:root {
  --bg: #ffffff;
  --bg-alt: #f5f6fa;
  --surface: #ffffff;
  --text: #14161f;
  --muted: #5b6072;
  --border: #e4e6ee;
  --accent: #5b4bff;
  --accent-2: #9b5cff;
  --accent-soft: rgba(91, 75, 255, 0.1);
  --radius: 16px;
  --shadow: 0 10px 30px rgba(20, 22, 31, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f15;
    --bg-alt: #14161f;
    --surface: #1a1c27;
    --text: #eceef5;
    --muted: #a0a5b8;
    --border: #2a2d3b;
    --accent: #8b7dff;
    --accent-2: #b98bff;
    --accent-soft: rgba(139, 125, 255, 0.14);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

.container { width: min(1120px, 100% - 32px); margin-inline: auto; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 26px; border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 600;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px var(--accent-soft); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-small { padding: 9px 18px; font-size: .9rem; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-weight: 800; font-size: 1.4rem; letter-spacing: -.02em; }
.logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; font-weight: 500; }
.nav-links a:not(.btn) { color: var(--muted); }
.nav-links a:not(.btn):hover { color: var(--text); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; margin: 5px 0; background: var(--text); transition: .2s; }

/* Hero */
.hero { padding: 96px 0 80px; background:
  radial-gradient(600px 300px at 85% 10%, var(--accent-soft), transparent 70%),
  radial-gradient(500px 300px at 0% 90%, var(--accent-soft), transparent 70%); }
.hero-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: center; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: .85rem; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 12px; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.1; letter-spacing: -.03em; font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); line-height: 1.2; letter-spacing: -.02em; margin-bottom: 32px; }
h3 { font-size: 1.15rem; margin-bottom: 8px; }
.accent { background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 1.15rem; color: var(--muted); margin: 20px 0 32px; max-width: 600px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-cta.center { justify-content: center; }

.hero-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 24px; padding: 32px; box-shadow: var(--shadow);
}
.avatar {
  width: 88px; height: 88px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 800; font-size: 1.8rem; margin-bottom: 24px;
}
.stats { list-style: none; display: grid; gap: 18px; }
.stats li { display: flex; align-items: baseline; gap: 14px; }
.stats strong { font-size: 1.8rem; font-weight: 800; min-width: 70px; }
.stats span { color: var(--muted); }

/* Sections */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); }
.two-col { display: grid; grid-template-columns: 1fr 1.4fr; gap: 56px; }
.prose p { color: var(--muted); margin-bottom: 16px; font-size: 1.05rem; }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tags li { padding: 6px 14px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-weight: 500; font-size: .9rem; }
.tags.small { margin-top: 14px; }
.tags.small li { font-size: .8rem; padding: 4px 10px; }

.grid { display: grid; gap: 24px; }
.cards { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.card p { color: var(--muted); }
.icon { width: 48px; height: 48px; border-radius: 12px; background: var(--accent-soft); display: grid; place-items: center; margin-bottom: 18px; }
.icon svg { width: 24px; height: 24px; fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.projects { grid-template-columns: repeat(3, 1fr); }
.project { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface); transition: transform .2s, box-shadow .2s; }
.project:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.project-thumb { aspect-ratio: 16 / 9; background-size: cover; background-position: center; }
.p1 { background-image: linear-gradient(135deg, #2f8f6b, #9ad3a8); }
.p2 { background-image: linear-gradient(135deg, #f08a4b, #f7c873); }
.p3 { background-image: linear-gradient(135deg, #5b4bff, #b98bff); }
.project-body { padding: 24px; }
.project-body p { color: var(--muted); }

.steps { list-style: none; grid-template-columns: repeat(4, 1fr); }
.steps li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.steps span { display: block; font-weight: 800; font-size: 1.5rem; color: var(--accent); margin-bottom: 12px; }
.steps p { color: var(--muted); }

.contact { text-align: center; }
.contact .lead { margin-inline: auto; }
.socials { list-style: none; display: flex; justify-content: center; gap: 24px; margin-top: 32px; }
.socials a { color: var(--muted); font-weight: 500; }
.socials a:hover { color: var(--accent); }

.footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a:hover { color: var(--accent); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner, .two-col { grid-template-columns: 1fr; gap: 40px; }
  .cards, .projects { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 8px 16px 20px;
    background: var(--bg); border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 12px 0; }
  .nav-links .btn { margin-top: 8px; }
  .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 { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
  .cards, .projects, .steps { grid-template-columns: 1fr; }
}