:root{
  --ink:#1a1228;
  --ink-soft:#3d2f5a;
  --paper:#faf8f5;
  --cream:#f2ede6;
  --accent:#6c3fc5;
  --accent2:#c53f8a;
  --gold:#c8972a;
  --border:rgba(108,63,197,0.15);
  --text:#2d2040;
  --muted:#7a6e8a;
}

.orb{
  position:fixed;border-radius:50%;filter:blur(80px);pointer-events:none;z-index:0;
}
.orb-1{width:600px;height:600px;background:radial-gradient(circle,rgba(108,63,197,0.08),transparent 70%);top:-200px;right:-100px;}
.orb-2{width:400px;height:400px;background:radial-gradient(circle,rgba(197,63,138,0.06),transparent 70%);bottom:100px;left:-100px;}
.orb-3{width:300px;height:300px;background:radial-gradient(circle,rgba(200,151,42,0.07),transparent 70%);top:40%;left:30%;}

/* ── LAYOUT ── */
.wrap{
  position:relative;z-index:1;
  max-width:860px;margin:0 auto;
  padding:5rem 2rem 6rem;
}

/* ── HEADER ── */
.page-header{
  text-align:center;
  margin-bottom:4.5rem;
  animation:fadeDown 0.7s cubic-bezier(0.16,1,0.3,1) both;
}

.header-badge{
  display:inline-flex;align-items:center;gap:0.5rem;
  background:rgba(108,63,197,0.08);
  border:1px solid rgba(108,63,197,0.2);
  border-radius:100px;
  padding:0.35rem 1rem;
  font-size:0.68rem;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:1.5rem;
}

.header-badge span.dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  animation:blink 2s ease infinite;
}

@keyframes blink{0%,100%{opacity:1}50%{opacity:0.3}}

.page-title{
  font-family:'Playfair Display',serif;
  font-size:clamp(2.2rem,5vw,3.6rem);
  font-weight:400;
  color:var(--ink);
  line-height:1.1;
  letter-spacing:-0.02em;
  margin-bottom:1rem;
}

.page-title em{
  font-style:italic;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}

.page-subtitle{
  font-size:1rem;color:var(--muted);font-weight:300;
  max-width:460px;margin:0 auto;line-height:1.7;
}

/* ── FILTER PILLS ── */
.filter-row{
  display:flex;flex-wrap:wrap;gap:0.5rem;
  justify-content:center;
  margin-bottom:3rem;
  animation:fadeDown 0.7s 0.1s both;
}

.filter-pill{
  padding:0.4rem 1.1rem;
  border:1px solid var(--border);
  border-radius:100px;
  font-size:0.78rem;
  color:var(--muted);
  cursor:pointer;
  background:white;
  transition:all 0.25s;
  font-family:'Outfit',sans-serif;
}

.filter-pill:hover,.filter-pill.active{
  background:var(--accent);
  border-color:var(--accent);
  color:white;
  box-shadow:0 4px 16px rgba(108,63,197,0.25);
}

/* ── SEARCH ── */
.search-wrap{
  position:relative;max-width:480px;margin:0 auto 3rem;
  animation:fadeDown 0.7s 0.15s both;
}

.search-input{
  width:100%;
  padding:0.85rem 1rem 0.85rem 3rem;
  border:1px solid var(--border);
  border-radius:100px;
  background:white;
  font-family:'Outfit',sans-serif;
  font-size:0.9rem;
  color:var(--text);
  outline:none;
  transition:all 0.3s;
  box-shadow:0 2px 12px rgba(108,63,197,0.06);
}

.search-input:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(108,63,197,0.08),0 4px 20px rgba(108,63,197,0.1);
}

.search-icon{
  position:absolute;left:1.1rem;top:50%;transform:translateY(-50%);
  color:var(--muted);font-size:0.9rem;pointer-events:none;
}

/* ── ACCORDION ── */
.accordion-list{
  display:flex;flex-direction:column;gap:0.9rem;
}

.acc-item{
  background:white;
  border:1px solid rgba(108,63,197,0.1);
  border-radius:16px;
  overflow:hidden;
  transition:all 0.4s cubic-bezier(0.16,1,0.3,1);
  box-shadow:0 2px 8px rgba(108,63,197,0.04);
  animation:slideUp 0.5s both;
}

.acc-item:hover{
  border-color:rgba(108,63,197,0.25);
  box-shadow:0 8px 32px rgba(108,63,197,0.1);
  transform:translateY(-2px);
}

.acc-item.open{
  border-color:rgba(108,63,197,0.3);
  box-shadow:0 12px 40px rgba(108,63,197,0.12);
  transform:translateY(-2px);
}

/* stagger animation */
.acc-item:nth-child(1){animation-delay:0.05s}
.acc-item:nth-child(2){animation-delay:0.1s}
.acc-item:nth-child(3){animation-delay:0.15s}
.acc-item:nth-child(4){animation-delay:0.2s}
.acc-item:nth-child(5){animation-delay:0.25s}
.acc-item:nth-child(6){animation-delay:0.3s}
.acc-item:nth-child(7){animation-delay:0.35s}
.acc-item:nth-child(8){animation-delay:0.4s}
.acc-item:nth-child(9){animation-delay:0.45s}
.acc-item:nth-child(10){animation-delay:0.5s}
.acc-item:nth-child(11){animation-delay:0.55s}

