/* ============================================================
   11th International Multitrack Conference on Mobile e-Services
   Theme: Evaton-style event/conference layout
   Palette matched to the MeS logo (azure blue #3899D5 + amber #F8AD20)
   Semantic note: --red = primary brand blue, --teal = amber accent
   ============================================================ */

:root{
  --navy:#0b3765;      /* deep brand blue (dark grounds) */
  --navy-2:#0e4276;
  --navy-3:#1c63a1;
  --red:#1f83c4;       /* PRIMARY = brand azure (buttons, eyebrows) */
  --red-dark:#16679f;
  --teal:#f4a71c;      /* ACCENT = logo amber (highlights, dots) */
  --teal-dark:#d98f0a;
  --gold:#f8ad20;
  --ink:#1a2237;
  --muted:#5b6478;
  --line:#e6e9f0;
  --bg:#ffffff;
  --bg-soft:#f5f7fb;
  --white:#fff;
  --radius:14px;
  --shadow:0 18px 40px -18px rgba(10,28,68,.28);
  --shadow-sm:0 8px 24px -12px rgba(10,28,68,.25);
  --container:1200px;
  --head:'Poppins',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5{font-family:var(--head);line-height:1.15;font-weight:700;color:var(--navy)}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
section{position:relative}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55rem;
  font-family:var(--head);font-weight:600;font-size:.95rem;
  padding:.85rem 1.7rem;border-radius:50px;border:2px solid transparent;
  cursor:pointer;transition:.25s;letter-spacing:.02em;white-space:nowrap;
}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-dark);transform:translateY(-2px);box-shadow:0 12px 24px -10px rgba(31,131,196,.55)}
.btn-teal{background:var(--teal);color:#3b2600}
.btn-teal:hover{background:var(--teal-dark);color:#3b2600;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:#fff;color:var(--navy);border-color:#fff}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-3);transform:translateY(-2px)}

/* ---------- Section headings ---------- */
.sec{padding:96px 0}
.sec-soft{background:var(--bg-soft)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 56px}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  text-transform:uppercase;letter-spacing:.18em;font-size:.78rem;font-weight:700;
  color:var(--red);font-family:var(--head);margin-bottom:14px;
}
.eyebrow::before,.eyebrow::after{content:"";width:26px;height:2px;background:var(--red);display:inline-block}
.sec-head h2{font-size:clamp(1.8rem,3.4vw,2.6rem);margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:1.02rem}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  transition:.3s;padding:18px 0;
}
.site-header.solid{background:var(--navy);box-shadow:0 6px 24px -12px rgba(0,0,0,.5);padding:12px 0}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:#fff}
.brand .logo{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--teal),var(--navy-3));
  font-family:var(--head);font-weight:800;color:#fff;font-size:1.05rem;
  border:1px solid rgba(255,255,255,.25);
}
.brand b{font-family:var(--head);font-size:1.05rem;line-height:1.1;display:block}
.brand span{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);opacity:.9}
.menu{display:flex;align-items:center;gap:6px;list-style:none}
.menu a{
  color:#e8ecf5;font-family:var(--head);font-weight:500;font-size:.93rem;
  padding:.5rem .9rem;border-radius:8px;transition:.2s;
}
.menu a:hover,.menu a.active{color:#fff;background:rgba(255,255,255,.1)}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:26px;height:2px;background:#fff;border-radius:2px;transition:.25s}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  min-height:100vh;display:flex;align-items:center;
  color:#fff;overflow:hidden;padding:130px 0 70px;
  background:
    radial-gradient(1200px 600px at 80% -10%,rgba(56,153,213,.28),transparent 60%),
    radial-gradient(900px 500px at 0% 100%,rgba(248,173,32,.20),transparent 55%),
    linear-gradient(135deg,rgba(9,34,62,.93) 0%,rgba(11,44,80,.86) 45%,rgba(16,58,102,.9) 100%),
    url("../img/hero-group.jpg");
  background-size:cover,cover,cover,cover;
  background-position:center,center,center,center;
  background-repeat:no-repeat;
}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:.6rem;background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);padding:.5rem 1rem;border-radius:50px;
  font-size:.82rem;font-weight:600;font-family:var(--head);letter-spacing:.03em;margin-bottom:22px;
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(248,173,32,.30)}
.hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.8rem);font-weight:800;letter-spacing:-.01em;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--teal)}
.hero .lead{font-size:1.08rem;color:#cdd6e8;max-width:560px;margin-bottom:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:26px;margin-bottom:30px}
.hero-meta .item{display:flex;align-items:center;gap:10px;font-family:var(--head);font-weight:500}
.hero-meta .ico{
  width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);font-size:1.1rem;
}
.hero-meta small{display:block;color:#9fb0cf;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;font-family:var(--body)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}

