:root {
  --teal-950: #0b3432;
  --teal-900: #104a46;
  --teal-800: #155f5a;
  --teal-700: #1b746d;
  --teal-100: #dcecea;
  --teal-50: #f0f7f6;
  --ink: #182628;
  --muted: #5e6e70;
  --line: #d7e2e1;
  --paper: #ffffff;
  --soft: #f5f8f8;
  --shadow: 0 18px 50px rgba(12, 54, 51, .11);
  --radius: 22px;
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.62;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, textarea { font: inherit; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 10px 14px; background: #fff; color: #111; border-radius: 8px; box-shadow: var(--shadow); }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(21,95,90,.12);
}
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 14px; background: var(--teal-800); color: #fff; font-weight: 800; letter-spacing: -.04em; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 1rem; line-height: 1.2; }
.brand small { color: var(--muted); font-size: .78rem; }
.main-nav { display: flex; align-items: center; gap: 24px; }
.main-nav a { text-decoration: none; color: #324345; font-size: .93rem; font-weight: 650; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--teal-700); }
.nav-cta { padding: 10px 16px; color: #fff !important; background: var(--teal-800); border-radius: 999px; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; padding: 10px; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--ink); border-radius: 99px; }

.hero { position: relative; overflow: hidden; padding: 96px 0 86px; background: linear-gradient(135deg, #f8fbfb 0%, #e8f3f1 100%); }
.hero-pattern { position: absolute; inset: 0; opacity: .5; background-image: radial-gradient(circle at 20% 10%, rgba(21,95,90,.12) 0 1px, transparent 1px), radial-gradient(circle at 80% 90%, rgba(21,95,90,.08) 0 1px, transparent 1px); background-size: 28px 28px, 42px 42px; }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(340px, .7fr); gap: 72px; align-items: center; }
.eyebrow, .section-kicker { margin: 0 0 12px; color: var(--teal-700); font-size: .79rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; line-height: 1.13; letter-spacing: -.025em; }
h1 { margin-bottom: 12px; font-size: clamp(3rem, 7vw, 6rem); }
h2 { margin-bottom: 18px; font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { margin-bottom: 10px; font-size: 1.22rem; }
.hero-role { margin: 0 0 18px; color: var(--teal-800); font-size: clamp(1.25rem, 3vw, 2rem); font-weight: 750; }
.hero-intro { max-width: 760px; margin: 0; color: #415254; font-size: 1.08rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 11px 20px; border: 1px solid transparent; border-radius: 999px; text-decoration: none; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--teal-800); color: #fff; box-shadow: 0 10px 24px rgba(21,95,90,.22); }
.button-secondary { border-color: rgba(21,95,90,.25); background: rgba(255,255,255,.7); color: var(--teal-900); }
.button-light { background: #fff; color: var(--teal-900); }
.button-outline-light { border-color: rgba(255,255,255,.42); color: #fff; }
.hero-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 0; margin: 34px 0 0; list-style: none; }
.hero-meta li { padding-top: 12px; border-top: 1px solid rgba(21,95,90,.18); }
.meta-label { display: block; color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.hero-visual { position: relative; min-height: 440px; }
.portrait-frame { width: min(330px, 78vw); aspect-ratio: 1; margin-left: auto; padding: 12px; border-radius: 50%; background: #fff; box-shadow: var(--shadow); }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }
.credential-card { position: absolute; max-width: 280px; padding: 18px 20px; border: 1px solid rgba(21,95,90,.14); border-radius: 18px; background: rgba(255,255,255,.92); box-shadow: var(--shadow); }
.credential-card strong, .credential-card span { display: block; }
.credential-kicker { color: var(--teal-700); font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
.credential-main { left: 0; bottom: 45px; }
.credential-side { right: 0; bottom: 0; }

