/* ===== "What I Build" page ===== */
html {
  scroll-behavior: smooth;
}

body.build-page {
  background: radial-gradient(120% 60% at 50% 0%, #F7EF7859 0%, #F7EF7800 60%), var(--color-build-bg);
  background-attachment: fixed;
}

/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 2.75rem;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin: 2.75rem auto 0;
  max-width: 1000px;
  width: calc(100% - 3rem);
  padding: 1rem 2rem;
  border-radius: 1.25rem;
  background: #F7EF78E6;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.navbar.is-scrolled {
  background: #F7EF7899;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  color: var(--text-strong);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-strong);
  border-bottom-color: var(--color-love-bg);
}

/* ===== Sections ===== */
.section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
  scroll-margin-top: 6rem;
}

.section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-strong);
  margin-bottom: 0.75rem;
}

.section p {
  color: var(--text-primary);
  max-width: 40ch;
}

/* ===== Hero ===== */
.hero {
  min-height: calc(100vh - 6rem);
}

.hero h1 {
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  color: var(--text-strong);
  max-width: 20ch;
  line-height: 1.3;
  margin-bottom: 2.5rem;
}

.build-categories {
  list-style: none;
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.build-categories li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.build-categories li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-love-bg);
}

/* ===== Work / Featured Work ===== */
.work-section {
  align-items: stretch;
  justify-content: flex-start;
  text-align: left;
  max-width: 1300px;
  margin: 0 auto;
}

.work-section > h2 {
  text-align: center;
}

.featured-work {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.subsection-label {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 3rem;
  text-align: center;
}

.carousel-frame {
  position: relative;
  background: #fff;
  border-radius: 2rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.1);
  padding: 3rem 3rem 4.75rem;
  overflow: hidden;
}

.carousel-viewport {
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease;
}

.project-card {
  flex: 0 0 100%;
  display: flex;
  align-items: center;
  gap: 5rem;
}

.carousel-controls {
  position: absolute;
  bottom: 1.75rem;
  left: 3rem;
  right: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: background 0.2s ease, width 0.2s ease;
}

.carousel-dot.is-active {
  width: 24px;
  background: var(--color-love-bg);
}

.carousel-arrows {
  display: flex;
  gap: 0.75rem;
}


.project-media {
  flex: 1.2;
  aspect-ratio: 16 / 9;
  border-radius: 1.5rem;
  background: #F7EF7866;
  border: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-media--portrait {
  flex: 0 0 auto;
  width: auto;
  height: min(60vh, 520px);
  aspect-ratio: 9 / 16;
}

.project-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-placeholder {
  color: var(--text-primary);
  font-size: 1rem;
  text-align: center;
  padding: 2rem;
}

.project-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  padding: 2rem;
  border-radius: 1.5rem;
  background: var(--color-love-bg);
}

.project-name {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  color: var(--text-strong);
}

.project-info .project-description {
  font-size: 1.1rem;
  color: var(--text-primary);
  line-height: 1.7;
  max-width: 100%;
}

.project-info .project-tech {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  opacity: 0.85;
  max-width: 100%;
}

.project-links {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.project-link {
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.8rem 1.75rem;
  border-radius: 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-link--primary {
  background: var(--text-strong);
  color: #fff;
}

.project-link--secondary {
  background: transparent;
  color: var(--text-strong);
  border: 1px solid rgba(0, 0, 0, 0.2);
}

.project-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.project-nav {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: #F7EF7840;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--text-strong);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.project-nav:hover {
  background: var(--color-love-bg);
  transform: scale(1.05);
}

/* ===== Toolkit ===== */
.toolkit-section {
  align-items: stretch;
  text-align: left;
  max-width: 1000px;
  margin: 0 auto;
  gap: 0;
}

.toolkit-section > h2 {
  text-align: center;
}

/* ===== Toolkit train ===== */
.train-toolkit {
  margin-top: 2.5rem;
}

.train-map {
  position: relative;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  aspect-ratio: 300 / 1440;
}

.train-path-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.train-path-svg path {
  fill: none;
  stroke: rgba(0, 0, 0, 0.15);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 2 14;
}

.train-station {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
  z-index: 2;
}

.train-station-dot {
  display: block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--text-strong);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.3s ease;
}

.train-station.is-active .train-station-dot {
  background: var(--color-love-bg);
  border-color: var(--color-love-bg);
  transform: scale(1.2);
}

.train-station.is-just-revealed .train-station-dot {
  animation: stationPulse 0.6s ease;
}

@keyframes stationPulse {
  0% { box-shadow: 0 0 0 0 rgba(247, 239, 120, 0.7); }
  100% { box-shadow: 0 0 0 14px rgba(247, 239, 120, 0); }
}

.train-station-chips {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  filter: grayscale(1);
  opacity: 0.3;
  transform: scale(0.92);
  transition: filter 0.5s ease, opacity 0.5s ease, transform 0.5s ease;
}

.train-station.is-reached .train-station-chips {
  filter: grayscale(0);
  opacity: 1;
  transform: scale(1);
}

.train-engine {
  position: absolute;
  left: 0%;
  top: 0%;
  transform: translate(-50%, -55%);
  z-index: 4;
}

.train-engine img {
  display: block;
  width: 64px;
  height: 88px;
  object-fit: contain;
  filter: drop-shadow(0 6px 10px rgba(0, 0, 0, 0.25));
}