/* Countdown card */
.count-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:20px;padding:30px;backdrop-filter:blur(8px);box-shadow:var(--shadow);
}
.count-card h4{color:#fff;font-size:1rem;text-align:center;margin-bottom:6px;text-transform:uppercase;letter-spacing:.08em}
.count-card .sub{text-align:center;color:var(--teal);font-size:.82rem;margin-bottom:20px;font-family:var(--head)}
.countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.cd-box{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:14px 6px;text-align:center}
.cd-box b{display:block;font-family:var(--head);font-size:1.8rem;font-weight:800;color:#fff;line-height:1}
.cd-box span{font-size:.68rem;text-transform:uppercase;letter-spacing:.08em;color:#9fb0cf}
.count-card .cta-row{margin-top:22px;text-align:center}
.count-card .fee{margin-top:16px;text-align:center;color:#cdd6e8;font-size:.86rem}

/* Marquee strip */
.strip{background:var(--red);color:#fff;padding:14px 0;overflow:hidden}
.strip .track{display:flex;gap:48px;white-space:nowrap;animation:scroll 26s linear infinite;font-family:var(--head);font-weight:600;letter-spacing:.04em;font-size:.9rem}
.strip .track span{display:inline-flex;align-items:center;gap:12px}
.strip .track span::before{content:"◆";color:rgba(255,255,255,.65)}
@keyframes scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ============================================================
   ABOUT / STATS
   ============================================================ */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-media{position:relative}
.about-media img{border-radius:var(--radius);box-shadow:var(--shadow)}
.about-media .badge{
  position:absolute;bottom:-22px;left:-22px;background:var(--red);color:#fff;
  border-radius:16px;padding:18px 22px;box-shadow:var(--shadow);text-align:center;
}
.about-media .badge b{font-family:var(--head);font-size:2rem;display:block;line-height:1}
.about-media .badge span{font-size:.78rem;letter-spacing:.06em;text-transform:uppercase}
.about-text .eyebrow{justify-content:flex-start}
.about-text .eyebrow::before{display:none}
.about-text h2{font-size:clamp(1.7rem,3vw,2.4rem);margin-bottom:16px}
.about-text p{color:var(--muted);margin-bottom:16px}
.host-list{list-style:none;margin-top:20px;display:grid;gap:12px}
.host-list li{display:flex;gap:12px;align-items:flex-start}
.host-list .tick{color:var(--teal);font-weight:800;flex:none}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:70px}
.stat{text-align:center;padding:28px 16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.stat b{font-family:var(--head);font-size:2.4rem;color:var(--red);display:block;line-height:1}
.stat span{color:var(--muted);font-size:.9rem;font-weight:500}

/* Partners */
.partners{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-top:10px}
.partners .p{
  background:#fff;border:1px solid var(--line);border-radius:50px;padding:.7rem 1.4rem;
  font-family:var(--head);font-weight:600;color:var(--navy);font-size:.9rem;box-shadow:var(--shadow-sm);
}

