:root {
  --navy: #2E3192;
  --navy-700: #23266f;
  --sky: #29ABE2;
  --sky-300: #7fd0f2;
  --sky-text: #0a72a6;
  --ink: #0b0d2e;
  --text: #1f2342;
  --muted: #5a5f7d;
  --bg: #ffffff;
  --bg-alt: #f4f6fc;
  --line: #e2e6f3;
  --radius: 16px;
  --shadow: 0 10px 30px -12px rgba(46, 49, 146, .25);
  --container: 1160px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); 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(--navy); }
a:hover { color: var(--sky); }
h1, h2, h3 { line-height: 1.2; color: var(--ink); margin: 0 0 .6em; letter-spacing: -.01em; }
h2 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; border-radius: 4px; }

.container { width: min(100% - 2.5rem, var(--container)); margin-inline: auto; }
.narrow { max-width: 820px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: 1rem; top: -100px; z-index: 100; background: var(--navy); color: #fff; padding: .6rem 1rem; border-radius: 8px; }
.skip-link:focus { top: 1rem; color: #fff; }

.eyebrow { text-transform: uppercase; letter-spacing: .14em; font-size: .8rem; font-weight: 700; color: var(--sky-text); margin-bottom: .75rem; }
.hero .eyebrow, .contact .eyebrow { color: var(--sky); }
.accent { color: var(--sky); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .85rem 1.5rem; border-radius: 999px; border: 2px solid var(--sky);
  background: var(--sky); color: #04112b; font-family: inherit; font-weight: 700; text-decoration: none; font-size: 1rem;
  cursor: pointer; transition: transform .15s ease, background .15s ease, color .15s ease;
}
.btn:hover { background: #fff; border-color: #fff; color: var(--navy); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn-ghost:hover { background: #fff; color: var(--navy); }
.btn-sm { padding: .5rem 1.1rem; font-size: .95rem; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: saturate(180%) blur(10px); -webkit-backdrop-filter: saturate(180%) blur(10px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand img { width: 150px; height: auto; }
.site-nav ul { display: flex; align-items: center; gap: 1.35rem; list-style: none; }
.site-nav a:not(.btn) { color: var(--text); text-decoration: none; font-weight: 600; font-size: .97rem; }
.site-nav a:not(.btn):hover { color: var(--navy); }
.site-nav .btn-sm { color: #04112b; }
.site-nav .btn-sm:hover { background: var(--navy); border-color: var(--navy); color: #fff; }
.site-nav a[aria-current="page"]:not(.btn) { color: var(--navy); box-shadow: inset 0 -2px 0 var(--sky); }
.lang-switch { display: flex; align-items: center; gap: .15rem; font-size: .85rem; font-weight: 700; border: 1px solid var(--line); border-radius: 999px; padding: .15rem; }
.lang-switch > * { padding: .2rem .55rem; border-radius: 999px; line-height: 1.4; }
.lang-switch .lang-current { background: var(--navy); color: #fff; }
.site-nav .lang-switch a { font-size: .85rem; color: var(--muted); }
.site-nav .lang-switch a:hover { color: var(--navy); background: var(--bg-alt); }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; padding: 10px; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; background: var(--navy); margin: 5px 0; border-radius: 2px; transition: transform .2s, opacity .2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero { position: relative; isolation: isolate; color: #dfe4ff; background: var(--ink); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(100deg, rgba(8,9,36,.92) 0%, rgba(8,9,36,.7) 50%, rgba(8,9,36,.25) 100%); }
.hero-content { padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 6vw, 5rem); }
.hero h1 { color: #fff; font-size: clamp(2rem, 1.2rem + 3vw, 3.5rem); max-width: 22ch; font-weight: 800; letter-spacing: -.02em; }
.hero .lead { font-size: clamp(1.05rem, 1rem + .4vw, 1.25rem); max-width: 60ch; color: #c9cff5; }
.hero .lead strong { color: #fff; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .9rem; margin: 2rem 0 3.5rem; }
.hero-stats { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; max-width: 960px; }
.hero-stats li { padding: 1rem 1.1rem; border: 1px solid rgba(255,255,255,.14); border-radius: 14px; background: rgba(255,255,255,.05); backdrop-filter: blur(4px); }
.hero-stats strong { display: block; color: #fff; font-size: 1.5rem; line-height: 1.2; }
.hero-stats span { font-size: .9rem; color: #b5bce6; }

