/* Inference Foundry — site styles */

:root {
  --color-bg: #fafbfc;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #334155;
  --color-heading: #1e3a5f;
  --color-muted: #64748b;
  --color-accent: #0891b2;
  --color-accent-hover: #0e7490;
  --color-accent-soft: rgba(8, 145, 178, 0.08);
  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 24px rgba(15, 23, 42, 0.08);
  --radius: 12px;
  --max: 1120px;
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  position: fixed;
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  margin: 0;
  padding: 0.75rem 1rem;
  overflow: visible;
  clip: auto;
  background: var(--color-accent);
  color: #fff !important;
  text-decoration: none;
  border-radius: 8px;
  z-index: 10001;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-heading);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(250, 251, 252, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
  color: inherit;
}

.brand:hover {
  color: inherit;
}

.brand__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 8px;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand__name {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--color-heading);
}

.brand__tag {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-radius: 8px;
}

.nav a:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent-hover);
}

.nav .btn {
  margin-left: 0.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.125rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.1s ease;
}

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

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

.btn--ghost {
  background: transparent;
  color: var(--color-heading) !important;
  border: 1px solid var(--color-border);
}

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

/* Hero */
.hero {
  padding: clamp(3rem, 8vw, 5rem) 1.5rem clamp(4rem, 10vw, 6rem);
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(8, 145, 178, 0.12), transparent),
    var(--color-bg);
}

.hero__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr 1.05fr;
  }
}

.hero__visual {
  display: flex;
  justify-content: center;
}

.hero__logo-card {
  background: var(--color-surface);
  padding: clamp(1.5rem, 4vw, 2.25rem);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  max-width: 380px;
  width: 100%;
}

.hero__logo-card img {
  width: 100%;
  max-height: 220px;
  object-fit: contain;
}

.hero__content h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-heading);
}

.hero__lead {
  margin: 0 0 1.75rem;
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 36ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Sections */
.section {
  padding: clamp(3rem, 6vw, 5rem) 1.5rem;
}

.section--alt {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section__eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-heading);
}

.section__intro {
  margin: 0 0 2.5rem;
  max-width: 62ch;
  color: var(--color-muted);
}

/* Focus grid */
.focus-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .focus-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.focus-card {
  padding: 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.focus-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-heading);
}

.focus-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

/* Projects */
.project-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  padding: 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
}

.project-card .meta {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.project-card p {
  margin: 0 0 1.25rem;
  flex: 1;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.project-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: auto;
}

.project-card__links a {
  font-size: 0.875rem;
  font-weight: 600;
}

/* Founders */
.founder-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .founder-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.founder-card {
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.founder-card__media {
  width: 88px;
  height: 88px;
  margin-bottom: 1rem;
  border-radius: 50%;
  overflow: hidden;
}

.founder-card__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.founder-card__placeholder {
  display: none;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--color-accent-soft);
  border: 1px solid var(--color-border);
  color: var(--color-heading);
  font-weight: 700;
}

.founder-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.2rem;
  color: var(--color-heading);
}

.founder-card .meta {
  margin: 0 0 0.85rem;
  font-size: 0.86rem;
  color: var(--color-accent);
  font-weight: 600;
}

.founder-card__links {
  margin: 0;
  padding-left: 1rem;
  color: var(--color-muted);
}

.founder-card__links li {
  margin-bottom: 0.3rem;
  font-size: 0.92rem;
}

/* Principles */
.principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.principles li {
  padding: 1.25rem 1.5rem;
  background: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.principles strong {
  color: var(--color-heading);
}

/* CTA band */
.cta {
  text-align: center;
  padding: clamp(3rem, 6vw, 4rem) 1.5rem;
  background: linear-gradient(160deg, #1e3a5f 0%, #0f2744 100%);
  color: #e2e8f0;
}

.cta h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: #fff;
}

.cta p {
  margin: 0 auto 1.5rem;
  max-width: 42ch;
  font-size: 1rem;
  color: #94a3b8;
}

.cta .btn--primary {
  background: #22d3ee;
  color: #0f172a !important;
}

.cta .btn--primary:hover {
  background: #67e8f9;
  color: #0f172a !important;
}

/* Footer */
.site-footer {
  padding: 2.5rem 1.5rem;
  background: #f1f5f9;
  border-top: 1px solid var(--color-border);
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
  text-align: center;
}

@media (min-width: 640px) {
  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    align-items: flex-start;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 6px;
}

.footer-brand span {
  font-weight: 600;
  color: var(--color-heading);
  font-size: 0.9375rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  font-size: 0.875rem;
  font-weight: 500;
}

.site-footer__copy {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin: 0;
}