/* ===== RAJKOT 2026 — palette: forged copper + slate teal ===== */
  :root,html[data-theme="dark"]{
    --city:#e0773d;--teal:#2e8f86;--teal-2:#1f5f5b;
    --ink:#ffffff;--ink-dim:#dfe4e6;--ink-mute:#94a3a6;
    --paper:#101418;--paper-2:#171d23;--paper-3:#1f272e;
    --line:rgba(255,255,255,0.10);--line-2:rgba(255,255,255,0.20);
    --accent:#e0773d;--accent-2:#2e8f86;--accent-3:#1f5f5b;
    --brand-navy:#171d23;--brand-navy-dark:#101418;
    --shadow:0 28px 80px rgba(0,0,0,0.55);
    --hero-glow-1:rgba(224,119,61,0.07);--hero-glow-2:rgba(46,143,134,0.14);
    --img-blend:screen;--img-opacity:0.85;
  }
  html[data-theme="light"]{
    --city:#b4551f;--teal:#1f5f5b;--teal-2:#2e8f86;
    --ink:#151b21;--ink-dim:#43525c;--ink-mute:#7f8e96;
    --paper:#faf8f5;--paper-2:#f0ece7;--paper-3:#e3ded7;
    --line:rgba(21,27,33,0.12);--line-2:rgba(21,27,33,0.22);
    --accent:#b4551f;--accent-2:#1f5f5b;--accent-3:#2e8f86;
    --brand-navy:#151b21;--brand-navy-dark:#101418;
    --shadow:0 28px 80px rgba(21,27,33,0.12);
    --hero-glow-1:rgba(224,119,61,0.06);--hero-glow-2:rgba(46,143,134,0.08);
    --img-blend:multiply;--img-opacity:0.92;
  }
  html{background:var(--paper)}
  .logo-img{filter:none!important}
  footer .logo-img{filter:none}
  ::selection{background:var(--city);color:#fff}
  footer{background:#0b0e12}
  html[data-theme="light"] footer .footer-tag,html[data-theme="light"] footer .footer-col a{color:#c2cbcf}
  html[data-theme="light"] footer .footer-col h4,html[data-theme="light"] footer .footer-copy,html[data-theme="light"] footer .footer-legal{color:#94a3a6}
  html[data-theme="light"] footer .footer-col a:hover{color:var(--city)}
  html[data-theme="light"] footer .social-btn{border-color:rgba(255,255,255,0.18);color:#c2cbcf}
  html[data-theme="light"] .ch-hero-title span{color:var(--ink)!important}
  a{color:var(--city)}a:hover{color:var(--teal)}

  .city-eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:0.24em;text-transform:uppercase;color:var(--city);font-weight:600;margin-bottom:24px}
  .city-eyebrow::before{content:"";width:24px;height:1px;background:var(--city)}
  .city-eyebrow .pulse{width:8px;height:8px;border-radius:50%;background:var(--city);animation:pulse 2s infinite;box-shadow:0 0 0 4px color-mix(in srgb,var(--city) 22%,transparent)}

