/* OptimCyb – static site stylesheet (no external resources) */
:root {
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --accent: #bf0000;
  --accent-dark: #8f0000;
  --text: #1f2328;
  --muted: #59636e;
  --bg: #ffffff;
  --bg-alt: #f4f5f7;
  --dark: #16191d;
  --border: #e1e4e8;
  --radius: 8px;
  --wrap: 1180px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-dark); }
a:hover { color: var(--accent); }
h1, h2, h3, h4, h5 { line-height: 1.25; margin: 1.6em 0 .6em; overflow-wrap: anywhere; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); margin-top: 0; }
h2 { font-size: clamp(1.45rem, 3vw, 1.9rem); }
h3 { font-size: 1.25rem; }
figure { margin: 0; }
blockquote {
  margin: 1.5em 0;
  padding: .5em 1.25em;
  border-left: 4px solid var(--accent);
  background: var(--bg-alt);
}
blockquote cite { font-style: italic; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--dark); color: #fff; padding: .5em 1em; z-index: 100;
}
.skip-link:focus { left: 0; }

.btn {
  display: inline-block;
  padding: .7em 1.6em;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}
.btn:hover, .btn:focus { background: var(--accent-dark); color: #fff; }

/* ---------- header ---------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: .5rem 1.5rem; min-height: 72px;
}
.brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; color: var(--text); }
.brand .logo { width: 56px; height: auto; }
.site-title { display: block; font-size: 1.35rem; font-weight: 800; color: var(--accent); }
.site-description { display: block; font-size: .85rem; color: var(--muted); }

.menu-toggle { position: absolute; opacity: 0; pointer-events: none; }
.menu-button { display: none; }

.main-nav ul { list-style: none; margin: 0; padding: 0; }
.main-nav > ul { display: flex; gap: .25rem; }
.main-nav li { position: relative; }
.main-nav a {
  display: block; padding: .6em .9em;
  color: var(--text); text-decoration: none; font-weight: 600;
  border-radius: var(--radius);
}
.main-nav a:hover, .main-nav a:focus, .main-nav a[aria-current="page"] { color: var(--accent); }
.main-nav li ul {
  display: none;
  position: absolute; top: 100%; left: 0; min-width: 240px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .08); padding: .4rem 0;
}
.main-nav li ul a { font-weight: 500; border-radius: 0; }
.main-nav li:hover > ul, .main-nav li:focus-within > ul { display: block; }

@media (max-width: 860px) {
  .menu-button {
    display: inline-block; cursor: pointer;
    padding: .45em 1em; border: 1px solid var(--border); border-radius: var(--radius); font-weight: 600;
  }
  .menu-toggle:focus-visible + .menu-button { outline: 2px solid var(--accent); }
  .main-nav { display: none; width: 100%; padding-bottom: .75rem; }
  .menu-toggle:checked ~ .main-nav { display: block; }
  .main-nav > ul { flex-direction: column; }
  .main-nav li ul { display: block; position: static; border: 0; box-shadow: none; padding: 0 0 0 1rem; }
  .brand .logo { width: 44px; }
  .site-description { display: none; }
}

/* ---------- homepage ---------- */
.hero {
  color: #fff; padding: clamp(4rem, 12vw, 9rem) 0;
  background: #222 center / cover no-repeat;
}
.hero-server { background-image: linear-gradient(rgba(0,0,0,.55), rgba(0,0,0,.55)), url(../img/hero-server.jpg); }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); margin: .2em 0 .4em; }
.hero p { max-width: 640px; font-size: 1.15rem; }
.hero .kicker { text-transform: uppercase; letter-spacing: .08em; font-weight: 700; font-size: .95rem; color: #ffd5d6; }

.band { padding: clamp(3rem, 7vw, 5rem) 0; }
.band-alt { background: var(--bg-alt); }
.band-dark { color: #fff; background: var(--dark) center / cover no-repeat; }
.band-dark a { color: #fff; }
.hero-research { background-image: linear-gradient(rgba(0,0,0,.65), rgba(0,0,0,.65)), url(../img/hero-research.jpg); }
.hero-research h2 { margin-top: 0; }
.hero-research p { max-width: 760px; }
.vision { background-image: linear-gradient(rgba(0,0,0,.7), rgba(0,0,0,.7)), url(../img/corridor.jpg); }

