/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;border-radius:999px;
  font-weight:500;font-size:.98rem;letter-spacing:-.005em;
  transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
  will-change:transform;
}
.btn .arrow{display:inline-block;transition:transform .3s var(--ease)}
.btn:hover .arrow{transform:translate(4px,-2px)}
.btn-primary{background:var(--paper);color:var(--ink);box-shadow:0 1px 0 rgba(255,255,255,.08) inset, 0 12px 30px -16px rgba(0,0,0,.6)}
.btn-primary:hover{background:#fff;transform:translateY(-1px)}
.section-light .btn-primary{background:var(--ink);color:var(--paper)}
.section-light .btn-primary:hover{background:#1a1a1d}
.btn-ghost{color:inherit;border:1px solid var(--hairline-dark);background:transparent}
.btn-ghost:hover{border-color:var(--text-md);background:rgba(255,255,255,.04)}
.section-light .btn-ghost{border-color:var(--hairline-light)}
.section-light .btn-ghost:hover{background:rgba(0,0,0,.04)}
.btn-lg{padding:18px 28px;font-size:1.05rem}
.btn-pulse{animation:btnPulse 2.6s var(--ease) infinite}
@keyframes btnPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.018)}}

/* Card — defaults light, overrides dark via .section-dark */
.card{
  position:relative;display:flex;flex-direction:column;gap:14px;
  background:#ffffff;
  border:1.5px solid rgba(0,0,0,.12);
  border-radius:var(--radius-lg);
  padding:32px;min-height:240px;
  color:var(--ink-text-hi);
  transition:transform .3s var(--ease),border-color .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease);
  overflow:hidden;
}
.card:hover{transform:translateY(-4px);border-color:var(--ink-text-lo);box-shadow:0 24px 50px -28px rgba(0,0,0,.18)}
.card-tag{font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:500}
.card-title{font-size:1.32rem;line-height:1.2;letter-spacing:-.02em;font-weight:600;color:var(--ink-text-hi);text-wrap:balance}
.card-desc{color:var(--ink-text-md);font-size:.98rem;line-height:1.55}
.card-arrow{position:absolute;right:24px;bottom:22px;font-size:1.2rem;color:var(--ink-text-md);transition:transform .3s var(--ease),color .3s var(--ease)}
.card:hover .card-arrow{transform:translate(6px,-6px);color:var(--ink-text-hi)}

.section-dark .card{
  background:var(--ink-2);
  border:1px solid var(--hairline-dark);
  color:var(--text-hi);
}
.section-dark .card:hover{border-color:rgba(232,255,107,.4);background:#121215;box-shadow:0 30px 60px -30px rgba(0,0,0,.7)}
.section-dark .card-title{color:var(--text-hi)}
.section-dark .card-desc{color:var(--text-lo)}
.section-dark .card-arrow{color:var(--accent)}
.section-dark .card:hover .card-arrow{color:var(--accent)}

/* Blog cards */
.blog .section-head{margin-bottom:40px}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media (max-width:900px){.blog-grid{grid-template-columns:1fr}}
.bcard{
  position:relative;display:flex;flex-direction:column;justify-content:space-between;
  background:#ffffff;
  border:0.5px solid var(--bone);
  border-radius:12px;
  padding:32px;min-height:280px;
  color:var(--ink);
  text-decoration:none;
  will-change:transform;overflow:hidden;
}
a.bcard{cursor:pointer}
.bcard-tag{
  font-size:11px;letter-spacing:2px;text-transform:uppercase;
  color:var(--gold);font-weight:500;
}
.bcard-title{
  font-family:var(--font-display);font-weight:600;
  font-size:16px;line-height:1.35;letter-spacing:-.01em;
  color:var(--ink);margin-top:12px;
}
.bcard-desc{
  font-weight:400;font-size:13px;line-height:1.7;
  color:var(--ink-text-lo);margin-top:8px;
}
.bcard-arrow{
  position:absolute;right:24px;bottom:22px;
  font-size:1.1rem;color:var(--gold);
}
.bcard.is-soon{
  background:var(--paper-2);
  border-color:var(--bone);
  cursor:default;pointer-events:none;
}
.bcard.is-soon .bcard-tag{color:var(--ink-text-lo)}
.bcard.is-soon .bcard-title{color:var(--ink-text-lo)}

/* Accordion — defaults light, overrides dark via .section-dark */
.accordion{border-top:1px solid var(--hairline-light)}
.acc-item{border-bottom:1px solid var(--hairline-light)}
.acc-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 4px;font-family:var(--font-display);font-weight:500;
  font-size:clamp(1.05rem,1.6vw,1.3rem);letter-spacing:-.015em;
}
.acc-item summary::-webkit-details-marker{display:none}
.acc-icon{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:50%;
  border:1px solid var(--hairline-light);font-style:normal;font-weight:400;
  transition:transform .35s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
  flex:0 0 auto;
}
.acc-item[open] .acc-icon{transform:rotate(45deg);background:var(--ink);color:var(--paper);border-color:var(--ink)}
.acc-content{overflow:hidden;height:0;opacity:0}
.acc-content p{padding:0 4px 26px;color:var(--ink-text-md);max-width:70ch}

