body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-12);
  scroll-margin-top: var(--nav-height);
}

#top {
  scroll-margin-top: var(--nav-height);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.section__title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}

.section__rule {
  width: 40px;
  height: 4px;
  background-color: var(--text);
  margin: 0 auto;
  border-radius: var(--radius-pill);
}

.surface {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 3rem);
  box-shadow: var(--shadow-md);
}

a {
  color: var(--accent);
  transition: color var(--transition);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================================================
   NAV
   ========================================================================== */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding-block: var(--space-4);
  background-color: transparent;
  transition: background-color var(--transition), padding var(--transition),
    box-shadow var(--transition);
}

.nav--scrolled {
  background-color: var(--bg-overlay);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding-block: var(--space-3);
  box-shadow: 0 1px 0 var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nav__brand {
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text);
  padding-block: var(--space-2);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background-color: var(--accent);
  transition: width var(--transition);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--accent);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text);
}

.nav__toggle-bar {
  display: block;
  width: 1.5rem;
  height: 2px;
  background-color: currentColor;
  position: relative;
  transition: background-color var(--transition);
}

.nav__toggle-bar::before,
.nav__toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  transition: transform var(--transition), top var(--transition);
}

.nav__toggle-bar::before {
  top: -7px;
}

.nav__toggle-bar::after {
  top: 7px;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar {
  background-color: transparent;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

@media (max-width: 768px) {
  .nav__toggle {
    display: inline-flex;
  }

  .nav__list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4);
    background-color: var(--bg-overlay-strong);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--border);
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition),
      visibility var(--transition);
  }

  .nav__list.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    padding-block: var(--space-3);
    text-align: center;
  }
}

/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  position: relative;
  padding: var(--space-10) var(--space-4);
  background: radial-gradient(ellipse at top, var(--accent-glow), transparent 60%),
    radial-gradient(
      ellipse at bottom right,
      var(--success-glow),
      transparent 55%
    ),
    var(--bg);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 1px 1px,
    rgba(255, 255, 255, 0.06) 1px,
    transparent 0
  );
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse at center, black, transparent 70%);
  -webkit-mask-image: radial-gradient(
    ellipse at center,
    black,
    transparent 70%
  );
  pointer-events: none;
}

.hero__content {
  position: relative;
  text-align: center;
  max-width: 56rem;
}

.hero__greeting {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-5);
  border: 1px solid var(--accent-soft);
}

.hero__title {
  font-size: var(--fs-3xl);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}

.hero__subtitle {
  font-size: var(--fs-lg);
  font-weight: 400;
  color: var(--text-muted);
  min-height: 2em;
}

.hero__cursor {
  display: inline-block;
  width: 3px;
  height: 1.1em;
  margin-left: 2px;
  vertical-align: text-bottom;
  background-color: var(--accent);
  animation: blink 1s steps(2) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

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

/* ==========================================================================
   ABOUT
   ========================================================================== */

.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 900px) {
  .about__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.about__profile {
  display: grid;
  grid-template-columns: minmax(120px, 200px) 1fr;
  gap: var(--space-5);
  align-items: start;
  margin-bottom: var(--space-6);
}

.about__avatar {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  aspect-ratio: 1;
  object-fit: cover;
}

.about__info {
  display: grid;
  gap: var(--space-3);
  font-size: var(--fs-sm);
}

.about__info-row dt {
  font-weight: 600;
  color: var(--text-muted);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.about__info-row dd {
  margin: 0;
  color: var(--text);
}

.skills {
  display: grid;
  gap: var(--space-4);
}

.skill__label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: var(--fs-sm);
  margin-bottom: var(--space-2);
}

.skill__level {
  color: var(--text-muted);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill__bar {
  height: 6px;
  background-color: var(--surface-2);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.skill__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success), var(--accent));
  border-radius: inherit;
  width: var(--level, 0%);
  transition: width 1s ease;
}

.about__heading {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-5);
  position: relative;
  padding-bottom: var(--space-3);
}

.about__heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 3px;
  background-color: var(--text);
  border-radius: var(--radius-pill);
}

.about__section {
  margin-bottom: var(--space-5);
}

.about__section-title {
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--space-4);
}

.about__list {
  display: grid;
  gap: var(--space-2);
}

.about__list li {
  padding-left: var(--space-4);
  position: relative;
  color: var(--text-muted);
}

.about__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--tag-color, var(--accent));
}

/* ==========================================================================
   PROJECTS
   ========================================================================== */

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

.project {
  display: flex;
  flex-direction: column;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.project:hover,
.project:focus-within {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}

.project__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background-color: var(--accent-soft);
  color: var(--accent);
  margin-bottom: var(--space-4);
  transition: background-color var(--transition), color var(--transition);
}

.project:hover .project__icon {
  background-color: var(--accent);
  color: var(--bg);
}

.project__icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.project__title {
  font-size: var(--fs-md);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.project__title a {
  color: var(--text);
}

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

.project__meta {
  display: grid;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-top: auto;
}

.project__meta-row {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--space-2);
}

.project__meta-key {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
}

/* ==========================================================================
   CONTACT
   ========================================================================== */

.contact {
  background: linear-gradient(to bottom, var(--bg), var(--accent-wash));
}

.contact .section__header {
  margin-bottom: var(--space-8);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 720px) {
  .contact__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact__lead {
  color: var(--text-muted);
  margin-bottom: var(--space-5);
}

.contact__list {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.contact__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text);
}

.contact__item svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--accent);
  flex-shrink: 0;
}

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  transition: background-color var(--transition), color var(--transition),
    transform var(--transition), border-color var(--transition);
}

.social-link:hover {
  background-color: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.social-link svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  padding-block: var(--space-6);
  text-align: center;
  color: var(--text-faint);
  font-size: var(--fs-sm);
  border-top: 1px solid var(--border);
}

/* ==========================================================================
   BACK TO TOP
   ========================================================================== */

.back-to-top {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent);
  color: var(--bg);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition),
    transform var(--transition);
  z-index: 50;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 1.25rem;
  height: 1.25rem;
}