/* =========================================================
   Helix Horizon Group — Core Stylesheet
   ========================================================= */

/* ---------- CSS Variables ---------- */
:root{
  --bg: #0b0f14;
  --panel: #0f1620;
  --panel-2: #0c121a;
  --text: #e7eef7;
  --muted: #9bb0c6;
  --line: #1a2a3d;
  --accent: #6fd3ff;
  --accent-2: #9bffcc;
  --shadow: 0 12px 35px rgba(0,0,0,.45);

  --radius: 18px;
  --radius-sm: 12px;
  --max: 1120px;
}

/* ---------- Reset / Base ---------- */
*{ box-sizing: border-box; }

html, body{
  height: 100%;
}

body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(1200px 800px at 20% 10%, rgba(111,211,255,.10), transparent 60%),
    radial-gradient(900px 600px at 80% 0%, rgba(155,255,204,.08), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

a:hover{
  text-decoration: underline;
}

.container{
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

/* ---------- Accessibility ---------- */
.skip-link{
  position: absolute;
  left: -999px;
  top: 1rem;
  background: var(--text);
  color: var(--bg);
  padding: .6rem .9rem;
  border-radius: 10px;
  z-index: 100;
}

.skip-link:focus{
  left: 1rem;
}

/* =========================================================
   Header & Navigation
   ========================================================= */

.site-header{
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11,15,20,.75);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(26,42,61,.6);
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .9rem 0;
  gap: 1rem;
}

.brand{
  display: flex;
  align-items: center;
  gap: .75rem;
}

.brand-mark{
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(111,211,255,.95), rgba(155,255,204,.75));
  box-shadow:
    0 0 0 1px rgba(255,255,255,.12) inset,
    var(--shadow);
}

.brand-text{
  display: grid;
}

.brand-name{
  font-weight: 700;
  letter-spacing: .2px;
}

.brand-tag{
  font-size: .86rem;
  color: var(--muted);
}

.nav{
  display: flex;
  align-items: center;
  gap: .9rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a{
  padding: .45rem .65rem;
  border-radius: 10px;
  color: var(--muted);
}

.nav a:hover{
  color: var(--text);
  background: rgba(255,255,255,.04);
  text-decoration: none;
}

.nav a[aria-current="page"]{
  color: var(--text);
  background: rgba(255,255,255,.06);
}

.nav-cta{
  border: 1px solid rgba(111,211,255,.35);
  color: var(--text) !important;
}

/* =========================================================
   Hero Section
   ========================================================= */

.hero{
  padding: 3.2rem 0 2.4rem;
  border-bottom: 1px solid rgba(26,42,61,.6);
}

.hero-inner{
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 1.5rem;
  align-items: start;
}

.eyebrow{
  display: inline-block;
  font-size: .85rem;
  color: var(--muted);
  border: 1px solid rgba(155,176,198,.25);
  padding: .25rem .6rem;
  border-radius: 999px;
  background: rgba(255,255,255,.03);
}

h1{
  margin: .9rem 0 .7rem;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.lead{
  margin: 0 0 1.2rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions{
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin-bottom: 1.35rem;
}

.stats{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
}

.stats dt{
  font-size: .85rem;
  color: var(--muted);
}

.stats dd{
  margin: 0;
  font-weight: 600;
}

/* =========================================================
   Buttons
   ========================================================= */

.button{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .72rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  text-decoration: none !important;
}

.button:hover{
  background: rgba(255,255,255,.08);
}

.button.primary{
  border-color: rgba(111,211,255,.45);
  background: linear-gradient(
    135deg,
    rgba(111,211,255,.18),
    rgba(155,255,204,.10)
  );
}

/* =========================================================
   Cards & Tiles
   ========================================================= */

.card{
  padding: 1.15rem 1.15rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(
    180deg,
    rgba(255,255,255,.06),
    rgba(255,255,255,.02)
  );
  box-shadow: var(--shadow);
}

.card-title{
  margin: 0 0 .45rem;
  font-weight: 650;
}

.card-body{
  margin: 0 0 .8rem;
  color: var(--muted);
}

.card-meta{
  margin: 0 0 .7rem;
  color: rgba(155,176,198,.85);
  font-size: .9rem;
}

.card-link{
  color: var(--text);
}

/* =========================================================
   Grid Sections
   ========================================================= */

.grid-section{
  padding: 2.6rem 0;
}

.grid-section h2{
  margin: 0 0 .35rem;
  font-size: 1.5rem;
}

.muted{
  color: var(--muted);
  margin: 0 0 1.25rem;
}

.grid{
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.tile{
  display: block;
  padding: 1.05rem;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(
    180deg,
    rgba(255,255,255,.05),
    rgba(255,255,255,.02)
  );
  box-shadow: 0 0 0 1px rgba(0,0,0,.25) inset;
}

.tile:hover{
  text-decoration: none;
  border-color: rgba(111,211,255,.25);
  background: linear-gradient(
    180deg,
    rgba(111,211,255,.08),
    rgba(255,255,255,.02)
  );
}

.tile h3{
  margin: 0 0 .35rem;
  font-size: 1.15rem;
}

.tile p{
  margin: 0 0 .75rem;
  color: var(--muted);
}

.tile-meta{
  font-size: .9rem;
  color: rgba(231,238,247,.8);
}

/* =========================================================
   Callout
   ========================================================= */

.callout{
  padding: 2.1rem 0;
  border-top: 1px solid rgba(26,42,61,.6);
  border-bottom: 1px solid rgba(26,42,61,.6);
  background: rgba(255,255,255,.02);
}

.callout-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer{
  padding: 2.2rem 0;
  border-top: 1px solid rgba(26,42,61,.6);
}

.footer-inner{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-brand{
  margin: 0 0 .35rem;
  font-weight: 700;
}

.footer-small{
  margin: 0;
  color: var(--muted);
  max-width: 46ch;
}

.footer-right{
  display: flex;
  gap: .9rem;
  flex-wrap: wrap;
}

.footer-right a{
  color: var(--muted);
}

.footer-right a:hover{
  color: var(--text);
  text-decoration: none;
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 900px){
  .hero-inner{
    grid-template-columns: 1fr;
  }
  .grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px){
  .grid{
    grid-template-columns: 1fr;
  }
  .nav{
    gap: .35rem;
  }
}