:root {
  --bg: #0b0c10;
  --card: #12141b;
  --text: #e9ecf1;
  --muted: #aab2c0;
  --line: #222633;
  --btn: #1b2130;
  --btn2: #2a3146;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% 0%, #141826, var(--bg));
  color: var(--text);
}

.wrap { max-width: 1000px; margin: 0 auto; padding: 20px; }
.top { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.brand { display: flex; gap: 12px; align-items: center; }
.logo { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,0.03); }
h1 { font-size: 22px; margin: 0; }
.sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.lang { display: flex; gap: 10px; }
.btn {
  background: var(--btn);
  color: var(--text);
  border: 1px solid var(--line);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
}
.btn:hover { background: var(--btn2); }
.btn.active { outline: 2px solid rgba(255,255,255,0.25); }

.card {
  margin-top: 18px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}
.cardTop {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
h2 { margin: 0; font-size: 18px; }
.hint { margin: 6px 0 0; color: var(--muted); font-size: 13px; }

.actions { display: flex; gap: 10px; }
.linkBtn {
  display: inline-block;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--btn);
  border: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}
.linkBtn:hover { background: var(--btn2); }

.viewer { height: min(75vh, 900px); }
.viewer iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

.foot { margin-top: 14px; color: var(--muted); }