/* ═══════════════════════════════════════════════════════════════
   T. Bigler Portfolio – Theme CSS
   Design: Dark tech, green accent (#00c878), Inter + JetBrains Mono
   ═══════════════════════════════════════════════════════════════ */

/* ── Reset & base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent:       #00c878;
  --accent-dim:   #00c87826;
  --accent-border:#00c87850;
  --bg-deep:      #122033;
  --bg-card:      #192b40;
  --bg-pill:      #22364c;
  --text-primary: #e2e8f0;
  --text-muted:   #a7b5c7;
  --text-dim:     #c0cad7;
  --border:       #30465f;
  --border-hover: #00c87880;
  --shadow-card:  0 10px 30px rgba(2, 8, 18, .18);
  --radius-sm:    6px;
  --radius-md:    10px;
  --radius-lg:    14px;
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;
  --container:    900px;
  --section-gap:  4rem;
  --bg-tool:      #22364c;
  --accent-tool:  #0ea5e9;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }

/* ── Layout ────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}
.container.container--wide { max-width: 1150px; }

/* ── Hero ──────────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 0%, rgba(0, 200, 120, .09), transparent 38%),
    linear-gradient(135deg, #152a3d 0%, var(--bg-deep) 72%);
  border-bottom: 0.5px solid var(--border);
  padding: 3.5rem 0 3rem;
}

/* PCB grid and abstract trace background */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(0,200,120,.04) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg,  rgba(0,200,120,.04) 0 1px, transparent 1px 48px);
  pointer-events: none;
}

.hero-grid-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../img/pcb-traces.svg?v=3');
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  opacity: .11;
  -webkit-mask-image: radial-gradient(ellipse 58% 72% at 50% 50%, transparent 18%, #000 76%);
  mask-image: radial-gradient(ellipse 58% 72% at 50% 50%, transparent 18%, #000 76%);
}

.hero-inner {
  display: flex;
  align-items: stretch;
  gap: 2.5rem;
  position: relative;
}

/* Avatar — blending portrait */
.hero-avatar {
  flex-shrink: 0;
  width: 220px;
  align-self: stretch;
  position: relative;
  background: transparent;
}
.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;

  -webkit-mask-image: radial-gradient(
    ellipse 98% 98% at 50% 25%,
    black 20%,
    rgba(0, 0, 0, 0.65) 48%,
    rgba(0, 0, 0, 0.15) 68%,
    transparent 88%
  );
  mask-image: radial-gradient(
    ellipse 98% 98% at 50% 25%,
    black 20%,
    rgba(0, 0, 0, 0.65) 48%,
    rgba(0, 0, 0, 0.15) 68%,
    transparent 88%
  );
}
.avatar-initials {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--accent);
}

/* Hero text */
.hero h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: .2rem;
}

.hero h1 .accent { color: var(--accent); }

.hero-role {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 500;
  line-height: 1.35;
  color: var(--text-dim);
  margin-bottom: .55rem;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .75rem;
}

.hero-desc {
  font-size: .9375rem;
  color: var(--text-dim);
  max-width: 520px;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

/* Primary hero CTA */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--bg-deep);
  background: color-mix(in srgb, var(--accent) 75%, var(--bg-deep));
  border-radius: 20px;
  padding: 10px 22px;
  margin-bottom: 14px;
  transition: background .15s, transform .15s;
}
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, white); transform: translateY(-1px); }
.btn-primary i { font-size: .9375rem; }

/* Hero nav links */
.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8125rem;
  color: var(--accent);
  border: 0.5px solid var(--accent-border);
  border-radius: 20px;
  padding: 4px 14px;
  transition: background .15s;
}
.hero-links a:hover { background: var(--accent-dim); }
.hero-links a i { font-size: .875rem; }

/* Quick section navigation */
.quick-nav {
  background: var(--bg-card);
  border-bottom: 0.5px solid var(--border);
}
.quick-nav-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-block: .75rem;
}
.quick-nav-label {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.quick-nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
}
.quick-nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: .8125rem;
  color: var(--text-dim);
  transition: color .15s;
}
.quick-nav-links a:hover { color: var(--accent); }
.quick-nav-links a i {
  font-size: .8125rem;
  color: var(--accent);
}

/* ── Section ───────────────────────────────────────────────────── */
.section {
  padding-top: var(--section-gap);
  padding-bottom: 0;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-title::after {
  content: '';
  flex: 1;
  height: 0.5px;
  background: var(--border);
}

