/* Dark portfolio: black bg, #121212 cards, lavender accent #9d72ff */
:root {
  --bg: #000000;
  --card: #121212;
  --accent: #9d72ff;
  --accent-soft: #c4a3ff;
  --accent-dim: rgba(157, 114, 255, 0.35);
  --text: #ffffff;
  --text-muted: #b4b4c0;
  --border-purple: rgba(157, 114, 255, 0.45);
  --pixel-bg: #121212;
  --header-shadow: rgba(0, 0, 0, 0.5);
  --section-alt-top: rgba(18, 18, 18, 0.65);
  --tag-bg: rgba(157, 114, 255, 0.06);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --font-brand: "Pacifico", cursive;
  --header-h: 72px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --section-pad: clamp(3.5rem, 8vw, 5.5rem);
}

[data-theme="light"] {
  --bg: #f4f2fb;
  --card: #ffffff;
  --accent: #7c4ddb;
  --accent-soft: #9d72ff;
  --accent-dim: rgba(124, 77, 219, 0.22);
  --text: #14141c;
  --text-muted: #4a4a58;
  --border-purple: rgba(124, 77, 219, 0.35);
  --pixel-bg: #e8e2f5;
  --header-shadow: rgba(20, 20, 40, 0.1);
  --section-alt-top: rgba(124, 77, 219, 0.06);
  --tag-bg: rgba(124, 77, 219, 0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--scroll-padding, calc(var(--header-h) + 16px));
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: -0.01em;
  color: var(--text-muted);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
.section-title,
.about-heading {
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #000;
  z-index: 100;
  font-weight: 600;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

.text-accent {
  color: var(--accent);
  font-weight: 600;
}

main a:not(.project-card--link):not(.btn):not(.logo):not(.social-link) {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--accent-dim);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

main a:not(.project-card--link):not(.btn):not(.logo):not(.social-link):hover {
  color: var(--accent-soft);
  border-bottom-color: var(--accent-soft);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border-purple);
  box-shadow: 0 8px 32px var(--header-shadow);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}

.logo {
  font-family: var(--font-brand);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: opacity 0.2s var(--ease), text-shadow 0.2s var(--ease);
}

.logo:hover {
  opacity: 0.92;
  text-shadow: 0 0 24px var(--accent-dim);
}

.nav {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem 1.75rem;
  margin: 0;
}

.nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  padding: 0.35rem 0.1rem;
  transition: color 0.2s var(--ease);
}

.nav a:hover {
  color: var(--accent-soft);
}

.nav a.is-active {
  color: var(--accent);
  font-weight: 600;
}

.theme-toggle {
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  margin: 0;
  border: 1px solid var(--border-purple);
  border-radius: var(--radius-pill);
  background: var(--card);
  color: var(--accent);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
    color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.theme-toggle:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-dim);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.theme-toggle__icon {
  grid-area: 1 / 1;
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.theme-toggle__icon--moon {
  opacity: 0;
  transform: scale(0.6);
}

[data-theme="light"] .theme-toggle__icon--sun {
  opacity: 0;
  transform: scale(0.6);
}

[data-theme="light"] .theme-toggle__icon--moon {
  opacity: 1;
  transform: scale(1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.35rem;
  min-height: 46px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease), transform 0.2s var(--ease),
    box-shadow 0.25s var(--ease);
}

.btn:active {
  transform: scale(0.98);
}

.btn-resume {
  flex-shrink: 0;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border-purple);
}

.btn-resume:hover {
  background: var(--accent);
  color: #0a0a0a;
  border-color: var(--accent);
  box-shadow: 0 0 28px var(--accent-dim);
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
  box-shadow: 0 0 32px rgba(157, 114, 255, 0.45);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-purple);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-soft);
  box-shadow: 0 0 20px var(--accent-dim);
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-block {
  padding: var(--section-pad) 0;
}

.section-alt {
  background: linear-gradient(
    180deg,
    var(--section-alt-top) 0%,
    var(--bg) 100%
  );
  border-block: 1px solid var(--border-purple);
}

/* About */
.section-about {
  padding-top: calc(var(--section-pad) + 0.5rem);
}

.about-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 880px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.about-heading {
  margin: 0 0 0.35rem;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
}

