.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 10px;
}

.panel-heading {
  flex: 1;
  min-width: 0;
}

.instruction-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding: 9px 14px;
  border: none;
  border-radius: 10px;
  background: #fff3e8;
  box-shadow: none;
  -webkit-appearance: none;
  appearance: none;
  color: #9a4f10;
  font-size: clamp(11px, 1.05vw, 15px);
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.instruction-btn::before {
  content: "?";
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid currentColor;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
  box-sizing: border-box;
}

.instruction-btn:hover {
  background: #ffe8d2;
  color: #7f3f0b;
}

.instruction-btn:focus-visible {
  outline: 2px solid rgba(201, 125, 46, 0.4);
  outline-offset: 3px;
  border-radius: 4px;
}

.instruction-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(31, 46, 35, 0.26);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.instruction-modal.open {
  display: flex;
}

.instruction-modal-card {
  width: min(860px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  overflow: auto;
  padding: 42px 48px;
  border: 1px solid rgba(106, 133, 99, 0.18);
  border-radius: 30px;
  background: #ffffff;
  box-shadow: 0 30px 60px rgba(29, 48, 35, 0.2);
}

.instruction-modal-card h3 {
  margin: 0 0 20px;
  color: #1f3026;
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.12;
}

.instruction-copy {
  color: #374943;
  font-size: 18px;
  line-height: 1.8;
}

.instruction-copy p {
  margin: 0;
}

.instruction-copy p + p {
  margin-top: 14px;
}

.instruction-copy ul,
.instruction-copy ol {
  margin: 0;
  padding-left: 28px;
}

.instruction-copy li + li {
  margin-top: 10px;
}

.instruction-copy .instruction-note {
  margin-top: 18px;
}

.instruction-modal-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 28px;
}

.instruction-modal-actions button {
  padding: 12px 24px;
  border: 1px solid rgba(111, 143, 103, 0.28);
  border-radius: 999px;
  background: #eef4ed;
  color: #203328;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.instruction-modal-actions button:hover {
  background: #e4efe2;
}

.instruction-copy code {
  padding: 0.08em 0.32em;
  border-radius: 0.4em;
  background: rgba(111, 143, 103, 0.1);
  font-size: 0.92em;
}

body.instruction-modal-open {
  overflow: hidden;
}

@media (max-width: 720px) {
  .panel-header {
    flex-direction: column;
    align-items: stretch;
  }

  .instruction-btn {
    align-self: flex-start;
  }

  .instruction-modal {
    padding: 16px;
  }

  .instruction-modal-card {
    padding: 28px 24px;
    border-radius: 24px;
  }

  .instruction-copy {
    font-size: 16px;
  }
}

@media print {
  .instruction-btn,
  .instruction-modal {
    display: none !important;
  }

  .panel-header {
    display: block;
  }
}