/* ── Skills grid ───────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
}

.skill-card {
  background: var(--bg-card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 1.25rem 1.1rem;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.skill-card:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, .22);
}
.skill-card i {
  font-size: 1.5rem;
  color: color-mix(in srgb, var(--accent) 72%, var(--text-dim));
  display: block;
  margin-bottom: 10px;
}
.skill-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
  display: block;
  margin-bottom: 10px;
}
.skill-card h3 {
  font-size: .9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.skill-card p {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Tool cards ─────────────────────────────────────────────────── */
.tool-group-title {
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: .85rem;
}
.tool-group-grid + .tool-group-title { margin-top: 1.75rem; }
.tool-group-grid {
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
}

.tool-card {
  background: var(--bg-tool);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 1.25rem 1.1rem;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.tool-card:hover {
  border-color: color-mix(in srgb, var(--accent-tool) 45%, var(--border));
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, .22);
}
.tool-card i {
  font-size: 1.5rem;
  color: var(--accent-tool);
  display: block;
  margin-bottom: 10px;
}
.tool-card h3 {
  font-size: .9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.tool-summary {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.tool-highlights {
  margin-top: .55rem;
  padding-left: 1.1rem;
  list-style: disc;
}
.tool-highlights li {
  list-style: disc;
  font-size: .8125rem;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: .2rem;
}
.tool-highlights li:last-child { margin-bottom: 0; }

.tool-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
  display: block;
  margin-bottom: 10px;
}

/* ── Projects grid ─────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding-bottom: var(--section-gap);
}

/* JavaScript progressively collapses projects beyond the selected set. */
.js .projects-grid--toggleable { padding-bottom: 1rem; }
.js .proj-card--extra { display: none; }
.js .projects-grid--expanded .proj-card--extra { display: flex; }

.projects-toggle-wrap { display: none; }
.js .projects-toggle-wrap {
  display: flex;
  justify-content: center;
  padding-bottom: var(--section-gap);
}
.projects-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 0.5px solid var(--accent-border);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-size: .875rem;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.projects-toggle:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
}
.projects-toggle i {
  font-size: 1rem;
  transition: transform .2s ease;
}
.projects-toggle[aria-expanded="true"] i { transform: rotate(180deg); }

.proj-card {
  background: var(--bg-card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color .2s, transform .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
}
.proj-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, .28);
}

.proj-img {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.proj-img img { width: 100%; height: 100%; object-fit: cover; }

.proj-img--contain { background: var(--bg-deep); }
.proj-img--contain img { object-fit: contain; }

/* Multi-image carousel */
.proj-img--carousel { cursor: pointer; }
.proj-img--carousel img {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .5s ease;
}
.proj-img--carousel img.is-active { opacity: 1; }

.proj-dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8px;
  display: flex;
  justify-content: center;
  gap: 6px;
  z-index: 1;
}
.proj-dot {
  width: 7px;
  height: 7px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, .4);
  cursor: pointer;
  transition: background .2s, transform .2s;
}
.proj-dot:hover { transform: scale(1.2); }
.proj-dot.is-active { background: var(--accent); }

.proj-img--placeholder {
  background: var(--bg-deep);
  display: flex;
  align-items: center;
  justify-content: center;
}
.proj-img--placeholder i { font-size: 2.5rem; color: var(--accent); opacity: .6; }

.proj-body {
  padding: 1rem 1rem .875rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.proj-body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.proj-body h3 a { color: var(--text-primary); transition: color .15s; }
.proj-body h3 a:hover { color: var(--accent); }
.proj-body > p {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
  flex: 1;
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.tag {
  font-size: .75rem;
  font-family: var(--font-mono);
  background: #0f3326;
  color: #4ade9e;
  border-radius: 20px;
  padding: 2px 10px;
  border: 0.5px solid #00c87830;
  max-width: 100%;
  overflow-wrap: anywhere;
}

/* Compact, secondary tool metadata on project cards */
.card-tools {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 8px;
}
.card-tools-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.tool-tags {
  display: flex;
  flex-wrap: wrap;
  min-width: 0;
  gap: 4px;
}
.tool-tag {
  max-width: 100%;
  padding: 2px 8px;
  border: 0.5px solid var(--border);
  border-radius: 20px;
  background: var(--bg-pill);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: .6875rem;
  overflow-wrap: anywhere;
}

.proj-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 12px;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--accent);
  transition: gap .15s;
}
.proj-card-cta i { font-size: .8125rem; transition: transform .15s; }
.proj-card-cta:hover i,
.proj-card:hover .proj-card-cta i { transform: translateX(3px); }

.proj-body h3 a:focus-visible,
.proj-card-cta:focus-visible,
.btn-primary:focus-visible,
.hero-links a:focus-visible,
.quick-nav-links a:focus-visible,
.contact-bar nav a:focus-visible,
.btn-connect:focus-visible,
.back-link:focus-visible,
.btn-outline:focus-visible,
.projects-toggle:focus-visible,
.proj-dot:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 8px;
}

