/* =========================================================
   Course carousel + S01 game — dark terminal theme
   ========================================================= */

:root {
  --c-bg: #0d1117;
  --c-bg-raised: #161b22;
  --c-bg-soft: #1c2128;
  --c-border: #30363d;
  --c-border-soft: #21262d;
  --c-fg: #e6edf3;
  --c-fg-dim: #7d8590;
  --c-fg-faint: #484f58;
  --c-accent: #58a6ff;
  --c-green: #3fb950;
  --c-yellow: #d29922;
  --c-red: #f85149;
  --c-magenta: #bc8cff;
  --c-cyan: #39c5cf;
}

/* ============ CAROUSEL SHELL ============ */
.course-section {
  background: var(--c-bg);
  color: var(--c-fg);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}

.course-section::before {
  /* subtle scanline */
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(88, 166, 255, 0) 0,
    rgba(88, 166, 255, 0) 3px,
    rgba(88, 166, 255, 0.015) 3px,
    rgba(88, 166, 255, 0.015) 4px
  );
  pointer-events: none;
}

.course-inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 56px 20px 48px;
  position: relative;
}

/* ============ HEADER ============ */
.course-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.course-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: var(--c-green);
  text-transform: uppercase;
}

.course-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 8px var(--c-green);
  animation: coursePulse 2s infinite;
}

@keyframes coursePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.course-title {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-fg);
  margin: 6px 0 0;
  line-height: 1.15;
}

.course-sub {
  font-size: 13px;
  color: var(--c-fg-dim);
  margin-top: 4px;
}

.course-ctrl {
  display: flex;
  align-items: center;
  gap: 10px;
}

.course-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  background: var(--c-bg-raised);
  color: var(--c-fg);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
.course-btn:hover { background: var(--c-bg-soft); border-color: var(--c-fg-faint); }
.course-btn:active { transform: translateY(0.5px); }
.course-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.course-counter {
  font-size: 13px;
  color: var(--c-fg-dim);
  font-variant-numeric: tabular-nums;
  min-width: 56px;
  text-align: center;
}

/* ============ VIEWPORT + TRACK ============ */
.course-viewport { overflow: hidden; border-radius: 14px; border: 1px solid var(--c-border); }
.course-track { display: flex; transition: transform 0.55s cubic-bezier(0.2, 0.65, 0.25, 1); }
.course-slide { flex: 0 0 100%; min-width: 0; }

/* ============ SLIDE LAYOUT ============ */
.course-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 380px;
}
@media (max-width: 800px) {
  .course-grid { grid-template-columns: 1fr; }
}

.course-left {
  padding: 32px 36px;
  background: var(--c-bg-raised);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  border-right: 1px solid var(--c-border);
}

@media (max-width: 800px) {
  .course-left { border-right: none; border-bottom: 1px solid var(--c-border); }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(88, 166, 255, 0.1);
  color: var(--c-accent);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid rgba(88, 166, 255, 0.25);
  width: fit-content;
}
.chip.chip-core { background: rgba(63, 185, 80, 0.1); color: var(--c-green); border-color: rgba(63, 185, 80, 0.25); }
.chip.chip-reinforce { background: rgba(210, 153, 34, 0.1); color: var(--c-yellow); border-color: rgba(210, 153, 34, 0.25); }
.chip.chip-runtime { background: rgba(188, 140, 255, 0.1); color: var(--c-magenta); border-color: rgba(188, 140, 255, 0.25); }
.chip.chip-multi { background: rgba(57, 197, 207, 0.1); color: var(--c-cyan); border-color: rgba(57, 197, 207, 0.25); }

.lesson-title {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 4px 0 0;
}

.lesson-tagline {
  color: var(--c-fg-dim);
  font-size: 14px;
  font-family: 'Inter', system-ui, sans-serif;
}

.lesson-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  color: var(--c-fg);
  display: grid;
  gap: 6px;
}
.lesson-bullets li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.lesson-bullets li::before {
  content: "▸";
  color: var(--c-green);
  flex-shrink: 0;
  margin-top: 1px;
}

