:root {
  --bg: #07080f;
  --bg-alt: #0f1120;
  --panel: #171a2a;
  --text: #f5f7ff;
  --muted: #a7aecc;
  --accent: #d1f56a;
  --accent-2: #6f67ff;
  --accent-3: #f27de2;
  --border: rgba(255, 255, 255, 0.12);
  --shadow: 0 20px 45px rgba(0, 0, 0, 0.4);
}

html[data-theme="light"] {
  --bg: #eef1ff;
  --bg-alt: #dfe5ff;
  --panel: #ffffff;
  --text: #121633;
  --muted: #4d5678;
  --accent: #839f19;
  --accent-2: #5549ea;
  --accent-3: #bf409e;
  --border: rgba(13, 22, 54, 0.14);
  --shadow: 0 10px 28px rgba(25, 35, 75, 0.14);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; scroll-behavior: smooth; }
body {
  font-family: "Inter", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 16% 12%, rgba(111,103,255,.22) 0%, transparent 35%), radial-gradient(circle at 86% 28%, rgba(210,245,106,.12) 0%, transparent 30%), var(--bg);
  line-height: 1.65;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container { width: min(1160px, 92%); margin-inline: auto; }
.section { padding: 92px 0; }
.section-alt { background: var(--bg-alt); }

h1, h2, h3, p { margin: 0; }
h2 { font-size: clamp(1.7rem, 2.8vw, 2.6rem); margin-top: 8px; }
.section-tag { color: var(--accent); font-size: .78rem; letter-spacing: .19em; font-weight: 700; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--bg) 76%, transparent);
}
.site-header.scrolled { border-color: var(--border); }
.nav { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { font-size: 1.35rem; font-weight: 800; }
.brand span { color: var(--accent); }
.nav-links { list-style: none; margin: 0; padding: 0; display: flex; gap: 26px; }
.nav-links a { color: var(--muted); font-weight: 600; font-size: .95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.theme-toggle, .menu-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
  border-radius: 11px;
}
.menu-toggle { display: none; }

.hero { padding: 86px 0 70px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center; }
.eyebrow { color: var(--accent); font-weight: 700; letter-spacing: .16em; font-size: .82rem; margin-bottom: 14px; }
.hero h1 { font-size: clamp(2.1rem, 5vw, 4rem); line-height: 1.1; margin-bottom: 18px; }
.hero h1 span { color: var(--accent-2); }
.lead { color: var(--muted); max-width: 62ch; }
.hero-cta { margin-top: 28px; display: flex; gap: 12px; }
.btn {
  height: 46px;
  padding: 0 20px;
  border-radius: 12px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.btn-primary { color: #fff; background: linear-gradient(140deg, var(--accent-2), var(--accent-3)); }
.btn-ghost { border-color: var(--border); }

.hero-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 16px;
  background: linear-gradient(160deg, rgba(111, 103, 255, 0.22), rgba(210, 245, 106, 0.12));
}
.hero-media img { border-radius: 20px; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.12); }
.hero-chip {
  position: absolute;
  padding: 8px 12px;
  border-radius: 11px;
  border: 1px solid var(--border);
  font-weight: 800;
  font-size: .85rem;
  background: var(--panel);
}
.chip-java { top: -14px; right: 18px; }
.chip-css { bottom: -12px; left: 14px; }
.chip-code { top: 42%; left: -14px; color: var(--accent); }

.hero-metrics { margin-top: 24px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; max-width: 680px; }
.hero-metrics div { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; }
.hero-metrics strong { display: block; color: var(--accent); font-size: 1.3rem; }
.hero-metrics span { color: var(--muted); font-size: .78rem; }
.social-links { list-style: none; padding: 0; margin: 24px 0 0; display: flex; gap: 12px; }
.social-links a { width: 37px; height: 37px; border: 1px solid var(--border); border-radius: 10px; display: grid; place-items: center; color: var(--muted); }
.social-links a:hover { color: var(--text); border-color: var(--accent-2); }

.two-col { display: grid; grid-template-columns: 1.1fr .9fr; gap: 26px; }
.about-cards { display: grid; gap: 14px; }
.info-card, .project-card, .cert-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.info-card p, .project-card p, .cert-card p { color: var(--muted); }
.info-card h3, .project-card h3, .cert-card h3 { margin-bottom: 8px; }

.section-head-inline { display: flex; justify-content: space-between; align-items: end; gap: 18px; }
.project-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-btn { background: transparent; border: 1px solid var(--border); color: var(--muted); border-radius: 10px; padding: 9px 12px; font-weight: 700; }
.filter-btn.active { color: var(--text); border-color: var(--accent-2); }

.projects-grid, .cert-grid { margin-top: 22px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 7px; margin: 12px 0; }
.project-tech span { font-size: .72rem; letter-spacing: .07em; border: 1px solid var(--border); border-radius: 999px; padding: 5px 8px; }
.project-link { display: inline-flex; margin-top: 4px; color: var(--accent); font-weight: 700; font-size: .85rem; }

.cert-card { position: relative; }
.cert-featured { border-color: color-mix(in srgb, var(--accent) 60%, var(--border)); }
.cert-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .72rem;
  padding: 4px 9px;
  color: var(--accent);
}
.cert-logo { display: inline-block; font-size: .72rem; font-weight: 800; border-radius: 8px; padding: 4px 8px; margin-bottom: 10px; }
.cert-logo.scrimba { background: rgba(255, 122, 0, .18); color: #ffb97f; }
.cert-logo.google { background: rgba(79, 70, 229, .18); color: #a8a4ff; }
.cert-logo.michigan { background: rgba(251, 191, 36, .2); color: #ffe39e; }
.cert-logo.codecademy, .cert-logo.jhu, .cert-logo.meta { background: rgba(20, 184, 166, .16); color: #8df4e4; }
.cert-meta { margin: 10px 0; color: var(--muted); font-size: .86rem; }
.cert-verify { display: inline-flex; gap: 6px; align-items: center; color: var(--accent); font-weight: 700; font-size: .86rem; }



.skills-grid { margin-top: 20px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.skill-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  background: linear-gradient(160deg, color-mix(in srgb, var(--panel) 88%, transparent), color-mix(in srgb, var(--accent-2) 8%, transparent));
  box-shadow: var(--shadow);
}
.skill-card h3 { margin-bottom: 10px; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.skill-card h3 i { color: var(--accent); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tags span {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.contact-wrap { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.contact-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.site-footer { padding: 24px 0 34px; border-top: 1px solid var(--border); }
.site-footer p { text-align: center; color: var(--muted); }

.hidden { display: none; }
.visible { opacity: 1 !important; transform: translateY(0) !important; }

@media (max-width: 1050px) {
  .projects-grid, .cert-grid, .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid, .two-col { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  .menu-toggle { display: inline-grid; place-items: center; }
  .nav-links {
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    padding: 18px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
  }
  .nav-links.open { display: flex; }
  .projects-grid, .cert-grid, .skills-grid, .hero-metrics { grid-template-columns: 1fr; }
  .section-head-inline, .contact-wrap { flex-direction: column; align-items: start; }
}