/* ============================================================
   SPEAKERS
   ============================================================ */
.speaker-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.speaker{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:.3s;text-align:center;
}
.speaker:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.speaker .photo{position:relative;aspect-ratio:1/1;overflow:hidden;background:var(--navy)}
.speaker .photo img{width:100%;height:100%;object-fit:cover;transition:.4s}
.speaker:hover .photo img{transform:scale(1.06)}
.speaker .photo.placeholder{display:grid;place-items:center;
  background:linear-gradient(135deg,var(--navy-3),var(--teal-dark));}
.speaker .photo.placeholder span{font-family:var(--head);font-weight:800;font-size:3rem;color:rgba(255,255,255,.9)}
.speaker .info{padding:20px 16px}
.speaker .info h4{font-size:1.05rem;margin-bottom:4px}
.speaker .info .role{color:var(--red);font-size:.82rem;font-weight:600;font-family:var(--head);display:block;margin-bottom:6px}
.speaker .info .org{color:var(--muted);font-size:.82rem}
.speaker .tag{
  display:inline-block;margin-top:12px;font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;
  background:var(--bg-soft);color:var(--navy);padding:.3rem .7rem;border-radius:50px;font-weight:600;
}

/* ============================================================
   TRACKS
   ============================================================ */
.track-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.track-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;
  box-shadow:var(--shadow-sm);transition:.3s;position:relative;overflow:hidden;
}
/* .track-card::before{content:"";position:absolute;top:0;left:0;width:5px;height:100%;background:var(--teal);transition:.3s} */
.track-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.track-card:nth-child(2)::before{background:var(--red)}
.track-card:nth-child(3)::before{background:var(--gold)}
.track-card:nth-child(4)::before{background:var(--navy-3)}
.track-card:nth-child(5)::before{background:var(--teal-dark)}
.track-head{display:flex;align-items:center;gap:16px;margin-bottom:16px}
.track-num{
  width:54px;height:54px;border-radius:14px;flex:none;display:grid;place-items:center;
  font-family:var(--head);font-weight:800;font-size:1.3rem;color:#fff;
  background-color:#3898d4;
}
.track-head h3{font-size:1.25rem}
.track-head .k{font-size:.76rem;text-transform:uppercase;letter-spacing:.1em;color:var(--red);font-weight:700}
.track-card .topics{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.track-card .topics span{
  font-size:.78rem;background:var(--bg-soft);border:1px solid var(--line);
  color:var(--muted);padding:.3rem .7rem;border-radius:50px;
}

/* Abstract / format callout */
.callout{
  display:grid;grid-template-columns:1.1fr .9fr;gap:0;border-radius:20px;overflow:hidden;
  box-shadow:var(--shadow);margin-top:56px;
}
.callout .left{background:var(--navy);color:#fff;padding:44px}
.callout .left h3{color:#fff;font-size:1.5rem;margin-bottom:14px}
.callout .left p{color:#cdd6e8;margin-bottom:14px}
.callout .left ul{list-style:none;display:grid;gap:10px}
.callout .left li{display:flex;gap:10px;color:#e8ecf5}
.callout .left .tick{color:var(--teal);font-weight:800}
.callout .right{background:var(--teal);color:#fff;padding:44px;display:flex;flex-direction:column;justify-content:center}
.callout .right h4{color:#fff;text-transform:uppercase;letter-spacing:.08em;font-size:.9rem;margin-bottom:18px;opacity:.9}
.callout .email{background:rgba(255,255,255,.15);border-radius:12px;padding:14px 18px;margin-bottom:12px;font-family:var(--head);font-weight:600;word-break:break-all}
.callout .right small{opacity:.9}

/* ============================================================
   TIMELINE (deadlines / schedule)
   ============================================================ */
.timeline{max-width:820px;margin:0 auto;position:relative;padding-left:8px}
.timeline::before{content:"";position:absolute;left:26px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl-item{display:flex;gap:24px;padding:14px 0;position:relative}
.tl-dot{width:54px;height:54px;flex:none;border-radius:50%;display:grid;place-items:center;
  background:#fff;border:2px solid var(--teal);color:var(--navy);font-family:var(--head);font-weight:800;
  position:relative;z-index:2;box-shadow:var(--shadow-sm);font-size:.8rem;text-align:center}
.tl-item.done .tl-dot{background:var(--red);border-color:var(--red);color:#fff}
.tl-body{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;flex:1;box-shadow:var(--shadow-sm)}
.tl-body h4{font-size:1.05rem;margin-bottom:2px}
.tl-body .date{color:var(--red);font-weight:700;font-family:var(--head);font-size:.9rem}
.tl-body p{color:var(--muted);font-size:.9rem;margin-top:4px}

