/* ==========================================================================
   Design tokens
   Dark by default: a deep blue-black canvas, three greys, one signal color
   for actions and a small set of hues for icons, projects and glows.
   The light theme only overrides color tokens.
   ========================================================================== */

:root {
  color-scheme: dark;

  /* Colors */
  --bg: #0b0d14;
  --surface: #12151e;
  --line: #1f2330;
  --line-strong: #363b4a;
  --text: #ededef;
  --text-muted: #a1a1aa; /* 7.6:1 on --bg */
  --text-faint: #8b8b94; /* 5.6:1 on --bg, still WCAG AA for small text */
  --accent: #d4ff3a; /* signal lime, reserved for actions and focus */
  --accent-hover: #e2ff7a;
  --accent-ink: var(--accent); /* accent used as a line or text color */
  --accent-soft: rgba(212, 255, 58, 0.07);
  --on-accent: #0a0a0b;

  /* Supporting hues: icons, project cards and the hero glow */
  --hue-lime: var(--accent-ink);
  --hue-teal: #5eead4;
  --hue-teal-soft: rgba(94, 234, 212, 0.1);
  --hue-violet: #a78bfa;
  --hue-rose: #fb7185;
  --hue-rose-soft: rgba(251, 113, 133, 0.1);
  --glow-lime: rgba(212, 255, 58, 0.08);
  --glow-violet: rgba(139, 92, 246, 0.16);
  --glow-teal: rgba(45, 212, 191, 0.09);
  --linkedin: #0a66c2;

  /* Brand colors for tech logos; near-black brands follow the text color */
  --brand-node: #5fa04e;
  --brand-express: var(--text);
  --brand-typescript: #3178c6;
  --brand-sqlite: #4ba3d8;
  --brand-html: #e34f26;
  --brand-css: #a37fe0;
  --brand-javascript: #f7df1e;
  --brand-chartjs: #ff6384;
  --brand-esbuild: #ffcf00;
  --brand-turso: #4ff8d2;
  --brand-zod: #408aff;
  --brand-jwt: var(--text);
  --brand-github-actions: #2088ff;

  /* Typography */
  --font-sans: 'Geist', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SFMono-Regular', monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;

  /* Layout */
  --container: 72rem;
  --gutter: 1rem;
  --radius: 14px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration: 0.35s;
}

[data-theme='light'] {
  color-scheme: light;

  --bg: #fafafa;
  --surface: #ffffff;
  --line: #e4e4e7;
  --line-strong: #c4c4cc;
  --text: #0a0a0b;
  --text-muted: #52525b; /* 7.4:1 on --bg */
  --text-faint: #6b6b74; /* 5.0:1 on --bg */
  --accent-hover: #c8f520;
  /* Lime is too light for lines and text on white; a deep olive keeps contrast */
  --accent-ink: #4d7c0f;
  --accent-soft: rgba(77, 124, 15, 0.06);

  /* Darker hues keep text and icons readable on white */
  --hue-teal: #0f766e;
  --hue-teal-soft: rgba(15, 118, 110, 0.08);
  --hue-violet: #6d28d9;
  --hue-rose: #e11d48;
  --hue-rose-soft: rgba(225, 29, 72, 0.07);
  --glow-lime: rgba(132, 204, 22, 0.12);
  --glow-violet: rgba(139, 92, 246, 0.1);
  --glow-teal: rgba(20, 184, 166, 0.1);

  --brand-sqlite: #003b57;
  --brand-css: #663399;
  --brand-javascript: #d4b106;
  --brand-esbuild: #d9a700;
  --brand-turso: #0fa88a;
}

@media (min-width: 40em) {
  :root {
    --gutter: 2rem;
  }
}

@media (min-width: 64em) {
  :root {
    --gutter: 3rem;
  }
}

/* ==========================================================================
   Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  position: relative;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

ul {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 3px;
  border-radius: 4px;
}

main:focus {
  outline: none;
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* Soft color glow behind the top of the page, full viewport width.
   --glow-shift is animated (see Motion) where @property is supported. */
@property --glow-shift {
  syntax: '<length>';
  inherits: false;
  initial-value: 0px;
}

