@tailwind base;
@tailwind components;
@tailwind utilities;

/* Base styles - Tailwind only */
@layer base {
  html {
    scroll-behavior: smooth;
  }

  body {
    @apply bg-white text-slate-800 font-serif antialiased selection:bg-slate-900 selection:text-white;
    line-height: 1.6;
  }

  /* Typography */
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    @apply font-sans font-bold text-slate-900 tracking-tighter;
  }

  h1 {
    @apply text-4xl md:text-6xl lg:text-8xl leading-[1.1] md:leading-[1] lg:leading-[0.95] mb-6 md:mb-8 lg:mb-12;
  }

  h2 {
    @apply text-2xl md:text-4xl lg:text-6xl leading-tight mb-4 md:mb-6 lg:mb-8 mt-12 lg:mt-16;
  }

  h3 {
    @apply text-xl md:text-3xl lg:text-5xl leading-tight mb-3 md:mb-4 lg:mb-6 mt-8 lg:mt-12;
  }

  h4 {
    @apply text-lg md:text-2xl lg:text-3xl leading-tight mb-3 lg:mb-4 mt-6 lg:mt-8;
  }

  p {
    @apply mb-6 text-base leading-relaxed text-slate-700;
  }

  .lead {
    @apply text-base md:text-xl lg:text-2xl text-slate-600 mb-6 leading-relaxed;
    font-weight: 400;
  }

  a {
    @apply text-slate-900 hover:text-slate-700 transition-colors no-underline;
  }

  ul,
  ol {
    @apply ml-5 mb-4;
  }

  li {
    @apply mb-1;
  }

  code:not([class*="language-"]) {
    @apply bg-slate-50 px-1.5 py-0.5 rounded-md font-mono text-[0.9em] text-slate-800 border border-slate-100;
  }

  blockquote {
    @apply border-l-4 border-slate-900 pl-6 italic text-slate-700 my-8 text-lg md:text-2xl font-serif;
  }

  /* Focus states */
  a:focus,
  button:focus,
  input:focus,
  textarea:focus {
    outline: none !important;
    box-shadow: none !important;
  }

  /* Interactive elements pointer */
  a,
  button,
  [role="button"],
  input[type="button"],
  input[type="submit"],
  input[type="reset"],
  select,
  summary,
  label[for] {
    cursor: pointer;
  }

  /* Ensure disabled elements don't show pointer */
  button:disabled,
  [role="button"]:disabled,
  input:disabled,
  select:disabled,
  button[disabled] {
    cursor: not-allowed;
  }

  /* Remove default tap highlight on mobile */
  * {
    -webkit-tap-highlight-color: transparent !important;
  }
}

/* Components - Tailwind utility classes */
@layer components {
  /* Legacy hooks required by tests */
  .file-example {
    @apply w-full;
  }

  .container {
    @apply max-w-6xl mx-auto px-5 md:px-6 lg:px-8 py-8 md:py-10 lg:py-12;
  }

  .wide-container {
    @apply max-w-7xl mx-auto px-5 md:px-6 lg:px-8 py-10 md:py-12 lg:py-16;
  }

  .narrow-container {
    @apply max-w-4xl mx-auto px-5 md:px-6 lg:px-8 py-6 md:py-8 lg:py-10;
  }

  .highlighter-tag {
    @apply inline-block text-[10px] uppercase tracking-wider font-bold px-3 py-1 rounded-full cursor-pointer transition-all duration-300;
    position: relative;
  }

  .search-box {
    @apply w-full px-6 py-4 border border-slate-200 rounded-2xl focus:outline-none focus:border-slate-400 transition-all duration-300;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
  }

