/* ============================================================================
   EUREKA LABS — SHARED STYLES
   All visual styles for index.html and lab.html.
   Design tokens (colors, fonts) are at the top — start here for theming.
   ============================================================================ */

:root {
  --color-page:        #faf8f3;
  --color-surface:     #f0ede6;
  --color-surface-alt: #e6e2da;
  --color-text:        #1a1a17;
  --color-text-mid:    #5c5a52;
  --color-text-muted:  #8a877e;
  --color-text-faint:  #b5b2a9;
  --color-forest:       #1d6b52;
  --color-forest-dark:  #155741;
  --color-forest-light: #e4f2ec;
  --color-copper:       #c45a2d;
  --color-copper-light: #faeee8;
  --color-plum:         #6b4f8a;
  --color-plum-light:   #f0eaf6;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans:  'DM Sans', system-ui, sans-serif;
  --border-subtle: 1px solid rgba(0, 0, 0, 0.06);
  --radius:        10px;
  --radius-pill:   100px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--color-page); color: var(--color-text); line-height: 1.75; overflow-x: hidden; }
a { color: var(--color-forest); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-copper); }

/* --- Utility --- */
.hidden { display: none !important; }

/* --- Accessibility --- */
.skip-link { position: absolute; top: -100%; left: 1rem; padding: 0.5rem 1rem; background: var(--color-forest); color: #fff; border-radius: var(--radius); z-index: 200; font-size: 0.8rem; }
.skip-link:focus { top: 1rem; }

/* --- Nav --- */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 1rem 3rem; display: flex; align-items: center; justify-content: space-between; background: rgba(250, 248, 243, 0.92); backdrop-filter: blur(16px); border-bottom: var(--border-subtle); }
.logo { font-family: var(--font-serif); font-size: 1.6rem; color: var(--color-text); letter-spacing: -0.02em; }
.logo em { font-style: italic; color: var(--color-forest); }
.nav-links { list-style: none; display: flex; gap: 2.5rem; }
.nav-links a { font-size: 0.8rem; color: var(--color-text-muted); font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; transition: color 0.2s; }
.nav-links a:hover { color: var(--color-text); }

.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger svg { width: 24px; height: 24px; stroke: var(--color-text); }
.mobile-menu { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(250, 248, 243, 0.98); z-index: 150; flex-direction: column; align-items: center; justify-content: center; gap: 2rem; }
.mobile-menu.open { display: flex; }
.mobile-menu a { font-family: var(--font-serif); font-size: 1.8rem; color: var(--color-text); }
.mobile-menu .close-btn { position: absolute; top: 1.25rem; right: 1.5rem; background: none; border: none; cursor: pointer; padding: 4px; }
.mobile-menu .close-btn svg { width: 24px; height: 24px; stroke: var(--color-text); }

/* --- Layout --- */
section { padding: 6rem 3rem; }
.container { max-width: 1040px; margin: 0 auto; }
.section-eyebrow { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.22em; color: var(--color-forest); margin-bottom: 0.5rem; font-weight: 600; }
.section-title { font-family: var(--font-serif); font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 400; letter-spacing: -0.02em; margin-bottom: 0.75rem; line-height: 1.12; }
.section-desc { color: var(--color-text-mid); max-width: 540px; margin-bottom: 3rem; font-size: 0.92rem; }

/* --- Shared components --- */
.tag { font-size: 0.6rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; padding: 0.18rem 0.5rem; border-radius: var(--radius-pill); white-space: nowrap; background: var(--tag-bg); color: var(--tag-color); }
.tags { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; gap: 0.6rem; padding: 0.7rem 1.6rem; background: var(--color-forest); border: none; border-radius: var(--radius-pill); font-family: var(--font-sans); font-size: 0.82rem; font-weight: 500; color: #fff; letter-spacing: 0.02em; cursor: pointer; transition: background 0.25s; }
.btn-primary:hover { background: var(--color-forest-dark); color: #fff; }
.btn-primary svg { width: 14px; height: 14px; transition: transform 0.25s; }
.btn-primary:hover svg { transform: translateX(3px); }
.badge { display: inline-block; font-size: 0.62rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.12em; padding: 0.18rem 0.55rem; border-radius: var(--radius-pill); margin-bottom: 0.5rem; }

