/* ══════════════════════════════════════
   INNER PAGES — pages.css
   Shared styles for all topic pages
   ══════════════════════════════════════ */
:root {
  --neon: #00e5ff; --neon-dim: #0097a7; --mint: #00ffab;
  --rose: #ff2d75; --violet: #c385ff; --amber: #f0c040;
  --bg0: #060810; --bg2: #10141e; --bg3: #161b28;
  --tx1: #e4e8f1; --tx2: #8892a4; --tx3: #4a5268;
  --brd: rgba(0,229,255,.07); --brd2: rgba(0,229,255,.18);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Sora',sans-serif;background:var(--bg0);color:var(--tx1);line-height:1.7;overflow-x:hidden}
body::after{content:'';position:fixed;inset:0;background:repeating-linear-gradient(0deg,transparent,transparent 2px,rgba(0,229,255,.006) 2px,rgba(0,229,255,.006) 4px);pointer-events:none;z-index:9999}
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:var(--bg0)}
::-webkit-scrollbar-thumb{background:var(--neon-dim);border-radius:3px}
a{color:var(--neon);text-decoration:none;transition:.3s}
a:hover{color:var(--mint)}

/* ── TOP BAR ── */
.topbar{
  position:sticky;top:0;z-index:100;padding:.8rem 2rem;
  background:rgba(6,8,16,.88);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--brd);
  display:flex;align-items:center;justify-content:space-between;
}
.topbar-back{
  font-family:'IBM Plex Mono',monospace;font-size:.74rem;
  color:var(--tx2);display:flex;align-items:center;gap:.4rem;transition:.3s;
}
.topbar-back:hover{color:var(--neon)}
.topbar-title{
  font-family:'IBM Plex Mono',monospace;font-size:.68rem;
  color:var(--tx3);letter-spacing:.05em;text-transform:uppercase;
}

/* ── PAGE HERO ── */
.page-hero{
  padding:4rem 2rem 3rem;max-width:900px;margin:0 auto;
  border-bottom:1px solid var(--brd);
}
.page-tag{
  font-family:'IBM Plex Mono',monospace;font-size:.62rem;
  padding:.25rem .65rem;border-radius:5px;display:inline-block;
  background:rgba(0,229,255,.06);border:1px solid rgba(0,229,255,.15);
  color:var(--neon);letter-spacing:.06em;text-transform:uppercase;margin-bottom:1rem;
}
.page-tag.tag-amber{background:rgba(240,192,64,.06);border-color:rgba(240,192,64,.15);color:var(--amber)}
.page-tag.tag-violet{background:rgba(195,133,255,.06);border-color:rgba(195,133,255,.15);color:var(--violet)}
.page-tag.tag-rose{background:rgba(255,45,117,.06);border-color:rgba(255,45,117,.15);color:var(--rose)}
.page-tag.tag-mint{background:rgba(0,255,171,.06);border-color:rgba(0,255,171,.15);color:var(--mint)}
.page-emoji{font-size:2.4rem;margin-bottom:.6rem;display:block}
.page-title{font-size:clamp(1.6rem,4vw,2.2rem);font-weight:700;line-height:1.15;margin-bottom:.4rem}
.page-subtitle{font-size:.92rem;color:var(--tx2);font-weight:300;max-width:640px}

/* ── CONTENT ── */
.page-content{max-width:900px;margin:0 auto;padding:2.5rem 2rem 4rem}
.page-content h2{
  font-size:1.25rem;font-weight:700;margin:2.5rem 0 .8rem;
  padding-bottom:.4rem;border-bottom:1px solid var(--brd);
  color:var(--neon);
}
.page-content h2:first-child{margin-top:0}
.page-content h3{font-size:1rem;font-weight:600;margin:1.5rem 0 .5rem;color:var(--tx1)}
.page-content p{font-size:.9rem;color:var(--tx2);font-weight:300;margin-bottom:.8rem}
.page-content strong{color:var(--tx1);font-weight:500}

/* Lists */
.page-content ul,.page-content ol{margin:0 0 1rem 0;padding:0}
.page-content ul li,.page-content ol li{
  font-size:.86rem;color:var(--tx2);padding:.3rem 0 .3rem 1.4rem;
  position:relative;line-height:1.65;
}
.page-content ul li::before{content:'▸';position:absolute;left:0;color:var(--neon);font-size:.7rem;top:.45rem}
.page-content ol{counter-reset:ol-counter;list-style:none}
.page-content ol li{counter-increment:ol-counter}
.page-content ol li::before{content:counter(ol-counter) '.';position:absolute;left:0;color:var(--neon);font-weight:600;font-size:.78rem}

