/* Brian+ Insights — Index Design System */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0a0a0f;--bg-alt:#0e0e16;--surface:#13131d;--card:#111119;
  --cyan:#00d4ff;--cyan-dim:rgba(0,212,255,.12);--cyan-glow:rgba(0,212,255,.25);
  --purple:#7c3aed;--purple-dim:rgba(124,58,237,.08);
  --text:#f0f0f5;--text-secondary:#a0a0b8;--text-dim:#7e7e9a;
  --border:#1a1a28;--radius:14px;--radius-sm:8px;
  --ease:cubic-bezier(.4,0,.2,1);--ease-out:cubic-bezier(.16,1,.3,1);
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);
  background-size:60px 60px;opacity:.06}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.page{max-width:900px;margin:0 auto;padding:3rem 1.5rem 5rem;position:relative;z-index:1}
nav{padding:1.5rem 0 3rem;display:flex;align-items:center;justify-content:space-between}
.logo{font-family:'Bebas Neue',sans-serif;font-size:1.4rem;letter-spacing:.06em;color:var(--text)}
.logo span{color:var(--cyan)}
.back{font-size:.82rem;color:var(--text-dim);transition:color .2s}.back:hover{color:var(--cyan)}

/* === HEADER === */
.index-header{margin-bottom:2.5rem}
h1{font-family:'Bebas Neue',sans-serif;font-size:clamp(2.5rem,6vw,3.5rem);line-height:1;margin-bottom:.5rem;
  background:linear-gradient(135deg,var(--text),var(--text-secondary));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.desc{color:var(--text-secondary);font-size:.95rem;max-width:520px;margin-bottom:1.5rem}
.article-count{font-family:'JetBrains Mono',monospace;font-size:.72rem;color:var(--cyan);
  background:var(--cyan-dim);padding:.2rem .6rem;border-radius:100px;display:inline-block}

/* === SEARCH === */
.search-wrap{margin-bottom:2rem}
.search-input{width:100%;padding:.75rem 1.25rem .75rem 2.75rem;
  background:var(--card);border:1px solid var(--border);border-radius:100px;
  color:var(--text);font-family:'Inter',sans-serif;font-size:.88rem;
  transition:.3s var(--ease);outline:none}
.search-input::placeholder{color:var(--text-dim)}
.search-input:focus{border-color:var(--cyan);box-shadow:0 0 20px var(--cyan-dim)}
.search-wrap{position:relative}
.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);
  color:var(--text-dim);font-size:.9rem;pointer-events:none}

/* === FEATURED CARD === */
.featured{margin-bottom:2rem}
.featured .index-card{border-color:rgba(0,212,255,.15);position:relative;overflow:hidden;
  padding:2.5rem 2.5rem 2rem}
.featured .index-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--purple))}
.featured .index-card h2{font-size:1.25rem;margin-bottom:.75rem}
.featured .index-card p{font-size:.92rem;line-height:1.7}
.featured-badge{font-size:.65rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--cyan);background:var(--cyan-dim);padding:.15rem .5rem;border-radius:100px;
  margin-bottom:.75rem;display:inline-block}

/* === CARDS GRID === */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
.index-card{display:block;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);padding:1.75rem 2rem;transition:.3s var(--ease)}
.index-card:hover{border-color:rgba(0,212,255,.2);background:var(--surface);transform:translateY(-2px)}
.index-card h2{font-family:'Inter',sans-serif;font-size:.98rem;font-weight:600;
  margin-bottom:.5rem;color:var(--text);letter-spacing:0;line-height:1.35}
.index-card p{font-size:.82rem;color:var(--text-secondary);line-height:1.55;
  margin-bottom:.75rem;font-weight:300;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.read-more{font-size:.75rem;font-weight:600;color:var(--cyan)}

footer{padding:2rem 0;border-top:1px solid var(--border);text-align:center;font-size:.75rem;color:var(--text-dim)}
footer a{color:var(--cyan);transition:color .2s}footer a:hover{color:var(--text)}

/* === RESPONSIVE === */
@media(max-width:700px){
  .cards{grid-template-columns:1fr}
  .page{padding:2rem 1rem 3rem}
  .featured .index-card{padding:1.75rem 1.5rem}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}