/* ============================================================
   Himanshu Jha — Senior Product Manager
   Design system: neutral canvas + single ink-teal accent
   Display: Bitter (warm slab-serif) / Body: Inter / Data: IBM Plex Mono
   ============================================================ */

:root {
  /* Color tokens */
  --color-bg: #FAFAF8;
  --color-bg-raised: #FFFFFF;
  --color-ink: #1C1D1F;
  --color-ink-soft: #5B5D63;
  --color-border: #E4E3DF;
  --color-accent: #1B4B45;      /* ink teal — the single accent */
  --color-accent-soft: #E4EDEB; /* teal tint for chips/backgrounds */
  --color-focus: #0E7C6B;
  --color-danger: #B3261E;

  /* Type */
  --font-display: "Bitter", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Spacing scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 2.75rem;
  --space-6: 4rem;

  --max-width: 1280px;
  --radius: 3px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0; }
p { margin: 0 0 var(--space-2); color: var(--color-ink-soft); }
button { font-family: inherit; cursor: pointer; }

/* Visible keyboard focus everywhere */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.skip-link:focus { left: var(--space-2); top: var(--space-2); }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* ---------- Header / Nav ---------- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: none;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}
.logo {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.logo .accent-dot { color: var(--color-accent); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.4rem 0.6rem;
}
.nav-toggle svg { width: 20px; height: 20px; display: block; }

.main-nav { border-bottom: 1px solid var(--color-border); }
.main-nav > .wrap { max-width: none; padding-top: var(--space-2); padding-bottom: var(--space-2); padding-left: var(--space-4); padding-right: var(--space-4); }
.main-nav ul { display: flex; gap: var(--space-3); align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.main-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  padding: 0.35rem 0.1rem;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] { color: var(--color-ink); border-color: var(--color-accent); }
.main-nav a.nav-cta {
  color: #fff;
  background: var(--color-accent);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border-bottom: none;
}
.main-nav a.nav-cta:hover { background: #133a35; }

@media (max-width: 780px) {
  .nav-toggle { display: inline-flex; align-items: center; }

  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-raised);
    z-index: 200;
    display: none;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .main-nav.open { display: block; }
  .main-nav .wrap { padding: var(--space-3); }
  .main-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav li { border-bottom: 1px solid var(--color-border); }
  .main-nav a { display: block; padding: 0.85rem 0.1rem; font-size: 0.98rem; }
  .main-nav a.nav-cta { display: inline-block; margin-top: var(--space-2); }

  /* Prevent the page behind the menu from scrolling while it's open */
  body.nav-open { overflow: hidden; }
}

/* Slightly smaller base type on small phones so headings/body copy don't feel oversized */
@media (max-width: 480px) {
  html { font-size: 15px; }
}

/* ---------- Eyebrow / labels (signature mono tag system) ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--color-accent);
}

/* ---------- Hero ---------- */
.hero {
  padding: var(--space-5) 0 var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.hero-split .wrap { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: var(--space-5); align-items: center; }
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  max-width: 920px;
  margin: var(--space-2) 0 var(--space-3);
}
.hero-copy h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  max-width: 680px;
  margin: var(--space-2) 0 var(--space-3);
}
.hero .lede, .hero-copy .lede { font-size: 1.1rem; max-width: 56ch; color: var(--color-ink-soft); }
.hero-actions { display: flex; gap: var(--space-2); margin-top: var(--space-3); flex-wrap: wrap; }

.hero-photo { position: relative; justify-self: center; width: 100%; max-width: 260px; }
.hero-photo::before {
  content: "";
  position: absolute;
  top: 10px; left: 10px;
  width: 100%;
  aspect-ratio: 4 / 5;
  background: var(--color-accent-soft);
  border-radius: var(--radius);
  z-index: 0;
}
.hero-photo-frame {
  position: relative;
  z-index: 1;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg-raised);
  aspect-ratio: 4 / 5;
}
.hero-photo-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-photo-frame .corner {
  position: absolute;
  width: 14px; height: 14px;
  border-color: var(--color-accent);
  z-index: 2;
}
.hero-photo-frame .corner.tl { top: 8px; left: 8px; border-top: 2px solid; border-left: 2px solid; }
.hero-photo-frame .corner.br { bottom: 8px; right: 8px; border-bottom: 2px solid; border-right: 2px solid; }
.hero-photo-frame.img-fallback img { display: none; }
.hero-photo-frame.img-fallback::after {
  content: "Add your photo — see docs/CONTENT-GUIDE.md";
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--space-2);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  background: var(--color-accent-soft);
}
.hero-photo-caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-ink-soft);
  text-align: center;
  margin-top: var(--space-2);
  letter-spacing: 0.04em;
}

