:root{
  --bg: #ffffff;
  --soft: #f5f8fd;
  --text: #0b1220;
  --muted: #475569;
  --muted-2: #64748b;
  --border: #e5edf7;
  --border-2: #d8e3f3;
  --primary: #2563eb;
  --primary-deep: #1d4ed8;
  --primary-2: #38bdf8;
  --shadow-sm: 0 10px 24px rgba(9, 22, 44, 0.08);
  --shadow-md: 0 18px 44px rgba(9, 22, 44, 0.16);
  --radius: 18px;
  --radius-pill: 999px;
  --container: 1160px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

[hidden]{ display: none !important; }

a{ color: inherit; text-decoration: none; }

.container{
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: #0b1220;
  color: #fff;
  z-index: 1000;
}
.skip-link:focus{ left: 12px; }

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,0.90);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  min-height: 96px;
  padding: 14px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 180px;
}
.brand-logo{
  display: none;
  height: 120px;
  width: auto;
}
.brand-text{
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.brand.has-logo .brand-logo{ display: block; }
.brand.has-logo .brand-text{ display: none; }
.nav{
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-link{
  font-size: 14px;
  color: var(--muted);
  padding: 10px 4px;
  border-radius: 12px;
}
.nav-link:hover{ color: var(--text); }
.header-cta{
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.auth{
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.auth-user{
  font-size: 13px;
  color: #334155;
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.auth-menu{
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 210px;
  padding: 8px;
  border-radius: 16px;
  background: rgba(255,255,255,0.98);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}
.auth-menu-item{
  width: 100%;
  display: flex;
  justify-content: flex-start;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: transparent;
  color: #0f172a;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.auth-menu-item:hover{ background: #f8fafc; border-color: #e3e9f6; }
.auth-menu-item:focus-visible{ outline: 3px solid rgba(37,99,235,0.20); outline-offset: 2px; }

.menu-btn{
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}
.menu-btn:focus-visible{ outline: 3px solid rgba(37,99,235,0.22); outline-offset: 2px; }
.menu-bars{
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: #0f172a;
  position: relative;
  border-radius: 2px;
}
.menu-bars::before,
.menu-bars::after{
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: #0f172a;
  border-radius: 2px;
}
.menu-bars::before{ top: -6px; }
.menu-bars::after{ top: 6px; }

.mobile-nav{
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.98);
}
.mobile-nav-inner{
  padding: 14px 0 18px;
  display: grid;
  gap: 8px;
}
.mobile-nav-inner .nav-link{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 12px;
  color: #334155;
  background: #fff;
}
.mobile-nav-inner .btn{ width: fit-content; margin-top: 6px; }

/* Typography helpers */
.kicker{
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 800;
}
.title-gradient{
  background: linear-gradient(90deg, var(--primary-deep) 0%, var(--primary) 48%, var(--primary-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 14px;
  padding: 12px 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.btn:focus-visible{ outline: 3px solid rgba(37,99,235,0.24); outline-offset: 3px; }
.btn-pill{ border-radius: var(--radius-pill); padding: 10px 18px; }
.btn-lg{ padding: 14px 22px; min-width: 210px; }
.btn-primary{
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover{ background: var(--primary-deep); }
.btn-secondary{
  background: #fff;
  border-color: #cfdaf0;
  color: #334155;
}
.btn-secondary:hover{ background: #f8fafc; border-color: #b8c8e6; }
.btn-arrow{ font-size: 18px; translate: 0 1px; }

/* Sections */
.section{
  padding: 86px 0;
  border-top: 1px solid var(--border);
}
.section-soft{
  background: var(--soft);
  border-top: 1px solid var(--border);
}
.section-head{
  text-align: center;
  max-width: 920px;
  margin: 0 auto 40px;
}
.section-title{
  margin: 0;
  font-size: clamp(40px, 4vw, 60px);
  letter-spacing: -0.04em;
  line-height: 1.04;
  font-weight: 900;
}
.section-subtitle{
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

/* Hero */
.hero{
  padding: 116px 0 84px;
}
.hero-inner{
  display: grid;
  justify-items: center;
  text-align: center;
}
.pill{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-2);
  background: #f3f6fb;
  color: var(--muted);
  font-size: 14px;
  box-shadow: 0 1px 0 rgba(16, 24, 40, 0.02);
}
.hero-title{
  margin: 28px 0 0;
  font-weight: 950;
  letter-spacing: -0.05em;
  line-height: 1.02;
  font-size: clamp(44px, 5.5vw, 82px);
}
.hero-title-top{ display: block; }
.hero-title-gradient{
  display: block;
  background: linear-gradient(90deg, var(--primary-deep) 0%, var(--primary) 46%, var(--primary-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-subtitle{
  margin: 18px 0 0;
  max-width: 900px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.7;
}
.hero-actions{
  margin-top: 34px;
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

/* Services cards */
.service-cards{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}
.service-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  padding: 28px;
  box-shadow: 0 1px 0 rgba(16, 24, 40, 0.02);
  min-height: 360px;
}
.service-icon{
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  display: grid;
  place-items: center;
  border: 1px solid rgba(37, 99, 235, 0.12);
}
.icon{ width: 22px; height: 22px; }
.service-title{
  margin: 18px 0 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.service-body{
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.75;
}
.checklist{
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
  color: #334155;
}
.checklist li{
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  align-items: start;
  font-size: 14px;
  line-height: 1.6;
}
.checklist li::before{
  content: "✓";
  color: var(--primary);
  font-weight: 900;
  translate: 0 2px;
}

