/* =========================================================================
   TUTORIAL ENGINE — Cyber Web
   Reusable interactive tutorial system.
   - Full-viewport spotlight scrim with SVG cutout
   - Callout tooltip that follows targets
   - Control bar (play/pause/prev/next/step dots/speed/exit)
   - Top progress bar
   - Completion confetti + success card
   Extends platform.css tokens.
   ========================================================================= */

/* ============ Scrim (dark overlay with target cutout) ============ */
.tu-root {
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  opacity: 0;
  transition: opacity .35s cubic-bezier(.16,1,.3,1);
}
.tu-root.on { opacity: 1; pointer-events: auto; }

.tu-scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: auto;
}
.tu-scrim svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* The cutout ring — glow around the spotlighted target */
.tu-halo {
  position: absolute;
  z-index: 2;
  border-radius: 12px;
  pointer-events: none;
  transition:
    top    .5s cubic-bezier(.16,1,.3,1),
    left   .5s cubic-bezier(.16,1,.3,1),
    width  .5s cubic-bezier(.16,1,.3,1),
    height .5s cubic-bezier(.16,1,.3,1),
    opacity .3s ease;
  box-shadow:
    0 0 0 1.5px var(--p-cyan),
    0 0 24px 4px color-mix(in oklab, var(--p-cyan) 55%, transparent),
    0 0 60px 12px color-mix(in oklab, var(--p-cyan) 25%, transparent);
  animation: tuHaloPulse 2.4s ease-in-out infinite;
}
@keyframes tuHaloPulse {
  0%, 100% {
    box-shadow:
      0 0 0 1.5px var(--p-cyan),
      0 0 24px 4px color-mix(in oklab, var(--p-cyan) 55%, transparent),
      0 0 60px 12px color-mix(in oklab, var(--p-cyan) 25%, transparent);
  }
  50% {
    box-shadow:
      0 0 0 1.5px var(--p-cyan),
      0 0 34px 6px color-mix(in oklab, var(--p-cyan) 75%, transparent),
      0 0 80px 18px color-mix(in oklab, var(--p-cyan) 40%, transparent);
  }
}

/* ============ Callout tooltip ============ */
.tu-callout {
  position: absolute;
  z-index: 3;
  width: 380px;
  max-width: calc(100vw - 40px);
  padding: 20px 22px 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, var(--p-glass-strong-1) 0%, var(--p-glass-strong-2) 100%);
  border: 1px solid var(--p-hair-2);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  box-shadow:
    0 30px 80px rgba(0,0,0,.55),
    0 0 40px color-mix(in oklab, var(--p-cyan) 20%, transparent);
  color: var(--p-ink);
  pointer-events: auto;
  overflow: hidden;
  transition:
    top    .5s cubic-bezier(.16,1,.3,1),
    left   .5s cubic-bezier(.16,1,.3,1),
    opacity .4s ease,
    transform .4s cubic-bezier(.16,1,.3,1);
  opacity: 0;
  transform: translateY(6px);
}
.tu-callout.on { opacity: 1; transform: translateY(0); }
.tu-callout::before {
  content: "";
  position: absolute;
  top: 0; left: 12%; right: 12%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--p-cyan), transparent);
  pointer-events: none;
}

/* Callout arrow (small triangle pointing to target) */
.tu-callout .arrow {
  position: absolute;
  width: 14px;
  height: 14px;
  background: inherit;
  border: 1px solid var(--p-hair-2);
  transform: rotate(45deg);
  z-index: -1;
}
.tu-callout[data-place="top"] .arrow    { bottom: -8px; left: 50%; margin-left: -7px; border-top: 0; border-left: 0; }
.tu-callout[data-place="bottom"] .arrow { top: -8px; left: 50%; margin-left: -7px; border-bottom: 0; border-right: 0; }
.tu-callout[data-place="left"] .arrow   { right: -8px; top: 50%; margin-top: -7px; border-left: 0; border-bottom: 0; }
.tu-callout[data-place="right"] .arrow  { left: -8px; top: 50%; margin-top: -7px; border-right: 0; border-top: 0; }

/* Callout head */
.tu-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.tu-step-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--p-cyan) 16%, transparent);
  border: 1px solid color-mix(in oklab, var(--p-cyan) 35%, transparent);
  color: var(--p-cyan);
  font-family: var(--p-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.tu-timer {
  margin-left: auto;
  width: 22px;
  height: 22px;
  position: relative;
}
.tu-timer svg {
  width: 22px;
  height: 22px;
  transform: rotate(-90deg);
  overflow: visible;
}
.tu-timer .track {
  fill: none;
  stroke: var(--p-hair);
  stroke-width: 2;
}
.tu-timer .fill {
  fill: none;
  stroke: var(--p-cyan);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 62.83;   /* 2πr for r=10 */
  stroke-dashoffset: 62.83;
  transition: stroke-dashoffset .3s linear;
  filter: drop-shadow(0 0 4px color-mix(in oklab, var(--p-cyan) 60%, transparent));
}
.tu-timer.done .fill { stroke-dashoffset: 0; }

