.staffiii-serial-study {
  margin: 22px 0 28px;
  min-width: 0;
  padding: clamp(14px, 2vw, 26px);
  border: 1px solid #9caea8;
  border-radius: 20px;
  background: linear-gradient(150deg, #e9f0ec 0%, #f6f6ef 57%, #edf1ea 100%);
  color: #213d39;
  box-shadow: 0 16px 32px rgba(23, 51, 47, .12);
}

.staffiii-serial-study h3 {
  margin: 4px 0 8px;
  color: #173c38;
  font-size: clamp(1.25rem, 2.1vw, 1.7rem);
}

.staffiii-serial-eyebrow {
  margin: 0;
  color: #236a5e;
  font-size: .73rem;
  font-weight: 850;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.staffiii-serial-intro,
.staffiii-serial-boundary,
.staffiii-serial-source {
  max-width: 88ch;
  line-height: 1.55;
}

.staffiii-serial-intro { margin: 0 0 18px; }

.staffiii-serial-lead {
  display: inline-grid;
  gap: 6px;
  margin-bottom: 16px;
  color: #244a42;
  font-size: .86rem;
  font-weight: 800;
}

.staffiii-serial-lead select {
  min-width: 175px;
  min-height: 42px;
  padding: 8px 11px;
  border: 1px solid #7b9a8e;
  border-radius: 9px;
  background: #fff;
  color: #173e37;
  font: inherit;
}

.staffiii-serial-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 16px;
  min-width: 0;
}

.staffiii-serial-panel {
  min-width: 0;
  margin: 0;
  padding: 13px;
  border: 1px solid #bac4b9;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(39, 58, 52, .08);
}

.staffiii-serial-panel-heading {
  color: #173f3c;
  font-size: .92rem;
  font-weight: 850;
  letter-spacing: .01em;
}

.staffiii-serial-phase {
  min-height: 1.3em;
  margin: 3px 0 10px;
  color: #62736b;
  font-size: .78rem;
  font-weight: 700;
}

.staffiii-serial-study[data-revealed="true"] .staffiii-serial-phase {
  color: #28694f;
}

.staffiii-serial-paper {
  min-width: 0;
  overflow: hidden;
  border: 1px solid #c3988e;
  border-radius: 9px;
  background: #fffaf3;
  box-shadow: inset 0 0 0 4px rgba(237, 222, 205, .7);
}

.staffiii-serial-paper canvas {
  display: block;
  width: 100%;
  height: 248px;
  cursor: crosshair;
  touch-action: pan-y;
}

.staffiii-serial-time-ruler {
  display: flex;
  justify-content: space-between;
  padding: 3px 1px 0;
  color: #705950;
  font: 700 .69rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.staffiii-serial-marker-label {
  display: grid;
  gap: 5px;
  margin-top: 12px;
  color: #24483f;
  font-size: .82rem;
  font-weight: 800;
}

.staffiii-serial-marker-label input {
  width: 100%;
  margin: 2px 0;
  accent-color: #125c93;
}

.staffiii-serial-marker-value {
  color: #496257;
  font: 700 .78rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.staffiii-serial-scale {
  margin: 10px 2px 18px;
  color: #445e55;
  font-size: .81rem;
  line-height: 1.5;
}

.staffiii-serial-text-equivalent {
  max-width: 100%;
  padding: 11px 14px;
  border: 1px solid #c5d2c8;
  border-radius: 11px;
  background: #fff;
  font-size: .84rem;
}

.staffiii-serial-text-equivalent summary {
  color: #1d574b;
  font-weight: 850;
  cursor: pointer;
}

.staffiii-serial-text-summary { max-width: 80ch; line-height: 1.5; }
.staffiii-serial-text-table { width: 100%; border-collapse: collapse; font-size: .78rem; }
.staffiii-serial-text-table caption { margin-bottom: 7px; text-align: left; font-weight: 750; }
.staffiii-serial-text-table th,
.staffiii-serial-text-table td { padding: 7px 5px; border-bottom: 1px solid #dde5df; text-align: left; }
.staffiii-serial-text-table thead th { background: #eef3ef; }

.staffiii-serial-question {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px solid #aebfb5;
  border-radius: 11px;
  background: #f9fbf8;
}

.staffiii-serial-question legend {
  padding: 0 4px;
  color: #244b3f;
  font-weight: 850;
}

.staffiii-serial-question label { min-width: 0; line-height: 1.4; }
.staffiii-serial-question input { accent-color: #205e55; }

.staffiii-serial-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 17px; }
.staffiii-serial-actions button {
  min-height: 43px;
  padding: 8px 14px;
  border: 1px solid #205e55;
  border-radius: 9px;
  background: #205e55;
  color: #fff;
  font: inherit;
  font-size: .85rem;
  font-weight: 800;
  cursor: pointer;
}

.staffiii-serial-actions button:last-child { background: #fff; color: #205e55; }
.staffiii-serial-actions button:disabled { opacity: .52; cursor: not-allowed; }
.staffiii-serial-study select:focus-visible,
.staffiii-serial-study input:focus-visible,
.staffiii-serial-study button:focus-visible,
.staffiii-serial-study summary:focus-visible {
  outline: 3px solid #b76e2d;
  outline-offset: 3px;
}

.staffiii-serial-feedback {
  min-height: 2.4em;
  margin: 12px 0 0;
  line-height: 1.5;
  font-weight: 650;
}

.staffiii-serial-study[data-revealed="true"] .staffiii-serial-feedback {
  padding: 12px 14px;
  border-left: 4px solid #32805e;
  background: #e3efe5;
}

.staffiii-serial-boundary {
  margin: 19px 0 0;
  padding-top: 15px;
  border-top: 1px solid #c5d3ca;
  font-size: .82rem;
}

.staffiii-serial-source { margin: 11px 0 0; color: #50665d; font-size: .79rem; }
.staffiii-serial-source a { color: #1b6475; text-decoration-thickness: 1px; }

@media (max-width: 780px) {
  .staffiii-serial-pair { grid-template-columns: minmax(0, 1fr); }
  .staffiii-serial-actions button { flex: 1 1 155px; }
}

@media (max-width: 390px) {
  .staffiii-serial-panel { padding: 10px; }
  .staffiii-serial-study { padding: 12px; }
  .staffiii-serial-text-table { font-size: .69rem; }
}