/* Feature grid */
.feature-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.feature{
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 14px;
  align-items: center;
  padding: 22px 22px;
  border-radius: var(--radius);
  background: #f7faff;
  border: 1px solid var(--border);
}
.feature-icon{
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: rgba(37, 99, 235, 0.10);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.14);
}
.feature-title{
  margin: 0;
  font-size: 16px;
  letter-spacing: -0.02em;
}
.feature-body{
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 14px;
}

/* Dark sponsor sections */
.section-dark{
  border-top: 0;
  color: rgba(255,255,255,0.92);
  background:
    radial-gradient(1000px 500px at 50% -10%, rgba(56,189,248,0.18), rgba(0,0,0,0) 60%),
    radial-gradient(900px 450px at 80% 40%, rgba(37,99,235,0.22), rgba(0,0,0,0) 55%),
    linear-gradient(180deg, #0b1220 0%, #0a1222 35%, #091123 100%);
}
.section-dark + .section-dark{ border-top: 0; }
.section-dark-tight{ padding: 68px 0; }
.dark-head{
  text-align: center;
  max-width: 980px;
  margin: 0 auto 44px;
}
.dark-title{
  margin: 0;
  font-size: clamp(40px, 4.5vw, 64px);
  letter-spacing: -0.04em;
  line-height: 1.05;
  font-weight: 950;
}
.dark-title-gradient{
  background: linear-gradient(90deg, rgba(56,189,248,1) 0%, rgba(59,130,246,1) 55%, rgba(37,99,235,1) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.dark-subtitle{
  margin: 16px auto 0;
  color: rgba(226, 232, 240, 0.80);
  font-size: 18px;
  line-height: 1.7;
}
.dark-cards{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.dark-card{
  border-radius: var(--radius);
  padding: 26px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(148, 163, 184, 0.22);
  box-shadow: 0 24px 60px rgba(0,0,0,0.25);
}
.dark-icon{
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: rgba(147, 197, 253, 1);
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(59,130,246,0.28);
}
.dark-card-title{
  margin: 18px 0 0;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: rgba(255,255,255,0.94);
}
.dark-card-body{
  margin: 12px 0 0;
  color: rgba(226, 232, 240, 0.78);
  line-height: 1.75;
}

.sponsor-split{
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 26px;
  align-items: center;
}
.dark-list{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 18px;
}
.dark-list li{
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  align-items: start;
}
.dark-check{
  width: 36px;
  height: 36px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: rgba(37,99,235,0.16);
  border: 1px solid rgba(59,130,246,0.26);
  color: rgba(147, 197, 253, 1);
  font-weight: 900;
}
.dark-list-title{
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: rgba(255,255,255,0.92);
}
.dark-list-body{
  margin: 6px 0 0;
  color: rgba(226, 232, 240, 0.70);
}
.dark-cta{
  border-radius: 20px;
  padding: 34px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(255,255,255,0.06);
  box-shadow: 0 30px 70px rgba(0,0,0,0.25);
}
.dark-cta-title{
  margin: 0 0 22px;
  font-size: 20px;
  line-height: 1.6;
  color: rgba(226, 232, 240, 0.88);
}
.dark-cta-accent{
  color: rgba(147, 197, 253, 1);
  font-weight: 900;
}

/* Contact */
.contact{ max-width: 980px; }
.form{
  margin-top: 30px;
  padding: 28px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.field{ display: grid; gap: 8px; }
.field-full{ grid-column: 1 / -1; }
.label{
  font-size: 14px;
  font-weight: 700;
  color: #334155;
}
.input{
  width: 100%;
  border-radius: 14px;
  border: 1px solid #d7e1f2;
  padding: 14px 14px;
  font: inherit;
  color: var(--text);
  background: #fff;
}
.input::placeholder{ color: #9aa9c3; }
.input:focus{
  outline: 3px solid rgba(37,99,235,0.18);
  border-color: rgba(37,99,235,0.45);
}
.textarea{ resize: vertical; min-height: 160px; }
.form-actions{ display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }

/* Footer */
.footer{
  border-top: 1px solid var(--border);
  padding: 24px 0;
  background: #fff;
}
.footer-inner{
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 14px;
}
.footer-brand{
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 112px;
  color: inherit;
}
.footer-logo{
  display: none;
  height: 112px;
  width: auto;
}
.footer-brand-text{
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}
.footer-brand.has-logo .footer-logo{ display: block; }
.footer-brand.has-logo .footer-brand-text{ display: none; }
.footer-text{
  margin: 0;
  color: var(--muted-2);
  font-size: 14px;
  justify-self: center;
}
.footer-links{
  justify-self: end;
  display: inline-flex;
  gap: 18px;
  align-items: center;
}
.footer-links a{
  font-size: 14px;
  color: var(--muted-2);
}
.footer-links a:hover{ color: #334155; }

@media (max-width: 980px){
  .nav{ display: none; }
  .menu-btn{ display: inline-flex; align-items: center; justify-content: center; }
  .hero{ padding: 84px 0 64px; }
  .hero-subtitle{ font-size: 18px; }
  .header-inner{ padding: 12px 0; }
  .brand-logo{ height: 72px; }
  .service-cards{ grid-template-columns: 1fr; }
  .feature-grid{ grid-template-columns: 1fr; }
  .dark-cards{ grid-template-columns: 1fr; }
  .sponsor-split{ grid-template-columns: 1fr; }
  .footer-logo{ height: 72px; }
  .footer-brand{ min-height: 72px; }
  .footer-inner{ grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .footer-links{ justify-self: center; flex-wrap: wrap; justify-content: center; }
  .footer-text{ justify-self: center; }
  .footer-brand{ justify-self: center; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
}