/* QueUsan · theme — Tech Intelligence */

/* =============== TECH INTELLIGENCE — VARIANT A =============== */
:root[data-theme="dark"]{
  --bg:#0a0e17; --surface:#111826; --surface-2:#0d1320; --border:#1f2937;
  --border-soft:#172033; --text:#e5e7eb; --text-dim:#94a3b8; --text-muted:#64748b;
  --accent:#00ff88; --accent-2:#00d4ff; --error:#ef4444; --warning:#f59e0b;
  --accent-glow:rgba(0,255,136,0.15); --grid:rgba(255,255,255,0.03);
}
:root[data-theme="light"]{
  --bg:#f7f8fa; --surface:#ffffff; --surface-2:#f1f3f5; --border:#e5e7eb;
  --border-soft:#eef0f3; --text:#0a0e17; --text-dim:#475569; --text-muted:#94a3b8;
  --accent:#00a86b; --accent-2:#0891b2; --error:#dc2626; --warning:#d97706;
  --accent-glow:rgba(0,168,107,0.12); --grid:rgba(0,0,0,0.03);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--bg);color:var(--text);font-family:'Inter',system-ui,sans-serif;-webkit-font-smoothing:antialiased;font-size:14px;line-height:1.5}
body{min-height:100vh;overflow-x:hidden}
.mono{font-family:'JetBrains Mono',monospace}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
.feather{width:16px;height:16px;stroke-width:1.5;vertical-align:middle}
.feather-sm{width:14px;height:14px}
.feather-lg{width:20px;height:20px}

/* Bg grid */
body::before{content:'';position:fixed;inset:0;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px;pointer-events:none;z-index:0;mask-image:radial-gradient(ellipse at top,black 20%,transparent 70%)}

/* Header */
.header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{max-width:1280px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.logo{display:flex;align-items:center;gap:8px;font-weight:600;font-size:15px;letter-spacing:-0.01em}
.logo-mark{display:none}
.logo-img{height:30px;width:auto;display:block}
.header .logo-img,.mobile-menu .logo-img{height:42px}
.logo-img-dark{display:none}
[data-theme="dark"] .logo-img-light{display:none}
[data-theme="dark"] .logo-img-dark{display:block}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0.3}}
.nav{display:flex;gap:4px;margin-left:24px;flex:1}
.nav a{padding:7px 12px;border-radius:4px;color:var(--text-dim);font-size:13.5px;transition:all .15s}
.nav a:hover{color:var(--text);background:var(--surface)}
.header-right{display:flex;align-items:center;gap:8px}
.icon-btn{width:34px;height:34px;border-radius:4px;display:flex;align-items:center;justify-content:center;color:var(--text-dim);transition:all .15s}
.icon-btn:hover{background:var(--surface);color:var(--text)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:4px;font-size:13px;font-weight:500;transition:all .15s;border:1px solid transparent;white-space:nowrap}
.btn-ghost{color:var(--text-dim);border-color:var(--border)}
.btn-ghost:hover{color:var(--text);border-color:var(--text-muted)}
.btn-primary{background:var(--accent);color:#001a10;font-weight:600}
.btn-primary:hover{filter:brightness(1.1);box-shadow:0 0 0 3px var(--accent-glow)}
.btn-lg{padding:12px 20px;font-size:14px}
.hamburger{display:none}

/* Hero */
.section{position:relative;z-index:1}
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.hero{padding:80px 0 60px;text-align:center;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.14em;color:var(--accent);padding:5px 10px;border:1px solid var(--accent);border-radius:4px;background:var(--accent-glow);margin-bottom:24px}
.eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);animation:pulse 1.8s infinite}
@keyframes pulse{50%{opacity:0.4}}
h1.hero-title{font-family:'JetBrains Mono',monospace;font-size:clamp(32px,6vw,64px);line-height:1.05;letter-spacing:-0.03em;font-weight:600;max-width:900px;margin:0 auto 20px;text-wrap:balance}
h1.hero-title .accent{color:var(--accent)}
.hero-sub{max-width:640px;margin:0 auto 40px;font-size:16px;color:var(--text-dim);text-wrap:pretty}

