/**
 * Discovery UI Component System 1.0 — Phase 3 responsive structural layer.
 * Structure / hierarchy / responsive layout only. Not final AIOVI brand redesign.
 */

:root {
  --discovery-content-max: 52rem;
  --discovery-question-max: 42rem;
  --discovery-gap: 1.25rem;
  --discovery-gap-lg: 1.75rem;
  --discovery-card-pad: clamp(1.1rem, 2.2vw, 1.65rem);
  --discovery-control-min-height: 48px;
  --discovery-touch-min: 44px;
  --discovery-radius: 14px;
  --discovery-border: 1px solid rgba(16, 44, 71, 0.12);
  --discovery-surface: rgba(255, 253, 250, 0.96);
  --discovery-surface-quiet: rgba(246, 248, 249, 0.92);
  --discovery-context-max: 18rem;
}

/* Shell: focused column, question-first composition */
.discovery-shell-surface {
  max-width: var(--discovery-content-max);
}

.discovery-shell-header {
  margin: 0 0 var(--discovery-gap-lg);
}

.discovery-shell-header .eyebrow {
  margin: 0 0 0.35rem;
}

.discovery-shell-header h2 {
  margin-bottom: 0.65rem;
}

.discovery-progress {
  margin: 0;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  color: var(--muted);
  max-width: 28rem;
}

.discovery-shell-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--discovery-gap-lg);
  align-items: start;
}

.discovery-shell-main {
  min-width: 0;
  display: grid;
  gap: var(--discovery-gap);
}

/* MainQuestion card — primary visual surface */
.discovery-question-card {
  margin-top: 0;
  padding: var(--discovery-card-pad);
  border: var(--discovery-border);
  border-radius: var(--discovery-radius);
  background: var(--discovery-surface);
  box-shadow: 0 10px 28px rgba(7, 27, 51, 0.05);
}

/* Beat legacy `.document-section h3` without !important */
.discovery-question-card .discovery-question-title {
  margin: 0 0 var(--discovery-gap);
  max-width: var(--discovery-question-max);
  font-size: clamp(1.45rem, 2.8vw, 2rem);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -0.03em;
  color: var(--navy);
  overflow-wrap: anywhere;
}

/* Supporting prompts — guidance, not fields */
.discovery-supporting-prompts {
  margin: 0 0 var(--discovery-gap-lg);
  max-width: var(--discovery-question-max);
}

.discovery-supporting-prompts:empty {
  display: none;
}

.discovery-supporting-list {
  list-style: none;
  margin: 0;
  padding: 0.85rem 1rem;
  border-left: 3px solid rgba(16, 44, 71, 0.18);
  border-radius: 0 10px 10px 0;
  background: var(--discovery-surface-quiet);
  display: grid;
  gap: 0.55rem;
}

.discovery-supporting-list li {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.discovery-supporting-list li::before {
  content: none;
}

/* Answer + actions */
.discovery-question-form {
  display: grid;
  gap: 0.85rem;
}

.discovery-answer-slot .question-control,
.discovery-answer-slot .discovery-answer-control {
  display: grid;
  gap: 0.5rem;
}

.discovery-answer-control select,
.discovery-answer-control textarea,
.question-control select,
.question-control textarea {
  width: 100%;
  min-height: var(--discovery-control-min-height);
  font: inherit;
  color: var(--navy);
  background: rgba(255, 253, 250, 0.98);
  border: 1px solid #bccad2;
  border-radius: 12px;
  padding: 14px;
  min-width: 0;
}

.discovery-answer-control textarea,
.question-control textarea {
  min-height: 8.5rem;
  resize: vertical;
  line-height: 1.5;
}

.discovery-answer-control select,
.question-control select {
  cursor: pointer;
}

.discovery-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0.35rem 0 0;
  align-items: stretch;
}

.discovery-action-primary,
.discovery-action-secondary {
  min-height: var(--discovery-control-min-height);
  min-width: var(--discovery-touch-min);
  white-space: normal;
}

.discovery-action-primary {
  flex: 1 1 12rem;
}

.discovery-action-secondary {
  flex: 1 1 10rem;
}

.discovery-question-form .discovery-build-hint {
  margin: 0;
  max-width: 40rem;
}