/* ============================================================
   PRICING / FEES
   ============================================================ */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.price{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:34px 26px;text-align:center;
  box-shadow:var(--shadow-sm);transition:.3s;position:relative;
}
.price:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.price.feature{background:var(--navy);color:#fff;border-color:var(--navy)}
.price.feature h4,.price.feature .amt{color:#fff}
.price .ptype{text-transform:uppercase;letter-spacing:.1em;font-size:.78rem;font-weight:700;color:var(--red);font-family:var(--head)}
.price.feature .ptype{color:var(--teal)}
.price .amt{font-family:var(--head);font-weight:800;font-size:2.4rem;margin:14px 0 4px;color:var(--navy)}
.price .amt small{font-size:.9rem;font-weight:600;color:var(--muted)}
.price ul{list-style:none;margin:18px 0;display:grid;gap:8px;text-align:left}
.price li{display:flex;gap:9px;font-size:.9rem;color:var(--muted)}
.price.feature li{color:#cdd6e8}
.price li .tick{color:var(--teal);font-weight:800}
.price .ribbon{position:absolute;top:16px;right:-30px;transform:rotate(45deg);background:var(--red);color:#fff;font-size:.68rem;font-weight:700;padding:4px 36px;font-family:var(--head)}

/* ============================================================
   GALLERY
   ============================================================ */
.gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.gallery-grid a{border-radius:12px;overflow:hidden;aspect-ratio:3/2;box-shadow:var(--shadow-sm)}
.gallery-grid img{width:100%;height:100%;object-fit:cover;transition:.4s}
.gallery-grid a:hover img{transform:scale(1.08)}

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner{
  color:#fff;text-align:center;padding:80px 0;
  background:radial-gradient(700px 400px at 50% 0%,rgba(56,153,213,.32),transparent 60%),linear-gradient(135deg,var(--navy),var(--navy-3));
}
.cta-banner h2{color:#fff;font-size:clamp(1.8rem,3.5vw,2.6rem);margin-bottom:14px}
.cta-banner p{color:#cdd6e8;max-width:560px;margin:0 auto 26px}
.cta-banner .actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ============================================================
   FORMS
   ============================================================ */
.form-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:0;border-radius:20px;overflow:hidden;box-shadow:var(--shadow)}
.form-aside{background:var(--navy);color:#fff;padding:44px}
.form-aside h3{color:#fff;font-size:1.5rem;margin-bottom:14px}
.form-aside p{color:#cdd6e8;margin-bottom:22px;font-size:.95rem}
.form-aside .fact{display:flex;gap:12px;align-items:flex-start;margin-bottom:16px}
.form-aside .fact .ico{width:40px;height:40px;border-radius:10px;background:rgba(255,255,255,.1);display:grid;place-items:center;flex:none}
.form-aside .fact small{display:block;color:#9fb0cf;font-size:.75rem;text-transform:uppercase;letter-spacing:.08em}
.form-aside .fact b{font-family:var(--head)}
.form-main{background:#fff;padding:44px}
.field{margin-bottom:18px}
.field label{display:block;font-family:var(--head);font-weight:600;font-size:.88rem;margin-bottom:7px;color:var(--navy)}
.field label .req{color:var(--red)}
.field input,.field select,.field textarea{
  width:100%;padding:.8rem 1rem;border:1.5px solid var(--line);border-radius:10px;
  font-family:var(--body);font-size:.95rem;color:var(--ink);background:#fff;transition:.2s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(31,131,196,.16)}
.field textarea{resize:vertical;min-height:120px}
.field .hint{font-size:.78rem;color:var(--muted);margin-top:5px}
.field.error input,.field.error select,.field.error textarea{border-color:var(--red)}
.field .err-msg{display:none;color:var(--red);font-size:.78rem;margin-top:5px}
.field.error .err-msg{display:block}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:.84rem;color:var(--muted);margin-bottom:20px}
.form-success{display:none;background:#e8f8f0;border:1.5px solid var(--teal);border-radius:12px;padding:18px 20px;color:var(--teal-dark);font-weight:600;margin-bottom:18px}
.form-success.show{display:block}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:48px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;text-align:center;box-shadow:var(--shadow-sm);transition:.3s}
.contact-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.contact-card .ico{width:60px;height:60px;border-radius:16px;margin:0 auto 16px;display:grid;place-items:center;font-size:1.5rem;color:#fff;background-color:#3898d4}
.contact-card h4{margin-bottom:8px}
.contact-card p{color:var(--muted);font-size:.92rem;word-break:break-word}
.contact-card a{color:var(--red);font-weight:600}
.loc-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow-sm)}
.loc-box h3{margin-bottom:6px}
.loc-box .members{columns:3;column-gap:28px;margin-top:18px}
.loc-box .members span{display:block;break-inside:avoid;padding:5px 0;color:var(--ink);font-size:.9rem;border-bottom:1px dashed var(--line)}

