*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#0d0d0d;
  --bg2:#161616;
  --bg3:#1e1e1e;
  --bg4:#252525;
  --border:#2c2c2c;
  --border2:#3a3a3a;
  --text:#ffffff;
  --muted:#888;
  --dim:#4a4a4a;
  --radius:12px;
  --nav:60px;
}

html,body{height:100%;overflow:hidden}

body{
  font-family:'Inter',sans-serif;
  background:var(--bg);
  color:var(--text);
  display:flex;
  flex-direction:column;
  height:100vh;
}

nav{
  height:var(--nav);
  background:var(--bg);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;
  flex-shrink:0;
  z-index:200;
  position:relative;
}
.nav-logo{
  display:flex;align-items:center;gap:8px;
  font-weight:600;font-size:15px;
  color:var(--text);text-decoration:none;
}
.nav-logo svg{width:16px;height:16px;fill:#fff}
.nav-links{display:flex;gap:24px;list-style:none}
.nav-links a{color:var(--muted);text-decoration:none;font-size:14px;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--text)}

.page{
  flex:1;
  display:flex;
  flex-direction:column;
  overflow:hidden;
  position:relative;
}

.chat-scroll{
  flex:1;
  overflow-y:auto;
  overflow-x:hidden;
  position:relative;
}
.chat-scroll::-webkit-scrollbar{width:4px}
.chat-scroll::-webkit-scrollbar-track{background:transparent}
.chat-scroll::-webkit-scrollbar-thumb{background:var(--border2);border-radius:4px}

.hero-wrap{
  position:absolute;
  inset:0;
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  padding:16px 24px 80px;
  z-index:10;
  transition:opacity .3s ease,transform .3s ease;
  pointer-events: none;
}
.hero-wrap.gone{
  opacity:0;
  transform:translateY(-20px);
  pointer-events:none;
}

.hero-icon{
  width:60px;height:60px;
  background:var(--bg3);
  border:1px solid var(--border2);
  border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;
}
.hero-icon .material-symbols-outlined{
  font-size:30px;
  background:linear-gradient(135deg,#fff 0%,#999 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  font-variation-settings:'FILL' 0,'wght' 300;
}
.hero-title{font-size:1.85rem;font-weight:700;margin-bottom:10px;text-align:center}
.hero-desc{color:var(--muted);font-size:15px;text-align:center;margin-bottom:30px}

.quick-prompts{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;pointer-events:all;}
.qp-btn{
  display:flex;align-items:center;gap:6px;
  background:var(--bg3);border:1px solid var(--border2);
  color:var(--text);padding:9px 15px;
  border-radius:999px;font-size:13px;
  font-family:'Inter',sans-serif;cursor:pointer;
  transition:background .2s,border-color .2s;white-space:nowrap;
  pointer-events: all;
}
.qp-btn:hover{background:var(--bg4);border-color:#505050}
.qp-btn .material-symbols-outlined{font-size:15px;font-variation-settings:'FILL' 0,'wght' 400}

.chat-inner{
  display:flex;flex-direction:column;
  gap:18px;
  padding:20px 16px 16px;
  max-width:760px;width:100%;
  margin:0 auto;
}
.msg{display:flex;flex-direction:column;gap:5px;animation:msgIn .25s ease}
@keyframes msgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.msg.user{align-items:flex-end}
.msg.ai{align-items:flex-start}
.msg-label{font-size:11px;color:var(--dim);display:flex;align-items:center;gap:4px}
.msg-label .material-symbols-outlined{font-size:13px}
.msg-bubble{
  max-width:82%;padding:12px 16px;
  border-radius:var(--radius);
  font-size:14px;line-height:1.65;word-break:break-word;
}
.msg.user .msg-bubble{background:#fff;color:#000;border-bottom-right-radius:4px}
.msg.ai .msg-bubble{
  background:var(--bg3);border:1px solid var(--border);
  color:var(--text);border-bottom-left-radius:4px;
}
.msg-bubble img{max-width:100%;border-radius:8px;margin-top:8px;display:block}
.msg-bubble pre{
  background:#111;border:1px solid var(--border);
  border-radius:8px;padding:12px;margin-top:8px;
  overflow-x:auto;font-size:12.5px;position:relative;
}
.msg-bubble code{font-family:'Courier New',monospace}
.msg-bubble p{margin-bottom:6px}
.msg-bubble p:last-child{margin-bottom:0}
.typing-dots{display:flex;gap:4px;padding:4px 0}
.typing-dots span{
  width:6px;height:6px;background:var(--muted);
  border-radius:50%;animation:blink 1.2s infinite;
}
.typing-dots span:nth-child(2){animation-delay:.2s}
.typing-dots span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.2;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}