  .search-box::placeholder {
    @apply text-slate-400;
  }

  /* Blog post card */
  .post-card {
    @apply mb-8 last:mb-0;
  }

  .post-meta {
    @apply text-xs text-slate-500 font-sans mb-2;
  }

  .post-excerpt {
    @apply text-slate-700 mb-2 leading-relaxed;
  }

  .post-tags {
    @apply flex flex-wrap gap-1;
  }

  /* Article page */
  .article-header {
    @apply mb-12;
  }

  .article-title {
    @apply text-4xl md:text-5xl font-bold mb-3;
  }

  .article-meta {
    @apply text-sm text-slate-500 font-sans mb-5;
  }

  .article-content {
    @apply font-serif antialiased text-slate-700;
  }

  .article-content p {
    @apply text-lg md:text-xl leading-relaxed mb-6;
  }

  .article-content h1 {
    @apply text-3xl md:text-5xl font-bold text-slate-900 mb-8 mt-12 tracking-tight leading-[1.1] font-sans;
  }

  .article-content h2 {
    @apply text-2xl md:text-4xl font-bold text-slate-900 mb-6 mt-10 tracking-tight leading-tight font-sans;
  }

  .article-content h3 {
    @apply text-xl md:text-2xl font-bold text-slate-900 mb-4 mt-8 tracking-tight leading-snug font-sans;
  }

  .article-content ul,
  .article-content ol {
    @apply ml-6 mb-6 text-lg md:text-xl;
  }

  .article-content li {
    @apply mb-2;
  }

  .article-content blockquote {
    @apply border-l-4 border-slate-900 pl-6 italic text-slate-700 my-10 text-xl md:text-2xl;
  }

  /* Buttons */
  .btn {
    @apply inline-flex items-center justify-center px-6 py-3 border border-slate-200 bg-white text-slate-600 font-sans font-bold text-sm uppercase tracking-widest rounded-full transition-all duration-500 hover:border-slate-400 hover:text-slate-900 hover:bg-slate-50 hover:-translate-y-0.5 hover:shadow-xl hover:shadow-slate-100 active:translate-y-0 active:shadow-sm;
    transition-timing-function: cubic-bezier(0.23, 1, 0.32, 1);
  }

  .btn-primary {
    @apply border-slate-900 text-slate-900 hover:bg-slate-900 hover:text-white;
  }

  .btn-secondary {
    @apply border-slate-200 text-slate-500 hover:border-slate-400 hover:text-slate-900;
  }

  /* Hide scrollbars but keep functionality */
  .no-scrollbar::-webkit-scrollbar {
    display: none;
  }

  .no-scrollbar {
    -ms-overflow-style: none;
    /* IE and Edge */
    scrollbar-width: none;
    /* Firefox */
  }

  /* Empty state */
  .empty-state {
    @apply text-center py-8 text-slate-500;
  }

  .empty-state svg {
    @apply mx-auto mb-2 text-slate-300;
  }

  /* Line clamp utility */
  .line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* Reading progress indicator */
  .reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: #0f172a;
    transform-origin: left;
    transform: scaleX(0);
    z-index: 100;
    transition: transform 0.1s ease-out;
  }

  /* Floating back to top button */
  .floating-back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 9999px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    opacity: 0;
    transform: translateY(8px);
    z-index: 50;
  }

  .floating-back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
  }

  .floating-back-to-top:hover {
    background: #f8fafc;
    color: #1e293b;
    border-color: #cbd5e1;
    transform: translateY(-4px);
    box-shadow:
      0 20px 25px -5px rgb(0 0 0 / 0.1),
      0 8px 10px -6px rgb(0 0 0 / 0.1);
  }

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

    * {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }

  /* Print styles */
  @media print {
    .floating-back-to-top,
    .reading-progress-bar {
      display: none !important;
    }
  }
}

/* Additional global styles from BaseLayout */

/* Selection color */
::selection {
  background: #0f172a;
  color: #ffffff;
}

/* Tag Styles */
.highlighter-tag {
  animation: tagPopIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  animation-delay: calc(var(--tag-index, 0) * 0.05s);
}

.highlighter-tag:hover {
  @apply -translate-y-0.5 scale-105 shadow-lg shadow-slate-200;
}