/* --- Hero (index.html) --- */
.hero { padding: 8rem 6rem 6rem; border-bottom: var(--border-subtle); }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; align-items: start; max-width: 1280px; margin: 0 auto; }
.hero-left { display: flex; flex-direction: column; padding-top: 3rem; }
.hero-right { padding-top: 3rem; }
.hero-eyebrow { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.22em; color: var(--color-forest); margin-bottom: 1.5rem; font-weight: 600; }
.hero h1 { font-family: var(--font-serif); font-size: clamp(2.4rem, 4.5vw, 4rem); font-weight: 400; line-height: 1.08; letter-spacing: -0.03em; margin-bottom: 2rem; }
.hero h1 .accent { font-style: italic; color: var(--color-copper); }
.hero-left > p { color: var(--color-text-mid); font-size: 1rem; line-height: 1.85; margin-bottom: 2.5rem; }
.hero-rule { display: flex; align-items: center; gap: 1.5rem; margin-top: 3rem; }
.hero-rule span { height: 1px; flex: 0 0 50px; background: var(--color-text-faint); }
.hero-rule small { font-size: 0.7rem; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.15em; font-weight: 500; }

/* --- About columns (inside hero-right) --- */
.about-columns { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 2rem; }
.about-prose { color: var(--color-text-mid); font-size: 0.88rem; }
.about-prose p { margin-bottom: 1.1rem; }

/* --- Lab catalog (index.html) --- */
.labs { background: var(--color-surface); border-top: var(--border-subtle); border-bottom: var(--border-subtle); }
.search-wrap { position: relative; margin-bottom: 1.5rem; }
.search-icon { position: absolute; left: 0.85rem; top: 50%; transform: translateY(-50%); width: 14px; height: 14px; stroke: var(--color-text-muted); pointer-events: none; }
#lab-search { width: 100%; padding: 0.55rem 1rem 0.55rem 2.4rem; border: 1px solid rgba(0,0,0,0.1); border-radius: var(--radius-pill); background: var(--color-page); font-family: var(--font-sans); font-size: 0.88rem; color: var(--color-text); outline: none; transition: border-color 0.2s; }
#lab-search::placeholder { color: var(--color-text-muted); }
#lab-search:focus { border-color: var(--color-forest); }
.filters-row { display: flex; gap: 2.5rem; margin-bottom: 2rem; flex-wrap: wrap; align-items: flex-start; }
.filter-group span { display: block; font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-text-muted); font-weight: 600; margin-bottom: 0.5rem; }
.filter-chips { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.filter-btn { font-family: var(--font-sans); font-size: 0.72rem; padding: 0.4rem 1rem; border: 1px solid rgba(0,0,0,0.1); border-radius: var(--radius-pill); background: var(--color-page); color: var(--color-text-muted); cursor: pointer; font-weight: 500; transition: all 0.2s; }
.filter-btn:hover { border-color: var(--color-text-mid); color: var(--color-text-mid); }
.filter-btn[aria-pressed="true"] { border-color: var(--color-forest); color: var(--color-forest); background: var(--color-forest-light); }
.labs-count { font-size: 0.78rem; color: var(--color-text-muted); margin-bottom: 1.25rem; }
.labs-list { display: flex; flex-direction: column; gap: 1px; background: rgba(0,0,0,0.06); border-radius: var(--radius); overflow: hidden; }
.lab-row { display: grid; grid-template-columns: 56px 1fr auto auto; gap: 1.5rem; align-items: center; padding: 1.25rem 1.75rem; background: var(--color-page); transition: background 0.2s; color: inherit; text-decoration: none; }
.lab-thumb { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; flex-shrink: 0; background: var(--color-surface-alt); }
.lab-row:hover { background: rgba(255,255,255,0.7); color: inherit; }
.lab-row h3 { font-family: var(--font-serif); font-size: 1rem; font-weight: 400; line-height: 1.35; }
.lab-row .arrow { font-size: 1.1rem; color: var(--color-text-faint); transition: transform 0.2s, color 0.2s; flex-shrink: 0; }
.lab-row:hover .arrow { transform: translateX(4px); color: var(--color-forest); }
.no-results { padding: 3rem; text-align: center; background: var(--color-page); border-radius: var(--radius); color: var(--color-text-muted); font-size: 0.9rem; display: none; }

/* Pagination */
.pagination-bar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(0,0,0,0.07); }
.page-size { display: flex; align-items: center; gap: 0.5rem; }
.page-size span { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-text-muted); font-weight: 600; }
.page-controls { display: flex; align-items: center; gap: 0.35rem; }
.page-btn { padding: 0.3rem 0.7rem; border: 1px solid rgba(0,0,0,0.12); border-radius: var(--radius-pill); background: var(--color-page); font-family: var(--font-sans); font-size: 0.78rem; color: var(--color-text); cursor: pointer; transition: background 0.15s, border-color 0.15s; }
.page-btn:hover:not([disabled]) { background: var(--color-surface-alt); }
.page-btn.active { background: var(--color-forest); color: #fff; border-color: var(--color-forest); font-weight: 600; }
.page-btn[disabled] { opacity: 0.35; cursor: default; }