.lesson-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-play {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-green), #2ea043);
  color: #0d1117;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: 0;
  font-family: inherit;
  box-shadow: 0 0 0 1px rgba(63, 185, 80, 0.5), 0 4px 12px rgba(63, 185, 80, 0.25);
  transition: transform 0.1s, box-shadow 0.1s;
}
.btn-play:hover { transform: translateY(-1px); box-shadow: 0 0 0 1px rgba(63, 185, 80, 0.7), 0 6px 18px rgba(63, 185, 80, 0.35); }
.btn-play:disabled {
  background: var(--c-bg-soft);
  color: var(--c-fg-faint);
  box-shadow: 0 0 0 1px var(--c-border);
  cursor: not-allowed;
  transform: none;
}

.btn-doc {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  color: var(--c-fg);
  font-size: 13px;
  text-decoration: none;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s;
}
.btn-doc:hover { background: var(--c-bg-soft); border-color: var(--c-fg-faint); }

.progress-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 11px;
  color: var(--c-fg-dim);
  padding-top: 14px;
  border-top: 1px dashed var(--c-border);
}

.xp-bar {
  flex: 1;
  height: 4px;
  background: var(--c-border-soft);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}
.xp-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--c-green), var(--c-cyan));
  transition: width 0.5s cubic-bezier(0.2, 0.65, 0.25, 1);
}

/* ============ RIGHT: TERMINAL PREVIEW ============ */
.course-right {
  background: var(--c-bg);
  padding: 20px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
}

.term-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 2px 0 10px;
  border-bottom: 1px solid var(--c-border);
  font-size: 11px;
  color: var(--c-fg-dim);
}
.term-dot { width: 10px; height: 10px; border-radius: 50%; }
.term-dot.red { background: #ff5f57; }
.term-dot.yellow { background: #febc2e; }
.term-dot.green { background: #28c840; }
.term-title { margin-left: 10px; }

.term-body {
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--c-fg);
  flex: 1;
  overflow: hidden;
}

.term-line { display: block; }
.term-prompt { color: var(--c-green); }
.term-path { color: var(--c-accent); }
.term-comment { color: var(--c-fg-dim); font-style: italic; }
.term-token-kw { color: var(--c-magenta); }
.term-token-str { color: var(--c-yellow); }
.term-token-fn { color: var(--c-cyan); }
.term-warn { color: var(--c-red); }
.term-ok { color: var(--c-green); }

.term-typed::after {
  content: "▌";
  color: var(--c-green);
  animation: coursePulse 1s infinite;
}

/* ============ DOTS ============ */
.course-dots {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.course-dot {
  width: 26px;
  height: 4px;
  border-radius: 2px;
  background: var(--c-border);
  cursor: pointer;
  border: 0;
  padding: 0;
  transition: background 0.2s, width 0.25s;
}
.course-dot:hover { background: var(--c-fg-faint); }
.course-dot.active { background: var(--c-green); width: 40px; }
.course-dot.completed { background: var(--c-accent); }

/* ============ S01 GAME MODAL ============ */
.game-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: courseFadeIn 0.25s ease;
}
.game-overlay.open { display: flex; }

@keyframes courseFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.game-shell {
  width: 100%;
  max-width: 1100px;
  height: min(92vh, 780px);
  background: var(--c-bg);
  color: var(--c-fg);
  border: 1px solid var(--c-border);
  border-radius: 14px;
  box-shadow: 0 0 0 1px rgba(63, 185, 80, 0.15), 0 30px 90px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}

.game-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--c-border);
  background: var(--c-bg-raised);
  flex-shrink: 0;
}
.game-header .term-title { color: var(--c-fg); font-weight: 600; }
.game-header .close {
  margin-left: auto;
  width: 30px;
  height: 30px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-fg-dim);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}
.game-header .close:hover { background: var(--c-bg-soft); color: var(--c-red); border-color: var(--c-red); }

.game-body {
  flex: 1;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  min-height: 0;
}
@media (max-width: 900px) {
  .game-body { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
}

.game-left {
  padding: 18px 22px;
  overflow-y: auto;
  border-right: 1px solid var(--c-border);
  background: var(--c-bg);
}
@media (max-width: 900px) {
  .game-left { border-right: none; border-bottom: 1px solid var(--c-border); }
}

.game-right {
  padding: 18px 22px;
  overflow-y: auto;
  background: var(--c-bg-raised);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quest-label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-green);
  font-weight: 700;
}

