/* ============================================================
   The 8th FanRuan Smart Data Conference 2026
   Design system — premium dark AI / Data aesthetic
   ============================================================ */

:root{
  /* Color */
  --ink:        #050A1E;
  --ink-2:      #080F2A;
  --ink-3:      #0C1638;
  --blue:       #1D4EBB;
  --blue-bright:#2B6FFF;
  --cyan:       #46C2FF;
  --lime:       #C8FD04;
  --text:       #EAF0FF;
  --muted:      #93A0C4;
  --muted-2:    #6B789E;
  --glass:      rgba(255,255,255,.045);
  --glass-2:    rgba(255,255,255,.07);
  --border:     rgba(255,255,255,.10);
  --border-2:   rgba(255,255,255,.16);

  /* Type */
  --display: "Archivo", "Arial Narrow", sans-serif;
  --body:    "Inter", system-ui, sans-serif;

  /* Layout */
  --maxw: 1240px;
  --gut: clamp(20px, 5vw, 64px);
  --radius: 18px;
  --radius-lg: 26px;

  --ease: cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} *{animation:none!important;transition:none!important} }

body{
  font-family:var(--body);
  background:var(--ink);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  position:relative;
}

/* global grain / atmosphere */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 600px at 80% -10%, rgba(43,111,255,.16), transparent 60%),
    radial-gradient(800px 700px at -10% 30%, rgba(29,78,187,.18), transparent 60%),
    radial-gradient(700px 700px at 110% 90%, rgba(70,194,255,.08), transparent 60%);
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
::selection{background:var(--lime);color:#06210b}

.container{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut);position:relative;z-index:1}

/* ---------- Typography helpers ---------- */
.eyebrow{
  font-family:var(--display);
  font-weight:700;font-size:.78rem;letter-spacing:.32em;text-transform:uppercase;
  color:var(--lime);display:inline-flex;align-items:center;gap:.7em;
}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--lime);display:inline-block}

.h-display{
  font-family:var(--display);font-weight:800;line-height:.96;
  letter-spacing:-.01em;text-transform:uppercase;
}
.section-title{
  font-family:var(--display);font-weight:800;text-transform:uppercase;
  font-size:clamp(2rem,5vw,3.4rem);line-height:1.02;letter-spacing:-.01em;margin:.35em 0 .5em;
}
.section-intro{color:var(--muted);font-size:clamp(1rem,1.4vw,1.18rem);max-width:62ch}
.grad-lime{color:var(--lime)}
.grad-blue{
  background:linear-gradient(100deg,var(--cyan),var(--blue-bright));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

section{position:relative;padding:clamp(70px,9vw,140px) 0;z-index:1}
.sec-head{margin-bottom:clamp(34px,5vw,64px);max-width:760px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;font-family:var(--display);
  font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.86rem;
  padding:1.05em 1.7em;border-radius:100px;transition:.35s var(--ease);white-space:nowrap;
}
.btn svg{width:1.05em;height:1.05em;transition:.35s var(--ease)}
.btn-primary{background:var(--lime);color:#06210b;box-shadow:0 8px 30px rgba(200,253,4,.28)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 40px rgba(200,253,4,.45)}
.btn-primary:hover svg{transform:translateX(4px)}
.btn-ghost{background:var(--glass);border:1px solid var(--border-2);color:var(--text);backdrop-filter:blur(8px)}
.btn-ghost:hover{background:var(--glass-2);border-color:var(--lime);transform:translateY(-3px)}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.4s var(--ease);
}
.nav-inner{
  max-width:var(--maxw);margin-inline:auto;padding:18px var(--gut);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.nav.scrolled{background:rgba(5,10,30,.72);backdrop-filter:blur(18px) saturate(140%);border-bottom:1px solid var(--border)}
.nav.scrolled .nav-inner{padding-block:13px}

.brand{display:flex;align-items:center;gap:12px;font-family:var(--display);font-weight:800;letter-spacing:.02em}
.brand .logo{width:38px;height:38px;flex:none}
.brand .b-txt{font-size:1.02rem;line-height:1;text-transform:uppercase}
.brand .b-txt small{display:block;font-size:.6rem;letter-spacing:.22em;color:var(--lime);font-weight:700;margin-top:3px}

