/* ============================================================
   NE Naught Project — Stylesheet
   Dark, artistic, music-themed design
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --bg-deep:    #06060e;
  --bg-dark:    #0c0c1a;
  --bg-card:    #111128;
  --bg-card-hv: #181835;
  --text:       #e0dcee;
  --text-dim:   #8884a8;
  --accent:     #a78bfa;   /* violet */
  --accent2:    #67e8f9;   /* cyan */
  --accent3:    #f472b6;   /* pink */
  --gold:       #fbbf24;
  --border:     rgba(167,139,250,0.15);
  --glow:       rgba(167,139,250,0.25);
  --radius:     12px;
  --radius-sm:  8px;
  --font-body:  'Noto Sans SC', system-ui, sans-serif;
  --font-display:'Orbitron', 'Noto Sans SC', sans-serif;
  --max-w:      1200px;
  --nav-h:      64px;
  --ease-out:   cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-spring:cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 24px); }
body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color 0.25s; }
a:hover { color: var(--accent2); }

/* ---------- Selection ---------- */
::selection { background: var(--accent); color: var(--bg-deep); }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  transition: background 0.35s, box-shadow 0.35s, backdrop-filter 0.35s;
}
.nav.scrolled {
  background: rgba(6,6,14,0.82);
  backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 1px 0 var(--border), 0 8px 32px rgba(0,0,0,0.5);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700; font-size: 1.1rem;
  color: var(--text); letter-spacing: 0.05em;
}
.nav-logo:hover { color: var(--accent); }
.nav-avatar { width: 38px; height: 38px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--accent); transition: box-shadow 0.3s; }
.nav-logo:hover .nav-avatar { box-shadow: 0 0 18px var(--glow); }
.nav-links { list-style: none; display: flex; gap: 4px; }
.nav-links a {
  display: block; padding: 8px 16px; border-radius: 20px;
  color: var(--text-dim); font-size: 0.92rem; font-weight: 500;
  transition: color 0.25s, background 0.25s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); background: rgba(167,139,250,0.12); }

/* Mobile toggle */
.nav-toggle { display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text);
  border-radius: 2px; transition: transform 0.3s, opacity 0.3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; min-height: 100vh; display: flex;
  align-items: center; justify-content: center;
  overflow: hidden; padding: 120px 24px 80px;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }

/* Equalizer bars */
.equalizer {
  position: absolute; bottom: 0; left: 0; right: 0;
  display: flex; justify-content: center; align-items: flex-end;
  gap: 3px; height: 45%; opacity: 0.12; padding: 0 10%;
}
.equalizer span {
  flex: 1; max-width: 32px; background: linear-gradient(to top, var(--accent), var(--accent2));
  border-radius: 3px 3px 0 0; height: var(--h);
  animation: eq var(--d) ease-in-out infinite alternate;
}
@keyframes eq {
  0%   { height: calc(var(--h) * 0.4); }
  100% { height: var(--h); }
}

/* Hero content */
.hero-content { position: relative; text-align: center; z-index: 2; }
.hero-logo {
  width: clamp(120px, 20vw, 180px); margin: 0 auto 28px;
  border-radius: 50%; box-shadow: 0 0 60px var(--glow), 0 0 120px rgba(103,232,249,0.1);
  animation: logoFloat 5s ease-in-out infinite;
}
@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}
.hero-title {
  font-family: var(--font-display); margin-bottom: 18px;
}
.hero-title-main {
  display: block; font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 900; letter-spacing: 0.06em;
  background: linear-gradient(135deg, var(--accent) 20%, var(--accent2) 60%, var(--accent3) 90%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-title-sub {
  display: block; font-size: clamp(1rem, 2.5vw, 1.5rem);
  font-weight: 500; letter-spacing: 0.5em; color: var(--text-dim);
  margin-top: 6px;
}
.hero-desc {
  font-size: 1.15rem; color: var(--text-dim); max-width: 500px;
  margin: 0 auto 48px; line-height: 1.8;
}
.highlight {
  color: var(--accent2); font-weight: 700;
}

/* Scroll arrow */
.hero-scroll {
  display: block; width: 40px; height: 40px; margin: 0 auto;
  border-radius: 50%; border: 1px solid var(--border);
  position: relative; animation: bounceDown 2s ease-in-out infinite;
}
.hero-scroll:hover { border-color: var(--accent); }
.scroll-arrow {
  position: absolute; top: 50%; left: 50%;
  width: 8px; height: 8px;
  border-right: 1.5px solid var(--text-dim);
  border-bottom: 1.5px solid var(--text-dim);
  transform: translate(-50%,-70%) rotate(45deg);
}
@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(10px); }
}