@media (max-width: 860px) {
  .hero-split .wrap { grid-template-columns: 1fr; gap: var(--space-4); }
  .hero-split .hero-photo { order: -1; max-width: 220px; margin: 0 auto; }
  .hero .lede, .hero-copy .lede { max-width: none; }
}
@media (max-width: 480px) {
  .hero-split .hero-photo { max-width: 150px; }
  .hero-copy h1 { font-size: 1.85rem; }
  .hero-photo::before { top: 6px; left: 6px; }
}

.btn {
  display: inline-block;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-ink);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.btn-primary:hover { background: #133a35; border-color: #133a35; }
.btn-secondary { background: transparent; color: var(--color-ink); }
.btn-secondary:hover { background: var(--color-ink); color: #fff; }

/* ---------- Metric ticker (mono data strip) ---------- */
.metric-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin: var(--space-5) 0;
}
.metric-strip .metric {
  padding: var(--space-3);
  border-right: 1px solid var(--color-border);
}
.metric-strip .metric:last-child { border-right: none; }
.metric .value {
  font-family: var(--font-mono);
  font-size: 2rem;
  color: var(--color-accent);
  display: block;
}
.metric .label {
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  margin-top: 0.25rem;
  display: block;
}

/* ---------- Section scaffolding ---------- */
section { padding: var(--space-4) 0; }
section.tight { padding: var(--space-3) 0; }
@media (max-width: 480px) {
  .wrap { padding: 0 var(--space-2); }
  section { padding: var(--space-3) 0; }
}
.section-head { margin-bottom: var(--space-4); max-width: 62ch; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-top: var(--space-1); }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: var(--space-3); }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
@media (max-width: 1024px) { .grid-3 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 780px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  border: 1px solid var(--color-border);
  background: var(--color-bg-raised);
  border-radius: var(--radius);
  padding: var(--space-3);
}

/* Case study preview card */
.case-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3);
  background: var(--color-bg-raised);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.case-card:hover { border-color: var(--color-accent); transform: translateY(-2px); }
.case-card .tag-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: 0.25rem 0 0.5rem; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
}
.case-card h3 { font-size: 1.25rem; }
.case-card .impact-line {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  margin-top: auto;
  padding-top: var(--space-1);
}

/* ---------- Structured case-study annotation layout (signature element) ---------- */
.case-study-header {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
}
.case-study-header .tag-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: var(--space-2) 0; }
.case-study-header h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); max-width: 24ch; }
.case-study-meta { display: flex; gap: var(--space-4); flex-wrap: wrap; margin-top: var(--space-3); font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-ink-soft); }
.case-study-meta strong { color: var(--color-ink); display: block; font-family: var(--font-body); font-size: 0.95rem; }

.annotated-block {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}
.annotated-block:last-of-type { border-bottom: none; }
.annotated-block .rail {
  position: sticky;
  top: 90px;
  align-self: start;
}
.annotated-block .rail .num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.4rem;
}
.annotated-block .rail .rail-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-left: 2px solid var(--color-accent);
  padding-left: 0.6rem;
}
.annotated-block .content h3 { font-size: 1.2rem; margin-bottom: 0.6rem; }
.annotated-block .content ul { margin: 0.6rem 0; }
.annotated-block .content li { position: relative; padding-left: 1.1rem; margin-bottom: 0.4rem; color: var(--color-ink-soft); }
.annotated-block .content li::before { content: "•"; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }

@media (max-width: 700px) {
  .annotated-block { grid-template-columns: 1fr; }
  .annotated-block .rail { position: static; }
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-2);
}
.result-metrics .rm {
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: var(--space-2);
  background: var(--color-bg-raised);
}
.result-metrics .rm .value { font-family: var(--font-mono); font-size: 1.5rem; color: var(--color-accent); display: block; }
.result-metrics .rm .label { font-size: 0.82rem; color: var(--color-ink-soft); }