.section-dark .accordion{border-top-color:var(--hairline-dark)}
.section-dark .acc-item{border-bottom-color:var(--hairline-dark)}
.section-dark .acc-item summary{color:var(--text-hi)}
.section-dark .acc-icon{border-color:var(--hairline-dark);color:var(--text-md)}
.section-dark .acc-item[open] .acc-icon{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.section-dark .acc-content p{color:var(--text-md)}

/* Reveal initial state */
.reveal,.split-words .word,.split-lines span,[data-stagger] > *{opacity:0;transform:translateY(24px)}
.reveal.is-in,.split-words.is-in .word,.split-lines.is-in span,[data-stagger].is-in > *{opacity:1;transform:none}

/* Chat */
.chat{
  position:fixed;inset:0;z-index:100;
  display:flex;align-items:stretch;justify-content:center;
  background:rgba(5,5,5,.85);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  opacity:0;pointer-events:none;transition:opacity .3s var(--ease);
}
.chat.is-open{opacity:1;pointer-events:auto}
.chat[hidden]{display:none}
.chat-shell{
  margin:auto;width:min(620px,100%);height:min(720px,100dvh);
  display:flex;flex-direction:column;
  background:var(--ink);color:var(--text-hi);
  border:1px solid var(--hairline-dark);border-radius:24px;
  overflow:hidden;
  transform:translateY(20px) scale(.98);transition:transform .35s var(--ease);
}
.chat.is-open .chat-shell{transform:none}
@media (max-width:640px){.chat-shell{height:100dvh;border-radius:0}}
.chat-head{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--hairline-dark)}
.chat-title{display:inline-flex;align-items:center;gap:10px;font-size:.95rem;color:var(--text-md)}
.chat-title .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
.chat-controls{display:flex;gap:6px}
.chat-back,.chat-close{
  width:34px;height:34px;border-radius:50%;color:var(--text-md);
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--hairline-dark);transition:background .2s var(--ease),color .2s var(--ease);
}
.chat-back:hover,.chat-close:hover{background:rgba(255,255,255,.06);color:var(--text-hi)}
.chat-progress{height:2px;background:rgba(255,255,255,.06)}
.chat-progress-bar{height:100%;width:0;background:var(--accent);transition:width .4s var(--ease)}
.chat-stream{flex:1;overflow-y:auto;padding:22px;display:flex;flex-direction:column;gap:14px;scroll-behavior:smooth}
.chat-stream::-webkit-scrollbar{width:6px}
.chat-stream::-webkit-scrollbar-thumb{background:rgba(255,255,255,.08);border-radius:3px}
.bubble{
  max-width:78%;padding:14px 18px;border-radius:18px;font-size:1rem;line-height:1.5;
  opacity:0;transform:translateY(10px);will-change:transform;
}
.bubble.is-in{opacity:1;transform:none}
.bubble.bot{background:var(--ink-2);border:1px solid var(--hairline-dark);align-self:flex-start;border-bottom-left-radius:6px}
.bubble.user{background:var(--paper);color:var(--ink);align-self:flex-end;border-bottom-right-radius:6px;font-weight:500}
.bubble.error{background:rgba(255,80,80,.08);border:1px solid rgba(255,80,80,.3);color:#ffb3b3}
.typing{display:inline-flex;gap:4px;align-self:flex-start;padding:14px 18px;background:var(--ink-2);border:1px solid var(--hairline-dark);border-radius:18px;border-bottom-left-radius:6px}
.typing span{width:6px;height:6px;border-radius:50%;background:var(--text-lo);animation:typing 1.2s infinite}
.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}
@keyframes typing{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:1}}
.chat-foot{padding:14px 18px 18px;border-top:1px solid var(--hairline-dark);background:var(--ink);max-height:42vh;overflow-y:auto}
.chat-foot::-webkit-scrollbar{width:6px}
.chat-foot::-webkit-scrollbar-thumb{background:rgba(255,255,255,.08);border-radius:3px}
.chat-form{display:flex;gap:10px;align-items:center}
.chat-form input,.chat-form select{
  flex:1;background:var(--ink-2);color:var(--text-hi);
  border:1px solid var(--hairline-dark);border-radius:14px;
  padding:14px 16px;font-size:1rem;outline:none;transition:border-color .2s var(--ease);
}
.chat-form input:focus,.chat-form select:focus{border-color:var(--accent)}
.chat-form button{
  background:var(--paper);color:var(--ink);
  padding:14px 18px;border-radius:14px;font-weight:500;
  display:inline-flex;align-items:center;gap:8px;transition:background .2s var(--ease),transform .2s var(--ease);
}
.chat-form button:hover{background:#fff;transform:translateY(-1px)}
.chat-form button:disabled{opacity:.5;cursor:not-allowed}
.chat-options{display:flex;flex-wrap:wrap;gap:10px}
.chat-options button{
  background:var(--ink-2);color:var(--text-hi);
  border:1px solid var(--hairline-dark);border-radius:999px;
  padding:12px 18px;font-size:.95rem;transition:border-color .2s var(--ease),background .2s var(--ease);
}
.chat-options button:hover{border-color:var(--accent);background:rgba(232,255,107,.06)}
.field-error{font-size:.85rem;color:#ffb3b3;margin-top:8px}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .reveal,.split-words .word,.split-lines span,[data-stagger] > *,.bubble{opacity:1!important;transform:none!important}
}