/* ============================================================
   SECTION SHARED
   ============================================================ */
.section-header { text-align: center; margin-bottom: 56px; }
.section-title {
  font-family: var(--font-display); font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700; letter-spacing: 0.08em; color: var(--text);
  margin-bottom: 16px;
}
.section-divider { display: flex; align-items: center; justify-content: center; gap: 14px; }
.divider-line { display: block; width: 48px; height: 1px; background: var(--border); }
.divider-diamond {
  display: block; width: 8px; height: 8px; background: var(--accent);
  transform: rotate(45deg); box-shadow: 0 0 12px var(--glow);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  padding: 100px 24px 120px;
  max-width: 860px; margin: 0 auto;
}
.about-content { display: flex; flex-direction: column; }
.about-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 40px;
  transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out), box-shadow 0.35s, border-color 0.35s;
}
.about-card.visible { opacity: 1; transform: translateY(0); }
.about-card:hover { border-color: var(--accent); box-shadow: 0 0 28px var(--glow); transform: translateY(-2px); }
.about-card.accent { background: linear-gradient(135deg, rgba(167,139,250,0.08), rgba(103,232,249,0.05));
  border-color: rgba(167,139,250,0.3); }
.about-card .about-text + .about-text { margin-top: 1.1em; }
.about-text { font-size: 1.08rem; line-height: 1.9; color: var(--text); }
.about-text strong { color: var(--accent); }

/* ============================================================
   NEWS
   ============================================================ */
.news {
  padding: 100px 24px 120px;
  background: var(--bg-dark);
}
.news-container {
  max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px;
}
.news-card {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.6s var(--ease-out) var(--delay),
              transform 0.6s var(--ease-out) var(--delay),
              box-shadow 0.35s, border-color 0.35s;
}
.news-card.visible { opacity: 1; transform: translateY(0); }
.news-card-inner {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; transition: border-color 0.35s, box-shadow 0.35s;
}
.news-card:hover .news-card-inner {
  border-color: var(--accent); box-shadow: 0 0 24px var(--glow);
}
.news-card-img {
  flex: 0 0 240px; overflow: hidden;
}
.news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.news-card:hover .news-card-img img { transform: scale(1.06); }
.news-card-body { flex: 1; padding: 24px 28px; display: flex; flex-direction: column; justify-content: center; }
.news-date {
  font-family: var(--font-display); font-size: 0.78rem;
  color: var(--accent2); letter-spacing: 0.06em; margin-bottom: 8px;
}
.news-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.news-title a { color: var(--text); }
.news-title a:hover { color: var(--accent2); }
.news-summary { font-size: 0.92rem; color: var(--text-dim); line-height: 1.7; }

/* ============================================================
   GALLERY — two-row infinite marquee
   ============================================================ */
.gallery {
  padding: 100px 0 120px;
  max-width: none; overflow: hidden;
}
.gallery .section-header {
  padding: 0 24px; max-width: var(--max-w); margin-left: auto; margin-right: auto;
}

.gallery-marquee {
  position: relative; overflow: hidden;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;  /* vertical = page scroll, horizontal = photo wall */
}
.gallery-marquee:active { cursor: grabbing; }
.gallery-marquee.scrolling { cursor: grabbing; }

/* Each row */
.gallery-row {
  display: flex; gap: 10px;
  width: max-content;
  will-change: transform;
  /* JS drives transform — no CSS animation */
}
.gallery-row + .gallery-row { margin-top: 10px; }

.gallery-item {
  flex: 0 0 auto;
  width: clamp(220px, 28vw, 360px);
  height: clamp(170px, 22vw, 270px);
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  cursor: pointer;
  background: var(--bg-card); border: 1px solid var(--border);
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.gallery-item:hover {
  border-color: var(--accent); box-shadow: 0 0 24px var(--glow);
  transform: scale(1.03); z-index: 2;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; }
.gallery-placeholder {
  width: 100%; height: 100%; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px;
  color: var(--text-dim); font-size: 0.88rem;
}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed; inset: 0; z-index: 9999; background: rgba(6,6,14,0.94);
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  opacity: 0; pointer-events: none; transition: opacity 0.35s;
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox-img { max-width: 92vw; max-height: 80vh; border-radius: var(--radius);
  box-shadow: 0 0 80px rgba(0,0,0,0.6); }
.lightbox-caption { margin-top: 16px; font-size: 1rem; color: var(--text-dim); }
.lightbox-close {
  position: absolute; top: 28px; right: 32px;
  background: none; border: none; font-size: 2.4rem; color: var(--text-dim);
  cursor: pointer; width: 48px; height: 48px; display: flex; align-items: center;
  justify-content: center; border-radius: 50%; transition: color 0.25s, background 0.25s;
}
.lightbox-close:hover { color: var(--text); background: rgba(255,255,255,0.06); }

