/* ========================================================================
   Theme colors — swap these variables to restyle the whole site.
   Dark is the default. A saved user toggle still wins; the system
   light/dark preference is not followed automatically.
   ======================================================================== */

:root,
[data-theme="dark"] {
  /* Near-black with a cool blue undertone */
  --bg: #07090f;
  --bg-alt: #0b1018;
  --card: #101826;
  --ink: #e8eef8;
  --muted: #9aa8bf;
  --accent: #4d8eff;        /* primary blue, matches the logo */
  --accent-soft: #7eb0ff;   /* lighter blue for hover / secondary */
  --accent-ink: #06122a;    /* text on solid blue buttons */
  --line: #1c2738;
  --status-live: #4d8eff;
  --status-wip: #8fb4ff;
  --status-wip-ink: #06122a;
  --shadow: 0 24px 50px -32px rgba(0, 0, 0, 0.85);
  --header-bg: rgba(7, 9, 15, 0.88);
  --glow: rgba(77, 142, 255, 0.16);
  --theme-color: #07090f;
}

[data-theme="light"] {
  /* Cool, high-contrast light theme in the same blue family */
  --bg: #f3f6fb;
  --bg-alt: #e6edf7;
  --card: #ffffff;
  --ink: #0d1524;
  --muted: #3e4c63;
  --accent: #1b5fd0;
  --accent-soft: #0b3d8c;
  --accent-ink: #f5f9ff;
  --line: #c5d2e6;
  --status-live: #1b5fd0;
  --status-wip: #0b3d8c;
  --status-wip-ink: #f5f9ff;
  --shadow: 0 16px 36px -24px rgba(13, 21, 36, 0.28);
  --header-bg: rgba(243, 246, 251, 0.92);
  --glow: rgba(27, 95, 208, 0.10);
  --theme-color: #f3f6fb;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  font-family: "Instrument Sans", "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(circle at 82% -8%, var(--glow), transparent 42%),
    radial-gradient(circle at 0% 18%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 34%),
    var(--bg);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
}

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

.skip {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.5rem 0.8rem;
  z-index: 40;
}

.skip:focus {
  top: 0.75rem;
}

.wrap {
  width: min(100% - 1.5rem, 1080px);
  margin-inline: auto;
}

.kicker {
  margin: 0 0 0.55rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
h3 {
  letter-spacing: -0.03em;
  line-height: 1.15;
  font-weight: 650;
}

h1,
.page-title {
  font-size: clamp(2rem, 7vw, 3.35rem);
  margin: 0 0 1rem;
  max-width: 22ch;
}

h2 {
  font-size: clamp(1.55rem, 4vw, 2.1rem);
  margin: 0 0 0.8rem;
}

h3 {
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
}

.lead,
.section-intro,
.prose p,
.project-summary,
.cert-note,
.lab-card p,
.service-summary {
  color: var(--muted);
}

.lead,
.section-intro {
  font-size: 1.08rem;
  max-width: 42rem;
  margin: 0 0 1.4rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  min-width: 0;
}

.logo span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.logo-mark-img {
  width: 2.15rem;
  height: 2.15rem;
  flex: 0 0 auto;
  display: block;
  object-fit: contain;
  background: transparent;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.theme-toggle,
.nav-toggle {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.theme-icon {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--accent-soft);
  box-shadow: 0 0 0 2px var(--card), 0 0 0 3px var(--accent-soft);
}

[data-theme="light"] .theme-icon {
  background: transparent;
  box-shadow: inset 0 0 0 2px var(--accent);
}

.nav-toggle {
  width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  width: 14px;
  height: 2px;
  background: var(--ink);
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.nav-toggle span {
  transition: transform 0.15s ease;
}

.site-nav {
  display: none;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

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

.site-nav a.is-active {
  box-shadow: inset 0 -2px 0 var(--accent);
}

.site-nav.is-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 4rem;
  left: 0;
  right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  padding: 0.6rem 1.25rem 1rem;
  box-shadow: var(--shadow);
}

.site-nav.is-open a {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
  box-shadow: none;
}

.site-nav.is-open a.is-active {
  color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn:hover {
  filter: brightness(1.06);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.page[hidden] {
  display: none;
}

.hero {
  padding: 3rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  gap: 1.5rem;
}