/* Scan input */
.scan-input-wrap{max-width:640px;margin:0 auto;position:relative}
.scan-input{display:flex;align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:6px;transition:all .2s;font-family:'JetBrains Mono',monospace;position:relative;overflow:hidden}
.scan-input:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.scan-input .prompt{color:var(--accent);padding:0 12px;font-size:14px;user-select:none}
.scan-input input{flex:1;background:transparent;border:none;outline:none;color:var(--text);font:inherit;font-size:15px;padding:10px 0;min-width:0}
.scan-input input::placeholder{color:var(--text-muted)}
.scan-input .btn{margin-left:8px}
.scan-input .cursor{position:absolute;width:8px;height:18px;background:var(--accent);opacity:0;pointer-events:none}
.hero-note{margin-top:14px;font-size:12.5px;color:var(--text-muted);font-family:'JetBrains Mono',monospace}
.hero-note span{color:var(--accent)}

.trust-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:40px}
.badge{display:inline-flex;align-items:center;gap:6px;font-family:'JetBrains Mono',monospace;font-size:11.5px;color:var(--text-dim);padding:5px 10px;border:1px solid var(--border-soft);border-radius:4px;background:var(--surface-2)}
.badge .feather{color:var(--accent);width:12px;height:12px}

/* Demo terminal */
.demo{padding:60px 0}
.kicker{font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:0.18em;color:var(--accent);margin-bottom:12px;text-transform:uppercase}
.section-title{font-family:'JetBrains Mono',monospace;font-size:clamp(24px,3.5vw,36px);letter-spacing:-0.02em;font-weight:600;margin-bottom:12px;text-wrap:balance}
.section-sub{color:var(--text-dim);font-size:15px;max-width:560px;margin-bottom:40px}
.center{text-align:center}
.center .section-sub{margin-left:auto;margin-right:auto}

.terminal{background:var(--surface);border:1px solid var(--border);border-radius:6px;overflow:hidden;max-width:1040px;margin:0 auto;box-shadow:0 10px 40px rgba(0,0,0,0.3)}
:root[data-theme="light"] .terminal{box-shadow:0 10px 40px rgba(0,0,0,0.06)}
.terminal-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--surface-2)}
.term-dots{display:flex;gap:6px}
.term-dots span{width:10px;height:10px;border-radius:50%;background:var(--border)}
.term-dots span:nth-child(1){background:#ef4444}.term-dots span:nth-child(2){background:#f59e0b}.term-dots span:nth-child(3){background:#00ff88}
.term-path{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--text-dim);flex:1;text-align:center}
.term-tag{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--accent);padding:2px 6px;border:1px solid var(--accent);border-radius:3px}
.terminal-body{padding:20px;font-family:'JetBrains Mono',monospace;font-size:13px;line-height:1.7;min-height:420px;display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:900px){.terminal-body{grid-template-columns:280px 1fr}}
.term-log{color:var(--text-dim)}
.term-log .line{opacity:0;transform:translateX(-4px);animation:termLine .4s forwards}
.term-log .line:nth-child(1){animation-delay:.1s}
.term-log .line:nth-child(2){animation-delay:.4s}
.term-log .line:nth-child(3){animation-delay:.8s}
.term-log .line:nth-child(4){animation-delay:1.3s}
.term-log .line:nth-child(5){animation-delay:1.9s}
.term-log .line:nth-child(6){animation-delay:2.5s}
.term-log .line:nth-child(7){animation-delay:3.1s}
.term-log .line:nth-child(8){animation-delay:3.7s}
@keyframes termLine{to{opacity:1;transform:translateX(0)}}
.term-log .ok{color:var(--accent)}
.term-log .warn{color:var(--warning)}
.term-log .info{color:var(--accent-2)}
.term-cards{display:flex;flex-direction:column;gap:10px}
.term-card{border:1px solid var(--border);border-radius:4px;padding:12px 14px;background:var(--surface-2);opacity:0;transform:translateY(6px);animation:cardIn .5s forwards}
.term-card:nth-of-type(1){animation-delay:1s}
.term-card:nth-of-type(2){animation-delay:1.8s}
.term-card:nth-of-type(3){animation-delay:2.6s}
.term-card:nth-of-type(4){animation-delay:3.4s}
@keyframes cardIn{to{opacity:1;transform:translateY(0)}}
.card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.card-label{font-size:10.5px;letter-spacing:0.12em;color:var(--text-muted);text-transform:uppercase}
.card-conf{font-size:11px;color:var(--accent)}
.card-main{display:flex;align-items:center;gap:10px;color:var(--text);font-size:14px}
.card-main .tech-logo{width:22px;height:22px;border-radius:3px;background:var(--bg);border:1px solid var(--border-soft);display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--accent);font-weight:700}
.card-meta{display:flex;gap:10px;margin-top:8px;font-size:11.5px;color:var(--text-dim);flex-wrap:wrap}
.card-meta b{color:var(--text)}
.card-meta .pill{padding:1px 6px;border:1px solid var(--border-soft);border-radius:3px;font-size:10.5px}
.card-meta .pro{color:var(--warning);border-color:var(--warning)}
.card-meta .free{color:var(--accent);border-color:var(--accent)}

