:root {
    /* Colour Palette: Arctic Clean */
    --bg-ground: #eef4f7;
    --bg-sheet: #f7fafc;
    --bg-surface: #ffffff;
    --ink-main: #0f172a;
    --ink-muted: #475569;
    --ink-subtle: #64748b;
    --accent-glacier: #0e7490;
    --accent-glacier-soft: #e0f2fe;
    --border-grid: #cbd5e1;

    --ink-error: #991b1b;
    --bg-error-soft: #fef2f2;
    --border-error: #f87171;
    --ink-success: #065f46;
    --bg-success-soft: #ecfdf5;
    --border-success: #6ee7b7;

    --baje-fce: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --baje-781: "Zilla Slab", Georgia, 'Times New Roman', serif;
    --baje-bec: 'Space Mono', Consolas, "Liberation Mono", Menlo, monospace;

    --step--1: clamp(0.8125rem, 0.78rem + 0.16vw, 0.9rem);
    --baje-336: clamp(1rem, 0.96rem + 0.22vw, 1.125rem);
    --baje-ddb: clamp(1.2rem, 1.12rem + 0.42vw, 1.44rem);
    --baje-c6b: clamp(1.44rem, 1.3rem + 0.72vw, 1.85rem);
    --baje-d55: clamp(1.728rem, 1.5rem + 1.15vw, 2.38rem);
    --baje-38b: clamp(2.074rem, 1.72rem + 1.77vw, 3.05rem);
    --baje-7af: clamp(2.488rem, 1.95rem + 2.7vw, 3.9rem);

    --step-hero: clamp(2.85rem, 2.1rem + 3.8vw, 5.25rem);

    --radius-none: 0px;
    --shell-max: 1240px;
    --shell-pad: clamp(1.25rem, 4vw, 3.5rem);
    --border-rule: 1px solid var(--border-grid);
    --border-rule-thick: 2px solid var(--ink-main);
    --border-rule-accent: 2px solid var(--accent-glacier);

    --space-3xs: clamp(0.25rem, 0.22rem + 0.15vw, 0.375rem);
    --space-2xs: clamp(0.5rem, 0.45rem + 0.25vw, 0.625rem);
    --space-xs: clamp(0.75rem, 0.7rem + 0.35vw, 1rem);
    --space-s: clamp(1rem, 0.9rem + 0.5vw, 1.375rem);
    --space-m: clamp(1.5rem, 1.35rem + 0.75vw, 2.125rem);
    --space-l: clamp(2rem, 1.75rem + 1.25vw, 3.25rem);
    --space-xl: clamp(3rem, 2.5rem + 2.5vw, 5rem);
    --space-2xl: clamp(4.5rem, 3.5rem + 5vw, 8rem);

    /* Motion & Timing */
    --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-snappy: cubic-bezier(0.4, 0, 0.2, 1);
    --dur-fast: 140ms;
    --dur-base: 220ms;
    --dur-deliberate: 420ms;

    /* Z-index elevation */
    --layer-base: 1;
    --layer-nav: 50;
    --layer-overlay: 100;
    --layer-dialog: 150;
    --layer-banner: 200;
    --layer-skip: 300;
}

/* Swiss Grid Clean Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    background-color: var(--bg-ground);
    color: var(--ink-main);
}

body {
    font-family: var(--baje-781);
    font-size: var(--baje-336);
    line-height: 1.62;
    font-weight: 400;
    background-color: var(--bg-ground);
    color: var(--ink-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Form Controls Reset */
input, button, textarea, select {
    font: inherit;

    color: inherit;
    letter-spacing: inherit;
    border-radius: var(--radius-none);
}

img, svg, picture {
    display: block;
    max-width: 100%;
    height: auto;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
    width: 100%;
}

a {
    color: var(--accent-glacier);
    text-decoration: underline;
    text-underline-offset: 0.2em;
    text-decoration-thickness: 1px;
    transition: color var(--dur-fast) var(--ease-snappy),
                            background-color var(--dur-fast) var(--ease-snappy);
}

a:hover {
    color: var(--ink-main);
    background-color: var(--accent-glacier-soft);
}

a:focus-visible {
    outline: 2px solid var(--accent-glacier);
    outline-offset: 3px;
}