body::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  z-index: -1;
  height: 52rem;
  background:
    radial-gradient(
      38rem 26rem at calc(14% + var(--glow-shift)) 22rem,
      var(--glow-violet),
      transparent 70%
    ),
    radial-gradient(
      34rem 24rem at calc(80% - var(--glow-shift)) 8rem,
      var(--glow-teal),
      transparent 70%
    ),
    radial-gradient(
      30rem 20rem at 46% calc(30rem + var(--glow-shift)),
      var(--glow-lime),
      transparent 70%
    );
  pointer-events: none;
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: var(--gutter);
  z-index: 10;
  padding: 0.5rem 0.875rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background: var(--accent);
  color: var(--on-accent);
  border-radius: 8px;
  transform: translateY(-200%);
}

.skip-link:focus-visible {
  transform: none;
}

/* Every top-level block shares one centered column */
.site-header,
main > section,
.site-footer {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 1.25rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.wordmark {
  font-weight: 500;
  letter-spacing: -0.01em;
}

.wordmark-accent {
  color: var(--accent-ink);
}

.local-time {
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.local-time time {
  color: var(--text-muted);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Keeps the header on one line on the narrowest phones */
@media (max-width: 29.99em) {
  .local-time-place {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Theme switch: thumb sits on the moon when dark (checked), on the sun when light
   -------------------------------------------------------------------------- */

.theme-switch {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem; /* 44px touch target */
  padding: 0;
  background: none;
  border: 0;
  border-radius: 999px;
  color: var(--text-muted);
  cursor: pointer;
}

.theme-switch-track {
  position: relative;
  display: block;
  width: 3.25rem;
  height: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  transition: border-color var(--duration) var(--ease-out);
}

.theme-switch:hover .theme-switch-track {
  border-color: var(--text-muted);
}

.theme-switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 1.375rem;
  height: 1.375rem;
  background: var(--text);
  border-radius: 50%;
  transition: transform var(--duration) var(--ease-out);
}

.theme-switch[aria-checked='true'] .theme-switch-thumb {
  transform: translateX(1.5rem);
}

.theme-switch-icon {
  position: absolute;
  z-index: 1;
  top: 7px;
  width: 0.75rem;
  height: 0.75rem;
  transition: color var(--duration) var(--ease-out);
}

.theme-switch-icon--light {
  left: 7px;
}

.theme-switch-icon--dark {
  left: 31px;
}

/* The icon under the thumb is inverted to read as "selected" */
.theme-switch[aria-checked='false'] .theme-switch-icon--light,
.theme-switch[aria-checked='true'] .theme-switch-icon--dark {
  color: var(--bg);
}

/* Set briefly by script.js so a theme change crossfades instead of snapping */
.is-theme-changing *,
.is-theme-changing *::before,
.is-theme-changing *::after {
  transition:
    background-color var(--duration) var(--ease-out),
    border-color var(--duration) var(--ease-out),
    color var(--duration) var(--ease-out) !important;
}

.is-theme-changing .theme-switch-thumb {
  transition:
    transform var(--duration) var(--ease-out),
    background-color var(--duration) var(--ease-out) !important;
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  isolation: isolate;
  padding-block: 4.5rem 4rem;
}

/* Faint engineering grid that fades out from the top-left */
.hero::before {
  content: '';
  position: absolute;
  inset: -6rem 0 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(
    ellipse 70% 60% at 20% 20%,
    #000 0%,
    transparent 75%
  );
  opacity: 0.55;
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent-ink);
  box-shadow: 0 0 0 0 var(--accent-ink);
  animation: pulse 2.4s var(--ease-out) infinite;
}

@keyframes pulse {
  70% {
    box-shadow: 0 0 0 0.5rem transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

.hero-title {
  font-size: clamp(3rem, 13vw, 8.5rem);
  font-weight: 600;
  line-height: 0.92;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.hero-title-accent {
  color: var(--hue-teal);
}

@supports (background-clip: text) or (-webkit-background-clip: text) {
  .hero-title-accent {
    background: linear-gradient(
      100deg,
      var(--hue-lime) 0%,
      var(--hue-teal) 55%,
      var(--hue-violet) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.hero-lede {
  max-width: 36rem;
  margin-top: 1.75rem;
  font-size: clamp(1.0625rem, 2.2vw, 1.25rem);
  color: var(--text-muted);
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  min-height: 3rem;
  padding: 0 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    background-color var(--duration) var(--ease-out),
    border-color var(--duration) var(--ease-out),
    transform var(--duration) var(--ease-out);
}