@keyframes tagPopIn {
  from {
    opacity: 0;
    transform: scale(0.8) translateY(10px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.highlighter-yellow {
  background: linear-gradient(
    135deg,
    rgba(255, 235, 59, 0.95) 0%,
    rgba(255, 213, 79, 0.95) 100%
  );
  color: #3f2f00;
}

.highlighter-pink {
  background: linear-gradient(
    135deg,
    rgba(255, 167, 209, 0.95) 0%,
    rgba(255, 122, 175, 0.95) 100%
  );
  color: #3f0018;
}

.highlighter-green {
  background: linear-gradient(
    135deg,
    rgba(129, 199, 132, 0.95) 0%,
    rgba(102, 187, 106, 0.95) 100%
  );
  color: #002f0a;
}

.highlighter-blue {
  background: linear-gradient(
    135deg,
    rgba(226, 232, 240, 0.95) 0%,
    rgba(203, 213, 225, 0.95) 100%
  );
  color: #0f172a;
}

.highlighter-tag:hover::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: inherit;
  filter: blur(8px);
  opacity: 0.4;
  z-index: -1;
  border-radius: inherit;
}

.highlighter-tag:active {
  transform: rotate(-1deg) translateY(0) scale(0.98);
  transition: transform 0.1s ease;
}

.highlighter-tag:focus {
  @apply -translate-y-0.5 scale-105;
  outline: none !important;
}

/* Marker Title Styles */
.marker-title::before {
  content: "";
  position: absolute;
  left: -0.15em;
  right: -0.15em;
  bottom: 0.05em;
  height: 0.62em;
  border-radius: 0.18em;
  z-index: -1;

  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0) 20%,
    rgba(253, 230, 138, 0.7) 20%,
    rgba(253, 230, 138, 0.7) 100%
  );

  transform-origin: left center;
  transform: rotate(calc((var(--marker-seed, 0) - 3) * 0.45deg))
    skewX(calc((var(--marker-seed, 0) - 3) * -0.25deg));

  filter: saturate(1.05);
}

.marker-title::after {
  content: "";
  position: absolute;
  left: -0.18em;
  right: -0.05em;
  bottom: 0.05em;
  height: 0.62em;
  border-radius: 0.18em;
  z-index: -1;

  background: linear-gradient(
    90deg,
    rgba(253, 230, 138, 0) 0%,
    rgba(253, 230, 138, 0.6) 8%,
    rgba(253, 230, 138, 0.55) 60%,
    rgba(253, 230, 138, 0.35) 100%
  );

  opacity: 0.75;
  mix-blend-mode: multiply;
  transform: rotate(calc((var(--marker-seed, 0) - 3) * 0.45deg))
    translateY(0.02em);

  mask-image: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 1) 20%,
    rgba(0, 0, 0, 1) 100%
  );
}

@media (prefers-reduced-motion: no-preference) {
  .post-link:hover .marker-title::before,
  .post-link:hover .marker-title::after {
    filter: saturate(1.08) contrast(1.02);
  }
}

/* Mermaid Styles */
.mermaid-container svg {
  width: 100% !important;
  max-width: 100%;
  height: auto;
  display: block;
  background-color: transparent !important;
}

.mermaid-container rect,
.mermaid-container circle,
.mermaid-container ellipse,
.mermaid-container polygon,
.mermaid-container path,
.mermaid-container .actor,
.mermaid-container .node {
  fill: white !important;
  stroke: #cbd5e1 !important;
  stroke-width: 1.5px !important;
}

.mermaid-container .edgePath .path,
.mermaid-container .messageLine0,
.mermaid-container .messageLine1,
.mermaid-container .flowchart-link {
  stroke: #cbd5e1 !important;
  stroke-width: 1.5px !important;
}

