:root {
  --bg: #f4f7fb;
  --surface: rgba(255,255,255,0.88);
  --surface-strong: #ffffff;
  --text: #162033;
  --muted: #5d6980;
  --line: rgba(18, 32, 51, 0.10);
  --accent: #1d6fdc;
  --accent-2: #7c3aed;
  --accent-soft: rgba(29,111,220,0.10);
  --success: #16885f;
  --warning: #b26b00;
  --shadow: 0 18px 45px rgba(13, 24, 45, 0.10);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124,58,237,0.08), transparent 32%),
    radial-gradient(circle at top right, rgba(29,111,220,0.10), transparent 28%),
    var(--bg);
  line-height: 1.6;
}

a { color: inherit; }
img { max-width: 100%; }
.container {
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
}
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 9999;
  background: #fff;
  color: #000;
  padding: 0.75rem 1rem;
  border-radius: 10px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  backdrop-filter: blur(12px);
  background: rgba(244,247,251,0.85);
  border-bottom: 1px solid rgba(18, 32, 51, 0.06);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
  min-width: 0;
}
.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-weight: 800;
  box-shadow: 0 8px 22px rgba(29,111,220,0.28);
}
.brand-copy strong {
  display: block;
  font-size: 1rem;
}
.brand-copy span {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  transition: 0.2s ease;
}
.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}
.site-nav .nav-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 10px 24px rgba(29,111,220,0.24);
}
.site-nav .nav-cta:hover,
.site-nav .nav-cta:focus-visible {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  filter: brightness(1.03);
}

.site-nav a.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}

.hero {
  padding: 4.4rem 0 3.2rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 1.6rem;
  align-items: stretch;
}
.panel {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
}
.hero-copy,
.hero-side,
.section-card,
.project-card,
.timeline,
.contact-card,
.skill-card,
.note-card,
.metric-card,
.cta-band {
  padding: 1.6rem;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.hero h1,
.page-hero h1 {
  font-size: clamp(2.2rem, 4.4vw, 4.4rem);
  line-height: 1.05;
  margin: 0.9rem 0 1rem;
  letter-spacing: -0.04em;
}
.lead {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 62ch;
}
.hero-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}
.button,
.button-secondary,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 48px;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition: 0.2s ease;
}
.button {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 28px rgba(29,111,220,0.22);
}
.button-secondary {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--text);
}
.button-link {
  color: var(--accent);
  padding-inline: 0;
  min-height: auto;
}
.button:hover,
.button-secondary:hover,
.button-link:hover,
.button:focus-visible,
.button-secondary:focus-visible,
.button-link:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.hero-metrics,
.metrics-grid,
.contact-grid,
.skills-grid,
.feature-grid,
.projects-grid,
.overview-grid {
  display: grid;
  gap: 1rem;
}
.hero-metrics,
.metrics-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hero-side {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.metric-card {
  background: rgba(255,255,255,0.74);
  border-radius: var(--radius-md);
  border: 1px solid rgba(18, 32, 51, 0.08);
}
.metric-card strong {
  display: block;
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 0.35rem;
}
.metric-card span,
.metric-card p {
  color: var(--muted);
  margin: 0;
}
.list-clean {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 0.75rem;
}
.list-clean li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  color: var(--muted);
}
.list-clean li i { color: var(--accent); margin-top: 0.18rem; }

main section {
  padding: 1rem 0 0;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.2rem;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  margin: 0.35rem 0 0;
  letter-spacing: -0.03em;
}
.section-head p,
.muted { color: var(--muted); }

.projects-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.project-card,
.skill-card,
.note-card,
.contact-card,
.section-card,
.timeline,
.cta-band {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: var(--shadow);
}
.project-card h3,
.skill-card h3,
.contact-card h3,
.section-card h3,
.timeline h3,
.note-card h3 {
  margin-top: 0;
  margin-bottom: 0.65rem;
  font-size: 1.15rem;
}
.project-top {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: flex-start;
  margin-bottom: 0.8rem;
}
.badges,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0.9rem 0 1rem;
}
.badge,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(18, 32, 51, 0.06);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
}
.badge.success { background: rgba(22,136,95,0.12); color: var(--success); }
.badge.warning { background: rgba(178,107,0,0.12); color: var(--warning); }
.badge.accent { background: rgba(29,111,220,0.12); color: var(--accent); }
.badge.soft { background: rgba(124,58,237,0.12); color: var(--accent-2); }

