*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background: #000000;
  color: #e8e4dc;
  font-family: 'Share Tech Mono', monospace;
  user-select: none;
}

html {
  scroll-behavior: smooth;
}

/* hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.hero-logo-wrap {
  position: relative;
  display: inline-flex;
  align-items: flex-end;
  margin-bottom: 2.8rem;
}

.hero-logo {
  position: relative;
  width: min(520px, 82vw);
  image-rendering: pixelated;
  opacity: 0;
  animation: fadein 1s 0.3s forwards;
  display: block;
}

.hero-cursor {
  position: absolute;
  right: -83px;
  bottom: 8px;
  width: 75px;
  height: 14px;
  background: #e8e4dc;
  opacity: 0;
  animation: fadein 0s 1.4s forwards, blink 1.1s 1.4s step-end infinite;
}

.hero-name {
  font-family: 'IM Fell English', serif;
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 400;
  color: #e8e4dc;
  letter-spacing: 0.06em;
  opacity: 0;
  animation: fadein 1s 0.6s forwards;
}

.hero-email {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1rem;
  text-decoration: none;
  color: #e8e4dc;
  font-family: 'Share Tech Mono', monospace;
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  opacity: 0;
  animation: fadein 0.8s 0.8s forwards;
  transition: opacity 0.2s;
}

.hero-email:hover { opacity: 0.7; }
.hero-email img { width: 22px; height: 22px; object-fit: contain; }

.socials {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  opacity: 0;
  animation: fadein 0.8s 0.9s forwards;
  margin-top: 1.6rem;
}

.socials a {
  display: flex;
  align-items: center;
  opacity: 1;
  transition: opacity 0.2s;
  text-decoration: none;
}

.socials a:hover { opacity: 0.6; }
.socials a img { width: 18px; height: 18px; object-fit: contain; }

.hero-apod-btn {
  background: none;
  border: 1px solid #282828;
  color: #aaa;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  margin-top: 2rem;
  opacity: 0;
  animation: fadein 0.8s 1.1s forwards;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-apod-btn img { width: 16px; height: 16px; object-fit: contain; }

.hero-apod-btn:hover {
  border-color: #e8e4dc;
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: #888;
  text-decoration: none;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  opacity: 0;
  animation: fadein 1s 1.6s forwards;
  transition: color 0.2s;
}

.hero-scroll:hover { color: #e8e4dc; }

/* sections */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 1.6rem;
  border-top: 1px solid #1a1a1a;
}

.section-header {
  margin-bottom: 2rem;
}

.section-header h2 {
  font-family: 'IM Fell English', serif;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 400;
  color: #fff;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.section-header p {
  font-size: 0.75rem;
  color: #aaa;
  letter-spacing: 0.1em;
  line-height: 1.7;
}

.tabs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.4rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: none;
  border: 1px solid #282828;
  color: #aaa;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.tab-btn:hover { border-color: #666; color: #e8e4dc; }
.tab-btn.active { border-color: #e8e4dc; color: #fff; }

/* gallery */
.gallery {
  columns: 3;
  column-gap: 5px;
  visibility: hidden;
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: 5px;
  cursor: pointer;
  overflow: hidden;
  display: block;
}

.gallery-item.hidden { display: none; }
.gallery-item.pending { opacity: 0; visibility: hidden; }

@keyframes popin {
  0% { opacity: 0; transform: scale(0.92); }
  60% { opacity: 1; transform: scale(1.02); }
  100% { opacity: 1; transform: scale(1); }
}

.gallery-item.popin { animation: popin 0.35s ease both; }
.gallery-item img { width: 100%; display: block; transition: opacity 0.3s; }
.gallery-item:hover img { opacity: 0.7; }

/* apod */
.apod-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  font-size: 0.75rem;
  color: #aaa;
  letter-spacing: 0.12em;
}

.apod-image-wrap {
  width: 100%;
  margin-bottom: 1.2rem;
  max-width: 800px;
}

.apod-image-wrap img { width: 100%; display: block; cursor: pointer; transition: opacity 0.3s; }
.apod-image-wrap img:hover { opacity: 0.8; }
.apod-image-wrap iframe { width: 100%; aspect-ratio: 16/9; border: none; }

