/* Vessel Keeper marketing site.
   Chartroom meets design magazine: midnight hero, warm-white shell, jade accents, fine rules.
   The only gradient is the hero legibility overlay. No JavaScript is required. */

:root {
  --ink: #10283b;
  --navy: #0b2234;
  --teal: #10695e;
  --paper: #f8f7f2;
  --line: #d5dfdc;
  --seafoam: #a8dccd;
  --mist: #eef2ee;
  --muted: #4a6070;
  --white: #fff;
  --rule-dark: rgba(255, 255, 255, .16);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shell: 1180px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --space: clamp(4rem, 9vw, 7.5rem);
  --overlap: clamp(2rem, 7vw, 6rem);
  --bar: 2.25rem;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 1.0625rem/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 600; line-height: 1.12; letter-spacing: -.012em; text-wrap: balance; }
h1 { font-size: clamp(2.75rem, 6vw, 4.75rem); line-height: 1.03; letter-spacing: -.02em; }
h2 { font-size: clamp(2rem, 3.8vw, 3rem); }
h3 { font-size: 1.5rem; }
p { margin: 0; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--focus, var(--teal)); outline-offset: 3px; }

/* Dark surfaces re-point accent, button and focus colours through custom properties. */
.mk-header, .mk-hero, .mk-page-head, .mk-cta, .mk-footer {
  background: var(--navy);
  color: var(--white);
  --accent: var(--seafoam);
  --soft: #c3d2d6;
  --focus: var(--seafoam);
  --btn-bg: var(--seafoam);
  --btn-fg: var(--navy);
  --btn-hover: var(--white);
  --btn-hover-fg: var(--navy);
}

.mk-shell { width: min(100% - 2 * var(--gutter), var(--shell)); margin-inline: auto; }
.mk-skip { position: absolute; top: -5rem; left: 1rem; z-index: 100; padding: .75rem 1rem; background: var(--white); color: var(--ink); font-weight: 600; }
.mk-skip:focus { top: 1rem; }

/* ---------- Header ---------- */
.mk-header { position: relative; z-index: 10; border-bottom: 1px solid var(--rule-dark); }
.mk-nav { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 2rem; min-height: 4.5rem; padding-block: .75rem; }
.mk-brand { display: inline-flex; align-items: center; gap: .6rem; margin-right: auto; font: 600 1.3125rem/1 var(--serif); letter-spacing: .01em; text-decoration: none; }
.mk-brand img, .mk-brand svg { width: 1.75rem; height: 1.75rem; }
.mk-nav-links, .mk-nav-links ul { display: flex; flex-wrap: wrap; gap: .25rem 1.75rem; margin: 0; padding: 0; list-style: none; }
.mk-nav-links a, .mk-nav-actions a:not(.mk-button) { padding: .5rem 0; color: var(--soft); font-size: .9375rem; font-weight: 500; text-decoration: none; transition: color .18s ease; }
.mk-nav-links a:hover, .mk-nav-links a[aria-current="page"], .mk-nav-actions a:not(.mk-button):hover { color: var(--white); }
.mk-nav-links a[aria-current="page"] { box-shadow: inset 0 -1px var(--seafoam); }
.mk-nav-actions { display: flex; align-items: center; gap: 1.25rem; }
.mk-nav-actions .mk-button { min-height: 2.5rem; padding: .5rem 1rem; }

/* ---------- Buttons, links, labels ---------- */
.mk-button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 3rem; padding: .75rem 1.4rem;
  border: 1px solid transparent; border-radius: 2px;
  font: 600 .9375rem/1.2 var(--sans); letter-spacing: .01em; text-decoration: none; white-space: nowrap; cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease;
}
.mk-button--primary { background: var(--btn-bg, var(--teal)); color: var(--btn-fg, var(--white)); }
.mk-button--outline { border-color: currentColor; background: transparent; color: inherit; }
.mk-button--primary:hover, .mk-button--outline:hover { border-color: var(--btn-hover, var(--ink)); background: var(--btn-hover, var(--ink)); color: var(--btn-hover-fg, var(--white)); }

.mk-link { display: inline-flex; gap: .45em; color: var(--accent, var(--teal)); font-size: .9375rem; font-weight: 600; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .3em; }
.mk-link:hover { color: var(--soft, var(--ink)); }
.mk-link span { transition: transform .18s ease; }
.mk-link:hover span { transform: translateX(3px); }

