:root {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --text: #132238;
  --muted: #5b6b80;
  --accent: #2563eb;
  --accent-2: #14b8a6;
  --border: rgba(148, 163, 184, 0.24);
  --shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
}

body.dark {
  --bg: #08111f;
  --surface: rgba(15, 23, 42, 0.78);
  --surface-solid: #0f172a;
  --text: #e5edf7;
  --muted: #99a8bb;
  --accent: #60a5fa;
  --accent-2: #2dd4bf;
  --border: rgba(148, 163, 184, 0.16);
  --shadow: 0 24px 48px rgba(2, 6, 23, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background:
    radial-gradient(circle at top, rgba(37, 99, 235, 0.12), transparent 32%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 22%, var(--bg) 100%);
  color: var(--text);
  transition: background 0.3s ease, color 0.3s ease;
}

body.dark {
  background:
    radial-gradient(circle at top, rgba(96, 165, 250, 0.12), transparent 30%),
    linear-gradient(180deg, #07101d 0%, var(--bg) 18%, var(--bg) 100%);
}

a {
  color: var(--accent);
  text-decoration: none;
}

img {
  max-width: 100%;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

main {
  padding-bottom: 72px;
}

section {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 72px;
}

.hero {
  width: min(1200px, calc(100% - 24px));
  margin: 18px auto 48px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.92), rgba(20, 184, 166, 0.82)),
    var(--surface-solid);
  color: #f8fbff;
  box-shadow: var(--shadow);
}

body.dark .hero {
  background:
    linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(37, 99, 235, 0.72)),
    var(--surface-solid);
}

.topbar,
.hero-content,
.about-grid,
.pillars,
.projects,
.signals-grid,
.contact-card {
  display: grid;
}

.topbar {
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 6px 6px 24px;
}

.brand {
  color: inherit;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.topbar-actions a {
  color: rgba(255, 255, 255, 0.88);
  font-weight: 500;
}

.hero-content {
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 12px 8px 24px;
}

.avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.2);
}

.eyebrow,
.section-kicker,
.project-type {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
}

.eyebrow,
.section-kicker {
  color: rgba(255, 255, 255, 0.76);
}

.section-kicker {
  color: var(--accent);
  margin-bottom: 10px;
}

.hero h1 {
  font-size: clamp(2.6rem, 5vw, 4.5rem);
  line-height: 0.95;
  margin-bottom: 16px;
}

.lead {
  max-width: 760px;
  font-size: 1.08rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
}

.hero-badges,
.hero-actions,
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-badges {
  margin: 22px 0 24px;
}

.hero-badges span,
.filter-chip {
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.92rem;
  backdrop-filter: blur(10px);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.button:hover,
.project-card:hover,
.filter-chip:hover,
#theme-toggle:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: #ffffff;
  color: #123269;
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #ffffff;
}

#theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  cursor: pointer;
  font-size: 1.15rem;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.15;
  max-width: 860px;
}

.section-heading-inline {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.about-grid,
.pillars,
.projects,
.signals-grid {
  gap: 18px;
}

.about-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.about-grid p,
.pillar-card p,
.project-card p,
.signal-card p,
.contact-card a {
  color: var(--muted);
  line-height: 1.75;
}

.pillars,
.signals-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pillar-card,
.project-card,
.signal-card,
.contact-card {
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.pillar-card,
.signal-card {
  border-radius: 22px;
  padding: 24px;
}

.projects {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card {
  border-radius: 24px;
  padding: 24px;
  min-height: 220px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.project-card:hover {
  box-shadow: 0 24px 40px rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.28);
}

.project-type {
  display: inline-block;
  color: var(--accent-2);
  margin-bottom: 16px;
}

.project-card h3,
.pillar-card h3,
.signal-card strong {
  color: var(--text);
}

.filters {
  justify-content: flex-end;
}

.filter-chip {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.filter-chip.active {
  background: var(--accent);
  color: #ffffff;
  border-color: transparent;
}

.contact-card {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  border-radius: 24px;
  padding: 24px;
}

.contact-card a {
  font-weight: 600;
}

[hidden] {
  display: none !important;
}

@media (max-width: 960px) {
  .hero-content,
  .about-grid,
  .pillars,
  .projects,
  .signals-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .section-heading-inline,
  .topbar {
    grid-template-columns: 1fr;
  }

  .section-heading-inline {
    align-items: start;
  }

  .filters {
    justify-content: flex-start;
  }
}

@media (max-width: 680px) {
  .hero {
    margin-top: 12px;
    border-radius: 22px;
    padding: 14px;
  }

  .hero-content {
    gap: 20px;
    padding: 6px 4px 18px;
  }

  .avatar {
    width: 112px;
    height: 112px;
  }

  section {
    width: min(calc(100% - 24px), 1120px);
    padding-bottom: 56px;
  }

  .topbar-actions {
    gap: 12px;
  }
}