/* ============================================================
   Nitish Chopra — UX Portfolio
   Faithful-but-minimal: warm ivory + ink + orange, clean type.
   ============================================================ */

:root {
  --ink: #16140f;
  --ink-soft: #3d3a34;
  --muted: #6f6a60;
  --ivory: #f4ecdf;
  --ivory-deep: #efe4d2;
  --paper: #ffffff;
  --orange: #ee8e3b;
  --line: #e3d8c5;

  --maxw: 1140px;
  --pad: clamp(1.25rem, 5vw, 4rem);
  --radius: 18px;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--ivory);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- HEADER / NAV ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem var(--pad);
  background: rgba(244, 236, 223, 0.82);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-weight: 600; text-decoration: none; letter-spacing: -0.01em;
}
.brand__mark {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--orange);
}

.nav { display: flex; align-items: center; }
.nav__links {
  list-style: none; display: flex; gap: 1.75rem;
  margin: 0; padding: 0; font-weight: 500;
}
.nav__links a {
  text-decoration: none; color: var(--ink-soft);
  padding: 0.25rem 0; position: relative;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px; background: var(--orange);
  transition: width 0.2s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }

.nav__toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 40px; height: 40px; padding: 0;
}
.nav__bars, .nav__bars::before, .nav__bars::after {
  display: block; height: 2px; width: 22px; background: var(--ink);
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav__bars { position: relative; margin: 0 auto; }
.nav__bars::before, .nav__bars::after { content: ""; position: absolute; left: 0; }
.nav__bars::before { top: -7px; }
.nav__bars::after { top: 7px; }
.nav__toggle[aria-expanded="true"] .nav__bars { background: transparent; }
.nav__toggle[aria-expanded="true"] .nav__bars::before { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__bars::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- SECTION SCAFFOLD ---------- */
main { display: block; }
.hero, .about, .work, .contact {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}
.section-label {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--orange);
  margin: 0 0 1.75rem;
}

/* ---------- HERO ---------- */
.hero {
  min-height: 82vh;
  display: flex; flex-direction: column; justify-content: center;
  padding-top: 3rem; padding-bottom: 3rem;
}
.hero__eyebrow {
  color: var(--orange); font-weight: 600; letter-spacing: 0.06em;
  margin: 0 0 1rem;
}
.hero__name {
  font-size: clamp(3.2rem, 13vw, 8.5rem);
  line-height: 0.95; letter-spacing: -0.04em; font-weight: 700;
  margin: 0 0 1.5rem;
}
.hero__tagline {
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  color: var(--ink-soft); max-width: 36ch; margin: 0 0 2.5rem;
}
.hero__scroll {
  align-self: flex-start; text-decoration: none; font-weight: 600;
  display: inline-flex; gap: 0.5rem; align-items: center;
  padding: 0.7rem 1.4rem; border: 1.5px solid var(--ink);
  border-radius: 100px; transition: background 0.2s ease, color 0.2s ease;
}
.hero__scroll:hover { background: var(--ink); color: var(--ivory); }
.hero__scroll span { transition: transform 0.2s ease; }
.hero__scroll:hover span { transform: translateY(3px); }

/* ---------- ABOUT ---------- */
.about { padding-top: 4rem; padding-bottom: 4rem; }
.about__grid {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: clamp(1.5rem, 5vw, 5rem);
  align-items: start;
}
.about__heading {
  font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -0.02em;
  margin: 0; font-weight: 600;
}
.about__body { font-size: 1.08rem; color: var(--ink-soft); }
.about__body p { margin: 0 0 1.1rem; }
.about__body p:last-child { margin-bottom: 0; }

.quote {
  margin: 4.5rem 0 0; padding: clamp(2rem, 5vw, 3.5rem);
  background: var(--orange); border-radius: var(--radius);
  text-align: center;
}
.quote p {
  font-size: clamp(1.4rem, 3.5vw, 2.2rem); font-weight: 600;
  letter-spacing: -0.02em; line-height: 1.2; margin: 0 0 1rem;
}
.quote cite { font-style: normal; color: rgba(22,20,15,0.7); font-weight: 500; }

/* ---------- WORK ---------- */
.work { padding-top: 4rem; padding-bottom: 2rem; }

.project {
  padding: clamp(2.5rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--line);
}
.project:first-of-type { border-top: 0; padding-top: 0; }

