/* ═══════════════════════════════════════════════════════════════
   Cadence Learning Playground — interactive demo styles
   ═══════════════════════════════════════════════════════════════ */

.pg-app {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 30px 80px -40px rgba(20, 60, 92, 0.25);
}

/* ─── Status bar ─── */
.pg-status {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 18px 28px;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}
.pg-status-l { display: flex; align-items: center; gap: 14px; }
.pg-status-r { justify-self: end; }
.pg-track { display: flex; flex-direction: column; gap: 2px; }
.pg-track-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-deep);
}
.pg-track-name {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 500;
  color: var(--navy-deep);
  letter-spacing: -0.01em;
}
.pg-link {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-3);
  letter-spacing: -0.005em;
}
.pg-link:hover { color: var(--navy); }

/* batch progress dots */
.pg-progress { display: flex; gap: 6px; }
.pg-prog-cell {
  width: 28px; height: 6px;
  border-radius: 999px;
  background: var(--paper-3);
  transition: all 0.35s var(--ease);
}
.pg-prog-cell.is-done { background: var(--green); }
.pg-prog-cell.is-now {
  background: var(--navy);
  box-shadow: 0 0 0 3px rgba(20, 60, 92, 0.10);
  width: 36px;
}

/* ─── Layout ─── */
.pg-main {
  display: grid;
  grid-template-columns: 300px 1fr 300px;
  gap: 0;
}
.pg-tutor, .pg-state {
  padding: 28px 24px;
  background: var(--paper);
}
.pg-tutor { border-right: 1px solid var(--line); }
.pg-state { border-left: 1px solid var(--line); display: flex; flex-direction: column; gap: 14px; }

.pg-challenge {
  padding: 36px 36px 28px;
  background:
    linear-gradient(180deg, var(--paper) 0%, var(--paper) 100%);
  position: relative;
}

/* ─── Tutor pane ─── */
.pg-tutor-head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.pg-avatar {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--navy-deep);
  color: var(--green);
  display: grid; place-items: center;
  position: relative;
}
.pg-avatar-dot {
  position: absolute;
  top: -2px; right: -2px;
  width: 9px; height: 9px;
  background: var(--green);
  border: 2px solid var(--paper);
  border-radius: 50%;
}
.pg-avatar-name {
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  color: var(--navy-deep);
  letter-spacing: -0.01em;
}
.pg-avatar-role {
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: -0.005em;
}

.pg-tutor-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-bottom: 18px;
}

/* tutor messages */
.pg-msg {
  position: relative;
  padding: 14px 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 12px;
  animation: msgIn 0.35s var(--ease);
}
@keyframes msgIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}
.pg-msg-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-bottom: 6px;
}
.pg-msg-text {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-2);
}
.pg-msg-answer {
  background: rgba(20, 60, 92, 0.04);
  border-color: rgba(20, 60, 92, 0.12);
}
.pg-msg-answer .pg-msg-tag { color: var(--navy); }
.pg-msg-hint {
  background: rgba(31, 165, 101, 0.06);
  border-color: rgba(31, 165, 101, 0.22);
}

.pg-thinking {
  display: inline-flex; gap: 5px;
  padding: 12px 14px;
  background: var(--paper-2);
  border-radius: 12px;
}
.pg-thinking .dot {
  width: 6px; height: 6px;
  background: var(--ink-4);
  border-radius: 50%;
  animation: thinkBlink 1.2s ease-in-out infinite;
}
.pg-thinking .dot:nth-child(2) { animation-delay: 0.2s; }
.pg-thinking .dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes thinkBlink {
  0%, 100% { opacity: 0.3; transform: translateY(0); }
  50%      { opacity: 1; transform: translateY(-3px); }
}

.pg-hint-btn {
  margin-top: 6px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--green-deep);
  background: var(--green-soft);
  border-radius: 999px;
  letter-spacing: -0.005em;
  transition: background 0.2s;
}
.pg-hint-btn:hover { background: rgba(31, 165, 101, 0.30); }
.pg-hint-btn span {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--green);
  color: var(--paper);
  font-size: 14px;
  display: grid; place-items: center;
  line-height: 1;
}

/* ─── Challenge pane ─── */
.pg-task-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-bottom: 12px;
}
.pg-task-q {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 500;
  color: var(--navy-deep);
  letter-spacing: -0.018em;
  line-height: 1.2;
  margin-bottom: 28px;
}
.pg-task-q em {
  color: var(--green-deep);
  font-style: italic;
}

