4vh, 50px);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--pencil-gray);
    animation: chevron-breathe 3s ease-in-out infinite 1800ms;
    opacity: 0;
}
.hero__chevron-text {
    font-size: 0.65rem;
    letter-spacing: 0.32em;
}
@keyframes chevron-breathe {
    0%, 100% { opacity: 0.35; transform: translateX(-50%) translateY(0); }
    50%      { opacity: 0.85; transform: translateX(-50%) translateY(4px); }
}

/* ==========================================================================
   SECTION 2 · PEEL-APART
   ========================================================================== */

.section--peel {
    min-height: 200vh;
    background: var(--vellum-white);
    position: relative;
}

.section--peel::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--hatch);
    opacity: 0.35;
    pointer-events: none;
}

.peel__rail {
    position: absolute;
    left: clamp(24px, 4vw, 60px);
    top: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    z-index: 4;
    pointer-events: none;
}
.peel__tick {
    color: var(--pencil-gray);
    opacity: 0.6;
    border-left: 1px solid var(--grid-line);
    padding-left: 10px;
}

.peel__viewport {
    position: sticky;
    top: 0;
    height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.peel__stack {
    position: relative;
    width: min(900px, 88vw);
    height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 18px;
}

.peel__layer {
    position: relative;
    border: 1px solid var(--drafting-slate);
    background: var(--vellum-white);
    height: 70px;
    display: flex;
    align-items: center;
    padding: 0 24px;
    transition:
        transform 700ms var(--ease-precise),
        opacity 700ms var(--ease-precise),
        height 700ms var(--ease-precise),
        border-color 400ms var(--ease-precise),
        box-shadow 700ms var(--ease-precise);
}

.peel__layer span {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--pencil-gray);
}

.peel__layer--feature {
    height: 70px;
    border-width: 2px;
    box-shadow:
        0 0 0 1px rgba(58, 124, 165, 0.18),
        0 8px 30px -10px rgba(58, 124, 165, 0.35);
}

.peel__layer--feature::before {
    content: "";
    position: absolute;
    top: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--stratum-gold);
    transition: width 700ms var(--ease-precise);
}

.peel__feature-content {
    position: relative;
    width: 100%;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 600ms var(--ease-precise), transform 600ms var(--ease-precise);
    pointer-events: none;
}

.peel__title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    letter-spacing: 0.04em;
    color: var(--drafting-slate);
    line-height: 1.2;
}

.peel__body {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.4vw, 1.1rem);
    line-height: 1.85;
    color: var(--graphite);
    max-width: 60ch;
}

.peel__body--italic {
    font-style: italic;
    color: var(--pencil-gray);
}

/* Peel state: progress 0..1 stored on stack as --p */
.peel__stack {
    --p: 0;
}

.peel__layer--5 { transform: translateY(calc(var(--p) * -260px)) scale(calc(1 - (var(--p) * 0.1))); opacity: calc(1 - (var(--p) * 0.8)); }
.peel__layer--4 { transform: translateY(calc(var(--p) * -130px)) scale(calc(1 - (var(--p) * 0.06))); opacity: calc(1 - (var(--p) * 0.8)); }
.peel__layer--3 { transform: translateY(calc(var(--p) * -60px)); opacity: calc(1 - (var(--p) * 0.8)); }
.peel__layer--1 { transform: translateY(calc(var(--p) * 60px));  opacity: calc(1 - (var(--p) * 0.8)); }

.peel__layer--feature {
    height: calc(70px + (var(--p) * 360px));
    align-items: center;
    justify-content: center;
}
.peel__layer--feature span { display: none; }
.peel__layer--feature .peel__feature-content {
    opacity: var(--p);
    transform: translateY(calc((1 - var(--p)) * 8px));
}
.peel__stack.peeled .peel__layer--feature::before {
    width: 100%;
}

/* Exploded-view chevrons */
.peel__arrow {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    color: var(--pencil-gray);
    opacity: 0;
    transition: opacity 400ms var(--ease-precise), transform 400ms var(--ease-precise);
}
.peel__arrow--up   { top: 14%; }
.peel__arrow--down { bottom: 14%; }
.peel__stack.peeled ~ .peel__arrow,
.peel__viewport .peel__arrow { /* keep selectors valid */ }
.peel__stack.peeled + .peel__arrow,
.peel__viewport[data-peeled="1"] .peel__arrow {
    opacity: 0.7;
}
.peel__viewport[data-peeled="1"] .peel__arrow--up   { transform: translateX(-50%) translateY(-6px); }
.peel__viewport[data-peeled="1"] .peel__arrow--down { transform: translateX(-50%) translateY(6px); }

