:root {
  --accent: #4f46e5;
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
}
[data-theme="dark"] {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
}
* { box-sizing: border-box; }
body {
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  min-height: 100vh;
  transition: background .25s, color .25s;
}
main { max-width: 760px; margin: 0 auto; padding: 2em 1.5em; }

#theme-toggle {
  position: fixed;
  top: 1em;
  right: 1em;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 3em;
  height: 3em;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,.1);
  z-index: 10;
  overflow: hidden;
  transition: background .25s, border-color .25s, transform .25s, box-shadow .25s;
}
#theme-toggle:hover {
  border-color: var(--accent);
  transform: scale(1.08);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 20%, transparent);
}
#theme-toggle:active { transform: scale(.94); }
.theme-icon {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 55%;
  height: 55%;
  color: var(--accent);
  transition: transform .5s cubic-bezier(.4, 0, .2, 1), opacity .4s ease, rotate .5s cubic-bezier(.4, 0, .2, 1);
}
.theme-icon.moon { opacity: 0; transform: scale(.3) rotate(-90deg); }
[data-theme="light"] .theme-icon.sun { opacity: 1; transform: scale(1) rotate(0deg); }
[data-theme="light"] .theme-icon.moon { opacity: 0; transform: scale(.3) rotate(-90deg); }
[data-theme="dark"] .theme-icon.sun { opacity: 0; transform: scale(.3) rotate(90deg); }
[data-theme="dark"] .theme-icon.moon { opacity: 1; transform: scale(1) rotate(0deg); }

.hero { display: flex; gap: 1.5em; align-items: center; margin: 2em 0; flex-wrap: wrap; }
.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  flex-shrink: 0;
}
.avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  font-size: 2.4rem;
  font-weight: 700;
}
h1 { margin: 0; }
.accent { color: var(--accent); }
.tagline { color: var(--muted); font-size: 1.1rem; margin: .4em 0 1em; }
.links { display: flex; gap: .8em; flex-wrap: wrap; }
.links a {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 2px solid transparent;
}
.links a:hover { border-color: var(--accent); }
.link-icon { width: 1em; height: 1em; flex-shrink: 0; }

h2 { margin-top: 2em; border-bottom: 2px solid var(--border); padding-bottom: .3em; }

.chips { display: flex; flex-direction: column; gap: 1em; }
.skill-group { display: flex; flex-wrap: wrap; gap: .5em; align-items: center; }
.skill-group h3 { margin: 0; font-size: .95rem; color: var(--muted); width: 100%; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .3em .9em;
  font-size: .9rem;
  transition: border-color .15s, transform .15s;
}
.chip:hover { border-color: var(--accent); transform: translateY(-2px); }
.chip .icon { font-size: 1em; color: var(--accent); }

.projects { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1em; }
.card {
  position: relative;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4em;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity .2s;
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--accent) 15%, transparent);
}
.card:hover::before { opacity: 1; }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; }
.card-link { color: var(--muted); transition: color .15s, transform .15s; }
.card-link:hover { color: var(--accent); transform: scale(1.15); }
.card-link .icon { font-size: 1.4em; }
.card-icon {
  width: 3em;
  height: 3em;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  margin-bottom: .8em;
}
.card-icon .icon { font-size: 1.5em; }
.card h3 { margin: 0 0 .4em; }
.card p { margin: 0; color: var(--muted); }

.reveal { opacity: 0; animation: rise .5s ease-out forwards; }
@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; opacity: 1; }
  .theme-icon { transition: none; }
}

footer { margin: 3em 0 1em; color: var(--muted); text-align: center; font-size: .9rem; }