/* ===== Layout primitives ===== */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-10));
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  z-index: 100;
}
.skip:focus { left: var(--space-4); top: var(--space-4); }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-divider);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding-block: var(--space-4);
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.375rem;
  letter-spacing: -0.01em;
}
.brand .logo {
  color: var(--color-primary);
  transform: translateY(4px);
}
.brand-suffix {
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 500;
}
.site-nav {
  display: flex;
  gap: var(--space-6);
  margin-inline: auto;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.site-nav a { position: relative; padding-block: var(--space-1); }
.site-nav a:hover { color: var(--color-text); }
.site-nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-interactive);
}
.site-nav a:hover::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.theme-toggle {
  width: 36px; height: 36px;
  display: inline-grid;
  place-items: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-divider);
}

@media (max-width: 780px) {
  .site-nav { display: none; }
  .brand-suffix { display: none; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-sm { padding: var(--space-2) var(--space-4); }
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-ghost {
  color: var(--color-text);
  border-color: var(--color-border);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-onDark {
  background: var(--color-text-inverse);
  color: var(--color-primary-active);
}
.btn-onDark:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-ghost-onDark {
  color: var(--color-text-inverse);
  border-color: color-mix(in oklab, var(--color-text-inverse) 30%, transparent);
}
.btn-ghost-onDark:hover {
  border-color: var(--color-text-inverse);
  background: color-mix(in oklab, var(--color-text-inverse) 10%, transparent);
}

/* ===== Common section styling ===== */
.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.section-quiet {
  background: var(--color-surface-offset);
  border-block: 1px solid var(--color-divider);
}
.section-head {
  max-width: 640px;
  margin-bottom: clamp(var(--space-10), 6vw, var(--space-16));
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.section-kicker.on-dark { color: color-mix(in oklab, var(--color-text-inverse) 80%, var(--color-primary) 20%); }
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.015em;
  line-height: 1.05;
  color: var(--color-text);
}
.section-sub {
  margin-top: var(--space-5);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(var(--space-16), 10vw, var(--space-32));
  padding-bottom: clamp(var(--space-16), 10vw, var(--space-32));
  background:
    radial-gradient(1200px 500px at 85% -10%, color-mix(in oklab, var(--color-primary) 12%, transparent), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, color-mix(in oklab, var(--color-accent) 10%, transparent), transparent 60%),
    var(--color-bg);
}
.hero::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--color-divider);
}
.hero-inner {
  max-width: 1000px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--color-surface) 75%, transparent);
  margin-bottom: var(--space-8);
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--color-primary) 20%, transparent);
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 1rem + 5.5vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--color-text);
  max-width: 20ch;
}
.hero-title em {
  color: var(--color-primary);
  font-style: italic;
}
.hero-lede {
  margin-top: var(--space-8);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.55;
}
.hero-cta {
  margin-top: var(--space-10);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.hero-meta {
  margin-top: clamp(var(--space-12), 8vw, var(--space-20));
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.hero-meta dt {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}
.hero-meta dd {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}
.service {
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform var(--transition-interactive), border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.service:hover {
  transform: translateY(-3px);
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}
.service-num {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}
.service h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.service p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px dashed var(--color-divider);
}
.tag-list li {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
}

/* ===== Approach ===== */
.approach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: start;
}
@media (max-width: 860px) {
  .approach-grid { grid-template-columns: 1fr; }
}
.approach-copy p {
  color: var(--color-text-muted);
  margin-top: var(--space-5);
}
.principles {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}
.principles-title {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-6);
}
.principles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.principles-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: var(--space-3);
  align-items: baseline;
  color: var(--color-text-muted);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-divider);
}
.principles-list li:last-child { border-bottom: none; padding-bottom: 0; }
.principles-list strong { color: var(--color-text); font-weight: 600; }
.principles-num {
  font-family: var(--font-display);
  color: var(--color-primary);
  font-style: italic;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(var(--space-10), 6vw, var(--space-20));
  align-items: start;
}
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
}
.about-copy p { color: var(--color-text-muted); }
.about-copy p + p { margin-top: var(--space-4); }
.fact-list {
  list-style: none;
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.fact-list li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
}
.fact-list li span:first-child {
  color: var(--color-text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
}
.fact-list li span:last-child { color: var(--color-text); text-align: right; }

/* ===== CTA ===== */
.section-cta {
  background:
    radial-gradient(700px 300px at 20% 20%, color-mix(in oklab, var(--color-accent) 18%, transparent), transparent 70%),
    var(--color-primary-active);
  color: var(--color-text-inverse);
}
[data-theme='dark'] .section-cta {
  background:
    radial-gradient(700px 300px at 20% 20%, color-mix(in oklab, var(--color-accent) 25%, transparent), transparent 70%),
    #1a2a24;
}
.cta-inner {
  max-width: 720px;
  text-align: center;
  margin-inline: auto;
}
.cta-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.02em;
  color: var(--color-text-inverse);
  margin-bottom: var(--space-5);
}
.cta-sub {
  color: color-mix(in oklab, var(--color-text-inverse) 75%, transparent);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}
.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-10);
  background: var(--color-surface);
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-6);
  align-items: center;
}
@media (max-width: 780px) {
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 1.0625rem;
}
.footer-brand span { color: var(--color-text); }
.footer-meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
}
.footer-nav {
  display: flex;
  gap: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  justify-content: flex-end;
}
@media (max-width: 780px) { .footer-nav { justify-content: center; } }
.footer-nav a:hover { color: var(--color-text); }

/* ===== Reveal on scroll ===== */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 700ms cubic-bezier(0.16,1,0.3,1), transform 700ms cubic-bezier(0.16,1,0.3,1); }
.reveal.is-in { opacity: 1; transform: none; }