.section-title { margin-top: 0; text-align: center; }
.section-title::after {
  content: ""; display: block; width: 56px; height: 3px; background: var(--accent); margin: .5em auto 0;
}
.lead { text-align: center; max-width: 760px; margin: 0 auto 2.5rem; color: var(--muted); }
.band-dark .lead { color: #ddd; }
.content .lead { text-align: left; margin-left: 0; }

.cards { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr)); }
.cards-4 { grid-template-columns: repeat(auto-fill, minmax(min(230px, 100%), 1fr)); }
.cards-2 { grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr)); }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
}
.card h3 { font-size: 1.15rem; margin: 1rem 1.1rem .4rem; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a:hover { color: var(--accent); }
.card p { margin: 0 1.1rem 1.2rem; color: var(--muted); font-size: .95rem; }
.card-img img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: var(--bg-alt); }
.card-text { border-top: 4px solid var(--accent); }

.quotes { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); }
.quote { background: rgba(255,255,255,.08); border-radius: var(--radius); padding: 1.5rem; }
.quote blockquote { margin: 0 0 1.2rem; padding: 0; border: 0; background: none; font-size: 1.15rem; font-style: italic; }
.quote figcaption { display: flex; align-items: center; gap: .9rem; }
.quote figcaption img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; }
.quote small { color: #ccc; }

.logo-links, .logo-wall { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; align-items: center; }
.logo-links img { max-height: 90px; width: auto; }
.logo-wall { margin-bottom: 2rem; }
.logo-wall img { max-height: 80px; width: auto; }

.tiles { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(240px, 100%), 1fr)); }
.tile { position: relative; border-radius: var(--radius); overflow: hidden; background: #fff; }
.tile img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.tile figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: .6rem .9rem;
  color: #fff; font-weight: 700; background: linear-gradient(transparent, rgba(0,0,0,.75));
}

.banner { position: relative; display: block; border-radius: var(--radius); overflow: hidden; }
.banner img { width: 100%; }
.banner span {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: clamp(1.6rem, 5vw, 3rem); font-weight: 800; color: #fff; background: rgba(0,0,0,.35);
}
.banner:hover span { background: rgba(191,0,0,.6); }

/* ---------- content pages ---------- */
.content { padding-top: 2.5rem; padding-bottom: 3.5rem; max-width: 960px; }
.content .cards { margin-top: 1.5rem; }
.crumbs { margin: 0 0 .4rem; font-size: .9rem; text-transform: uppercase; letter-spacing: .05em; }
.crumbs a { text-decoration: none; }

.media-text { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; margin: 1.5rem 0; }
.media-text .media img { border-radius: var(--radius); }
.media-text.media-right .media { order: 2; }
.media-body > :first-child { margin-top: 0; }
@media (max-width: 700px) {
  .media-text { grid-template-columns: 1fr; gap: 1rem; }
  .media-text.media-right .media { order: 0; }
}

.columns { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); align-items: center; margin: 1.5rem 0; }
.column { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: center; justify-content: center; }
.column img { max-height: 100px; width: auto; }

.cta { text-align: center; margin: 3rem 0 0; padding: 2rem 1rem; background: var(--bg-alt); border-radius: var(--radius); }
.cta h2 { margin-top: 0; }

/* ---------- footer ---------- */
.site-footer { background: var(--dark); color: #cfd3d8; font-size: .95rem; padding-top: 3rem; }
.site-footer a { color: #fff; }
.site-footer h2 { font-size: 1.1rem; color: #fff; margin: 0 0 1rem; }
.footer-grid { display: grid; gap: 2rem; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); }
.footer-grid img { border-radius: 4px; max-width: 220px; }
.copyright { text-align: center; margin: 2.5rem 0 0; padding: 1.2rem 16px; border-top: 1px solid #2c3137; font-size: .85rem; }


h1, h2, h3, h4, h5, .site-title, .main-nav a, .menu-button, .btn, .banner span {
  font-weight: 700;
  letter-spacing: -.01em;
}