.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  font-size:.84rem;font-weight:600;color:var(--muted);padding:.5em .9em;border-radius:100px;
  transition:.25s var(--ease);position:relative;
}
.nav-links a:hover{color:var(--text)}
.nav-actions{display:flex;align-items:center;gap:14px}

.lang{display:flex;align-items:center;font-family:var(--display);font-weight:700;font-size:.82rem;
  border:1px solid var(--border-2);border-radius:100px;overflow:hidden}
.lang button{padding:.5em .85em;color:var(--muted-2);transition:.25s}
.lang button.active{background:var(--lime);color:#06210b}
.lang span{color:var(--border-2)}

.burger{display:none;width:44px;height:44px;border:1px solid var(--border-2);border-radius:12px;flex-direction:column;gap:5px;align-items:center;justify-content:center}
.burger span{width:20px;height:2px;background:var(--text);transition:.3s}

/* ============================================================
   HERO
   ============================================================ */
.hero{min-height:100vh;min-height:100svh;display:flex;align-items:center;padding-top:120px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.55}
.hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,var(--ink) 0%,rgba(5,10,30,.35) 38%,rgba(5,10,30,.7) 78%,var(--ink) 100%);}
.hero-bg::before{content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,var(--ink) 0%,rgba(5,10,30,.2) 55%,transparent 100%);z-index:1}
#net{position:absolute;inset:0;z-index:1;opacity:.9}

.hero-grid{position:relative;z-index:3;display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center;width:100%}
.hero-eyebrow{margin-bottom:26px}
.hero h1{
  font-family:var(--display);font-weight:900;text-transform:uppercase;
  font-size:clamp(2.6rem,6.8vw,5.6rem);line-height:.94;letter-spacing:-.015em;
}
.hero h1 .l2{display:block}
.hero .slogan{
  margin-top:22px;font-family:var(--display);font-weight:700;
  font-size:clamp(1.1rem,2.2vw,1.7rem);letter-spacing:.01em;line-height:1.18;
}
.hero .sub{margin-top:18px;color:var(--muted);font-size:clamp(1rem,1.4vw,1.15rem);max-width:46ch}
.hero-cta{margin-top:38px;display:flex;gap:14px;flex-wrap:wrap}

.hero-meta{display:flex;flex-direction:column;gap:16px}
.meta-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 24px;backdrop-filter:blur(12px);display:flex;gap:18px;align-items:center;
  transition:.35s var(--ease);
}
.meta-card:hover{border-color:var(--lime);transform:translateX(6px)}
.meta-card .ic{width:46px;height:46px;flex:none;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(43,111,255,.35),rgba(29,78,187,.1));border:1px solid var(--border-2)}
.meta-card .ic svg{width:22px;height:22px;stroke:var(--lime)}
.meta-card .lbl{font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted-2);font-family:var(--display);font-weight:700}
.meta-card .val{font-size:1.12rem;font-weight:700;font-family:var(--display);margin-top:2px}

.scroll-cue{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--muted-2);
  font-size:.66rem;letter-spacing:.25em;text-transform:uppercase;font-family:var(--display)}
.scroll-cue .mouse{width:24px;height:38px;border:2px solid var(--border-2);border-radius:14px;position:relative}
.scroll-cue .mouse::after{content:"";position:absolute;top:7px;left:50%;transform:translateX(-50%);width:4px;height:7px;border-radius:3px;background:var(--lime);animation:scrolldot 1.8s var(--ease) infinite}
@keyframes scrolldot{0%{opacity:0;top:7px}40%{opacity:1}80%{opacity:0;top:18px}100%{opacity:0}}

/* marquee strip under hero */
.marquee{border-block:1px solid var(--border);background:rgba(8,15,42,.6);overflow:hidden;white-space:nowrap;padding:16px 0;position:relative;z-index:5}
.marquee-track{display:inline-flex;gap:46px;animation:marq 32s linear infinite;will-change:transform}
.marquee-track span{font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.12em;font-size:.92rem;color:var(--muted);display:inline-flex;align-items:center;gap:46px}
.marquee-track span::after{content:"";width:6px;height:6px;background:var(--lime);border-radius:50%}
@keyframes marq{to{transform:translateX(-50%)}}