.mk-kicker, .mk-row-tag, .mk-feature-no { color: var(--accent, var(--teal)); font: 600 .75rem/1.4 var(--sans); letter-spacing: .16em; text-transform: uppercase; }
.mk-kicker { display: flex; align-items: center; gap: .75rem; margin-bottom: 1.25rem; }
.mk-kicker::before { content: ""; flex: none; width: 1.75rem; height: 1px; background: currentColor; }
.mk-lede { max-width: 32rem; margin-top: 1.5rem; color: var(--soft, var(--muted)); font-size: clamp(1.0625rem, 1.5vw, 1.25rem); line-height: 1.55; }
.mk-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2.25rem; }
.mk-tag { display: inline-block; padding: .2rem .55rem; border: 1px solid currentColor; border-radius: 2px; color: var(--teal); font: 600 .6875rem/1.4 var(--sans); letter-spacing: .12em; text-transform: uppercase; }

/* ---------- Hero ---------- */
.mk-hero { position: relative; overflow: hidden; }
.mk-hero-inner { position: relative; z-index: 1; display: flex; align-items: center; min-height: clamp(34rem, 80vh, 47rem); padding-block: clamp(4rem, 9vw, 7rem) calc(clamp(4rem, 9vw, 7rem) + var(--overlap)); }
.mk-hero-copy { max-width: 45rem; }
.mk-hero-note { margin-top: 1.5rem; color: var(--soft); font-size: .875rem; }
.mk-hero-media { position: absolute; inset: 0; }
.mk-hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 78% 40%; }
.mk-hero-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--navy) 0%, rgba(11, 34, 52, .94) 34%, rgba(11, 34, 52, .7) 58%, rgba(11, 34, 52, 0) 90%); }

/* ---------- Screenshot frame (fine browser-like chrome) ---------- */
.mk-proof { position: relative; z-index: 2; margin-top: calc(var(--overlap) * -1); }
.mk-frame { margin: 0; }
.mk-frame-window { position: relative; padding-top: var(--bar); overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--white); box-shadow: 0 1px 2px rgba(11, 34, 52, .06), 0 28px 60px -32px rgba(11, 34, 52, .45); }
.mk-frame-window::before { content: ""; position: absolute; top: calc((var(--bar) - .5rem) / 2); left: .9rem; width: .5rem; height: .5rem; border-radius: 50%; background: var(--line); box-shadow: .85rem 0 var(--line), 1.7rem 0 var(--line); }
.mk-frame-window::after { content: ""; position: absolute; top: calc((var(--bar) - 1rem) / 2); left: 50%; width: min(40%, 18rem); height: 1rem; transform: translateX(-50%); border: 1px solid var(--line); border-radius: 99px; }
.mk-frame-window img { width: 100%; border-top: 1px solid var(--line); }
.mk-frame figcaption { margin-top: .9rem; color: var(--muted); font-size: .8125rem; letter-spacing: .02em; }

/* ---------- Sections ---------- */
.mk-section, .mk-index { padding-block: var(--space); }
.mk-section--tint { border-block: 1px solid var(--line); background: var(--mist); }
.mk-section--ruled { border-top: 1px solid var(--line); }
.mk-section-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 1.5rem 3rem; align-items: end; margin-bottom: clamp(2.5rem, 5vw, 4rem); padding-bottom: 2rem; border-bottom: 1px solid var(--ink); }
.mk-section-head h2 { max-width: 18ch; }
.mk-section-head p:not(.mk-kicker) { color: var(--muted); }
.mk-section-head .mk-link { margin-top: 1rem; }
.mk-split { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 2.5rem clamp(2rem, 6vw, 5rem); align-items: start; }
.mk-split-head p:not(.mk-kicker) { margin-top: 1.25rem; color: var(--muted); }

