/* ==========================================================================
   Black Pearl Energy & Commodities
   ========================================================================== */

:root {
    /* Palette */
    --abyss: #0D2230;
    --petrol: #16384A;
    --nacre: #F2F3EF;
    --white: #FFFFFF;
    --graphite: #1E2A30;
    --slate: #5B6B73;
    --lustre: #B09A6C;
    --rule: #D5DBD8;
    --rule-strong: #1E2A30;
    --on-dark: #E9EDEB;
    --on-dark-muted: #A2B3BB;
    --on-dark-rule: rgba(233, 237, 235, .16);
    --line-dark: #5F8497;
    --success: #2D6A4F;
    --error: #A33A2F;

    /* Type */
    --serif: "Spectral", "Iowan Old Style", Georgia, serif;
    --sans: "Public Sans", "Segoe UI", system-ui, sans-serif;
    --fs-small: .875rem;
    --fs-body: 1.0625rem;
    --fs-lead: clamp(1.25rem, 1.1rem + .6vw, 1.5rem);
    --fs-h3: clamp(1.3rem, 1.2rem + .4vw, 1.55rem);
    --fs-h2: clamp(1.85rem, 1.5rem + 1.4vw, 2.6rem);
    --fs-h1: clamp(2.5rem, 1.6rem + 3.6vw, 4.75rem);

    /* Layout */
    --wrap: 1240px;
    --gutter: clamp(16px, 4vw, 48px);
    --section: clamp(64px, 8vw, 120px);
    --header-h: 76px;
    --focus: var(--petrol);
}

*, *::before, *::after { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 64px);
}

body {
    margin: 0;
    background: var(--white);
    color: var(--graphite);
    font-family: var(--sans);
    font-size: var(--fs-body);
    line-height: 1.6;
    font-feature-settings: "kern", "liga";
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 { margin: 0; font-weight: 400; }
p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }

a { color: inherit; }

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

.wrap {
    width: 100%;
    max-width: var(--wrap);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.skip-link {
    position: absolute;
    left: 16px; top: -100px;
    z-index: 100;
    padding: 10px 16px;
    background: var(--nacre);
    color: var(--abyss);
    font-weight: 600;
}
.skip-link:focus { top: 12px; }

/* Dark surfaces ----------------------------------------------------------- */

.site-header,
.hero,
.page-hero,
.closing,
.site-footer {
    --focus: var(--nacre);
    color: var(--on-dark);
}

/* Buttons and links ------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 26px;
    border: 1px solid transparent;
    border-radius: 2px;
    font: 600 .9375rem/1 var(--sans);
    letter-spacing: .01em;
    text-decoration: none;
    cursor: pointer;
    transition: background-color .2s ease, color .2s ease;
}
.btn--small { min-height: 40px; padding: 0 18px; font-size: .875rem; }
.btn--light { background: var(--nacre); color: var(--abyss); }
.btn--light:hover { background: var(--white); }
.btn--dark { background: var(--abyss); color: var(--nacre); }
.btn--dark:hover { background: var(--petrol); }

.text-link {
    display: inline-block;
    color: var(--petrol);
    font-weight: 600;
    font-size: .9375rem;
    text-decoration: underline;
    text-decoration-color: var(--lustre);
    text-decoration-thickness: 1px;
    text-underline-offset: 6px;
}
.text-link:hover { text-decoration-thickness: 2px; }

.link-light {
    color: var(--on-dark);
    font-weight: 500;
    text-decoration: underline;
    text-decoration-color: var(--lustre);
    text-underline-offset: 6px;
}
.link-light:hover { color: var(--white); text-decoration-thickness: 2px; }

/* Brand ------------------------------------------------------------------- */

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--on-dark);
    text-decoration: none;
}
.brand .mark { width: 38px; height: 38px; flex: none; }
.brand__logo { width: auto; height: auto; max-height: 46px; max-width: 240px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name {
    font-family: var(--serif);
    font-size: 1.4rem;
    font-weight: 400;
    letter-spacing: .01em;
}
.brand__sub {
    margin-top: 3px;
    color: var(--on-dark-muted);
    font-size: .75rem;
    letter-spacing: .04em;
}