.mermaid-container text,
.mermaid-container .label,
.mermaid-container .labelText,
.mermaid-container .edgeLabel,
.mermaid-container .node text,
.mermaid-container tspan {
  font-family: "Inter", sans-serif !important;
  fill: #334155 !important;
  color: #334155 !important;
  stroke: none !important;
  font-size: 16px !important;
}

.mermaid-container .marker,
.mermaid-container marker path {
  fill: #cbd5e1 !important;
  stroke: #cbd5e1 !important;
}

/* Generic Embed Styles */
.generic-embed {
  --max-width: 100%;
  --border-radius: 24px;
  --bg-color: #ffffff;
  --border-color: #e2e8f0;
  --shadow: none;

  margin: 1.5rem 0;
  width: 100%;
  max-width: var(--max-width);
}

.embed-wrapper {
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all 0.2s ease;
  position: relative;
}

.generic-embed[data-type="video"] .embed-wrapper {
  aspect-ratio: 16/9;
  height: 0;
  padding-bottom: 56.25%;
  /* 16:9 */
}

.generic-embed[data-type="video"] .embed-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.embed-wrapper:hover {
  box-shadow:
    0 4px 6px -1px rgb(0 0 0 / 0.1),
    0 2px 4px -2px rgb(0 0 0 / 0.1);
  border-color: #cbd5e1;
}

.generic-embed[data-provider="youtube.com"] {
  --bg-color: #000000;
}

.generic-embed[data-provider="vimeo.com"] {
  --bg-color: #1a1a1a;
}

.generic-embed[data-provider="codepen.io"] {
  --bg-color: #1e1e1e;
  --border-color: #333;
}

.embed-fallback {
  padding: 1.5rem;
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: var(--border-radius);
  text-align: center;
}

.fallback-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: #64748b;
  font-size: 0.875rem;
}

.fallback-link {
  @apply text-slate-900 underline underline-offset-4;
  text-decoration: none;
  font-weight: 500;
  margin-top: 0.25rem;
  word-break: break-all;
}

.fallback-link:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .generic-embed {
    margin: 1rem 0;
  }

  .embed-fallback {
    padding: 1rem;
  }

  .embed-wrapper:hover {
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  }
}

/* File Example Styles */
[data-file-example] {
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04);
}

.copy-btn,
.download-btn {
  color: #475569;
}

.copy-btn[data-copied="true"] {
  color: #065f46;
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.35);
}

/* Prism.js syntax highlighting - light, low-noise */
code[class*="language-"],
pre[class*="language-"],
pre:has(code[class*="language-"]) {
  color: #0f172a;
  background: transparent;
  text-shadow: none;
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.8125rem;
  line-height: 1.65;
  direction: ltr;
  text-align: left;
  white-space: pre;
  word-spacing: normal;
  word-break: normal;
  tab-size: 2;
  hyphens: none;
}

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: #64748b;
  font-style: italic;
}

.token.punctuation {
  color: #94a3b8;
}

.token.operator {
  color: #64748b;
}

.token.property,
.token.tag,
.token.constant,
.token.symbol,
.token.deleted {
  color: #c2410c;
}

.token.boolean,
.token.number {
  color: #a16207;
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
  color: #059669;
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string {
  color: #475569;
}

.token.atrule,
.token.attr-value,
.token.keyword {
  color: #7c3aed;
  font-weight: 500;
}

.token.function,
.token.class-name {
  color: #2563eb;
}

.token.regex,
.token.important,
.token.variable {
  color: #db2777;
}

/* ═══════════════════════════════════════════════
   TECH AESTHETIC – Animation Keyframes
   ═══════════════════════════════════════════════ */

/* Gradient Mesh Blob Animations */
@keyframes gradient-blob-1 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  25% {
    transform: translate(30px, -20px) scale(1.05);
  }

  50% {
    transform: translate(-15px, 25px) scale(0.95);
  }

  75% {
    transform: translate(20px, 15px) scale(1.02);
  }
}

@keyframes gradient-blob-2 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(-25px, 15px) scale(1.03);
  }

