/* ============================================================
   PERSONAL SITE — BRIAN GOODELL
   Editorial / research-notebook aesthetic. Warm paper, deep
   ink, forest fern, olive moss. Newsreader serif + IBM
   Plex Sans + JetBrains Mono for monospaced editorial labels.
   ============================================================ */

:root {
  /* Palette ------------------------------------------------- */
  --paper:        #E7E3D4;
  --paper-2:      #DFDABD;
  --paper-3:      #F0ECDE;
  --surface:      #EDE9D8;
  --rule:         #C7BCAB;
  --rule-soft:    #D5CDB6;

  --ink:          #1F1812;
  --ink-2:        #3A3026;
  --ink-mute:     #7A6B53;
  --ink-faint:    #9B8E72;

  --fern:         #4A6741;   /* forest green */
  --fern-deep:    #354B30;
  --fern-soft:    #7D9E70;

  --moss:         #5E6B3C;   /* olive secondary */
  --moss-soft:    #8A9764;

  --paper-on-ink: #F1E7D2;

  /* Placeholder duotone fills */
  --ph-clay:    #4A6741;
  --ph-moss:    #5E6B3C;
  --ph-umber:   #7A4E2C;
  --ph-sand:    #BFA476;

  /* Legacy aliases (used by inline style attrs in HTML) */
  --ph-brown:   var(--ph-umber);
  --ph-sage:    var(--ph-moss);
  --ph-terra:   var(--ph-clay);
  --color-accent: var(--fern);
  --color-accent-hover: var(--fern-deep);
  --color-accent-light: var(--fern-soft);
  --color-border: var(--rule);
  --color-bg-alt: var(--paper-2);
  --color-surface: var(--surface);
  --color-text-body: var(--ink-2);
  --color-text-muted: var(--ink-mute);
  --color-text-primary: var(--ink);
  --color-secondary: var(--moss);
  --color-secondary-lt: var(--moss-soft);

  /* Typography ---------------------------------------------- */
  --font-serif: 'Newsreader', 'Source Serif 4', Georgia, serif;
  --font-sans:  'IBM Plex Sans', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  --font-mono:  'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Menlo, monospace;
  --font-heading: var(--font-serif);
  --font-body:    var(--font-sans);

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1.0625rem;
  --text-lg:   1.1875rem;
  --text-xl:   1.375rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.25rem;
  --text-4xl:  3rem;
  --text-5xl:  4rem;

  --leading-tight:  1.12;
  --leading-snug:   1.3;
  --leading-normal: 1.55;
  --leading-loose:  1.7;

  /* Spacing ------------------------------------------------- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout -------------------------------------------------- */
  --max-content: 720px;
  --max-wide:    1120px;
  --nav-height:  68px;

  /* Effects ------------------------------------------------- */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --transition-fast: 140ms ease;
  --transition-base: 240ms cubic-bezier(.2,.6,.2,1);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  scrollbar-width: none;
}

::-webkit-scrollbar { display: none; }

body {
  background: var(--paper);
  color: var(--ink-2);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-feature-settings: "ss01", "cv01";
}

/* Soft paper grain — barely perceptible warm noise.
   Pure CSS, no external image. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(rgba(45, 45, 30, 0.04) 1px, transparent 1px);
  background-size: 3px 3px;
  mix-blend-mode: multiply;
  opacity: 0.55;
}

main { flex: 1; position: relative; z-index: 1; }

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

a {
  color: var(--fern);
  font-weight: 500;
  text-decoration: none;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: color var(--transition-fast);
}

a:hover { color: var(--fern-deep); text-decoration: underline; }

a:focus-visible {
  outline: 2px solid var(--fern);
  outline-offset: 3px;
  border-radius: 1px;
}

::selection { background: var(--fern-soft); color: var(--ink); }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--ink);
  line-height: var(--leading-tight);
  font-weight: 500;
  letter-spacing: -0.01em;
  text-wrap: balance;
  font-optical-sizing: auto;
}

em { font-style: italic; }
h1 em, h2 em, h3 em { font-style: italic; color: var(--fern-deep); }

/* Editorial monospace kicker: tiny uppercase mono label.
   Use above headings for an "00.0 Section" feel. */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.kicker::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 1px;
  background: var(--fern);
}

