:root {
  --bg:       #07080f;
  --surface:  #0e1020;
  --border:   #1a1f3a;
  --cyan:     #00f5ff;
  --magenta:  #ff2d78;
  --purple:   #8b5cf6;
  --text:     #c8d0e8;
  --muted:    #4a5275;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', 'Hiragino Sans', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ── Header ── */
header {
  padding: 3rem 2rem 2rem;
  text-align: center;
  position: relative;
}
header::after {
  content: '';
  display: block;
  margin: 1.5rem auto 0;
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--magenta), transparent);
}

.title {
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 12px rgba(0,245,255,0.4));
}
.subtitle {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ── Date Nav ── */
.date-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.date-nav::-webkit-scrollbar { display: none; }
.date-nav-inner {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  min-width: max-content;
}
.date-nav-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.7rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  font-family: inherit;
}
.date-nav-btn:hover {
  color: var(--text);
  border-color: var(--cyan);
}
.date-nav-btn.is-active {
  color: var(--bg);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ── Date Section ── */
.date-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 2rem 0;
}
.date-section + .date-section {
  padding-top: 1rem;
}

.date-heading {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.date-heading-label {
  font-size: 0.72rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 700;
  white-space: nowrap;
  opacity: 0.9;
}
.date-heading-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}
.date-heading-count {
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  white-space: nowrap;
}

/* ── Grid ── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow:
    0 0 0 1px var(--cyan),
    0 8px 40px rgba(0,245,255,0.15),
    0 0 60px rgba(139,92,246,0.1);
}

.card::before,
.card::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  z-index: 2;
  pointer-events: none;
}
.card::before {
  top: -1px; left: -1px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
  border-radius: 12px 0 0 0;
}
.card::after {
  bottom: -1px; right: -1px;
  border-bottom: 2px solid var(--magenta);
  border-right: 2px solid var(--magenta);
  border-radius: 0 0 12px 0;
}

.card-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  background: #000;
}
.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease, filter 0.4s ease;
  filter: brightness(0.9) saturate(1.1);
  cursor: zoom-in;
}
.card:hover .card-img-wrap img {
  transform: scale(1.06);
  filter: brightness(1) saturate(1.2);
}
.card-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 60%,
    rgba(0,245,255,0.04) 80%,
    rgba(255,45,120,0.06) 100%
  );
  pointer-events: none;
}

.card-date-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 3;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: var(--bg);
  background: var(--cyan);
  border-radius: 4px;
  padding: 0.2rem 0.45rem;
  font-weight: 700;
  opacity: 0.85;
  pointer-events: none;
}

.card-new-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 3;
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  color: var(--bg);
  background: var(--magenta);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  font-weight: 700;
  text-transform: uppercase;
  pointer-events: none;
  box-shadow: 0 0 8px rgba(255,45,120,0.7);
  animation: new-glow 2.5s ease-in-out infinite;
}
@keyframes new-glow {
  0%, 100% { box-shadow: 0 0 6px rgba(255,45,120,0.55); }
     50%   { box-shadow: 0 0 14px rgba(255,45,120,0.95), 0 0 28px rgba(255,45,120,0.3); }
}

.card-body {
  padding: 1rem 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.card-filename {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  text-transform: uppercase;
  font-weight: 600;
  opacity: 0.85;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  word-break: break-all;
}
.card-link:hover {
  color: var(--text);
  border-color: var(--magenta);
  background: rgba(255,45,120,0.08);
}
.card-link svg {
  flex-shrink: 0;
  color: var(--magenta);
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 2.5rem 1rem 2rem;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
}

.footer-meta {
  margin-bottom: 1.6rem;
}

.footer-claude {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0;
  padding: 0.55rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}
.footer-claude:hover {
  border-color: var(--purple);
  background: rgba(139,92,246,0.07);
}
.footer-claude-logo {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.85;
}
.footer-claude-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  text-align: left;
}
.footer-claude-label {
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--purple);
  font-weight: 700;
  line-height: 1;
}
.footer-claude-tag {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  line-height: 1;
  text-transform: none;
}

.footer-invader {
  display: block;
  margin: 0 auto 1.4rem;
  width: 176px;
  height: auto;
  filter:
    drop-shadow(0 0 6px rgba(139,92,246,0.7))
    drop-shadow(0 0 18px rgba(139,92,246,0.3));
  image-rendering: pixelated;
}

/* ── Loading ── */
.loading {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .date-section { padding: 1.5rem 1rem 0; }
  .grid { gap: 1rem; }
  header { padding: 2rem 1rem 1.5rem; }
}

/* ── Lightbox ── */
.lb {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.lb.is-open {
  opacity: 1;
  pointer-events: auto;
}
.lb-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 8, 15, 0.92);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.lb-frame {
  position: relative;
  z-index: 1;
  max-width: min(90vw, 1100px);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  transform: scale(0.96);
  transition: transform 0.2s ease;
}
.lb.is-open .lb-frame {
  transform: scale(1);
}
.lb-frame::before, .lb-frame::after {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
  z-index: 2;
}
.lb-frame::before {
  top: -2px; left: -2px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
}
.lb-frame::after {
  bottom: -2px; right: -2px;
  border-bottom: 2px solid var(--magenta);
  border-right: 2px solid var(--magenta);
}
.lb-img {
  display: block;
  max-width: 100%;
  max-height: calc(90vh - 52px);
  object-fit: contain;
  border: 1px solid var(--border);
  filter: drop-shadow(0 0 24px rgba(0,245,255,0.08));
}
.lb-caption {
  width: 100%;
  padding: 0.55rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-shrink: 0;
}
.lb-caption-user {
  font-size: 0.74rem;
  color: var(--cyan);
  letter-spacing: 0.12em;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lb-caption-link {
  font-size: 0.68rem;
  color: var(--muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.22rem 0.55rem;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}
.lb-caption-link:hover {
  color: var(--text);
  border-color: var(--magenta);
  background: rgba(255,45,120,0.07);
}
.lb-close {
  position: absolute;
  top: -14px;
  right: -14px;
  width: 32px;
  height: 32px;
  background: var(--bg);
  border: 1px solid var(--magenta);
  border-radius: 50%;
  color: var(--magenta);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  box-shadow: 0 0 10px rgba(255,45,120,0.45);
  transition: background 0.15s, box-shadow 0.15s;
  padding: 0;
}
.lb-close:hover {
  background: rgba(255,45,120,0.14);
  box-shadow: 0 0 20px rgba(255,45,120,0.85);
}