/* ============================================================
   PromptOS — Components: cards, badges, buttons, empty & toast
   ============================================================ */
.cat-heading{grid-column:1/-1;display:flex;align-items:center;gap:9px;margin:22px 0 11px;font-size:11px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;}
.cat-heading:first-child{margin-top:0;}
.cat-heading svg{width:14px;height:14px;}
.cat-heading-line{flex:1;height:1px;background:var(--cbo);opacity:.5;}
.cat-heading-count{font-size:10px;opacity:.55;font-weight:600;text-transform:none;letter-spacing:0;font-family:var(--f-mono);}

.grid{display:grid;grid-template-columns:1fr;gap:13px;}
.grid.lv .prompt-area{min-height:64px;max-height:96px;}

.card{
  --ch:#5B4FE8;--cbg:rgba(91,79,232,.07);--cbo:rgba(91,79,232,.2);
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);
  overflow:hidden;position:relative;
  box-shadow:var(--shadow-sm);
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
  animation:cardIn .32s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes cardIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg),0 0 0 1px var(--cbo);border-color:var(--cbo);}

.card-tab{display:flex;align-items:center;gap:8px;padding:9px 12px;background:var(--surface-2);border-bottom:1px solid var(--border);}
.card-tab-dot{width:8px;height:8px;border-radius:50%;background:var(--ch);flex-shrink:0;}
.card-tab-name{font-family:var(--f-mono);font-size:10.5px;color:var(--ink-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;}
.card-tab-cat{
  display:flex;align-items:center;gap:4px;flex-shrink:0;
  font-size:9.5px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;
  color:var(--ch);background:var(--cbg);border:1px solid var(--cbo);
  padding:2px 8px;border-radius:20px;
}
.card-tab-cat svg{width:10px;height:10px;}

.card-head{padding:12px 14px 0;}
.card-title{font-family:var(--f-display);font-size:14.5px;font-weight:600;color:var(--ink);line-height:1.32;margin-bottom:7px;}
.card-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px;}
.src-tag{font-size:10.5px;color:var(--ink-3);font-weight:600;}
.field-pill{
  font-family:var(--f-mono);font-size:9.5px;font-weight:700;padding:2px 8px;border-radius:8px;
  background:#FFF4E8;border:1px solid #FFDDB8;color:#B45309;
}
.card-actions{display:flex;gap:5px;margin-left:auto;}
.icon-btn{
  background:var(--surface);border:1px solid var(--border);color:var(--ink-2);cursor:pointer;
  border-radius:7px;display:flex;align-items:center;justify-content:center;
  width:30px;height:30px;transition:all var(--tr);flex-shrink:0;
}
.icon-btn svg{width:13px;height:13px;}
.icon-btn:hover{background:var(--surface-2);border-color:var(--border-strong);}
.icon-btn.faved{background:#FFF7E6;border-color:#FBBF24;color:#B45309;}
.copy-btn{
  background:var(--ink);color:#fff;border:1px solid var(--ink);cursor:pointer;
  border-radius:7px;font-size:11.5px;font-weight:700;padding:0 12px;height:30px;
  display:flex;align-items:center;gap:5px;transition:all var(--tr);flex-shrink:0;
}
.copy-btn svg{width:12px;height:12px;}
.copy-btn:hover{background:var(--brand-1);border-color:var(--brand-1);}
.copy-btn.copied{background:var(--success);border-color:var(--success);}

.card-body{padding:0 14px 14px;}
.prompt-area{
  width:100%;background:var(--code-bg);border:1px solid var(--border);
  color:var(--ink-2);font-family:var(--f-mono);font-size:11.5px;line-height:1.7;
  padding:11px 12px;border-radius:var(--r-md);resize:vertical;
  min-height:142px;max-height:280px;outline:none;
  border-left:3px solid var(--ch);
  transition:border-color var(--tr),background var(--tr),color var(--tr);
}
.prompt-area:focus{background:var(--surface);color:var(--ink);border-color:var(--cbo);border-left-color:var(--ch);}