.tech-chip {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem 0.35rem 0.35rem;
  border-radius: 0.6rem;
  background: var(--color-love-bg);
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--text-strong);
  white-space: nowrap;
}

.tech-chip svg {
  flex-shrink: 0;
  border-radius: 4px;
}

/* ===== Journey ===== */
.journey-section {
  align-items: stretch;
  text-align: left;
  max-width: 1000px;
  margin: 0 auto;
}

.journey-section > h2 {
  text-align: center;
}

.journey-list {
  display: flex;
  flex-direction: column;
  margin-top: 3rem;
}

.journey-item {
  display: flex;
  align-items: flex-start;
  gap: 4rem;
  padding: 2.25rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.journey-item:last-child {
  border-bottom: none;
}

.journey-image {
  flex-shrink: 0;
  width: 220px;
  height: 220px;
  border-radius: 1rem;
  background: #F7EF7866;
  border: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.journey-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.journey-content {
  flex: 1;
  padding-top: 0.5rem;
}

.journey-year {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-primary);
  opacity: 0.7;
  margin-bottom: 0.75rem;
}

.journey-title {
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  color: var(--text-strong);
  margin-bottom: 0.85rem;
}

.journey-content .journey-description {
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.65;
  max-width: 95%;
}

/* ===== Beyond ===== */
.beyond-text {
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  color: var(--text-primary);
  max-width: 40ch;
  margin-top: 1rem;
  margin-bottom: 2.5rem;
}

.beyond-link {
  display: inline-block;
  padding: 1rem 2.25rem;
  border-radius: 2rem;
  background: var(--color-love-bg);
  color: var(--text-strong);
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.beyond-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* ===== Contact ===== */
.contact-label {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.contact-hero-link {
  display: inline-block;
  font-size: clamp(1.75rem, 6vw, 3.5rem);
  font-weight: 700;
  color: var(--text-strong);
  text-decoration: none;
  word-break: break-word;
  border-bottom: 3px solid transparent;
  transition: border-color 0.25s ease;
}

.contact-hero-link:hover {
  border-bottom-color: var(--color-love-bg);
}

.contact-secondary {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2.5rem;
}

.contact-secondary a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.contact-secondary a:hover {
  color: var(--text-strong);
  border-bottom-color: var(--color-love-bg);
}

/* ===== Playground ===== */
.playground {
  margin-top: 5rem;
}

.playground-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 130px);
  grid-template-areas:
    "a a b b"
    "a a b b"
    "c d e f"
    "c d g g";
  gap: 3px;
  background: #F7EF78;
  border: 1px solid #F7EF78;
  border-radius: 1.5rem;
  padding: 3px;
}

.playground-tile:nth-child(1) { grid-area: a; }
.playground-tile:nth-child(2) { grid-area: b; }
.playground-tile:nth-child(3) { grid-area: c; }
.playground-tile:nth-child(4) { grid-area: d; }
.playground-tile:nth-child(5) { grid-area: e; }
.playground-tile:nth-child(6) { grid-area: f; }
.playground-tile:nth-child(7) { grid-area: g; }

.playground-tile {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 0.6rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  overflow: hidden;
  z-index: 1;
  transform: scale(1);
  transform-origin: center center;
  transition: height 0.35s ease, transform 0.35s ease, box-shadow 0.35s ease,
    border-radius 0.35s ease, background 0.2s ease;
}

.playground-tile:hover {
  background: #F7EF7899;
}

.playground-tile.is-open {
  height: auto;
  min-height: 100%;
  transform: scale(1.15);
  z-index: 10;
  border-radius: 1rem;
  background: #F7EF78;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.playground-tile:focus-visible {
  outline: 2px solid var(--color-love-bg);
  outline-offset: 2px;
}

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

.tile-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-strong);
}

.tile-details {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}

.playground-tile.is-open .tile-details {
  grid-template-rows: 1fr;
}

.tile-details-inner {
  overflow: hidden;
}

.tile-details-inner p,
.tile-details-inner a {
  margin-top: 0.9rem;
}

.tile-details-inner .tile-description {
  color: var(--text-primary);
  line-height: 1.5;
  max-width: 100%;
}

.tile-tech {
  font-size: 0.85rem;
  color: var(--text-primary);
  opacity: 0.85;
}

.tile-link {
  display: inline-block;
  color: var(--text-strong);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}

.tile-link:hover {
  text-decoration: underline;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem 1.5rem;
    width: calc(100% - 2rem);
  }

  .nav-links {
    gap: 1.25rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .carousel-frame {
    padding: 2rem 1.5rem 4rem;
  }

  .train-map {
    max-width: 320px;
  }

  .train-station {
    gap: 2.25rem;
  }

  .tech-chip {
    font-size: 0.7rem;
    padding: 0.35rem 0.7rem 0.35rem 0.35rem;
  }

  .carousel-controls {
    left: 1.5rem;
    right: 1.5rem;
  }

  .project-card {
    flex-direction: column;
    gap: 2rem;
  }

  .project-info {
    text-align: center;
    align-items: center;
  }

  .project-links {
    justify-content: center;
  }

  .playground-grid {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(7, 90px);
    grid-template-areas:
      "a"
      "b"
      "c"
      "d"
      "e"
      "f"
      "g";
  }

  .journey-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
  }

  .journey-description {
    max-width: 100%;
  }
}