/* ==========================================================================
   theonovak.com — site-wide design system
   Dark-first "quant terminal" theme layered over Bootstrap 5.
   Loaded after Bootstrap on every page, so these rules win.
   ========================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap");

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  --tn-font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --tn-font-body: "Inter", system-ui, -apple-system, sans-serif;
  --tn-font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  /* black & green: single jade accent */
  --tn-jade: #58c08a;
  --tn-jade-soft: #6fd1a0;

  --tn-radius: 16px;
  --tn-radius-sm: 10px;
  --tn-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-bs-theme="dark"] {
  --tn-bg: #060807;
  --tn-surface: rgba(14, 21, 17, 0.78);
  --tn-surface-solid: #0d1410;
  --tn-border: rgba(150, 180, 158, 0.13);
  --tn-border-hover: rgba(88, 192, 138, 0.4);
  --tn-text: #dbe5da;
  --tn-muted: #87a08d;
  --tn-glow: 0 0 0 1px rgba(88, 192, 138, 0.22), 0 8px 40px -8px rgba(88, 192, 138, 0.16), 0 12px 48px -12px rgba(42, 110, 79, 0.22);
  --tn-shadow: 0 10px 32px -12px rgba(0, 0, 0, 0.7);
  --bs-body-bg: var(--tn-bg);
  --bs-body-color: var(--tn-text);
  --bs-border-color: var(--tn-border);
  --bs-secondary-color: var(--tn-muted);
}

[data-bs-theme="light"] {
  --tn-bg: #f1f6f1;
  --tn-surface: rgba(252, 255, 252, 0.85);
  --tn-surface-solid: #fbfffb;
  --tn-border: rgba(30, 58, 40, 0.13);
  --tn-border-hover: rgba(46, 125, 84, 0.5);
  --tn-text: #15211a;
  --tn-muted: #5a6e60;
  --tn-glow: 0 0 0 1px rgba(46, 125, 84, 0.2), 0 12px 36px -10px rgba(46, 125, 84, 0.24);
  --tn-shadow: 0 10px 30px -14px rgba(20, 40, 28, 0.2);
  --bs-body-bg: var(--tn-bg);
  --bs-body-color: var(--tn-text);
  --bs-border-color: var(--tn-border);
}

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */
body {
  font-family: var(--tn-font-body);
  background-color: var(--tn-bg);
  color: var(--tn-text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
body > main { flex: 1 0 auto; }

/* Ambient gradient field behind everything (dark mode). */
[data-bs-theme="dark"] body {
  background-image:
    radial-gradient(60rem 40rem at 85% -10%, rgba(58, 157, 110, 0.06), transparent 60%),
    radial-gradient(50rem 36rem at -10% 25%, rgba(88, 192, 138, 0.04), transparent 60%),
    radial-gradient(44rem 40rem at 60% 110%, rgba(42, 110, 79, 0.06), transparent 60%);
  background-attachment: fixed;
}
[data-bs-theme="light"] body {
  background-image:
    radial-gradient(60rem 40rem at 85% -10%, rgba(58, 157, 110, 0.09), transparent 60%),
    radial-gradient(50rem 36rem at -10% 25%, rgba(88, 192, 138, 0.08), transparent 60%);
  background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
  font-family: var(--tn-font-display);
  letter-spacing: -0.01em;
}

::selection { background: rgba(88, 192, 138, 0.32); }

a { color: var(--tn-jade); text-decoration-color: rgba(88, 192, 138, 0.4); transition: color 0.18s; }
a:hover { color: var(--tn-jade-soft); }
[data-bs-theme="light"] a { color: #25714c; }
[data-bs-theme="light"] a:hover { color: #174f34; }

hr { border-color: var(--tn-border); opacity: 1; }

code { font-family: var(--tn-font-mono); font-size: 0.875em; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(150, 180, 158, 0.3); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: rgba(88, 192, 138, 0.5); }