.empty{grid-column:1/-1;text-align:center;padding:70px 20px;color:var(--ink-3);}
.empty svg{width:40px;height:40px;margin:0 auto 14px;color:var(--ink-3);opacity:.5;}
.empty h3{font-family:var(--f-display);font-size:18px;color:var(--ink-2);margin-bottom:6px;}
.empty p{font-size:13px;}

#toast{
  position:fixed;bottom:78px;right:16px;left:16px;z-index:9999;
  background:var(--ink);color:#fff;font-size:12.5px;font-weight:700;
  padding:11px 16px;border-radius:var(--r-md);box-shadow:var(--shadow-lg);
  transform:translateY(70px);opacity:0;
  transition:all .3s cubic-bezier(.34,1.56,.64,1);
  pointer-events:none;display:flex;align-items:center;justify-content:center;gap:8px;
}
#toast svg{width:14px;height:14px;color:var(--success);flex-shrink:0;}
#toast.on{transform:none;opacity:1;}

/* ------------------------------------------------------------
   Generic buttons — used on the home / about / favourites pages
   ------------------------------------------------------------ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--f-body);font-size:13.5px;font-weight:700;
  padding:12px 20px;border-radius:var(--r-md);cursor:pointer;
  transition:all var(--tr);border:1px solid transparent;white-space:nowrap;
}
.btn svg{width:15px;height:15px;}
.btn-primary{background:var(--ink);color:#fff;box-shadow:var(--shadow-md);}
.btn-primary:hover{background:var(--brand-1);transform:translateY(-1px);box-shadow:var(--shadow-lg);}
.btn-ghost{background:var(--surface);color:var(--ink-2);border-color:var(--border);box-shadow:var(--shadow-sm);}
.btn-ghost:hover{border-color:var(--border-strong);color:var(--ink);}
.btn-grad{background:linear-gradient(120deg,var(--brand-1),var(--brand-2));color:#fff;box-shadow:0 8px 22px rgba(91,79,232,.28);}
.btn-grad:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(91,79,232,.36);}

/* ------------------------------------------------------------
   Section scaffolding — home & about pages
   ------------------------------------------------------------ */
.section{padding:52px 16px;position:relative;}
.section-inner{max-width:var(--page-max);margin:0 auto;}
.section-head{max-width:640px;margin-bottom:32px;}
.section-eyebrow{
  font-family:var(--f-mono);font-size:10.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--brand-1);margin-bottom:8px;display:flex;align-items:center;gap:7px;
}
.section-eyebrow::before{content:'';width:16px;height:2px;background:var(--brand-1);border-radius:2px;}
.section-head h2{font-family:var(--f-display);font-weight:700;letter-spacing:-.4px;font-size:clamp(21px,4.2vw,28px);color:var(--ink);margin-bottom:10px;}
.section-head p{font-size:14px;color:var(--ink-2);line-height:1.65;}
.section-alt{background:var(--surface-2);}

/* Stat strip */
.stat-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;}
.stat-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:18px 16px;box-shadow:var(--shadow-sm);transition:transform var(--tr),box-shadow var(--tr);
}
.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);}
.stat-card b{display:block;font-family:var(--f-display);font-size:clamp(24px,5vw,32px);font-weight:700;color:var(--ink);letter-spacing:-.5px;}
.stat-card span{font-size:11.5px;color:var(--ink-3);font-weight:600;}

/* Feature cards */
.feature-grid{display:grid;grid-template-columns:1fr;gap:14px;}
.feature-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--shadow-sm);transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--border-strong);}
.feature-icon{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;margin-bottom:14px;
  background:var(--fbg,rgba(91,79,232,.1));color:var(--fc,var(--brand-1));
}
.feature-icon svg{width:19px;height:19px;}
.feature-card h3{font-family:var(--f-display);font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.feature-card p{font-size:12.8px;color:var(--ink-2);line-height:1.6;}