.kicker--no-rule::before { display: none; }

.page-title {
  font-size: clamp(2.2rem, 4.6vw, var(--text-4xl));
  font-weight: 500;
  margin-top: var(--space-3);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  font-weight: 500;
  margin-bottom: var(--space-6);
}

.page-intro {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  line-height: var(--leading-loose);
  color: var(--ink-2);
  font-weight: 400;
  max-width: 60ch;
}

.section-heading {
  font-size: var(--text-2xl);
  font-weight: 500;
  margin-bottom: var(--space-6);
  letter-spacing: -0.015em;
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */
.content-section {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
}

.wide-section {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
}

/* Soft horizontal rule used between sections */
.rule {
  border: 0;
  height: 1px;
  background: var(--rule);
  max-width: var(--max-content);
  margin: 0 auto;
}

.rule--wide { max-width: var(--max-wide); }

/* ============================================================
   PLACEHOLDER IMAGES
   Subtle striped duotone — feels like a scan / a sample,
   not just a flat color block.
   ============================================================ */
.ph-image {
  --ph-fill: var(--ph-umber);
  position: relative;
  width: 100%;
  padding-bottom: var(--ph-ratio, 66.67%);
  overflow: hidden;
  border-radius: var(--radius-sm);
  background:
    repeating-linear-gradient(
      135deg,
      rgba(255, 246, 224, 0.10) 0 6px,
      rgba(0, 0, 0, 0.06) 6px 12px
    ),
    var(--ph-fill);
  isolation: isolate;
}

.ph-image::before {
  /* tiny mono coordinate tick in the corner — research notebook vibe */
  content: "";
  position: absolute;
  inset: 10px 10px auto auto;
  width: 14px;
  height: 14px;
  border-top: 1px solid rgba(255, 246, 224, 0.55);
  border-right: 1px solid rgba(255, 246, 224, 0.55);
  z-index: 2;
}

.ph-image::after {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: rgba(255, 246, 224, 0.85);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  z-index: 2;
}

.ph-image--fixed { padding-bottom: 0; }

/* ============================================================
   BUTTONS — text-forward, editorial
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.55em 1em;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.btn:hover { text-decoration: none; }

.btn--primary {
  background: var(--ink);
  color: var(--paper-on-ink);
  border-color: var(--ink);
}
.btn--primary:hover { background: var(--fern-deep); border-color: var(--fern-deep); color: #fff; }

.btn--outline {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}
.btn--outline:hover { background: var(--ink); color: var(--paper-on-ink); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule);
}
.btn--ghost:hover { border-color: var(--ink); color: var(--ink); background: var(--paper-3); }

.btn--sm { padding: 0.4em 0.75em; font-size: var(--text-xs); }

.btn .btn__arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}
.btn:hover .btn__arrow { transform: translate(2px, -2px); }

/* ============================================================
   NAVIGATION — paper-toned, editorial masthead
   ============================================================ */
.site-nav {
  background: var(--paper);
  height: var(--nav-height);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--rule);
  backdrop-filter: saturate(120%);
}

.site-nav__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  min-width: 0;
}

.site-nav__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55em;
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
  min-width: 0;
}

.site-nav__brand > span { white-space: nowrap; }

.site-nav__brand:hover { color: var(--fern-deep); text-decoration: none; }

.site-nav__brand-mark {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--fern);
  border-radius: 50%;
  transform: translateY(-1px);
}

.site-nav__brand-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border-left: 1px solid var(--rule);
  padding-left: 0.7em;
  margin-left: 0.2em;
}

@media (max-width: 860px) {
  .site-nav__brand-meta { display: none; }
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--ink-mute);
  text-decoration: none;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.3em 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link:hover { color: var(--ink); text-decoration: none; }

.nav__link--active { color: var(--ink); }
.nav__link--active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--fern);
}

/* Social icons — sit in the nav, after the page links */
.site-nav__socials {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-left: var(--space-5);
  margin-left: var(--space-2);
  border-left: 1px solid var(--rule);
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: var(--ink-mute);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.social-icon svg {
  width: 16px;
  height: 16px;
  display: block;
}

.social-icon:hover {
  color: var(--fern-deep);
  background: var(--paper-3);
  text-decoration: none;
}

.social-icon:focus-visible {
  outline: 2px solid var(--fern);
  outline-offset: 2px;
}