  66% {
    transform: translate(20px, -20px) scale(0.97);
  }
}

@keyframes gradient-blob-3 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  20% {
    transform: translate(15px, 10px) scale(1.06);
  }

  40% {
    transform: translate(-10px, 20px) scale(0.98);
  }

  60% {
    transform: translate(25px, -15px) scale(1.02);
  }

  80% {
    transform: translate(-20px, -10px) scale(0.96);
  }
}

/* Binary Stream Scroll */
@keyframes binary-scroll {
  0% {
    transform: translateY(-50%);
  }

  100% {
    transform: translateY(0%);
  }
}

/* Circuit Pulse (used for node glow effects) */
@keyframes circuit-pulse {
  0%,
  100% {
    opacity: 0.2;
    box-shadow: 0 0 0 0 rgba(148, 163, 184, 0);
  }

  50% {
    opacity: 0.5;
    box-shadow: 0 0 12px 2px rgba(148, 163, 184, 0.15);
  }
}

/* Data Packet Flow */
@keyframes data-packet-flow {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100vw);
  }
}

/* Tech Border Glow */
@keyframes border-trace {
  0% {
    background-position: 0% 50%;
  }

  100% {
    background-position: 200% 50%;
  }
}

/* Section Fade-In Glow */
@keyframes section-glow {
  0% {
    opacity: 0;
  }

  50% {
    opacity: 0.08;
  }

  100% {
    opacity: 0;
  }
}

/* Tailwind-compatible animation classes */
.animate-gradient-blob-1 {
  animation: gradient-blob-1 20s ease-in-out infinite;
}

.animate-gradient-blob-2 {
  animation: gradient-blob-2 25s ease-in-out infinite;
}

.animate-gradient-blob-3 {
  animation: gradient-blob-3 30s ease-in-out infinite;
}

.animate-circuit-pulse {
  animation: circuit-pulse 3s ease-in-out infinite;
}

.animate-border-trace {
  animation: border-trace 4s linear infinite;
}

/* Glassmorphism Utilities */
.glass {
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(226, 232, 240, 0.5);
}

.glass-subtle {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(241, 245, 249, 0.8);
}

.glass-dark {
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Tech Border – animated gradient trace */
.tech-border {
  position: relative;
}

.tech-border::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(148, 163, 184, 0.3) 25%,
    rgba(191, 206, 228, 0.2) 50%,
    rgba(148, 163, 184, 0.3) 75%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: border-trace 4s linear infinite;
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* Noise texture overlay */
.noise-overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1;
}

/* ═══════════════════════════════════════════════
   ABSTRACT CIRCUIT – Trace Pulse Animations
   ═══════════════════════════════════════════════ */

@keyframes tracePulse1 {
  0% {
    stroke-dashoffset: 1280;
  }

  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes tracePulse2 {
  0% {
    stroke-dashoffset: 650;
  }

  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes tracePulse3 {
  0% {
    stroke-dashoffset: 1280;
  }

  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes tracePulse4 {
  0% {
    stroke-dashoffset: 440;
  }

  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes junctionGlow {
  0%,
  100% {
    opacity: 0.1;
  }

  50% {
    opacity: 0.4;
  }
}

/* ── Binary micro-interactions ─────────────────────────────────────────────── */

/* Digits that fly out from a pressed link or button (see BitBurst). */
.bit-burst {
  position: fixed;
  z-index: 200;
  pointer-events: none;
  /* On the layer, not the digits: a fixed layer blends as a whole with the page. */
  mix-blend-mode: difference;
}
.bit-burst span {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-jetbrains-mono), ui-monospace, monospace;
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
  opacity: 0;
  animation: bit-burst-fly 620ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes bit-burst-fly {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy)))
      scale(0.6);
  }
}

