/* Design tokens */
:root {
  --navy: #19385b;
  --ink: #102a49;
  --muted: #65758a;
  --line: #dce4ec;
  --wash: #f5f8fb;
  --accent: #2d6da8;
  --max: 1240px;
  --project-radius: 24px;
}

/* Base styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid #70b8f5;
  outline-offset: 5px;
}

.wrap {
  width: min(var(--max), calc(100% - 64px));
  margin-inline: auto;
}

/* Header and language controls */
.top {
  background: var(--navy);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  min-height: 86px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: flex;
  flex-shrink: 0;
  margin-right: auto;
}

.brand img {
  display: block;
  width: 205px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
}

.nav-links a:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-left: 24px;
  border-left: 1px solid #ffffff55;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.lang-switch button {
  appearance: none;
  border: 0;
  background: transparent;
  color: #ffffffb8;
  font: inherit;
  letter-spacing: inherit;
  padding: 8px 4px;
  cursor: pointer;
}

.lang-switch button:hover,
.lang-switch button.active {
  color: #fff;
}

.lang-switch span {
  color: #ffffff55;
}

/* A compact introduction to the whole portfolio */
.intro {
  padding-block: 64px 48px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.intro h1 {
  max-width: 920px;
  margin: 0 0 22px;
  font-size: clamp(36px, 4.5vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.lead {
  max-width: 780px;
  margin: 0;
  color: var(--muted);
  font-size: 19px;
}

.intro-cta {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 20px;
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  font-weight: 600;
}

.intro-cta:hover {
  background: var(--ink);
}

/* Shared section layout */
.section {
  padding-block: 80px;
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 40px;
  margin-bottom: 36px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

/* All projects use this one card component, including Minerva. */
.projects-section {
  padding-block: 48px 80px;
  border-top: 1px solid var(--line);
  background: var(--wash);
}

.project-groups {
  display: grid;
  gap: 48px;
}

.project-group-title {
  margin: 0 0 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  font-size: clamp(22px, 2.5vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.025em;
}

.project-group-description {
  max-width: 780px;
  margin: 0 0 24px;
  color: var(--muted);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.project-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 32px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--project-radius);
}

.project-heading {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  align-items: center;
  gap: 22px;
  margin-bottom: 24px;
}

.project-icon {
  width: 80px;
  height: 80px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 18px;
  background: var(--navy);
}

.project-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.project-icon .project-symbol {
  width: 44px;
  height: 44px;
}

.project-category {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-heading h3 {
  margin: 0;
  font-size: clamp(25px, 2.5vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.035em;
  overflow-wrap: anywhere;
}

.project-summary {
  flex: 1;
  margin: 0 0 24px;
  color: var(--muted);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 8px;
  min-height: 64px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.project-tags li {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 11px;
  color: var(--ink);
}

/* Native details work with the keyboard and without JavaScript. */
.project-details {
  border-top: 1px solid var(--line);
}

.project-details summary {
  padding-block: 16px 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 650;
}

.project-details summary::marker {
  color: var(--accent);
}

.project-detail-body {
  padding-top: 8px;
  font-size: 14px;
  color: var(--muted);
}

.project-detail-body p {
  margin: 16px 0;
}

/* Full project images stay visible without cropping when details are opened. */
.project-media {
  margin: 16px 0 24px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--wash);
}

.project-media img {
  display: block;
  width: 100%;
  height: auto;
}

.capabilities {
  margin: 24px 0 0;
}

.capabilities > div {
  padding-block: 12px;
  border-top: 1px solid var(--line);
}

.capabilities dt {
  color: var(--ink);
  font-weight: 650;
}

.capabilities dd {
  margin: 4px 0 0;
}

/* Example workflows within a project's expanded details. */
.project-workflow {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.project-workflow h4 {
  margin: 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.4;
}

.workflow-steps {
  margin: 20px 0 0;
  padding-left: 24px;
}

.workflow-steps li {
  padding-left: 8px;
}

.workflow-steps li + li {
  margin-top: 18px;
}

.workflow-steps li::marker {
  color: var(--accent);
  font-weight: 700;
}

.workflow-steps strong,
.workflow-steps span {
  display: block;
}

.workflow-steps strong {
  margin-bottom: 4px;
  color: var(--ink);
}

/* Engineering expertise */
.services {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.service {
  padding: 28px 24px 0;
}

.service + .service {
  border-left: 1px solid var(--line);
}

.num {
  margin-bottom: 24px;
  color: var(--accent);
  font-size: 24px;
}

.service h3 {
  margin: 0 0 12px;
  font-size: 20px;
  line-height: 1.3;
}

.service p,
.tags {
  color: var(--muted);
  font-size: 14px;
}

.service p {
  margin: 0;
}

.tags {
  margin-top: 20px;
  font-size: 11px;
}

/* About and company details */
.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.statement {
  margin: 0;
  font-size: clamp(30px, 3.5vw, 46px);
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.about-copy p {
  margin: 0 0 24px;
  color: var(--muted);
}

.fact {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-block: 16px;
  font-size: 14px;
}

.fact span:first-child {
  color: var(--muted);
}

/* Contact and footer */
.contact,
.footer {
  background: var(--navy);
  color: #fff;
}

.contact .eyebrow {
  color: #bcd4eb;
}

.contact h2 {
  margin: 0 0 28px;
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.contact p {
  color: #d7e0e9;
}

.mail {
  border-bottom: 1px solid currentColor;
  overflow-wrap: anywhere;
}

.details div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 16px;
  padding-block: 18px;
  border-top: 1px solid #ffffff35;
  font-size: 14px;
}

.details span:first-child {
  color: #b8c6d5;
}

.footer {
  border-top: 1px solid #ffffff25;
  padding-block: 24px;
  color: #b8c6d5;
  font-size: 12px;
}

.footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

/* Tablet */
@media (max-width: 980px) {
  .nav {
    gap: 22px;
  }

  .nav-links {
    gap: 18px;
  }

  .project-card {
    padding: 24px;
  }

  .services {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 0;
  }

  .service:nth-child(3) {
    border-left: 0;
  }
}

/* Mobile: all navigation and all projects remain accessible. */
@media (max-width: 800px) {
  html {
    scroll-padding-top: 150px;
  }

  .wrap {
    width: calc(100% - 36px);
  }

  .nav {
    flex-wrap: wrap;
    gap: 12px;
    padding-block: 14px;
  }

  .brand img {
    width: 170px;
  }

  .lang-switch {
    padding-left: 12px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
  }

  .intro {
    padding-block: 40px 32px;
  }

  .lead {
    font-size: 17px;
  }

  .projects-section,
  .section {
    padding-block: 40px;
  }

  .projects-grid,
  .section-head,
  .about-grid,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .project-heading {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 16px;
  }

  .project-icon {
    width: 64px;
    height: 64px;
    border-radius: 14px;
  }

  .project-icon .project-symbol {
    width: 36px;
    height: 36px;
  }

  .project-tags {
    min-height: 0;
  }

  .services {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .service {
    padding: 24px 0;
  }

  .service + .service {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .fact {
    grid-template-columns: 110px minmax(0, 1fr);
  }

  .footer .wrap {
    flex-direction: column;
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}