/* ---------- Features (homepage) ---------- */
.mk-features { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(3rem, 6vw, 5rem) clamp(2rem, 5vw, 4rem); }
.mk-feature { padding-top: 1.75rem; border-top: 1px solid var(--line); }
.mk-feature--lead { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; padding-top: 0; border-top: 0; }
.mk-feature--lead:nth-child(even) { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.mk-feature--lead:nth-child(even) .mk-feature-copy { order: 2; }
.mk-feature-no { margin-bottom: 1rem; }
.mk-feature-no span { margin-right: .75rem; color: var(--muted); font-weight: 500; }
.mk-feature h3 { font-size: 1.625rem; }
.mk-feature--lead h3 { font-size: clamp(1.75rem, 3vw, 2.375rem); }
.mk-feature-copy > p:not(.mk-feature-no) { margin-top: 1rem; color: var(--muted); }
.mk-feature .mk-link { margin-top: 1.75rem; }
.mk-ticks { display: grid; gap: .55rem; margin: 1.5rem 0 0; padding: 0; list-style: none; font-size: .9375rem; font-weight: 500; }
.mk-ticks li { display: flex; align-items: baseline; gap: .75rem; }
.mk-ticks li::before { content: ""; flex: none; width: .75rem; height: 1px; background: var(--teal); transform: translateY(-.3em); }

/* ---------- Workflow rows, quotes, FAQ ---------- */
.mk-rows { margin: 0; padding: 0; list-style: none; }
.mk-row { display: grid; grid-template-columns: 11rem minmax(0, 5fr) minmax(0, 6fr); gap: 1rem 2.5rem; padding-block: 2rem; border-top: 1px solid var(--line); }
.mk-row:first-child { padding-top: 0; border-top: 0; }
.mk-row:last-child { padding-bottom: 0; }
.mk-row-tag { padding-top: .5rem; }
.mk-row p:not(.mk-row-tag) { color: var(--muted); }
.mk-row .mk-link { margin-top: 1rem; }

.mk-quotes { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); gap: 2.5rem clamp(2rem, 4vw, 3.5rem); }
.mk-quote { margin: 0; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.mk-quote blockquote { margin: 1.25rem 0 0; font: 400 1.3125rem/1.45 var(--serif); }
.mk-quote figcaption { margin-top: 1.25rem; color: var(--muted); font-size: .875rem; }

.mk-faq { border-top: 1px solid var(--ink); }
.mk-faq details { border-bottom: 1px solid var(--line); }
.mk-faq summary { display: flex; justify-content: space-between; align-items: baseline; gap: 1.5rem; padding: 1.35rem 0; cursor: pointer; list-style: none; }
.mk-faq summary::-webkit-details-marker { display: none; }
.mk-faq summary h3 { font-size: 1.3125rem; line-height: 1.3; transition: color .18s ease; }
.mk-faq summary:hover h3 { color: var(--teal); }
.mk-faq summary::after { content: "+"; flex: none; color: var(--teal); font: 400 1.5rem/1 var(--sans); transition: transform .2s ease; }
.mk-faq details[open] summary::after { transform: rotate(45deg); }
.mk-faq-answer { max-width: 44rem; padding: 0 3rem 1.6rem 0; color: var(--muted); }

/* ---------- Feature detail and index pages ---------- */
.mk-page-head { padding-block: clamp(1.75rem, 4vw, 2.75rem) clamp(3.5rem, 7vw, 5.5rem); }
.mk-page-head--figure { padding-bottom: calc(clamp(3.5rem, 7vw, 5.5rem) + var(--overlap)); }
.mk-page-head h1 { max-width: 18ch; font-size: clamp(2.5rem, 5.2vw, 4.25rem); }
.mk-crumbs ol { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 clamp(2.5rem, 5vw, 4rem); padding: 0; list-style: none; color: var(--soft); font-size: .8125rem; }
.mk-crumbs li + li::before { content: "/"; margin-right: .5rem; opacity: .6; }
.mk-crumbs a { text-underline-offset: .25em; }
.mk-crumbs a:hover, .mk-crumbs [aria-current] { color: var(--white); }

.mk-points { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(2rem, 4vw, 3.5rem); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.mk-points li { padding-block: 1.6rem; border-bottom: 1px solid var(--line); }
.mk-points h3 { font-size: 1.3125rem; }
.mk-points p { margin-top: .6rem; color: var(--muted); }
.mk-steps { counter-reset: step; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.mk-steps li { counter-increment: step; display: grid; grid-template-columns: 3.5rem minmax(0, 1fr); align-items: baseline; padding-block: 1.25rem; border-bottom: 1px solid var(--line); }
.mk-steps li::before { content: counter(step, decimal-leading-zero); color: var(--teal); font: 600 1.125rem/1 var(--serif); }