.quest-title {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 20px;
  margin: 6px 0 10px;
  font-weight: 700;
  color: var(--c-fg);
  letter-spacing: -0.01em;
}

.quest-prose {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-fg-dim);
}
.quest-prose code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--c-accent);
  font-size: 12px;
}

.quest-action {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.q-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 7px;
  border: 1px solid var(--c-border);
  background: var(--c-bg-soft);
  color: var(--c-fg);
  font-size: 12.5px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
.q-btn:hover { background: var(--c-bg-raised); border-color: var(--c-fg-faint); }
.q-btn:active { transform: translateY(0.5px); }
.q-btn.primary {
  background: linear-gradient(135deg, var(--c-green), #2ea043);
  color: #0d1117;
  border-color: transparent;
  font-weight: 700;
}
.q-btn.primary:hover { filter: brightness(1.1); }
.q-btn.danger { border-color: rgba(248, 81, 73, 0.5); color: var(--c-red); }
.q-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.quest-log {
  margin-top: 18px;
  padding: 10px 14px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: 8px;
  font-size: 12px;
  color: var(--c-fg);
  max-height: 160px;
  overflow-y: auto;
  min-height: 60px;
}
.quest-log .log-line { margin: 2px 0; }
.quest-log .log-ok { color: var(--c-green); }
.quest-log .log-err { color: var(--c-red); }
.quest-log .log-info { color: var(--c-fg-dim); }

/* messages[] panel */
.msgs-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--c-fg-dim);
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--c-border);
}

.msgs-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 80px;
}

.msg {
  padding: 9px 12px;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  background: var(--c-bg);
  font-size: 12px;
  position: relative;
  animation: courseFadeIn 0.3s ease;
}
.msg.role-user { border-left: 3px solid var(--c-cyan); }
.msg.role-assistant { border-left: 3px solid var(--c-magenta); }
.msg.new { box-shadow: 0 0 0 1px rgba(63, 185, 80, 0.4); }

.msg-role {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-fg-dim);
  margin-bottom: 4px;
}
.msg-role.user { color: var(--c-cyan); }
.msg-role.assistant { color: var(--c-magenta); }

.content-block {
  padding: 6px 10px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border-soft);
  border-radius: 6px;
  font-size: 11.5px;
  margin-top: 4px;
}
.content-block.tool-use { border-color: rgba(210, 153, 34, 0.45); color: var(--c-yellow); }
.content-block.tool-result { border-color: rgba(63, 185, 80, 0.45); color: var(--c-green); }
.content-block.text { color: var(--c-fg); }
.content-block .id-tag {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 10px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  color: var(--c-fg-dim);
  font-weight: 600;
}

/* staging slot — where drag targets land */
.stage-slot {
  border: 1.5px dashed var(--c-border);
  border-radius: 8px;
  padding: 12px;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--c-fg-dim);
  font-size: 12px;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: rgba(255,255,255,0.01);
}
.stage-slot.drag-over { border-color: var(--c-green); background: rgba(63, 185, 80, 0.06); color: var(--c-green); }
.stage-slot.populated { border-style: solid; border-color: var(--c-border); background: var(--c-bg); align-items: stretch; }

.draggable {
  cursor: grab;
  transition: transform 0.1s, box-shadow 0.1s;
}
.draggable:active { cursor: grabbing; }
.draggable.dragging { opacity: 0.5; transform: rotate(-0.5deg); }

/* stats bar */
.game-stats {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  border-top: 1px solid var(--c-border);
  background: var(--c-bg-raised);
  font-size: 12px;
  flex-shrink: 0;
}
.stat { display: flex; align-items: center; gap: 6px; }
.stat .label { color: var(--c-fg-dim); text-transform: uppercase; font-size: 10px; letter-spacing: 0.1em; }
.stat .val { color: var(--c-fg); font-weight: 700; }

.game-stats .divider { width: 1px; height: 16px; background: var(--c-border); }
.game-stats .spacer { flex: 1; }

.pitfall {
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  color: var(--c-fg);
}
.pitfall:hover { border-color: var(--c-fg-faint); background: var(--c-bg-soft); }
.pitfall.selected { border-color: var(--c-accent); background: rgba(88,166,255,0.08); }
.pitfall.correct { border-color: var(--c-green); background: rgba(63,185,80,0.08); }
.pitfall.wrong { border-color: var(--c-red); background: rgba(248,81,73,0.08); }

