/* Black metallic sheen background with maroon accents and frosted glass */

/* Root tokens (mobile-first) */
:root{
  --bg: #000;                   /* deep black base */
  --card: rgba(255, 255, 255, 0.92); /* frosted glass card */
  --text: #eaeaea;
  --muted: #b07a7a;
  --border: rgba(255,255,255,.16);
  --focus: #ff7a7a;
  --shadow: 0 12px 40px rgba(0,0,0,.45);
  --cta: #b01f28;                /* maroon-red CTA */
  --accent: #ff5a5a;
  --checker-1: rgba(255,0,0,.08);
  --checker-2: rgba(255,255,255,.08);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }

/* Page base (mobile-first) */
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: #000;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow-x: hidden;

  /* lightweight black metallic sheen with subtle checker pattern */
  background-color: #000;
  background-image:
    linear-gradient(135deg, rgba(255,255,255,.08) 25%, transparent 25%),
    linear-gradient(225deg, rgba(255,255,255,.08) 25%, transparent 25%),
    linear-gradient(315deg, rgba(255,255,255,.08) 25%, transparent 25%),
    linear-gradient(45deg, rgba(255,255,255,.08) 25%, transparent 25%);
  background-size: 60px 60px;
  background-position: 0 0, 0 30px, 30px -30px, -30px 0;
  /* subtle metallic sheen across page */
  box-shadow: inset 0 0 120px rgba(0,0,0,.25);
  isolation: isolate;
}

/* Header */
.site-header {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 12px 16px;
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(0,0,0,.55);
  border-bottom: 1px solid rgba(255,255,255,.15);
}
.brand {
  font-weight: 700;
  color: #e6e6e6;
  text-shadow: 0 0 8px rgba(0,0,0,.6);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* Main container */
main {
  width: 100%;
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}

/* Grid helper (mobile-first) */
.grid-layout { display: grid; grid-template-columns: 1fr; gap: 1rem; }

/* Hero block (central donation QR) */
.hero {
  width: min(92%, 860px);
  padding: 2rem;
  border-radius: 16px;
  text-align: center;
  display: grid;
  gap: 1rem;
  background: rgba(10,10,10,.85); /* near-black frosted backdrop will show through */
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,.15);
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
  position: relative;
  overflow: hidden;
  color: #e9e9e9;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: radial-gradient(circle at 40% 20%, rgba(255,0,0,.30), transparent 40%),
              radial-gradient(circle at 70% 60%, rgba(200,0,0,.25), transparent 40%);
  filter: blur(18px);
  z-index: -1;
  animation: sheen 12s linear infinite;
}
@keyframes sheen { 0%,100% { transform: translate3d(0,0,0); } 50% { transform: translate3d(-2px,2px,0); } }

.hero h1 {
  margin: 0;
  font-size: clamp(1.6rem, 2vw + 1rem, 2.8rem);
  color: #f7f7f7;
}
.subhead {
  font-size: clamp(1rem, 0.8vw + 0.8rem, 1.25rem);
  color: #d9c0c0;
  margin: 0;
}
.qr-hero {
  display: grid;
  place-items: center;
  margin-top: 6px;
}
.qr-hero img {
  width: min(72vw, 420px);
  height: auto;
  border-radius: 14px;
  padding: 12px;
  background: rgba(0,0,0,.18);
  border: 1px solid rgba(0,0,0,.15);
  box-shadow: 0 14px 38px rgba(0,0,0,.25);
}
.telegram-link {
  color: #ffdfe0;
  font-size: 1rem;
  margin: 0;
}
.telegram-link a {
  color: #ffd1d1;
  text-decoration: none;
  border-bottom: 1px dotted rgba(0,0,0,.4);
}
.telegram-link a:hover, .telegram-link a:focus { color: #fff; text-decoration: underline; }

/* Footer with small advertisement button-like link */
.site-footer {
  width: 100%;
  padding: 1.1rem 0;
  text-align: center;
  background: rgba(0,0,0,.6);
  color: #e9f3f3;
  border-top: 1px solid rgba(255,255,255,.15);
}
.footer-ad {
  font-size: 0.95rem;
  color: #e9f3f3;
}
.footer-ad a {
  display: inline-block;
  padding: 0.6em 1.0em;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff7a7a, #d94a4a);
  color: #200d0d;
  text-decoration: none;
  border: 1px solid rgba(0,0,0,.15);
  transition: transform .2s ease;
}
.footer-ad a:hover, .footer-ad a:focus {
  transform: translateY(-1px);
  filter: brightness(1.05);
}
.footer-ad a:active { transform: translateY(0); }
.gratitude { margin: 0.5rem 0 0; font-size: 0.92rem; color: #e2ffd6; }

/* Accessibility focus */
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Responsive tweaks */
@media (min-width: 768px) {
  .hero { padding: 2.5rem; }
  .brand { font-size: 1.05rem; }
}
@media (min-width: 1024px) {
  .hero { padding: 3rem; }
  .qr-hero img { width: 420px; }
}