/* ============================================================
   JOIN US
   ============================================================ */
.joinus {
  padding: 100px 24px 60px;
  max-width: var(--max-w); margin: 0 auto;
}
.joinus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.joinus-item {
  position: relative; border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 3/4; cursor: pointer;
  background: var(--bg-card); border: 1px solid var(--border);
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.6s var(--ease-out) var(--delay),
              transform 0.6s var(--ease-out) var(--delay),
              border-color 0.35s, box-shadow 0.35s;
}
.joinus-item.visible { opacity: 1; transform: translateY(0); }
.joinus-item:hover { border-color: var(--accent); box-shadow: 0 0 32px var(--glow); }
.joinus-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.joinus-item:hover img { transform: scale(1.05); }
.joinus-placeholder {
  width: 100%; height: 100%; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 14px;
  color: var(--text-dim); font-size: 0.9rem;
}
.joinus-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(6,6,14,0.85) 0%, transparent 50%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 20px; opacity: 0; transition: opacity 0.4s;
}
.joinus-item:hover .joinus-overlay { opacity: 1; }
.joinus-caption { font-size: 0.95rem; font-weight: 600; }

/* ============================================================
   FRIENDS
   ============================================================ */
.friends {
  padding: 100px 24px 120px;
  background: var(--bg-dark);
}
.friends-grid {
  max-width: 620px; margin: 0 auto 36px;
  display: flex; flex-direction: column; gap: 12px;
}
.friend-card {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out) var(--delay),
              transform 0.6s var(--ease-out) var(--delay),
              border-color 0.35s, box-shadow 0.35s;
}
.friend-card.visible { opacity: 1; transform: translateY(0); }
.friend-card:hover { border-color: var(--accent); box-shadow: 0 0 24px var(--glow); transform: translateX(4px); }
.friend-avatar {
  width: 48px; height: 48px; border-radius: 50%; overflow: hidden;
  flex-shrink: 0; border: 2px solid var(--border);
}
.friend-avatar img { width: 100%; height: 100%; object-fit: cover; }
.friend-avatar-placeholder {
  width: 100%; height: 100%; display: flex; align-items: center;
  justify-content: center; font-size: 1.2rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  color: var(--bg-deep);
}
.friend-info { flex: 1; min-width: 0; }
.friend-name { display: block; font-weight: 600; color: var(--text); }
.friend-desc { display: block; font-size: 0.82rem; color: var(--text-dim); margin-top: 2px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.friend-arrow { font-size: 1.2rem; color: var(--text-dim);
  transition: transform 0.35s, color 0.35s; }
.friend-card:hover .friend-arrow { transform: translateX(4px); color: var(--accent2); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 56px 24px; text-align: center;
  border-top: 1px solid var(--border);
}
.footer-inner { max-width: 400px; margin: 0 auto; }
.footer-logo { width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 16px;
  opacity: 0.7; }
.footer-copy { font-size: 0.82rem; color: var(--text-dim); margin-bottom: 4px; }
.footer-tagline { font-size: 0.78rem; color: var(--text-dim); opacity: 0.6; }

/* ============================================================
   POST DETAIL OVERLAY
   ============================================================ */
.post-overlay {
  position: fixed; inset: 0; z-index: 10000;
  display: flex; align-items: flex-start; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.35s;
  overflow-y: auto; padding: 40px 20px 80px;
}
.post-overlay.open { opacity: 1; pointer-events: auto; }
.post-overlay-backdrop {
  position: fixed; inset: 0; background: rgba(6,6,14,0.94);
  z-index: -1;
}
.post-detail {
  position: relative; width: 100%; max-width: 760px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 48px 40px;
  margin: 60px 0;
  animation: postSlideIn 0.45s var(--ease-out);
}
@keyframes postSlideIn {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}
.post-close {
  position: absolute; top: 16px; right: 20px;
  background: none; border: none; font-size: 2rem; color: var(--text-dim);
  cursor: pointer; width: 44px; height: 44px; display: flex; align-items: center;
  justify-content: center; border-radius: 50%; transition: color 0.25s, background 0.25s;
  z-index: 10;
}
.post-close:hover { color: var(--text); background: rgba(255,255,255,0.06); }

/* Post header */
.post-detail-header { margin-bottom: 36px; text-align: center; }
.post-detail-date {
  font-family: var(--font-display); font-size: 0.82rem;
  color: var(--accent2); letter-spacing: 0.06em;
}
.post-detail-title {
  font-family: var(--font-display); font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700; letter-spacing: 0.04em; color: var(--text);
  margin-top: 8px; line-height: 1.4;
}