  .ch-hero{padding:80px 0 64px;position:relative;border-bottom:1px solid var(--line);overflow:hidden}
  .ch-hero::before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:80px 80px;mask-image:radial-gradient(ellipse 70% 80% at 50% 50%,black 30%,transparent 95%);-webkit-mask-image:radial-gradient(ellipse 70% 80% at 50% 50%,black 30%,transparent 95%)}
  .ch-meta-row{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;padding-bottom:24px;border-bottom:1px solid var(--line);margin-bottom:48px;position:relative;z-index:2}
  .ch-meta-row .breadcrumb{display:flex;gap:14px;align-items:center;font-family:var(--mono);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:var(--ink-mute)}
  .ch-meta-row .breadcrumb a{color:var(--ink-dim);transition:color 0.2s}
  .ch-meta-row .breadcrumb a:hover{color:var(--city)}
  .ch-meta-row .breadcrumb .sep{color:var(--ink-mute);opacity:0.5}
  .ch-meta-row .breadcrumb .current{color:var(--city)}
  .ch-hero-title{font-family:var(--display);font-weight:800;font-size:clamp(56px,11vw,178px);line-height:0.86;letter-spacing:-0.05em;margin-bottom:24px;position:relative;z-index:2;color:var(--ink)}
  .ch-hero-title em{font-style:normal;font-weight:800;color:var(--city)}
  .ch-hero-region{font-family:var(--display-serif);font-style:italic;font-size:clamp(22px,2.4vw,32px);color:var(--ink-dim);font-weight:400;letter-spacing:-0.015em;margin-bottom:48px;position:relative;z-index:2}
  .ch-hero-region em{font-style:italic;color:var(--city);font-weight:500}
  .ch-hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:64px;align-items:end;position:relative;z-index:2}
  .ch-lede{font-family:var(--sans);font-size:19px;line-height:1.55;font-weight:400;color:var(--ink-dim);letter-spacing:-0.01em;max-width:640px}
  .ch-lede span{color:var(--ink);font-weight:600}
  .ch-hero-cta{display:flex;flex-direction:column;gap:14px;align-items:flex-end}
  .ch-hero-cta .btn{width:fit-content}
  .ch-hero-fact-row{display:grid;grid-template-columns:repeat(4,1fr);margin-top:64px;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--paper-2);position:relative;z-index:2}
  .ch-hero-fact{padding:28px 32px;border-right:1px solid var(--line)}
  .ch-hero-fact:last-child{border-right:none}
  .ch-hero-fact .lab{font-family:var(--mono);font-size:12px;letter-spacing:0.2em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:10px;display:block}
  .ch-hero-fact .val{font-family:var(--display);font-size:21px;line-height:1.15;color:var(--ink);letter-spacing:-0.02em;font-weight:700}
  .ch-hero-fact .val em{font-style:normal;color:var(--city);font-weight:700}
  .ch-hero-fact .sub{font-family:var(--sans);font-size:12px;color:var(--ink-dim);margin-top:5px;font-weight:400;letter-spacing:0}

  .btn-primary{background:var(--city);color:#1a0d05;border-color:var(--city);font-weight:700}
  .btn-primary:hover{background:color-mix(in srgb,var(--city) 86%,white);border-color:color-mix(in srgb,var(--city) 86%,white);box-shadow:0 12px 28px color-mix(in srgb,var(--city) 32%,transparent)}
  html[data-theme="light"] .btn-primary{background:var(--brand-navy);color:#fff;border-color:var(--brand-navy)}
  html[data-theme="light"] .btn-primary:hover{background:var(--city);border-color:var(--city);color:#fff;box-shadow:0 12px 28px color-mix(in srgb,var(--city) 30%,transparent)}

  .bh-theme{padding:120px 0;background:var(--paper)}
  .bh-theme-head{display:grid;grid-template-columns:0.85fr 1.15fr;gap:72px;align-items:start}
  .bh-theme-kicker{font-family:var(--mono);font-size:14px;letter-spacing:0.24em;text-transform:uppercase;color:var(--city);font-weight:600;margin-bottom:10px}
  .bh-theme-title{font-family:var(--display);font-weight:800;font-size:clamp(30px,2.9vw,42px);line-height:1.06;letter-spacing:-0.035em;color:var(--ink)}
  .bh-theme-title em{font-style:italic;font-family:var(--display-serif);font-weight:500;color:var(--city)}
  .bh-theme-body p{font-size:17px;line-height:1.72;color:var(--ink-dim);margin-bottom:20px}
  .bh-theme-body p strong{color:var(--ink);font-weight:600}
  .bh-theme-body p:last-child{margin-bottom:0}
  .bh-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:6px;overflow:hidden;margin-top:72px}
  .bh-stat{background:var(--paper-2);padding:32px 28px}
  .bh-stat .n{font-family:var(--display);font-weight:800;font-size:clamp(34px,3.4vw,48px);line-height:1;letter-spacing:-0.04em;color:var(--ink);display:block}
  .bh-stat .n em{font-style:normal;color:var(--city);font-size:0.5em;vertical-align:super;font-weight:700;margin-left:2px}
  .bh-stat .l{font-family:var(--sans);font-size:15px;line-height:1.45;color:var(--ink-dim);margin-top:12px;max-width:220px}

  .ch-hero-eyebrow-logos{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
  .ch-hero-by{font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-mute)}
  .ch-hero-mg-logo{height:42px;width:auto;object-fit:contain}

