/* ---------- Design tokens ---------- */
:root {
  --color-bg: #FAF8F4;
  --color-bg-alt: #F1EDE3;
  --color-surface: #FFFFFF;
  --color-ink: #16181D;
  --color-ink-soft: #5B5F6B;
  --color-ink-faint: #8B8E97;
  --color-accent: #3A4FE8;
  --color-accent-ink: #1E2B99;
  --color-accent-soft: #E7EAFC;
  --color-warm: #E0632B;
  --color-border: #E6E1D4;

  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container-width: 1180px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --shadow-card: 0 1px 2px rgba(22, 24, 29, 0.04), 0 12px 28px -12px rgba(22, 24, 29, 0.12);
  --shadow-card-hover: 0 1px 2px rgba(22, 24, 29, 0.06), 0 24px 40px -16px rgba(22, 24, 29, 0.2);
}

/* ---------- Reset & base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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; }

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; color: var(--color-ink-soft); }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--color-ink);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  z-index: 200;
}

section { padding: clamp(3.5rem, 7vw, 6.5rem) 0; }
.section-alt { background: var(--color-bg-alt); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.8rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn-primary {
  background: var(--color-ink);
  color: white;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-card-hover); }
.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border: 1.5px solid var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-ink); transform: translateY(-2px); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 244, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.is-scrolled {
  background: rgba(250, 248, 244, 0.92);
  border-bottom-color: var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
}
.logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}
.nav-links { display: flex; align-items: center; gap: 1.8rem; font-size: 0.92rem; font-weight: 500; }
.nav-links a:not(.nav-cta) { color: var(--color-ink-soft); transition: color 0.2s ease; }
.nav-links a:not(.nav-cta):hover { color: var(--color-ink); }
.nav-cta {
  background: var(--color-ink);
  color: white !important;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
}
.nav-back { font-size: 0.92rem; font-weight: 500; color: var(--color-ink-soft); }
.nav-back:hover { color: var(--color-ink); }

/* ---------- Hero ---------- */
.hero { padding-top: clamp(3rem, 8vw, 5rem); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}
.hero-text h1 { font-size: clamp(2.6rem, 5.5vw, 4.2rem); }
.hero-role {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: var(--color-accent-ink);
  margin-bottom: 1.2rem;
}
.hero-sub { font-size: 1.08rem; max-width: 46ch; }
.hero-actions { display: flex; gap: 1rem; margin-top: 1.8rem; flex-wrap: wrap; }

.hero-photo { position: relative; justify-self: center; width: min(320px, 80%); }
.hero-photo-blob {
  position: absolute;
  inset: -12%;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-warm) 100%);
  opacity: 0.35;
  filter: blur(6px);
  animation: blobMorph 12s ease-in-out infinite;
  z-index: 0;
}
.hero-photo img {
  position: relative;
  z-index: 1;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 6px solid var(--color-surface);
  box-shadow: var(--shadow-card);
}
@keyframes blobMorph {
  0%, 100% { border-radius: 42% 58% 65% 35% / 45% 45% 55% 55%; transform: rotate(0deg) scale(1); }
  33% { border-radius: 65% 35% 40% 60% / 55% 65% 35% 45%; transform: rotate(8deg) scale(1.03); }
  66% { border-radius: 35% 65% 55% 45% / 65% 35% 65% 35%; transform: rotate(-6deg) scale(0.98); }
}
.client-strip {
  margin-top: clamp(3rem, 6vw, 4.5rem);
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2.2rem;
  color: var(--color-ink-faint);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---------- Grids & cards ---------- */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }

.highlight-card, .project-card, .capability-group, .timeline-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.8rem;
}

.case-study-grid { display: grid; gap: 1.5rem; margin-top: 2rem; }
.case-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.case-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}
.case-card h3 { font-size: 1.5rem; margin-bottom: 0.6rem; }
.case-card .case-arrow { color: var(--color-ink); font-weight: 600; }

.project-card { transition: transform 0.25s ease, box-shadow 0.25s ease; }
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.project-meta { font-size: 0.85rem; color: var(--color-ink-faint); margin-bottom: 0.8rem; }
.project-card a { font-weight: 600; color: var(--color-accent-ink); }

.section-head { max-width: 60ch; margin-bottom: 2.5rem; }
.section-head p { font-size: 1.05rem; }

/* ---------- Capabilities ---------- */
.capabilities-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 2rem; }
.capability-group ul { padding: 0; margin: 0; list-style: none; }
.capability-group li {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-ink-soft);
  font-size: 0.96rem;
}
.capability-group li:last-child { border-bottom: none; }

/* ---------- Timeline ---------- */
.timeline { display: grid; gap: 1.2rem; margin-top: 1.5rem; margin-bottom: 3rem; }
.timeline-meta { font-size: 0.88rem; color: var(--color-ink-faint); margin-bottom: 0.6rem; }
.education-heading { margin-top: 1rem; }
.certs {
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  padding: 1.8rem;
}
.certs h3 { margin-bottom: 0.6rem; }
.certs p { color: var(--color-accent-ink); margin: 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-ink); color: white; padding: clamp(3.5rem, 7vw, 6rem) 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 2rem; align-items: center; padding-bottom: 3rem; border-bottom: 1px solid rgba(255,255,255,0.12); }
.site-footer h2 { color: white; font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
.site-footer p { color: rgba(255,255,255,0.65); }
.footer-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.site-footer .btn-primary { background: white; color: var(--color-ink); }
.site-footer .btn-secondary { border-color: rgba(255,255,255,0.3); color: white; }
.site-footer .btn-secondary:hover { border-color: white; }
.footer-bottom { padding-top: 1.6rem; font-size: 0.85rem; color: rgba(255,255,255,0.45); }
.footer-bottom p { margin: 0; color: inherit; }

/* ---------- Case study pages ---------- */
.case-hero { padding-top: clamp(2.5rem, 6vw, 4rem); }
.back-link { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--color-ink-soft); font-weight: 500; margin-bottom: 2rem; }
.back-link:hover { color: var(--color-ink); }
.case-hero h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); max-width: 26ch; }
.case-meta-row { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1.6rem; }
.case-hero .hero-sub { font-size: 1.15rem; max-width: 56ch; }

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; margin: 2.5rem 0; }
.stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.5rem; text-align: center; }
.stat-number { font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.4rem); color: var(--color-accent-ink); display: block; }
.stat-label { font-size: 0.85rem; color: var(--color-ink-faint); }

.case-section { max-width: 72ch; margin: 0 auto; padding: 2.8rem 0; border-top: 1px solid var(--color-border); }
.case-section:first-of-type { border-top: none; }
.case-section .eyebrow { margin-bottom: 0.8rem; }
.case-section ul { padding-left: 1.2rem; }
.case-section li { color: var(--color-ink-soft); margin-bottom: 0.5rem; }

.case-nav-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 72ch;
  margin: 0 auto;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: left; }
  .hero-photo { width: min(220px, 60%); justify-self: start; margin-top: 1rem; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .capabilities-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; text-align: left; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .nav-links { gap: 1rem; }
  .nav-links a:not(.nav-cta) { display: none; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .stat-row { grid-template-columns: 1fr 1fr; }
}