:root{
  --bg: #f7fafc;               /* page background */
  --surface: #ffffff;          /* card / sheet background */
  --muted: #6b7280;            /* secondary text */
  --text: #0b1220;             /* primary text */
  --accent: #0ea5ff;           /* primary accent (calm blue) */
  --accent-2: #7c3aed;         /* secondary accent for subtle gradients */
  --glass: rgba(255,255,255,0.6);
  --shadow-1: 0 6px 20px rgba(16,24,40,0.06);
  --shadow-2: 0 4px 12px rgba(2,6,23,0.06);
  --radius: 14px;
  --max: 1100px;
  --gutter: 28px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Segoe UI Mono", monospace;
  --ui-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui;
}

/* Dark mode variables */
@media (prefers-color-scheme: dark) {
  :root{
    --bg: #0b1220;
    --surface: #071024;
    --muted: #9aa6b2;
    --text: #e6f0ff;
    --accent: #58b7ff;
    --accent-2: #9b7bff;
    --glass: rgba(255,255,255,0.03);
    --shadow-1: 0 8px 28px rgba(2,6,23,0.6);
    --shadow-2: 0 6px 18px rgba(2,6,23,0.5);
  }
}

/* Reset / base */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--ui-font);
  background: linear-gradient(180deg, var(--bg), color-mix(in srgb, var(--bg) 92%, white 8%));
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
  font-size:16px;
}

/* layout container */
.wrap{
  max-width:var(--max);
  margin:0 auto;
  padding:var(--gutter);
}

/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:40;
  background:linear-gradient(180deg, rgba(255,255,255,0.6), rgba(255,255,255,0.3));
  backdrop-filter: blur(8px);
  border-bottom: 1px solid color-mix(in srgb, var(--muted) 8%, transparent);
  box-shadow: var(--shadow-2);
}
.site-header .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:16px;
  padding-bottom:16px;
}
.logo{
  font-weight:700;
  font-size:18px;
  letter-spacing: -0.02em;
  color:var(--text);
  text-decoration:none;
}
.nav{
  display:flex;
  align-items:center;
  gap:16px;
}
.nav a{
  color:var(--muted);
  text-decoration:none;
  padding:6px 10px;
  border-radius:10px;
  font-weight:600;
  transition: all .18s ease;
  font-size:15px;
}
.nav a:hover{
  color:var(--text);
  background:var(--glass);
  transform:translateY(-1px);
  box-shadow: var(--shadow-2);
}
.nav a.cta{
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--accent);
  padding:8px 12px;
}
.nav a[aria-current="page"], .nav a.active {
  color:var(--accent);
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 12%, transparent), color-mix(in srgb, var(--accent-2) 6%, transparent));
  box-shadow: 0 6px 18px rgba(14,165,255,0.08);
}

/* hero */
.hero{
  padding:56px 0;
  background:transparent;
}
.hero-inner{
  max-width:880px;
  padding:24px 0;
}
.hero h1{
  font-size:40px;
  margin:0 0 10px 0;
  letter-spacing:-0.02em;
}
.tagline{
  color:var(--muted);
  font-size:18px;
  margin-bottom:18px;
}

/* buttons */
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  background:linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 85%, black 15%));
  color:white;
  padding:10px 16px;
  border-radius:12px;
  text-decoration:none;
  font-weight:700;
  border:none;
  cursor:pointer;
  transition: transform .14s ease, box-shadow .14s ease, opacity .14s ease;
  box-shadow: 0 8px 24px rgba(14,165,255,0.12);
}
.button:hover{ transform: translateY(-2px); box-shadow: 0 14px 34px rgba(14,165,255,0.14); }
.button.ghost{
  background:transparent;
  color:var(--accent);
  border:1px solid color-mix(in srgb, var(--accent) 18%, transparent);
  box-shadow:none;
}

/* card grid */
.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(240px, 1fr));
  gap:20px;
  margin-top:28px;
}
.card{
  background:linear-gradient(180deg, var(--surface), color-mix(in srgb, var(--surface) 96%, var(--glass) 4%));
  border-radius:12px;
  padding:20px;
  box-shadow: var(--shadow-1);
  border: 1px solid color-mix(in srgb, var(--muted) 6%, transparent);
}

/* about section */
.about{ margin-top:32px;}
.about h2{ margin-bottom:6px; }
.meta{ list-style:none; padding:0; margin:6px 0 24px; color:var(--muted); }

/* forms */
input, textarea, select{
  width:100%;
  padding:12px 14px;
  border-radius:10px;
  border:1px solid color-mix(in srgb, var(--muted) 10%, transparent);
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 98%, white 2%), var(--surface));
  font-size:15px;
  color:var(--text);
  outline: none;
  transition: box-shadow .12s ease, border-color .12s ease;
}
input:focus, textarea:focus, select:focus{
  box-shadow: 0 6px 18px rgba(14,165,255,0.08);
  border-color: color-mix(in srgb, var(--accent) 60%, var(--muted));
}

/* small helpers */
.muted{ color:var(--muted); font-size:14px; }
.site-footer{
  border-top:1px solid color-mix(in srgb, var(--muted) 6%, transparent);
  padding:18px 0;
  margin-top:40px;
  background:transparent;
}
.site-footer .wrap{ display:flex; justify-content:space-between; align-items:center; gap:12px; }
.site-footer a{ color:var(--muted); text-decoration:none; font-weight:600; }

/* responsiveness */
@media(max-width:880px){
  .site-header .wrap{ padding-left:16px; padding-right:16px; }
  .hero h1{ font-size:32px; }
  .nav{ gap:10px; }
  .cards{ grid-template-columns: repeat( auto-fit, minmax(200px, 1fr) ); }
}

/* accessibility focus */
a:focus, button:focus, input:focus, textarea:focus{
  outline: 3px solid color-mix(in srgb, var(--accent) 12%, transparent);
  outline-offset: 3px;
}

/* subtle page footer micro copy */
.footer-note{ font-size:13px; color:var(--muted); margin-top:8px; }

/* small print / narrow container helper for privacy page */
.wrap.narrow{ max-width:820px; margin: 0 auto; padding: var(--gutter); background: transparent; }

/* logo small-screen tweak */
@media(max-width:520px){
  .logo{ font-size:16px; }
  .nav a.cta{ display:none; } /* hide CTA on tiny screens to save space, optional */
}