/*
  Utsav Verma — Personal Site Styles
  Clean, responsive, developer-focused design with subtle interactions.
*/

:root {
  --bg: #ffffff;
  --text: #0f172a; /* slate-900 */
  --muted: #475569; /* slate-600 */
  --link: #2563eb; /* blue-600 */
  --accent: #0ea5e9; /* sky-500 */
  --border: #e2e8f0; /* slate-200 */
  --card: #f8fafc; /* slate-50 */
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --link: #60a5fa;
    --accent: #38bdf8;
    --border: #1f2937;
    --card: #111827;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 1000px; margin: 0 auto; padding: 0 1.25rem; }

header.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
header .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; letter-spacing: 0.3px; }
nav a { color: var(--text); text-decoration: none; margin-left: 1rem; }
nav a:hover { color: var(--link); }

.hero {
  padding: 4rem 0 2rem;
}
.hero h1 { font-size: clamp(2rem, 6vw, 3rem); margin: 0 0 0.5rem; }
.hero .subtitle { color: var(--muted); font-size: 1.1rem; max-width: 60ch; }

.cta { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.25rem; }
.button {
  display: inline-block; border: 1px solid var(--border); border-radius: 8px; padding: 0.6rem 0.9rem;
  text-decoration: none; color: var(--text); background: var(--card);
}
.button.primary { background: var(--link); color: white; border-color: var(--link); }
.button:hover { filter: brightness(1.05); transform: translateY(-1px); transition: all 160ms ease; }

.section { padding: 2.25rem 0; }
.section h2 { margin: 0 0 1rem; font-size: 1.6rem; }
.section p { color: var(--muted); }

.grid { display: grid; gap: 1rem; }
.cards { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.card { border: 1px solid var(--border); background: var(--card); border-radius: 12px; padding: 1rem; }
.card h3 { margin: 0 0 0.25rem; font-size: 1.1rem; }
.card .meta { color: var(--muted); font-size: 0.95rem; }

ul.clean { list-style: none; padding: 0; margin: 0; }
ul.clean li { margin: 0.25rem 0; }

.social { display: flex; gap: 0.75rem; }
.social a { display: inline-flex; align-items: center; gap: 0.4rem; text-decoration: none; color: var(--text); border: 1px solid var(--border); border-radius: 999px; padding: 0.4rem 0.7rem; background: var(--card); }
.social a:hover { color: var(--link); }

footer.site-footer { border-top: 1px solid var(--border); padding: 1rem 0; margin-top: 2rem; color: var(--muted); }

/* Skip to content accessibility */
.sr-only { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.sr-only:focus { left: 1rem; top: 1rem; width: auto; height: auto; padding: 0.5rem 0.75rem; background: var(--card); color: var(--text); border: 1px solid var(--border); border-radius: 8px; box-shadow: 0 2px 6px rgba(0,0,0,.08); z-index: 1000; }

/* Blog */
.post-list { display: grid; gap: 1rem; }
.post-card { border: 1px solid var(--border); border-radius: 10px; padding: 1rem; background: var(--card); }
.post-card a { text-decoration: none; color: var(--text); }
.post-card a:hover { color: var(--link); }
.post-card .date { color: var(--muted); font-size: 0.9rem; }

/* Code highlighting tweaks (Rouge classes) */
pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }
pre { background: #0f172a10; border: 1px solid var(--border); border-radius: 10px; padding: 1rem; overflow: auto; }
code { background: #0f172a10; padding: 0.15rem 0.35rem; border-radius: 6px; }

/* Responsive */
@media (max-width: 640px) {
  nav a { margin-left: 0.75rem; }
  .hero { padding-top: 3rem; }
}