.section { padding: 96px 0; }
.section-muted { background: var(--soft); }
.section-dark { background: var(--teal-950); color: #fff; }
.two-column-intro { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: start; }
.lead-copy { color: #405153; font-size: 1.05rem; }
.lead-copy p:first-child { margin-top: 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 54px; }
.stat-card { min-height: 165px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.stat-card strong { display: block; color: var(--teal-800); font-size: 2.25rem; line-height: 1; }
.stat-card span { display: block; margin-top: 14px; color: var(--muted); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 38px; }
.section-heading > p { max-width: 560px; margin: 0 0 6px; color: var(--muted); }
.section-heading-light > p { color: rgba(255,255,255,.68); }
.expertise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.expertise-card { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.card-number { display: inline-grid; place-items: center; width: 38px; height: 38px; margin-bottom: 24px; border-radius: 12px; background: var(--teal-50); color: var(--teal-700); font-weight: 800; }
.expertise-card p { margin-bottom: 0; color: var(--muted); }
.timeline { max-width: 900px; }
.timeline-item { display: grid; grid-template-columns: 180px 1fr; gap: 36px; padding: 34px 0; border-top: 1px solid var(--line); }
.timeline-date { color: var(--teal-700); font-weight: 800; }
.timeline-company { margin: 0 0 4px; color: var(--muted); font-weight: 650; }
.timeline-content p:last-child, .timeline-content ul:last-child { margin-bottom: 0; }
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.project-card { padding: 28px; border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); background: rgba(255,255,255,.06); }
.project-card-featured { background: linear-gradient(145deg, rgba(255,255,255,.13), rgba(255,255,255,.06)); }
.project-topline { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 28px; color: #9dd0cb; font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; }
.project-client { color: #9dd0cb; font-weight: 700; }
.project-card p:last-child { margin-bottom: 0; color: rgba(255,255,255,.72); }
.more-projects { margin-top: 22px; border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); overflow: hidden; }
.more-projects summary { cursor: pointer; padding: 20px 24px; font-weight: 800; }
.more-projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(255,255,255,.12); border-top: 1px solid rgba(255,255,255,.12); }
.more-projects-grid article { padding: 24px; background: var(--teal-950); }
.more-projects-grid span { color: #9dd0cb; font-size: .78rem; font-weight: 800; }
.more-projects-grid p { color: rgba(255,255,255,.7); }
.section-cta { display: flex; justify-content: center; margin-top: 28px; }
.education-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 70px; }
.education-intro { color: var(--muted); }
.education-list article { padding: 24px 0; border-top: 1px solid var(--line); }
.education-list span { color: var(--teal-700); font-weight: 800; }
.education-list p { margin-bottom: 0; color: var(--muted); }
.skills-panel { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 30px; margin-top: 54px; padding: 30px; border-radius: var(--radius); background: var(--teal-50); }
.skills-label { margin-top: 0; font-weight: 800; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list span { padding: 8px 12px; border-radius: 999px; background: #fff; color: #405153; font-size: .85rem; }
.language-grid { display: grid; gap: 8px; }
.language-grid span { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; border-bottom: 1px solid rgba(21,95,90,.12); }
.contact-section { padding: 88px 0; color: #fff; background: linear-gradient(135deg, var(--teal-900), var(--teal-700)); }
.contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 64px; align-items: center; }
.contact-grid h2 { max-width: 760px; }
.contact-grid > div > p:not(.section-kicker) { color: rgba(255,255,255,.76); }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.contact-card { padding: 28px; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); background: rgba(255,255,255,.08); font-style: normal; }
.contact-card div { padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
.contact-card div:last-child { border-bottom: 0; }
.contact-card span { display: block; color: rgba(255,255,255,.63); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.contact-card a, .contact-card p { margin: 2px 0 0; color: #fff; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.site-footer { padding: 28px 0; background: #071f1e; color: rgba(255,255,255,.74); }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; align-items: center; }
.footer-inner strong, .footer-inner span { display: block; }
.footer-inner strong { color: #fff; }
.footer-inner p { margin: 0; }
.back-to-top { position: fixed; right: 20px; bottom: 20px; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--teal-800); color: #fff; box-shadow: var(--shadow); cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(12px); transition: .2s; }
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }

