/* =======================================
   Astracel – About (Tabs + Slide + Underline)
   Updated for 3 tabs (Sky / Favorites / Astracel)
   ======================================= */

:root{
  --bg: #0e1013;
  --panel: rgba(255,255,255,0.06);
  --panel-hover: rgba(255,255,255,0.10);
  --panel-border: rgba(255,255,255,0.14);
  --text: #eef2f6;
  --muted: #a9b1ba;
  --accent: #1bdf91;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.03);
  --shadow-soft: 0 8px 24px rgba(0,0,0,0.28);
}

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

html { min-height: 100%; background: var(--bg); }
body {
  min-height: 100%;
  margin: 0;
  padding: 0 0 40px 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 800px at 10% -10%, color-mix(in srgb, var(--accent) 35%, transparent), transparent 60%),
    radial-gradient(1000px 700px at 100% 0%, rgba(86,98,246,0.06), transparent 60%),
    var(--bg);
  background-repeat: no-repeat;
  background-attachment: fixed, fixed, scroll;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--accent) transparent; }
*::-webkit-scrollbar { height: 8px; width: 8px; }
*::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 60%, transparent));
  border-radius: 20px;
}
*::-webkit-scrollbar-track { background: transparent; }

/* Cards */
.card{
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform .18s ease, background .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.card:hover{
  background: var(--panel-hover);
  border-color: color-mix(in srgb, var(--panel-border) 60%, #fff 40%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

/* Container */
.about-container{
  width: min(1280px, 94vw);
  margin: 16px auto 0;
}

/* ---------- Tabs (center under navbar) ---------- */
.about-tabs-wrap{
  display:flex;
  justify-content:center;
  margin: 18px auto 16px;
}

.about-tabs{
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px; /* room for underline */
}

.tab-sep{
  color: color-mix(in srgb, var(--muted) 80%, transparent);
  user-select: none;
  font-weight: 700;
  letter-spacing: .5px;
}

/* Buttons */
.tab-btn{
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  font-weight: 800;
  letter-spacing: .2px;
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color .18s ease, color .18s ease, transform .12s ease;
  font-size: 14px;
  line-height: 1;
}
.tab-btn:hover{
  color: var(--text);
  border-color: rgba(255,255,255,0.34);
  transform: translateY(-1px);
}
.tab-btn:focus{ outline: none; }
.tab-btn.is-active{ color: var(--text); }

/* Subtle underline */
.tab-underline{
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  border-radius: 999px;
  background: var(--accent);
  opacity: .9;
  transform: translateX(0);
  transition:
    transform 380ms cubic-bezier(.2,.9,.2,1),
    width 380ms cubic-bezier(.2,.9,.2,1);
}
.tab-underline.no-anim{ transition: none !important; }

/* Grid */
.about-grid{
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 16px;
  margin-top: 0;
}
@media (max-width: 960px){
  .about-grid{ grid-template-columns: 1fr; }
}

/* Portrait */
.portrait-card{
  display: grid;
  grid-template-rows: auto auto;
  align-content: start;
  padding: 12px;
}
.portrait-card img{
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: calc(var(--radius) - 6px);
  user-select: none;
}
.portrait-fallback{
  display: grid;
  place-items: center;
  border: 1px dashed rgba(255,255,255,0.18);
  border-radius: calc(var(--radius) - 6px);
  aspect-ratio: 3 / 4;
  color: var(--muted);
  padding: 18px;
  text-align: center;
}
.pf-icon{ font-size: 28px; }

/* Chips */
.links{
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.link-chip{
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  transition: background .18s ease, color .18s ease, transform .12s ease;
}
.link-chip:hover{
  background: rgba(255,255,255,0.10);
  color: var(--accent);
  transform: translateY(-1px);
}

/* ---------- Sliding content area ---------- */
.tabs-stage{
  padding: 0;
  overflow: hidden;
}

/* Hide slider until JS sets correct position (prevents flash) */
.tabs-stage[data-ready="0"] .tabs-viewport{
  visibility: hidden;
}

.tabs-viewport{
  overflow: hidden;
  border-radius: var(--radius);
}

/* 3 panels: track is 300%, each panel is 1/3 of track */
.tabs-track{
  display: flex;
  width: 300%;
  transform: translate3d(0,0,0);
  transition: transform 520ms cubic-bezier(.2,.9,.2,1);
  will-change: transform;
}
.tabs-track.no-anim{ transition: none !important; }

/* Each panel takes exactly 1/3 of a 300% track => one full viewport */
.tab-panel{
  flex: 0 0 calc(100% / 3);
  width: calc(100% / 3);
  padding: 16px 18px;
  overflow: hidden;
}

.tab-panel h2{
  margin: 0 0 8px 0;
  font-size: clamp(18px, 2.2vw, 24px);
}

/* Wrap fix */
.about-text,
.about-text p{
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.about-text p{
  margin: 0 0 10px 0;
  line-height: 1.55;
}
.about-text a{
  overflow-wrap: anywhere;
  word-break: break-word;
}

.credits-inline{
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.credits-inline h3{
  margin: 0 0 8px 0;
  font-size: 16px;
  letter-spacing: .2px;
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
}

.muted{ color: var(--muted); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  .tabs-track,
  .tab-underline{ transition: none !important; }
  .card, .tab-btn, .link-chip{ transition: none !important; }
}

/* Small screens */
@media (max-width: 520px){
  .tab-btn{ font-size: 13px; padding: 6px 9px; }
  .about-tabs{ gap: 8px; }
}