.pg-base-row {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 28px;
  padding: 14px;
  background: var(--paper-2);
  border-radius: 12px;
  border: 1px solid var(--line);
}
.pg-base-swatch {
  width: 64px; height: 64px;
  border-radius: 14px;
  position: relative;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.08), 0 6px 18px -8px rgba(0,0,0,0.2);
}
.pg-base-tick {
  position: absolute;
  bottom: 8px; left: 8px;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.85);
}
.pg-base-name {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 500;
  color: var(--navy-deep);
  letter-spacing: -0.01em;
}
.pg-base-sub {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-4);
  letter-spacing: 0.04em;
  margin-top: 4px;
}

/* options */
.pg-options {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
}
.pg-options[data-count="3"] { grid-template-columns: repeat(3, 1fr); }
.pg-options[data-count="4"] { grid-template-columns: repeat(4, 1fr); }
.pg-options[data-count="5"] { grid-template-columns: repeat(5, 1fr); }
.pg-options[data-count="6"] { grid-template-columns: repeat(6, 1fr); }

.pg-opt {
  position: relative;
  aspect-ratio: 1 / 1.05;
  border-radius: 14px;
  border: 2px solid transparent;
  background: var(--c);
  overflow: hidden;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), border-color 0.2s, opacity 0.2s;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.08), 0 4px 16px -8px rgba(0,0,0,0.12);
}
.pg-opt:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.12), 0 14px 28px -10px rgba(0,0,0,0.22);
}
.pg-opt-fill {
  position: absolute; inset: 0;
  background: var(--c);
}
.pg-opt-mark {
  position: relative;
  z-index: 2;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  display: grid; place-items: center;
  color: var(--navy-deep);
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.pg-opt.is-correct .pg-opt-mark,
.pg-opt.is-revealed .pg-opt-mark {
  opacity: 1; transform: none;
  color: var(--green-deep);
}
.pg-opt.is-wrong .pg-opt-mark {
  opacity: 1; transform: none;
  color: #C2473C;
}
.pg-opt.is-correct { border-color: rgba(255,255,255,0.85); animation: optBounce 0.45s var(--ease); }
.pg-opt.is-wrong   { border-color: rgba(255,255,255,0.85); animation: optShake 0.45s var(--ease); }
.pg-opt.is-revealed { border-color: rgba(255,255,255,0.85); }
@keyframes optBounce {
  0% { transform: scale(1); } 40% { transform: scale(1.08); } 100% { transform: scale(1); }
}
@keyframes optShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}
.pg-opt-deg {
  position: absolute;
  bottom: 8px; right: 10px;
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.04em;
  z-index: 2;
  text-shadow: 0 1px 1px rgba(0,0,0,0.25);
}
.pg-opt:disabled { cursor: default; opacity: 0.92; }

.pg-feedback {
  margin-top: 22px;
  min-height: 22px;
}
.pg-fb {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 6px 12px;
  border-radius: 999px;
  animation: msgIn 0.3s var(--ease);
}
.pg-fb-c { background: var(--green-soft); color: var(--green-deep); }
.pg-fb-w { background: rgba(194, 71, 60, 0.12); color: #A03C32; }

/* ─── Live state pane ─── */
.pg-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 16px;
}
.pg-card-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.pg-card-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.pg-card-num {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 600;
  color: var(--navy-deep);
  letter-spacing: -0.02em;
  line-height: 1;
}
.pg-card-foot {
  margin-top: 10px;
  font-size: 11.5px;
  color: var(--ink-4);
  letter-spacing: -0.005em;
}

.pg-bar {
  height: 8px;
  background: var(--paper-3);
  border-radius: 999px;
  overflow: hidden;
}
.pg-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green) 0%, var(--green-deep) 100%);
  border-radius: 999px;
  transition: width 0.7s var(--ease);
}

/* difficulty meter */
.pg-meter-track {
  position: relative;
  height: 24px;
}
.pg-meter-zone {
  position: absolute;
  left: 30%; right: 0; top: 9px;
  height: 6px;
  background: linear-gradient(90deg, rgba(31, 165, 101, 0.15), rgba(31, 165, 101, 0.4) 50%, rgba(31, 165, 101, 0.15));
  border-radius: 999px;
}
.pg-meter-skill, .pg-meter-chal {
  position: absolute;
  top: 0; bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  transition: left 0.6s var(--ease);
}
.pg-meter-skill { background: var(--ink-3); }
.pg-meter-chal  { background: var(--green); }
.pg-meter-skill span, .pg-meter-chal span {
  position: absolute;
  top: -4px; left: 50%;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--ink-3);
  border: 2px solid var(--paper);
  transform: translateX(-50%);
}
.pg-meter-chal span { background: var(--green); }
.pg-meter-legend {
  display: flex; justify-content: space-between;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.02em;
}
.lg-skill { color: var(--ink-3); }
.lg-chal { color: var(--green-deep); }