/* ==========================================================================
   SECTION 3 · CROSS-SECTION
   ========================================================================== */

.section--cross {
    position: relative;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 40px;
    overflow: hidden;
}

.cross__diagonal {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.cross__dim {
    width: 100%;
    height: 100%;
    overflow: visible;
}

.cross__shaft {
    stroke: var(--blueprint-cyan);
    stroke-width: 1;
    stroke-dasharray: 4 6;
    opacity: 0.4;
}

.cross__topology {
    grid-column: 1;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
    justify-content: flex-start;
    padding: clamp(20px, 4vw, 60px) clamp(20px, 3vw, 40px);
    z-index: 2;
}

.cross__eyebrow {
    color: var(--blueprint-cyan);
}

.topology {
    width: 100%;
    max-width: 480px;
    height: auto;
}

.topology__edges line {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    transition: stroke-dashoffset 900ms var(--ease-precise);
}
.section--cross.is-visible .topology__edges line {
    stroke-dashoffset: 0;
}
.topology__edges line:nth-child(1) { transition-delay: 50ms; }
.topology__edges line:nth-child(2) { transition-delay: 120ms; }
.topology__edges line:nth-child(3) { transition-delay: 190ms; }
.topology__edges line:nth-child(4) { transition-delay: 260ms; }
.topology__edges line:nth-child(5) { transition-delay: 330ms; }
.topology__edges line:nth-child(6) { transition-delay: 400ms; }
.topology__edges line:nth-child(7) { transition-delay: 470ms; }
.topology__edges line:nth-child(8) { transition-delay: 540ms; }
.topology__edges line:nth-child(9) { transition-delay: 610ms; }
.topology__edges line:nth-child(10) { transition-delay: 680ms; }

.topology__node--core {
    fill: var(--stratum-gold);
}

.cross__topology-caption {
    color: var(--pencil-gray);
}

.cross__text {
    grid-column: 2;
    grid-row: 2;
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: clamp(20px, 4vw, 60px) clamp(20px, 3vw, 40px);
    align-self: end;
    z-index: 2;
    max-width: 56ch;
    justify-self: end;
}

.cross__text p {
    font-size: clamp(0.95rem, 1.4vw, 1.1rem);
    line-height: 1.85;
    color: var(--graphite);
}

/* ==========================================================================
   SECTION 4 · SPECIFICATION PANEL (BENTO)
   ========================================================================== */

.section--spec {
    background: var(--vellum-white);
    position: relative;
}

.spec__header {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: clamp(40px, 5vw, 64px);
    max-width: 720px;
}

.spec__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: clamp(16px, 2vw, 28px);
    perspective: 1400px;
}

.spec-card {
    position: relative;
    background: var(--vellum-white);
    border: 1px solid var(--grid-line);
    padding: 28px 24px 26px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transform: perspective(1200px) rotateX(0deg);
    transition:
        transform 200ms ease,
        box-shadow 200ms ease,
        border-color 200ms ease;
    box-shadow: 0 4px 12px rgba(11, 29, 44, 0.05);
    overflow: hidden;
    opacity: 0;
    translate: 0 16px;
}

.section--spec.is-visible .spec-card {
    opacity: 1;
    translate: 0 0;
    transition:
        opacity 600ms var(--ease-precise),
        translate 600ms var(--ease-precise),
        transform 200ms ease,
        box-shadow 200ms ease,
        border-color 200ms ease;
}

.section--spec.is-visible .spec-card:nth-child(1) { transition-delay: 60ms,  60ms,  0s, 0s, 0s; }
.section--spec.is-visible .spec-card:nth-child(2) { transition-delay: 140ms, 140ms, 0s, 0s, 0s; }
.section--spec.is-visible .spec-card:nth-child(3) { transition-delay: 220ms, 220ms, 0s, 0s, 0s; }
.section--spec.is-visible .spec-card:nth-child(4) { transition-delay: 300ms, 300ms, 0s, 0s, 0s; }
.section--spec.is-visible .spec-card:nth-child(5) { transition-delay: 380ms, 380ms, 0s, 0s, 0s; }
.section--spec.is-visible .spec-card:nth-child(6) { transition-delay: 460ms, 460ms, 0s, 0s, 0s; }