/* Header ------------------------------------------------------------------ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--abyss);
    border-bottom: 1px solid transparent;
    transition: border-color .3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--on-dark-rule); }

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: var(--header-h);
}

.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav ul { display: flex; gap: 26px; }
.site-nav ul a {
    position: relative;
    display: block;
    padding: 8px 0;
    color: var(--on-dark-muted);
    font-size: .9375rem;
    font-weight: 500;
    text-decoration: none;
    transition: color .2s ease;
}
.site-nav ul a:hover { color: var(--on-dark); }
.site-nav ul a[aria-current="page"] { color: var(--on-dark); }
.site-nav ul a[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 1px;
    background: var(--lustre);
}

.nav-toggle {
    display: none;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border: 0;
    background: none;
    color: var(--on-dark);
    font: 500 .9375rem var(--sans);
    cursor: pointer;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
    display: block;
    width: 20px; height: 1.5px;
    background: currentColor;
    transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before,
.nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1100px) {
    .nav-toggle { display: inline-flex; }
    .site-nav {
        position: fixed;
        inset: var(--header-h) 0 0 0;
        flex-direction: column;
        align-items: stretch;
        gap: 24px;
        max-height: calc(100vh - var(--header-h));
        overflow-y: auto;
        padding: 16px var(--gutter) 32px;
        background: var(--abyss);
        border-top: 1px solid var(--on-dark-rule);
        visibility: hidden;
        opacity: 0;
        transform: translateY(-8px);
        transition: opacity .2s ease, transform .2s ease, visibility 0s linear .2s;
    }
    .site-nav.is-open {
        visibility: visible;
        opacity: 1;
        transform: none;
        transition: opacity .2s ease, transform .2s ease;
    }
    .site-nav ul { flex-direction: column; gap: 0; }
    .site-nav ul a {
        padding: 14px 0;
        border-bottom: 1px solid var(--on-dark-rule);
        font-family: var(--serif);
        font-size: 1.35rem;
        color: var(--on-dark);
    }
    .site-nav ul a[aria-current="page"]::after { display: none; }
    .site-nav ul a[aria-current="page"] { color: var(--lustre); }
    .site-nav__cta { align-self: flex-start; }
}

/* Seismic motif ----------------------------------------------------------- */

.seismic {
    position: absolute;
    inset: auto 0 0 0;
    width: 100%;
    height: 100%;
    color: var(--line-dark);
    pointer-events: none;
}
.seismic path { vector-effect: non-scaling-stroke; }

/* Home hero --------------------------------------------------------------- */

.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--abyss);
}

/* On desktop the hero fills the screen below the header, facts pinned to the bottom */
@media (min-width: 901px) {
    .hero { min-height: calc(100vh - var(--header-h)); min-height: calc(100svh - var(--header-h)); }
    .hero__inner { flex: 1; }
}

/* Short laptop screens: tighten the hero so it still fits without scrolling */
@media (min-width: 901px) and (max-height: 720px) {
    .hero__lede { font-size: .9375rem; line-height: 1.55; }
    .hero__actions { margin-top: 18px; }
    .hero__facts li { padding-top: 10px; padding-bottom: 10px; font-size: .8125rem; line-height: 1.4; }
    .supply__readout { padding-top: 10px; }
    .supply__name { font-size: 1.35rem; }
    .supply__scene { max-height: 27vh; }
    .supply__bar { margin-bottom: 2px; }
}

.hero__inner {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: clamp(32px, 5vw, 80px);
    padding-top: clamp(24px, 5vh, 72px);
    padding-bottom: clamp(24px, 5vh, 72px);
}

.hero__title {
    max-width: 16ch;
    font-family: var(--serif);
    font-size: clamp(2.2rem, min(1.4rem + 2.4vw, 6.2vh), 3.5rem);
    font-weight: 300;
    line-height: 1.04;
    letter-spacing: -.015em;
    color: var(--white);
}
.hero__lede {
    max-width: 56ch;
    margin-top: clamp(14px, 3vh, 28px);
    color: var(--on-dark-muted);
    font-size: clamp(1rem, 2.1vh, 1.125rem);
    line-height: 1.6;
}
.hero__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 32px;
    margin-top: clamp(20px, 4vh, 40px);
}