/* Portfolio page */
.portfolio-hero { padding: 92px 0 72px; background: linear-gradient(135deg, #0b3432 0%, #155f5a 55%, #2f8a82 100%); color: #fff; }
.portfolio-hero .eyebrow { color: #b9e0dc; }
.portfolio-hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; align-items: end; }
.portfolio-hero h1 { margin-bottom: 18px; }
.portfolio-lead { max-width: 760px; margin: 0; color: rgba(255,255,255,.78); font-size: 1.1rem; }
.portfolio-hero .button-primary { background: #fff; color: var(--teal-900); box-shadow: none; }
.portfolio-hero .button-secondary { color: #fff; border-color: rgba(255,255,255,.34); background: rgba(255,255,255,.08); }
.portfolio-summary { display: grid; gap: 10px; padding: 22px; border: 1px solid rgba(255,255,255,.2); border-radius: var(--radius); background: rgba(255,255,255,.08); }
.portfolio-summary div { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.13); }
.portfolio-summary div:last-child { border-bottom: 0; }
.portfolio-summary strong, .portfolio-summary span { display: block; }
.portfolio-summary strong { font-size: 1.08rem; }
.portfolio-summary span { color: rgba(255,255,255,.66); font-size: .88rem; }
.portfolio-toolbar { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 28px; }
.filter-button { border: 1px solid var(--line); padding: 10px 15px; border-radius: 999px; background: #fff; color: #425355; cursor: pointer; font-weight: 700; }
.filter-button:hover, .filter-button.is-active { border-color: var(--teal-800); background: var(--teal-800); color: #fff; }
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }
.portfolio-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 30px rgba(12,54,51,.06); transition: transform .22s ease, box-shadow .22s ease; }
.portfolio-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.portfolio-card[hidden] { display: none !important; }
.portfolio-card-featured { grid-column: span 2; }
.portfolio-card-visual { position: relative; min-height: 155px; padding: 18px; display: flex; justify-content: space-between; align-items: flex-start; color: #fff; overflow: hidden; }
.portfolio-card-visual::before, .portfolio-card-visual::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.32); }
.portfolio-card-visual::before { width: 180px; height: 180px; right: -65px; bottom: -95px; }
.portfolio-card-visual::after { width: 90px; height: 90px; right: 55px; bottom: -45px; }
.portfolio-year, .portfolio-category { position: relative; z-index: 1; display: inline-flex; min-height: 30px; align-items: center; padding: 5px 10px; border-radius: 999px; background: rgba(4,28,27,.28); backdrop-filter: blur(6px); font-size: .75rem; font-weight: 800; letter-spacing: .04em; }
.portfolio-card-body { padding: 24px; }
.portfolio-client { margin: 0 0 7px; color: var(--teal-700); font-size: .79rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; }
.portfolio-card-body > p:not(.portfolio-client) { color: var(--muted); }
.deliverables { padding-left: 19px; margin: 18px 0 0; color: #405153; }
.deliverables li + li { margin-top: 5px; }
.visual-buildings { background: linear-gradient(135deg, #164f56, #267e78); }
.visual-pnrr { background: linear-gradient(135deg, #526f68, #8ea995); }
.visual-sport { background: linear-gradient(135deg, #35665b, #72a189); }
.visual-slope { background: linear-gradient(135deg, #5b4d3e, #9c8467); }
.visual-fire { background: linear-gradient(135deg, #694b42, #a87162); }
.visual-road { background: linear-gradient(135deg, #334e58, #61808c); }
.visual-acoustic { background: linear-gradient(135deg, #4e526d, #7a81a8); }
.visual-water { background: linear-gradient(135deg, #245b6c, #4f8fa4); }
.visual-road-alt { background: linear-gradient(135deg, #434d57, #71808d); }
.visual-bridge { background: linear-gradient(135deg, #695b4d, #a58e77); }
.visual-highway { background: linear-gradient(135deg, #384d49, #6d8d86); }
.visual-quarry { background: linear-gradient(135deg, #5d5844, #968d6c); }
.visual-tunnel { background: linear-gradient(135deg, #202e33, #536a70); }
.visual-monitoring { background: linear-gradient(135deg, #185968, #4b9aae); }
.portfolio-note { margin-top: 28px; color: var(--muted); font-size: .9rem; }
.process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.process-grid article { padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.process-grid span { display: block; margin-bottom: 20px; color: var(--teal-700); font-weight: 850; }
.process-grid p { margin-bottom: 0; color: var(--muted); }

@media (max-width: 980px) {
  .hero-grid, .portfolio-hero-grid, .two-column-intro, .education-layout, .contact-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 48px; }
  .hero-visual { min-height: 390px; max-width: 560px; }
  .stats-grid, .expertise-grid, .projects-grid, .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-card-featured { grid-column: span 2; }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .skills-panel { grid-template-columns: 1fr 1fr; }
  .main-nav { position: fixed; top: 78px; left: 20px; right: 20px; display: none; flex-direction: column; align-items: stretch; gap: 4px; padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow); }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 11px 10px; }
  .menu-toggle { display: block; }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .section { padding: 70px 0; }
  .hero { padding: 70px 0 64px; }
  h1 { font-size: clamp(2.7rem, 14vw, 4.2rem); }
  h2 { font-size: clamp(1.85rem, 10vw, 2.7rem); }
  .hero-meta, .stats-grid, .expertise-grid, .projects-grid, .portfolio-grid, .more-projects-grid, .skills-panel, .process-grid { grid-template-columns: 1fr; }
  .portfolio-card-featured { grid-column: auto; }
  .hero-visual { min-height: 360px; }
  .portrait-frame { margin-inline: auto; }
  .credential-main { left: 0; bottom: 42px; }
  .credential-side { right: 0; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 10px; }
  .timeline-item { grid-template-columns: 1fr; gap: 10px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .portfolio-card-visual { min-height: 135px; }
}

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