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--c-bg-raised);
  border: 1px solid var(--c-green);
  color: var(--c-fg);
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 200;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  display: none;
  font-family: 'Inter', system-ui, sans-serif;
  max-width: 320px;
}
.toast.show { display: block; animation: toastIn 0.3s ease; }
.toast.err { border-color: var(--c-red); }
@keyframes toastIn {
  from { transform: translateY(10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* =========================================================
   S01 GAME V2 · visual pipeline (overrides old modal body)
   ========================================================= */

.game-v2-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 24px 16px;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

.level-tabs {
  display: flex;
  gap: 6px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
}
.level-tab {
  flex: 1;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  color: var(--c-fg-dim);
  font-size: 11.5px;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.level-tab:disabled { opacity: 0.4; cursor: not-allowed; }
.level-tab .lv-num {
  display: inline-flex;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--c-fg);
}
.level-tab .lv-name {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 600;
  font-size: 12px;
}
.level-tab.active {
  background: var(--c-bg-raised);
  border-color: var(--c-green);
  color: var(--c-fg);
}
.level-tab.active .lv-num { background: var(--c-green); color: #0d1117; border-color: var(--c-green); }
.level-tab.done .lv-num { background: var(--c-accent); color: #0d1117; border-color: var(--c-accent); }

.level-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 0 0;
}
.level-head .lh-title {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-fg);
  letter-spacing: -0.01em;
}
.level-head .lh-sub {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 12.5px;
  color: var(--c-fg-dim);
  margin-top: 3px;
  line-height: 1.5;
}
.level-head .lh-hint {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 11px;
  color: var(--c-fg-faint);
  padding: 6px 10px;
  border: 1px dashed var(--c-border);
  border-radius: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* pipeline diagram */
.pipeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 16px 0;
  position: relative;
}
.pl-node {
  position: relative;
  border-radius: 12px;
  border: 1px solid var(--c-border);
  background: var(--c-bg-soft);
  padding: 12px 10px;
  min-height: 92px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  cursor: default;
}
.pl-node .pl-i {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-fg-faint);
  font-weight: 600;
}
.pl-node .pl-t {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-fg);
  line-height: 1.15;
}
.pl-node .pl-d {
  font-size: 10.5px;
  color: var(--c-fg-dim);
  line-height: 1.4;
  margin-top: auto;
}
.pl-node.active {
  border-color: var(--c-green);
  background: rgba(63,185,80,0.08);
  box-shadow: 0 0 0 2px rgba(63,185,80,0.25), 0 0 20px rgba(63,185,80,0.15);
}
.pl-node.active .pl-i { color: var(--c-green); }
.pl-node.missing {
  border-color: var(--c-red);
  background: rgba(248,81,73,0.06);
  border-style: dashed;
  opacity: 0.65;
}
.pl-node.missing .pl-t { color: var(--c-red); text-decoration: line-through; }
.pl-node.dim { opacity: 0.35; }

.pl-arrow {
  position: absolute;
  top: 50%;
  right: -9px;
  width: 10px;
  height: 2px;
  background: var(--c-border);
  z-index: 1;
}
.pl-arrow::after {
  content: "";
  position: absolute;
  right: -5px;
  top: -3px;
  width: 0;
  height: 0;
  border-left: 6px solid var(--c-border);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
}
.pl-node.active ~ .pl-arrow,
.pl-node.active .pl-arrow { background: var(--c-green); }
.pl-node.active .pl-arrow::after { border-left-color: var(--c-green); }

/* tokens flowing along the pipeline */
.pl-token {
  position: absolute;
  top: 8px;
  left: -28px;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
  background: var(--c-yellow);
  color: #0d1117;
  box-shadow: 0 0 10px rgba(210,153,34,0.5);
  pointer-events: none;
  font-family: 'JetBrains Mono', monospace;
}
.pl-token.t-tool-use { background: var(--c-yellow); }
.pl-token.t-text { background: var(--c-accent); color: #fff; }
.pl-token.t-result { background: var(--c-green); color: #0d1117; }
.pl-token.t-msg { background: var(--c-magenta); color: #fff; }

