/* ===== Portfolio — Bug Builder (refreshed design) ===== */

/* ---------- Design tokens ---------- */
:root {
  --color-bg: #070809;
  --color-bg-elevated: #0e1012;
  --color-bg-card: #111315;
  --color-primary: #fafaf9;
  --color-accent: #f59e0b;
  --color-accent-dim: rgba(245, 158, 11, 0.15);
  --color-accent-glow: rgba(245, 158, 11, 0.25);
  --color-text: #a8a29e;
  --color-muted: #57534e;
  --color-border: rgba(245, 158, 11, 0.12);
  --color-border-subtle: rgba(255, 255, 255, 0.06);

  --step-0: clamp(1rem, 0.95rem + 0.25vw, 1.25rem);
  --step-1: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --step-2: clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  --step-3: clamp(1.875rem, 1.6rem + 1.2vw, 2.5rem);
  --step-4: clamp(2.25rem, 1.9rem + 1.5vw, 3.25rem);
  --step-5: clamp(3rem, 2.5rem + 2vw, 4.5rem);

  --space-s: clamp(0.75rem, 0.7rem + 0.25vw, 1rem);
  --space-m: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  --space-l: clamp(1.75rem, 1.5rem + 0.75vw, 2.25rem);
  --space-xl: clamp(2.5rem, 2rem + 1vw, 3.5rem);
  --space-2xl: clamp(3.5rem, 2.75rem + 1.5vw, 5rem);
  --space-3xl: clamp(5rem, 4rem + 2vw, 7rem);

  --font-sans: "Outfit", system-ui, sans-serif;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-s: 0.2s;
  --duration-m: 0.4s;
  --duration-l: 0.6s;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --scroll-offset: 5rem;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-s: 0.01s;
    --duration-m: 0.05s;
    --duration-l: 0.1s;
  }
}

/* ---------- Base ---------- */
* {
  box-sizing: border-box;
  margin: 0;
}

html {
  block-size: 100%;
  color: var(--color-text);
  background: var(--color-bg);
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  min-block-size: 100%;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.65;
  overflow-x: clip;
}

/* Background: subtle gradient orbs */
.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 70% 40% at 50% -10%, var(--color-accent-dim), transparent 55%),
    radial-gradient(ellipse 50% 30% at 90% 80%, rgba(245, 158, 11, 0.06), transparent 50%);
  animation: bgPulse 14s ease-in-out infinite;
}

@keyframes bgPulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bg-glow {
    animation: none;
  }
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  opacity: 0.85;
}

/* ---------- Sticky nav: starts at second section (after hero), sticks on scroll ---------- */
/* Placed in DOM after .hero so it only appears when user scrolls to About section */
.stuck-top {
  position: sticky;
  position: -webkit-sticky;
  top: 0;
  top: max(var(--space-s), env(safe-area-inset-top));
  z-index: 10;
  container-type: scroll-state;
}

.stuck-top>nav {
  transition:
    background-color 0.3s ease,
    box-shadow 0.3s ease,
    margin 0.3s ease,
    border-radius 0.3s ease,
    padding 0.3s ease;
  /* Stuck state: bar style (also fallback when scroll-state not supported) */
  background-color: transparent;
}

@container scroll-state(stuck: top) {
  .stuck-top>nav {
    background-color: var(--color-bg-elevated);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-lg);
    margin-inline: 20px;
  }
}

/* Scroll-spy: highlight nav item for current section */
body {
  timeline-scope: --section-about, --section-work, --section-contact;
}

@keyframes nav-highlight {

  25%,
  50% {
    border-block-end-color: var(--color-accent);
    color: var(--color-primary);
  }
}

.stuck-top nav>a {
  animation: nav-highlight linear both;
  animation-range: cover 20% exit-crossing 50%;
  border-block-end: 3px solid transparent;
}

.stuck-top nav>a:nth-child(1) {
  animation-timeline: --section-about;
}

.stuck-top nav>a:nth-child(2) {
  animation-timeline: --section-work;
}

.stuck-top nav>a:nth-child(3) {
  animation-timeline: --section-contact;
}

.stuck-top nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-evenly;
  gap: 0.5rem 1rem;
  padding: var(--space-s) var(--space-l);
  min-height: 3rem;
}

.stuck-top nav>a {
  font-size: var(--step-1);
  font-weight: 500;
  color: var(--color-muted);
  transition: color var(--duration-s) ease;
  padding: 0.5em 0.4em;
  min-block-size: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  position: relative;
}