/* ---------- Product visuals (case study screenshots) ---------- */
.figure-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-2);
}
.figure {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg-raised);
}
.figure .figure-media {
  aspect-ratio: 16 / 10;
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.figure .figure-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.figure .figure-placeholder {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-accent);
  text-align: center;
  padding: var(--space-2);
  letter-spacing: 0.03em;
}
.figure figcaption {
  padding: 0.65rem 0.85rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-ink-soft);
}
.figure figcaption .fig-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.2rem;
}

/* ---------- Resume / timeline ---------- */
.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.timeline-item:last-child { border-bottom: none; }
.timeline-item time { font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-ink-soft); }
.timeline-item h3 { font-size: 1.1rem; }
.timeline-item .org { color: var(--color-accent); font-weight: 600; font-size: 0.95rem; }
.timeline-item ul { margin-top: 0.6rem; }
.timeline-item li { position: relative; padding-left: 1.1rem; margin-bottom: 0.35rem; color: var(--color-ink-soft); font-size: 0.95rem; }
.timeline-item li::before { content: "•"; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }
@media (max-width: 700px) { .timeline-item { grid-template-columns: 1fr; } }

.skills-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skills-chips .tag { font-size: 0.78rem; padding: 0.35rem 0.7rem; }

/* ---------- Icon cards (leadership, education) ---------- */
.icon-card {
  border: 1px solid var(--color-border);
  background: var(--color-bg-raised);
  border-radius: var(--radius);
  padding: var(--space-3);
}
.icon-chip {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-2);
}
.icon-chip svg { width: 20px; height: 20px; }
.icon-card h3 { font-size: 1.05rem; }

/* ---------- Award list ---------- */
.award-list { display: flex; flex-direction: column; gap: var(--space-2); }
.award-list li {
  display: flex; align-items: center; gap: var(--space-3);
  border: 1px solid var(--color-border);
  background: var(--color-bg-raised);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
}
.award-icon {
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
}
.award-icon svg { width: 18px; height: 18px; }
.award-list strong { display: block; font-size: 0.95rem; color: var(--color-ink); }
.award-list span:not(.award-icon) { font-size: 0.85rem; color: var(--color-ink-soft); }

/* ---------- Forms ---------- */
.form-field { margin-bottom: var(--space-3); }
.form-field label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 0.4rem; }
.form-field .hint { font-size: 0.8rem; color: var(--color-ink-soft); margin-top: 0.3rem; }
.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-bg-raised);
  color: var(--color-ink);
}
.form-field input:invalid:not(:placeholder-shown),
.form-field textarea:invalid:not(:placeholder-shown) { border-color: var(--color-danger); }
.form-error { color: var(--color-danger); font-size: 0.82rem; margin-top: 0.3rem; display: none; }
.form-field.error .form-error { display: block; }
.form-field.error input,
.form-field.error textarea { border-color: var(--color-danger); }

/* Honeypot — hidden from sighted users AND screen readers, but present for bots */
.hp-field { position: absolute; left: -9999px; top: -9999px; }

.form-status { margin-top: var(--space-2); font-size: 0.92rem; padding: var(--space-2); border-radius: var(--radius); display: none; }
.form-status.visible { display: block; }
.form-status.success { background: var(--color-accent-soft); color: var(--color-accent); }
.form-status.failure { background: #FBEAE9; color: var(--color-danger); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  margin-top: var(--space-5);
}
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); }
.footer-grid nav ul { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.footer-grid a { font-size: 0.88rem; color: var(--color-ink-soft); }
.footer-grid a:hover { color: var(--color-accent); }
.copyright { font-size: 0.8rem; color: var(--color-ink-soft); margin-top: var(--space-3); }

/* ---------- Footer social icons ---------- */
.social-icons { display: flex; align-items: center; gap: var(--space-2); }
.icon-link { color: var(--color-ink-soft); transition: color 0.15s ease; }
.icon-link:hover { color: var(--color-accent); }
.icon-link svg { width: 20px; height: 20px; display: block; }
/* Twitter/X is wired up but hidden until there's a real profile to link —
   remove the .is-hidden class in the footer markup (all pages) to show it. */
.icon-link.is-hidden { display: none; }

/* ---------- Blog list ---------- */
.post-card { border-bottom: 1px solid var(--color-border); padding: var(--space-3) 0; }
.post-card time { font-family: var(--font-mono); font-size: 0.78rem; color: var(--color-ink-soft); }
.post-card h3 { font-size: 1.2rem; margin: 0.4rem 0; }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}