  .bh-focus{padding:120px 0;background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .bh-focus-head{display:grid;grid-template-columns:1fr 1.6fr;gap:64px;align-items:end;margin-bottom:64px}
  .bh-focus-head .display{font-family:var(--display);font-weight:800;font-size:clamp(38px,4.2vw,64px);line-height:0.98;letter-spacing:-0.04em;color:var(--ink)}
  .bh-focus-head .display em{font-style:italic;font-family:var(--display-serif);font-weight:500;color:var(--city)}
  .bh-focus-head .lede{font-size:17px;color:var(--ink-dim);max-width:600px;line-height:1.65}
  .bh-topics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
  .bh-topic{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:36px 32px;transition:transform 0.4s cubic-bezier(0.2,0.8,0.2,1),border-color 0.3s,box-shadow 0.4s;position:relative;overflow:hidden}
  .bh-topic::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--city);transform:scaleY(0);transform-origin:top;transition:transform 0.5s cubic-bezier(0.2,0.8,0.2,1)}
  .bh-topic:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--city) 50%,var(--line));box-shadow:var(--shadow)}
  .bh-topic:hover::before{transform:scaleY(1)}
  .bh-topic .tnum{font-family:var(--mono);font-size:12px;letter-spacing:0.22em;color:var(--city);font-weight:600;display:block;margin-bottom:22px}
  .bh-topic .ttitle{font-family:var(--display);font-weight:700;font-size:22px;line-height:1.18;letter-spacing:-0.02em;color:var(--ink);margin-bottom:20px}
  .bh-topic ul{list-style:none;display:flex;flex-direction:column;gap:11px}
  .bh-topic li{position:relative;padding-left:20px;font-size:14.5px;line-height:1.5;color:var(--ink-dim)}
  .bh-topic li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;border:1.5px solid var(--city)}

  .bh-prog{padding:120px 0;background:var(--paper)}
  .bh-prog-tabs{display:inline-flex;gap:4px;background:var(--paper-2);border:1px solid var(--line);padding:6px;border-radius:100px;margin-bottom:14px}
  .bh-prog-tab{padding:12px 26px;border-radius:100px;background:transparent;border:none;font-family:var(--sans);font-size:14px;font-weight:600;color:var(--ink-dim);cursor:pointer;transition:all 0.2s;letter-spacing:0.01em}
  .bh-prog-tab .d{font-family:var(--mono);font-size:12px;letter-spacing:0.18em;display:block;margin-top:3px;opacity:0.75;font-weight:500}
  .bh-prog-tab.active{background:var(--city);color:#1a0d05}
  .bh-prog-note{font-family:var(--mono);font-size:12px;letter-spacing:0.18em;text-transform:uppercase;color:var(--city);font-weight:600;margin:18px 0 40px}
  .bh-prog-table{border-top:1px solid var(--line)}
  .bh-prog-row{display:grid;grid-template-columns:200px 1fr 150px;gap:40px;padding:26px 0;border-bottom:1px solid var(--line);align-items:baseline;transition:background 0.2s}
  .bh-prog-row:hover{background:linear-gradient(90deg,color-mix(in srgb,var(--city) 5%,transparent),transparent)}
  .bh-prog-row:hover .bh-prog-title{color:var(--city)}
  .bh-prog-time{font-family:var(--mono);font-size:13px;color:var(--city);letter-spacing:0.08em;font-weight:600}
  .bh-prog-time small{display:block;color:var(--ink-mute);font-size:12px;letter-spacing:0.14em;margin-top:5px;font-weight:500}
  .bh-prog-title{font-family:var(--display);font-size:21px;line-height:1.25;color:var(--ink);letter-spacing:-0.02em;font-weight:700;transition:color 0.2s}
  .bh-prog-sub{font-size:14px;color:var(--ink-mute);line-height:1.5;margin-top:6px}
  .bh-prog-tag{font-family:var(--mono);font-size:9px;letter-spacing:0.2em;text-transform:uppercase;color:var(--ink-mute);text-align:right;align-self:center}
  .bh-prog-row.feature .bh-prog-tag{color:var(--city)}
  .bh-prog-row.break{opacity:0.62}
  .bh-prog-row.break .bh-prog-title{font-family:var(--sans);font-weight:500;font-size:16px}

  .bh-who{padding:120px 0;background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .bh-who-head{display:grid;grid-template-columns:1fr 1.4fr;gap:64px;align-items:end;margin-bottom:56px}
  .bh-who-head .display{font-family:var(--display);font-weight:800;font-size:clamp(38px,4.2vw,64px);line-height:0.98;letter-spacing:-0.04em;color:var(--ink)}
  .bh-who-head .display em{font-style:italic;font-family:var(--display-serif);font-weight:500;color:var(--city)}
  .bh-who-head .lede{font-size:17px;color:var(--ink-dim);max-width:540px;line-height:1.65}
  .bh-who-grid{display:flex;flex-wrap:wrap;gap:12px}
  .bh-who-chip{font-family:var(--sans);font-size:15px;font-weight:500;color:var(--ink-dim);padding:13px 22px;border:1px solid var(--line);border-radius:100px;background:var(--paper);transition:all 0.2s}
  .bh-who-chip:hover{border-color:var(--city);color:var(--ink);background:color-mix(in srgb,var(--city) 7%,var(--paper))}

