*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root { --black: #000; --white: #fff; --grey: #e8e8e8; --mid: #888; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background: var(--white); color: var(--black);
  font-size: 16px; line-height: 1.5;
}

/* NAV */
header {
  position: sticky; top: 0; z-index: 100;
  background: var(--white); border-bottom: 1px solid var(--black);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2.5rem; height: 60px;
}
.logo {
  font-size: 1rem; font-weight: 700; letter-spacing: -0.02em;
  text-decoration: none; color: var(--black);
}
nav { display: flex; gap: 2rem; }
nav a {
  text-decoration: none; color: var(--black);
  font-size: 0.875rem; letter-spacing: 0.04em; text-transform: uppercase;
  transition: opacity 0.15s;
}
nav a:hover, nav a.active { opacity: 0.45; }

/* HERO */
.hero { padding: 3.5rem 2.5rem 4rem; border-bottom: 1px solid var(--black); }
.hero h1 {
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  font-weight: 700; letter-spacing: -0.04em; line-height: 1; max-width: 14ch;
}
.hero p { margin-top: 1.25rem; font-size: 1.05rem; color: var(--mid); max-width: 52ch; }
.hero .cta {
  display: inline-block; margin-top: 2.5rem;
  font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; color: var(--black);
  border-bottom: 1px solid var(--black); padding-bottom: 2px;
}

/* CASE LIST */
.section-header { padding: 2.5rem 2.5rem 2rem; border-bottom: 1px solid var(--black); }
.section-header h2 { font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; }
.case-list { list-style: none; }
.case-list li { border-bottom: 1px solid var(--black); }
.case-list li a {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  padding: 2rem 2.5rem; text-decoration: none; color: var(--black);
  transition: background 0.15s;
}
.case-list li a:hover { background: var(--black); color: var(--white); }
.case-list li a:hover .case-num,
.case-list li a:hover .case-desc { color: #aaa; }
.case-list li a:hover .case-tag { border-color: var(--white); color: var(--white); }
.case-info { flex: 1; }
.case-num { font-size: 0.75rem; letter-spacing: 0.08em; color: var(--mid); margin-bottom: 0.3rem; }
.case-title { font-size: clamp(1.25rem, 3vw, 2rem); font-weight: 700; letter-spacing: -0.02em; }
.case-desc { margin-top: 0.35rem; font-size: 0.9rem; color: var(--mid); }
.case-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 0.5rem; }
.case-tag {
  font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase;
  border: 1px solid var(--black); padding: 0.2rem 0.6rem;
  white-space: nowrap;
}
.case-arrow { font-size: 1.25rem; }

/* TESTIMONIALS */
.testimonials { border-bottom: 1px solid var(--black); }
.testimonials .section-header { border-bottom: 1px solid var(--black); }
.testimonial-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
}
.testimonial {
  padding: 2.5rem 2.5rem; border-right: 1px solid var(--black);
}
.testimonial:last-child { border-right: none; }
.testimonial blockquote {
  font-size: 0.95rem; line-height: 1.75; color: #333;
  font-style: normal;
}
.testimonial blockquote::before { content: '\201C'; }
.testimonial blockquote::after { content: '\201D'; }
.testimonial cite {
  display: block; margin-top: 1.25rem;
  font-size: 0.8rem; font-style: normal; font-weight: 600;
}
.testimonial cite span {
  display: block; font-weight: 400; color: var(--mid); margin-top: 0.15rem;
}

/* CASE STUDY PAGE */
.page-hero { padding: 4rem 2.5rem 3.5rem; border-bottom: 1px solid var(--black); }
.back {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase;
  text-decoration: none; color: var(--mid); margin-bottom: 2.5rem;
  transition: color 0.15s; display: block;
}
.back:hover { color: var(--black); }
.page-hero h1 {
  font-size: clamp(2rem, 5vw, 4rem); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.05; max-width: 20ch;
}
.meta-row {
  display: flex; gap: 3rem; margin-top: 2.5rem; padding-top: 2.5rem;
  border-top: 1px solid var(--black); flex-wrap: wrap;
}
.meta-item label {
  display: block; font-size: 0.7rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--mid); margin-bottom: 0.25rem;
}
.meta-item span { font-size: 0.95rem; font-weight: 500; }

/* Case body: sidebar label + content */
.case-body { max-width: 100%; }
.case-row {
  display: grid; grid-template-columns: 220px 1fr;
  border-bottom: 1px solid var(--black);
}
.case-row-label {
  padding: 2.5rem 2.5rem; border-right: 1px solid var(--black);
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--mid); padding-top: 2.75rem;
}
.case-row-content { padding: 2.5rem 2.5rem; }
.case-row-content p {
  font-size: 1rem; line-height: 1.8; color: #222; max-width: 62ch;
}
.case-row-content p + p { margin-top: 1rem; }
.case-row-content ul {
  list-style: square; margin-top: 0.5rem;
}
.case-row-content ul li {
  font-size: 1rem; line-height: 1.8; color: #222;
  padding: 0.4rem 0; border-bottom: 1px solid var(--grey);
  max-width: 62ch;
}
.case-row-content ul li:last-child { border-bottom: none; }
.case-row-content ul li::before { content: ''; }

.case-quote {
  padding: 3rem 2.5rem; border-bottom: 1px solid var(--black);
  background: var(--black); color: var(--white);
}
.case-quote blockquote {
  font-size: clamp(1rem, 2vw, 1.25rem); line-height: 1.7;
  max-width: 60ch; font-style: normal;
}
.case-quote blockquote::before { content: '\201C'; }
.case-quote blockquote::after { content: '\201D'; }
.case-quote cite {
  display: block; margin-top: 1.25rem; font-size: 0.85rem;
  font-style: normal; color: #aaa;
}