@media (max-width: 540px) {
  .site-nav__socials {
    padding-left: var(--space-3);
    margin-left: 0;
    gap: var(--space-2);
  }
  .social-icon { width: 24px; height: 24px; }
  .social-icon svg { width: 14px; height: 14px; }
}

.nav-short { display: none; }
@media (max-width: 540px) {
  .nav-full  { display: none; }
  .nav-short { display: inline; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: transparent;
  color: var(--ink-2);
  padding: var(--space-10) var(--space-6) var(--space-8);
  margin-top: var(--space-16);
  border-top: 1px solid var(--rule);
}

.site-footer__inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-5);
}

.site-footer__meta {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.55em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  line-height: 1.4;
}

.site-footer__brand {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.005em;
  text-transform: none;
  line-height: 1;
}

.site-footer__brand em {
  font-style: italic;
  color: var(--fern-deep);
  font-weight: 500;
}

.site-footer__sep {
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.site-footer__copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: var(--space-2);
}

.site-footer__links {
  display: flex;
  gap: var(--space-5);
}

.footer-link {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--rule);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.footer-link:hover { color: var(--fern-deep); border-color: var(--fern); text-decoration: none; }

@media (max-width: 640px) {
  .site-footer__inner { flex-direction: column; align-items: flex-start; gap: var(--space-3); }
}

/* ============================================================
   HOME PAGE — asymmetric editorial hero
   ============================================================ */

/* Home page only: wider content rail + tighter vertical rhythm,
   so the whole bio + links fit much closer to the fold. */
body[data-page-id="home"] .content-section {
  max-width: 860px;
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

body[data-page-id="home"] .home-bio { padding-top: 0; padding-bottom: var(--space-4); }
body[data-page-id="home"] .home-links { padding-top: var(--space-2); padding-bottom: var(--space-10); }
body[data-page-id="home"] .site-footer { margin-top: var(--space-8); }

.home-hero {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-10) var(--space-6) var(--space-6);
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-10);
  align-items: center;
}

.home-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: var(--space-4);
}

.home-hero__eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 0 4px rgba(94, 107, 60, 0.18);
  animation: livepulse 2.6s ease-in-out infinite;
}

@keyframes livepulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(94, 107, 60, 0.18); }
  50%      { box-shadow: 0 0 0 6px rgba(94, 107, 60, 0.05); }
}

.home-hero__name {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6.5vw, 4.25rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: var(--space-3);
}

.home-hero__name em {
  font-style: italic;
  font-weight: 400;
  color: var(--fern-deep);
}

.home-hero__role {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--ink-2);
  line-height: var(--leading-snug);
  max-width: 30ch;
}

.home-hero__role b {
  font-style: normal;
  font-weight: 500;
  font-family: var(--font-sans);
}

.home-hero__photo-wrap {
  width: 100%;
  /* aspect-ratio: 4 / 5; */
  overflow: hidden;
  border-radius: 2px;
  position: relative;
  background: var(--paper-2);
  border: 4px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    0 1px 3px rgba(31, 24, 18, 0.08),
    0 6px 20px rgba(31, 24, 18, 0.13);
}

/* Soft inset vignette — darkens edges slightly, adds depth without fading */
.home-hero__photo-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 28px rgba(31, 24, 18, 0.18);
  border-radius: 2px;
  pointer-events: none;
  z-index: 1;
}

.home-hero__photo-wrap .ph-image {
  border-radius: 0;
  padding-bottom: 0;
  position: absolute;
  inset: 0;
}

.home-hero__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 75% 20%;
}

.home-bio {
  padding-top: 0;
  padding-bottom: var(--space-8);
}

.home-bio__para {
  font-size: var(--text-lg);
  line-height: 1.6;
  max-width: 65ch;
  color: var(--ink-2);
}

.home-bio__para + .home-bio__para { margin-top: var(--space-4); }
.home-bio__para em { color: var(--ink); }

/* "Explore" link list — strip card-y chrome, lean on rules + type */
.home-links { padding-top: var(--space-4); padding-bottom: var(--space-12); }

.home-links__grid {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule);
}

.link-card {
  display: grid;
  grid-template-columns: 2.5em 1fr auto;
  align-items: baseline;
  gap: var(--space-5);
  padding: var(--space-4) var(--space-2);
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  position: relative;
  transition: padding var(--transition-base), background var(--transition-base);
}