/* loop back arrow (from last node to first) */
.pl-loop-wrap {
  height: 24px;
  position: relative;
  margin-top: 6px;
}
.pl-loop {
  position: absolute;
  left: 8%;
  right: 8%;
  top: 10px;
  height: 2px;
  background: var(--c-border);
}
.pl-loop::before, .pl-loop::after {
  content: "";
  position: absolute;
  width: 2px;
  height: 10px;
  background: var(--c-border);
  top: -10px;
}
.pl-loop::before { left: 0; }
.pl-loop::after { right: 0; }
.pl-loop-lbl {
  position: absolute;
  left: 50%;
  top: -3px;
  transform: translateX(-50%);
  background: var(--c-bg);
  padding: 0 10px;
  font-size: 10.5px;
  color: var(--c-fg-dim);
  font-family: 'Inter', system-ui, sans-serif;
}
.pl-loop.active { background: var(--c-green); }
.pl-loop.active::before, .pl-loop.active::after { background: var(--c-green); }
.pl-loop.active .pl-loop-lbl { color: var(--c-green); }

/* tick button */
.tick-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border);
  border-radius: 10px;
}
.btn-tick {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-green), #2ea043);
  color: #0d1117;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 13px;
  border: 0;
  cursor: pointer;
  box-shadow: 0 0 0 1px rgba(63,185,80,0.5), 0 4px 18px rgba(63,185,80,0.3);
  transition: transform 0.08s, filter 0.1s;
  letter-spacing: 0.04em;
}
.btn-tick:hover { filter: brightness(1.08); }
.btn-tick:active { transform: translateY(1px); }
.btn-tick:disabled {
  background: var(--c-bg-raised);
  color: var(--c-fg-faint);
  box-shadow: 0 0 0 1px var(--c-border);
  cursor: not-allowed;
}
.tick-hint {
  font-size: 11.5px;
  color: var(--c-fg-dim);
  font-family: 'Inter', system-ui, sans-serif;
}
.tick-ticker {
  margin-left: auto;
  font-size: 11px;
  color: var(--c-fg-dim);
  font-family: 'JetBrains Mono', monospace;
}
.tick-ticker b { color: var(--c-fg); }

/* messages panel v2 */
.msgs-v2 {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  min-height: 80px;
}
.msgs-v2-head {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--c-fg-dim);
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--c-border);
}
.msgs-v2-head b { color: var(--c-fg); font-weight: 600; }
.msgs-v2 .msg {
  padding: 8px 10px;
  font-size: 12px;
  border-radius: 6px;
  border: 1px solid var(--c-border-soft);
  background: var(--c-bg-raised);
  animation: courseFadeIn 0.25s ease;
}
.msgs-v2 .msg .role {
  font-size: 9.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  margin-right: 6px;
}
.msgs-v2 .msg .role.user { color: var(--c-cyan); }
.msgs-v2 .msg .role.assistant { color: var(--c-magenta); }
.msgs-v2 .msg .body { color: var(--c-fg); }
.msgs-v2 .msg .tag {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  background: var(--c-bg);
  color: var(--c-fg-dim);
  font-size: 10px;
  margin-left: 6px;
  border: 1px solid var(--c-border);
}
.msgs-v2 .msg.tool-use { border-left: 3px solid var(--c-yellow); }
.msgs-v2 .msg.tool-result { border-left: 3px solid var(--c-green); }

/* log v2 */
.log-v2 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 10px 12px;
  max-height: 120px;
  overflow-y: auto;
  min-height: 60px;
  line-height: 1.55;
}
.log-v2 .l { padding: 1px 0; }
.log-v2 .l.info { color: var(--c-fg-dim); }
.log-v2 .l.ok { color: var(--c-green); }
.log-v2 .l.warn { color: var(--c-yellow); }
.log-v2 .l.err { color: var(--c-red); }
.log-v2 .l.model { color: var(--c-magenta); }