.hero__facts {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--on-dark-rule);
}
.hero__facts li {
    padding: clamp(12px, 2.2vh, 22px) 24px clamp(14px, 3vh, 30px) 0;
    color: var(--on-dark-muted);
    font-size: var(--fs-small);
    line-height: 1.5;
}
.hero__facts li + li { padding-left: 24px; border-left: 1px solid var(--on-dark-rule); }
.hero__facts strong { display: block; color: var(--on-dark); font-weight: 600; }

/* Supply scene ------------------------------------------------------------ */

.supply {
    --cargo: #9A6A36;
    --scene-line: #7F98A5;
    min-width: 0;
}

.supply__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 8px;
}
.supply__stages {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 20px;
    color: var(--on-dark-muted);
    font-size: .8125rem;
}
.supply__stages li {
    position: relative;
    padding-left: 16px;
    transition: color .3s ease;
}
.supply__stages li::before {
    content: "";
    position: absolute;
    left: 0; top: .5em;
    width: 7px; height: 7px;
    border: 1px solid currentColor;
    border-radius: 50%;
    transition: background-color .3s ease, border-color .3s ease;
}
.supply__stages li.is-active { color: var(--white); }
.supply__stages li.is-active::before {
    border-color: var(--cargo);
    background: var(--cargo);
    box-shadow: 0 0 0 3px rgba(233, 237, 235, .12);
}
.supply__stages li.is-done { color: var(--on-dark); }
.supply__stages li.is-done::before { background: currentColor; }

.supply__pause {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: none;
    padding: 6px 0;
    border: 0;
    background: none;
    color: var(--on-dark-muted);
    font: 500 .8125rem var(--sans);
    cursor: pointer;
}
.supply__pause:hover { color: var(--on-dark); }
.supply__pause-icon {
    width: 10px; height: 10px;
    border-left: 3px solid currentColor;
    border-right: 3px solid currentColor;
}
.supply__pause[aria-pressed="true"] .supply__pause-icon {
    border: 0;
    border-left: 9px solid currentColor;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
}

.supply__scene {
    width: 100%;
    height: auto;
    overflow: visible;
    color: var(--scene-line);
}
.sc-line,
.sc-sea { fill: none; stroke: currentColor; stroke-width: 1.2; }
.sc-sea { stroke-width: 1; }
.sc-solid { fill: var(--abyss); stroke: currentColor; stroke-width: 1.2; }
.sc-land { fill: #10293A; }
.sc-label { fill: var(--on-dark-muted); font: 500 11px var(--sans); letter-spacing: .02em; }
.flare { fill: var(--lustre); }

.sc-cargo { fill: var(--cargo); transition: fill .6s ease; }
.tank__level,
.hull__cargo {
    transform-box: fill-box;
    transform-origin: 50% 100%;
    transition: transform 1.6s cubic-bezier(.4, 0, .2, 1), fill .6s ease;
}
.hull__cargo { opacity: .7; }

.ship { transition: transform 3.2s cubic-bezier(.45, .05, .3, 1); }
.ship__body { transition: transform 1.6s cubic-bezier(.4, 0, .2, 1); }
.supply.is-laden .ship__body { transform: translateY(3px); }
.supply.is-resetting .ship__body { transition: none; }
.supply.is-resetting .ship,
.supply.is-resetting .tank__level,
.supply.is-resetting .hull__cargo { transition: none; }

.wake { opacity: 0; transition: opacity .6s ease; }
.supply[data-stage="transit"] .wake { opacity: .8; }

.flow {
    fill: none;
    stroke: var(--cargo);
    stroke-width: 2.5;
    stroke-dasharray: 4 8;
    opacity: 0;
    transition: opacity .3s ease;
}
.supply[data-stage="load"] .flow--load,
.supply[data-stage="discharge"] .flow--discharge {
    opacity: 1;
    animation: flow .6s linear infinite;
}
@keyframes flow { to { stroke-dashoffset: -12; } }

.deck { display: none; }
.supply[data-vessel="tanker"] .deck--tanker,
.supply[data-vessel="gas"] .deck--gas,
.supply[data-vessel="bulk"] .deck--bulk { display: inline; }