/* OptionGrid readiness (not wired to selects in Phase 3) */
.discovery-option-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: 1fr;
}

.discovery-option-card {
  display: block;
  width: 100%;
  min-height: var(--discovery-control-min-height);
  text-align: left;
  padding: 0.9rem 1rem;
  border: 1px solid #bccad2;
  border-radius: 12px;
  background: rgba(255, 253, 250, 0.98);
  color: var(--navy);
  font: inherit;
  cursor: pointer;
  overflow-wrap: anywhere;
}

.discovery-option-card[aria-checked='true'],
.discovery-option-card.is-selected {
  border-color: rgba(16, 44, 71, 0.45);
  box-shadow: inset 0 0 0 1px rgba(16, 44, 71, 0.25);
}

/* KnownSummary — secondary context below / beside main */
.discovery-shell-context {
  min-width: 0;
}

.discovery-known {
  margin: 0;
  padding: 0.85rem 1rem;
  border: var(--discovery-border);
  border-radius: var(--discovery-radius);
  background: var(--discovery-surface-quiet);
}

.discovery-known > summary {
  cursor: pointer;
  min-height: var(--discovery-touch-min);
  display: flex;
  align-items: center;
  font-weight: 650;
  font-size: 0.92rem;
  color: var(--navy);
  list-style: none;
}

.discovery-known > summary::-webkit-details-marker {
  display: none;
}

.discovery-known .known-summary {
  padding: 0.75rem 0 0.25rem;
}

.discovery-known .known-summary ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.discovery-known .known-summary li {
  margin: 0.35rem 0;
  overflow-wrap: anywhere;
}

.discovery-known .known-summary .muted {
  margin: 0;
  font-size: 0.9rem;
}

/* Completion — intentional empty-plan surface */
.discovery-completion {
  padding: var(--discovery-card-pad);
  border: var(--discovery-border);
  border-radius: var(--discovery-radius);
  background: var(--discovery-surface);
  box-shadow: 0 10px 28px rgba(7, 27, 51, 0.05);
}

.discovery-completion-message {
  margin: 0 0 var(--discovery-gap);
  max-width: var(--discovery-question-max);
  font-size: clamp(1.15rem, 2.2vw, 1.35rem);
  line-height: 1.45;
  color: var(--navy);
  overflow-wrap: anywhere;
}

.discovery-actions--completion .discovery-action-primary {
  flex: 1 1 14rem;
}

/* Wide desktop: optional quiet context column (DOM order still main → context) */
@media (min-width: 1100px) {
  .discovery-shell-layout {
    grid-template-columns: minmax(0, 1fr) minmax(14rem, var(--discovery-context-max));
    gap: 2rem;
  }

  .discovery-shell-context {
    position: sticky;
    /* Below buyer topbar (~72px) and sticky #startOver (~86px) */
    top: 108px;
  }

  .discovery-known {
    background: rgba(246, 248, 249, 0.78);
  }
}

/* Tablet: single column, comfortable controls */
@media (max-width: 1099px) {
  .discovery-shell-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .discovery-shell-context {
    position: static;
  }
}

/* Mobile: question-first stack, full-width actions, touch-safe */
@media (max-width: 680px) {
  :root {
    --discovery-card-pad: 1rem;
    --discovery-gap: 1rem;
    --discovery-gap-lg: 1.25rem;
  }

  .discovery-question-card,
  .discovery-completion,
  .discovery-known {
    border-radius: 12px;
  }

  .discovery-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .discovery-action-primary,
  .discovery-action-secondary {
    width: 100%;
    flex: none;
  }

  .discovery-supporting-list {
    padding: 0.75rem 0.85rem;
  }

  .discovery-question-card .discovery-question-title {
    font-size: clamp(1.35rem, 6.5vw, 1.7rem);
  }

  /* Avoid sticky action conflict with sticky topbar / startOver */
  .discovery-actions {
    position: static;
  }
}

@media (prefers-reduced-motion: reduce) {
  .discovery-question-card,
  .discovery-completion,
  .discovery-known {
    transition: none !important;
  }
}