/* ── Contact footer ─────────────────────────────────────────────── */
.contact-bar {
  background: var(--bg-card);
  border-top: 0.5px solid var(--border);
  margin-top: var(--section-gap);
  padding: 1.75rem 0;
}
.contact-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
}
.contact-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-version {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-muted);
}
.contact-label {
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.contact-bar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.contact-bar nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8125rem;
  color: var(--text-dim);
  transition: color .15s;
}
.contact-bar nav a:hover { color: var(--accent); }
.contact-bar nav a i { font-size: .9375rem; }

.btn-connect {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--accent);
  border: 0.5px solid var(--accent-border);
  border-radius: 20px;
  padding: 6px 20px;
  transition: background .15s, box-shadow .15s;
  white-space: nowrap;
}
.btn-connect:hover {
  background: var(--accent-dim);
  box-shadow: 0 0 0 1px var(--accent-border);
}
.btn-connect i { font-size: .875rem; }

/* ── Project detail page ────────────────────────────────────────── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  transition: color .15s;
}
.back-link:hover { color: var(--accent); }
.back-link i { font-size: 1rem; }

.proj-detail-header { margin-bottom: 2rem; }

.proj-detail-hero-img {
  width: 100%;
  max-height: 360px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 0.5px solid var(--border);
  margin-bottom: 1.5rem;
}
.proj-detail-hero-img img { width: 100%; height: 100%; object-fit: cover; }

.proj-detail-hero-img--contain { background: var(--bg-deep); }
.proj-detail-hero-img--contain img { object-fit: contain; }

.proj-detail h1,
.page-title {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.proj-meta {
  font-size: .875rem;
  color: var(--text-muted);
  margin-bottom: .5rem;
}
.proj-meta-label {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--accent);
  margin-right: 6px;
  text-transform: uppercase;
  letter-spacing: .06em;
}

/* Prose (Markdown-rendered content) */
.prose { max-width: 680px; }
.prose h2 { font-size: 1.375rem; font-weight: 600; line-height: 1.3; margin: 2rem 0 .75rem; color: var(--text-primary); }
.prose h3 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; margin: 1.5rem 0 .5rem; color: var(--text-dim); }
.prose p  { font-size: 1rem; color: var(--text-muted); margin-bottom: 1rem; line-height: 1.75; }
.prose ul, .prose ol { margin: 0 0 1rem 1.25rem; }
.prose li { font-size: 1rem; color: var(--text-muted); margin-bottom: .35rem; line-height: 1.7; }
.prose code {
  font-family: var(--font-mono);
  font-size: .8125rem;
  background: var(--bg-pill);
  color: var(--accent);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  border: 0.5px solid var(--border);
}
.prose pre {
  background: var(--bg-card);
  border: 0.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
}
.prose pre code { background: none; border: none; padding: 0; font-size: .875rem; color: var(--text-dim); }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { opacity: .8; }
.prose img { border-radius: var(--radius-md); border: 0.5px solid var(--border); margin: 1.5rem 0; }
.prose blockquote {
  border-left: 2px solid var(--accent);
  margin: 1.5rem 0;
  padding: .5rem 1rem;
  color: var(--text-dim);
  font-style: italic;
}

/* Outline button */
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .875rem;
  color: var(--accent);
  border: 0.5px solid var(--accent-border);
  border-radius: var(--radius-md);
  padding: 8px 18px;
  transition: background .15s;
}
.btn-outline:hover { background: var(--accent-dim); }
.btn-outline i { font-size: 1rem; }

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .hero-grid-bg::after {
    background-position: right center;
    background-size: auto 100%;
    opacity: .08;
    -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, .2), #000);
    mask-image: linear-gradient(90deg, rgba(0, 0, 0, .2), #000);
  }
  .hero-inner { flex-direction: column; align-items: flex-start; gap: 1.25rem; }
  .hero-avatar {
    width: 72px;
    height: 72px;
    align-self: auto;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--accent);
    background: var(--bg-card);
  }
  .hero-avatar img {
    -webkit-mask-image: none;
    mask-image: none;
  }
  .hero h1 { font-size: 1.5rem; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-inner { flex-direction: column; align-items: flex-start; }
  .contact-left { flex-direction: column; align-items: flex-start; gap: .5rem; }
}

/* ── Reduced motion ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .skill-card, .proj-card { transition: none; }
  .proj-img--carousel img { transition: none; }
  .projects-toggle, .projects-toggle i { transition: none; }
}