.project__head { max-width: 52rem; margin-bottom: 2.5rem; }
.project__num {
  display: inline-block; font-size: 0.95rem; font-weight: 700;
  letter-spacing: 0.05em; color: var(--accent, var(--orange));
  margin-bottom: 1rem;
}
.project__title {
  font-size: clamp(1.6rem, 4vw, 2.7rem); line-height: 1.1;
  letter-spacing: -0.025em; font-weight: 600; margin: 0 0 1.1rem;
}
.project__summary {
  font-size: clamp(1.02rem, 1.6vw, 1.18rem); color: var(--ink-soft);
  margin: 0 0 1.75rem; max-width: 44rem;
}
.project__meta {
  display: flex; flex-wrap: wrap; gap: 2.5rem; margin: 0;
  padding-top: 1.25rem; border-top: 1px solid var(--line);
}
.project__meta dt {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted); margin-bottom: 0.3rem;
}
.project__meta dd { margin: 0; font-weight: 500; }

/* narrative blocks */
.block { max-width: 44rem; margin: 2.75rem 0 1.75rem; }
.block h3 {
  font-size: 1.25rem; font-weight: 600; margin: 0 0 0.75rem;
  padding-left: 0.9rem; border-left: 3px solid var(--accent, var(--orange));
}
.block p { margin: 0; color: var(--ink-soft); }

/* screenshots */
.shot {
  margin: 1.75rem 0; background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(0.75rem, 2vw, 1.5rem); overflow: hidden;
}
.shot img { border-radius: 8px; margin: 0 auto; }
.shot--narrow img { max-width: 440px; }
.shot figcaption {
  margin-top: 0.9rem; font-size: 0.9rem; color: var(--muted);
  text-align: center; max-width: 60ch; margin-left: auto; margin-right: auto;
}

/* prototype buttons (placeholders until URLs are added) */
.proto-row { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2rem; }
.proto-link {
  display: inline-flex; align-items: center; gap: 0.5rem; margin-top: 2rem;
  text-decoration: none; font-weight: 600;
  padding: 0.7rem 1.4rem; border-radius: 100px;
  background: var(--ink); color: var(--ivory);
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.proto-row .proto-link { margin-top: 0; }
.proto-link span { transition: transform 0.18s ease; }
.proto-link:hover { opacity: 0.9; }
.proto-link:hover span { transform: translateX(3px); }

/* stats (Avishkaar) */
.stats {
  list-style: none; margin: 0 0 1rem; padding: 1.5rem;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  background: var(--ivory-deep); border-radius: var(--radius);
}
.stats li { font-size: 0.85rem; color: var(--muted); line-height: 1.35; }
.stats__num {
  display: block; font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700;
  color: var(--ink); letter-spacing: -0.02em;
}

/* ---------- CONTACT ---------- */
.contact { padding-top: 4rem; padding-bottom: 5rem; }
.contact__heading {
  font-size: clamp(2rem, 6vw, 3.5rem); letter-spacing: -0.03em;
  font-weight: 700; margin: 0 0 2.5rem;
}
.contact__list { list-style: none; margin: 0; padding: 0; }
.contact__list li {
  display: grid; grid-template-columns: 120px 1fr; gap: 1rem;
  align-items: baseline;
  padding: 1.1rem 0; border-top: 1px solid var(--line);
}
.contact__list li:last-child { border-bottom: 1px solid var(--line); }
.contact__label {
  font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--muted);
}
.contact__list a {
  text-decoration: none; font-size: clamp(1.05rem, 2.5vw, 1.4rem);
  font-weight: 500; word-break: break-word;
}
.contact__list a:hover { color: var(--orange); }

/* ---------- FOOTER ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem var(--pad);
  display: flex; flex-wrap: wrap; gap: 1rem;
  justify-content: space-between; align-items: center;
  font-size: 0.85rem; color: var(--muted);
  max-width: var(--maxw); margin: 0 auto;
}
.site-footer a { text-decoration: none; font-weight: 500; }
.site-footer a:hover { color: var(--orange); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 760px) {
  .about__grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .stats { grid-template-columns: repeat(2, 1fr); }

  .nav__toggle { display: block; }
  .nav__links {
    position: absolute; top: 100%; right: 0; left: 0;
    flex-direction: column; gap: 0; align-items: stretch;
    background: var(--ivory); border-bottom: 1px solid var(--line);
    padding: 0.5rem var(--pad) 1rem;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .nav__links.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav__links li { border-top: 1px solid var(--line); }
  .nav__links li:first-child { border-top: 0; }
  .nav__links a { display: block; padding: 0.85rem 0; }
  .nav__links a::after { display: none; }
}

@media (max-width: 480px) {
  .stats { grid-template-columns: 1fr; }
  .contact__list li { grid-template-columns: 1fr; gap: 0.25rem; }
}