.das-conference {
  padding: 55px 0;
}
.conference-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 35px;
}
.conference-intro span {
  color: #ff5a1f;
  font-weight: 900;
}
.conference-intro h1 {
  font-size: clamp(34px, 6vw, 64px);
  margin: 10px;
}
.conference-lobby {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.conference-lobby > div,
.conference-room {
  background: #fff;
  border: 1px solid #dbe3ea;
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 15px 45px #17325a14;
}
.conference-lobby label {
  display: grid;
  gap: 7px;
  margin: 14px 0;
  font-weight: 800;
}
.conference-lobby input {
  padding: 14px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
}
.conference-room > header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 20px;
}
.conference-room > header span {
  display: block;
  color: #64748b;
}
.conference-layout {
  display: grid;
  grid-template-columns: minmax(0, 2.3fr) minmax(260px, 1fr);
  gap: 18px;
}
.video-stage {
  min-height: 480px;
  border-radius: 20px;
  overflow: hidden;
  background: #07172b;
  display: grid;
  place-items: center;
  position: relative;
}
.video-stage video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
}
.video-stage video:not([srcObject]) {
  display: none;
}
#slide-stage {
  background: linear-gradient(135deg, #0b2e66, #146bd1);
  color: #fff;
  width: 80%;
  padding: 50px;
  border-radius: 18px;
  text-align: center;
  z-index: 1;
}
.conference-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.conference-controls button,
.upload-slide,
.conference-room > header button,
.class-chat button,
.join-request button {
  border: 0;
  border-radius: 10px;
  padding: 11px 13px;
  font-weight: 800;
  background: #eef3f8;
  cursor: pointer;
}
.conference-controls .danger {
  background: #ef4444;
  color: #fff;
}
.upload-slide input {
  display: none;
}
.conference-layout aside {
  display: grid;
  gap: 12px;
}
.conference-layout aside > section {
  border: 1px solid #dbe3ea;
  border-radius: 16px;
  padding: 15px;
}
.join-request {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 6px;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid #edf2f7;
}
.join-request span {
  grid-column: 1;
}
.join-request button[data-admit] {
  background: #16a34a;
  color: #fff;
}
.class-chat #chat-messages {
  height: 160px;
  overflow: auto;
  background: #f8fafc;
  padding: 8px;
}
.class-chat form {
  display: flex;
  margin-top: 8px;
}
.class-chat input {
  min-width: 0;
  flex: 1;
  padding: 10px;
  border: 1px solid #cbd5e1;
  border-radius: 9px 0 0 9px;
}
.class-chat button {
  border-radius: 0 9px 9px 0;
  background: #146bd1;
  color: #fff;
}
@media (max-width: 800px) {
  .conference-lobby,
  .conference-layout {
    grid-template-columns: 1fr;
  }
  .conference-room {
    padding: 15px;
  }
  .conference-room > header {
    align-items: flex-start;
    flex-direction: column;
  }
  .video-stage {
    min-height: 330px;
  }
  #slide-stage {
    width: 90%;
    padding: 28px 15px;
  }
  .conference-controls > * {
    flex: 1 1 42%;
    text-align: center;
  }
}
.das-jitsi{padding:55px 0}.jitsi-intro{text-align:center;max-width:850px;margin:0 auto 35px}.jitsi-intro span{color:#146bd1;font-weight:900}.jitsi-intro h1{font-size:clamp(36px,6vw,68px);margin:10px}.jitsi-lobby{display:grid;grid-template-columns:1fr 1fr;gap:24px}.jitsi-lobby>div{background:#fff;border:1px solid #dbe3ea;border-radius:22px;padding:28px;box-shadow:0 15px 45px #17325a14}.jitsi-lobby label{display:grid;gap:7px;margin:14px 0;font-weight:800}.jitsi-lobby input{padding:14px;border:1px solid #cbd5e1;border-radius:10px}.jitsi-room{background:#111827;border-radius:18px;overflow:hidden}.jitsi-room>header{display:flex;align-items:center;gap:10px;padding:12px 16px;color:#fff}.jitsi-room>header div{display:grid;margin-right:auto}.jitsi-room>header span{font-size:12px;color:#aeb9c9}.jitsi-room>header button{border:1px solid #435069;border-radius:8px;background:#273246;color:#fff;padding:9px 12px}.jitsi-room iframe{display:block;width:100%;height:min(78vh,850px);border:0;background:#202631}@media(max-width:760px){.jitsi-lobby{grid-template-columns:1fr}.jitsi-room{margin:0 -16px;border-radius:0}.jitsi-room>header{align-items:flex-start;flex-wrap:wrap}.jitsi-room>header div{width:100%}.jitsi-room iframe{height:75vh}}