/* Category showcase cards (home page grid, richer than the mini hero tiles) */
.cat-card-grid{display:grid;grid-template-columns:1fr;gap:10px;}
.cat-card{
  --ic:var(--ch);
  display:flex;align-items:center;gap:13px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:15px 16px;box-shadow:var(--shadow-sm);transition:all var(--tr);text-align:left;
}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--cbo);}
.cat-card-icon{
  width:42px;height:42px;border-radius:11px;flex-shrink:0;display:grid;place-items:center;
  background:var(--cbg);color:var(--ch);
}
.cat-card-icon svg{width:20px;height:20px;}
.cat-card-body{min-width:0;flex:1;}
.cat-card-title{font-family:var(--f-display);font-weight:700;font-size:13.5px;color:var(--ink);margin-bottom:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.cat-card-count{font-family:var(--f-mono);font-size:11px;color:var(--ink-3);}
.cat-card-arrow{margin-left:auto;flex-shrink:0;color:var(--ink-3);transition:transform var(--tr),color var(--tr);}
.cat-card-arrow svg{width:16px;height:16px;}
.cat-card:hover .cat-card-arrow{transform:translateX(3px);color:var(--ch);}

/* Timeline / step list (about page — "how it works") */
.step-list{display:flex;flex-direction:column;gap:0;}
.step{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--border);}
.step:last-child{border-bottom:none;}
.step-num{
  font-family:var(--f-mono);font-weight:700;font-size:12px;color:var(--brand-1);
  background:rgba(91,79,232,.08);border:1px solid rgba(91,79,232,.18);
  width:30px;height:30px;border-radius:9px;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.step-body h3{font-family:var(--f-display);font-size:14.5px;font-weight:700;color:var(--ink);margin-bottom:4px;}
.step-body p{font-size:13px;color:var(--ink-2);line-height:1.6;max-width:520px;}

/* CTA band */
.cta-band{
  background:linear-gradient(120deg,var(--ink) 0%,#23244a 60%,var(--brand-1) 140%);
  border-radius:var(--r-2xl);padding:36px 24px;text-align:center;color:#fff;position:relative;overflow:hidden;
}
.cta-band::before{
  content:'';position:absolute;inset:0;opacity:.5;pointer-events:none;
  background:radial-gradient(circle at 20% 20%,rgba(6,182,212,.35),transparent 55%),radial-gradient(circle at 85% 80%,rgba(255,120,73,.28),transparent 50%);
}
.cta-band-inner{position:relative;z-index:1;max-width:520px;margin:0 auto;}
.cta-band h2{font-family:var(--f-display);font-size:clamp(20px,5vw,27px);font-weight:700;margin-bottom:10px;letter-spacing:-.4px;}
.cta-band p{font-size:13.5px;opacity:.82;margin-bottom:20px;line-height:1.6;}
.cta-band .btn-primary{background:#fff;color:var(--ink);}
.cta-band .btn-primary:hover{background:var(--brand-2);color:#fff;}

/* Badge */
.badge{
  display:inline-flex;align-items:center;gap:5px;font-family:var(--f-mono);font-size:10.5px;font-weight:700;
  padding:3px 9px;border-radius:20px;background:var(--surface-2);border:1px solid var(--border);color:var(--ink-2);
}

/* Skeleton loading state for cards (progressive render) */
.skeleton{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);height:220px;overflow:hidden;position:relative;}
.skeleton::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.65),transparent);
  transform:translateX(-100%);animation:shimmer 1.3s infinite;
}
@keyframes shimmer{100%{transform:translateX(100%);}}

/* Favourites empty state illustration wrapper */
.fav-empty-icon{
  width:64px;height:64px;border-radius:18px;margin:0 auto 16px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(91,79,232,.1),rgba(6,182,212,.08));color:var(--brand-1);
}
.fav-empty-icon svg{width:28px;height:28px;}

