/* ============================================================
   LAYOUT.CSS
   Sticky nav · Hero · Stats bar · Section spacing · Grids
   ============================================================ */


/* ============================================================
   CONTAINER
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2rem);
}


/* ============================================================
   NAV
   ============================================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  /* background transitions from transparent → --bg-secondary via JS .nav--scrolled */
  background-color: transparent;
  transition: background-color var(--transition-base),
              border-bottom-color var(--transition-base);
  border-bottom: 1px solid transparent;
}

#site-header.nav--scrolled {
  background-color: var(--bg-secondary);
  border-bottom-color: var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 64px;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2rem);
}

/* Wordmark */
.nav__wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav__dot {
  color: var(--accent);
}

/* Desktop links */
.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0.75rem;
  right: 0.75rem;
  height: 1px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.nav__link:hover::after,
.nav__link.is-active::after {
  transform: scaleX(1);
}

/* Social icons */
.nav__socials {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: 1rem;
}

.nav__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav__social-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: background-color var(--transition-fast);
}

.nav__hamburger:hover {
  background-color: var(--bg-tertiary);
}

.nav__hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hamburger → X when open */
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(2) {
  opacity: 0;
}
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile-menu {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 1rem clamp(1.25rem, 5vw, 2rem);
}

.nav__mobile-menu[hidden] {
  display: none;
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav__mobile-link {
  display: block;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav__mobile-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}


/* ============================================================
   SECTION BASE
   ============================================================ */
.section {
  padding-block: var(--section-padding);
}

.section__header {
  margin-bottom: 3rem;
}

.section__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  color: var(--text-primary);
  line-height: 1.1;
}

.section__subtitle {
  margin-top: 0.5rem;
  font-size: var(--text-lg);
  color: var(--text-secondary);
  font-weight: 300;
}


/* ============================================================
   HERO
   ============================================================ */
.section--hero {
  padding-top: clamp(5rem, 12vw, 10rem);
  padding-bottom: 0;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(2.5rem, 5vw, 5rem);
}

/* Badge */
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 0.35rem 0.9rem;
  margin-bottom: 1.5rem;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  flex-shrink: 0;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* Name */
.hero__name {
  font-size: var(--text-hero);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero__name-line {
  display: block;
}

/* Bio */
.hero__bio {
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 44ch;
  margin-bottom: 2rem;
}

/* CTAs */
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Terminal wrapper */
.hero__terminal {
  display: flex;
  justify-content: center;
  align-items: center;
}


/* ============================================================
   STATS BAR
   ============================================================ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: clamp(3rem, 6vw, 5rem);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--bg-secondary);
}

.stats-bar__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 3vw, 2rem) 1rem;
  text-align: center;
  border-right: 1px solid var(--border);
}

.stats-bar__item:last-child {
  border-right: none;
}

.stats-bar__number {
  font-family: var(--font-display);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stats-bar__label {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 400;
}


/* ============================================================
   EXPERIENCE LAYOUT
   ============================================================ */
.experience__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.experience-card {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 0 1.5rem;
}

.experience-card__icon-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.experience-card__connector {
  flex: 1;
  width: 1px;
  background-color: var(--border);
  margin-block: 0.5rem;
  min-height: 2rem;
}


/* ============================================================
   PROJECTS GRID
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
}


/* ============================================================
   SKILLS GRID
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}


/* ============================================================
   BUSINESS SECTION
   ============================================================ */
.business__inner {
  max-width: 640px;
}

.business__bio {
  font-size: var(--text-lg);
  font-weight: 300;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.business__stats {
  display: flex;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.business__stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.business__stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.business__stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.business__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}


/* ============================================================
   CONTACT LAYOUT
   ============================================================ */
.contact-card {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
}

.contact-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2rem;
}


/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer__links {
  display: flex;
  gap: 1.5rem;
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--text-primary);
}


/* ============================================================
   RESPONSIVE — md  (≤ 768px — tablet and below)
   ============================================================ */
@media (max-width: 768px) {
  /* Nav: hide desktop links & socials, show hamburger */
  .nav__links,
  .nav__socials {
    display: none;
  }

  .nav__hamburger {
    display: flex;
    margin-left: auto;
  }

  /* Reduce section spacing on tablet */
  .section {
    padding-block: clamp(3.5rem, 8vw, 5rem);
  }

  .section--hero {
    padding-top: clamp(3rem, 8vw, 5rem);
  }

  /* Hero: stack vertically, terminal above text */
  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__terminal {
    order: -1;
  }

  /* Slightly looser tracking in single-column layout */
  .hero__name {
    letter-spacing: -0.02em;
  }

  /* Stats: 2×2 grid */
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-bar__item:nth-child(2) {
    border-right: none;
  }

  .stats-bar__item:nth-child(1),
  .stats-bar__item:nth-child(2) {
    border-bottom: 1px solid var(--border);
  }

  /* Projects: 2 columns */
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Skills: 1 column */
  .skills-grid {
    grid-template-columns: 1fr;
  }

  /* Business stats: wrap */
  .business__stats {
    gap: 2rem;
    flex-wrap: wrap;
  }

  /* Business inner: full width */
  .business__inner {
    max-width: none;
  }

  /* Footer: centre */
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__links {
    justify-content: center;
  }
}


/* ============================================================
   RESPONSIVE — sm  (≤ 640px — mobile)
   ============================================================ */
@media (max-width: 640px) {
  /* Reduce section spacing */
  .section {
    padding-block: clamp(2.5rem, 8vw, 3.5rem);
  }

  .section--hero {
    padding-top: 2.5rem;
  }

  /* Hero bio: full width */
  .hero__bio {
    max-width: none;
  }

  /* Hero terminal: hide on small phones */
  .hero__terminal {
    display: none;
  }

  /* Projects: 1 column */
  .projects-grid {
    grid-template-columns: 1fr;
  }

  /* Experience: collapse icon column, keep content */
  .experience-card {
    grid-template-columns: 1fr;
  }

  .experience-card__icon-col {
    display: none;
  }

  /* Tighten up card spacing without icon */
  .experience-card__content {
    margin-bottom: 1rem;
  }

  /* Contact actions: stack full width */
  .contact-card__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-card__actions .btn {
    justify-content: center;
  }
}


/* ============================================================
   RESPONSIVE — xs  (≤ 480px — small phones)
   ============================================================ */
@media (max-width: 480px) {
  /* Tighten hero name for very small screens */
  .hero__name {
    font-size: clamp(2.5rem, 13vw, 3.5rem);
    letter-spacing: -0.015em;
  }

  /* Reduce hero badge size */
  .hero__badge {
    font-size: var(--text-xs);
    padding: 0.3rem 0.75rem;
  }

  /* Reduce section padding further */
  .section {
    padding-block: 2.5rem;
  }

  .section--hero {
    padding-top: 2rem;
  }

  /* Stats: tighten padding on very small screens */
  .stats-bar__item {
    padding: 1.25rem 0.5rem;
  }

  /* Stats number: slightly smaller */
  .stats-bar__number {
    font-size: var(--text-2xl);
  }

  /* Hero CTAs: stack on very small phones */
  .hero__ctas {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Section header: tighter bottom margin */
  .section__header {
    margin-bottom: 2rem;
  }
}


/* ============================================================
   RESPONSIVE — xl  (≥ 1280px)
   ============================================================ */
@media (min-width: 1280px) {
  .projects-grid {
    gap: 1.25rem;
  }
}