.stuck-top nav>a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 3px;
  background: var(--color-accent);
  transform: translateX(-50%);
  transition: width var(--duration-m) var(--ease-out-expo);
}

.stuck-top nav>a:hover::after,
.stuck-top nav>a:focus-visible::after {
  width: 80%;
}

/* ---------- Hero: entrance animations ---------- */
.hero {
  position: relative;
  z-index: 1;
  display: grid;
  place-content: center;
  text-align: center;
  gap: var(--space-s);
  block-size: 100vh;
  block-size: 100svh;
  block-size: 100dvh;
  padding: var(--space-l);
  padding-inline: max(var(--space-l), env(safe-area-inset-left));
}

.hero__name {
  font-family: var(--font-display);
  font-size: var(--step-5);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  word-break: keep-all;
  overflow-wrap: normal;
  opacity: 0;
  transform: translateY(1.25rem);
  animation: heroName var(--duration-l) var(--ease-out-expo) forwards;
}

.hero__tagline {
  font-size: var(--step-2);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateY(0.75rem);
  animation: heroTagline var(--duration-l) var(--ease-out-expo) 0.12s forwards;
}

.hero__alias {
  font-size: var(--step-1);
  font-family: ui-monospace, monospace;
  color: var(--color-muted);
  opacity: 0;
  transform: translateY(0.75rem);
  animation: heroAlias var(--duration-l) var(--ease-out-expo) 0.3s forwards;
}

.hero__cta {
  font-size: var(--step-0);
  color: var(--color-muted);
  opacity: 0;
  animation: heroCta var(--duration-m) ease-out 0.45s forwards;
}

.hero__cta a,
.hero__link {
  color: var(--color-accent);
  position: relative;
}

.hero__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--duration-m) var(--ease-out-expo);
}

.hero__link:hover::after {
  transform: scaleX(1);
}

@keyframes heroName {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroTagline {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroAlias {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroCta {
  to {
    opacity: 1;
  }
}

/* ---------- Sections: one full page each ---------- */
.section {
  min-block-size: 100vh;
  min-block-size: 100svh;
  min-block-size: 100dvh;
  display: grid;
  align-items: center;
  padding: var(--space-2xl) var(--space-l);
  padding-inline: max(var(--space-l), env(safe-area-inset-left));
  /* Space so section content never sits under sticky header */
  padding-top: var(--scroll-offset);
}

/* All sections: top appears below header when navigating from nav */
.section {
  scroll-margin-top: var(--scroll-offset);
}

.section__inner {
  max-width: 720px;
  margin-inline: auto;
  width: 100%;
  padding-inline: 0.5rem;
  opacity: 0;
  transform: translateY(1.5rem);
  transition:
    opacity var(--duration-l) var(--ease-out-expo),
    transform var(--duration-l) var(--ease-out-expo);
}

.section.is-visible .section__inner {
  opacity: 1;
  transform: translateY(0);
}

.section__inner--contact {
  text-align: center;
}

.section__inner--contact .section__lead {
  margin-bottom: var(--space-m);
}

.section__inner--contact p {
  margin-bottom: var(--space-s);
}

.section h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-bottom: var(--space-m);
}

.section__lead {
  font-size: var(--step-1);
  color: var(--color-muted);
  margin-bottom: var(--space-l);
}

.section p {
  margin-bottom: var(--space-m);
}

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

/* About: short principle list */
.about-principles {
  list-style: none;
  padding: 0;
  margin: var(--space-m) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.about-principles li {
  font-size: var(--step-0);
  color: var(--color-text);
  padding-inline-start: 1rem;
  position: relative;
}

.about-principles li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-accent-glow);
}

.link-back {
  display: inline-block;
  margin-top: var(--space-l);
  font-weight: 500;
}

/* Animated underline for links */
.link--underline {
  position: relative;
}

.link--underline::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-m) var(--ease-out-expo);
}

.link--underline:hover::after,
.link--underline:focus-visible::after {
  transform: scaleX(1);
}

/* ---------- Expertise: infinite-loop marquee lanes ---------- */
/* Each track has exactly 2 duplicate sets; animation moves by 50% for seamless loop. */

.expertise-section {
  min-block-size: auto;
  padding-top: var(--scroll-offset);
  padding-bottom: var(--space-xl);
  align-items: start;
}

.expertise-section .section__title {
  letter-spacing: 0.08em;
}

/* ---------- Work: tech stack container ---------- */
.expertise-container {
  margin-top: var(--space-l);
  padding: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}

