/* ============================================================
   Utkarsh Jha — portfolio styles
   Plain CSS, no build step. All colors are CSS variables so the
   whole theme can be changed in one place (and dark/light toggled).
   ============================================================ */

/* ---- Theme tokens ---- */
:root {
  --bg:        #0e0f12;
  --bg-soft:   #16181d;
  --border:    #262931;
  --text:      #e7e9ee;
  --text-dim:  #9aa0ab;
  --accent:    #6ee7b7;          /* single accent — change this to re-brand */
  --accent-ink:#06281c;
  --max:       760px;            /* content column width */
  --radius:    12px;
  --font: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code",
          Menlo, Consolas, monospace;
  --font-text: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;
}

/* Light theme — applied when <html data-theme="light"> */
html[data-theme="light"] {
  --bg:        #fbfbfa;
  --bg-soft:   #ffffff;
  --border:    #e3e3e0;
  --text:      #1a1c20;
  --text-dim:  #5c616b;
  --accent:    #0f9d6b;
  --accent-ink:#ffffff;
}

/* ---- Reset-ish ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* visible keyboard focus for accessibility */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---- Layout: everything in a centered column ---- */
.nav, main, .footer { max-width: var(--max); margin-inline: auto; padding-inline: 22px; }

/* ============ NAV ============ */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 16px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav__brand { font-family: var(--font); font-weight: 700; font-size: 1.1rem; color: var(--text); }
.nav__brand .dot { color: var(--accent); }
.nav__links { display: flex; align-items: center; gap: 18px; }
.nav__links a { color: var(--text-dim); font-size: .95rem; }
.nav__links a:hover { color: var(--text); text-decoration: none; }

.theme-toggle {
  background: none; border: 1px solid var(--border); color: var(--text);
  width: 34px; height: 34px; border-radius: 50%; cursor: pointer;
  font-size: 1rem; line-height: 1; display: grid; place-items: center;
  transition: border-color .2s ease, transform .2s ease;
}
.theme-toggle:hover { border-color: var(--accent); transform: rotate(180deg); }

/* ============ HERO ============ */
.hero { padding-block: 72px 60px; }

/* availability status: the highest-signal element for recruiters */
.status {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font); font-size: .82rem; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 13px;
  margin: 0 0 24px;
}
.status__dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 65%, transparent); }
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.hero__eyebrow { color: var(--text-dim); font-family: var(--font); margin: 0 0 6px; }
.hero__name {
  font-size: clamp(2.6rem, 9vw, 4.3rem); line-height: 1.02; margin: 0 0 14px;
  letter-spacing: -0.035em; font-weight: 800;
}
.hero__line { font-size: clamp(1.3rem, 4.5vw, 1.75rem); margin: 0 0 18px; color: var(--text); font-weight: 500; }
.hero__line .accent { color: var(--accent); }
.hero__sub { color: var(--text-dim); max-width: 56ch; margin: 0 0 28px; }
.hero__sub strong { color: var(--text); }

.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: var(--radius);
  font-family: var(--font); font-size: .95rem; border: 1px solid transparent;
  transition: transform .15s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn--ghost { border-color: var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); }

.hero__social { list-style: none; display: flex; gap: 20px; padding: 0; margin: 0; font-family: var(--font); }
.hero__social a { color: var(--text-dim); font-size: .9rem; }
.hero__social a:hover { color: var(--accent); }

/* ============ SECTIONS ============ */
.section { padding-block: 56px; border-top: 1px solid var(--border); }
.section__title {
  font-size: 1.5rem; margin: 0 0 8px; display: flex; align-items: baseline; gap: 12px;
  letter-spacing: -0.01em;
}
.section__num { font-family: var(--font); color: var(--accent); font-size: .9rem; }
.section__lead { color: var(--text-dim); margin: 0 0 30px; max-width: 56ch; }

/* ---- Work cards ---- */
.work { display: grid; gap: 18px; }
.card {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
  transition: border-color .2s ease, transform .2s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card__head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.card__title { font-size: 1.2rem; margin: 0; }
.card__what { margin: 0 0 10px; }
.card__problem { color: var(--text-dim); margin: 0 0 16px; font-size: .96rem; }
.card__problem strong { color: var(--text); }

.badge {
  font-family: var(--font); font-size: .7rem; text-transform: uppercase; letter-spacing: .05em;
  padding: 3px 8px; border-radius: 999px; border: 1px solid var(--border);
}
.badge--live { color: var(--accent); border-color: var(--accent); }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0 0 16px; }
.tags li {
  font-family: var(--font); font-size: .78rem; color: var(--text-dim);
  background: var(--bg); border: 1px solid var(--border); padding: 3px 9px; border-radius: 6px;
}
.card__links { display: flex; gap: 18px; font-family: var(--font); font-size: .9rem; }