.supply__tabs {
    display: flex;
    gap: 4px 22px;
    margin-top: clamp(6px, 1.6vh, 14px);
    overflow-x: auto;
    border-bottom: 1px solid var(--on-dark-rule);
    scrollbar-width: none;
}
.supply__tabs [role="tab"] {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: none;
    padding: clamp(8px, 1.5vh, 12px) 0;
    border: 0;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    background: none;
    color: var(--on-dark-muted);
    font: 500 .9375rem var(--sans);
    cursor: pointer;
    transition: color .2s ease, border-color .2s ease;
}
.supply__tabs [role="tab"]:hover { color: var(--on-dark); }
.supply__tabs [role="tab"][aria-selected="true"] {
    color: var(--white);
    border-bottom-color: var(--lustre);
}
.supply__tabs [role="tab"]:focus-visible { outline-offset: -2px; }
.supply__swatch {
    width: 9px; height: 9px;
    border-radius: 50%;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .25);
}

.supply__readout {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 16px 32px;
    padding-top: clamp(12px, 2.4vh, 20px);
}
.supply__readout:focus-visible { outline-offset: 4px; }
.supply__name {
    font-family: var(--serif);
    font-size: 1.6rem;
    line-height: 1.15;
    color: var(--white);
}
.supply__more { display: inline-block; margin-top: 10px; font-size: .875rem; }
.supply__facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 24px;
}
.supply__facts dt { color: var(--on-dark-muted); font-size: .8125rem; }
.supply__facts dd { color: var(--on-dark); font-size: .9375rem; font-variant-numeric: tabular-nums; }

/* Inner page hero --------------------------------------------------------- */

.page-hero {
    position: relative;
    overflow: hidden;
    background: var(--abyss);
}
.page-hero .seismic {
    height: 100%;
    opacity: .7;
    -webkit-mask-image: linear-gradient(to right, transparent 20%, #000 85%);
            mask-image: linear-gradient(to right, transparent 20%, #000 85%);
}
.page-hero__inner {
    position: relative;
    padding-top: clamp(56px, 7vw, 104px);
    padding-bottom: clamp(56px, 7vw, 104px);
}
.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--on-dark-muted);
    font-size: var(--fs-small);
}
.breadcrumb li + li::before {
    content: "/";
    margin-right: 8px;
    color: var(--lustre);
}
.breadcrumb a { color: var(--on-dark-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--on-dark); text-decoration: underline; }
.page-hero__title {
    max-width: 22ch;
    margin-top: 20px;
    font-family: var(--serif);
    font-size: clamp(2.25rem, 1.5rem + 3vw, 4rem);
    font-weight: 300;
    line-height: 1.08;
    letter-spacing: -.01em;
    color: var(--white);
}
.page-hero__lede {
    max-width: 62ch;
    margin-top: 24px;
    color: var(--on-dark-muted);
    font-size: 1.125rem;
}

/* Sections ---------------------------------------------------------------- */

.section { padding-block: var(--section); }
.section--nacre { background: var(--nacre); }

.section-head {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 24px clamp(32px, 5vw, 80px);
    align-items: end;
    margin-bottom: clamp(32px, 4vw, 56px);
}
.section-head h2,
.split__aside h2,
.intro__title {
    font-family: var(--serif);
    font-size: var(--fs-h2);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -.005em;
    color: var(--abyss);
}
.section-head p {
    max-width: 60ch;
    color: var(--slate);
}
.section-foot { margin-top: 32px; }

.split {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 32px clamp(32px, 6vw, 96px);
}
.split__aside p {
    max-width: 38ch;
    margin-top: 18px;
    color: var(--slate);
}
.split__aside .text-link { margin-top: 24px; }
.split__aside .service__code { margin-top: 14px; }

/* Home: intro and disciplines -------------------------------------------- */

.intro {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 24px clamp(32px, 5vw, 80px);
    margin-bottom: clamp(48px, 6vw, 88px);
}
.intro__title { max-width: 18ch; }
.intro__text {
    max-width: 60ch;
    font-family: var(--serif);
    font-size: var(--fs-lead);
    line-height: 1.5;
    color: var(--graphite);
}