.link-card::before {
  /* numerical index */
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  align-self: center;
}

.link-card:hover {
  text-decoration: none;
  padding-left: var(--space-4);
  background: linear-gradient(90deg, var(--paper-3), transparent 60%);
}

.link-card:hover .link-card__arrow { transform: translate(4px, -4px); color: var(--fern-deep); }
.link-card:hover .link-card__title { color: var(--fern-deep); }

.link-card__title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.015em;
  transition: color var(--transition-fast);
}

.link-card__desc {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--ink-mute);
  line-height: var(--leading-normal);
  grid-column: 2 / 3;
  max-width: 50ch;
}

.link-card__arrow {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--ink-faint);
  align-self: center;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.link-card__title-link {
  display: contents;
}

.link-card__sublinks {
  grid-column: 2 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-bottom: var(--space-1);
}

.link-card__sublink {
  display: inline-flex;
  align-items: center;
  gap: 0.25em;
  padding: 0.2em 0.7em;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--fern-deep);
  border: 1px solid currentColor;
  border-radius: 999px;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.link-card__sublink::after {
  content: '↗';
  font-size: 0.85em;
  opacity: 0.7;
}

.link-card__sublink:hover {
  background: var(--fern-deep);
  color: white;
  border-color: var(--fern-deep);
  text-decoration: none;
}

@media (max-width: 600px) {
  .link-card {
    grid-template-columns: 2em 1fr auto;
    gap: var(--space-3);
    padding: var(--space-4) 0;
  }
  .link-card__title { font-size: var(--text-xl); }
  .link-card__desc  { grid-column: 1 / -1; }
  .link-card__sublinks { grid-column: 1 / -1; }
}

/* ============================================================
   PAGE HEADER (shared on lab / projects / hobbies pages)
   ============================================================ */
.page-header {
  padding-bottom: var(--space-4);
}

.page-header .page-intro {
  margin-top: var(--space-4);
}

/* ============================================================
   FLAVELL LAB PAGE
   ============================================================ */
.lab-project {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: var(--space-16) var(--space-6) var(--space-12);
  border-top: 1px solid var(--rule);
  position: relative;
}

/* Project number label set in the gutter */
.lab-project__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: block;
  margin-bottom: var(--space-3);
}

.lab-project__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.lab-project__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.015em;
}

.lab-project__links {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
}

.lab-project__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

.lab-project__photo-wrap { overflow: hidden; }

/* ── Before/After image comparison slider ─────────────────── */
.img-compare {
  position: relative;
  overflow: hidden;
  cursor: ew-resize;
  border-radius: var(--radius-sm);
  user-select: none;
  -webkit-user-select: none;
  display: block;
  line-height: 0;
}

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

.img-compare__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  clip-path: inset(0 calc(100% - var(--x, 50%)) 0 0);
  will-change: clip-path;
}

.img-compare__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--x, 50%);
  transform: translateX(-50%);
  width: 1.5px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.img-compare__divider::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 20 20' fill='none' stroke='%23555' stroke-width='1.5' stroke-linecap='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 8l-3 2 3 2M13 8l3 2-3 2'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 18px 18px;
}

.img-compare__labels {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: var(--space-3) var(--space-3);
  pointer-events: none;
}

.img-compare__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(0, 0, 0, 0.38);
  padding: 2px 7px;
  border-radius: 2px;
  line-height: 1.6;
  backdrop-filter: blur(4px);
}

.lab-project__text p {
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  margin-bottom: var(--space-4);
  color: var(--ink-2);
}

.lab-project__tech-list {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.lab-project__tech-list li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-2);
  line-height: var(--leading-normal);
  position: relative;
  padding-left: 1.5em;
  letter-spacing: 0.01em;
}

.lab-project__tech-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--fern);
  font-family: var(--font-mono);
}

/* ============================================================
   PROJECTS PAGE
   ============================================================ */
.page-projects .page-header {
  max-width: var(--max-wide);
  padding: var(--space-16) var(--space-6) var(--space-8);
  margin: 0 auto;
}

.page-projects .page-header .page-intro { max-width: 60ch; }

.project-filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--rule);
}

.filter-btn {
  padding: 0.4em 0.9em;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-2);
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.filter-btn:hover { border-color: var(--ink); color: var(--ink); }