.apod-title {
  font-family: 'IM Fell English', serif;
  font-size: 1.4rem;
  font-weight: 400;
  color: #fff;
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
}

.apod-date {
  font-size: 0.7rem;
  color: #aaa;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.apod-desc {
  font-size: 0.82rem;
  color: #e8e4dc;
  line-height: 1.8;
  letter-spacing: 0.04em;
  max-width: 70ch;
}

.apod-credit {
  margin-top: 1.2rem;
  font-size: 0.6rem;
  color: #888;
  letter-spacing: 0.1em;
}

.apod-credit a { color: #aaa; text-decoration: none; transition: color 0.2s; }
.apod-credit a:hover { color: #fff; }

/* back to top */
.back-to-top {
  position: fixed;
  bottom: 1.4rem;
  right: 1.4rem;
  background: rgba(0, 0, 0, 0.82);
  border: 1px solid #222;
  color: #888;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, color 0.2s, border-color 0.2s;
  z-index: 500;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  color: #e8e4dc;
  border-color: #444;
}

/* apod modal */
.apod-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  z-index: 1500;
  align-items: flex-start;
  justify-content: center;
  padding: 3rem 1.5rem;
  overflow-y: auto;
}

.apod-modal.open { display: flex; }

.apod-modal-panel {
  position: relative;
  background: #000;
  border: 1px solid #222;
  max-width: 720px;
  width: 100%;
  padding: 2.2rem 2rem 2rem;
  margin: auto;
  user-select: text;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6);
}

.apod-modal-close {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 32px;
  height: 28px;
  background: none;
  border: none;
  color: #555;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.85rem;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.apod-modal-close:hover {
  color: #fff;
  background: #c42b1c;
}

/* lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.96);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  cursor: default;
  opacity: 0;
  transition: opacity 0.25s;
}

.lightbox img.loaded { opacity: 1; }

.lightbox-close {
  position: fixed;
  top: 1.4rem;
  right: 1.8rem;
  font-size: 0.58rem;
  color: #555;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: color 0.2s;
}

.lightbox-close:hover { color: #e8e4dc; }

.lightbox-prev, .lightbox-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.55rem;
  color: #444;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.2s;
  user-select: none;
  padding: 1rem;
}

.lightbox-prev { left: 1.2rem; }
.lightbox-next { right: 1.2rem; }
.lightbox-prev:hover, .lightbox-next:hover { color: #e8e4dc; }


.lightbox-caption {
  position: fixed;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.58rem;
  color: #e8e4dc;
  letter-spacing: 0.06em;
  text-align: center;
  max-width: 80vw;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #000; }
::-webkit-scrollbar-thumb { background: #222; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #333; }

@keyframes fadein {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

/* ── MOBILE ── */
@media (max-width: 768px) {
  .hero {
    padding: 1.5rem;
  }

  .hero-logo {
    width: min(320px, 70vw);
  }

  .hero-cursor {
    right: -50px;
    bottom: 5px;
    width: 45px;
    height: 10px;
  }

  .hero-name {
    font-size: clamp(1.6rem, 8vw, 2.4rem);
  }

  .hero-email {
    font-size: clamp(0.8rem, 3vw, 1rem);
  }

  .hero-email img {
    width: 16px;
    height: 16px;
  }

  .socials {
    gap: 0.8rem;
    margin-top: 1.2rem;
  }

  .socials a img {
    width: 16px;
    height: 16px;
  }

  .section {
    padding: 3rem 1rem;
  }

  .section-header {
    margin-bottom: 1.4rem;
  }

  .gallery {
    columns: 2;
    column-gap: 4px;
  }

  .apod-title {
    font-size: 1.2rem;
  }

  .apod-desc {
    font-size: 0.76rem;
  }

  .hero-apod-btn {
    margin-top: 1.5rem;
    font-size: 0.65rem;
    padding: 0.5rem 0.9rem;
  }

  .apod-modal {
    padding: 1.5rem 0.8rem;
  }

  .apod-modal-panel {
    padding: 1.6rem 1.2rem 1.2rem;
  }

  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    padding: 0.5rem 0.8rem;
  }
}