.case-awards {
  padding: 2.5rem 2.5rem; border-bottom: 1px solid var(--black);
  display: flex; gap: 2.5rem; flex-wrap: wrap; align-items: flex-start;
}
.award-item { display: flex; flex-direction: column; gap: 0.3rem; }
.award-label {
  font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--mid);
}
.award-name { font-size: 0.9rem; font-weight: 600; max-width: 32ch; }
.award-year { font-size: 0.8rem; color: var(--mid); }

.case-link-row {
  padding: 2.5rem 2.5rem; border-bottom: 1px solid var(--black);
}
.case-link-row a {
  font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; color: var(--black);
  border-bottom: 1px solid var(--black); padding-bottom: 2px;
}
.case-link-row a:hover { opacity: 0.5; }

/* ABOUT PAGE */
.about-intro {
  display: grid; grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--black);
}
.about-left {
  padding: 4rem 2.5rem; border-right: 1px solid var(--black);
}
.about-left h1 {
  font-size: clamp(1.75rem, 3.5vw, 3rem); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 1.75rem;
}
.about-left p {
  font-size: 1rem; line-height: 1.8; color: #333; max-width: 46ch;
}
.about-left p + p { margin-top: 1rem; }
.about-left .cta {
  display: inline-block; margin-top: 2rem;
  font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; color: var(--black);
  border-bottom: 1px solid var(--black); padding-bottom: 2px;
}
.about-right { padding: 4rem 2.5rem; }
.avatar-wrap {
  width: 140px; height: 140px; border-radius: 50%;
  border: 1px solid var(--black); overflow: hidden;
  background: var(--grey); margin-bottom: 2.5rem;
}
.avatar-wrap img { width: 100%; height: 100%; object-fit: cover; }
.avatar-wrap .placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--mid);
}

/* Skills grid */
.skills-section { border-bottom: 1px solid var(--black); }
.skills-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; }
.skills-col { padding: 2.5rem 2.5rem; border-right: 1px solid var(--black); }
.skills-col:last-child { border-right: none; }
.skills-col h3 {
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--mid); margin-bottom: 1.25rem;
}
.skills-col ul { list-style: square; }
.skills-col ul li {
  font-size: 0.9rem; line-height: 1.6; padding: 0.5rem 0;
  border-bottom: 1px solid var(--grey);
}
.skills-col ul li:last-child { border-bottom: none; }

/* Awards & education */
.about-lower { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--black); }
.about-lower-col { padding: 2.5rem 2.5rem; border-right: 1px solid var(--black); }
.about-lower-col:last-child { border-right: none; }
.about-lower-col h3 {
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--mid); margin-bottom: 1.25rem;
}
.about-lower-col ul { list-style: square; }
.about-lower-col ul li {
  font-size: 0.9rem; line-height: 1.6; padding: 0.5rem 0;
  border-bottom: 1px solid var(--grey);
}
.about-lower-col ul li:last-child { border-bottom: none; }
.about-lower-col ul li span { display: block; font-size: 0.8rem; color: var(--mid); }

/* FOOTER */
footer { border-top: 1px solid var(--black); }
.footer-top {
  display: grid; grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--black);
}
.footer-col { padding: 3rem 2.5rem; border-right: 1px solid var(--black); }
.footer-col:last-child { border-right: none; }
.footer-col h4 {
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--mid); margin-bottom: 1.25rem;
}
.footer-col a {
  font-size: 0.9rem; color: var(--black);
  text-decoration: none; display: block; margin-bottom: 0.4rem;
}
.footer-col a:hover { opacity: 0.5; }
.client-logos { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.client-logo {
  width: 88px; height: 38px; border: 1px solid var(--black);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--mid);
}
.footer-bottom {
  padding: 1.25rem 2.5rem; display: flex;
  justify-content: space-between; align-items: center;
  font-size: 0.75rem; color: var(--mid);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .testimonial-grid { grid-template-columns: 1fr; }
  .testimonial { border-right: none; border-bottom: 1px solid var(--black); }
  .testimonial:last-child { border-bottom: none; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .skills-col:nth-child(2) { border-right: none; }
  .skills-col:last-child { grid-column: 1 / -1; border-top: 1px solid var(--black); }
}
@media (max-width: 768px) {
  header { padding: 0 1.25rem; }
  nav { gap: 1.25rem; }
  .hero, .section-header, .page-hero, .footer-col,
  .about-left, .about-right, .skills-col, .about-lower-col,
  .case-row-label, .case-row-content, .case-quote, .case-awards,
  .case-link-row, .testimonial { padding-left: 1.25rem; padding-right: 1.25rem; }
  .case-list li a { padding: 1.5rem 1.25rem; flex-direction: column; gap: 0.75rem; }
  .case-meta { flex-direction: row; align-items: center; }
  .case-row { grid-template-columns: 1fr; }
  .case-row-label { border-right: none; border-bottom: none; padding-bottom: 0; padding-top: 2.5rem; }
  .case-row-content { padding-top: 0.75rem; }
  .about-intro { grid-template-columns: 1fr; }
  .about-left { border-right: none; border-bottom: 1px solid var(--black); }
  .skills-grid { grid-template-columns: 1fr; }
  .skills-col { border-right: none; border-bottom: 1px solid var(--black); }
  .skills-col:last-child { border-bottom: none; }
  .about-lower { grid-template-columns: 1fr; }
  .about-lower-col { border-right: none; border-bottom: 1px solid var(--black); }
  .about-lower-col:last-child { border-bottom: none; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-col { border-right: none; border-bottom: 1px solid var(--black); }
  .footer-col:last-child { border-bottom: none; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .meta-row { gap: 1.5rem; }
}