/* Features grid */
.features{padding:80px 0}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:6px;overflow:hidden}
@media(max-width:860px){.feat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.feat-grid{grid-template-columns:1fr}}
.feat{padding:28px;background:var(--surface);transition:background .2s;position:relative}
.feat:hover{background:var(--surface-2)}
.feat-icon{width:36px;height:36px;border-radius:4px;background:var(--accent-glow);border:1px solid var(--accent);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feat-icon .feather{width:18px;height:18px}
.feat-title{font-family:'JetBrains Mono',monospace;font-size:14px;font-weight:600;margin-bottom:8px;letter-spacing:-0.01em}
.feat-desc{font-size:13.5px;color:var(--text-dim);line-height:1.55}
.feat-num{position:absolute;top:16px;right:18px;font-family:'JetBrains Mono',monospace;font-size:10.5px;color:var(--text-muted)}

/* Use cases */
.usecases{padding:60px 0 80px}
.uc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:16px}
.uc{border:1px solid var(--border);border-radius:6px;padding:28px;background:var(--surface);display:flex;flex-direction:column;gap:14px;transition:all .2s}
.uc:hover{border-color:var(--text-muted)}
.uc-head{display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px dashed var(--border)}
.uc-head .feather{color:var(--accent)}
.uc-head h3{font-family:'JetBrains Mono',monospace;font-size:14px;font-weight:600;letter-spacing:-0.01em}
.uc p{color:var(--text-dim);font-size:13.5px;line-height:1.6}
.uc blockquote{border-left:2px solid var(--accent);padding:8px 0 8px 14px;font-style:italic;font-size:13px;color:var(--text)}
.uc cite{display:block;font-style:normal;color:var(--text-muted);font-size:12px;margin-top:6px;font-family:'JetBrains Mono',monospace}