/* --- Team (index.html) --- */
.team { background: var(--color-page); }
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 3rem 4rem; }
.team-member { display: flex; align-items: center; gap: 1.25rem; }
.team-avatar { width: 88px; height: 88px; border-radius: 50%; flex-shrink: 0; object-fit: cover; border: 2px solid rgba(29,107,82,0.15); }
div.team-avatar { display: flex; align-items: center; justify-content: center; font-family: var(--font-serif); font-size: 1.4rem; font-style: italic; background: var(--color-forest-light); color: var(--color-forest); }
.team-member h4 { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 400; margin-bottom: 0.15rem; }
.team-member h4 a { color: inherit; text-decoration: none; border-bottom: 1px solid rgba(29,107,82,0.3); transition: border-color 0.2s, color 0.2s; }
.team-member h4 a:hover { color: var(--color-forest); border-color: var(--color-forest); }
.team-member .role { font-size: 0.78rem; color: var(--color-text-mid); margin-bottom: 0.2rem; }
.team-member .affil { font-size: 0.68rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.08em; font-weight: 500; }
.collab-heading { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-text-muted); font-weight: 600; margin: 2.5rem 0 1.25rem; padding-top: 2rem; border-top: 1px solid rgba(0,0,0,0.07); }
.collab-grid .team-member .role { display: none; }

/* --- Lab detail page (lab.html) --- */
.lab-page { padding: 8rem 3rem 4rem; max-width: 780px; margin: 0 auto; }
.back-link { display: inline-block; font-size: 0.82rem; color: var(--color-text-muted); margin-bottom: 2rem; transition: color 0.2s; }
.back-link:hover { color: var(--color-forest); }
.lab-header { margin-bottom: 2rem; }
.lab-header .tags { margin-bottom: 1rem; }
.lab-header h1 { font-family: var(--font-serif); font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 400; line-height: 1.15; letter-spacing: -0.02em; }
.lab-meta { display: flex; gap: 2rem; flex-wrap: wrap; padding: 1rem 0; margin-bottom: 2rem; border-top: var(--border-subtle); border-bottom: var(--border-subtle); }
.lab-meta-item { display: flex; flex-direction: column; gap: 0.15rem; }
.meta-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-text-muted); font-weight: 600; }
.lab-image { margin-bottom: 2.5rem; border-radius: var(--radius); overflow: hidden; border: var(--border-subtle); }
.lab-image img { width: 100%; max-height: 360px; object-fit: cover; display: block; }
.lab-section { margin-bottom: 2.5rem; }
.lab-section h2 { font-family: var(--font-serif); font-size: 1.3rem; font-weight: 400; margin-bottom: 0.75rem; color: var(--color-text); }
.lab-section p { color: var(--color-text-mid); font-size: 0.95rem; line-height: 1.85; }
.resources-list { list-style: none; padding: 0; }
.resources-list li { margin-bottom: 0.5rem; }
.resources-list li a { font-size: 0.92rem; font-weight: 500; color: var(--color-forest); }
.resources-list li a:hover { color: var(--color-copper); }
.lab-not-found { text-align: center; padding: 4rem 0; }
.lab-not-found h1 { font-family: var(--font-serif); font-size: 2rem; margin-bottom: 1rem; }
.lab-not-found p { color: var(--color-text-muted); margin-bottom: 2rem; }

/* --- Footer --- */
footer { padding: 3rem; text-align: center; border-top: var(--border-subtle); }
footer p { font-size: 0.78rem; color: var(--color-text-faint); }
.footer-links { display: flex; gap: 2rem; justify-content: center; margin-bottom: 1rem; }
.footer-links a { font-size: 0.8rem; color: var(--color-text-mid); font-weight: 500; }
.nsf-note { font-size: 0.72rem; color: var(--color-text-muted); margin-bottom: 1rem; font-style: italic; }

/* --- Mobile --- */
@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { display: none; }
  .hamburger { display: block; }
  .hero { padding: 6rem 1.5rem 3rem; }
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .hero-right { padding-top: 0; }
  section { padding: 4rem 1.5rem; }
  .filters-row { gap: 1.5rem; }
  .lab-row { grid-template-columns: 48px 1fr; gap: 0.75rem; padding: 1rem 1.25rem; }
  .lab-thumb { width: 48px; height: 48px; }
  .lab-row .tags { grid-column: 2; }
  .lab-row .arrow { display: none; }
  .lab-page { padding: 7rem 1.5rem 3rem; }
  .team-grid { grid-template-columns: 1fr; gap: 2rem; }
}