/* Light that follows the pointer on a `data-glow` surface (see BitGlow). */
.bit-glow {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity 400ms ease;
}
@media (hover: hover) {
  [data-glow]:hover > .bit-glow {
    opacity: 1;
  }
}
/* Dark surfaces: the dot grid lights up around the pointer. */
.bit-glow-dots {
  background-image:
    radial-gradient(
      320px circle at var(--gx, 50%) var(--gy, 50%),
      rgba(148, 163, 184, 0.22),
      transparent 70%
    ),
    radial-gradient(#e2e8f0 1.25px, transparent 1.25px);
  background-size:
    auto,
    20px 20px;
  -webkit-mask-image: radial-gradient(
    280px circle at var(--gx, 50%) var(--gy, 50%),
    #000,
    transparent 75%
  );
  mask-image: radial-gradient(
    280px circle at var(--gx, 50%) var(--gy, 50%),
    #000,
    transparent 75%
  );
}
/* Cards: only the border lights up, in the card's text colour. */
.bit-glow-edge {
  inset: -1px;
  padding: 2px;
  background: radial-gradient(
    320px circle at var(--gx, 50%) var(--gy, 50%),
    currentColor,
    transparent 70%
  );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#000 0 0) content-box exclude,
    linear-gradient(#000 0 0);
}
/* Dark buttons: a spot of light under the pointer. */
.bit-glow-spot {
  background: radial-gradient(
    90px circle at var(--gx, 50%) var(--gy, 50%),
    rgba(129, 140, 248, 0.5),
    transparent 70%
  );
}

@media (prefers-reduced-motion: reduce) {
  .bit-burst,
  .bit-glow {
    display: none;
  }
}

/*
 * Calls to action: a light travels round the edge of the pill and glows softly
 * behind it; on hover the glow comes up. `bit-cta-light` is for white pills on
 * dark surfaces, `bit-cta-quiet` only lights up on hover.
 */
@property --cta-angle {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}
.bit-cta {
  --cta-a: rgba(129, 140, 248, 0.95);
  --cta-b: #ffffff;
  position: relative;
  isolation: isolate;
}
.bit-cta-light {
  --cta-a: rgba(99, 102, 241, 0.95);
  --cta-b: #312e81;
}
.bit-cta-quiet {
  --cta-a: rgba(99, 102, 241, 0.9);
  --cta-b: #0f172a;
}
.bit-cta::before,
.bit-cta::after {
  content: "";
  position: absolute;
  border-radius: inherit;
  pointer-events: none;
  background: conic-gradient(
    from var(--cta-angle),
    transparent 0 58%,
    var(--cta-a) 76%,
    var(--cta-b) 86%,
    var(--cta-a) 93%,
    transparent 100%
  );
  animation: bit-cta-turn 6s linear infinite;
}
/* The edge itself. */
.bit-cta::before {
  inset: -1px;
  padding: 1.5px;
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#000 0 0) content-box exclude,
    linear-gradient(#000 0 0);
}
/* The glow behind the edge. */
.bit-cta::after {
  inset: -2px;
  z-index: -1;
  padding: 6px;
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#000 0 0) content-box exclude,
    linear-gradient(#000 0 0);
  filter: blur(10px);
  opacity: 0.55;
  transition: opacity 300ms ease;
}
.bit-cta-quiet::before,
.bit-cta-quiet::after {
  opacity: 0;
  transition: opacity 300ms ease;
}
@media (hover: hover) {
  .bit-cta:hover::after,
  .group:hover > .bit-cta::after {
    opacity: 1;
  }
  .bit-cta-quiet:hover::before {
    opacity: 1;
  }
  .bit-cta-quiet:hover::after {
    opacity: 0.6;
  }
}
@keyframes bit-cta-turn {
  to {
    --cta-angle: 360deg;
  }
}