/* level 2 choices */
.choices { display: grid; gap: 8px; }
.choice {
  padding: 11px 14px;
  border-radius: 9px;
  border: 1px solid var(--c-border);
  background: var(--c-bg-soft);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 12.5px;
  color: var(--c-fg);
  text-align: left;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.choice:hover { border-color: var(--c-fg-faint); background: var(--c-bg-raised); }
.choice.correct { border-color: var(--c-green); background: rgba(63,185,80,0.08); }
.choice.wrong { border-color: var(--c-red); background: rgba(248,81,73,0.08); }
.choice:disabled { cursor: not-allowed; }
.choice small { color: var(--c-fg-dim); font-size: 11px; display: block; margin-top: 4px; }

/* level 3 builder */
.builder-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px;
  background: var(--c-bg);
  border: 1px dashed var(--c-border);
  border-radius: 10px;
  min-height: 54px;
}
.builder-slots {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 10px;
}
.builder-slot {
  min-height: 80px;
  border: 1.5px dashed var(--c-border);
  border-radius: 10px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  color: var(--c-fg-faint);
  text-align: center;
  background: var(--c-bg);
  transition: background 0.15s, border-color 0.15s;
}
.builder-slot .slot-i { font-weight: 700; color: var(--c-fg-dim); font-family: 'JetBrains Mono', monospace; font-size: 11px; }
.builder-slot.drag-over { border-color: var(--c-green); background: rgba(63,185,80,0.08); color: var(--c-green); }
.builder-slot.filled { border-style: solid; border-color: var(--c-border); background: var(--c-bg-soft); color: var(--c-fg); padding: 0; }
.builder-chip {
  cursor: grab;
  padding: 10px 12px;
  border-radius: 9px;
  background: var(--c-bg-raised);
  border: 1px solid var(--c-border);
  font-size: 11.5px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--c-fg);
  transition: transform 0.08s, border-color 0.12s;
  user-select: none;
}
.builder-chip:hover { border-color: var(--c-green); }
.builder-chip.dragging { opacity: 0.35; }
.builder-chip.placed {
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--c-bg-soft);
  border-radius: 10px;
  padding: 10px 8px;
  text-align: center;
}

/* victory card */
.victory {
  border: 1px solid var(--c-green);
  background: rgba(63,185,80,0.08);
  border-radius: 12px;
  padding: 16px 18px;
  font-family: 'Inter', system-ui, sans-serif;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.victory .v-icon {
  font-size: 28px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: -2px;
}
.victory .v-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--c-green);
}
.victory .v-body {
  font-size: 12.5px;
  color: var(--c-fg);
  margin-top: 5px;
  line-height: 1.55;
}
.victory .v-body ul { margin-top: 6px; padding-left: 18px; display: grid; gap: 2px; }
.victory .v-body code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  background: rgba(0,0,0,0.2);
  padding: 1px 5px;
  border-radius: 4px;
}
.victory .v-cta {
  margin-top: 10px;
  display: flex;
  gap: 8px;
}

/* level 2: sabotage badge */
.sabotage-banner {
  background: rgba(210,153,34,0.1);
  border: 1px solid rgba(210,153,34,0.4);
  color: var(--c-yellow);
  padding: 8px 12px;
  border-radius: 8px;
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 12.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sabotage-banner::before {
  content: "⚠";
  font-size: 16px;
}

@media (max-width: 640px) {
  .pipeline { grid-template-columns: 1fr; gap: 10px; }
  .pl-node { min-height: 64px; }
  .pl-arrow { display: none; }
  .pl-loop-wrap { display: none; }
  .builder-slots { grid-template-columns: 1fr; }
}

/* =========================================================
   S02 · Tool Use · content block widgets
   ========================================================= */

.scan-msg {
  background: var(--c-bg-raised);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.scan-msg-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--c-fg-dim);
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--c-border);
}
.scan-msg-head b { color: var(--c-fg); }
.msg-role-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
}
.msg-role-pill.role-assistant {
  background: rgba(188,140,255,0.12);
  color: var(--c-magenta);
  border: 1px solid rgba(188,140,255,0.35);
}
.scan-cnt {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--c-fg-dim);
}