/* ============================================================
   PAGE HERO (inner pages)
   ============================================================ */
.page-hero{
  color:#fff;padding:150px 0 70px;text-align:center;
  background:radial-gradient(800px 400px at 70% 0%,rgba(56,153,213,.28),transparent 60%),linear-gradient(135deg,#092240,#0e4276);
}
.page-hero h1{color:#fff;font-size:clamp(2rem,4vw,3rem);margin-bottom:12px}
.page-hero .crumb{color:#9fb0cf;font-family:var(--head);font-size:.9rem}
.page-hero .crumb a:hover{color:var(--teal)}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:#06122c;color:#c3cde0;padding:70px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:44px}
.footer h5{color:#fff;font-size:1rem;margin-bottom:18px;text-transform:uppercase;letter-spacing:.06em}
.footer .brand{margin-bottom:16px}
.footer p{font-size:.9rem;color:#93a2c2;margin-bottom:14px}
.footer ul{list-style:none;display:grid;gap:10px}
.footer ul a{font-size:.9rem;color:#a9b6d4;transition:.2s}
.footer ul a:hover{color:var(--teal);padding-left:4px}
.news-form{display:flex;gap:8px;margin-top:6px}
.news-form input{flex:1;padding:.7rem .9rem;border-radius:8px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.06);color:#fff;font-size:.88rem}
.news-form input::placeholder{color:#7f8eb0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;text-align:center;font-size:.85rem;color:#7f8eb0}
.footer-bottom a{color:var(--teal)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:980px){
  .hero .container{grid-template-columns:1fr;gap:40px}
  .about-grid,.callout,.form-wrap{grid-template-columns:1fr}
  .speaker-grid,.price-grid,.gallery-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .track-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .loc-box .members{columns:2}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .menu,.nav-cta .btn{display:none}
  .burger{display:flex}
  .menu.open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    background:var(--navy);padding:16px;gap:4px;box-shadow:var(--shadow)}
  .menu.open a{display:block}
  .sec{padding:64px 0}
  .hero-meta{gap:16px}
}
@media(max-width:520px){
  .speaker-grid,.price-grid,.gallery-grid,.stats{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .loc-box .members{columns:1}
  .countdown{grid-template-columns:repeat(4,1fr)}
}

/* ============================================================
   Brand logo image (added for CI4 build)
   ============================================================ */
.brand{gap:12px}
.brand-logo{height:48px;width:48px;object-fit:contain;border-radius:10px;background:#fff;padding:3px;flex:none;box-shadow:0 4px 12px -6px rgba(0,0,0,.4)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-family:var(--head);font-size:1.05rem}
.brand-text span{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);opacity:.95}
.footer .brand-text b{color:#fff}
.footer .brand-logo{background:#fff}