/* ============================================================
   STATS
   ============================================================ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.stat{padding:8px 4px}
.stat .num{font-family:var(--display);font-weight:900;font-size:clamp(2.4rem,5vw,3.6rem);line-height:1;
  background:linear-gradient(160deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .num .u{color:var(--lime);-webkit-text-fill-color:var(--lime)}
.stat .cap{margin-top:10px;color:var(--muted);font-size:.92rem}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vw,76px);align-items:center}
.about-copy p{color:var(--muted);font-size:1.08rem;margin-bottom:20px;max-width:54ch}
.about-copy p b{color:var(--text);font-weight:600}
.about-visual{position:relative}
.about-visual .ph{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);box-shadow:0 30px 80px rgba(0,0,0,.5)}
.about-visual .ph img{aspect-ratio:4/3;object-fit:cover;width:100%}
.about-badge{position:absolute;bottom:-24px;left:-24px;background:var(--lime);color:#06210b;
  border-radius:var(--radius);padding:20px 26px;font-family:var(--display);box-shadow:0 20px 50px rgba(200,253,4,.3)}
.about-badge .big{font-size:2.2rem;font-weight:900;line-height:1}
.about-badge .sm{font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;margin-top:4px}
.about-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.tag{font-family:var(--display);font-weight:600;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;
  padding:.55em 1em;border:1px solid var(--border-2);border-radius:100px;color:var(--muted)}

/* ============================================================
   WHY (cards)
   ============================================================ */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.why-card{
  position:relative;padding:34px 30px;border-radius:var(--radius-lg);
  background:var(--glass);border:1px solid var(--border);overflow:hidden;
  transition:.4s var(--ease);
}
.why-card::before{content:"";position:absolute;inset:0;opacity:0;transition:.4s var(--ease);
  background:radial-gradient(420px 220px at 50% -10%,rgba(43,111,255,.22),transparent 70%)}
.why-card:hover{transform:translateY(-8px);border-color:var(--border-2);background:var(--glass-2)}
.why-card:hover::before{opacity:1}
.why-card .num{font-family:var(--display);font-weight:800;font-size:.8rem;color:var(--lime);letter-spacing:.2em}
.why-ic{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;margin:16px 0 20px;
  background:linear-gradient(150deg,rgba(43,111,255,.28),rgba(29,78,187,.06));border:1px solid var(--border-2)}
.why-ic svg{width:28px;height:28px;stroke:var(--lime);fill:none;stroke-width:1.7}
.why-card h3{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:1.18rem;letter-spacing:-.01em;line-height:1.1}
.why-card p{color:var(--muted);margin-top:12px;font-size:.96rem}

/* ============================================================
   PROGRAM
   ============================================================ */
.prog-tabs{display:flex;gap:12px;margin-bottom:42px;flex-wrap:wrap}
.prog-tab{
  font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.04em;
  padding:1em 1.5em;border-radius:16px;border:1px solid var(--border);background:var(--glass);
  color:var(--muted);transition:.3s var(--ease);text-align:left;min-width:200px;
}
.prog-tab .d{font-size:.72rem;letter-spacing:.2em;color:var(--muted-2);display:block}
.prog-tab .t{font-size:1.05rem;margin-top:5px;color:inherit}
.prog-tab.active{background:linear-gradient(140deg,var(--blue),var(--blue-bright));border-color:transparent;color:#fff;box-shadow:0 14px 36px rgba(43,111,255,.32)}
.prog-tab.active .d{color:rgba(255,255,255,.7)}

.prog-panel{display:none;animation:fade .5s var(--ease)}
.prog-panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.timeline{position:relative;display:grid;gap:18px}
.tl-item{
  position:relative;display:grid;grid-template-columns:auto 1fr;gap:24px;
  padding:26px 30px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);
  transition:.35s var(--ease);
}
.tl-item:hover{border-color:var(--border-2);background:var(--glass-2);transform:translateX(6px)}
.tl-time{font-family:var(--display);font-weight:800;color:var(--lime);font-size:.84rem;letter-spacing:.08em;
  padding-top:3px;min-width:54px}
.tl-body h4{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:1.15rem;letter-spacing:-.005em}
.tl-body p{color:var(--muted);margin-top:7px;font-size:.97rem;max-width:60ch}
.tl-sub{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
.tl-sub li{font-size:.82rem;color:var(--text);background:rgba(43,111,255,.12);border:1px solid rgba(43,111,255,.28);
  padding:.45em .9em;border-radius:10px;font-weight:500}
.tl-sub.lime li{background:rgba(200,253,4,.08);border-color:rgba(200,253,4,.28)}
.tl-tag{display:inline-block;margin-top:14px;font-family:var(--display);font-weight:700;font-size:.7rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--lime);border:1px solid rgba(200,253,4,.35);border-radius:8px;padding:.4em .8em}

