/* ---------- tokens ---------- */
:root{
  --bg:#08090b;
  --bg-elevated:#0e1013;
  --surface:#14171c;
  --surface-2:#191d23;
  --border:rgba(255,255,255,0.08);
  --border-strong:rgba(255,255,255,0.14);
  --text-primary:#f2f4f7;
  --text-secondary:#a7adb8;
  --text-tertiary:#6d7480;
  --accent:#35e0c1;
  --accent-dim:rgba(53,224,193,0.14);
  --accent-text:#08090b;
  --radius-card:16px;
  --radius-input:10px;
  --radius-pill:999px;
  --font-display:"Space Grotesk",sans-serif;
  --font-body:"Manrope",sans-serif;
  --font-mono:"IBM Plex Mono",monospace;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --max:1280px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
.icon{width:1em;height:1em;display:inline-block;flex:none;vertical-align:-0.125em;fill:currentColor}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text-primary);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font:inherit;cursor:pointer}
input,textarea{font:inherit;color:inherit}

.section-inner{max-width:var(--max);margin:0 auto;padding:0 20px}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important}
}

/* subtle grain overlay, fixed, non-scrolling */
#grain{
  position:fixed;inset:0;z-index:60;pointer-events:none;
  opacity:0.035;mix-blend-mode:overlay;
}

/* futuristic fixed grid backdrop */
.bg-grid{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size:64px 64px;
  opacity:0.16;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent 75%);
}

/* futuristic drifting glow blobs, fixed, behind all content */
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.aurora::before,.aurora::after{
  content:"";position:absolute;border-radius:50%;filter:blur(100px);
}
.aurora::before{
  width:560px;height:560px;background:var(--accent);opacity:0.16;
  top:-160px;left:-120px;
  animation:aurora-drift-1 24s ease-in-out infinite alternate;
}
.aurora::after{
  width:460px;height:460px;background:#ffffff;opacity:0.05;
  bottom:-160px;right:-100px;
  animation:aurora-drift-2 28s ease-in-out infinite alternate;
}
@keyframes aurora-drift-1{from{transform:translate(0,0) scale(1)}to{transform:translate(90px,70px) scale(1.12)}}
@keyframes aurora-drift-2{from{transform:translate(0,0) scale(1)}to{transform:translate(-70px,-60px) scale(1.08)}}
@media (prefers-reduced-motion: reduce){
  .aurora::before,.aurora::after{animation:none}
}

/* ---------- eyebrow tag ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:0.1em;color:var(--accent);
  padding:6px 12px;border-radius:var(--radius-pill);
  background:var(--accent-dim);border:1px solid rgba(53,224,193,0.25);
  margin-bottom:18px;
}
.eyebrow i{font-size:14px}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(8,9,11,0.7);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:var(--max);margin:0 auto;padding:0 20px;
  height:64px;display:flex;align-items:center;justify-content:space-between;
  gap:24px;
}
.brand{display:flex;align-items:center;gap:8px}
.brand-mark{
  flex:none;width:30px;height:30px;border-radius:50%;
  background-image:url('logo_stfs.jpg');
  background-size:138% 138%;
  background-position:53% 6%;
  border:1.5px solid rgba(53,224,193,0.45);
  box-shadow:0 0 12px rgba(53,224,193,0.35);
}
.brand-word{
  font-family:var(--font-display);font-weight:700;font-size:19px;
  letter-spacing:0.02em;
}
.nav-links{display:none;gap:32px;align-items:center}
.nav-links a{
  font-size:14.5px;color:var(--text-secondary);
  transition:color 0.25s var(--ease);
}
.nav-links a:hover{color:var(--text-primary)}
.nav-inner .btn-nav{display:none}
.nav-toggle{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:36px;height:36px;background:none;border:none;padding:8px;
}
.nav-toggle span{
  display:block;width:100%;height:1.5px;background:var(--text-primary);
  transition:transform 0.3s var(--ease),opacity 0.3s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

.nav-mobile{
  display:flex;flex-direction:column;gap:2px;
  max-height:0;overflow:hidden;
  background:var(--bg-elevated);
  border-bottom:1px solid var(--border);
  transition:max-height 0.35s var(--ease);
}
.nav-mobile.open{max-height:340px}
.nav-mobile a{
  padding:16px 20px;font-size:15px;color:var(--text-secondary);
  border-top:1px solid var(--border);
}
.nav-mobile .btn{margin:16px 20px 20px}