.filter-btn--active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper-on-ink);
}

.filter-btn--active:hover {
  background: var(--fern-deep);
  border-color: var(--fern-deep);
  color: var(--paper-on-ink);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-8) var(--space-6);
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) var(--space-16);
}

.project-card {
  background: transparent;
  border: none;
  overflow: visible;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  z-index: 1;
  transition: transform var(--transition-base);
}

.project-card:hover,
.project-card:focus-within { z-index: 60; }
.project-card:hover { transform: translateY(-2px); }
.project-card[data-hidden="true"] { display: none; }

@keyframes card-highlight {
  0%, 25% {
    outline: 2px solid var(--fern);
    outline-offset: 4px;
    background-color: rgba(74, 103, 65, 0.05);
  }
  100% {
    outline: 2px solid transparent;
    outline-offset: 4px;
    background-color: transparent;
  }
}

.project-card--highlight {
  animation: card-highlight 2.4s ease-out forwards;
}

/* Stretched link — makes the whole card clickable */
.project-card__primary-link::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
}

/* Keep interactive elements above the card overlay */
.project-card .ai-meter,
.project-card__actions .btn {
  position: relative;
  z-index: 2;
}

/* Pointer cursor on the card itself when it has a link */
.project-card:has(.project-card__primary-link) { cursor: pointer; }

/* When a meter inside the card has an open popover, keep its card on top */
.project-card:has(.ai-meter:hover),
.project-card:has(.ai-meter.is-open),
.project-card:has(.ai-meter:focus-visible) { z-index: 80; }

/* Boost the active meter above the action buttons (both z-index:2, later DOM order wins) */
.project-card .ai-meter:hover,
.project-card .ai-meter:focus-visible,
.project-card .ai-meter.is-open {
  z-index: 10;
}

.lab-project { z-index: 1; }
.lab-project:has(.ai-meter:hover),
.lab-project:has(.ai-meter.is-open),
.lab-project:has(.ai-meter:focus-visible) { z-index: 80; position: relative; }

.project-card__img-wrap {
  height: 180px;
  overflow: hidden;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--rule);
}

.project-card__img-wrap .ph-image {
  height: 100%;
  padding-bottom: 0;
  border-radius: 0;
}

.project-card__img { width: 100%; height: 100%; object-fit: cover; }

.project-card__body {
  padding: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.project-card__name {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--ink);
  line-height: var(--leading-snug);
  letter-spacing: -0.01em;
}

.project-card__desc {
  font-size: var(--text-sm);
  color: var(--ink-mute);
  line-height: var(--leading-normal);
  flex: 1;
}

.project-card__footer {
  padding: var(--space-3) 0;
  margin-top: var(--space-2);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.project-card__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.project-card__badges {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Badge — minimal pill, mono caps */
.project-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.project-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-faint);
}

.project-badge--work::before  { background: var(--fern); }
.project-badge--class::before { background: var(--moss); }
.project-badge--solo::before  { background: var(--ph-sand); }
.project-badge--maker::before { background: var(--ph-umber); }

.project-badge-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border-left: 1px solid var(--rule);
  padding-left: var(--space-3);
}

/* ============================================================
   AI INVOLVEMENT METER
   A tiny 4-pip meter + mono caption. Hover/focus reveals a
   popover with the full scale and a link to the philosophy page.
   ============================================================ */
.ai-meter {
  --pip-on:  var(--fern);
  --pip-off: var(--rule);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  padding: 0.45em 0.55em;
  cursor: help;
  border: 0;
  background: transparent;
}

/* Bridge the gap between the button and the popover so the cursor doesn't
   leave the hover area while moving toward the popup. */
.ai-meter::before {
  content: '';
  position: absolute;
  top: 100%;
  left: -8px;
  right: -8px;
  height: 14px;
}
.ai-meter--up::before {
  top: auto;
  bottom: 100%;
}

.ai-meter:focus { outline: none; }
.ai-meter:focus-visible .ai-meter__pips i { box-shadow: 0 0 0 2px var(--fern-soft); }

