/* xvvx.ai — subtle red/white/blue, minimalist, responsive, dark-mode aware */

:root{
  /* base */
  --bg: #fafbfc;
  --text: #0d141c;
  --muted: #6b7280;
  --card: #ffffffcc;
  --shadow: 0 10px 30px -12px rgba(0,0,0,.15);

  /* palette (pastel/faded) */
  --red:   #eeb7b7; /* soft rose */
  --white: #ffffff;
  --blue:  #c7d8f8; /* powder blue */
  --brand: #3a567a; /* muted navy */

  /* gradients */
  --grad-a: var(--red);
  --grad-b: var(--white);
  --grad-c: var(--blue);
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b0f15;
    --text: #e9f0f7;
    --muted: #9aa6b2;
    --card: #0f141acc;
    --shadow: 0 10px 30px -14px rgba(0,0,0,.7);

    --red:   #b77d7d; /* deeper, still soft */
    --white: #12161c;
    --blue:  #7f9bcf;
    --brand: #7ea0c9;

    --grad-a: color-mix(in oklab, var(--red) 85%, #000 15%);
    --grad-b: color-mix(in oklab, var(--white) 85%, #000 15%);
    --grad-c: color-mix(in oklab, var(--blue) 85%, #000 15%);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin: 0;
  font: 16px/1.5 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
       Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 15% -10%, var(--red) 0%, transparent 60%),
    radial-gradient(900px 520px at 110% 10%, var(--blue) 0%, transparent 60%),
    radial-gradient(800px 420px at 50% 120%, color-mix(in oklab, var(--white) 65%, transparent) 0%, transparent 70%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* layout */
.site-header, .site-footer{
  max-width: min(1120px, 92vw);
  margin: 18px auto;
  display: flex; align-items: center; justify-content: space-between;
}
main { max-width: min(1120px, 92vw); margin: 6vh auto 8vh; }

/* brand */
.brand { display:flex; align-items:center; gap:.6rem; text-decoration:none; color:inherit; }
.logo-flag{
  width: 16px; height: 16px; border-radius: 3px;
  background:
    linear-gradient(90deg, var(--red) 0 33.33%, var(--white) 33.33% 66.66%, var(--blue) 66.66% 100%);
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--blue) 16%, transparent);
}
.logo-flag.sm{ width: 12px; height: 12px; box-shadow: none; }
.brand-word { font-weight: 700; letter-spacing: .2px; }
.brand-word .muted { color: var(--muted); font-weight: 600; }

/* nav */
.nav-link { color: var(--muted); text-decoration: none; border-bottom: 1px solid transparent; }
.nav-link:hover { border-color: color-mix(in oklab, var(--muted) 35%, transparent); }

/* hero */
.hero { padding: 12vh 0 8vh; position: relative; }
.hero-title{
  font-size: clamp(36px, 8vw, 88px);
  line-height: 1.02; margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.grad{
  background: linear-gradient(120deg, var(--red), var(--white), var(--blue));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub{
  margin: 0 0 28px; color: var(--muted);
  font-size: clamp(16px, 2.4vw, 20px);
}
.br-hide-sm{ display:none; }
@media (min-width:600px){ .br-hide-sm{ display:inline; } }

.cta-row{ display:flex; gap:12px; flex-wrap:wrap; }
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding: 12px 18px; border-radius: 12px; text-decoration:none; font-weight: 600;
  border: 1px solid color-mix(in oklab, var(--brand) 24%, transparent);
  transition: transform .12s ease, box-shadow .12s ease, background .2s ease;
}
.btn.primary{
  background:
    linear-gradient(135deg,
      color-mix(in oklab, var(--blue) 28%, var(--white) 72%),
      color-mix(in oklab, var(--red) 20%, var(--white) 80%)
    );
  color: var(--text);
  box-shadow: var(--shadow);
}
.btn.primary:hover{ transform: translateY(-1px); }
.btn.ghost{
  background: transparent; color: var(--text);
}
.btn.ghost:hover{ background: color-mix(in oklab, var(--blue) 16%, transparent); }

/* soft note card */
.note{
  margin-top: 12vh; padding: 28px;
  border-radius: 18px; background: var(--card);
  box-shadow: var(--shadow); backdrop-filter: blur(6px);
}
.note-title{ margin:0 0 6px; font-size: clamp(18px, 2.2vw, 22px); }
.note-text{ margin:0; color: var(--muted); }

/* ornament */
.bg-ornament{
  position:absolute; inset:auto -10% -20% -10%; height:240px; pointer-events:none;
  background:
    radial-gradient(closest-side, color-mix(in oklab, var(--red) 35%, transparent), transparent);
  filter: blur(18px) saturate(115%); opacity:.35;
}

/* footer */
.site-footer{ margin-top: 8vh; font-size: 14px; color: var(--muted); gap:12px; }
.foot-left, .foot-right{ display:flex; align-items:center; gap:10px; }
.foot-link{ color: inherit; text-decoration: none; border-bottom:1px dashed color-mix(in oklab, var(--muted) 30%, transparent); }
.foot-link:hover{ border-bottom-color: var(--muted); }
.sep{ opacity:.5; }
.foot-dim{ opacity:.8; }