/* --------------------------------------------------------------------------
   3. Navbar — glass bar with gradient accents
   -------------------------------------------------------------------------- */
.navbar.bg-white,
[data-bs-theme="dark"] .navbar.bg-white {
  background: var(--tn-bg) !important; /* fallback when color-mix unsupported */
  background: color-mix(in srgb, var(--tn-bg) 72%, transparent) !important;
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--tn-border) !important;
  box-shadow: none !important;
  transition: box-shadow 0.3s, background 0.3s;
}
.navbar.nav-scrolled { box-shadow: 0 8px 30px -14px rgba(0, 0, 0, 0.5) !important; }

.navbar-brand {
  font-weight: 700;
  position: relative;
  padding-left: 1.05em;
}
/* gradient marker dot */
.navbar-brand::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0.62em;
  height: 0.62em;
  transform: translateY(-50%) rotate(45deg);
  background: var(--tn-jade);
  border-radius: 3px;
}

.navbar .nav-link {
  font-weight: 500;
  position: relative;
  margin-inline: 0.15rem;
}
.navbar .nav-link::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  bottom: 0.25rem;
  height: 2px;
  border-radius: 2px;
  background: var(--tn-jade);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--tn-ease);
}
.navbar .nav-link:hover::after,
.navbar .nav-link.active::after { transform: scaleX(1); }

.theme-toggle {
  background: transparent;
  border: 0;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
}

/* --------------------------------------------------------------------------
   4. Cards — project / other grids (anchor blocks with thumbnails)
   -------------------------------------------------------------------------- */
main .row a.d-block {
  background: var(--tn-surface);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--tn-border);
  border-radius: var(--tn-radius);
  padding: 0.85rem 0.85rem 0.4rem;
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.3s var(--tn-ease), box-shadow 0.3s var(--tn-ease), border-color 0.3s;
  box-shadow: var(--tn-shadow);
}
main .row a.d-block:hover {
  transform: translateY(-5px);
  border-color: var(--tn-border-hover);
  box-shadow: var(--tn-glow);
}
main .row a.d-block .img-thumbnail {
  background: transparent;
  border: 0;
  padding: 0;
  border-radius: var(--tn-radius-sm);
  filter: saturate(0.96);
  transition: filter 0.3s, transform 0.3s var(--tn-ease);
}
main .row a.d-block:hover .img-thumbnail { filter: saturate(1.12); }
main .row a.d-block .figure-caption {
  color: var(--tn-muted);
  font-size: 0.82rem;
  line-height: 1.5;
  margin-top: 0.7rem;
}
main .row a.d-block .figure-caption b {
  color: var(--tn-text);
  font-family: var(--tn-font-display);
  font-size: 0.95rem;
  display: inline-block;
  margin-bottom: 0.15rem;
}

.figure-caption { color: var(--tn-muted); }

/* --------------------------------------------------------------------------
   5. Blog list — timeline-flavoured list group
   -------------------------------------------------------------------------- */
.list-group-item {
  background: var(--tn-surface);
  border: 1px solid var(--tn-border);
  border-radius: var(--tn-radius-sm) !important;
  margin-bottom: 0.7rem;
  padding: 1rem 1.15rem;
  border-left: 3px solid transparent;
  transition: transform 0.25s var(--tn-ease), border-color 0.25s, box-shadow 0.25s;
}
.list-group-item:hover {
  border-left-color: var(--tn-jade);
  transform: translateX(4px);
  box-shadow: var(--tn-shadow);
}
.list-group-item > a { font-weight: 600; font-family: var(--tn-font-display); text-decoration: none; }

/* --------------------------------------------------------------------------
   6. Tables / code panels on article subpages
   -------------------------------------------------------------------------- */
main table { --bs-table-bg: transparent; }
main .table {
  border-color: var(--tn-border);
  background: var(--tn-surface);
  border-radius: var(--tn-radius-sm);
  overflow: hidden;
}
[data-bs-theme="dark"] .bg-light {
  background-color: #101813 !important;
  color: var(--tn-text) !important;
  border-radius: var(--tn-radius-sm);
}
[data-bs-theme="dark"] pre code.hljs { border-radius: var(--tn-radius-sm); }
[data-bs-theme="dark"] main iframe { background-color: #fff; border-radius: var(--tn-radius-sm); }

main img.img-fluid:not(.img-thumbnail) { border-radius: var(--tn-radius-sm); }

/* --------------------------------------------------------------------------
   7. Footer
   -------------------------------------------------------------------------- */
footer {
  border-top: 1px solid var(--tn-border) !important;
  color: var(--tn-muted);
  flex-shrink: 0;
}
footer a { color: var(--tn-muted) !important; }
footer a:hover { color: var(--tn-jade) !important; }

