/**
 * A9.3 — Guided walkthrough chrome. Outside #sanctum-canvas-root.
 * No inline styles (CSP style-src 'self').
 */

.wt-body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 400px) minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr);
  grid-template-areas:
    "top top"
    "narration stage";
  background: var(--canvas-surface-page, #f6f7f9);
  color: var(--canvas-text, #1a1a1a);
  font-family: var(--canvas-font-sans, system-ui, sans-serif);
  height: 100vh;
  /* clip, not hidden: hidden is still a scroll container, and scrollIntoView
     (or anything like it) will move the guide column out of the viewport. */
  overflow: clip;
}

.wt-skip {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  z-index: 1000;
  padding: 0.45rem 0.75rem;
  border-radius: 6px;
  background: var(--canvas-accent, #3b6ced);
  color: #fff;
  font-size: 0.85rem;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.12s ease;
}

.wt-skip:focus,
.wt-skip:focus-visible {
  transform: translateY(0);
  outline: 3px solid var(--canvas-focus-ring, #1a4fd8);
  outline-offset: 2px;
}

.wt-top :focus-visible,
.wt-narration :focus-visible {
  outline: 2px solid var(--canvas-focus-ring, #3b6ced);
  outline-offset: 2px;
}

/* ---- top bar ---- */

.wt-top {
  grid-area: top;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 1.1rem;
  background: var(--canvas-surface-raised, #fff);
  border-bottom: 1px solid var(--canvas-border, #d8dde6);
}

.wt-top__left {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  min-width: 0;
}

.wt-home {
  color: var(--canvas-accent, #3b6ced);
  text-decoration: none;
  font-size: 0.9rem;
  white-space: nowrap;
}

.wt-top__title {
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
}

.wt-top__sub {
  color: var(--canvas-text-muted, #5b6472);
  font-size: 0.88rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wt-top__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 0 1 460px;
  min-width: 0;
}

.wt-progress {
  flex: 1 1 140px;
  height: 6px;
  border-radius: 999px;
  background: var(--canvas-surface-sunk, #e6eaf0);
  overflow: hidden;
}

.wt-progress__bar {
  height: 100%;
  width: 0;
  background: var(--canvas-accent, #3b6ced);
  transition: width 0.25s ease;
}

.wt-dots {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.wt-dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--canvas-border, #c9d0db);
  background: var(--canvas-surface-raised, #fff);
  cursor: pointer;
}

.wt-dot.is-done {
  background: #b9c8f5;
  border-color: #b9c8f5;
}

.wt-dot.is-current {
  background: var(--canvas-accent, #3b6ced);
  border-color: var(--canvas-accent, #3b6ced);
  transform: scale(1.25);
}

/* ---- narration column ---- */

.wt-narration {
  grid-area: narration;
  padding: 1.1rem 1.25rem 1.5rem;
  overflow: auto;
  background: var(--canvas-surface-raised, #fff);
  border-right: 1px solid var(--canvas-border, #d8dde6);
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.wt-counter {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--canvas-text-muted, #5b6472);
}

.wt-actor {
  margin: 0;
  display: inline-block;
  align-self: flex-start;
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--canvas-surface-sunk, #eef1f5);
  color: var(--canvas-text-muted, #5b6472);
}

.wt-actor[data-actor="you"],
.wt-actor[data-actor^="you-"] {
  background: #e3f2e6;
  color: #1c6b31;
}

.wt-actor[data-actor="assistant"],
.wt-actor[data-actor^="assistant-"] {
  background: #e7edfd;
  color: #2a4fbf;
}

.wt-title {
  margin: 0.1rem 0 0.2rem;
  font-size: 1.35rem;
  line-height: 1.25;
}

.wt-says p {
  margin: 0 0 0.65rem;
  font-size: 0.97rem;
  line-height: 1.55;
}

.wt-block {
  border-top: 1px solid var(--canvas-border, #e3e7ee);
  padding-top: 0.6rem;
}

.wt-block__label {
  margin: 0 0 0.3rem;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--canvas-text-muted, #5b6472);
}

.wt-why {
  margin: 0;
  font-size: 0.92rem;
  padding: 0.55rem 0.7rem;
  border-left: 3px solid var(--canvas-accent, #3b6ced);
  background: #f3f6ff;
  border-radius: 0 6px 6px 0;
}

.wt-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.wt-links {
  margin: 0;
  padding: 0 0 0 1.1rem;
  font-size: 0.92rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.wt-links a {
  color: var(--canvas-accent, #3b6ced);
}

.wt-links a:focus-visible {
  outline: 2px solid var(--canvas-focus-ring, #3b6ced);
  outline-offset: 2px;
}

