/* ============================================================
   Dhruv Shah · Statistical Consulting
   Calm, credible, academic-but-human.
   ============================================================ */

:root {
  --ink: #1b2a3a;          /* deep navy text */
  --ink-soft: #44566b;     /* secondary text */
  --paper: #faf8f4;        /* warm off-white background */
  --paper-alt: #f1ede5;    /* alternating section background */
  --accent: #1e6f6b;       /* deep teal */
  --accent-dark: #14504d;
  --accent-soft: #e3efee;  /* pale teal wash */
  --line: #ddd6c9;
  --card: #ffffff;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(27, 42, 58, 0.07), 0 8px 24px rgba(27, 42, 58, 0.06);
  --font-serif: "Newsreader", Georgia, serif;
  --font-sans: "Inter", -apple-system, "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
}

.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

/* ============ NAV ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 248, 244, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.brand-sub { color: var(--ink-soft); font-weight: 400; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--accent-dark); }

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 999px;
}
.nav-cta:hover { background: var(--accent-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--ink);
  cursor: pointer;
}

/* ============ HERO ============ */
.hero {
  padding: 40px 0 44px;
  background:
    radial-gradient(900px 480px at 88% -12%, var(--accent-soft) 0%, transparent 62%),
    radial-gradient(700px 400px at -5% 110%, #eef4ec 0%, transparent 60%),
    var(--paper);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 44px;
}

.hero-text { max-width: 620px; }

/* ----- Hero "question -> method" rotator ----- */
.hero-demo {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px 26px 20px;
  box-shadow: var(--shadow);
}

.hero-demo-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
}
.hero-demo-caret { margin-left: 6px; display: inline-block; animation: caretNudge 1.6s ease-in-out infinite; }

.hero-demo-stage { display: grid; }

.demo-slide {
  grid-area: 1 / 1;
  margin: 0;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  pointer-events: none;
}
.demo-slide.is-active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.demo-q {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.32rem;
  line-height: 1.38;
  color: var(--ink);
  margin: 0 0 20px;
}

.demo-a-label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--ink-soft);
  margin-bottom: 9px;
}
.demo-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.demo-tags li {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border: 1px solid #cfe6e4;
  border-radius: 999px;
  padding: 5px 13px;
}

.demo-dots { display: flex; gap: 9px; margin-top: 22px; }
.demo-dots button {
  width: 9px; height: 9px; padding: 0;
  border-radius: 50%;
  border: none;
  background: var(--line);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}
.demo-dots button:hover { background: #c2bba9; }
.demo-dots button.is-active { background: var(--accent); transform: scale(1.3); }

@keyframes caretNudge { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(3px); } }

@media (prefers-reduced-motion: reduce) {
  .demo-slide { transition: opacity 0.25s ease; transform: none; }
  .hero-demo-caret { animation: none; }
}

.hero-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2rem, 4.6vw, 3rem);
  margin-bottom: 16px;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent-dark);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin-bottom: 22px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
}

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-dark); color: #fff; }

.btn-ghost {
  border: 1.5px solid var(--accent);
  color: var(--accent-dark);
}
.btn-ghost:hover { background: var(--accent-soft); }

.btn-ghost-light {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}
.btn-ghost-light:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

.hero-locator {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* ============ SECTIONS ============ */
.section { padding: 52px 0; }
.section-alt { background: var(--paper-alt); }

.section-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}

.section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin-bottom: 16px;
}

.section-lead {
  color: var(--ink-soft);
  max-width: 640px;
  margin-bottom: 26px;
  font-size: 1.05rem;
}

.section-foot {
  margin-top: 32px;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

/* ============ CARD GRID (questions + projects) ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 2px 6px rgba(27,42,58,0.08), 0 14px 34px rgba(27,42,58,0.10);
  border-color: #cfc7b6;
}

.quote-card p {
  font-size: 1rem;
  color: var(--ink-soft);
}
.quote-card strong { color: var(--ink); }