/* --------------------------------------------------------------------------
   8. Shared components (page headers, chips, filters, buttons)
   -------------------------------------------------------------------------- */
.page-header { padding: 2.2rem 0 1.4rem; }
.page-header h1 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
}
.page-header .lead-sub { color: var(--tn-muted); max-width: 46rem; }

.text-gradient {
  background: var(--tn-jade);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.btn-gradient {
  background: var(--tn-jade);
  color: #06130c !important;
  font-weight: 600;
  border: 0;
  border-radius: 999px;
  padding: 0.55rem 1.3rem;
  transition: transform 0.2s var(--tn-ease), box-shadow 0.2s;
}
.btn-gradient:hover { transform: translateY(-2px); box-shadow: 0 8px 28px -8px rgba(88, 192, 138, 0.55); }

.btn-ghost {
  background: transparent;
  color: var(--tn-text) !important;
  border: 1px solid var(--tn-border);
  border-radius: 999px;
  padding: 0.55rem 1.3rem;
  font-weight: 500;
  transition: border-color 0.2s, transform 0.2s var(--tn-ease), box-shadow 0.2s;
}
.btn-ghost:hover { border-color: var(--tn-border-hover); transform: translateY(-2px); box-shadow: var(--tn-shadow); }

/* Filter bar (projects / other / index timeline) */
.filter-bar { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 1.4rem; }
.filter-btn {
  font-family: var(--tn-font-mono);
  font-size: 0.78rem;
  padding: 0.32rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--tn-border);
  background: var(--tn-surface);
  color: var(--tn-muted);
  cursor: pointer;
  transition: all 0.2s var(--tn-ease);
}
.filter-btn:hover { border-color: var(--tn-border-hover); color: var(--tn-text); transform: translateY(-1px); }
.filter-btn.active {
  background: var(--tn-jade);
  color: #06130c;
  border-color: transparent;
  font-weight: 600;
}
.filter-search {
  background: var(--tn-surface);
  border: 1px solid var(--tn-border);
  border-radius: 999px;
  color: var(--tn-text);
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  min-width: 14rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.filter-search:focus { border-color: var(--tn-border-hover); box-shadow: 0 0 0 3px rgba(88, 192, 138, 0.15); }
.filter-search::placeholder { color: var(--tn-muted); }

.tn-tag {
  display: inline-block;
  font-family: var(--tn-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--tn-border);
  color: var(--tn-jade);
  background: rgba(88, 192, 138, 0.08);
}
.tn-tag.tag-blog { color: var(--tn-jade); background: rgba(88, 192, 138, 0.08); }
.tn-tag.tag-research { color: var(--tn-jade); background: rgba(88, 192, 138, 0.08); }

/* --------------------------------------------------------------------------
   9. Scroll-reveal animation
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--tn-ease), transform 0.6s var(--tn-ease);
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* --------------------------------------------------------------------------
   10. Home page — hero
   -------------------------------------------------------------------------- */
.hero { position: relative; padding: 4.2rem 0 3rem; overflow: hidden; }
.hero-eyebrow {
  font-family: var(--tn-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--tn-jade);
  margin-bottom: 0.9rem;
}
.hero h1 {
  font-size: clamp(2.3rem, 6vw, 3.6rem);
  font-weight: 700;
  line-height: 1.05;
  margin-bottom: 0.7rem;
}
.hero-bio { color: var(--tn-muted); max-width: 38rem; line-height: 1.7; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.5rem; }