.spec-card__top {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent, var(--blueprint-cyan));
}

.spec-card__icon {
    width: 36px;
    height: 36px;
    fill: none;
    stroke: var(--accent, var(--blueprint-cyan));
    stroke-width: 1.25;
    stroke-linecap: round;
    stroke-linejoin: round;
    color: var(--accent, var(--blueprint-cyan));
}

.spec-card__label {
    color: var(--drafting-slate);
}

.spec-card__copy {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.2vw, 1.05rem);
    line-height: 1.7;
    color: var(--graphite);
    max-width: 36ch;
}

.spec-card:hover {
    transform: perspective(1200px) translateY(-4px) rotateX(2deg);
    box-shadow: 0 8px 24px rgba(11, 29, 44, 0.12);
    border-color: var(--drafting-slate);
}

/* Dimension lines between sections */
.section--spec::before,
.section--cross::before {
    content: "";
    position: absolute;
    top: 0;
    left: clamp(24px, 6vw, 96px);
    right: clamp(24px, 6vw, 96px);
    height: 1px;
    background: var(--grid-line);
    opacity: 0.6;
}

/* ==========================================================================
   SECTION 5 · IDENTITY LAYER
   ========================================================================== */

.section--identity {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: clamp(80px, 12vw, 160px) clamp(24px, 6vw, 96px);
}

.identity__watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    width: min(720px, 86vw);
    height: min(720px, 86vw);
    transform: translate(-50%, -50%);
    opacity: 0.06;
    pointer-events: none;
    z-index: 1;
}

.identity__paths path,
.identity__paths circle {
    stroke-dasharray: 800;
    stroke-dashoffset: 800;
    transition: stroke-dashoffset 2000ms var(--ease-precise);
}

.section--identity.is-visible .identity__paths path,
.section--identity.is-visible .identity__paths circle {
    stroke-dashoffset: 0;
}

.identity__content {
    position: relative;
    z-index: 2;
    max-width: 540px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 22px;
    text-align: left;
}

.identity__heading {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    letter-spacing: 0.04em;
    color: var(--drafting-slate);
    line-height: 1.25;
}

.identity__body {
    font-family: var(--font-body);
    font-size: clamp(1.15rem, 2vw, 1.35rem);
    line-height: 1.85;
    color: var(--graphite);
}

.identity__body em {
    color: var(--blueprint-cyan);
    font-style: italic;
}

.identity__signature {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--pencil-gray);
    margin-top: 12px;
}

/* ==========================================================================
   SECTION 6 · FOUNDATION (FOOTER)
   ========================================================================== */

.section--foundation {
    background: var(--deep-foundation);
    color: var(--vellum-white);
    padding: clamp(60px, 8vw, 120px) clamp(24px, 6vw, 96px);
    position: relative;
    overflow: hidden;
}

.foundation__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, rgba(209, 217, 224, 0.04) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(209, 217, 224, 0.04) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
}

.foundation__inner {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 28px;
    align-items: center;
    text-align: center;
}

.foundation__lockup {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.foundation__brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    letter-spacing: 0.18em;
    color: var(--vellum-white);
    text-transform: uppercase;
}

.foundation__tag {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--grid-line);
    opacity: 0.7;
}

.foundation__base {
    width: 280px;
    max-width: 80%;
    height: auto;
    opacity: 0.85;
}

.foundation__meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    color: var(--grid-line);
    opacity: 0.7;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

/* ==========================================================================
   LINKS / GLOBAL INTERACTIONS
   ========================================================================== */

a {
    color: var(--blueprint-cyan);
    text-decoration: none;
    position: relative;
}

a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width 250ms var(--ease-precise);
}

a:hover::after {
    width: 100%;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

@media (max-width: 900px) {
    .iso-stage {
        height: 420px;
    }
    .iso-layer {
        width: 280px;
        height: 170px;
        margin-left: -140px;
        margin-top: -85px;
    }

    .section--cross {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
    }
    .cross__topology { grid-column: 1; grid-row: 1; }
    .cross__text     { grid-column: 1; grid-row: 2; justify-self: stretch; }

    .spec__grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }

    .annotation--topright { display: none; }
}

@media (max-width: 600px) {
    .hero__title { font-size: clamp(1.8rem, 9vw, 2.6rem); }
    .iso-stage { height: 360px; }
    .iso-layer {
        width: 240px;
        height: 150px;
        margin-left: -120px;
        margin-top: -75px;
    }
    .peel__rail { display: none; }
}