.wt-chip {
  font-family: var(--canvas-font-mono, ui-monospace, monospace);
  font-size: 0.76rem;
  padding: 0.12rem 0.5rem;
  border-radius: 999px;
  background: var(--canvas-surface-sunk, #eef1f5);
  border: 1px solid var(--canvas-border, #dde2ea);
}

.wt-program {
  margin: 0;
  padding: 0.6rem 0.7rem;
  font-family: var(--canvas-font-mono, ui-monospace, monospace);
  font-size: 0.76rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  background: #1f2430;
  color: #e6e9f0;
  border-radius: 8px;
  max-height: 220px;
  overflow: auto;
}

.wt-hint {
  margin: 0;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  background: #fff6db;
  border: 1px solid #f1d98a;
  color: #5b4300;
  font-size: 0.92rem;
}

.wt-controls {
  position: sticky;
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding: 0.75rem 0 0.25rem;
  margin-top: auto;
  background: var(--canvas-surface-raised, #fff);
  border-top: 1px solid var(--canvas-border, #e3e7ee);
}

.wt-btn {
  padding: 0.5rem 0.95rem;
  border-radius: 8px;
  border: 1px solid var(--canvas-border, #c9d0db);
  background: var(--canvas-surface-raised, #fff);
  color: var(--canvas-text, #1a1a1a);
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
}

.wt-btn:hover:not(:disabled) {
  border-color: var(--canvas-accent, #3b6ced);
}

.wt-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.wt-btn--primary {
  background: var(--canvas-accent, #3b6ced);
  border-color: var(--canvas-accent, #3b6ced);
  color: #fff;
  font-weight: 600;
  min-width: 6.5rem;
}

.wt-btn--muted {
  color: var(--canvas-text-muted, #5b6472);
}

.wt-btn[aria-pressed="true"] {
  background: #e7edfd;
  border-color: var(--canvas-accent, #3b6ced);
}

.wt-status {
  font-size: 0.8rem;
  color: var(--canvas-text-muted, #5b6472);
}

.wt-keys {
  margin: 0;
  font-size: 0.76rem;
  color: var(--canvas-text-muted, #5b6472);
}

/* ---- stage: chat strip + canvas ---- */

.wt-stage {
  grid-area: stage;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 0;
  min-width: 0;
}

.wt-chat {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.75rem 1.25rem 0.5rem;
  max-height: 170px;
  overflow: auto;
  background: var(--canvas-surface-page, #f6f7f9);
  border-bottom: 1px solid var(--canvas-border, #e3e7ee);
}

.wt-chat:empty {
  padding: 0;
  border-bottom: 0;
  max-height: 0;
}

.wt-bubble {
  max-width: 68ch;
  padding: 0.5rem 0.8rem;
  border-radius: 14px;
  font-size: 0.92rem;
  line-height: 1.4;
}

.wt-bubble--user {
  align-self: flex-end;
  background: var(--canvas-accent, #3b6ced);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.wt-bubble--assistant {
  align-self: flex-start;
  background: var(--canvas-surface-raised, #fff);
  border: 1px solid var(--canvas-border, #dde2ea);
  border-bottom-left-radius: 4px;
}

.wt-canvas-frame {
  min-height: 0;
  overflow: auto;
  padding: 1.25rem 1.25rem 3rem;
}

.wt-canvas {
  max-width: 880px;
  margin: 0 auto;
  min-height: 240px;
  padding: 1.25rem 1.5rem 1.5rem;
  background: var(--canvas-surface-raised, #fff);
  border: 1px solid var(--canvas-border, #d8dde6);
  border-radius: 12px;
  box-sizing: border-box;
}

.wt-canvas:empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--canvas-text-muted, #5b6472);
  font-size: 0.95rem;
}

.wt-canvas:empty::after {
  content: "The canvas is empty until the assistant answers.";
}

/* ---- small screens ---- */

@media (max-width: 900px) {
  .wt-body {
    height: auto;
    overflow: visible;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto auto;
    grid-template-areas:
      "top"
      "narration"
      "stage";
  }

  .wt-top {
    flex-wrap: wrap;
  }

  .wt-top__sub {
    display: none;
  }

  .wt-top__right {
    flex: 1 1 100%;
  }

  .wt-narration {
    border-right: 0;
    border-bottom: 1px solid var(--canvas-border, #d8dde6);
    max-height: none;
    overflow: visible;
  }

  .wt-controls {
    position: sticky;
    bottom: 0;
    z-index: 5;
    padding-bottom: 0.6rem;
  }

  .wt-program {
    max-height: 150px;
  }

  .wt-canvas-frame {
    padding: 0.9rem 0.75rem 2rem;
    overflow: visible;
  }

  .wt-canvas {
    padding: 0.9rem 0.9rem 1.1rem;
  }
}