/* Post body — rendered markdown */
.post-detail-body {
  font-size: 1.05rem; line-height: 1.95; color: var(--text);
}
.post-detail-body > * + * { margin-top: 1.2em; }

/* Markdown heading styles */
.post-h1 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700;
  color: var(--text); margin-top: 2em; margin-bottom: 0.6em; letter-spacing: 0.03em; }
.post-h2 { font-size: 1.2rem; font-weight: 700; color: var(--accent);
  margin-top: 1.8em; margin-bottom: 0.5em; }
.post-h3, .post-h4, .post-h5, .post-h6 {
  font-size: 1.05rem; font-weight: 600; color: var(--text); margin-top: 1.5em; margin-bottom: 0.4em;
}

/* Markdown paragraph */
.post-p { margin: 0 0 1em; }
.post-p:last-child { margin-bottom: 0; }

/* Markdown blockquote */
.post-quote {
  border-left: 3px solid var(--accent); padding: 12px 20px;
  margin: 1.5em 0; background: rgba(167,139,250,0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.post-quote p { color: var(--text-dim); font-style: italic; margin: 0; }

/* Markdown list */
.post-list { padding-left: 1.5em; margin: 0.8em 0; }
.post-list li { margin-bottom: 0.35em; }
.post-list li::marker { color: var(--accent); }

/* Markdown image */
.post-img { display: block; max-width: 100%; border-radius: var(--radius-sm);
  margin: 1.5em auto; }

/* Markdown horizontal rule */
.post-hr { border: none; height: 1px; background: var(--border); margin: 2em 0; }

/* Markdown inline code */
.post-code {
  background: rgba(167,139,250,0.15); color: var(--accent2);
  padding: 2px 7px; border-radius: 4px; font-size: 0.9em;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

/* Post footer */
.post-detail-footer { margin-top: 40px; padding-top: 28px;
  border-top: 1px solid var(--border); text-align: center; }
.post-back-btn {
  background: rgba(167,139,250,0.12); border: 1px solid var(--border);
  color: var(--text); padding: 10px 24px; border-radius: 24px;
  font-size: 0.95rem; font-family: var(--font-body); cursor: pointer;
  transition: border-color 0.3s, background 0.3s, color 0.3s;
}
.post-back-btn:hover { border-color: var(--accent); background: rgba(167,139,250,0.2); color: var(--accent2); }

/* News card read-more */
.news-readmore {
  display: inline-block; margin-top: 10px; font-size: 0.85rem;
  color: var(--accent); font-weight: 500; opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.3s, transform 0.3s, color 0.3s;
}
.news-card:hover .news-readmore { opacity: 1; transform: translateX(0); }
.news-card { cursor: pointer; }

/* Spinner */
.spinner {
  width: 36px; height: 36px; margin: 40px auto;
  border: 3px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
  text-align: center; padding: 48px 24px; color: var(--text-dim);
  font-size: 1.05rem;
}
.file-warning {
  background: rgba(251,191,36,0.08); border: 1px solid rgba(251,191,36,0.25);
  border-radius: var(--radius); padding: 32px 24px; line-height: 1.8;
}
.file-warning code {
  background: rgba(251,191,36,0.15); color: var(--gold);
  padding: 2px 8px; border-radius: 4px; font-size: 0.88em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: rgba(6,6,14,0.95); backdrop-filter: blur(18px);
    flex-direction: column; padding: 12px 16px;
    gap: 2px; border-bottom: 1px solid var(--border);
    transform: translateY(-120%); transition: transform 0.4s var(--ease-out);
    box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 1rem; }

  .hero { min-height: 90vh; }
  .equalizer { height: 30%; gap: 2px; }

  .about { padding: 80px 20px 100px; }
  .about-card { padding: 22px 20px; }

  .news { padding: 80px 20px 100px; }
  .news-card-inner { flex-direction: column; }
  .news-card-img { flex: 0 0 180px; max-height: 180px; }
  .news-card-body { padding: 20px; }

  .gallery { padding: 80px 0 100px; }
  .gallery-item { width: 45vw; height: 34vw; }

  .friends { padding: 80px 20px 100px; }
  .friend-card { padding: 14px 16px; }

  .joinus { padding: 80px 20px 60px; }
  .joinus-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
}

@media (max-width: 480px) {
  .gallery-item { width: 55vw; height: 42vw; }
  .joinus-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .hero-logo { width: 100px; }
  .about-text { font-size: 0.95rem; }
  .about-card { padding: 24px 20px; }
}