/* Sections */
.section { padding: clamp(4rem, 8vw, 6.5rem) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 680px; margin-bottom: 2.75rem; }
.section-head p:last-child { color: var(--muted); }

.about { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.about-media img { border-radius: var(--radius); box-shadow: var(--shadow); aspect-ratio: 3 / 2; object-fit: cover; }
.checklist { list-style: none; margin-top: 1.5rem; display: grid; gap: .6rem; }
.checklist li { position: relative; padding-left: 2rem; }
.checklist li::before { content: ""; position: absolute; left: 0; top: .3em; width: 1.2rem; height: 1.2rem; border-radius: 50%; background: var(--sky) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 5 5 9-10'/%3E%3C/svg%3E") center / 70% no-repeat; }

.icon { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.icon-fill { fill: currentColor; stroke: none; }

.cards { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 1.25rem; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cdd3ee; }
.card .icon { width: 44px; height: 44px; padding: 9px; border-radius: 12px; background: rgba(41,171,226,.12); color: var(--navy); margin-bottom: 1rem; }
.card p { color: var(--muted); font-size: .97rem; margin: 0; }
.card-highlight { background: linear-gradient(155deg, var(--navy) 0%, var(--navy-700) 100%); border-color: transparent; }
.card-highlight h3 { color: #fff; }
.card-highlight p { color: #cfd4f7; }
.card-highlight .icon { background: rgba(41,171,226,.2); color: var(--sky); }

.steps { list-style: none; counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.steps li { counter-increment: step; position: relative; padding: 1.5rem 1.4rem 1.4rem; border-top: 3px solid var(--sky); background: var(--bg-alt); border-radius: 0 0 var(--radius) var(--radius); }
.steps li::before { content: "0" counter(step); display: block; font-weight: 800; font-size: 1.9rem; color: var(--navy); opacity: .25; line-height: 1; margin-bottom: .6rem; }
.steps p { color: var(--muted); font-size: .97rem; margin: 0; }

.skills { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.skill-group { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.4rem; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: .45rem; }
.chips li { font-size: .88rem; padding: .3rem .75rem; border-radius: 999px; background: rgba(46,49,146,.07); color: var(--navy); font-weight: 600; }
.sectors { margin-top: 2.5rem; }
.chips-lg li { font-size: .97rem; padding: .5rem 1rem; background: #fff; border: 1px solid var(--line); }

.timeline { list-style: none; position: relative; margin-left: .5rem; }
.timeline::before { content: ""; position: absolute; left: 0; top: .5rem; bottom: .5rem; width: 2px; background: linear-gradient(var(--sky), var(--navy)); }
.timeline > li { position: relative; padding: 0 0 2.25rem 2.25rem; }
.timeline > li::before { content: ""; position: absolute; left: -7px; top: .35rem; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--sky); }
.timeline > li:first-child::before { background: var(--sky); }
.timeline .when { font-size: .85rem; font-weight: 700; color: var(--sky-text); margin: 0 0 .25rem; letter-spacing: .04em; }
.timeline p, .timeline li li { color: var(--muted); }
.timeline ul { list-style: none; display: grid; gap: .5rem; }
.timeline li li strong { color: var(--text); }

.extra { display: grid; grid-template-columns: 1fr 1.4fr; gap: 1.25rem; margin-top: 1rem; }
.extra-box { background: var(--bg-alt); border-radius: var(--radius); padding: 1.6rem; }
.extra-box p { color: var(--muted); }
.pubs { list-style: none; display: grid; gap: .55rem; font-size: .95rem; }
.pubs li { padding-left: 1rem; border-left: 2px solid var(--sky); color: var(--text); }
.pubs em { color: var(--muted); }

.faq { display: grid; gap: .75rem; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 0 1.25rem; }
.faq summary { cursor: pointer; list-style: none; font-weight: 700; color: var(--ink); padding: 1.1rem 2rem 1.1rem 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 1.5rem; color: var(--sky); transition: transform .2s; }
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 1.1rem; margin: 0; }