/* ---------- navigation: dropdown parents are labels, Contact is a button ---------- */
.main-nav li > span {
  display: block; padding: .6em .9em; border-radius: var(--radius);
  font-weight: 700; cursor: default;
}
.main-nav .has-sub > span::after { content: "\25BE"; margin-left: .35em; font-size: .75em; }
.main-nav li > span:hover, .main-nav li > span:focus-visible { color: var(--accent); }
.main-nav li.active > a:not(.nav-cta), .main-nav li.active > span { color: var(--accent); }
.main-nav a.nav-cta { background: var(--accent); margin-left: .5rem; padding: .5em 1.3em; border-radius: 999px; }
.main-nav a.nav-cta, .main-nav a.nav-cta[aria-current="page"] { color: #fff; }
.main-nav a.nav-cta:hover, .main-nav a.nav-cta:focus { background: var(--accent-dark); color: #fff; }
@media (max-width: 860px) {
  .main-nav .has-sub > span::after { display: none; }
  .main-nav li > span { padding-bottom: .15em; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; }
  .main-nav li.active > span { color: var(--accent); }
  .main-nav a.nav-cta { display: inline-block; margin: .4rem 0 0 .9em; }
}

/* ---------- cookie consent ---------- */
[hidden] { display: none !important; }
.link-button { background: none; border: 0; padding: 0; font: inherit; color: inherit; text-decoration: underline; cursor: pointer; }
.copyright a, .copyright .link-button { color: #fff; }
.btn-outline { background: #fff; color: var(--accent); }
.btn-outline:hover, .btn-outline:focus { background: var(--bg-alt); color: var(--accent-dark); }
.cookie-banner {
  position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 200;
  max-width: 760px; margin: 0 auto; padding: 1rem 1.25rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1.25rem;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, .2);
}
.cookie-banner p { flex: 1 1 320px; margin: 0; font-size: .95rem; }
.cookie-actions { display: flex; gap: .5rem; }
.cookie-banner .btn { border: 2px solid var(--accent); font: inherit; font-weight: 700; padding: .5em 1.2em; cursor: pointer; }

/* ---------- closing call to action ---------- */
.cta-end { margin: 3rem 0 0; padding: 2.5rem 1.5rem; border-radius: 12px; text-align: center; color: #fff;
  background: linear-gradient(135deg, var(--accent-dark), var(--accent)); }
.cta-end h2 { margin: 0 0 .5rem; color: #fff; }
.cta-end p { max-width: 560px; margin: 0 auto 1.2rem; }
.cta-end .actions { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; max-width: none; }
.cta-end .btn { background: #fff; color: var(--accent-dark); border: 2px solid #fff; }
.cta-end .btn:hover, .cta-end .btn:focus { background: var(--bg-alt); color: var(--accent-dark); }
.cta-end .btn-ghost { background: transparent; color: #fff; }
.cta-end .btn-ghost:hover, .cta-end .btn-ghost:focus { background: rgba(255, 255, 255, .15); color: #fff; }
.cta-end .cta-meta { margin: 0 auto; font-size: .9rem; opacity: .85; }

/* ---------- link cards (Publications) ---------- */
.link-cards { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); margin: 2rem 0; }
.link-card { display: flex; flex-direction: column; gap: .6rem; padding: 1.4rem; text-decoration: none; color: var(--text);
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); transition: box-shadow .15s, transform .15s, border-color .15s; }
.link-card:hover, .link-card:focus-visible { border-color: var(--accent); box-shadow: 0 8px 24px rgba(0, 0, 0, .1); transform: translateY(-2px); color: var(--text); }
.lc-logo { display: flex; align-items: center; height: 56px; }
.lc-logo img { max-height: 100%; width: auto; max-width: 180px; }
.lc-title { font-size: 1.2rem; font-weight: 700; }
.lc-text { color: var(--muted); font-size: .95rem; flex: 1; }
.lc-go { color: var(--accent-dark); font-weight: 700; }
.lc-go::after { content: " \2192"; }

/* ---------- 404 ---------- */
.notfound { text-align: center; padding-top: clamp(2rem, 6vw, 4rem); padding-bottom: clamp(3rem, 8vw, 6rem); max-width: 720px; }
.nf-chart { width: min(100%, 480px); height: auto; margin: 0 auto; display: block; }
.nf-axis { stroke: var(--border); stroke-width: 2; }
.nf-curve { fill: none; stroke: var(--accent); stroke-width: 4; stroke-linecap: round; }
.nf-dot { fill: var(--accent); }
.nf-label { fill: var(--muted); font: 600 13px var(--font-sans); }
.nf-code { margin: .2em 0 0; font-size: clamp(4rem, 16vw, 7.5rem); font-weight: 800; line-height: 1; color: var(--accent); letter-spacing: -.04em; }
.notfound h1 { margin: .2em 0 .5em; }
.nf-lead { font-size: 1.15rem; margin: 0 auto 1rem; }
.nf-actions { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; margin: 0 0 1.5rem; }
.nf-actions .btn { border: 2px solid var(--accent); }
.nf-end { text-anchor: end; }
.nf-help { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); gap: 1rem; margin-top: 1rem; text-align: left; }
.nf-help section { background: var(--bg-alt); border-radius: var(--radius); padding: 1rem 1.25rem; }
.nf-help h2 { margin: 0 0 .5rem; font-size: 1.05rem; }
.nf-help ul { margin: 0; padding-left: 1.2rem; font-size: .95rem; }
.nf-help li { margin: .25rem 0; }

