*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#06060e;
  --bg2:#0c0c1a;
  --surface:rgba(255,255,255,0.04);
  --surface-hover:rgba(255,255,255,0.08);
  --border:rgba(255,255,255,0.08);
  --border-focus:rgba(99,102,241,0.5);
  --text:#ffffff;
  --text2:rgba(255,255,255,0.65);
  --text3:rgba(255,255,255,0.35);
  --primary:#6366f1;
  --primary-dark:#4f46e5;
  --purple:#a855f7;
  --gradient:linear-gradient(135deg,#6366f1,#a855f7,#ec4899);
  --gradient-2:linear-gradient(135deg,#06b6d4,#6366f1,#a855f7);
  --success:#22c55e;
  --error:#ef4444;
  --radius:16px;
  --radius-sm:10px;
  --radius-xs:6px;
  --font:'Inter',-apple-system,system-ui,sans-serif;
  --mono:'JetBrains Mono',monospace;
  --shadow:0 8px 32px rgba(0,0,0,0.4);
}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  min-height:100vh;
  overflow-x:hidden;
}
::selection{background:rgba(99,102,241,0.4)}

/* Nav */
.navbar{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  padding:0 24px;
  background:rgba(6,6,14,0.8);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;
  justify-content:space-between;
  height:64px;
}
.logo{
  font-size:1.5rem;
  font-weight:800;
  background:var(--gradient);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  text-decoration:none;
  letter-spacing:-0.03em;
}
.nav-links{display:flex;gap:32px}
.nav-links a{
  color:var(--text2);
  text-decoration:none;
  font-size:0.875rem;
  font-weight:500;
  transition:color 0.2s;
  position:relative;
}
.nav-links a::after{
  content:'';position:absolute;
  bottom:-2px;left:0;right:0;
  height:2px;background:var(--gradient);
  transform:scaleX(0);transition:transform 0.3s;
  border-radius:1px;
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-toggle{display:none;background:none;border:none;color:var(--text);cursor:pointer;padding:4px}

/* Hero */
#hero{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  position:relative;
  overflow:hidden;
  padding:80px 24px 60px;
}
.hero-bg{
  position:absolute;inset:0;
  overflow:hidden;
  pointer-events:none;
}
.orb{
  position:absolute;
  border-radius:50%;
  filter:blur(80px);
  opacity:0.4;
  animation:orbFloat 20s ease-in-out infinite;
}
.orb-1{
  width:600px;height:600px;
  background:var(--primary);
  top:-200px;right:-200px;
  animation-delay:0s;
}
.orb-2{
  width:500px;height:500px;
  background:var(--purple);
  bottom:-150px;left:-150px;
  animation-delay:-7s;
}
.orb-3{
  width:400px;height:400px;
  background:#06b6d4;
  top:50%;left:50%;
  transform:translate(-50%,-50%);
  animation-delay:-14s;
  opacity:0.2;
}
@keyframes orbFloat{
  0%,100%{transform:translate(0,0) scale(1)}
  25%{transform:translate(50px,-50px) scale(1.05)}
  50%{transform:translate(-30px,40px) scale(0.95)}
  75%{transform:translate(40px,30px) scale(1.02)}
}
.hero-content{
  position:relative;
  text-align:center;
  max-width:720px;
}
.hero-badge{
  display:inline-flex;align-items:center;
  padding:4px 14px;
  border-radius:999px;
  background:rgba(99,102,241,0.15);
  border:1px solid rgba(99,102,241,0.3);
  color:var(--primary);
  font-size:0.75rem;font-weight:600;
  text-transform:uppercase;letter-spacing:0.05em;
  margin-bottom:24px;
}
.hero-content h1{
  font-size:clamp(3rem,8vw,7rem);
  font-weight:900;
  line-height:1;
  letter-spacing:-0.04em;
  margin-bottom:20px;
  background:var(--gradient);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-subtitle{
  font-size:clamp(1rem,2vw,1.25rem);
  color:var(--text2);
  margin-bottom:40px;
  line-height:1.7;
}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 28px;
  border-radius:var(--radius-sm);
  font-family:var(--font);
  font-size:0.9375rem;font-weight:600;
  cursor:pointer;transition:all 0.25s;
  text-decoration:none;border:none;
}
.btn-primary{
  background:var(--gradient);
  color:#fff;
  box-shadow:0 4px 20px rgba(99,102,241,0.3);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 30px rgba(99,102,241,0.4);
}
.btn-secondary{
  background:var(--surface);
  color:var(--text);
  border:1px solid var(--border);
}
.btn-secondary:hover{
  background:var(--surface-hover);
  border-color:var(--text3);
}
.btn-sm{
  padding:6px 14px;font-size:0.8125rem;
  background:var(--surface);color:var(--text2);
  border:1px solid var(--border);border-radius:var(--radius-xs);
}
.btn-sm:hover{background:var(--surface-hover);color:var(--text)}
.btn-full{width:100%;justify-content:center;padding:14px 28px}