/*
 * The contact address on a dark surface: a slow sheen runs through the letters
 * and a light travels along the underline. On hover the whole line lights up.
 */
.bit-mail {
  position: relative;
  display: inline-block;
  padding-bottom: 0.42em;
  background: linear-gradient(
    100deg,
    #ffffff 0 38%,
    #a5b4fc 50%,
    #ffffff 62% 100%
  );
  background-size: 260% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: bit-mail-sheen 7s ease-in-out infinite;
  transition: filter 300ms ease;
}
.bit-mail::before,
.bit-mail::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  border-radius: 4px;
  pointer-events: none;
}
/* The resting underline. */
.bit-mail::before {
  bottom: 1px;
  height: 2px;
  background: rgba(255, 255, 255, 0.26);
}
/* The light travelling along it. */
.bit-mail::after {
  bottom: 0;
  height: 4px;
  background: linear-gradient(
      90deg,
      transparent,
      #818cf8 30%,
      #ffffff 50%,
      #818cf8 70%,
      transparent
    )
    no-repeat;
  background-size: 42% 100%;
  filter: drop-shadow(0 0 8px rgba(129, 140, 248, 0.95));
  animation: bit-mail-run 3.8s ease-in-out infinite alternate;
  transition: background-size 400ms ease;
}
@media (hover: hover) {
  .bit-mail:hover {
    filter: drop-shadow(0 0 18px rgba(129, 140, 248, 0.7));
  }
  .bit-mail:hover::after {
    background-size: 100% 100%;
  }
}
@keyframes bit-mail-sheen {
  0%,
  100% {
    background-position: 100% 0;
  }
  50% {
    background-position: 0% 0;
  }
}
@keyframes bit-mail-run {
  from {
    background-position: -30% 0;
  }
  to {
    background-position: 130% 0;
  }
}

/* Slow light drifting over a dark picture (see PortraitSection). */
.bit-aurora {
  position: absolute;
  inset: -10%;
  pointer-events: none;
  mix-blend-mode: screen;
  background:
    radial-gradient(
      38% 46% at 38% 42%,
      rgba(99, 102, 241, 0.55),
      transparent 70%
    ),
    radial-gradient(
      30% 40% at 64% 72%,
      rgba(129, 140, 248, 0.35),
      transparent 70%
    );
  filter: blur(40px);
  animation: bit-aurora-drift 16s ease-in-out infinite alternate;
}
@keyframes bit-aurora-drift {
  from {
    transform: translate3d(-4%, -3%, 0) scale(1);
  }
  to {
    transform: translate3d(5%, 4%, 0) scale(1.12);
  }
}

/* The current station on the career line: a node that breathes light. */
.bit-node-live {
  animation: bit-node-breathe 3.2s ease-in-out infinite;
}
@keyframes bit-node-breathe {
  0%,
  100% {
    box-shadow:
      0 0 0 4px rgba(129, 140, 248, 0.22),
      0 0 18px 2px rgba(129, 140, 248, 0.55);
  }
  50% {
    box-shadow:
      0 0 0 8px rgba(129, 140, 248, 0.12),
      0 0 34px 8px rgba(129, 140, 248, 0.85);
  }
}

/*
 * SwipeRow: on phones equal items stand side by side and are swiped through,
 * with the next one peeking in. From tablet width on the slide wrappers
 * dissolve and the items sit in the grid the row was given.
 */
@media (max-width: 767px) {
  .swipe-row {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    /* Bleed to the screen edges, but start in line with the text. */
    margin-inline: -1.25rem;
    padding-inline: 1.25rem;
    scroll-padding-inline: 1.25rem;
    scrollbar-width: none;
  }
  .swipe-row::-webkit-scrollbar {
    display: none;
  }
  .swipe-slide {
    flex: 0 0 82%;
    scroll-snap-align: start;
  }
}
@media (min-width: 768px) {
  .swipe-slide {
    display: contents;
  }
}