/* ============ SERVICES ============ */
.service-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.service {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow);
}

.service h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.service p {
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.service.featured {
  grid-column: 1 / -1;
  background: var(--accent-soft);
  border-color: var(--accent);
  position: relative;
}
.service.featured h3 { color: var(--accent-dark); font-size: 1.35rem; }
.service.featured p { color: var(--ink); max-width: 760px; }

.featured-tag {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-dark);
  background: #fff;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 4px 12px;
}

/* ============ SELECTED WORK ============ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.work-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.work-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 2px 6px rgba(27,42,58,0.08), 0 14px 34px rgba(27,42,58,0.10);
}

.work-card h3 { font-size: 1.18rem; margin-bottom: 4px; }
.work-tagline {
  font-size: 0.82rem !important;
  font-weight: 600;
  color: var(--accent-dark) !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px !important;
}
.work-card p { color: var(--ink-soft); font-size: 0.97rem; margin-bottom: 16px; }

.work-quote {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--ink);
}

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tags li {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 4px 12px;
}

.experience-strip {
  margin-top: 40px;
  background: var(--ink);
  color: #e9eef4;
  border-radius: var(--radius);
  padding: 30px 32px;
}

.experience-strip h3 {
  color: #fff;
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.experience-strip p { color: #c4cedb; max-width: 760px; }

.toolset {
  margin-top: 12px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #8fd4d0 !important;
  letter-spacing: 0.04em;
}

/* ============ PROJECTS ============ */
.project-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.project-card .project-summary {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.project-status {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 3px 11px;
  margin-bottom: 12px;
}

.status-planned     { background: #f3e8d3; color: #8a6210; }
.status-in-progress { background: var(--accent-soft); color: var(--accent-dark); }
.status-completed   { background: #e2efdf; color: #2e6b33; }

.project-link {
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

/* ============ PROCESS / STEPS ============ */
.steps {
  list-style: none;
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 18px;
  margin-top: 36px;
}

.steps li {
  counter-increment: step;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow);
}

.steps li::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.steps h3 { font-size: 1.08rem; margin-bottom: 8px; }
.steps p { color: var(--ink-soft); font-size: 0.93rem; }

.confidentiality {
  margin-top: 40px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 30px 32px;
}

.confidentiality h3 {
  color: var(--accent-dark);
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.confidentiality p { max-width: 800px; color: var(--ink); }

/* ============ ABOUT ============ */
.about-inner { max-width: 720px; }
.about-inner p { color: var(--ink-soft); margin-bottom: 16px; font-size: 1.05rem; }

.about-links {
  display: flex;
  gap: 12px;
  font-weight: 600;
  margin-top: 8px;
}
.about-links span { color: var(--ink-soft); }

/* ============ CONTACT ============ */
.contact {
  background: var(--ink);
  color: #fff;
}

.contact-inner {
  max-width: 680px;
  text-align: center;
}

.contact h2 { color: #fff; margin-bottom: 14px; }
.contact p { color: #c4cedb; margin-bottom: 28px; font-size: 1.08rem; }
.contact .hero-actions { justify-content: center; margin-bottom: 18px; }

.contact-note {
  font-size: 0.88rem !important;
  color: #8fa1b5 !important;
  margin-bottom: 0 !important;
}

/* ============ FOOTER ============ */
.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ============ SCROLL REVEAL ============ */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

/* ============ MOBILE / NARROW ============ */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero-text { max-width: 640px; }
  .hero-demo { max-width: 480px; }
}

@media (max-width: 1020px) {
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 16px;
  }

  .nav-links.open { display: flex; }

  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: 12px 0;
    font-size: 1rem;
  }
  .nav-cta { padding: 10px 18px !important; display: inline-block !important; margin-top: 6px; }

  .hero { padding: 32px 0 40px; }
  .section { padding: 40px 0; }
  .work-grid { grid-template-columns: 1fr; }
}