/* Sections */
.section{
  padding:100px 24px;
  max-width:1200px;margin:0 auto;
}
.section-header{
  text-align:center;
  margin-bottom:56px;
}
.section-label{
  display:inline-block;
  font-size:0.75rem;font-weight:600;
  text-transform:uppercase;letter-spacing:0.08em;
  color:var(--primary);
  margin-bottom:12px;
}
.section-header h2{
  font-size:clamp(2rem,4vw,3rem);
  font-weight:800;
  letter-spacing:-0.03em;
  margin-bottom:12px;
}
.section-header p{
  color:var(--text2);
  font-size:1.1rem;
  max-width:500px;margin:0 auto;
}

/* Steps */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.step-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px 28px;
  position:relative;
  transition:all 0.3s;
}
.step-card:hover{
  background:var(--surface-hover);
  border-color:rgba(99,102,241,0.2);
  transform:translateY(-4px);
}
.step-icon{
  width:48px;height:48px;
  border-radius:12px;
  background:rgba(99,102,241,0.12);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
  margin-bottom:20px;
}
.step-num{
  position:absolute;
  top:20px;right:24px;
  font-size:2.5rem;font-weight:900;
  color:rgba(255,255,255,0.04);
  line-height:1;
  letter-spacing:-0.04em;
}
.step-card h3{
  font-size:1.15rem;font-weight:700;
  margin-bottom:10px;
}
.step-card p{
  color:var(--text2);font-size:0.9rem;line-height:1.6;
}

/* Config */
.config-wrapper{
  max-width:540px;margin:0 auto;
}
.config-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px;
  backdrop-filter:blur(20px);
  transition:border-color 0.3s;
}
.config-card:focus-within{border-color:var(--border-focus)}
.form-group{margin-bottom:20px}
.form-group label{
  display:block;
  font-size:0.8125rem;font-weight:600;
  color:var(--text2);
  margin-bottom:8px;
}
.form-input{
  width:100%;
  padding:12px 16px;
  background:rgba(0,0,0,0.3);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  color:var(--text);
  font-family:var(--font);
  font-size:0.9375rem;
  transition:border-color 0.2s;
  outline:none;
}
.form-input:focus{border-color:var(--border-focus)}
.form-input::placeholder{color:var(--text3)}
select.form-input{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23ffffff' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}
.input-wrap{position:relative}
.input-wrap .form-input{padding-right:44px}
.toggle-btn{
  position:absolute;right:10px;top:50%;
  transform:translateY(-50%);
  background:none;border:none;
  color:var(--text3);cursor:pointer;
  padding:4px;display:flex;
  transition:color 0.2s;
}
.toggle-btn:hover{color:var(--text2)}

.config-result{
  margin-top:24px;
  padding:20px;
  background:rgba(34,197,94,0.05);
  border:1px solid rgba(34,197,94,0.2);
  border-radius:var(--radius-sm);
  animation:fadeSlide 0.4s ease-out;
}
.config-result.error{
  background:rgba(239,68,68,0.05);
  border-color:rgba(239,68,68,0.2);
}
.result-header{
  display:flex;align-items:center;gap:8px;
  color:var(--success);font-weight:600;font-size:0.9rem;
  margin-bottom:16px;
}
.config-result.error .result-header{color:var(--error)}
.result-body label{
  display:block;
  font-size:0.75rem;font-weight:600;
  color:var(--text3);text-transform:uppercase;letter-spacing:0.05em;
  margin-bottom:8px;
}
.endpoint-display{
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;
  background:rgba(0,0,0,0.3);
  border-radius:var(--radius-xs);
  border:1px solid var(--border);
  margin-bottom:12px;
}
.endpoint-display code{
  font-family:var(--mono);
  font-size:0.85rem;
  color:var(--primary);
  flex:1;
  word-break:break-all;
}
.result-tip{
  display:flex;align-items:flex-start;gap:8px;
  font-size:0.8rem;color:var(--text3);
  line-height:1.5;
}
.result-tip code{
  font-family:var(--mono);
  font-size:0.75rem;
  color:var(--text2);
  background:rgba(255,255,255,0.06);
  padding:1px 5px;
  border-radius:3px;
}
@keyframes fadeSlide{
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:translateY(0)}
}