.kpi-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.kpi-list li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
}
.kpi-list i { color: var(--accent); margin-top: 0.18rem; }

.overview-grid {
  grid-template-columns: 1.1fr 0.9fr;
}
.feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.skills-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.skill-card ul,
.contact-list,
.timeline-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.skill-card li,
.contact-list li,
.timeline-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.65rem 0;
  border-bottom: 1px solid rgba(18, 32, 51, 0.08);
}
.skill-card li:last-child,
.contact-list li:last-child,
.timeline-list li:last-child { border-bottom: 0; }
.skill-card i,
.contact-list i,
.timeline-list i { color: var(--accent); margin-top: 0.15rem; }
.timeline-item strong { display: block; }
.timeline-meta {
  display: inline-flex;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: rgba(29,111,220,0.1);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.contact-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.contact-card p { color: var(--muted); }
.footer {
  padding: 2.5rem 0 3rem;
  color: var(--muted);
}
.footer-shell {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(18, 32, 51, 0.08);
}

.page-hero {
  padding: 3.4rem 0 2.6rem;
}
.page-hero .panel {
  padding: 1.8rem;
}

.snapshot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}
.snapshot-card {
  background: var(--surface);
  border: 1px solid rgba(18, 32, 51, 0.08);
  border-radius: var(--radius-md);
  padding: 1rem 1.05rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  box-shadow: var(--shadow);
}
.snapshot-label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.snapshot-card strong {
  font-size: 0.98rem;
  line-height: 1.35;
}

.solution-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.note-card h3 i { color: var(--accent); margin-right: 0.45rem; }

.arch-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: var(--shadow);
  padding: 1.6rem;
}
.arch-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}
.arch-flow li {
  display: grid;
  grid-template-columns: 38px 1fr;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  background: rgba(255,255,255,0.74);
  border: 1px solid rgba(18, 32, 51, 0.08);
  border-radius: var(--radius-md);
  position: relative;
}
.arch-flow li strong { font-size: 1rem; }
.arch-flow li .muted { font-size: 0.88rem; }
.arch-flow li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 27px;
  bottom: -10px;
  height: 10px;
  width: 2px;
  background: rgba(29,111,220,0.35);
}
.arch-step {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.85rem;
  grid-row: span 2;
}
.arch-flow li > strong { grid-column: 2; }
.arch-flow li > .muted { grid-column: 2; }

.screens-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.screenshot-placeholder { margin: 0; }
.screen-frame {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  background:
    linear-gradient(135deg, rgba(29,111,220,0.10), rgba(124,58,237,0.10)),
    repeating-linear-gradient(
      45deg,
      rgba(18,32,51,0.04) 0 8px,
      transparent 8px 16px
    ),
    var(--surface-strong);
  border: 1px dashed rgba(29,111,220,0.35);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  color: var(--accent);
  font-weight: 700;
  text-align: center;
  padding: 1rem;
}
.screen-frame i { font-size: 1.6rem; }
.screen-frame span { color: var(--text); font-size: 0.95rem; }
.screenshot-placeholder figcaption {
  margin-top: 0.55rem;
  font-size: 0.88rem;
}

.responsible-list {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: var(--shadow);
  padding: 1.4rem 1.6rem;
}

.challenge-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.roadmap-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: var(--shadow);
  padding: 1.4rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.roadmap-card h3 { margin: 0.2rem 0 0.4rem; font-size: 1.1rem; }

@media (max-width: 960px) {
  .snapshot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .roadmap-grid { grid-template-columns: 1fr; }
  .hero-grid,
  .overview-grid,
  .feature-grid,
  .contact-grid,
  .hero-metrics,
  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    inset: 78px 1rem auto 1rem;
    background: rgba(255,255,255,0.98);
    border: 1px solid rgba(18,32,51,0.08);
    border-radius: 22px;
    box-shadow: var(--shadow);
    padding: 0.9rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav.open { display: flex; }
  .site-nav a { border-radius: 14px; }
}

@media (max-width: 720px) {
  .hero { padding-top: 2.7rem; }
  .container { width: min(calc(100% - 1.2rem), var(--max)); }
  .hero-copy,
  .hero-side,
  .section-card,
  .project-card,
  .timeline,
  .contact-card,
  .skill-card,
  .note-card,
  .metric-card,
  .cta-band { padding: 1.2rem; }
  .site-nav { inset-inline: 0.6rem; }
  .snapshot-grid { grid-template-columns: 1fr; }
  .arch-card { padding: 1.2rem; }
}