.disciplines {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(24px, 4vw, 56px);
}
.discipline {
    display: flex;
    flex-direction: column;
    padding-top: 28px;
    border-top: 1px solid var(--rule-strong);
}
.discipline h3 {
    font-family: var(--serif);
    font-size: var(--fs-h3);
    color: var(--abyss);
}
.discipline p { margin-top: 14px; color: var(--slate); }
.discipline .text-link { margin-top: auto; padding-top: 24px; align-self: flex-start; }

.discipline__code,
.service__code {
    color: var(--slate);
    font-size: .8125rem;
    font-variant-numeric: tabular-nums;
    letter-spacing: .02em;
}

/* Home: product schedule summary ----------------------------------------- */

.schedule-summary { border-bottom: 1px solid var(--rule); }
.schedule-summary__row {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr) auto;
    gap: 8px 32px;
    align-items: baseline;
    padding: 24px 12px;
    margin-inline: -12px;
    border-top: 1px solid var(--rule);
    text-decoration: none;
    transition: background-color .2s ease;
}
.schedule-summary__row:hover { background: var(--white); }
.schedule-summary__family {
    font-family: var(--serif);
    font-size: 1.35rem;
    color: var(--abyss);
}
.schedule-summary__items { color: var(--slate); }
.schedule-summary__count {
    color: var(--slate);
    font-size: var(--fs-small);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* Definition grids -------------------------------------------------------- */

.clients,
.programmes,
.principles {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(24px, 4vw, 56px);
}
.clients > div,
.programmes > div,
.principles > div {
    padding: 24px 0 28px;
    border-top: 1px solid var(--rule);
}
.clients dt {
    font-weight: 600;
    color: var(--abyss);
}
.programmes dt,
.principles dt {
    font-family: var(--serif);
    font-size: var(--fs-h3);
    line-height: 1.25;
    color: var(--abyss);
}
.clients dd,
.programmes dd,
.principles dd {
    max-width: 52ch;
    margin-top: 8px;
    color: var(--slate);
}
.programmes dd,
.principles dd { margin-top: 12px; }

.principles { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.principles > div { border-top-color: var(--rule-strong); }

.definitions > div {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    gap: 8px 32px;
    padding: 20px 0;
    border-top: 1px solid var(--rule);
}
.definitions > div:last-child { border-bottom: 1px solid var(--rule); }
.definitions dt { font-weight: 600; color: var(--abyss); }
.definitions dd { color: var(--slate); }
.prose .definitions { margin-top: 32px; }

/* Checklists -------------------------------------------------------------- */

.checks li {
    position: relative;
    padding: 18px 0 18px 40px;
    border-top: 1px solid var(--rule);
}
.checks li:last-child { border-bottom: 1px solid var(--rule); }
.checks li::before {
    content: "";
    position: absolute;
    left: 2px; top: 23px;
    width: 18px; height: 18px;
    border: 1px solid var(--lustre);
    border-radius: 50%;
    background:
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M5 9.3l2.6 2.5L13 6.4' fill='none' stroke='%2316384A' stroke-width='1.4'/%3E%3C/svg%3E") center / 100% no-repeat;
}
.checks--compact { margin-top: 28px; }
.checks--compact li { padding-block: 13px; }
.checks--compact li::before { top: 16px; }
.checks--warn { margin-block: 24px; }
.checks--warn li::before {
    border-color: var(--error);
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M6 6l6 6M12 6l-6 6' fill='none' stroke='%23A33A2F' stroke-width='1.4'/%3E%3C/svg%3E") center / 100% no-repeat;
}

/* Prose ------------------------------------------------------------------- */

.prose { max-width: 68ch; }
.prose p + p { margin-top: 18px; }
.prose__lead {
    font-family: var(--serif);
    font-size: var(--fs-lead);
    line-height: 1.5;
    color: var(--abyss);
}
.prose p:not(.prose__lead) { color: var(--graphite); }
.prose a { color: var(--petrol); font-weight: 600; text-underline-offset: 4px; }