.expertise-container__header {
  padding: var(--space-m) var(--space-l);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  background: linear-gradient(180deg, rgba(45, 212, 191, 0.06) 0%, transparent 100%);
}

.expertise-container__title {
  font-size: var(--step-1);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin: 0 0 0.2rem;
}

.expertise-container__subtitle {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin: 0;
}

.expertise-container--stack .stack-strips {
  padding-top: 0.25rem;
}

.expertise-container--stack .expertise-strip {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* Lane: colored bar + label + marquee (fixed label width so all strips align) */
.expertise-strip {
  --lane-accent: var(--color-accent);
  --strip-label-width: 10rem;
  display: grid;
  grid-template-columns: 4px var(--strip-label-width) 1fr;
  align-items: stretch;
  min-height: 2.75rem;
  overflow: hidden;
}

.expertise-strip--frontend {
  --lane-accent: #38bdf8;
}

.expertise-strip--backend {
  --lane-accent: #f59e0b;
}

.expertise-strip--devops {
  --lane-accent: #f97316;
}

.expertise-strip::before {
  content: "";
  background: var(--lane-accent);
  opacity: 0.9;
  box-shadow: 0 0 16px var(--color-accent-glow);
}

.expertise-strip__label {
  display: flex;
  align-items: center;
  padding: 0 var(--space-m);
  background: rgba(0, 0, 0, 0.25);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--lane-accent);
  flex-shrink: 0;
  width: 100%;
  min-width: 0;
}

/* Infinite marquee: 2 copies per track, translate 50% = one set width (seamless loop) */
.expertise-strip .tech-marquee--infinite {
  --marquee-duration: 36s;
  --marquee-gap: 0.65rem;
  min-width: 0;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
}

.expertise-strip .tech-marquee__track {
  display: flex;
  width: max-content;
  flex-wrap: nowrap;
  gap: 0;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-fill-mode: none;
}

.expertise-strip .tech-marquee--infinite .tech-marquee__track {
  animation: expertiseMarqueeRight var(--marquee-duration) linear infinite;
}

.expertise-strip .tech-marquee--infinite .tech-marquee__track--left {
  animation: expertiseMarqueeLeft var(--marquee-duration) linear infinite;
}

.expertise-strip--frontend .tech-marquee__track { animation-delay: 0s; }
.expertise-strip--backend .tech-marquee__track { animation-delay: -12s; }
.expertise-strip--devops .tech-marquee__track { animation-delay: -22s; }

@keyframes expertiseMarqueeRight {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes expertiseMarqueeLeft {
  0%   { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

@media (prefers-reduced-motion: reduce) {
  .expertise-strip .tech-marquee__track {
    animation-duration: 80s;
  }
}

/* No gap between the two duplicate sets so 50% = exactly one set width */
.expertise-strip .tech-marquee__set {
  display: flex;
  align-items: center;
  gap: var(--marquee-gap);
  flex-shrink: 0;
  padding: 0 0.25rem;
  margin: 0;
}

.expertise-strip .tech-marquee__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
  padding: 0.4rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text);
  background: rgba(7, 8, 9, 0.6);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  transition: border-color var(--duration-s) ease, box-shadow var(--duration-s) ease, background var(--duration-s) ease;
}

.expertise-strip .tech-marquee__item:hover {
  border-color: var(--lane-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
  background: rgba(17, 19, 21, 0.9);
}

.expertise-strip .tech-marquee__item img {
  width: 1.15rem;
  height: 1.15rem;
  object-fit: contain;
  flex-shrink: 0;
  opacity: 0.92;
}

@media (max-width: 640px) {
  .expertise-container__header {
    padding: var(--space-s) var(--space-m);
  }

  .expertise-strip {
    grid-template-columns: 4px 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas: "bar label" "bar marquee";
  }

  .expertise-strip::before {
    grid-area: bar;
    grid-row: 1 / -1;
  }

  .expertise-strip__label {
    grid-area: label;
    min-width: 0;
    padding: var(--space-s) var(--space-m);
  }

  .expertise-strip .tech-marquee {
    grid-area: marquee;
  }
}

@media (max-width: 480px) {
  .expertise-strip .tech-marquee {
    --marquee-gap: 0.5rem;
  }

  .expertise-strip .tech-marquee__item {
    padding: 0.32rem 0.55rem;
    font-size: 0.72rem;
  }

  .expertise-strip .tech-marquee__item img {
    width: 1rem;
    height: 1rem;
  }
}

