.exercise-demo-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 24px;
}

.exercise-demo-modal.hidden {
  display: none;
}

.exercise-demo-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 8, 17, 0.72);
  backdrop-filter: blur(10px);
}

.exercise-demo-panel {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  max-height: min(860px, 92vh);
  overflow: hidden;
  border: 1px solid rgba(110, 159, 194, 0.32);
  border-radius: 26px;
  background:
    linear-gradient(145deg, rgba(14, 23, 42, 0.97), rgba(8, 13, 26, 0.97)),
    #1a2324;
  box-shadow: 0 26px 90px rgba(0, 0, 0, 0.48);
}

.exercise-demo-close {
  position: absolute;
  top: 16px;
  inset-inline-end: 16px;
  z-index: 2;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  color: #bcc6c2;
  background: rgba(32, 43, 44, 0.76);
  cursor: pointer;
  font-size: 28px;
  line-height: 1;
}

.exercise-demo-copy {
  padding: 30px 72px 16px 30px;
}

.exercise-demo-kicker {
  display: inline-flex;
  margin-bottom: 8px;
  color: #7fc8b4;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.exercise-demo-copy h2 {
  margin: 0;
  font-size: clamp(24px, 4vw, 44px);
  line-height: 1.05;
}

.exercise-demo-copy p {
  margin: 10px 0 0;
  color: #9ca3af;
}

.exercise-demo-media {
  display: grid;
  place-items: center;
  min-height: 340px;
  padding: 18px;
  background:
    radial-gradient(circle at 50% 20%, rgba(127, 200, 180, 0.16), transparent 35%),
    rgba(8, 13, 13, 0.48);
}

.exercise-demo-media img {
  display: block;
  max-width: 100%;
  max-height: min(620px, 68vh);
  border-radius: 18px;
  object-fit: contain;
}

.exercise-demo-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .exercise-demo-modal {
    padding: 12px;
  }

  .exercise-demo-panel {
    border-radius: 20px;
  }

  .exercise-demo-copy {
    padding: 24px 58px 12px 18px;
  }

  .exercise-demo-media {
    min-height: 260px;
    padding: 10px;
  }
}