@media (min-width:1024px){
  .nav-links{display:flex}
  .nav-inner .btn-nav{display:inline-flex}
  .nav-toggle{display:none}
  .nav-mobile{display:none !important}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 24px;border-radius:var(--radius-pill);
  font-weight:600;font-size:14.5px;white-space:nowrap;
  border:1px solid transparent;
  transition:transform 0.2s var(--ease),background 0.25s var(--ease),border-color 0.25s var(--ease);
}
.btn:active{transform:scale(0.97)}
.btn-primary{background:var(--accent);color:var(--accent-text)}
.btn-primary:hover{background:#4fe9cd}
.btn-ghost{background:transparent;color:var(--text-primary);border-color:var(--border-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-lg{padding:15px 30px;font-size:15.5px}
.btn-block{width:100%}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:100dvh;
  display:flex;align-items:center;
  padding:120px 20px 80px;
  overflow:hidden;
}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;opacity:0.55}
.hero-inner{
  position:relative;z-index:1;max-width:var(--max);margin:0 auto;width:100%;
  display:flex;flex-direction:column;gap:24px;max-width:860px;
}
.hero-title{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(34px,7vw,58px);
  line-height:1.08;letter-spacing:-0.01em;
}
.hero-sub{
  font-size:17px;line-height:1.6;color:var(--text-secondary);
  max-width:52ch;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-status{
  display:inline-flex;align-items:center;gap:10px;margin-top:8px;
  font-family:var(--font-mono);font-size:12.5px;color:var(--text-tertiary);
  letter-spacing:0.02em;
}
.status-dot{
  width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 0 rgba(53,224,193,0.5);
  animation:pulse-dot 2s infinite;
}
@keyframes pulse-dot{
  0%{box-shadow:0 0 0 0 rgba(53,224,193,0.45)}
  70%{box-shadow:0 0 0 8px rgba(53,224,193,0)}
  100%{box-shadow:0 0 0 0 rgba(53,224,193,0)}
}

/* ---------- hero demo (AI terminal) ---------- */
.hero-grid{display:flex;flex-direction:column;gap:56px;max-width:none}
.hero-copy{max-width:640px}
.hero-demo{position:relative;width:100%}

.terminal{
  background:rgba(20,23,28,0.6);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid var(--border-strong);border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:0 30px 80px -30px rgba(0,0,0,0.6),0 0 0 1px rgba(53,224,193,0.05);
}
.terminal-head{
  display:flex;align-items:center;gap:8px;
  padding:14px 16px;border-bottom:1px solid var(--border);
  background:rgba(255,255,255,0.02);
}
.term-dot{width:9px;height:9px;border-radius:50%}
.term-dot-r{background:#ff5f57}
.term-dot-y{background:#febc2e}
.term-dot-g{background:#28c840}
.terminal-title{
  margin-left:8px;font-family:var(--font-mono);font-size:12px;color:var(--text-tertiary);
  display:flex;align-items:center;gap:6px;
}
.terminal-title svg{color:var(--accent)}
.terminal-body{
  padding:22px 20px;height:260px;overflow-y:auto;
  display:flex;flex-direction:column;gap:14px;
  font-family:var(--font-mono);font-size:13.5px;line-height:1.6;
}
.term-line{
  max-width:88%;padding:10px 14px;border-radius:10px;
  white-space:pre-wrap;word-break:break-word;
}
.term-line.ai{
  align-self:flex-start;background:var(--accent-dim);color:var(--text-primary);
  border:1px solid rgba(53,224,193,0.2);
}
.term-line.user{
  align-self:flex-end;background:rgba(255,255,255,0.05);color:var(--text-secondary);
  border:1px solid var(--border);
}
.term-cursor{display:inline-block;width:7px;height:14px;background:var(--accent);margin-left:2px;vertical-align:middle;animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}