.about-email {
  margin: 0 0 1.25rem;
  font-size: 0.9375rem;
}

.about-lead {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.about-text {
  margin: 0 0 1rem;
  max-width: 52ch;
}

.about-text:last-of-type {
  margin-bottom: 1.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.pixel-frame {
  position: relative;
  padding: 1rem;
}

.pixel-art {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-purple);
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--accent-dim), 0 24px 60px var(--header-shadow);
}

.pixel-svg {
  display: block;
  width: min(280px, 100%);
  height: auto;
}

.pixel-deco {
  position: absolute;
  font-size: 1.25rem;
  color: var(--accent);
  opacity: 0.85;
  font-weight: 300;
}

.pixel-deco--x {
  top: 0;
  right: 8%;
}

.pixel-deco--o {
  bottom: 18%;
  left: 4%;
  font-size: 1.1rem;
}

.pixel-deco--x2 {
  top: 38%;
  left: 0;
  font-size: 1rem;
}

.section-title {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 2.8vw, 2rem);
}

.section-intro {
  margin: 0 0 2.25rem;
  color: var(--text-muted);
  max-width: 56ch;
  line-height: 1.7;
}

.section-block .section-title,
.section-block .section-intro {
  text-align: left;
}

/* Skill cards */
.skill-cards {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .skill-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.skill-card {
  background: var(--card);
  border: 1px solid var(--border-purple);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.65rem;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.skill-card:hover {
  border-color: rgba(157, 114, 255, 0.75);
  transform: translateY(-4px);
  box-shadow: 0 0 24px var(--accent-dim);
}

.skill-card__title {
  margin: 0 0 1.1rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
}

.skill-card__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-card__tags li {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  border: 1px solid var(--border-purple);
  border-radius: var(--radius-pill);
  background: var(--tag-bg);
}

/* Projects */
.project-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .project-grid:has(> :only-child) {
    grid-template-columns: 1fr;
    max-width: 26rem;
    margin-inline: auto;
  }
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border-purple);
  border-radius: var(--radius);
  padding: 1.5rem 1.55rem;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.project-card:hover {
  transform: translateY(-5px);
  border-color: rgba(157, 114, 255, 0.75);
  box-shadow: 0 0 28px var(--accent-dim);
}

.project-card--link {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  border-left: 3px solid var(--accent);
}

.project-card--link:hover h3 {
  color: var(--accent-soft);
}

.project-card--link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.project-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

.project-card p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.tag {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 0.5rem;
}

.timeline__track {
  position: absolute;
  left: 1.15rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--accent) 0%,
    rgba(157, 114, 255, 0.25) 100%
  );
  border-radius: 2px;
}

.timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem 1.25rem;
  margin-bottom: 2rem;
  align-items: start;
}

@media (max-width: 520px) {
  .timeline__item {
    grid-template-columns: 1fr;
    padding-left: 3rem;
  }

  .timeline__track {
    left: 0.65rem;
  }

  .timeline__node {
    position: absolute;
    left: 0;
    top: 0;
  }
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__node {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: var(--accent);
  color: #0a0a0a;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 0 20px var(--accent-dim);
  z-index: 1;
}

.timeline__node span {
  line-height: 1;
}

.timeline__card {
  background: var(--card);
  border: 1px solid var(--border-purple);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  margin: 0;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.timeline__card:hover {
  border-color: rgba(157, 114, 255, 0.7);
  box-shadow: 0 0 22px var(--accent-dim);
}

.timeline__card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.0625rem;
  font-weight: 600;
}

.timeline__meta {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
}

.timeline__desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Footer */
.site-footer {
  padding: 3rem 0 2.5rem;
  border-top: 1px solid var(--border-purple);
  background: var(--bg);
}

.footer-label {
  margin: 0 0 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  text-align: center;
}

.social-row {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-purple);
  background: var(--card);
  color: var(--text);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.social-link:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--accent-dim);
  color: var(--accent-soft);
}

.social-link img {
  display: block;
  border-radius: 8px;
  filter: grayscale(0.2) brightness(1.05);
}

.copyright {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

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

@media (max-width: 640px) {
  .header-inner {
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    margin-top: 0.5rem;
    justify-content: center;
    gap: 0.5rem 1.25rem;
  }

  .btn-resume {
    margin-left: auto;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .skill-card:hover,
  .project-card:hover,
  .social-link:hover {
    transform: none;
  }
}