/* ---------- Experience section ---------- */
.experience-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience-item {
  --delay: calc(var(--i, 0) * 80ms);
  padding: var(--space-m) 0;
  border-block-end: 1px solid var(--color-border);
  line-height: 1.6;
  opacity: 0;
  transform: translateY(0.75rem);
  transition:
    opacity var(--duration-m) var(--ease-out-expo) var(--delay),
    transform var(--duration-m) var(--ease-out-expo) var(--delay);
}

.section.is-visible .experience-item {
  opacity: 1;
  transform: translateY(0);
}

.experience-item:last-of-type {
  border-block-end: none;
}

.experience-role {
  display: block;
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--step-1);
}

.experience-place,
.experience-time {
  font-size: var(--step-0);
  color: var(--color-muted);
}

.experience-time {
  margin-inline-start: 0.5rem;
}

.experience-item p {
  margin: 0.35em 0 0;
  font-size: var(--step-0);
}

.experience-focus {
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 0.5rem;
  margin-bottom: 0.25rem;
}

.experience-bullets {
  list-style: none;
  padding: 0;
  margin: 0.25rem 0 0;
}

.experience-bullets li {
  padding: 0.2rem 0;
  padding-inline-start: 1rem;
  position: relative;
  font-size: var(--step-0);
  color: var(--color-text);
}

.experience-bullets li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ---------- Engineering Philosophy ---------- */
.philosophy-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-l);
}

.philosophy-list li {
  padding: 0.4rem 0;
  padding-inline-start: 1.25rem;
  position: relative;
  font-size: var(--step-0);
  color: var(--color-text);
}

.philosophy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 2px;
  background: var(--color-accent);
}

/* ---------- Responsive: all devices ---------- */

/* Small phones (e.g. 320px–480px): header wraps, section text clear of nav */
@media (max-width: 480px) {
  :root {
    /* Taller nav when wrapped = more offset so section content stays below */
    --scroll-offset: 5.5rem;
  }

  .stuck-top {
    top: max(0.5rem, env(safe-area-inset-top));
  }

  .stuck-top nav {
    gap: 0.4rem 1rem;
    padding: 0.6rem 0.75rem;
    min-height: auto;
    padding-inline: max(0.75rem, env(safe-area-inset-left));
    justify-content: space-evenly;
  }

  .stuck-top nav>a {
    font-size: 0.8125rem;
    min-block-size: 2.5rem;
    padding: 0.4em 0.5em;
  }

  @container scroll-state(stuck: top) {
    .stuck-top>nav {
      margin-inline: max(0.5rem, env(safe-area-inset-left));
      border-radius: 10px;
    }
  }

  .hero {
    padding: var(--space-m);
    gap: 0.5rem;
  }

  .hero__name {
    letter-spacing: 0.04em;
  }

  .section {
    padding: var(--scroll-offset) var(--space-m) var(--space-xl);
    padding-top: max(var(--scroll-offset), 5rem);
  }

  .section__inner {
    padding-inline: 0.5rem;
  }

  .section h2 {
    font-size: var(--step-2);
  }

  .section__lead {
    font-size: var(--step-0);
  }

  .section__inner--contact p {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35em;
  }
}

/* Phones to small tablets (481px–768px): header sticks with safe area */
@media (min-width: 481px) and (max-width: 768px) {
  .stuck-top {
    top: max(var(--space-s), env(safe-area-inset-top));
  }

  .stuck-top nav {
    padding-inline: max(var(--space-m), env(safe-area-inset-left));
  }

  @container scroll-state(stuck: top) {
    .stuck-top>nav {
      margin-inline: max(1rem, env(safe-area-inset-left));
    }
  }

  .section {
    padding: var(--space-2xl) var(--space-m);
  }
}

/* Tablets and up (769px+) */
@media (min-width: 769px) {
  .stuck-top nav {
    padding-inline: max(var(--space-2xl), env(safe-area-inset-left));
  }

  @container scroll-state(stuck: top) {
    .stuck-top>nav {
      margin-inline: max(20px, env(safe-area-inset-left));
    }
  }
}

/* Large viewports: cap content width for readability */
@media (min-width: 1200px) {
  .section__inner {
    max-width: 720px;
  }
}

/* Touch: ensure tap targets and no hover-only reliance */
@media (hover: none) and (pointer: coarse) {
  .stuck-top nav>a {
    min-block-size: 2.75rem;
    min-inline-size: 2.75rem;
  }

  .hero__cta a,
  .link-back,
  .section__inner--contact a {
    min-block-size: 2.5rem;
    display: inline-flex;
    align-items: center;
  }
}