@media(min-width:640px){
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .stat-strip{grid-template-columns:repeat(4,1fr);}
}
@media(min-width:960px){
  .feature-grid{grid-template-columns:repeat(3,1fr);}
}

/* ------------------------------------------------------------
   Home hero — signature visual: a stack of "open file tabs"
   mirroring the prompt-card metaphor used across the library
   ------------------------------------------------------------ */
.home-hero{position:relative;overflow:hidden;padding:38px 16px 30px;border-bottom:1px solid var(--border);}
.home-hero-inner{position:relative;z-index:1;max-width:var(--page-max);margin:0 auto;}
.home-hero h1{
  font-family:var(--f-display);font-weight:700;letter-spacing:-.6px;
  font-size:clamp(30px,8.5vw,52px);line-height:1.05;color:var(--ink);margin-bottom:14px;
}
.home-hero h1 .grad{
  background:linear-gradient(120deg,var(--brand-1),var(--brand-2) 55%,var(--brand-3));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.home-hero-sub{font-size:15px;color:var(--ink-2);max-width:460px;line-height:1.65;margin-bottom:22px;}
.home-hero-sub .hl{color:var(--ink);font-weight:700;font-family:var(--f-mono);background:rgba(255,120,73,.12);padding:0 5px;border-radius:5px;}
.home-hero-ctas{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.home-hero-stats{display:flex;flex-wrap:wrap;gap:18px;}
.home-hero-stat b{display:block;font-family:var(--f-display);font-size:20px;font-weight:700;color:var(--ink);letter-spacing:-.4px;}
.home-hero-stat span{font-size:10.5px;color:var(--ink-3);font-weight:600;text-transform:uppercase;letter-spacing:.04em;}

.file-stack{position:relative;height:230px;margin-top:32px;}
.file-card{
  position:absolute;left:50%;top:0;width:min(300px,84vw);
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--shadow-lg);overflow:hidden;
  animation:floatCard 7s ease-in-out infinite;
}
.file-card .card-tab{padding:8px 11px;}
.file-card .card-tab-name{font-size:10px;}
.file-card .fc-lines{padding:12px 13px 14px;display:flex;flex-direction:column;gap:7px;}
.file-card .fc-lines span{display:block;height:7px;border-radius:4px;background:var(--code-bg);}
.file-card-1{transform:translate(-72%,6px) rotate(-7deg);z-index:1;animation-delay:0s;}
.file-card-2{transform:translate(-42%,34px) rotate(4deg);z-index:2;animation-delay:-2.3s;}
.file-card-3{transform:translate(-58%,74px) rotate(-2deg);z-index:3;animation-delay:-4.6s;}
@keyframes floatCard{0%,100%{margin-top:0;}50%{margin-top:-10px;}}

@media(min-width:640px){
  .home-hero{padding:52px 24px 40px;}
}
@media(min-width:960px){
  .home-hero-flex{display:flex;align-items:center;gap:40px;}
  .home-hero-text{flex:1;max-width:560px;}
  .home-hero-visual{flex:1;max-width:460px;}
  .file-stack{height:280px;margin-top:0;}
  .file-card{width:300px;}
}

/* ------------------------------------------------------------
   FAQ accordion (about page)
   ------------------------------------------------------------ */
.faq-list{display:flex;flex-direction:column;gap:10px;}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-sm);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 18px;font-family:var(--f-display);font-weight:600;font-size:14px;color:var(--ink);
}
.faq-q .faq-plus{flex-shrink:0;width:22px;height:22px;border-radius:7px;background:var(--surface-2);display:grid;place-items:center;transition:transform var(--tr),background var(--tr);color:var(--ink-2);}
.faq-q .faq-plus svg{width:12px;height:12px;}
.faq-item.open .faq-q .faq-plus{transform:rotate(45deg);background:rgba(91,79,232,.1);color:var(--brand-1);}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--tr-slow);}
.faq-item.open .faq-a{max-height:240px;}
.faq-a-inner{padding:0 18px 16px;font-size:13px;color:var(--ink-2);line-height:1.65;}