/* Steps (home) ------------------------------------------------------------ */

.steps {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0 clamp(16px, 2.5vw, 32px);
    counter-reset: step;
}
.step {
    position: relative;
    display: flex;
    flex-direction: column;
    padding-top: 64px;
    counter-increment: step;
}
.step::before {
    content: counter(step);
    position: absolute;
    top: 0; left: 0;
    display: grid;
    place-items: center;
    width: 36px; height: 36px;
    border: 1px solid var(--abyss);
    border-radius: 50%;
    background: var(--nacre);
    font-family: var(--serif);
    font-size: 1.05rem;
    color: var(--abyss);
    z-index: 1;
}
.step::after {
    content: "";
    position: absolute;
    top: 18px; left: 36px; right: calc(-1 * clamp(16px, 2.5vw, 32px));
    height: 1px;
    background: var(--rule-strong);
    opacity: .35;
}
.step:last-child::after { display: none; }
.step h3 {
    font-family: var(--serif);
    font-size: var(--fs-h3);
    color: var(--abyss);
}
.step p { margin-top: 10px; color: var(--slate); font-size: .9375rem; }
.step .step__doc {
    margin-top: auto;
    padding-top: 16px;
    color: var(--petrol);
    font-size: var(--fs-small);
    font-weight: 600;
}

/* Timeline (how we trade) ------------------------------------------------- */

.timeline { counter-reset: tl; }
.timeline__step {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 16px clamp(32px, 5vw, 80px);
    padding: 36px 0 40px 72px;
    border-top: 1px solid var(--rule);
    counter-increment: tl;
}
.timeline__step:last-child { border-bottom: 1px solid var(--rule); }
.timeline__step::before {
    content: counter(tl);
    position: absolute;
    left: 0; top: 34px;
    font-family: var(--serif);
    font-size: 2.25rem;
    font-weight: 300;
    line-height: 1;
    color: var(--lustre);
    font-variant-numeric: lining-nums;
}
.timeline__head h2 {
    font-family: var(--serif);
    font-size: var(--fs-h3);
    color: var(--abyss);
}
.timeline__time { margin-top: 6px; color: var(--slate); font-size: var(--fs-small); }
.timeline__body p:first-child { max-width: 62ch; }
.timeline__doc {
    margin-top: 14px;
    color: var(--petrol);
    font-size: var(--fs-small);
    font-weight: 600;
}

/* Incoterms --------------------------------------------------------------- */

.terms {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0 clamp(16px, 2.5vw, 32px);
}
.terms > div { padding-top: 20px; border-top: 1px solid var(--rule-strong); }
.terms dt {
    font-family: var(--serif);
    font-size: 2.25rem;
    font-weight: 300;
    line-height: 1;
    color: var(--abyss);
}
.terms dd { margin-top: 14px; color: var(--slate); font-size: .9375rem; }
.terms strong { display: block; color: var(--graphite); font-weight: 600; }

/* Tables ------------------------------------------------------------------ */

.table-scroll { overflow-x: auto; }

.spec-table,
.register {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}
.spec-table { min-width: 760px; }
.spec-table thead th,
.register thead th {
    padding: 0 16px 14px 0;
    border-bottom: 1px solid var(--rule-strong);
    color: var(--slate);
    font-size: .8125rem;
    font-weight: 600;
    text-align: left;
    white-space: nowrap;
}
.spec-table td,
.spec-table tbody th,
.register td {
    padding: 18px 16px 18px 0;
    border-bottom: 1px solid var(--rule);
    text-align: left;
    vertical-align: top;
}
.spec-table tbody th {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--abyss);
    white-space: nowrap;
}
.spec-table td { color: var(--graphite); font-size: .9375rem; }
.spec-table td:nth-child(3) { color: var(--slate); }

.register td:last-child { color: var(--slate); white-space: nowrap; }
.register__code {
    width: 96px;
    font-family: var(--serif);
    font-size: 1.35rem;
    color: var(--abyss);
}

/* Product index (sticky) -------------------------------------------------- */

.product-index {
    position: sticky;
    top: var(--header-h);
    z-index: 20;
    background: var(--white);
    border-bottom: 1px solid var(--rule);
}
.product-index ul {
    display: flex;
    gap: 28px;
    overflow-x: auto;
    scrollbar-width: none;
}
.product-index a {
    display: block;
    padding: 16px 0;
    color: var(--slate);
    font-size: .9375rem;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 1px solid transparent;
}
.product-index a:hover,
.product-index a[aria-current] { color: var(--abyss); border-bottom-color: var(--lustre); }
.family h2:focus { outline: none; }