/* Blog */
.post-list { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; }
.post-card { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; display: flex; flex-direction: column; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cdd3ee; }
.post-card h3, .post-card h2 { font-size: 1.2rem; }
.post-card h3 a, .post-card h2 a { color: var(--ink); text-decoration: none; }
.post-card h3 a::after, .post-card h2 a::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.post-card h3 a:hover, .post-card h2 a:hover { color: var(--navy); }
.post-card p { color: var(--muted); font-size: .97rem; margin: 0; }
.post-card .post-meta { margin-bottom: .6rem; }
.post-meta { font-size: .85rem; font-weight: 600; color: var(--sky-text); letter-spacing: .02em; }
.section-more { margin: 2rem 0 0; }
.link-arrow { font-weight: 700; text-decoration: none; }
.link-arrow::after { content: " →"; }

/* Sub pages */
.page-hero { position: relative; isolation: isolate; background: linear-gradient(120deg, var(--ink) 0%, #171a5f 60%, var(--navy) 100%); color: #c9cff5; padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2.5rem, 5vw, 3.75rem); }
.page-hero h1 { color: #fff; font-size: clamp(1.9rem, 1.2rem + 2.6vw, 3rem); max-width: 26ch; font-weight: 800; letter-spacing: -.02em; }
.page-hero .lead { font-size: clamp(1.05rem, 1rem + .3vw, 1.2rem); max-width: 62ch; margin: 0; }
.page-hero .eyebrow { color: var(--sky); }
.page-hero .post-meta { color: var(--sky-300); margin: 1.25rem 0 0; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: .35rem; font-size: .88rem; margin-bottom: 1.25rem; }
.breadcrumbs li + li::before { content: "/"; margin-right: .35rem; color: rgba(255,255,255,.4); }
.breadcrumbs a { color: var(--sky-300); text-decoration: none; }
.breadcrumbs a:hover { color: #fff; text-decoration: underline; }
.breadcrumbs [aria-current] { color: #fff; }

.prose, .page-hero .article-head { max-width: 72ch; }
.prose h2 { font-size: clamp(1.4rem, 1.1rem + 1vw, 1.8rem); margin-top: 2.2em; }
.prose > h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.4rem; margin: 0 0 1.2em; display: grid; gap: .4rem; }
.prose li::marker { color: var(--sky-text); }
.prose blockquote { margin: 1.5em 0; padding: 1rem 1.25rem; border-left: 4px solid var(--sky); background: var(--bg-alt); border-radius: 0 12px 12px 0; color: var(--text); }
.prose blockquote p:last-child { margin: 0; }
.prose .lead-in { font-size: 1.15rem; color: var(--ink); }
.prose code { font-size: .92em; background: var(--bg-alt); padding: .1em .35em; border-radius: 6px; }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.5em; font-size: .95rem; }
.prose th, .prose td { text-align: left; padding: .6rem .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { color: var(--ink); background: var(--bg-alt); }
.table-wrap { overflow-x: auto; }

.cta-box { margin-top: 3rem; padding: clamp(1.5rem, 3vw, 2.25rem); border-radius: var(--radius); background: linear-gradient(155deg, var(--navy) 0%, var(--navy-700) 100%); color: #cfd4f7; }
.cta-box h2 { color: #fff; margin-top: 0; font-size: 1.5rem; }
.cta-box a:not(.btn) { color: #fff; }
.cta-box .hero-cta { margin: 1.5rem 0 0; }

.author-box { display: flex; gap: 1rem; align-items: flex-start; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: .95rem; color: var(--muted); }
.author-box .avatar { flex: none; width: 52px; height: 52px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; font-weight: 800; letter-spacing: .02em; }
.author-box strong { color: var(--ink); }
.author-box p { margin: 0; }

