:root {
  --exp-bar-height: 60px;
  --exp-bg: #0f172a;
  --exp-text: #f8fafc;
  --exp-accent: #3b82f6;
  --exp-success: #10b981;
  --exp-error: #ef4444;
}

body.experiment-active {
  padding-top: var(--exp-bar-height);
}

body.experiment-active header.page-header {
  margin-top: 0;
}

#expBar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--exp-bar-height);
  background: var(--exp-bg);
  color: var(--exp-text);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  font-family: "Inter", sans-serif;
}

.exp-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.exp-task-id {
  background: var(--exp-accent);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-weight: bold;
  font-size: 0.9rem;
}

.exp-timer {
  font-family: monospace;
  font-size: 1.4rem;
  font-weight: bold;
  color: #fbbf24;
  min-width: 80px;
}

.exp-actions {
  display: flex;
  gap: 1rem;
}

.exp-btn {
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: 0.2s;
}

.exp-btn-info {
  background: #334155;
  color: white;
}

.exp-btn-validate {
  background: var(--exp-success);
  color: white;
}

.exp-btn:hover {
  opacity: 0.9;
}

.exp-btn:disabled {
  background: #64748b;
  cursor: not-allowed;
}

#expDrawer {
  position: fixed;
  top: var(--exp-bar-height);
  right: 0;
  bottom: 0;

  width: clamp(320px, 35vw, 520px);
  background: white;
  box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
  z-index: 9999;

  transform: translateX(110%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  display: flex;
  flex-direction: column;
  border-left: 1px solid #e2e8f0;
}

#expDrawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 1.5rem;
  border-bottom: 1px solid #e2e8f0;
  background: #f8fafc;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: #1e293b;
}

.close-drawer {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #64748b;
  line-height: 1;
}

.drawer-content {
  padding: 2rem;
  overflow-y: auto;
  overflow-x: hidden;

  color: #334155;
  line-height: 1.6;
  font-size: 1rem;

  /* aggressive wrap for long words/URLs */
  overflow-wrap: anywhere;
  word-break: break-word;
}

.drawer-content * {
  max-width: 100%;
}

.drawer-content h3 {
  color: #1e293b;
  margin-top: 0;
}

.drawer-content ul {
  padding-left: 1.2rem;
}

.drawer-content li {
  margin-bottom: 0.5rem;
}

.drawer-content a {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.drawer-content pre,
.drawer-content code {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  max-width: 100%;
}

.validation-toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: #ef4444;
  color: white;
  padding: 1rem 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 10001;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translate(-50%, -20px);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

.exp-study-code {
  padding: 0.25rem 0.55rem;
  border: 1px solid #64748b;
  border-radius: 999px;
  color: #e2e8f0;
  font-family: monospace;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.exp-operator-label {
  align-self: center;
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.exp-btn-danger {
  background: #b91c1c;
  color: white;
}

.exp-timer.is-paused {
  color: #f8fafc;
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.exp-pause-overlay {
  position: fixed;
  inset: var(--exp-bar-height) 0 0;
  z-index: 10002;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.96);
  backdrop-filter: blur(6px);
}

.exp-pause-overlay[hidden] {
  display: none;
}

.exp-pause-card {
  width: min(100%, 560px);
  padding: 2rem;
  color: #f8fafc;
  background: #1e293b;
  border: 1px solid #475569;
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  text-align: center;
}

.exp-pause-card h2 {
  margin: 0.75rem 0;
  font-size: 1.7rem;
}

.exp-pause-card p {
  margin: 0 0 1.5rem;
  color: #cbd5e1;
  line-height: 1.6;
}

.exp-pause-icon {
  display: inline-grid;
  width: 54px;
  height: 54px;
  place-items: center;
  color: #0f172a;
  background: #fbbf24;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 900;
}

.exp-pause-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.validation-toast--success {
  background: #047857;
}

.validation-toast--warning {
  background: #b45309;
}

.validation-toast--info {
  background: #2563eb;
}

@media (max-width: 1050px) {
  :root { --exp-bar-height: 112px; }
  #expBar {
    flex-wrap: wrap;
    gap: 0.4rem 0.75rem;
    padding: 0.55rem 0.75rem;
  }
  .exp-info,
  .exp-actions {
    gap: 0.45rem;
    flex-wrap: wrap;
  }
  .exp-operator-label {
    display: none;
  }
  .exp-btn {
    padding: 0.4rem 0.65rem;
    font-size: 0.8rem;
  }
}

.exp-btn-operator:not(:disabled) {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.exp-operator-dialog {
  position: fixed;
  inset: 0;
  z-index: 10020;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.72);
  backdrop-filter: blur(5px);
}

.exp-operator-dialog[hidden] {
  display: none;
}

.exp-operator-card {
  width: min(100%, 430px);
  padding: 1.75rem;
  color: #0f172a;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.4);
}

.exp-operator-card h2 {
  margin: 0.7rem 0 0.35rem;
  font-size: 1.45rem;
}

.exp-operator-card p {
  margin: 0 0 1rem;
  color: #475569;
  line-height: 1.5;
}

.exp-operator-card label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 700;
}

.exp-operator-card input {
  width: 100%;
  box-sizing: border-box;
  padding: 0.75rem 0.85rem;
  color: #0f172a;
  background: #ffffff;
  border: 1px solid #94a3b8;
  border-radius: 8px;
  font: inherit;
}

.exp-operator-card input:focus {
  border-color: #2563eb;
  outline: 3px solid rgba(37, 99, 235, 0.2);
}

.exp-operator-lock {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  background: #dbeafe;
  border-radius: 50%;
  font-size: 1.25rem;
}

.exp-operator-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.exp-operator-error {
  margin-top: 0.55rem !important;
  color: #b91c1c !important;
  font-weight: 700;
}