/* Playground */
.playground-wrapper{
  max-width:700px;margin:0 auto;
}
.chat-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.chat-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;
  border-bottom:1px solid var(--border);
  flex-wrap:wrap;gap:12px;
}
.chat-model-select select{
  width:200px;padding:8px 12px;
  font-size:0.8125rem;
}
.chat-status{
  font-size:0.8rem;color:var(--text3);
}
.chat-messages{
  height:360px;overflow-y:auto;
  padding:20px;
  display:flex;flex-direction:column;gap:12px;
}
.chat-messages::-webkit-scrollbar{width:6px}
.chat-messages::-webkit-scrollbar-track{background:transparent}
.chat-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
.chat-empty{
  flex:1;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  gap:12px;color:var(--text3);
  font-size:0.9rem;
}
.msg{
  max-width:80%;
  padding:12px 16px;
  border-radius:12px;
  font-size:0.9rem;
  line-height:1.6;
  animation:msgIn 0.25s ease-out;
  word-break:break-word;
}
.msg.user{
  align-self:flex-end;
  background:var(--gradient);
  color:#fff;
  border-bottom-right-radius:4px;
}
.msg.assistant{
  align-self:flex-start;
  background:rgba(255,255,255,0.06);
  border:1px solid var(--border);
  border-bottom-left-radius:4px;
}
.msg.error{
  align-self:flex-start;
  background:rgba(239,68,68,0.1);
  border:1px solid rgba(239,68,68,0.2);
  color:var(--error);
}
.msg .msg-label{
  font-size:0.7rem;font-weight:600;
  text-transform:uppercase;letter-spacing:0.05em;
  margin-bottom:4px;opacity:0.6;
}
@keyframes msgIn{
  from{opacity:0;transform:translateY(8px) scale(0.97)}
  to{opacity:1;transform:translateY(0) scale(1)}
}
.chat-input-area{
  display:flex;gap:10px;
  padding:16px 20px;
  border-top:1px solid var(--border);
}
.chat-input-area .form-input{flex:1}
.chat-input-area .btn{white-space:nowrap;flex-shrink:0}

/* Code */
.code-wrapper{max-width:700px;margin:0 auto}
.code-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.code-tabs{
  display:flex;gap:0;
  border-bottom:1px solid var(--border);
  padding:0 4px;
}
.code-tab{
  padding:12px 20px;
  background:none;border:none;
  color:var(--text3);font-family:var(--font);
  font-size:0.875rem;font-weight:500;
  cursor:pointer;position:relative;
  transition:color 0.2s;
}
.code-tab:hover{color:var(--text2)}
.code-tab.active{color:var(--text)}
.code-tab.active::after{
  content:'';position:absolute;
  bottom:-1px;left:12px;right:12px;
  height:2px;background:var(--gradient);
  border-radius:1px;
}
.code-pane{
  position:relative;
  padding:20px 24px;
}
.copy-btn{
  position:absolute;top:16px;right:20px;
  display:flex;align-items:center;gap:6px;
  padding:6px 12px;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-xs);
  color:var(--text3);font-family:var(--font);
  font-size:0.75rem;font-weight:500;
  cursor:pointer;transition:all 0.2s;
}
.copy-btn:hover{background:var(--surface-hover);color:var(--text2)}
.code-pane pre{
  margin:0;
  overflow-x:auto;
  font-size:0.8125rem;
  line-height:1.7;
}
.code-pane code{
  font-family:var(--mono);
  color:var(--text2);
}

/* Footer */
.footer{
  border-top:1px solid var(--border);
  padding:32px 24px;
  margin-top:40px;
}
.footer-inner{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:16px;
}
.footer-inner p{color:var(--text3);font-size:0.85rem}
.footer-links button{
  background:none;border:none;
  color:var(--text2);font-family:var(--font);
  font-size:0.85rem;cursor:pointer;
  transition:color 0.2s;
}
.footer-links button:hover{color:var(--text)}

/* Spinner */
.spin{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* Loading dots for messages */
.typing-dots{display:flex;gap:4px;padding:4px 0}
.typing-dots span{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--text3);
  animation:dotBounce 1.4s ease-in-out infinite;
}
.typing-dots span:nth-child(2){animation-delay:0.2s}
.typing-dots span:nth-child(3){animation-delay:0.4s}
@keyframes dotBounce{
  0%,80%,100%{transform:scale(0.6);opacity:0.4}
  40%{transform:scale(1);opacity:1}
}

/* Responsive */
@media(max-width:768px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .nav-links.open{
    display:flex;flex-direction:column;
    position:absolute;top:64px;left:0;right:0;
    background:rgba(6,6,14,0.95);
    backdrop-filter:blur(20px);
    padding:16px 24px;
    gap:16px;
    border-bottom:1px solid var(--border);
  }
  .steps-grid{grid-template-columns:1fr}
  .section{padding:64px 20px}
  .config-card{padding:24px}
  .hide-mobile{display:none}
  .hero-content h1{font-size:clamp(2.5rem,12vw,4rem)}
  .chat-header{flex-direction:column;align-items:stretch}
  .chat-model-select select{width:100%}
  .chat-messages{height:280px}
  .code-pane{padding:16px}
  .code-tabs{overflow-x:auto}
  .endpoint-display{flex-direction:column;align-items:stretch}
}