.mk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr)); gap: 1.5rem; }
.mk-card { position: relative; display: flex; flex-direction: column; align-items: flex-start; gap: .75rem; padding: 1.75rem; border: 1px solid var(--line); border-top: 2px solid var(--ink); background: var(--white); color: inherit; text-decoration: none; transition: border-color .18s ease; }
.mk-card:hover, .mk-card:focus-within { border-color: var(--teal); }
.mk-card .mk-kicker { margin-bottom: 0; }
.mk-card :is(h2, h3) { font-size: 1.5rem; }
.mk-card :is(h2, h3) a { text-decoration: none; }
.mk-card :is(h2, h3) a::after { content: ""; position: absolute; inset: 0; }
.mk-card p:not(.mk-kicker) { color: var(--muted); font-size: .9375rem; }
.mk-card-arrow { margin-top: auto; padding-top: .5rem; color: var(--teal); font-size: 1.25rem; line-height: 1; transition: transform .18s ease; }
.mk-card:hover .mk-card-arrow { transform: translateX(4px); }

/* ---------- Closing call and footer ---------- */
.mk-cta { padding-block: var(--space); }
.mk-cta-inner { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 2rem 4rem; align-items: end; }
.mk-cta h2 { max-width: 16ch; }
.mk-cta p:not(.mk-kicker) { max-width: 36rem; margin-top: 1.25rem; color: var(--soft); }
.mk-cta .mk-actions { justify-content: flex-end; margin-top: 0; }

.mk-footer { border-top: 1px solid var(--rule-dark); color: var(--soft); font-size: .875rem; }
.mk-footer > .mk-footer-inner:not(.mk-shell) { width: min(100% - 2 * var(--gutter), var(--shell)); margin-inline: auto; }
.mk-footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem 2rem; padding-block: 2rem; }
.mk-footer ul { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; margin: 0; padding: 0; list-style: none; }
.mk-footer a { text-underline-offset: .25em; }
.mk-footer a:hover { color: var(--white); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  /* Hero stacks: photo as a banner above the copy so both are in view. */
  .mk-hero { display: flex; flex-direction: column; }
  .mk-hero-media { position: static; order: -1; }
  .mk-hero-media img { height: auto; max-height: 22rem; aspect-ratio: 16 / 10; object-position: 82% 50%; }
  .mk-hero-media::after { display: none; }
  .mk-hero-inner { min-height: 0; padding-block: 2.75rem calc(3rem + var(--overlap)); }

  .mk-section-head, .mk-split, .mk-cta-inner, .mk-feature--lead, .mk-feature--lead:nth-child(even) { grid-template-columns: minmax(0, 1fr); }
  .mk-section-head { align-items: start; }
  .mk-feature--lead:nth-child(even) .mk-feature-copy { order: 0; }
  .mk-cta .mk-actions { justify-content: flex-start; }
  .mk-row { grid-template-columns: minmax(0, 1fr); gap: .6rem; }
  .mk-row-tag { padding-top: 0; }
}

@media (max-width: 720px) {
  :root { --bar: 1.5rem; }
  .mk-nav { gap: .5rem .75rem; min-height: 0; }
  .mk-brand { font-size: 1.125rem; }
  .mk-nav-links { order: 3; flex-basis: 100%; gap: .25rem 1.25rem; padding-top: .5rem; border-top: 1px solid var(--rule-dark); }
  .mk-nav-links a { font-size: .875rem; }
  .mk-nav-actions { gap: .85rem; }
  .mk-nav-actions a:not(.mk-button) { font-size: .875rem; }
  .mk-nav-actions .mk-button { padding: .45rem .75rem; font-size: .8125rem; }

  .mk-features, .mk-points { grid-template-columns: minmax(0, 1fr); }
  .mk-frame-window { border-radius: 6px; }
  .mk-frame-window::before { left: .65rem; width: .375rem; height: .375rem; top: calc((var(--bar) - .375rem) / 2); box-shadow: .65rem 0 var(--line), 1.3rem 0 var(--line); }
  .mk-frame-window::after { display: none; }
  .mk-faq-answer { padding-right: 0; }
  .mk-actions .mk-button { flex: 1 1 11rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

