/* SEN-Connect — minimal, modern, light (no heavy deps) */

:root{
  --bg: #f6f8fb;
  --surface: #ffffff;
  --text: #1f2933;
  --muted: #5b6776;
  --line: #e6ebf2;

  --accent: #3b82f6;
  --accent-2: #7c3aed;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  --radius: 16px;
}

*{ box-sizing:border-box; margin:0; padding:0; }

html{ scroll-behavior:smooth; }

body{
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(59,130,246,0.14), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(124,58,237,0.10), transparent 55%),
    var(--bg);
  line-height:1.6;
}

a{ color: var(--accent); text-decoration:none; }

.container{
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Top announcement bar */
.topbar{
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  flex-wrap: wrap;
}
.topbar-badge{
  display:inline-flex;
  align-items:center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(59,130,246,0.10);
  border: 1px solid rgba(59,130,246,0.22);
  color: #1d4ed8;
  font-weight: 600;
  font-size: 0.85rem;
}
.topbar-text{
  color: var(--muted);
  font-size: 0.95rem;
}
.topbar-link{
  color: var(--text);
  font-weight: 600;
  border-bottom: 1px dashed rgba(31,41,51,0.35);
}
.topbar-link:focus-visible,
.topbar-link:hover{ border-bottom-color: rgba(31,41,51,0.75); }

/* Header */
.header{
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  z-index: 100;
}
.header .container{
  display:flex;
  align-items:center;
  justify-content: space-between;
  height: 64px;
}

.logo{
  font-weight: 700;
  letter-spacing: 0.2px;
  font-size: 1.05rem;
}

.nav ul{
  display:flex;
  gap: 18px;
  list-style:none;
  align-items:center;
}

.nav a{
  font-size: 0.95rem;
  color: var(--muted);
  padding: 10px 10px;
  border-radius: 10px;
  transition: background 160ms ease, color 160ms ease;
}
.nav a:hover{ background: rgba(59,130,246,0.08); color: var(--text); }
.nav a.active{ background: rgba(59,130,246,0.12); color: var(--text); }

.burger{
  display:none;
  font-size: 1.5rem;
  background:none;
  border:none;
  color: var(--text);
  padding: 10px;
  border-radius: 10px;
}
.burger:focus-visible,
.burger:hover{ background: rgba(31,41,51,0.06); }

/* Sections */
.section{
  padding: 78px 0;
}

.section.alt{
  background: transparent;
}

.section .container{
  position: relative;
}

.section-card{
  background: rgba(255,255,255,0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.hero{
  padding-top: 110px;
}

.hero .section-card{
  padding: 34px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.92), rgba(255,255,255,0.72));
}

h1{
  font-size: clamp(2rem, 3vw, 2.55rem);
  margin-bottom: 14px;
  line-height: 1.15;
}
.subtitle{
  max-width: 760px;
  font-size: 1.05rem;
  color: var(--muted);
}

h2{
  font-size: 1.55rem;
  margin-bottom: 14px;
  letter-spacing: -0.2px;
}
p{ margin-top: 10px; color: var(--text); }
p + p{ margin-top: 12px; }

/* Buttons */
.hero-actions{
  margin-top: 22px;
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  min-height: 44px;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}
.btn:focus-visible{ outline: 3px solid rgba(59,130,246,0.25); outline-offset: 2px; }
.btn:hover{ transform: translateY(-1px); }

.btn-primary{
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 24px rgba(59,130,246,0.18);
}
.btn-primary:hover{ box-shadow: 0 14px 30px rgba(59,130,246,0.22); }

.btn-ghost{
  background: rgba(255,255,255,0.65);
  border-color: var(--line);
  color: var(--text);
}
.btn-ghost:hover{ background: rgba(255,255,255,0.9); }

/* Lists */
.list{
  margin-top: 14px;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.list li{
  display:flex;
  gap: 10px;
  align-items:flex-start;
  padding: 12px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,0.70);
}
.list li::before{
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-top: 6px;
  flex: 0 0 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.grid{
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

/* Contact */
.contact-email{
  margin-top: 14px;
  font-size: 1.05rem;
}
.contact-email a{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.78);
  box-shadow: 0 10px 24px rgba(17,24,39,0.06);
  color: var(--text);
  font-weight: 700;
}
.contact-email a:hover{ border-color: rgba(59,130,246,0.35); }

/* Footer */
.footer{
  padding: 26px 0;
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,0.75);
  text-align:center;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Reveal animation */
[data-reveal="true"]{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms ease, transform 500ms ease;
}
[data-reveal="true"].is-visible{
  opacity: 1;
  transform: translateY(0);
}

/* Mobile nav */
@media (max-width: 820px){
  .nav{
    position:absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(10px);
    display:none;
    border-bottom: 1px solid var(--line);
  }
  .nav.open{ display:block; }
  .nav ul{
    flex-direction: column;
    padding: 14px;
    gap: 6px;
    align-items: stretch;
  }
  .nav a{ width: 100%; }
  .burger{ display:block; }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .btn, [data-reveal="true"]{ transition: none; }
}