.floating-badge{
  position:absolute;display:flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:var(--radius-pill);
  background:rgba(20,23,28,0.75);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--border-strong);
  font-size:12.5px;font-weight:600;color:var(--text-primary);
  box-shadow:0 16px 40px -18px rgba(0,0,0,0.7);
  animation:float-badge 5s ease-in-out infinite;
}
.floating-badge svg{color:var(--accent);font-size:15px}
.floating-badge-1{top:-16px;right:20px;animation-delay:0s}
@keyframes float-badge{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@media (prefers-reduced-motion: reduce){
  .floating-badge{animation:none}
}

@media (max-width:639px){
  .floating-badge{position:static;margin-top:12px;width:fit-content}
}

@media (min-width:1024px){
  .hero{padding-top:150px}
  .hero-grid{flex-direction:row;align-items:center;gap:64px}
  .hero-copy{flex:1.05}
  .hero-demo{flex:1}
}

/* ---------- section divider ---------- */
.section-divider{
  height:1px;max-width:var(--max);margin:0 auto;
  background:linear-gradient(90deg,transparent,var(--border-strong) 50%,transparent);
}

/* ---------- about ---------- */
.about{position:relative}
.about-inner{
  display:flex;flex-direction:column;gap:48px;
}
.about-text{color:var(--text-secondary);font-size:15.5px;line-height:1.7;max-width:56ch;margin-bottom:16px}

.about-visual{display:flex;align-items:center;justify-content:center;min-height:280px}
.ai-core{
  position:relative;width:220px;height:220px;
  display:flex;align-items:center;justify-content:center;
}
.ai-ring{
  position:absolute;border:1px solid var(--border-strong);border-radius:50%;
}
.ai-ring-1{inset:0;animation:spin 18s linear infinite}
.ai-ring-2{inset:28px;border-color:rgba(53,224,193,0.25);animation:spin 14s linear infinite reverse}
.ai-ring-3{inset:56px;border-style:dashed;animation:spin 24s linear infinite}
.ai-core-logo{
  width:72px;height:72px;border-radius:50%;
  background-image:url('logo_stfs.jpg');
  background-size:138% 138%;
  background-position:53% 6%;
  border:2px solid rgba(53,224,193,0.5);
  box-shadow:0 0 30px 6px rgba(53,224,193,0.45);
}
.ai-tag{
  position:absolute;font-family:var(--font-mono);font-size:11px;color:var(--text-tertiary);
  padding:4px 9px;border:1px solid var(--border);border-radius:var(--radius-pill);
  background:var(--bg-elevated);white-space:nowrap;
}
.ai-tag-1{top:6px;left:50%;transform:translateX(-50%)}
.ai-tag-2{bottom:26px;left:-6px}
.ai-tag-3{bottom:26px;right:-16px}
@keyframes spin{to{transform:rotate(360deg)}}

@media (min-width:900px){
  .about-inner{flex-direction:row;align-items:center;gap:64px}
  .about-copy{flex:1.2}
  .about-visual{flex:1;min-height:340px}
  .ai-core{width:280px;height:280px}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity 0.7s var(--ease),transform 0.7s var(--ease)}
.reveal.in{opacity:1;transform:translateY(0)}

/* ---------- section title ---------- */
.section-title{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(26px,4vw,38px);
  letter-spacing:-0.01em;
  margin-bottom:40px;
  max-width:22ch;
}

section{padding:88px 0}
@media (min-width:768px){section{padding:120px 0}}

/* ---------- services ---------- */
.services-grid{display:grid;grid-template-columns:1fr;gap:20px}
.service-card{
  position:relative;z-index:1;
  background:rgba(20,23,28,0.55);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:32px 28px;
  display:flex;flex-direction:column;gap:16px;
  transition:border-color 0.3s var(--ease),transform 0.3s var(--ease),box-shadow 0.3s var(--ease);
}
.service-card:hover{
  border-color:rgba(53,224,193,0.35);
  transform:translateY(-3px);
  box-shadow:0 16px 40px -20px rgba(53,224,193,0.25);
}
.service-icon{
  width:44px;height:44px;border-radius:12px;
  background:var(--accent-dim);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:22px;
  box-shadow:0 0 0 1px rgba(53,224,193,0.15),0 0 24px -4px rgba(53,224,193,0.4);
}
.service-card h3{font-family:var(--font-display);font-size:21px;font-weight:600}
.service-card p{color:var(--text-secondary);font-size:15px;line-height:1.6}
.service-list{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.service-list li{
  font-size:14.5px;color:var(--text-secondary);
  padding-left:18px;position:relative;
}
.service-list li::before{
  content:"";position:absolute;left:0;top:8px;
  width:6px;height:6px;border-radius:2px;background:var(--accent);
}
@media (min-width:900px){
  .services-grid{grid-template-columns:1.4fr 1fr}
  .service-card--lg{padding:40px 36px}
  .services-grid--6{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1200px){
  .services-grid--6{grid-template-columns:repeat(3,1fr)}
  .services-grid--6 .service-card{padding:36px 32px}
}