.button:active {
  transform: scale(0.97);
}

.button--primary {
  background: var(--accent);
  color: var(--on-accent);
}

.button--primary:hover {
  background: var(--accent-hover);
}

.button--ghost {
  border-color: var(--line-strong);
  color: var(--text);
}

.button--ghost:hover {
  border-color: var(--text-muted);
}

.button-icon {
  width: 1rem;
  height: 1rem;
}

.button-arrow {
  transition: transform var(--duration) var(--ease-out);
}

.button--ghost:hover .button-arrow {
  transform: translateY(3px);
}

.facts {
  display: grid;
  gap: 1.25rem;
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.fact {
  --fact-color: var(--hue-lime);
}

.fact--teal {
  --fact-color: var(--hue-teal);
}

.fact--violet {
  --fact-color: var(--hue-violet);
}

.fact dt {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.fact-icon {
  flex: none;
  width: 0.9375rem;
  height: 0.9375rem;
  color: var(--fact-color);
}

.fact dd {
  font-size: 0.9375rem;
}

@media (min-width: 48em) {
  .hero {
    padding-block: 8rem 6rem;
  }

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

/* ==========================================================================
   Section heads
   ========================================================================== */

.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section-count {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-faint);
}

/* ==========================================================================
   Projects
   ========================================================================== */

.projects {
  padding-block: 2rem 5rem;
}

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

@media (min-width: 50em) {
  .project-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-list > li {
  display: flex;
}

.project-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 19rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--duration) var(--ease-out);
}

/* Each project has its own hue for the icon, number, top edge and glow */
.project-card--teal {
  --project-color: var(--hue-teal);
  --project-soft: var(--hue-teal-soft);
}

.project-card--rose {
  --project-color: var(--hue-rose);
  --project-soft: var(--hue-rose-soft);
}

/* Pointer-following glow; script.js feeds it --spotlight-x/y */
.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(
    28rem circle at var(--spotlight-x, 50%) var(--spotlight-y, 0%),
    var(--project-soft, var(--accent-soft)),
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--duration) var(--ease-out);
}

/* Thin colored edge along the top of the card */
.project-card::after {
  content: '';
  position: absolute;
  inset: 0 1.5rem auto;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--project-color, var(--accent-ink)),
    transparent
  );
  opacity: 0.6;
  transition: opacity var(--duration) var(--ease-out);
}

.project-card:hover::after,
.project-card:focus-visible::after {
  opacity: 1;
}

.project-card:hover,
.project-card:focus-visible {
  border-color: var(--line-strong);
}

.project-card:hover::before,
.project-card:focus-visible::before {
  opacity: 1;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.project-icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  color: var(--project-color);
  background: var(--project-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.project-icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.project-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--project-color, var(--text-faint));
}

.project-title {
  margin-top: 2rem;
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.project-description {
  max-width: 34rem;
  margin-top: 0.75rem;
  color: var(--text-muted);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 1.5rem;
}

.project-tags li {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.125rem 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.tag-logo {
  flex: none;
  width: 0.8125rem;
  height: 0.8125rem;
  fill: currentColor;
}

.tag-logo--node {
  color: var(--brand-node);
}
.tag-logo--express {
  color: var(--brand-express);
}
.tag-logo--typescript {
  color: var(--brand-typescript);
}
.tag-logo--sqlite {
  color: var(--brand-sqlite);
}
.tag-logo--html {
  color: var(--brand-html);
}
.tag-logo--css {
  color: var(--brand-css);
}
.tag-logo--javascript {
  color: var(--brand-javascript);
}
.tag-logo--chartjs {
  color: var(--brand-chartjs);
}
.tag-logo--esbuild {
  color: var(--brand-esbuild);
}
.tag-logo--turso {
  color: var(--brand-turso);
}
.tag-logo--zod {
  color: var(--brand-zod);
}
.tag-logo--jwt {
  color: var(--brand-jwt);
}
.tag-logo--github-actions {
  color: var(--brand-github-actions);
}