/* Info boxes */
.info-box{
  background:rgba(0,229,255,.03);border:1px solid rgba(0,229,255,.1);
  border-radius:12px;padding:1.2rem 1.4rem;margin:1.2rem 0;
  display:flex;gap:.8rem;align-items:flex-start;
}
.info-box.warn{background:rgba(240,192,64,.04);border-color:rgba(240,192,64,.12)}
.info-box.danger{background:rgba(255,45,117,.04);border-color:rgba(255,45,117,.12)}
.info-box-ico{font-size:1.1rem;flex-shrink:0;margin-top:.1rem}
.info-box p{margin:0;font-size:.84rem;line-height:1.6}

/* Reference links */
.ref-card{
  background:var(--bg2);border:1px solid var(--brd);border-radius:12px;
  padding:1rem 1.3rem;margin:.6rem 0;display:flex;align-items:center;
  gap:.8rem;transition:.35s;
}
.ref-card:hover{border-color:var(--brd2);background:var(--bg3);transform:translateX(4px)}
.ref-ico{font-size:1.1rem;flex-shrink:0}
.ref-text{font-size:.82rem;color:var(--tx2)}
.ref-text strong{display:block;color:var(--tx1);font-size:.88rem;margin-bottom:.1rem}

/* Cards grid */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;margin:1.2rem 0}
.topic-card{
  background:var(--bg2);border:1px solid var(--brd);border-radius:13px;
  padding:1.4rem;transition:.35s;
}
.topic-card:hover{border-color:var(--brd2);background:var(--bg3)}
.topic-card h4{font-size:.92rem;font-weight:600;margin-bottom:.3rem}
.topic-card p{font-size:.78rem;color:var(--tx2);font-weight:300;margin:0;line-height:1.5}

/* Table */
.page-table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.82rem}
.page-table th{
  text-align:left;padding:.7rem .8rem;background:rgba(0,229,255,.05);
  border:1px solid var(--brd);color:var(--neon);font-family:'IBM Plex Mono',monospace;
  font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;
}
.page-table td{padding:.6rem .8rem;border:1px solid var(--brd);color:var(--tx2)}
.page-table tr:hover td{background:rgba(0,229,255,.015)}

/* Progress tracker */
.progress-section{margin:1.5rem 0}
.progress-item{
  background:var(--bg2);border:1px solid var(--brd);border-radius:10px;
  padding:1rem 1.2rem;margin:.5rem 0;display:flex;align-items:center;gap:1rem;
  transition:.3s;
}
.progress-item:hover{border-color:var(--brd2)}
.progress-check{
  width:22px;height:22px;border-radius:6px;border:2px solid var(--tx3);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  cursor:pointer;transition:.3s;font-size:.7rem;color:transparent;
}
.progress-check.done{border-color:var(--mint);background:rgba(0,255,171,.1);color:var(--mint)}
.progress-info{flex:1}
.progress-name{font-size:.88rem;font-weight:500}
.progress-desc{font-size:.74rem;color:var(--tx3)}
.progress-link{
  font-family:'IBM Plex Mono',monospace;font-size:.7rem;color:var(--neon);
  padding:.3rem .6rem;border:1px solid rgba(0,229,255,.15);border-radius:6px;
  transition:.3s;flex-shrink:0;
}
.progress-link:hover{background:rgba(0,229,255,.06);border-color:var(--brd2)}

/* Code block */
.code-block{
  background:var(--bg2);border:1px solid var(--brd);border-radius:10px;
  padding:1rem 1.3rem;margin:.8rem 0;font-family:'IBM Plex Mono',monospace;
  font-size:.76rem;color:var(--mint);overflow-x:auto;line-height:1.7;
}

/* Footer */
.page-footer{
  text-align:center;padding:2rem;border-top:1px solid var(--brd);
  font-family:'IBM Plex Mono',monospace;font-size:.68rem;color:var(--tx3);
  max-width:900px;margin:0 auto;
}

@media(max-width:700px){
  .page-hero,.page-content{padding-left:1.2rem;padding-right:1.2rem}
  .topbar{padding:.8rem 1.2rem}
  .cards-grid{grid-template-columns:1fr}
}