/* Headshot with gradient ring */
.hero-portrait { position: relative; width: min(100%, 300px); margin-inline: auto; }
.hero-portrait::before {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 22px;
  background: var(--tn-jade);
  opacity: 0.85;
  filter: blur(0.5px);
}
.hero-portrait img {
  position: relative;
  width: 100%;
  border-radius: 20px;
  display: block;
}
.hero-meta {
  background: var(--tn-surface);
  border: 1px solid var(--tn-border);
  border-radius: var(--tn-radius);
  padding: 1rem 1.2rem;
  font-size: 0.85rem;
  color: var(--tn-muted);
  margin-top: 1.1rem;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.hero-meta b { color: var(--tn-text); }

/* Section headers on home */
.home-section { margin-top: 3.4rem; }
.home-section > h2 {
  font-size: 1.35rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.2rem;
}
.home-section > h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--tn-border), transparent);
}
.home-section .section-kicker {
  font-family: var(--tn-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--tn-jade);
  display: block;
  margin-bottom: 0.3rem;
}

/* --------------------------------------------------------------------------
   12. Home page — featured strip (horizontal scroll carousel)
   -------------------------------------------------------------------------- */
.strip-wrap { position: relative; }
.scroll-strip {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 0.3rem 0.1rem 1rem;
  scrollbar-width: thin;
  cursor: grab;
}
.scroll-strip.dragging { cursor: grabbing; scroll-snap-type: none; }
.strip-card {
  flex: 0 0 280px;
  scroll-snap-align: start;
  background: var(--tn-surface);
  border: 1px solid var(--tn-border);
  border-radius: var(--tn-radius);
  overflow: hidden;
  text-decoration: none;
  transition: transform 0.3s var(--tn-ease), border-color 0.3s, box-shadow 0.3s;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.strip-card:hover { transform: translateY(-5px); border-color: var(--tn-border-hover); box-shadow: var(--tn-glow); }
.strip-card img { width: 100%; height: 150px; object-fit: cover; display: block; }
.strip-card .strip-body { padding: 0.9rem 1rem 1rem; }
.strip-card .strip-title {
  font-family: var(--tn-font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--tn-text);
  margin: 0.45rem 0 0.3rem;
  line-height: 1.3;
}
.strip-card .strip-desc { font-size: 0.78rem; color: var(--tn-muted); line-height: 1.5; margin: 0; }
.strip-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  border: 1px solid var(--tn-border);
  background: var(--tn-surface-solid);
  color: var(--tn-text);
  font-size: 1.1rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.strip-nav:hover { border-color: var(--tn-border-hover); box-shadow: var(--tn-glow); }
.strip-nav.prev { left: -0.7rem; }
.strip-nav.next { right: -0.7rem; }

/* --------------------------------------------------------------------------
   13. Home page — news timeline
   -------------------------------------------------------------------------- */
.timeline { position: relative; margin-top: 0.4rem; }
.timeline::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 2px;
  background: var(--tn-jade);
  opacity: 0.35;
  border-radius: 2px;
}
.tl-item { position: relative; padding: 0 0 1.1rem 2.1rem; }
.tl-item::before {
  content: "";
  position: absolute;
  left: 0.13rem;
  top: 0.42rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--tn-bg);
  border: 2px solid var(--tn-jade);
  transition: box-shadow 0.2s, background 0.2s;
}
.tl-item:hover::before { background: var(--tn-jade); box-shadow: 0 0 12px rgba(88, 192, 138, 0.7); }
.tl-head { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 0.25rem; }
.tl-date { font-family: var(--tn-font-mono); font-size: 0.78rem; color: var(--tn-muted); }
.tl-body { color: var(--tn-muted); font-size: 0.9rem; line-height: 1.65; margin: 0; }
.tl-body.clamped {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.tl-toggle {
  background: none;
  border: 0;
  padding: 0;
  font-family: var(--tn-font-mono);
  font-size: 0.74rem;
  color: var(--tn-jade);
  cursor: pointer;
}
.tl-toggle:hover { text-decoration: underline; }
.tl-empty { color: var(--tn-muted); font-style: italic; padding: 1rem 0 0 2.1rem; }

/* --------------------------------------------------------------------------
   15. Small screens
   -------------------------------------------------------------------------- */
@media (max-width: 767.98px) {
  .hero { padding-top: 2.4rem; }
  .strip-nav { display: none; }
  .filter-search { min-width: 100%; }
}