/* Joseph Calderon — Portfolio
   Clean minimal. Instrument Serif (display) + Inter (body).
   Accent: green (#16a34a) — bridges biology and DeFi.
*/

/* ── Tokens ────────────────────────────────────────── */

:root {
  --bg:       #ffffff;
  --ink:      #111111;
  --muted:    #6b7280;
  --border:   #e5e7eb;
  --green:    #16a34a;
  --green-lt: #f0fdf4;

  --serif: "Instrument Serif", Georgia, serif;
  --sans:  "Inter", system-ui, -apple-system, sans-serif;

  --max-w:  760px;
  --nav-h:  60px;

  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ── Reset ─────────────────────────────────────────── */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--green);
  color: #fff;
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration: none;
}

/* ── Nav ───────────────────────────────────────────── */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.nav-brand {
  font-family: var(--sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.nav-brand:hover { color: var(--green); }

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
}

/* ── Hero ──────────────────────────────────────────── */

.hero {
  padding-top: calc(var(--nav-h) + 6rem);
  padding-bottom: 6rem;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-name {
  font-family: var(--serif);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 1.75rem;
}

.hero-domains {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--green);
  margin-bottom: 1.25rem;
}

.hero-tagline {
  font-size: 1.125rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 46ch;
}

.br-desktop { display: none; }

/* ── Sections ──────────────────────────────────────── */

.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4.5rem 1.5rem;
  border-top: 1px solid var(--border);
}

.section-layout {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 3rem;
  align-items: start;
}

.section-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--green);
  padding-top: 0.25rem;
}

.section-content p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.75;
  max-width: 52ch;
  margin-bottom: 1rem;
}

.section-content p:last-child {
  margin-bottom: 0;
}

/* ── Projects ──────────────────────────────────────── */

.project-list {
  display: flex;
  flex-direction: column;
}

.project-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.project-item:first-child {
  border-top: 1px solid var(--border);
}

.project-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.project-meta h3 {
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.3;
}

.project-tags {
  display: flex;
  gap: 0.375rem;
  flex-shrink: 0;
}

.tag {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.5rem;
  background: var(--green-lt);
  color: var(--green);
  border-radius: 2px;
}

.project-item p {
  font-size: 0.9375rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 52ch;
  margin: 0;
}

/* ── All Projects Link ─────────────────────────────── */

.pcard-problem-label {
  display: inline;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--green);
  margin-right: 0.5rem;
}

.pcard-link {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--green);
  transition: opacity 0.15s ease;
}

.pcard-link:hover { opacity: 0.7; }

.all-projects-link {
  display: inline-block;
  margin-top: 1.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--green);
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.all-projects-link:hover {
  opacity: 0.7;
}

/* ── Contact ───────────────────────────────────────── */

.contact-intro {
  margin-bottom: 2rem !important;
}

.contact-socials {
  display: flex;
  flex-direction: column;
}

.contact-socials a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.contact-socials a:first-child {
  border-top: 1px solid var(--border);
}

.contact-socials a svg {
  flex-shrink: 0;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.contact-socials a:hover {
  color: var(--ink);
}

.contact-socials a:hover svg {
  color: var(--green);
}


/* ── Footer ────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-footer p {
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ── Scroll Animations ─────────────────────────────── */

[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

[data-animate].animate-in {
  opacity: 1;
  transform: translateY(0);
}

[data-animate-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

[data-animate-stagger].animate-in > * { opacity: 1; transform: translateY(0); }
[data-animate-stagger].animate-in > *:nth-child(1) { transition-delay:   0ms; }
[data-animate-stagger].animate-in > *:nth-child(2) { transition-delay:  80ms; }
[data-animate-stagger].animate-in > *:nth-child(3) { transition-delay: 160ms; }
[data-animate-stagger].animate-in > *:nth-child(4) { transition-delay: 240ms; }

/* ── Reduced Motion ────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-animate],
  [data-animate-stagger] > * {
    opacity: 1;
    transform: none;
  }
}

/* ── Responsive ────────────────────────────────────── */

@media (min-width: 640px) {
  .br-desktop { display: inline; }
}

@media (max-width: 600px) {
  .section-layout {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .project-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .hero {
    padding-top: calc(var(--nav-h) + 3.5rem);
    padding-bottom: 3.5rem;
  }

  .section {
    padding: 3rem 1.5rem;
  }
}

@media (max-width: 400px) {
  .nav-links {
    gap: 1.25rem;
  }
}