/* ---- Services ---- */
.services { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 16px; }
.service { border-left: 2px solid var(--accent); padding-left: 16px; }
.service h3 { margin: 0 0 4px; font-size: 1.05rem; }
.service p { margin: 0; color: var(--text-dim); font-size: .96rem; }
.services__cta { font-family: var(--font); font-size: .95rem; }

/* ---- About ---- */
.about p { margin: 0 0 16px; }
.about__stack { color: var(--text-dim); }
.about__stack strong { color: var(--text); }

/* ============ FOOTER ============ */
.footer { padding-block: 64px 48px; border-top: 1px solid var(--border); text-align: center; }
.footer__title { font-size: clamp(1.8rem, 6vw, 2.6rem); margin: 0 0 8px; letter-spacing: -0.02em; }
.footer__lead { color: var(--text-dim); margin: 0 0 24px; }
.footer__links { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 22px; padding: 0; margin: 0 0 32px; font-family: var(--font); }
.footer__links a { color: var(--text); font-size: .95rem; }
.footer__links a:hover { color: var(--accent); }
.footer__meta { color: var(--text-dim); font-family: var(--font); font-size: .8rem; margin: 0; }

/* ============ RESPONSIVE ============ */
@media (min-width: 620px) {
  .services { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 460px) {
  body { font-size: 16px; }
  .nav__links { gap: 12px; }
  .nav__links a { font-size: .88rem; }
  .hero { padding-block: 56px 48px; }
}

/* respect users who prefer no motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
  .status__dot { animation: none; }
}

/* ============================================================
   HIRE-ME CAMPAIGN ADDITIONS
   stats strip · card thumbnails · open source · references ·
   case-study pages. All reuse the variables defined at the top.
   ============================================================ */

/* ---- Stats / impact strip (under hero) ---- */
.stats {
  display: flex; flex-wrap: wrap; gap: 14px 28px;
  padding: 18px 0 4px; margin-bottom: 4px;
  border-top: 1px solid var(--border);
}
.stats dt, .stats dd { margin: 0; }
.stat { display: flex; flex-direction: column; }
.stat__num {
  font-family: var(--font); font-size: 1.25rem; font-weight: 700; color: var(--accent);
  line-height: 1.2;
}
.stat__label { color: var(--text-dim); font-size: .82rem; }

/* ---- Card screenshot thumbnail ---- */
.card__thumb {
  display: block; margin: -22px -22px 16px; /* bleed to card edges */
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
  aspect-ratio: 16 / 9; background: var(--bg);
}
.card__thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
/* placeholder shown until a real screenshot is dropped in */
.card__thumb--empty {
  display: grid; place-items: center;
  color: var(--text-dim); font-family: var(--font); font-size: .8rem;
  background:
    repeating-linear-gradient(45deg, var(--bg) 0 10px, var(--bg-soft) 10px 20px);
}
/* make the card title clickable into the case study */
.card__title a { color: var(--text); }
.card__title a:hover { color: var(--accent); text-decoration: none; }
.card__title .arrow { color: var(--text-dim); font-weight: 400; }

/* ---- Open Source section ---- */
.oss { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.oss__item {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px;
  padding-bottom: 14px; border-bottom: 1px dotted var(--border);
}
.oss__repo { font-family: var(--font); color: var(--text); font-weight: 600; }
.oss__what { color: var(--text-dim); font-size: .95rem; flex: 1 1 240px; }
.oss__link { font-family: var(--font); font-size: .88rem; }
.oss__empty {
  color: var(--text-dim); font-size: .95rem;
  border: 1px dashed var(--border); border-radius: var(--radius); padding: 16px;
}

/* ---- References / testimonial ---- */
.refs { display: grid; gap: 16px; }
.ref {
  margin: 0; padding: 16px 20px; background: var(--bg-soft);
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}
.ref p { margin: 0 0 8px; }
.ref cite { color: var(--text-dim); font-style: normal; font-family: var(--font); font-size: .85rem; }

/* ---- Case-study pages ---- */
.case { max-width: 64ch; }
.case p { margin: 0 0 16px; }
.case h2 { margin-top: 8px; }
.case ul { color: var(--text-dim); padding-left: 20px; }
.case li { margin-bottom: 6px; }
.case figure { margin: 0 0 28px; }
.case figure img,
.case .diagram {
  width: 100%; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-soft);
}
.case figcaption { color: var(--text-dim); font-size: .82rem; margin-top: 8px; text-align: center; }
.case pre {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; overflow-x: auto; font-family: var(--font); font-size: .85rem;
  line-height: 1.6; margin: 0 0 20px;
}
.case code { font-family: var(--font); font-size: .9em; }
.case__meta {
  display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center;
  font-family: var(--font); font-size: .9rem; color: var(--text-dim); margin: 14px 0 0;
}
.case__back { font-family: var(--font); font-size: .9rem; }

@media (max-width: 460px) {
  .stat__num { font-size: 1.1rem; }
}