/* ============================================================
   Proceedings archive — paper list
   ============================================================ */
.paper-list{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);background:#fff}
.paper-row{display:flex;align-items:center;gap:18px;padding:18px 22px;border-bottom:1px solid var(--line);transition:.2s}
.paper-row:last-child{border-bottom:0}
.paper-row:hover{background:var(--bg-soft)}
.paper-row .pico{width:44px;height:44px;flex:none;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--navy),var(--navy-3));color:#fff;font-size:1.1rem;font-weight:700;font-family:var(--head)}
.paper-row .pmeta{flex:1;min-width:0}
.paper-row .pmeta h4{font-size:1rem;margin:0 0 3px;line-height:1.35}
.paper-row .pmeta small{color:var(--muted);font-size:.8rem}
.paper-row .pdl{flex:none;display:inline-flex;align-items:center;gap:.5rem;background:var(--red);color:#fff;
  font-family:var(--head);font-weight:600;font-size:.85rem;padding:.55rem 1.1rem;border-radius:50px;transition:.2s;white-space:nowrap}
.paper-row .pdl:hover{background:var(--red-dark);transform:translateY(-1px)}
.archive-back{display:inline-flex;align-items:center;gap:.5rem;color:var(--red);font-weight:600;font-family:var(--head);font-size:.9rem;margin-bottom:22px}
@media(max-width:620px){
  .paper-row{flex-wrap:wrap}
  .paper-row .pdl{width:100%;justify-content:center;margin-top:6px}
}

/* ============================================================
   Partner logos (home page)
   ============================================================ */
.partner-logos{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:22px}
.partner-logo{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  min-width:200px;height:120px;padding:22px 28px;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-sm);transition:.3s;flex:0 1 auto;
}
.partner-logo:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.partner-logo img{max-height:74px;max-width:230px;width:auto;height:auto;object-fit:contain}
.partner-logo .p{background:none;border:0;box-shadow:none;padding:0;color:var(--navy);
  font-family:var(--head);font-weight:600;font-size:.95rem;text-align:center;line-height:1.35}
@media(max-width:620px){
  .partner-logo{min-width:0;width:100%;height:104px}
}

/* ============================================================
   Header menu — keep on one line + Pay Fee CTA (override)
   ============================================================ */
.nav .menu{flex-wrap:nowrap;gap:2px}
.nav .menu a{white-space:nowrap;flex:0 0 auto;padding:.5rem .7rem;font-size:.9rem}
.nav .menu a.pay{
  background:var(--teal);color:#3b2600;font-weight:700;border-radius:50px;
  padding:.5rem 1.1rem;margin-left:6px;
}
.nav .menu a.pay:hover,.nav .menu a.pay.active{background:var(--teal-dark);color:#3b2600}
@media(max-width:940px){
  .nav .menu a{padding:.45rem .55rem;font-size:.85rem}
  .nav .menu a.pay{padding:.45rem .9rem}
}

/* ============================================================
   Mobile overflow & polish (fix right-side white gap)
   ============================================================ */
html,body{overflow-x:hidden;max-width:100%}
*{min-width:0}
.container{width:100%}
.hero{background-attachment:scroll}
@media(max-width:760px){
  .hero{min-height:auto;padding:110px 0 56px}
  .hero h1{font-size:clamp(1.9rem,8vw,2.6rem)}
  .hero-actions .btn{width:100%;justify-content:center}
  .count-card{padding:22px}
}
@media(max-width:400px){
  .cd-box b{font-size:1.4rem}
  .cd-box{padding:12px 4px}
}

/* ============================================================
   Sponsor call-to-action (home)
   ============================================================ */
.sponsor-cta{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
  background:linear-gradient(135deg,var(--navy),var(--navy-3));border-radius:20px;padding:44px;
  color:#fff;box-shadow:var(--shadow);position:relative;overflow:hidden}
.sponsor-cta::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(248,173,32,.35),transparent 70%)}
.sponsor-cta .eyebrow{color:var(--teal)}
.sponsor-cta .eyebrow::before,.sponsor-cta .eyebrow::after{background:var(--teal)}
.sponsor-cta h2{color:#fff;font-size:clamp(1.5rem,2.6vw,2rem);margin-bottom:12px}
.sponsor-cta p{color:#cdd6e8;margin-bottom:22px}
.sponsor-cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2}
.sponsor-cta-perks{display:grid;grid-template-columns:1fr 1fr;gap:14px;position:relative;z-index:2}
.perk{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:16px}
.perk span{font-size:1.5rem;display:block;margin-bottom:8px}
.perk b{display:block;font-family:var(--head);font-size:.98rem}
.perk small{color:#9fb0cf;font-size:.8rem}
@media(max-width:860px){
  .sponsor-cta{grid-template-columns:1fr;padding:32px}
}
@media(max-width:460px){
  .sponsor-cta-perks{grid-template-columns:1fr}
}