.project-host {
  margin-top: auto;
  padding-top: 2rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
  overflow-wrap: anywhere;
}

.project-arrow {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-faint);
  transition:
    transform var(--duration) var(--ease-out),
    color var(--duration) var(--ease-out);
}

.project-card:hover .project-arrow,
.project-card:focus-visible .project-arrow {
  color: var(--project-color, var(--accent-ink));
  transform: translate(3px, -3px);
}

@media (min-width: 48em) {
  .project-card {
    min-height: 24rem;
    padding: 2rem;
  }

  .project-arrow {
    top: 1.75rem;
    right: 2rem;
  }
}

/* ==========================================================================
   Contact / LinkedIn
   ========================================================================== */

.contact {
  padding-block: 2rem 5rem;
}

/* A panel whose border picks up a hint of lime and violet at the corners.
   The second background layer, clipped to the border box, draws the border. */
.contact-panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  gap: 2rem;
  padding: 1.75rem 1.25rem;
  border: 1px solid transparent;
  border-radius: calc(var(--radius) + 4px);
  background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(
        135deg,
        color-mix(in srgb, var(--hue-lime) 45%, var(--line)),
        var(--line) 40%,
        var(--line) 60%,
        color-mix(in srgb, var(--hue-violet) 55%, var(--line))
      )
      border-box;
}

/* Corner glow */
.contact-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(
    32rem 20rem at 100% 0%,
    var(--glow-violet),
    transparent 70%
  );
  pointer-events: none;
}

.contact-text {
  max-width: 32rem;
  margin-top: 0.75rem;
  color: var(--text-muted);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition:
    border-color var(--duration) var(--ease-out),
    background-color var(--duration) var(--ease-out);
}

.contact-link-logo {
  display: grid;
  flex: none;
  place-items: center;
  width: 3rem;
  height: 3rem;
  color: #fff;
  background: var(--linkedin);
  border-radius: 12px;
}

.contact-link-logo svg {
  width: 1.375rem;
  height: 1.375rem;
  fill: currentColor;
}

.contact-link-body {
  display: grid;
  flex: 1;
  min-width: 0;
  gap: 0.125rem;
}

.contact-link-label {
  font-size: clamp(1.125rem, 2.4vw, 1.375rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  transition: color var(--duration) var(--ease-out);
}

.contact-link-handle {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
  overflow-wrap: anywhere;
}

.contact-link-arrow {
  display: grid;
  flex: none;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.125rem;
  line-height: 1;
  color: var(--text-muted);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition:
    transform var(--duration) var(--ease-out),
    color var(--duration) var(--ease-out),
    background-color var(--duration) var(--ease-out),
    border-color var(--duration) var(--ease-out);
}

.contact-link:hover {
  border-color: var(--line-strong);
  background: var(--surface);
}

.contact-link:hover .contact-link-label {
  color: var(--accent-ink);
}

.contact-link:hover .contact-link-arrow,
.contact-link:focus-visible .contact-link-arrow {
  color: var(--on-accent);
  background: var(--accent);
  border-color: var(--accent);
  transform: translate(2px, -2px);
}

@media (min-width: 48em) {
  .contact-panel {
    grid-template-columns: 1fr minmax(0, 24rem);
    align-items: center;
    gap: 3rem;
    padding: 3rem;
  }

  .contact-link {
    padding: 1.25rem;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.5rem 2rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-faint);
}

/* ==========================================================================
   Motion
   All movement is opt-in: it only runs when the user has not asked for
   reduced motion, and scroll reveals only where the browser supports
   scroll-driven animations. Without either, everything is simply visible.
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  .hero > * {
    animation: rise 0.9s var(--ease-out) both;
  }

  .hero > :nth-child(2) {
    animation-delay: 0.06s;
  }

  .hero > :nth-child(3) {
    animation-delay: 0.12s;
  }

  .hero > :nth-child(4) {
    animation-delay: 0.18s;
  }

  .hero > :nth-child(5) {
    animation-delay: 0.24s;
  }

  body::before {
    animation: glow-drift 18s ease-in-out infinite alternate;
  }

  @supports (animation-timeline: view()) {
    .reveal {
      animation: rise linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 70%;
    }
  }
}

@keyframes glow-drift {
  to {
    --glow-shift: 4rem;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}