.ai-meter__pips {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.ai-meter__pips i {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1px solid var(--pip-off);
  background: transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.ai-meter[data-ai-level="1"] .ai-meter__pips i:nth-child(-n+1),
.ai-meter[data-ai-level="2"] .ai-meter__pips i:nth-child(-n+2),
.ai-meter[data-ai-level="3"] .ai-meter__pips i:nth-child(-n+4) {
  background: var(--pip-on);
  border-color: var(--pip-on);
}

/* L3 means all four; L0 means none — handled by absence of nth-child rule. */

.ai-meter__label {
  display: none;
}

/* If you want the inline caption back, set:
   .ai-meter__label { display: inline; }
*/

/* Popover ---------------------------------------------------- */
.ai-meter__pop {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  z-index: 100;
  width: 310px;
  max-width: calc(100vw - 32px);
  padding: var(--space-3) var(--space-4);
  background: var(--paper-3);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.6) inset,
    0 8px 28px -10px rgba(31, 24, 18, 0.25),
    0 2px 6px -2px rgba(31, 24, 18, 0.10);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast),
    visibility var(--transition-fast);
  text-transform: none;
  letter-spacing: normal;
  pointer-events: none;
  font-size: var(--text-sm);
  color: var(--ink-2);
}

.ai-meter:hover .ai-meter__pop,
.ai-meter:focus-visible .ai-meter__pop,
.ai-meter.is-open .ai-meter__pop {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* Flip popover to the right side when card is near right edge */
.ai-meter--right .ai-meter__pop { left: auto; right: 0; }

/* Flip popover upward when there isn't room below */
.ai-meter--up .ai-meter__pop {
  top: auto;
  bottom: calc(100% + 10px);
  transform: translateY(4px);
}
.ai-meter--up:hover .ai-meter__pop,
.ai-meter--up:focus-visible .ai-meter__pop,
.ai-meter--up.is-open .ai-meter__pop { transform: translateY(0); }

.ai-meter__pop-title {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: 0.6em;
}

.ai-meter__pop-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.ai-meter__scale {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: var(--space-2);
}

.ai-meter__level {
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: baseline;
  gap: var(--space-3);
  padding: 5px var(--space-2);
  border-left: 2px solid transparent;
  border-radius: 1px;
  transition: background var(--transition-fast);
}

.ai-meter__level[data-current="true"] {
  background: var(--paper-2);
  border-left-color: var(--fern);
}

.ai-meter__level[data-current="true"] .ai-meter__level-name { color: var(--ink); }

.ai-meter__level-pips {
  display: inline-flex;
  gap: 3px;
}

.ai-meter__level-pips i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  display: block;
}

.ai-meter__level-pips i.on {
  background: var(--fern);
  border-color: var(--fern);
}

.ai-meter__level[data-current="false"] .ai-meter__level-pips i.on {
  background: var(--ink-faint);
  border-color: var(--ink-faint);
}

.ai-meter__level-body {
  display: block;
  line-height: 1.35;
}

.ai-meter__level-name {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-2);
  letter-spacing: 0;
}

.ai-meter__level-name::after {
  content: " \2014 ";
  font-weight: 400;
  color: var(--ink-mute);
}

.ai-meter__level-desc {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--ink-mute);
  letter-spacing: 0;
}

.ai-meter__pop-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fern-deep);
  border-top: 1px solid var(--rule);
  padding-top: var(--space-2);
  margin-top: 2px;
  text-decoration: none;
  font-weight: 600;
}

.ai-meter__pop-link:hover {
  color: var(--fern);
  text-decoration: none;
}

.ai-meter__pop-link .arrow {
  transition: transform var(--transition-fast);
}

.ai-meter__pop-link:hover .arrow { transform: translate(2px, -2px); }

/* ============================================================
   AI PHILOSOPHY PAGE
   ============================================================ */
.ai-page {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 var(--space-6) var(--space-16);
}

.ai-scale-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--rule);
  margin-top: var(--space-8);
}

.ai-scale-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-6);
  align-items: start;
  padding: var(--space-6) var(--space-2);
  border-bottom: 1px solid var(--rule);
}

.ai-scale-row__meter {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: 4px;
}

.ai-scale-row__pips {
  display: inline-flex;
  gap: 4px;
}

.ai-scale-row__pips i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--rule);
  display: block;
}

.ai-scale-row__pips i.on {
  background: var(--fern);
  border-color: var(--fern);
}

.ai-scale-row__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  text-transform: uppercase;
}