/* Logos carousel */
.logos-strip{padding:50px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);overflow:hidden;background:var(--surface-2)}
.logos-label{text-align:center;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.16em;color:var(--text-muted);margin-bottom:24px;text-transform:uppercase}
.logos-track{display:flex;gap:48px;animation:scrollLogos 40s linear infinite;width:max-content}
.logos-track .tech-chip{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border:1px solid var(--border);border-radius:4px;background:var(--surface);font-family:'JetBrains Mono',monospace;font-size:12.5px;color:var(--text-dim);white-space:nowrap}
.logos-track .tech-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}
@keyframes scrollLogos{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* Pricing */
.pricing{padding:80px 0}
.price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;max-width:1100px;margin:40px auto 0}
.plan{border:1px solid var(--border);border-radius:6px;padding:28px;background:var(--surface);display:flex;flex-direction:column;gap:16px;position:relative}
.plan.popular{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent),0 8px 32px var(--accent-glow)}
.plan-badge{position:absolute;top:-10px;left:24px;font-family:'JetBrains Mono',monospace;font-size:10.5px;letter-spacing:0.1em;background:var(--accent);color:#001a10;padding:3px 8px;border-radius:3px;font-weight:600;text-transform:uppercase}
.plan-name{font-family:'JetBrains Mono',monospace;font-size:13px;letter-spacing:0.08em;color:var(--text-dim);text-transform:uppercase}
.plan-price{display:flex;align-items:baseline;gap:6px;font-family:'JetBrains Mono',monospace}
.plan-price .amt{font-size:36px;font-weight:600;letter-spacing:-0.02em}
.plan-price .per{color:var(--text-muted);font-size:13px}
.plan-pitch{color:var(--text-dim);font-size:13.5px;line-height:1.5}
.plan ul{list-style:none;display:flex;flex-direction:column;gap:9px;font-size:13.5px;margin:4px 0}
.plan li{display:flex;align-items:flex-start;gap:9px;color:var(--text)}
.plan li .feather{color:var(--accent);flex-shrink:0;margin-top:2px;width:14px;height:14px}
.plan-note{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-muted);margin-top:-4px}

/* FAQ */
.faq{padding:60px 0 80px;max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:first-child{border-top:1px solid var(--border)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 0;font-size:15px;text-align:left;font-family:'JetBrains Mono',monospace;font-weight:500;letter-spacing:-0.005em;gap:16px}
.faq-q .feather{color:var(--text-muted);transition:transform .25s;flex-shrink:0}
.faq-item[open] .faq-q .feather{transform:rotate(45deg);color:var(--accent)}
.faq-a{padding:0 0 22px;color:var(--text-dim);line-height:1.7;font-size:14px;max-width:720px}

/* CTA final */
.cta-final{padding:80px 0;text-align:center;border-top:1px solid var(--border);background:var(--surface-2)}

/* Footer */
footer{border-top:1px solid var(--border);padding:48px 0 28px;background:var(--surface-2);margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.3fr repeat(4,1fr);gap:32px}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr;gap:28px}}
.foot-brand p{color:var(--text-dim);font-size:13px;margin-top:12px;max-width:260px;line-height:1.6}
.foot-col h4{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:0.14em;color:var(--text-muted);text-transform:uppercase;margin-bottom:14px}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.foot-col a{color:var(--text-dim);font-size:13px;transition:color .15s}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{margin-top:40px;padding-top:20px;border-top:1px dashed var(--border);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-family:'JetBrains Mono',monospace;font-size:11.5px;color:var(--text-muted)}

/* Chatbot */
.chat-bubble{position:fixed;bottom:24px;right:24px;width:56px;height:56px;border-radius:50%;background:var(--accent);color:#001a10;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px var(--accent-glow),0 4px 12px rgba(0,0,0,0.2);z-index:40;transition:all .2s;border:none;cursor:pointer}
.chat-bubble:hover{transform:scale(1.05)}
.chat-bubble::after{content:'';position:absolute;inset:-4px;border-radius:50%;border:1px solid var(--accent);animation:chatPulse 2.2s infinite;pointer-events:none}
@keyframes chatPulse{0%{opacity:1;transform:scale(1)}100%{opacity:0;transform:scale(1.3)}}
.chat-bubble .feather{width:24px;height:24px;stroke-width:2}
.chat-badge{position:absolute;top:-4px;right:-4px;min-width:18px;height:18px;border-radius:9px;background:var(--error);color:#fff;font-size:10px;font-weight:600;display:flex;align-items:center;justify-content:center;padding:0 5px;font-family:'JetBrains Mono',monospace}