/* ---------- workflow (interactive demo) ---------- */
.flow{
  display:flex;flex-direction:column;align-items:center;gap:0;
  max-width:920px;margin:0 auto;
}
.flow-node{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  padding:18px 14px;border-radius:16px;
  color:var(--text-tertiary);
  transition:color 0.4s var(--ease);
  width:100%;
}
.flow-node i{
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:24px;
  background:var(--surface);border:1px solid var(--border-strong);
  transition:background 0.4s var(--ease),border-color 0.4s var(--ease),
    box-shadow 0.4s var(--ease),color 0.4s var(--ease),transform 0.4s var(--ease);
}
.flow-node span{font-size:13px;font-weight:600;text-align:center}
.flow-node.active{color:var(--text-primary)}
.flow-node.active i{
  background:var(--accent);border-color:var(--accent);color:var(--accent-text);
  box-shadow:0 0 0 8px rgba(53,224,193,0.12),0 0 30px -4px rgba(53,224,193,0.6);
  transform:scale(1.06);
}
.flow-line{
  width:2px;height:28px;background:var(--border);position:relative;overflow:hidden;
}
.flow-line::after{
  content:"";position:absolute;inset:0;background:var(--accent);
  transform:scaleY(0);transform-origin:top;transition:transform 0.5s var(--ease);
}
.flow-line.filled::after{transform:scaleY(1)}
.flow-caption{
  text-align:center;margin-top:28px;color:var(--text-secondary);
  font-size:14.5px;min-height:1.4em;
}

@media (min-width:900px){
  .flow{flex-direction:row;align-items:flex-start}
  .flow-node{width:auto;flex:1}
  .flow-line{width:auto;height:2px;flex:0 0 48px;margin-top:28px}
}

/* ---------- process ---------- */
.process-line{
  display:flex;flex-direction:column;gap:32px;
  position:relative;
}
.process-step{position:relative;padding-left:56px}
.process-node{
  position:absolute;left:0;top:0;
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--border-strong);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);font-size:12.5px;color:var(--accent);
}
.process-step h3{font-family:var(--font-display);font-size:18px;font-weight:600;margin-bottom:6px}
.process-step p{color:var(--text-secondary);font-size:14.5px;line-height:1.6;max-width:42ch}

@media (min-width:900px){
  .process-line{flex-direction:row;gap:0}
  .process-line::before{
    content:"";position:absolute;top:20px;left:20px;right:20px;height:1px;
    background:var(--border);
  }
  .process-step{flex:1;padding-left:0;padding-top:64px;padding-right:24px}
  .process-node{left:0;top:0}
}

/* ---------- collab ---------- */
.collab-models{
  display:grid;grid-template-columns:1fr;gap:20px;
  margin-top:56px;
}
.collab-card{
  position:relative;z-index:1;
  background:rgba(20,23,28,0.55);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--border);
  border-radius:var(--radius-card);padding:28px 26px;
  display:flex;flex-direction:column;gap:10px;
  transition:transform 0.3s var(--ease),border-color 0.3s var(--ease);
}
.collab-card:hover{transform:translateY(-3px);border-color:rgba(53,224,193,0.3)}
.collab-card--accent{border-color:rgba(53,224,193,0.35);background:rgba(25,29,35,0.65)}
.collab-tag{
  font-family:var(--font-mono);font-size:11px;letter-spacing:0.06em;
  color:var(--accent);text-transform:uppercase;
}
.collab-card h3{font-family:var(--font-display);font-size:19px;font-weight:600}
.collab-card p{color:var(--text-secondary);font-size:14.5px;line-height:1.6}