.bottom-bar{
  flex-shrink:0;
  background:var(--bg);
  border-top:1px solid var(--border);
  padding:10px 16px 16px;
  position:relative;
  z-index:9999;
}
.bottom-inner{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:8px}

.input-row{display:flex;align-items:flex-end;gap:8px}

.icon-btn{
  width:40px;height:40px;
  border-radius:10px;
  background:var(--bg3);border:1px solid var(--border);
  color:var(--text);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
  transition:background .2s,border-color .2s;
  position:relative;
  user-select:none;
}
.icon-btn:hover{background:var(--bg4);border-color:var(--border2)}
.icon-btn .material-symbols-outlined{font-size:20px;font-variation-settings:'FILL' 0,'wght' 400}

.input-wrap{
  flex:1;display:flex;align-items:flex-end;
  background:var(--bg3);border:1px solid var(--border);
  border-radius:var(--radius);padding:10px 14px;gap:8px;
  transition:border-color .2s;
}
.input-wrap:focus-within{border-color:#505050}
#user-input{
  flex:1;background:transparent;border:none;outline:none;
  color:var(--text);font-family:'Inter',sans-serif;
  font-size:14px;resize:none;max-height:120px;line-height:1.5;
}
#user-input::placeholder{color:var(--dim)}

.send-btn{
  width:38px;height:38px;border-radius:9px;
  background:#fff;color:#000;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;transition:opacity .2s,transform .1s;
}
.send-btn:hover{opacity:.85}
.send-btn:active{transform:scale(.95)}
.send-btn:disabled{opacity:.3;cursor:not-allowed}
.send-btn .material-symbols-outlined{font-size:18px}
.pop-wrap{position:relative;flex-shrink:0}

.pop-card{
  position:absolute;
  bottom:calc(100% + 10px);
  background:var(--bg2);
  border:1px solid var(--border2);
  border-radius:var(--radius);
  padding:6px;
  min-width:190px;
  box-shadow:0 8px 32px rgba(0,0,0,.7);
  z-index:400;
  opacity:0;
  transform:translateY(8px) scale(.97);
  pointer-events:none;
  transition:opacity .18s ease,transform .18s ease;
}
.pop-card.show{
  opacity:1;transform:translateY(0) scale(1);
  pointer-events:all;
}

.ai-footer{
  border-top:1px solid var(--border);
  background:var(--bg);
  padding:40px 16px 28px;
  margin-top:auto;
}

.ai-footer-inner{
  max-width:700px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  gap:16px;
}

.ai-footer-brand{
  display:flex;
  align-items:center;
  gap:6px;
  font-weight:600;
}

.ai-footer-brand .material-symbols-outlined{
  font-size:20px;
  background:linear-gradient(135deg,#fff,#777);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}

.ai-footer-brand h3{
  font-size:15px;
  font-weight:600;
}

.ai-footer-desc{
  font-size:13px;
  color:var(--muted);
  line-height:1.7;
  max-width:420px;
}

.ai-footer-nav{
  display:flex;
  gap:18px;
  flex-wrap:wrap;
  justify-content:center;
}