/* ============================================================
   VENUE
   ============================================================ */
.venue-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:stretch}
.venue-hero{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);min-height:420px}
.venue-hero img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.venue-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(5,10,30,.92))}
.venue-hero .cap{position:absolute;left:30px;bottom:28px;z-index:2}
.venue-hero .cap h3{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:1.8rem;line-height:1}
.venue-hero .cap p{color:var(--muted);margin-top:6px}
.venue-side{display:flex;flex-direction:column;gap:18px}
.venue-info{background:var(--glass);border:1px solid var(--border);border-radius:var(--radius);padding:26px;flex:1}
.venue-info h4{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:1.05rem;margin-bottom:14px}
.venue-info .row{display:flex;gap:13px;padding:11px 0;border-top:1px solid var(--border);color:var(--muted);font-size:.95rem}
.venue-info .row:first-of-type{border-top:none}
.venue-info .row svg{width:19px;height:19px;stroke:var(--lime);flex:none;margin-top:2px}
.venue-info .row b{color:var(--text);font-weight:600}
.venue-map{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);min-height:200px;flex:none}
.venue-map iframe{width:100%;height:230px;border:0;filter:grayscale(.3) invert(.92) hue-rotate(180deg) contrast(.9)}

/* ============================================================
   GALLERY
   ============================================================ */
/* Slider */
.slider-wrap{position:relative;overflow:hidden;border-radius:var(--radius);border:1px solid var(--border)}
.slider-track{display:flex;transition:transform .5s var(--ease)}
.sl-slide{flex:0 0 100%;position:relative;cursor:pointer}
.sl-slide img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.sl-caption{position:absolute;bottom:0;left:0;right:0;padding:18px 24px;
  background:linear-gradient(transparent,rgba(5,10,30,.8));color:var(--text);font-size:.9rem;letter-spacing:.04em;text-transform:uppercase}
.sl-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:10;
  width:48px;height:48px;border-radius:50%;background:var(--glass-2);border:1px solid var(--border-2);
  display:grid;place-items:center;transition:.3s;backdrop-filter:blur(8px)}
.sl-nav:hover{background:var(--lime);color:#06210b}
.sl-prev{left:16px}.sl-next{right:16px}
.sl-nav svg{width:22px;height:22px}
.sl-dots{display:flex;gap:8px;justify-content:center;padding:14px 0 4px}
.sl-dot{width:8px;height:8px;border-radius:50%;background:var(--border-2);transition:.3s}
.sl-dot.active{background:var(--lime);transform:scale(1.3)}

.lightbox{position:fixed;inset:0;z-index:200;background:rgba(3,6,18,.94);backdrop-filter:blur(8px);
  display:none;align-items:center;justify-content:center;padding:30px}
.lightbox.open{display:flex}
.lightbox img{max-width:90vw;max-height:84vh;border-radius:14px;box-shadow:0 30px 90px rgba(0,0,0,.7)}
.lb-close,.lb-nav{position:absolute;background:var(--glass-2);border:1px solid var(--border-2);border-radius:50%;
  width:54px;height:54px;display:grid;place-items:center;transition:.3s;backdrop-filter:blur(8px)}
.lb-close:hover,.lb-nav:hover{background:var(--lime);color:#06210b}
.lb-close{top:26px;right:26px}
.lb-nav svg,.lb-close svg{width:24px;height:24px}
.lb-prev{left:26px;top:50%;transform:translateY(-50%)}
.lb-next{right:26px;top:50%;transform:translateY(-50%)}