/*
 * The story thread (see StoryThread): a trace down the page like a track on a
 * circuit board. Indigo on light sections, light on dark ones.
 */
.story-thread {
  --thread-ink: #4f46e5;
  --thread-ground: #ffffff;
}
.story-thread-on-light {
  --thread-ink: #4f46e5;
  --thread-ground: #ffffff;
}
.story-thread-on-dark {
  --thread-ink: #c7d2fe;
  --thread-ground: #0f172a;
}
.story-thread path,
.story-thread line {
  stroke: var(--thread-ink);
  stroke-width: 1.75;
  stroke-linecap: square;
  stroke-linejoin: miter;
}
/* The second track of the bus. */
.story-thread path.story-thread-bus {
  stroke-width: 1;
  opacity: 0.38;
}
/* Solder points where the track bends or branches. */
.story-thread-pad {
  fill: var(--thread-ground);
  stroke: var(--thread-ink);
  stroke-width: 1.75;
  opacity: 0;
  transition: opacity 250ms ease;
}
/* What makes a figure a component: its pins and its number in binary. */
.story-thread-part {
  opacity: 0;
  transition: opacity 500ms ease 350ms;
}
.story-thread-part text {
  fill: var(--thread-ink);
  font-family: var(--font-jetbrains-mono), ui-monospace, monospace;
  font-weight: 700;
  letter-spacing: 0.14em;
}
/* The bit that travels at the head of the track. */
.story-thread-bit {
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  margin: -9px 0 0 -9px;
  border-radius: 3px;
  background: #fde68a;
  color: #0f172a;
  font-family: var(--font-jetbrains-mono), ui-monospace, monospace;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  box-shadow:
    0 0 0 3px rgba(253, 230, 138, 0.25),
    0 0 18px 4px rgba(251, 191, 36, 0.8),
    0 0 40px 12px rgba(129, 140, 248, 0.5);
  transition: opacity 300ms ease;
  will-change: transform;
}

/*
 * Native feel: the page should behave like a well-made app on every input type.
 */
html {
  color-scheme: light;
  /* Anchor jumps stop below the fixed header. */
  scroll-padding-top: 6rem;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  accent-color: #0f172a;
  caret-color: #0f172a;
}

body {
  text-rendering: optimizeLegibility;
  font-kerning: normal;
}

/* Headlines break into even lines, running text avoids lonely last words. */
h1,
h2,
h3,
h4 {
  text-wrap: balance;
}
p,
li,
dd,
summary {
  text-wrap: pretty;
}

/* Controls react at once to a tap and are not selected like text. */
a,
button,
summary,
[role="tab"],
[role="button"] {
  touch-action: manipulation;
}
button,
summary,
[role="tab"],
[role="button"],
a[href^="#"] {
  -webkit-user-select: none;
  user-select: none;
}

/* Decoration is neither selectable nor draggable. */
[aria-hidden="true"],
canvas,
img,
svg {
  -webkit-user-select: none;
  user-select: none;
}
img,
svg,
a {
  -webkit-user-drag: none;
}

/* One visible keyboard focus, none for mouse and touch. */
:focus:not(:focus-visible) {
  outline: none;
}
:focus-visible {
  outline: 2px solid #0f172a;
  outline-offset: 3px;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  border-radius: 6px;
}

/* A short press-in on anything that can be pressed. */
@media (prefers-reduced-motion: no-preference) {
  button:active,
  [role="tab"]:active,
  a[class*="rounded-full"]:active,
  a:active > [class*="rounded-full"] {
    scale: 0.97;
    transition-duration: 80ms;
  }
}

/* Dark surfaces: light selection, light focus ring, dark system controls. */
.bg-slate-900,
.bg-slate-950 {
  color-scheme: dark;
}
.bg-slate-900 ::selection,
.bg-slate-950 ::selection {
  background: #f8fafc;
  color: #0f172a;
}
.bg-slate-900 :focus-visible,
.bg-slate-950 :focus-visible {
  outline-color: #f8fafc;
}

/* Fixed controls stay clear of the home indicator and rounded corners. */
@supports (padding: env(safe-area-inset-bottom)) {
  body {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
}