@keyframes slideUp{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:translateY(0)}
}

/* ── QUESTION BUTTON ── */
.acc-head{
  display:flex;align-items:center;gap:1rem;
  width:100%;padding:1.4rem 1.6rem;
  background:none;border:none;text-align:left;
  cursor:pointer;
  position:relative;
  overflow:hidden;
}

/* shimmer on hover */
.acc-head::before{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(108,63,197,0.04) 0%,rgba(197,63,138,0.03) 100%);
  opacity:0;
  transition:opacity 0.3s;
}
.acc-head:hover::before,.acc-item.open .acc-head::before{opacity:1}

.acc-num{
  width:32px;height:32px;flex-shrink:0;
  border-radius:10px;
  background:rgba(108,63,197,0.07);
  display:flex;align-items:center;justify-content:center;
  font-size:0.72rem;font-weight:500;
  color:var(--accent);
  transition:all 0.3s;
  border:1px solid rgba(108,63,197,0.1);
}

.acc-item.open .acc-num{
  background:var(--accent);
  color:white;
  border-color:var(--accent);
  box-shadow:0 4px 12px rgba(108,63,197,0.3);
}

.acc-tag{
  font-size:0.62rem;letter-spacing:0.12em;text-transform:uppercase;
  padding:0.2rem 0.6rem;
  border-radius:100px;
  font-weight:500;
  flex-shrink:0;
}

.tag-paper{background:rgba(200,151,42,0.1);color:#a07820;}
.tag-review{background:rgba(108,63,197,0.1);color:var(--accent);}
.tag-method{background:rgba(197,63,138,0.1);color:var(--accent2);}
.tag-thesis{background:rgba(39,174,96,0.1);color:#1a8046;}
.tag-guide{background:rgba(52,152,219,0.1);color:#1a6ea3;}

.acc-q{
  flex:1;
  font-family:'Outfit',sans-serif;
  font-size:0.98rem;
  font-weight:500;
  color:var(--ink);
  line-height:1.4;
  transition:color 0.3s;
}

.acc-item.open .acc-q{color:var(--accent);}

.acc-icon{
  width:32px;height:32px;flex-shrink:0;
  border-radius:50%;
  border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);
  transition:all 0.4s cubic-bezier(0.34,1.56,0.64,1);
  background:white;
}

.acc-item.open .acc-icon{
  background:var(--accent);
  border-color:var(--accent);
  color:white;
  transform:rotate(45deg);
  box-shadow:0 4px 12px rgba(108,63,197,0.3);
}

/* ── ANSWER PANEL ── */
.acc-body{
  max-height:0;
  overflow:hidden;
  transition:max-height 0.45s cubic-bezier(0.16,1,0.3,1);
}

.acc-body-inner{
  padding:0 1.6rem 1.6rem 4.6rem;
  border-top:1px solid rgba(108,63,197,0.07);
}

.acc-answer{
  font-size:0.91rem;
  color:var(--muted);
  line-height:1.8;
  padding-top:1.1rem;
}

.acc-answer strong{color:var(--ink);}

.learn-link{
  display:inline-flex;align-items:center;gap:0.4rem;
  margin-top:0.9rem;
  font-size:0.78rem;
  font-weight:500;
  color:var(--accent);
  text-decoration:none;
  padding:0.4rem 0.9rem;
  border:1px solid rgba(108,63,197,0.2);
  border-radius:100px;
  transition:all 0.25s;
  background:rgba(108,63,197,0.04);
}

.learn-link:hover{
  background:var(--accent);
  color:white;
  border-color:var(--accent);
  box-shadow:0 4px 12px rgba(108,63,197,0.25);
  transform:translateX(3px);
}

.learn-link svg{
  transition:transform 0.25s;
}
.learn-link:hover svg{transform:translateX(3px);}

/* ── LEFT ACCENT BAR ── */
.acc-body-inner{
  position:relative;
}
.acc-body-inner::before{
  content:'';
  position:absolute;
  left:2.2rem;top:1.2rem;bottom:0;
  width:2px;
  background:linear-gradient(180deg,var(--accent),rgba(197,63,138,0.3),transparent);
  border-radius:2px;
}

/* ── FOOTER ── */
.page-footer{
  text-align:center;
  margin-top:4rem;
  padding-top:2.5rem;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:0.82rem;
  animation:fadeDown 0.7s 0.6s both;
}

.page-footer a{color:var(--accent);text-decoration:none;}
.page-footer a:hover{text-decoration:underline;}

/* ── EMPTY STATE ── */
.empty-state{
  text-align:center;padding:3rem;
  display:none;
  color:var(--muted);
}
.empty-state h3{font-size:1.1rem;margin-bottom:0.5rem;color:var(--ink);}

/* ── ANIMS ── */
@keyframes fadeDown{
  from{opacity:0;transform:translateY(-16px)}
  to{opacity:1;transform:translateY(0)}
}

/* ── MOBILE ── */
@media(max-width:600px){
  .wrap{padding:3rem 1.2rem 4rem}
  .acc-tag{display:none}
  .acc-body-inner{padding-left:3.2rem}
  .acc-body-inner::before{left:1.2rem}
}