.related { margin-top: 3rem; }
.related h2 { font-size: 1.4rem; }

/* Contact */
.contact { position: relative; isolation: isolate; color: #d7ddff; background: var(--ink); padding: clamp(4rem, 8vw, 6.5rem) 0; overflow: hidden; }
.contact-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; opacity: .55; }
.contact::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(11,13,46,.96) 0%, rgba(23,26,95,.85) 55%, rgba(11,13,46,.7) 100%); }
.contact h2 { color: #fff; }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.contact-links { list-style: none; display: grid; gap: .8rem; margin-top: 2rem; }
.contact-links a { display: inline-flex; align-items: center; gap: .8rem; color: #fff; text-decoration: none; font-weight: 600; font-size: 1.1rem; padding: .8rem 1.2rem; border-radius: 12px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.14); transition: background .15s, border-color .15s; }
.contact-links a:hover { background: rgba(41,171,226,.18); border-color: var(--sky); color: #fff; }
.contact-links .icon { color: var(--sky); }
.contact-form { background: #fff; color: var(--text); border-radius: var(--radius); padding: clamp(1.5rem, 3vw, 2.25rem); box-shadow: 0 30px 60px -20px rgba(0,0,0,.5); }
.contact-form h3 { font-size: 1.4rem; margin-bottom: .3rem; }
.form-note { font-size: .88rem; color: var(--muted); }
.contact-form label { display: block; font-weight: 600; font-size: .92rem; margin: 1rem 0 .35rem; }
.contact-form input, .contact-form textarea { width: 100%; font: inherit; font-size: 1rem; padding: .75rem .9rem; border: 1.5px solid var(--line); border-radius: 10px; background: #fbfcff; color: var(--text); }
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: var(--sky); box-shadow: 0 0 0 4px rgba(41,171,226,.18); }
.contact-form textarea { resize: vertical; }
.contact-form .btn { margin-top: 1.25rem; width: 100%; }
.contact-form .btn:hover { background: var(--navy); border-color: var(--navy); color: #fff; }

/* Footer */
.site-footer { background: #070820; color: #a9afd6; padding: 3rem 0 1.5rem; font-size: .95rem; }
.footer-inner { display: grid; grid-template-columns: 1.2fr 1.4fr 1fr; gap: 2rem; align-items: start; }
.footer-brand img { width: 140px; margin-bottom: .9rem; }
.footer-legal strong { color: #fff; }
.footer-nav ul { list-style: none; display: grid; gap: .4rem; }
.site-footer a { color: #d7ddff; text-decoration: none; }
.site-footer a:hover { color: var(--sky); }
.copyright { border-top: 1px solid rgba(255,255,255,.08); margin-top: 2rem; padding-top: 1.25rem; font-size: .85rem; color: #7d83ad; }

/* Responsive */
@media (max-width: 980px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .skills { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 1080px) {
  .nav-toggle { display: block; }
  .site-nav { position: absolute; top: 68px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 20px 30px -20px rgba(0,0,0,.25); display: none; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: .5rem 1.25rem 1.25rem; }
  .site-nav li a:not(.btn) { display: block; padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .site-nav a[aria-current="page"]:not(.btn) { box-shadow: none; color: var(--sky-text); }
  .site-nav .lang-switch { align-self: flex-start; margin-top: 1rem; }
  .site-nav li.lang-switch a:not(.btn) { display: inline; padding: .2rem .55rem; border: 0; }
  .site-nav .btn-sm { margin-top: 1rem; width: 100%; padding: .8rem; }
}
@media (max-width: 860px) {
  .about, .contact-inner, .extra { grid-template-columns: 1fr; }
  .hero::after { background: linear-gradient(180deg, rgba(8,9,36,.85), rgba(8,9,36,.75)); }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .hero-stats, .steps, .skills, .footer-inner { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: .6rem; }
  .hero-stats li { padding: .8rem; }
  .hero-stats strong { font-size: 1.2rem; }
  .hero-stats span { font-size: .8rem; }
  .hero-cta .btn { flex: 1 1 100%; }
  .contact-links a { font-size: 1rem; width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
@media print {
  .site-header, .hero-bg, .contact-bg, .contact-form, .nav-toggle { display: none !important; }
  .hero, .contact { background: #fff; color: #000; }
  .hero::after, .contact::after { display: none; }
  .hero h1, .contact h2 { color: #000; }
}