/* ============================================================
   BRAND MESSAGE
   ============================================================ */
.brand-sec{padding:0}
.brand-wrap{position:relative;min-height:84vh;display:flex;align-items:center;overflow:hidden}
.brand-wrap .bg{position:absolute;inset:0}
.brand-wrap .bg img{width:100%;height:100%;object-fit:cover;opacity:.62}
.brand-wrap .bg::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 50%,transparent,var(--ink) 85%),linear-gradient(180deg,var(--ink),transparent 30%,transparent 70%,var(--ink))}
.brand-inner{position:relative;z-index:2;text-align:center;width:100%}
.brand-inner .eyebrow{justify-content:center;margin-bottom:24px}
.brand-inner .eyebrow::after{content:"";width:28px;height:2px;background:var(--lime)}
.brand-inner h2{font-family:var(--display);font-weight:900;text-transform:uppercase;
  font-size:clamp(2.3rem,7vw,6rem);line-height:.95;letter-spacing:-.02em;max-width:18ch;margin-inline:auto}
.brand-inner h2 em{font-style:normal;color:var(--lime)}
.brand-themes{display:flex;flex-wrap:wrap;gap:14px 34px;justify-content:center;margin-top:38px}
.brand-themes span{font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.08em;
  font-size:clamp(.8rem,1.4vw,1rem);color:var(--muted);display:flex;align-items:center;gap:12px}
.brand-themes span::before{content:"";width:8px;height:8px;background:var(--lime);border-radius:50%}

/* ============================================================
   CTA + FOOTER
   ============================================================ */
.cta{text-align:center}
.cta-box{background:linear-gradient(150deg,rgba(29,78,187,.35),rgba(8,15,42,.5));
  border:1px solid var(--border-2);border-radius:var(--radius-lg);padding:clamp(40px,6vw,80px);
  position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 50% 0,rgba(43,111,255,.3),transparent 70%)}
.cta-box>*{position:relative;z-index:1}
.cta-box h2{font-family:var(--display);font-weight:900;text-transform:uppercase;font-size:clamp(2rem,5vw,3.4rem);line-height:1}
.cta-box p{color:var(--muted);margin:18px auto 32px;max-width:50ch;font-size:1.1rem}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

footer{border-top:1px solid var(--border);padding:60px 0 36px;position:relative;z-index:1}
.foot-grid{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap}
.foot-brand{max-width:340px}
.foot-brand p{color:var(--muted);margin-top:16px;font-size:.94rem}
.foot-col h5{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:.78rem;letter-spacing:.16em;color:var(--muted-2);margin-bottom:16px}
.foot-col a{display:block;color:var(--muted);font-size:.95rem;padding:5px 0;transition:.25s}
.foot-col a:hover{color:var(--lime)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;
  margin-top:44px;padding-top:26px;border-top:1px solid var(--border);color:var(--muted-2);font-size:.86rem}

/* ============================================================
   Reveal animations
   ============================================================ */
.reveal{opacity:0;transform:translateY(34px);transition:.8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}
.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}
.reveal[data-d="4"]{transition-delay:.32s}
.reveal[data-d="5"]{transition-delay:.4s}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-meta{flex-direction:row;flex-wrap:wrap}
  .meta-card{flex:1;min-width:200px}
  .about-grid,.venue-grid{grid-template-columns:1fr}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .sl-nav{width:38px;height:38px}
}
@media (max-width:760px){
  .nav-links{display:none}
  .burger{display:flex}
  .nav-actions .btn-primary{display:none}
  .stats{grid-template-columns:repeat(2,1fr);gap:30px 16px}
  .why-grid{grid-template-columns:1fr}
.tl-item{grid-template-columns:1fr;gap:10px}
  .about-badge{left:auto;right:16px}
  .prog-tab{flex:1;min-width:140px}
  .lb-prev{left:12px}.lb-next{right:12px}
  .hero h1{font-size:clamp(2.4rem,11vw,3.4rem)}

  /* mobile menu */
  .nav-links.open{display:flex;position:fixed;inset:64px 14px auto 14px;flex-direction:column;
    background:rgba(8,15,42,.96);backdrop-filter:blur(20px);border:1px solid var(--border-2);
    border-radius:20px;padding:16px;gap:4px;z-index:99}
  .nav-links.open a{padding:.9em 1em;font-size:1rem;border-radius:12px;width:100%}
  .nav-links.open a:hover{background:var(--glass-2)}
}

/* focus accessibility */
a:focus-visible,button:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}