  .bh-partners{padding:100px 0;background:var(--paper);border-top:1px solid var(--line)}
  .bh-partners-title{font-family:var(--display);font-weight:800;font-size:clamp(32px,3.6vw,46px);line-height:1;letter-spacing:-0.035em;color:var(--ink);text-align:center;margin-bottom:44px}
  .bh-sp-logos{display:flex;flex-wrap:wrap;gap:24px;justify-content:center}
  .bh-sp-logo{display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);border-radius:6px;padding:26px 34px;width:230px;height:170px;transition:transform .25s,box-shadow .25s,border-color .25s}
  .bh-sp-logo:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--city) 50%,var(--line));box-shadow:var(--shadow)}
  .bh-sp-logo img{max-width:100%;max-height:100%;object-fit:contain}

  .bh-reg{padding:140px 0;background:var(--paper);position:relative;overflow:hidden;border-top:1px solid var(--line)}
  .bh-reg::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 60% 60% at 50% 30%,color-mix(in srgb,var(--city) 14%,transparent) 0%,transparent 70%);pointer-events:none}
  .bh-reg-inner{position:relative;z-index:2}
  .bh-reg-top{text-align:center;max-width:860px;margin:0 auto 64px}
  .bh-reg-title{font-family:var(--display);font-weight:800;font-size:clamp(48px,6.2vw,96px);line-height:0.94;letter-spacing:-0.045em;color:var(--ink)}
  .bh-reg-title em{font-style:italic;font-family:var(--display-serif);font-weight:500;color:var(--city);display:block}
  .bh-reg-lede{font-family:var(--display-serif);font-style:italic;font-size:22px;line-height:1.45;color:var(--ink-dim);margin:28px auto 40px;max-width:600px}
  .bh-reg-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
  .bh-reg-detail{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden;max-width:880px;margin:64px auto 0}
  .bh-reg-cell{background:var(--paper-2);padding:32px 30px}
  .bh-reg-cell .k{font-family:var(--mono);font-size:12px;letter-spacing:0.2em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:14px;display:block}
  .bh-reg-cell .v{font-family:var(--display);font-weight:700;font-size:24px;letter-spacing:-0.02em;color:var(--ink);line-height:1.15}
  .bh-reg-cell .v em{font-style:normal;color:var(--city)}
  .bh-reg-cell .s{font-size:13px;color:var(--ink-dim);margin-top:7px;line-height:1.5}
  .bh-contacts{max-width:880px;margin:48px auto 0}
  .bh-contacts-label{font-family:var(--mono);font-size:14px;letter-spacing:0.22em;text-transform:uppercase;color:var(--city);font-weight:600;display:flex;align-items:center;gap:14px;margin-bottom:22px}
  .bh-contacts-label::after{content:"";flex:1;height:1px;background:var(--line)}
  .bh-contacts-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
  .bh-contact{background:var(--paper-2);border:1px solid var(--line);border-radius:8px;padding:26px 24px;transition:all 0.25s}
  .bh-contact:hover{border-color:color-mix(in srgb,var(--city) 50%,var(--line));transform:translateY(-3px)}
  .bh-contact .region{font-family:var(--mono);font-size:11px;letter-spacing:0.2em;text-transform:uppercase;color:var(--city);font-weight:600;margin-bottom:16px}
  .bh-contact .name{font-family:var(--display);font-weight:700;font-size:19px;letter-spacing:-0.02em;color:var(--ink);margin-bottom:6px}
  .bh-contact .phone{font-family:var(--mono);font-size:13px;letter-spacing:0.04em;color:var(--ink-dim);transition:color 0.2s}
  .bh-contact:hover .phone{color:var(--city)}