/* Accessible Skip Navigation */
.skip-link {
    position: absolute;
    top: -999px;
    left: 1rem;
    z-index: var(--layer-skip);
    padding: 0.75rem 1.25rem;
    background: var(--ink-main);
    color: #ffffff;
    font-family: var(--baje-bec);
    font-size: var(--step--1);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-decoration: none;
    border: 1px solid #ffffff;
}

.skip-link:focus {
    top: 1rem;
    outline: 3px solid var(--accent-glacier);
}

.shell-container {
    width: 100%;
    max-width: var(--shell-max);
    margin-inline: auto;
    padding-inline: var(--shell-pad);
}

.shell-container--fluid {
    max-width: none;
    padding-inline: var(--shell-pad);
}

.shell-container--narrow {
    width: 100%;
    max-width: 820px;
    margin-inline: auto;
    padding-inline: var(--shell-pad);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--baje-fce);
    font-weight: 700;
    line-height: 1.1;
    color: var(--ink-main);
    letter-spacing: -0.025em;
    text-wrap: balance;
}

h1 {
    font-size: var(--baje-38b);
    letter-spacing: -0.035em;
}

h2 {
    font-size: var(--baje-d55);
    letter-spacing: -0.025em;
}

h3 {
    font-size: var(--baje-c6b);
    letter-spacing: -0.02em;
}

h4 {
    font-size: var(--baje-ddb);
}

/* Single-Verb Opener Typography Standard */
.verb-opener {
    font-family: var(--baje-fce);
    font-size: var(--baje-7af);
    font-weight: 700;
    line-height: 0.98;
    letter-spacing: -0.04em;
    color: var(--ink-main);
    margin-bottom: var(--space-s);
    display: block;
}

.reading-column {
    max-width: 68ch;
    margin-right: auto;
}

.reading-column p {
    font-size: var(--baje-336);
    line-height: 1.65;
    color: var(--ink-main);
    margin-bottom: var(--space-s);
}

.reading-column p.lead {
    font-size: var(--baje-ddb);
    line-height: 1.5;
    color: var(--ink-muted);
}

.text-meta {
    font-family: var(--baje-bec);
    font-size: var(--step--1);
    line-height: 1.45;
    color: var(--ink-muted);
    letter-spacing: -0.01em;
}

.text-subtle {
    color: var(--ink-subtle);
    font-size: var(--step--1);
}

.text-strong {
    font-weight: 700;
    color: var(--ink-main);
}

/* Visual Icons from Sprite */
.icon {
    width: 1.25em;
    height: 1.25em;
    display: inline-block;
    vertical-align: -0.2em;
    fill: currentColor;
    flex-shrink: 0;
}

.icon--sm {
    width: 1em;
    height: 1em;

}

.icon--lg {
    width: 1.75em;
    height: 1.75em;
}

/* Utility Helpers */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.flow > * + * {
    margin-top: var(--space-s);
}

.flow-l > * + * {
    margin-top: var(--space-l);
}

.flow-xl > * + * {
    margin-top: var(--space-xl);
}

.divider-line {
    border: 0;
    border-top: var(--border-rule);
    margin: 0;
    width: 100%;
}

.divider-line-thick {
    border: 0;
    border-top: var(--border-rule-thick);
    margin: 0;
    width: 100%;
}

.bleed-band {
    width: 100%;
    margin-block: var(--space-xl);
    border-top: var(--border-rule);
    border-bottom: var(--border-rule);
    background-color: var(--bg-sheet);
    overflow: hidden;
}

.bleed-band img {
    width: 100%;
    aspect-ratio: 3 / 2;
    height: auto;
    object-fit: cover;
    object-position: center;
    filter: contrast(102%) brightness(98%);
}

.caption-strip {
    padding: var(--space-xs) var(--shell-pad);
    max-width: var(--shell-max);
    margin-inline: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xs);
    border-bottom: var(--border-rule);
    background-color: var(--bg-surface);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}