.chat-panel{position:fixed;bottom:92px;right:24px;width:380px;height:560px;max-height:calc(100vh - 120px);background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,0.4);display:flex;flex-direction:column;z-index:41;transform-origin:bottom right;animation:chatOpen .22s cubic-bezier(.2,.8,.3,1)}
@keyframes chatOpen{from{opacity:0;transform:scale(.96) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}
.chat-head{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px}
.chat-avatar{width:36px;height:36px;border-radius:4px;background:var(--accent-glow);border:1px solid var(--accent);color:var(--accent);display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono',monospace;font-weight:700;font-size:14px;flex-shrink:0}
.chat-info{flex:1;min-width:0}
.chat-info h4{font-size:13.5px;font-weight:600;margin-bottom:2px}
.chat-info .status{font-size:11.5px;color:var(--accent);font-family:'JetBrains Mono',monospace;display:flex;align-items:center;gap:5px}
.chat-info .status::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent)}
.chat-close{color:var(--text-dim);padding:6px;border-radius:4px;transition:all .15s}
.chat-close:hover{background:var(--surface-2);color:var(--text)}
.chat-body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;scroll-behavior:smooth}
.chat-body::-webkit-scrollbar{width:6px}.chat-body::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
.msg{max-width:85%;padding:10px 12px;border-radius:8px;font-size:13.5px;line-height:1.5;animation:msgIn .25s}
@keyframes msgIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
.msg.bot{background:var(--surface-2);border:1px solid var(--border-soft);border-top-left-radius:3px;align-self:flex-start;color:var(--text)}
.msg.user{background:var(--accent);color:#001a10;border-top-right-radius:3px;align-self:flex-end;font-weight:500}
.chat-suggest{display:flex;flex-direction:column;gap:6px;margin-top:6px;align-self:flex-start;max-width:95%}
.chat-suggest button{text-align:left;padding:8px 12px;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:4px;font-size:12.5px;font-family:'JetBrains Mono',monospace;transition:all .15s}
.chat-suggest button:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-glow)}
.typing{display:inline-flex;gap:3px;padding:12px}
.typing span{width:6px;height:6px;border-radius:50%;background:var(--text-muted);animation:bounce 1.2s infinite}
.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,60%,100%{transform:translateY(0);opacity:0.5}30%{transform:translateY(-4px);opacity:1}}
.chat-input{padding:12px;border-top:1px solid var(--border);display:flex;gap:8px;background:var(--surface-2)}
.chat-input input{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:8px 10px;color:var(--text);font:inherit;font-size:13px;outline:none;transition:all .15s}
.chat-input input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-glow)}
.chat-send{width:34px;height:34px;border-radius:4px;background:var(--accent);color:#001a10;display:flex;align-items:center;justify-content:center;transition:all .15s}
.chat-send:hover{filter:brightness(1.1)}
.chat-send .feather{stroke-width:2}

@media(max-width:768px){
  .nav{display:none}
  .header-right .btn-ghost{display:none}
  .hamburger{display:flex}
  .hero{padding:48px 0 40px}
  .features,.pricing,.usecases,.cta-final{padding:56px 0}
  .demo{padding:40px 0}
  .scan-input input{font-size:14px}
  .scan-input .prompt{padding:0 8px;font-size:13px}
  .scan-input .btn{padding:8px 10px;font-size:12px}
  .chat-panel{bottom:80px;right:12px;left:12px;width:auto}
  .chat-bubble{bottom:16px;right:16px}
  .term-log{font-size:11.5px}
  .foot-bottom{flex-direction:column}
}
.mobile-menu{position:fixed;inset:0;background:var(--bg);z-index:60;display:none;flex-direction:column;animation:slideIn .3s cubic-bezier(.2,.7,.3,1)}
.mobile-menu.open{display:flex}
@keyframes slideIn{from{transform:translateX(100%)}to{transform:translateX(0)}}
.mobile-menu-head{padding:14px 24px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border)}
.mobile-menu-nav{flex:1;padding:32px 24px;display:flex;flex-direction:column;gap:4px}
.mobile-menu-nav a{padding:16px 0;font-family:'JetBrains Mono',monospace;font-size:20px;color:var(--text);border-bottom:1px solid var(--border-soft);display:flex;align-items:center;justify-content:space-between}
.mobile-menu-nav a:hover{color:var(--accent)}
.mobile-menu-foot{padding:24px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:10px}