@media (min-width:900px){
  .collab-models{grid-template-columns:repeat(3,1fr)}
}

/* ---------- cta glow (reused by booking section) ---------- */
.cta-glow{
  position:absolute;top:-30%;right:-10%;width:60%;height:140%;
  background:radial-gradient(closest-side,var(--accent-dim),transparent 70%);
  pointer-events:none;
}
.cta-email{color:var(--accent);font-weight:600;font-size:16px;border-bottom:1px solid transparent}
.cta-email:hover{border-color:var(--accent)}

/* ---------- booking (konsultacja) ---------- */
.booking{position:relative;overflow:hidden}
.booking-inner{
  position:relative;z-index:1;
  display:flex;flex-direction:column;gap:48px;
}
.booking-copy h2{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(28px,4.4vw,42px);letter-spacing:-0.01em;margin-bottom:14px;
  max-width:18ch;
}
.booking-copy p{color:var(--text-secondary);font-size:16px;max-width:46ch;margin-bottom:22px}
.booking-includes{display:flex;flex-direction:column;gap:12px;margin-bottom:26px}
.booking-includes li{
  display:flex;align-items:flex-start;gap:10px;
  color:var(--text-secondary);font-size:14.5px;line-height:1.5;
}
.booking-includes svg{color:var(--accent);font-size:18px;flex:none;margin-top:1px}

.booking-card{
  position:relative;z-index:1;
  background:rgba(20,23,28,0.6);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border:1px solid var(--border-strong);
  border-radius:var(--radius-card);padding:28px;
  display:flex;flex-direction:column;gap:22px;
  box-shadow:0 30px 80px -30px rgba(0,0,0,0.6);
}
.booking-card--cal{padding:12px;overflow:visible}
.cal-inline{width:100%;min-height:850px;overflow:visible}
@media (min-width:1024px){
  .cal-inline{min-height:900px}
}

@media (min-width:1024px){
  .booking-inner{flex-direction:row;justify-content:space-between;align-items:flex-start;gap:64px}
  .booking-copy{flex:1;padding-top:12px;position:sticky;top:120px}
  .booking-card{flex:0 0 440px}
}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--border);padding-top:64px}
.footer-inner{
  display:flex;flex-direction:column;gap:40px;padding-bottom:40px;
}
.footer-links{display:flex;gap:56px;flex-wrap:wrap}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-heading{font-size:13px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:0.08em;margin-bottom:4px}
.footer-col a{font-size:14.5px;color:var(--text-secondary);transition:color 0.2s var(--ease)}
.footer-col a:hover{color:var(--text-primary)}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;
  padding:24px 20px;border-top:1px solid var(--border);
  font-size:13px;color:var(--text-tertiary);
}
.footer-bottom a{color:var(--text-tertiary);transition:color 0.2s var(--ease)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- legal page content ---------- */
.legal{padding:160px 0 80px}
.legal-inner{max-width:760px}
.legal-updated{color:var(--text-tertiary);font-size:13.5px;margin-bottom:40px}
.legal-inner h2{
  font-family:var(--font-display);font-weight:600;font-size:22px;
  margin-top:44px;margin-bottom:14px;
}
.legal-inner h2:first-of-type{margin-top:0}
.legal-inner p{color:var(--text-secondary);font-size:15px;line-height:1.7;margin-bottom:14px}
.legal-inner ul{display:flex;flex-direction:column;gap:8px;margin:14px 0 14px 0}
.legal-inner li{
  color:var(--text-secondary);font-size:15px;line-height:1.6;
  padding-left:18px;position:relative;
}
.legal-inner li::before{
  content:"";position:absolute;left:0;top:9px;
  width:6px;height:6px;border-radius:2px;background:var(--accent);
}
.legal-inner a{color:var(--accent);border-bottom:1px solid transparent}
.legal-inner a:hover{border-color:var(--accent)}
.legal-inner strong{color:var(--text-primary);font-weight:600}