.ai-scale-row__name {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: var(--space-2);
}

.ai-scale-row__body p {
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  color: var(--ink-2);
}

@media (max-width: 560px) {
  .ai-scale-row { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* ============================================================
   HOBBIES PAGE
   ============================================================ */
.hobby-section {
  border-top: 1px solid var(--rule);
  max-width: var(--max-content);
  margin: 0 auto;
  padding: var(--space-16) var(--space-6) var(--space-12);
  position: relative;
}

.hobby-section:first-of-type { border-top: none; padding-top: var(--space-8); }

.hobby-section__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: block;
  margin-bottom: var(--space-3);
}

.hobby-section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-8);
}

.hobby-section__layout {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-10);
  align-items: start;
}

.hobby-gallery {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.hobby-gallery__row {
  display: flex;
  gap: var(--space-3);
}

.hobby-gallery__row .ph-image,
.hobby-gallery__row img { flex: 1; min-width: 0; }

.hobby-gallery__row img {
  height: 280px;
  object-fit: cover;
  object-position: center;
  display: block;
  width: 100%;
}

.hobby-gallery__item { border-radius: var(--radius-sm); overflow: hidden; }

.hobby-section__text p {
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  margin-bottom: var(--space-4);
  color: var(--ink-2);
}

.hobby-section__text p:last-child { margin-bottom: 0; }
.hobby-section__text p:first-of-type::first-letter {
  font-family: var(--font-serif);
  font-size: 2.7em;
  float: left;
  line-height: 0.92;
  margin: 0.08em 0.12em 0 -0.04em;
  color: var(--fern-deep);
  font-weight: 500;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 760px) {
  .home-hero {
    grid-template-columns: 1fr;
    padding-top: var(--space-10);
    gap: var(--space-6);
    align-items: start;
  }

  .home-hero__photo-wrap {
    order: -1;
    width: 140px;
    aspect-ratio: 1;
  }

  .home-hero__name { font-size: clamp(2.2rem, 12vw, 3.5rem); }

  .lab-project__body,
  .hobby-section__layout { grid-template-columns: 1fr; gap: var(--space-6); }

  .site-nav__inner { gap: var(--space-3); }

  .site-nav__links { gap: var(--space-4); }
  .nav__link { font-size: 0.66rem; letter-spacing: 0.1em; }

  .page-title { font-size: var(--text-3xl); }
}

@media (max-width: 480px) {
  .site-nav__links { gap: var(--space-3); }
}

/* ============================================================
   VIDEO PLAYER
   ============================================================ */
.video-player {
  position: relative;
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  background: var(--paper-2);
  margin-top: var(--space-3);
  border: 1px solid var(--rule);
  outline: none;
  display: flex;
  justify-content: center;
}

.video-player:focus-visible {
  outline: 2px solid var(--fern);
  outline-offset: 3px;
}

.video-player__video {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 80vh;
  vertical-align: bottom;
}

.video-player__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(31, 24, 18, 0.28);
  transition:
    background var(--transition-base),
    opacity var(--transition-base);
}

.video-player.is-playing .video-player__overlay {
  background: transparent;
  opacity: 0;
}

.video-player.is-playing:hover .video-player__overlay {
  background: rgba(31, 24, 18, 0.18);
  opacity: 1;
}

.video-player__btn {
  position: relative;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--paper-on-ink);
  color: var(--fern-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 2px 10px rgba(31, 24, 18, 0.4),
    0 0 0 5px rgba(241, 231, 210, 0.18);
  transition:
    transform var(--transition-fast),
    background var(--transition-fast);
}

.video-player:hover .video-player__btn {
  transform: scale(1.09);
  background: var(--paper);
}

.vp-icon {
  width: 24px;
  height: 24px;
  position: absolute;
  transition: opacity var(--transition-fast);
}

.vp-icon--play  { opacity: 1; margin-left: 3px; }
.vp-icon--pause { opacity: 0; }

.video-player.is-playing         .vp-icon--play  { opacity: 0; }
.video-player.is-playing:hover   .vp-icon--pause { opacity: 1; }

/* ============================================================
   PRINT
   ============================================================ */
@media print {
  .site-nav, .site-footer, .project-filters { display: none; }
  body::before { display: none; }
  body { background: white; color: black; }
}