:root {
  color-scheme: dark;
}

.playchess-page {
  margin: 0;
  overflow-x: hidden;
  background: #080c14;
  color: #eef3fb;
}

.playchess-main {
  width: min(100%, 1440px);
  margin: 0 auto;
  padding: clamp(12px, 2vw, 28px);
  box-sizing: border-box;
}

.playchess-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: clamp(18px, 3vw, 30px);
  padding: 14px 18px;
  border: 1px solid rgba(255, 183, 77, 0.42);
  border-radius: 12px;
  background: linear-gradient(120deg, rgba(255, 152, 0, 0.16), rgba(74, 158, 255, 0.08));
}

.playchess-banner strong { font-size: 1.05rem; }
.playchess-banner p { margin: 4px 0 0; color: #c7d1df; }
.playchess-banner a,
.playchess-disclosure a,
.playchess-footer a { color: #77b8ff; }
.playchess-banner a { flex: 0 0 auto; font-weight: 700; }

.playchess-heading { margin: 0 auto 18px; text-align: center; }
.playchess-heading h1 { margin: 0 0 8px; font-size: clamp(1.65rem, 3vw, 2.45rem); }
.playchess-heading p { margin: 0; color: #c7d1df; }

.playchess-embed-shell {
  width: 100%;
  height: clamp(560px, calc(100vh - 210px), 900px);
  min-height: 560px;
  overflow: hidden;
  border: 1px solid #26344a;
  border-radius: 12px;
  background: #111827;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
}

.playchess-embed-shell iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.playchess-disclosure {
  max-width: 980px;
  margin: 18px auto 0;
  color: #c7d1df;
  line-height: 1.55;
}

.playchess-disclosure p { margin: 8px 0; }
.playchess-fallback { font-size: 0.9rem; }
.playchess-footer { padding: 22px 16px 32px; text-align: center; color: #9eabba; }
.playchess-footer p { margin: 6px 0; }

@media (max-width: 800px) {
  .playchess-main { padding: 10px; }
  .playchess-banner { align-items: flex-start; flex-direction: column; }
  .playchess-embed-shell { height: max(560px, calc(100dvh - 170px)); min-height: 0; border-radius: 8px; }
}

@media (max-width: 480px) {
  .playchess-embed-shell { height: max(520px, calc(100dvh - 150px)); }
}