@media (min-width:768px){
  .footer-inner{flex-direction:row}
}

/* ---------- chat widget ---------- */
.chat-widget{position:fixed;right:20px;bottom:20px;z-index:70;display:flex;flex-direction:column;align-items:flex-end;gap:14px;pointer-events:none}
.chat-widget .chat-toggle,
.chat-widget .chat-panel.open{pointer-events:auto}

.chat-toggle{
  width:58px;height:58px;border-radius:50%;border:1px solid var(--border-strong);
  background:var(--accent);color:var(--accent-text);
  display:flex;align-items:center;justify-content:center;font-size:24px;
  box-shadow:0 16px 40px -12px rgba(53,224,193,0.55),0 0 0 1px rgba(53,224,193,0.15);
  transition:transform 0.25s var(--ease),box-shadow 0.25s var(--ease);
}
.chat-toggle:hover{transform:scale(1.06)}
.chat-toggle:active{transform:scale(0.96)}

.chat-panel{
  width:min(360px,calc(100vw - 40px));
  max-height:min(560px,calc(100vh - 120px));
  display:flex;flex-direction:column;
  background:rgba(20,23,28,0.75);
  backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);
  border:1px solid var(--border-strong);border-radius:var(--radius-card);
  box-shadow:0 30px 80px -24px rgba(0,0,0,0.65);
  overflow:hidden;
  opacity:0;transform:translateY(16px) scale(0.98);pointer-events:none;
  transition:opacity 0.25s var(--ease),transform 0.25s var(--ease);
}
.chat-panel.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}

.chat-head{
  display:flex;align-items:center;gap:10px;padding:16px;
  border-bottom:1px solid var(--border);background:rgba(255,255,255,0.02);
}
.chat-head-avatar{
  width:36px;height:36px;border-radius:50%;flex:none;
  background-image:url('logo_stfs.jpg');
  background-size:138% 138%;background-position:53% 6%;
  border:1.5px solid rgba(53,224,193,0.5);
  box-shadow:0 0 12px rgba(53,224,193,0.4);
}
.chat-head-text{display:flex;flex-direction:column;gap:2px;flex:1}
.chat-head-title{font-family:var(--font-display);font-weight:600;font-size:14.5px}
.chat-head-status{
  display:flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11px;color:var(--text-tertiary);
}
.chat-close{
  background:none;border:none;color:var(--text-tertiary);font-size:18px;
  padding:4px;flex:none;transition:color 0.2s var(--ease);
}
.chat-close:hover{color:var(--text-primary)}

.chat-body{
  flex:1;overflow-y:auto;padding:16px;
  display:flex;flex-direction:column;gap:12px;
  min-height:200px;
}
.chat-msg{
  max-width:86%;padding:10px 14px;border-radius:12px;
  font-size:13.5px;line-height:1.55;white-space:pre-wrap;word-break:break-word;
}
.chat-msg.ai{
  align-self:flex-start;background:var(--accent-dim);color:var(--text-primary);
  border:1px solid rgba(53,224,193,0.2);
}
.chat-msg.user{
  align-self:flex-end;background:rgba(255,255,255,0.06);color:var(--text-secondary);
  border:1px solid var(--border);
}
.chat-msg.pending{color:var(--text-tertiary);font-family:var(--font-mono);font-size:12.5px}

.chat-input-row{
  display:flex;gap:8px;padding:12px;border-top:1px solid var(--border);
}
.chat-input-row input{
  flex:1;background:var(--bg-elevated);border:1px solid var(--border-strong);
  border-radius:var(--radius-pill);padding:10px 16px;font-size:16px;color:var(--text-primary);
  transition:border-color 0.2s var(--ease);
}
.chat-input-row input::placeholder{color:var(--text-tertiary)}
.chat-input-row input:focus{outline:none;border-color:var(--accent)}
.chat-send{
  width:38px;height:38px;border-radius:50%;flex:none;
  background:var(--accent);color:var(--accent-text);border:none;
  display:flex;align-items:center;justify-content:center;font-size:16px;
  transition:transform 0.2s var(--ease);
}
.chat-send:hover{transform:scale(1.06)}
.chat-send:disabled{opacity:0.5;pointer-events:none}

@media (max-width:479px){
  .chat-widget{right:14px;bottom:14px;left:14px;align-items:stretch}
  .chat-panel{width:100%}
}