.ai-footer-nav a{
  font-size:13px;
  color:var(--muted);
  text-decoration:none;
  transition:.2s;
  position:relative;
}

.ai-footer-nav a:hover{
  color:var(--text);
}

.ai-footer-nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:0%;
  height:1px;
  background:#fff;
  transition:.25s;
}

.ai-footer-nav a:hover::after{
  width:100%;
}

.ai-footer-copy{
  font-size:11px;
  color:var(--dim);
  margin-top:10px;
}

@media(max-width:600px){
  .ai-footer{
    padding:32px 14px 22px;
  }

  .ai-footer-desc{
    font-size:12.5px;
  }

  .ai-footer-nav{
    gap:14px;
  }
}

#attach-card{left:0}
#model-card{right:0}

.pop-label{
  font-size:10.5px;color:var(--dim);
  padding:4px 10px 6px;
  text-transform:uppercase;letter-spacing:.7px;
}
.pop-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 11px;border-radius:8px;
  cursor:pointer;font-size:13px;color:var(--text);
  transition:background .15s;
}
.pop-item:hover{background:var(--bg3)}
.pop-item .material-symbols-outlined{
  font-size:18px;color:var(--muted);
  font-variation-settings:'FILL' 0,'wght' 400;
}
.pop-divider{height:1px;background:var(--border);margin:4px 0}

.model-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 11px;border-radius:8px;
  cursor:pointer;color:var(--text);
  transition:background .15s;
}
.model-item:hover{background:var(--bg3)}
.model-item.active{background:var(--bg3)}
.model-item .mi-icon{
  font-size:17px;color:var(--muted);
  font-variation-settings:'FILL' 0,'wght' 400;
}
.model-item .mi-check{
  margin-left:auto;font-size:15px;
  opacity:0;transition:opacity .15s;
}
.model-item.active .mi-check{opacity:1}
.mi-name{font-size:13px}
.mi-sub{font-size:11px;color:var(--muted)}

.footer-note{text-align:center;font-size:11px;color:var(--dim)}

#overlay{display:none;position:fixed;inset:0;z-index:200;pointer-events: none;}
#overlay.on{display:block;pointer-events: auto;}

@media(max-width:600px){
  nav{padding:0 14px}
  .nav-links{gap:14px}
  .nav-links a{font-size:13px}
  .hero-title{font-size:1.45rem}
  .hero-desc{font-size:13.5px}
  .qp-btn{font-size:12px;padding:8px 11px}
  .msg-bubble{max-width:90%;font-size:13.5px}
  #model-card{right:0;left:auto}
}

#img-preview-wrap{
  display:none;
  margin-bottom:8px;
}

.img-box{
  position:relative;
  display:inline-block;
}

#img-preview{
  max-width:120px;
  border-radius:10px;
  display:block;
  border:1px solid var(--border);
}

.img-remove{
  position:absolute;
  top:-6px;
  right:-6px;
  width:22px;
  height:22px;
  border:none;
  border-radius:50%;
  background:#000;
  color:#fff;
  font-size:14px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
}
.img-remove:hover{
  opacity:.8;
}

.copy-btn {
  position: absolute;
  top: 6px;
  right: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-radius: 7px;
  cursor: pointer;
  opacity: 0;
  transition: all .2s ease;
  z-index: 5;
}

.msg-bubble pre:hover .copy-btn {
  opacity: 1;
}

.copy-btn:hover {
  background: #2a2a2a;
  border-color: #505050;
}

.copy-btn .material-symbols-outlined {
  font-size: 16px;
  color: var(--muted);
  font-variation-settings: 'FILL' 0, 'wght' 400;
}

.copy-btn.copied {
  background: #0d2818;
  border-color: #2ecc71;
  opacity: 1;
}

.copy-btn.copied .material-symbols-outlined {
  color: #2ecc71;
}