.hero-name-label {
  margin: 0 0 0.65rem;
  color: var(--muted);
  font-weight: 600;
}

.availability {
  display: inline-block;
  margin: 0 0 1.25rem;
  padding: 0.35rem 0.7rem;
  border: 1px dashed var(--line);
  border-radius: 999px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.82rem;
  color: var(--muted);
}

.availability.is-placeholder,
.is-placeholder {
  opacity: 0.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.featured-panel,
.project-card,
.lab-card,
.cert-card,
.skill-group,
.service-card,
.contact-facts,
.social-link {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.featured-panel {
  padding: 1.25rem 1.2rem 1.35rem;
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 12%, var(--card)), var(--card) 48%);
  align-self: stretch;
}

.featured-panel .project-summary {
  margin: 0 0 0.85rem;
}

.featured-panel .btn {
  margin-top: 0.35rem;
}

.section {
  padding: 3.25rem 0;
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--line);
}

.section-more {
  margin: 1.25rem 0 0;
  font-weight: 600;
}

.about-grid,
.contact-grid {
  display: grid;
  gap: 1.25rem;
}

.prose p {
  margin: 0 0 1rem;
  max-width: 44rem;
}

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

.projects-list,
.lab-grid,
.skills-groups,
.services-grid {
  display: grid;
  gap: 1rem;
}

.project-card,
.service-card {
  padding: 1.3rem 1.25rem 1.4rem;
}

.project-card.is-featured,
.service-card {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}

.project-card.is-featured {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 8%, var(--card)), var(--card) 40%);
}

.project-head,
.service-head {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.7rem;
}

.status,
.featured-flag {
  display: inline-block;
  margin: 0;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
}

.status {
  color: var(--accent-ink);
  background: var(--status-live);
}

.status.is-progress {
  background: var(--status-wip);
  color: var(--status-wip-ink);
}

.featured-flag {
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, var(--line));
}

.points {
  margin: 0.85rem 0 1rem;
  padding-left: 1.1rem;
  color: var(--muted);
}

.points li + li {
  margin-top: 0.35rem;
}

.project-link {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.88rem;
  word-break: break-all;
}

.skill-group,
.lab-card,
.cert-card {
  padding: 1.15rem 1.15rem 1.2rem;
}

.skill-group ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.7rem 0 0;
  padding: 0;
}

.skill-group li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-size: 0.92rem;
}

.certs-list {
  display: grid;
  gap: 1rem;
}

.contact-facts {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0.3rem 1.15rem;
}

.contact-facts li {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.contact-facts li:last-child {
  border-bottom: 0;
}

.contact-facts span {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-facts a,
.contact-facts .is-placeholder {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.social-links {
  display: grid;
  gap: 0.7rem;
}

.social-link {
  padding: 0.9rem 1.1rem;
  text-decoration: none;
  color: var(--ink);
  display: grid;
  gap: 0.15rem;
}

.social-link span,
.social-link.is-placeholder {
  color: var(--muted);
  font-size: 0.92rem;
  word-break: break-all;
}

.site-footer {
  padding: 2.25rem 0 2.75rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  gap: 0.5rem;
}

.footer-inner strong {
  color: var(--ink);
}

.footer-inner p {
  margin: 0;
}


.shinyside-grid {
  display: grid;
  gap: 1.25rem;
}

.shinyside-grid .status {
  margin: 0 0 0.85rem;
}

.shinyside-points {
  margin: 0;
  padding: 1.2rem 1.2rem 1.2rem 2rem;
  background: var(--card);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.service-card .project-head {
  margin-bottom: 0.55rem;
}

@media (min-width: 860px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    gap: 0.85rem;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }

  .site-nav a {
    font-size: 0.9rem;
  }

  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 2rem;
  }

  .about-grid,
  .contact-grid,
  .shinyside-grid,
  .lab-grid,
  .skills-groups,
  .services-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem 1.5rem;
  }

  .about-grid,
  .contact-grid,
  .shinyside-grid {
    grid-template-columns: 0.8fr 1.2fr;
  }

  .lab-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .services-grid-full {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 1.5rem;
  }

  .hero {
    padding: 4.5rem 0 5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .nav-toggle span {
    transition: none;
  }
}