.scan-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.blk {
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  border-radius: 9px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s, opacity 0.2s, transform 0.1s;
  position: relative;
}
.blk.ghost { opacity: 0.55; }
.blk.highlight {
  border-color: var(--c-green);
  box-shadow: 0 0 0 2px rgba(63,185,80,0.25), 0 0 22px rgba(63,185,80,0.15);
  background: rgba(63,185,80,0.05);
  opacity: 1;
}
.blk-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.blk-i {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--c-fg-faint);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.blk-type-pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-family: 'JetBrains Mono', monospace;
  text-transform: lowercase;
}
.blk-type-pill.blu { background: rgba(88,166,255,0.15); color: var(--c-accent); border: 1px solid rgba(88,166,255,0.35); }
.blk-type-pill.gray { background: rgba(125,133,144,0.15); color: var(--c-fg-dim); border: 1px solid rgba(125,133,144,0.35); }
.blk-type-pill.yel { background: rgba(210,153,34,0.15); color: var(--c-yellow); border: 1px solid rgba(210,153,34,0.4); }
.blk-id {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--c-fg-dim);
  background: var(--c-bg-soft);
  padding: 1px 6px;
  border-radius: 3px;
  border: 1px solid var(--c-border);
}
.blk-label {
  margin-left: auto;
  font-size: 11px;
  color: var(--c-fg-dim);
  font-family: 'Inter', system-ui, sans-serif;
}
.blk-body {
  font-size: 12px;
  color: var(--c-fg);
  line-height: 1.55;
  word-break: break-word;
  font-family: 'Inter', system-ui, sans-serif;
}
.blk-body.blk-thinking { color: var(--c-fg-dim); font-style: italic; }
.blk-body.blk-tool {
  font-family: 'JetBrains Mono', monospace;
  color: var(--c-yellow);
  font-size: 12px;
  font-style: normal;
}
.blk-body.blk-tool .blk-tool-name { font-weight: 700; color: var(--c-yellow); }
.blk-body.blk-tool .blk-tool-args { color: var(--c-fg); }

.blk.tappable { cursor: pointer; }
.blk.tappable:hover { border-color: var(--c-fg-faint); background: var(--c-bg-soft); }
.blk.picked-yes {
  border-color: var(--c-green);
  background: rgba(63,185,80,0.1);
  box-shadow: 0 0 0 1px rgba(63,185,80,0.4);
}
.blk.picked-yes::after {
  content: "✓";
  position: absolute;
  top: 10px;
  right: 12px;
  color: var(--c-green);
  font-weight: 700;
  font-size: 14px;
}
.blk.picked-no {
  border-color: var(--c-red);
  background: rgba(248,81,73,0.07);
  box-shadow: 0 0 0 1px rgba(248,81,73,0.4);
  animation: shake 0.3s ease;
}
.blk.picked-no::after {
  content: "✗";
  position: absolute;
  top: 10px;
  right: 12px;
  color: var(--c-red);
  font-weight: 700;
  font-size: 14px;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

/* runtime actions legend */
.actions-panel {
  background: var(--c-bg-raised);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ap-head {
  font-size: 11px;
  color: var(--c-fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.ap-legend {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.ap-legend .lg {
  font-size: 11.5px;
  font-family: 'Inter', system-ui, sans-serif;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
}
.ap-legend .lg-text { color: var(--c-accent); }
.ap-legend .lg-thinking { color: var(--c-fg-dim); }
.ap-legend .lg-tool { color: var(--c-yellow); }

.ap-exec {
  background: var(--c-bg);
  border: 1px dashed var(--c-border);
  border-radius: 8px;
  padding: 10px 12px;
  min-height: 50px;
}
.ap-exec-head {
  font-size: 10.5px;
  color: var(--c-fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.ap-exec-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
}
.ap-exec-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-border-soft);
  border-radius: 6px;
  flex-wrap: wrap;
}
.ap-exec-row .exec-name { color: var(--c-yellow); font-weight: 700; }
.ap-exec-row .exec-args { color: var(--c-fg); }

.broken-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  line-height: 1.65;
  background: var(--c-bg);
  border: 1px solid var(--c-red);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--c-fg);
  white-space: pre-wrap;
  overflow-x: auto;
  position: relative;
}
.broken-code::before {
  content: "broken · 这里出了问题";
  position: absolute;
  top: -9px;
  left: 14px;
  background: var(--c-bg);
  color: var(--c-red);
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 0 6px;
  font-weight: 700;
  font-family: 'Inter', system-ui, sans-serif;
  text-transform: uppercase;
}