/* Closing call to action -------------------------------------------------- */

.closing {
    position: relative;
    overflow: hidden;
    background: var(--petrol);
}
.closing .seismic {
    color: #7FA0AF;
    opacity: .55;
    -webkit-mask-image: linear-gradient(to left, #000 10%, transparent 75%);
            mask-image: linear-gradient(to left, #000 10%, transparent 75%);
}
.closing__inner {
    position: relative;
    padding-block: clamp(64px, 8vw, 112px);
}
.closing__title {
    max-width: 28ch;
    font-family: var(--serif);
    font-size: var(--fs-h2);
    font-weight: 300;
    line-height: 1.2;
    color: var(--white);
}
.closing__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 32px;
    margin-top: 36px;
}

/* Contact ----------------------------------------------------------------- */

.contact {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px clamp(40px, 6vw, 96px);
    align-items: start;
}
.contact__form > h2,
.notice h2 {
    font-family: var(--serif);
    font-size: var(--fs-h2);
    color: var(--abyss);
}
.form { margin-top: 32px; }
.form__row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 24px;
}
.field { margin-bottom: 24px; }
.field label {
    display: block;
    margin-bottom: 8px;
    font-size: .9375rem;
    font-weight: 600;
    color: var(--graphite);
}
.field__optional { color: var(--slate); font-weight: 400; }
.field__hint { margin: -2px 0 10px; color: var(--slate); font-size: var(--fs-small); }

.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field select,
.field textarea {
    width: 100%;
    min-height: 50px;
    padding: 12px 14px;
    border: 1px solid #8D9CA3;
    border-radius: 2px;
    background: var(--white);
    color: var(--graphite);
    font: 400 1rem/1.5 var(--sans);
    transition: border-color .15s ease;
}
.field textarea { resize: vertical; min-height: 160px; }
.field select {
    appearance: none;
    padding-right: 44px;
    background: var(--white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%231E2A30' stroke-width='1.4'/%3E%3C/svg%3E") right 16px center / 12px no-repeat;
}
.field input:hover,
.field select:hover,
.field textarea:hover { border-color: var(--graphite); }
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
    outline: 2px solid var(--petrol);
    outline-offset: 0;
    border-color: var(--petrol);
}
.field [aria-invalid="true"] { border-color: var(--error); border-width: 2px; }
.field__error {
    margin-top: 8px;
    color: var(--error);
    font-size: var(--fs-small);
    font-weight: 600;
}

.field--check {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 14px;
    align-items: start;
}
.field--check input {
    width: 22px; height: 22px;
    margin: 1px 0 0;
    accent-color: var(--abyss);
}
.field--check label {
    margin: 0;
    font-weight: 400;
    color: var(--slate);
    font-size: .9375rem;
}
.field--check .field__error { grid-column: 2; margin-top: 0; }

.notice {
    padding: 28px 32px;
    border-left: 3px solid;
}
.notice:focus { outline: none; }
.notice--success { border-color: var(--success); background: #EDF4F0; }
.notice--error { border-color: var(--error); background: #FBF0EE; margin-top: 24px; }
.notice--error h3 { font-weight: 600; font-size: 1.0625rem; color: var(--error); }
.notice--error ul { margin-top: 10px; }
.notice--error li + li { margin-top: 4px; }
.notice--error a { color: var(--graphite); }
.notice--success p { margin-top: 12px; }

.contact__details {
    padding: clamp(28px, 3vw, 40px);
    background: var(--nacre);
}
.contact__details h2 {
    font-family: var(--serif);
    font-size: var(--fs-h3);
    color: var(--abyss);
}
.contact__details address { margin-top: 12px; font-style: normal; }
.contact__hours { margin-top: 12px; color: var(--slate); font-size: var(--fs-small); }
.contact__lines { margin-top: 28px; }
.contact__lines > div { padding: 14px 0; border-top: 1px solid var(--rule); }
.contact__lines dt { color: var(--slate); font-size: var(--fs-small); }
.contact__lines dd { margin-top: 2px; overflow-wrap: anywhere; }
.contact__lines a { color: var(--petrol); font-weight: 600; text-decoration: none; }
.contact__lines a:hover { text-decoration: underline; }
.contact__note {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--rule-strong);
    color: var(--slate);
    font-size: var(--fs-small);
}