/* ---------- contact page ---------- */
.contact-hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 2rem; align-items: stretch; margin: 1.5rem 0 2.5rem; }
.contact-card { background: var(--bg-alt); border-radius: 12px; padding: 1.5rem 1.75rem; }
.contact-list { margin: 0; }
.contact-list div { display: grid; grid-template-columns: 5.5rem 1fr; gap: .5rem; padding: .75rem 0; border-bottom: 1px solid var(--border); }
.contact-list div:last-child { border-bottom: 0; }
.contact-list dt { font-weight: 700; color: var(--muted); }
.contact-list dd { margin: 0; }
.contact-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1rem 0 0; }
.contact-actions .btn { border: 2px solid var(--accent); }
.contact-photo { margin: 0; }
.contact-photo img { width: 100%; height: 100%; object-fit: cover; border-radius: 12px; }
.route { display: grid; grid-template-columns: 1.1fr 1fr; gap: 2rem; align-items: stretch; margin: 1rem 0 1.5rem; }
.route-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.route-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.1rem; }
.route-card h3 { margin: 0 0 .3rem; font-size: 1rem; }
.route-card p { margin: 0; font-size: .95rem; color: var(--muted); }
.route-map { margin: 0; }
.route-map a { display: block; height: 100%; }
.route-map img { width: 100%; height: 100%; object-fit: cover; border-radius: 12px; }
@media (max-width: 760px) {
  .contact-hero, .route { grid-template-columns: 1fr; gap: 1.25rem; }
  .contact-photo img, .route-map img { height: auto; max-height: 280px; }
  .route-cards { grid-template-columns: 1fr; }
  .contact-list div { grid-template-columns: 4.5rem 1fr; }
}

/* ---------- team and profiles ---------- */
.people { list-style: none; margin: 1rem 0 2rem; padding: 0; display: grid; gap: .75rem; grid-template-columns: repeat(auto-fill, minmax(min(230px, 100%), 1fr)); }
.people li { margin: 0; padding: .8rem 1rem; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; }
.team { max-width: var(--wrap); }
.media-text.profile { grid-template-columns: 240px 1fr; align-items: start; gap: 2rem; }
.media-text.profile .media img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; border-radius: var(--radius); }
@media (max-width: 700px) {
  .media-text.profile { grid-template-columns: 1fr; }
  .media-text.profile .media img { max-width: 220px; }
}

/* ---------- navigation buttons ---------- */
.route-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin: 0 0 1.5rem; }
.route-actions .btn, .content .btn-outline { border: 2px solid var(--accent); }
.content a { overflow-wrap: anywhere; }

/* ---------- search ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.main-nav a.nav-search { display: flex; align-items: center; gap: .4em; padding: .6em .7em; }
.main-nav a.nav-search span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
@media (max-width: 860px) {
  .main-nav a.nav-search span { position: static; width: auto; height: auto; clip: auto; }
}
.search-form { display: flex; gap: .5rem; margin: 1.5rem 0 1rem; }
.search-form input { flex: 1; min-width: 0; font: inherit; padding: .7em 1em; border: 2px solid var(--border); border-radius: 999px; }
.search-form input:focus { outline: none; border-color: var(--accent); }
.search-form .btn { border: 2px solid var(--accent); font: inherit; font-weight: 700; cursor: pointer; }
.search-status { color: var(--muted); min-height: 1.5em; }
.search-results { list-style: none; margin: 0; padding: 0; }
.search-results li { padding: 1rem 0; border-bottom: 1px solid var(--border); }
.search-results a { font-size: 1.15rem; font-weight: 700; }
.search-results .sr-url { display: block; color: var(--muted); font-size: .85rem; }
.search-results p { margin: .3rem 0 0; color: var(--text); }
mark { background: #ffe3e3; color: inherit; border-radius: 2px; padding: 0 .1em; }
.nf-search { max-width: 520px; margin: 0 auto 1.25rem; }