/* flow chart */
.pg-card-flow { padding-bottom: 16px; }
.pg-flow-pill {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--flow);
  color: var(--paper);
}
.pg-flow-chart {
  position: relative;
  height: 110px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 6px;
}
.pg-flow-chart svg { width: 100%; height: 100%; display: block; }
.pg-flow-axis {
  position: absolute;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.10em;
  color: var(--ink-4);
}
.pg-flow-axis-x { bottom: 4px; right: 8px; }
.pg-flow-axis-y { top: 4px; left: 6px; transform: rotate(0deg); }
.pg-flow-pin {
  position: absolute;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--green);
  border: 2px solid var(--paper);
  transform: translate(-50%, 50%);
  transition: left 0.6s var(--ease), bottom 0.6s var(--ease), background 0.4s;
  box-shadow: 0 0 0 4px rgba(31, 165, 101, 0.18);
}

/* CL row */
.pg-cl-row { display: flex; gap: 4px; }
.pg-cl-cell {
  flex: 1;
  height: 18px;
  border-radius: 4px;
  background: var(--paper-3);
  position: relative;
  overflow: hidden;
}
.pg-cl-cell.is-done {
  background: var(--green);
}
.pg-cl-cell.is-now {
  background: var(--navy);
}
.pg-cl-cell.is-now::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: clShim 1.6s linear infinite;
}
@keyframes clShim {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%); }
}

/* ─── Footer ─── */
.pg-foot {
  padding: 14px 28px;
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-3);
  display: flex; align-items: center; justify-content: space-between;
}
.pg-foot em { color: var(--green-deep); font-style: italic; }
.pg-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-deep);
  padding: 3px 10px;
  background: var(--green-soft);
  border-radius: 999px;
  margin-right: 8px;
}

/* ─── Picker ─── */
.pg-app-picker { padding: 60px 36px; }
.pg-picker-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.pg-picker-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-deep);
  display: inline-block;
  margin-bottom: 18px;
}
.pg-picker-title {
  font-family: var(--display);
  font-size: 34px;
  font-weight: 500;
  color: var(--navy-deep);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 14px;
}
.pg-picker-title em { color: var(--green-deep); font-style: italic; }
.pg-picker-sub {
  font-size: 15px;
  color: var(--ink-3);
  line-height: 1.6;
}
.pg-picker-sub strong { color: var(--navy); font-weight: 600; }

.pg-picker-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 920px;
  margin: 0 auto;
}
.pg-track-card {
  text-align: left;
  padding: 28px 24px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: all 0.3s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 200px;
  position: relative;
}
.pg-track-card:not(.is-locked):hover {
  background: var(--paper);
  border-color: var(--green);
  transform: translateY(-3px);
  box-shadow: 0 24px 50px -28px rgba(20, 60, 92, 0.22);
}
.pg-track-card.is-locked { opacity: 0.55; cursor: not-allowed; }
.pg-track-card-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green-deep);
}
.pg-track-card-name {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 500;
  color: var(--navy-deep);
  letter-spacing: -0.018em;
}
.pg-track-card-desc {
  font-size: 13.5px;
  color: var(--ink-3);
  line-height: 1.55;
  flex: 1;
}
.pg-track-card-foot {
  font-family: var(--display);
  font-size: 13px;
  font-weight: 500;
  color: var(--navy);
  margin-top: 10px;
}

/* ─── Done ─── */
.pg-app-done { padding: 80px 36px; }
.pg-done-card {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.pg-done-mark {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green-deep);
  display: grid; place-items: center;
  margin: 0 auto 24px;
  animation: optBounce 0.5s var(--ease);
}
.pg-done-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 36px 0 32px;
}
.pg-done-stat {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 12px;
}
.pg-done-stat .num {
  font-family: var(--display);
  font-size: 28px;
  font-weight: 600;
  color: var(--navy-deep);
  letter-spacing: -0.025em;
  line-height: 1;
}
.pg-done-stat .lbl {
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.pg-done-actions {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}

/* ─── Responsive ─── */
@media (max-width: 1100px) {
  .pg-main { grid-template-columns: 1fr; }
  .pg-tutor, .pg-state { border-right: 0; border-left: 0; border-top: 1px solid var(--line); }
  .pg-state { border-top: 1px solid var(--line); }
  .pg-status { grid-template-columns: 1fr; gap: 14px; text-align: left; }
  .pg-status-c { justify-self: start; }
  .pg-status-r { justify-self: start; }
  .pg-picker-grid { grid-template-columns: 1fr; }
  .pg-done-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .pg-app-picker { padding: 40px 22px; }
  .pg-challenge { padding: 24px 22px; }
  .pg-tutor, .pg-state { padding: 22px 22px; }
  .pg-task-q { font-size: 22px; }
  .pg-options[data-count="5"], .pg-options[data-count="6"] { grid-template-columns: repeat(3, 1fr); }
}