  @media (max-width:1024px){
    .ch-hero-grid{grid-template-columns:1fr;gap:32px}
    .ch-hero-cta{align-items:flex-start}
    .ch-hero-fact-row{grid-template-columns:repeat(2,1fr)}
    .ch-hero-fact:nth-child(odd){border-right:1px solid var(--line)}
    .ch-hero-fact:nth-child(even){border-right:none}
    .ch-hero-fact:nth-child(1),.ch-hero-fact:nth-child(2){border-bottom:1px solid var(--line)}
    .bh-theme-head{grid-template-columns:1fr;gap:32px}
    .bh-stats{grid-template-columns:repeat(2,1fr)}
    .bh-focus-head{grid-template-columns:1fr;gap:24px}
    .bh-topics{grid-template-columns:1fr 1fr}
    .bh-prog-row{grid-template-columns:auto 1fr;gap:16px 24px}
    .bh-prog-tag{grid-column:span 2;text-align:left}
    .bh-who-head{grid-template-columns:1fr;gap:24px}
    .bh-reg-detail{grid-template-columns:1fr}
    .bh-contacts-grid{grid-template-columns:1fr 1fr}
  }
  @media (max-width:640px){
    .ch-hero-fact-row{grid-template-columns:1fr}
    .ch-hero-fact{border-right:none!important;border-bottom:1px solid var(--line)}
    .ch-hero-fact:last-child{border-bottom:none}
    .bh-stats{grid-template-columns:1fr}
    .bh-topics{grid-template-columns:1fr}
    .bh-contacts-grid{grid-template-columns:1fr}
    .bh-prog-row{grid-template-columns:1fr;gap:6px}
  }

/* Sponsors & Partners */
.bh-supporting-partners{padding:120px 0;background:var(--paper-2);border-top:1px solid var(--line)}
.sp-head{text-align:center;margin-bottom:64px}
.sp-head .display em{font-style:italic;font-family:var(--display-serif);font-weight:500;color:var(--city)}
.sp-tier{margin-top:56px}
.sp-tier:first-of-type{margin-top:0}
.sp-tier-label{display:flex;align-items:center;gap:20px;font-family:var(--mono);font-size:13px;letter-spacing:0.24em;text-transform:uppercase;color:var(--ink-dim);font-weight:600;margin-bottom:24px}
.sp-tier-label::before,.sp-tier-label::after{content:"";flex:1;height:1px;background:var(--line-2)}
.sp-gold .sp-tier-label{color:var(--city)}
.sp-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:20px}
.sp-logo{display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);border-radius:8px;padding:20px 28px;transition:transform .2s,box-shadow .2s,border-color .2s;width:220px;height:120px}
.sp-logo:hover{transform:translateY(-3px);border-color:var(--city);box-shadow:0 14px 30px rgba(0,0,0,.25)}
.sp-logo img{max-width:100%;max-height:100%;object-fit:contain;display:block}
.sp-gold .sp-logo{width:340px;height:180px;padding:28px 40px;border:2px solid var(--city)}
.sp-silver .sp-logo{width:260px;height:140px}
.sp-support .sp-logo{width:190px;height:104px;padding:16px 22px}
@media(max-width:640px){.bh-supporting-partners{padding:80px 0}.sp-logos{gap:12px}.sp-gold .sp-logo{width:100%;max-width:320px;height:150px}.sp-silver .sp-logo,.sp-bronze .sp-logo,.sp-support .sp-logo{width:calc(50% - 6px);height:96px;padding:12px 16px}}
.sp-split{display:grid;grid-template-columns:2fr 1fr;gap:40px;margin-top:56px}
.sp-split .sp-tier{margin-top:0}
@media(max-width:860px){.sp-split{grid-template-columns:1fr;gap:56px}}
/* Fallback: style the older markup (h3 + .bh-sp-logos / .bh-sp-logo) the same way */
.bh-supporting-partners h3{display:flex;align-items:center;gap:20px;font-family:var(--mono);font-size:13px;letter-spacing:0.24em;text-transform:uppercase;color:var(--ink-dim);font-weight:600;margin:56px 0 0}
.bh-supporting-partners h3::before,.bh-supporting-partners h3::after{content:"";flex:1;height:1px;background:var(--line-2)}
.bh-supporting-partners h2+br+h3,.bh-supporting-partners h2+h3{margin-top:40px;color:var(--city)}
.bh-sp-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:20px}
.bh-sp-logos br{display:none}
.bh-sp-logo{display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px 24px;width:220px;height:120px;transition:transform .2s,box-shadow .2s,border-color .2s}
.bh-sp-logo:hover{transform:translateY(-3px);border-color:var(--city);box-shadow:0 14px 30px rgba(0,0,0,.25)}
.bh-sp-logo img{max-width:100%;max-height:100%;object-fit:contain;display:block}
@media(max-width:640px){.bh-sp-logos{gap:12px}.bh-sp-logo{width:calc(50% - 6px);height:96px;padding:12px 16px}}