/* Footer ------------------------------------------------------------------ */

.site-footer {
    background: var(--abyss);
    padding-top: clamp(56px, 7vw, 88px);
    font-size: .9375rem;
}
.site-footer__top {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 48px clamp(32px, 5vw, 80px);
    padding-bottom: 56px;
}
.site-footer__tagline { margin-top: 20px; color: var(--on-dark-muted); }
.site-footer__nav {
    display: grid;
    grid-template-columns: 1fr 1fr 1.2fr 1.4fr;
    gap: 32px;
}
.site-footer__nav h2 {
    margin-bottom: 14px;
    color: var(--on-dark);
    font-size: .9375rem;
    font-weight: 600;
}
.site-footer__nav li + li { margin-top: 8px; }
.site-footer__nav a,
.site-footer address a {
    color: var(--on-dark-muted);
    text-decoration: none;
}
.site-footer__nav a:hover,
.site-footer address a:hover { color: var(--on-dark); text-decoration: underline; }
.site-footer address { font-style: normal; color: var(--on-dark-muted); line-height: 1.7; }
.site-footer__legal {
    padding-block: 24px 32px;
    border-top: 1px solid var(--on-dark-rule);
    color: var(--on-dark-muted);
    font-size: .8125rem;
}
.site-footer__legal p + p { margin-top: 6px; }

/* Responsive -------------------------------------------------------------- */

@media (max-width: 1100px) {
    .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px 24px; }
    .step::after { display: none; }
    .terms { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px 24px; }
    .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .site-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
    .hero__inner { grid-template-columns: 1fr; }
    .hero__facts { grid-template-columns: repeat(2, 1fr); }
    .hero__facts li:nth-child(3) { padding-left: 0; border-left: 0; }
    .hero__facts li:nth-child(n+3) { border-top: 1px solid var(--on-dark-rule); }

    .section-head,
    .intro,
    .split,
    .contact,
    .site-footer__top,
    .timeline__step { grid-template-columns: 1fr; }

    .disciplines { grid-template-columns: 1fr; }
    .schedule-summary__row { grid-template-columns: 1fr auto; }
    .schedule-summary__items { grid-column: 1 / -1; grid-row: 2; }
}

@media (max-width: 640px) {
    :root { --header-h: 68px; }
    body { font-size: 1rem; }
    .brand__name { font-size: 1.25rem; }
    .brand .mark { width: 34px; height: 34px; }
    .brand__logo { max-height: 38px; max-width: 180px; }
    .nav-toggle__label { display: none; }

    .supply__readout { grid-template-columns: 1fr; gap: 12px; }
    .supply__stages { gap: 4px 14px; font-size: .75rem; }
    .supply__bar { align-items: flex-start; }
    .supply__scene { width: calc(100% + 2 * var(--gutter)); max-width: none; margin-inline: calc(-1 * var(--gutter)); }
    .hero__facts { grid-template-columns: 1fr; }
    .hero__facts li,
    .hero__facts li + li { padding: 16px 0; border-left: 0; }
    .hero__facts li + li { border-top: 1px solid var(--on-dark-rule); }

    .clients,
    .programmes,
    .principles,
    .steps,
    .terms,
    .form__row { grid-template-columns: 1fr; }
    .steps { gap: 32px; }
    .definitions > div { grid-template-columns: 1fr; }
    .timeline__step { padding-left: 52px; }
    .timeline__step::before { font-size: 1.85rem; }
    .register thead { display: none; }
    .register tr { display: grid; grid-template-columns: 72px 1fr; padding: 16px 0; border-bottom: 1px solid var(--rule); }
    .register td { padding: 0; border: 0; }
    .register td:last-child { grid-column: 2; margin-top: 6px; font-size: var(--fs-small); }
    .register__code { grid-row: span 2; }
    .site-footer__nav { grid-template-columns: 1fr 1fr; }
    .btn { width: 100%; }
    .site-nav__cta { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-delay: 0s !important;
        transition-duration: .01ms !important;
    }
}

/* reCAPTCHA: the badge is hidden and replaced by the notice under the form, as Google allows */
.grecaptcha-badge { visibility: hidden; }
.form__recaptcha { margin-top: 16px; color: var(--slate); font-size: .8125rem; }