.vk-chart-rail {
    --vk-rule: rgba(11, 34, 52, .18);
    background: var(--paper);
    color: var(--navy);
    padding-block: 2rem 1.5rem;
    border-bottom: 1px solid var(--vk-rule);
}
.vk-chart-rail__eyebrow {
    margin: 0 0 1.25rem;
    color: var(--teal);
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
}
.vk-chart-rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 1.5rem;
}
.vk-chart-rail__item { border-top: 1px solid var(--vk-rule); }
.vk-chart-rail__link {
    position: relative;
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas: "label arrow" "benefit benefit";
    gap: .5rem .75rem;
    padding: .9rem 0 1rem;
    color: inherit;
    text-decoration: none;
}
.vk-chart-rail__link::before {
    content: "";
    position: absolute;
    inset: -1px auto auto 0;
    width: 1.5rem;
    height: 2px;
    background: var(--teal);
    transition: width 220ms ease;
}
.vk-chart-rail__label { grid-area: label; font-size: 1.0625rem; font-weight: 670; line-height: 1.3; }
.vk-chart-rail__benefit { grid-area: benefit; font-size: .92rem; line-height: 1.5; color: var(--muted); }
.vk-chart-rail__arrow { grid-area: arrow; align-self: start; color: var(--teal); transition: transform 220ms ease; }
.vk-chart-rail__link:is(:hover, :focus-visible)::before { width: 100%; }
.vk-chart-rail__link:is(:hover, :focus-visible) .vk-chart-rail__label { color: var(--teal); }
.vk-chart-rail__link:is(:hover, :focus-visible) .vk-chart-rail__arrow { transform: translateX(.25rem); }
.vk-chart-rail__link:focus-visible { outline: 2px solid var(--teal); outline-offset: 4px; border-radius: 2px; }
@media (min-width: 64rem) { .vk-chart-rail__list { grid-template-columns: repeat(4, minmax(0, 1fr)); column-gap: 2rem; } }
@media (prefers-reduced-motion: reduce) { .vk-chart-rail__link::before, .vk-chart-rail__arrow { transition: none; } }
.mk-brand-dot { color: #dbb477; }
.mk-nav-links a[aria-current="true"] { color: var(--white); box-shadow: inset 0 -1px var(--seafoam); }
.mk-footer nav { display: flex; flex-wrap: wrap; gap: .6rem 1.15rem; }
.mk-footer .mk-brand { color: var(--white); margin: 0 0 .5rem; }
.mk-copyright { flex-basis: 100%; border-top: 1px solid var(--rule-dark); padding-top: 1rem; }
.mk-index h1 { max-width: 19ch; }
.mk-index .mk-lede { max-width: 60ch; }
.mk-breadcrumb { display: flex; flex-wrap: wrap; gap: .6rem; color: var(--muted); font-size: .875rem; margin: 0 0 1.75rem; }
.mk-feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 3rem; }
.mk-feature-grid .mk-card { padding: 0; }
.mk-card-image { display: block; width: 100%; overflow: hidden; border-bottom: 1px solid var(--line); }
.mk-card-image img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; }
.mk-card-copy { padding: clamp(1rem, 3vw, 2rem); }
.mk-card-copy h2 { margin: .8rem 0 .65rem; font-size: clamp(1.45rem, 3vw, 2rem); }
.mk-card-copy .mk-link { margin-top: 1.25rem; }
.mk-privacy > p { max-width: 65ch; margin-top: 1.25rem; }
.mk-proof + .vk-chart-rail { margin-top: clamp(2rem, 5vw, 4rem); }
.mk-hero h1 { text-wrap: initial; }
.mk-hero h1 em { display: block; color: #c9e7df; font-weight: 500; }
@media (max-width: 44rem) {
    .mk-feature-grid { grid-template-columns: minmax(0, 1fr); }
    .mk-footer nav { gap: .6rem .85rem; }
    .mk-nav-actions .mk-button { min-height: 2.75rem; }
    .mk-hero-media img { aspect-ratio: 16 / 9; }
    .mk-hero-inner { padding-top: 2rem; }
    .mk-hero .mk-actions { margin-top: 1.5rem; }
    .mk-hero .mk-actions .mk-button { flex-basis: 9rem; padding-inline: .75rem; }
}
@media (max-width: 24rem) {
    .mk-nav .mk-brand { gap: .35rem; font-size: 1rem; }
    .mk-nav .mk-brand img { width: 1.4rem; height: 1.4rem; }
    .mk-nav-actions { gap: .6rem; }
    .vk-chart-rail__list { column-gap: 1rem; }
}