/* ---------------------------------------------------------------
   nitin — portfolio
   minimal · monochrome · lowercase
----------------------------------------------------------------- */

:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #4d4d4d;
  --faint: #8a8a8a;
  --line: #e6e6e6;
  --surface: #fafafa;
  --accent: #1a1a1a;
  --max: 760px;
  --pad: clamp(1.25rem, 5vw, 2rem);
  --radius: 10px;
}

[data-theme="dark"] {
  --bg: #0e0e0e;
  --fg: #f4f4f4;
  --muted: #b3b3b3;
  --faint: #777777;
  --line: #242424;
  --surface: #161616;
  --accent: #f4f4f4;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

a { color: inherit; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--fg);
  color: var(--bg);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------------- header / nav ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.9rem var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 3vw, 1.5rem);
}

.nav__links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}
.nav__links a:hover { color: var(--fg); }

@media (max-width: 540px) {
  .nav__links a:not(.theme-toggle) { display: none; }
}

.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  color: var(--muted);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.3s ease;
}
.theme-toggle:hover { color: var(--fg); border-color: var(--faint); }
[data-theme="dark"] .theme-toggle__icon { transform: rotate(180deg); }

/* ---------------- hero ---------------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 14vh, 8rem) var(--pad) clamp(3rem, 8vh, 5rem);
}

.hero__avatar {
  display: block;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 0 0.9rem;
  border: 1px solid var(--line);
  background: var(--surface);
}

.hero__eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: var(--faint);
  letter-spacing: 0.02em;
  margin: 0 0 1.25rem;
}

.hero__title {
  font-size: clamp(3rem, 12vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  font-weight: 600;
  margin: 0 0 1.5rem;
}

.hero__lede {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  color: var(--muted);
  max-width: 46ch;
  margin: 0 0 2rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--fg);
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.92rem;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--fg); color: var(--bg); }
.btn:not(.btn--primary):hover { background: var(--surface); }

/* ---------------- sections ---------------- */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vh, 4rem) var(--pad);
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(1rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
}

@media (max-width: 600px) {
  .section { grid-template-columns: 1fr; gap: 1rem; }
}

.section__label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--faint);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  margin: 0.35rem 0 0;
}

.section__body { min-width: 0; }

.prose {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}
.prose strong { color: var(--fg); font-weight: 500; }

code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85em;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.08em 0.4em;
  color: var(--fg);
}

/* ---------------- projects ---------------- */
.projects {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.project {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.4rem 1.5rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.project:hover {
  border-color: var(--faint);
  transform: translateY(-2px);
}

.project__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.project__name {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.15rem;
  font-weight: 500;
  margin: 0;
}
.project__name a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.project__name a:hover { border-bottom-color: var(--fg); }

.project__icon { font-size: 1.2rem; }

.project__desc {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.98rem;
}

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
}
.tags li {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
  background: var(--bg);
}

/* ---------------- list / stack ---------------- */
.list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  display: grid;
  gap: 0.4rem;
}

.stack {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.stack li {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.3rem 0.7rem;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.stack li:hover { color: var(--fg); border-color: var(--faint); }

/* ---------------- links ---------------- */
.links {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}
.links a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.92rem;
  text-decoration: none;
  color: var(--fg);
  border-bottom: 1px solid var(--faint);
  padding-bottom: 2px;
  transition: border-color 0.2s ease;
}
.links a:hover { border-color: var(--fg); }

/* ---------------- archive page ---------------- */
.hero--compact {
  padding-bottom: clamp(1.5rem, 4vh, 2.5rem);
}
.hero__title--sm {
  font-size: clamp(2.5rem, 9vw, 4rem);
}
.backlink {
  text-decoration: none;
  color: var(--faint);
  transition: color 0.2s ease;
}
.backlink:hover { color: var(--fg); }

.see-all {
  margin: 1.25rem 0 0;
}
.see-all a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.see-all a:hover { color: var(--fg); border-color: var(--faint); }

.archive {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}
.entry {
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--line);
}
.entry:last-child { border-bottom: none; padding-bottom: 0; }

.entry__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.4rem;
}
.entry__name {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.15rem;
  font-weight: 500;
  margin: 0;
}
.entry__year {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--faint);
  white-space: nowrap;
}
.entry__desc {
  margin: 0 0 0.9rem;
  color: var(--muted);
}
.entry__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 0.9rem;
}
.entry__links a {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--fg);
  border-bottom: 1px solid var(--faint);
  padding-bottom: 2px;
  transition: border-color 0.2s ease;
}
.entry__links a:hover { border-color: var(--fg); }

/* ---------------- footer ---------------- */
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem var(--pad) 4rem;
  border-top: 1px solid var(--line);
  text-align: center;
}
.footer__note { color: var(--muted); margin: 0 0 0.5rem; }
.footer__meta {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--faint);
  margin: 0;
}

/* ---------------- reveal animation ---------------- */
.section, .hero { opacity: 1; }
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* focus visibility */
:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 3px;
  border-radius: 4px;
}