/* Title + body */
.tu-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--p-ink);
  letter-spacing: -.015em;
  line-height: 1.25;
}
.tu-body {
  margin: 0;
  font-size: 13px;
  color: var(--p-ink-2);
  line-height: 1.55;
  letter-spacing: -.005em;
}
.tu-body b, .tu-body strong { color: var(--p-cyan-2); font-weight: 600; }
.tu-body kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--p-hl-inner);
  border: 1px solid var(--p-hair-2);
  color: var(--p-ink);
  font-family: var(--p-mono);
  font-size: 11px;
  letter-spacing: .04em;
  box-shadow: inset 0 -1px 0 var(--p-hair);
}
.tu-body code {
  padding: 1px 5px;
  border-radius: 4px;
  background: color-mix(in oklab, var(--p-cyan) 10%, transparent);
  color: var(--p-cyan-2);
  font-family: var(--p-mono);
  font-size: 11.5px;
  letter-spacing: .02em;
}

/* Try-it prompt (when requireClick) */
.tu-hint {
  margin-top: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  background: color-mix(in oklab, var(--p-cyan) 12%, transparent);
  border: 1px solid color-mix(in oklab, var(--p-cyan) 30%, transparent);
  color: var(--p-cyan);
  font-family: var(--p-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tu-hint .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 6px currentColor;
  animation: tuHintPulse 1.5s ease-in-out infinite;
}
@keyframes tuHintPulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%     { opacity: .55; transform: scale(1.3); }
}

/* ============ Control bar (bottom center) ============ */
.tu-controls {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9010;
  padding: 8px 10px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--p-glass-strong-1) 0%, var(--p-glass-strong-2) 100%);
  border: 1px solid var(--p-hair-2);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  box-shadow: 0 20px 50px rgba(0,0,0,.45);
  display: flex;
  align-items: center;
  gap: 4px;
  pointer-events: auto;
  opacity: 0;
  transform: translate(-50%, 12px);
  transition: opacity .4s ease, transform .4s cubic-bezier(.16,1,.3,1);
}
.tu-root.on .tu-controls { opacity: 1; transform: translate(-50%, 0); }

.tu-btn {
  width: 34px; height: 34px;
  border-radius: 999px;
  border: 0;
  background: transparent;
  color: var(--p-ink-2);
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 11px;
  transition: all .18s ease;
}
.tu-btn:hover:not(:disabled) { color: var(--p-cyan); background: color-mix(in oklab, var(--p-cyan) 12%, transparent); }
.tu-btn:disabled { opacity: .35; cursor: default; }
.tu-btn.play {
  width: 40px; height: 40px;
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  color: var(--p-on-cyan);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 12px color-mix(in oklab, var(--p-cyan) 35%, transparent);
  font-size: 13px;
}
.tu-btn.play:hover:not(:disabled) {
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  color: var(--p-on-cyan);
  transform: scale(1.05);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 6px 16px color-mix(in oklab, var(--p-cyan) 55%, transparent);
}

.tu-dots {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  border-left: 1px solid var(--p-hair);
  border-right: 1px solid var(--p-hair);
  margin: 0 4px;
  height: 28px;
}
.tu-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--p-hair-2);
  cursor: pointer;
  transition: all .18s ease;
  border: 0;
  padding: 0;
}
.tu-dot:hover { background: var(--p-ink-3); }
.tu-dot.active {
  width: 22px;
  border-radius: 999px;
  background: var(--p-cyan);
  box-shadow: 0 0 6px color-mix(in oklab, var(--p-cyan) 60%, transparent);
}
.tu-dot.done { background: color-mix(in oklab, var(--p-emerald) 65%, transparent); }

.tu-speed {
  padding: 5px 10px;
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--p-hair);
  color: var(--p-ink-2);
  cursor: pointer;
  font-family: var(--p-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .04em;
  transition: all .18s ease;
}
.tu-speed:hover { color: var(--p-cyan); border-color: var(--p-cyan); }

.tu-exit {
  color: var(--p-ink-3);
}
.tu-exit:hover:not(:disabled) {
  color: var(--p-danger);
  background: color-mix(in oklab, var(--p-danger) 12%, transparent);
}

/* ============ Progress bar (top of viewport) ============ */
.tu-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 9020;
  background: color-mix(in oklab, #000 60%, transparent);
  pointer-events: none;
  opacity: 0;
  transition: opacity .3s ease;
}
.tu-root.on .tu-progress { opacity: 1; }
.tu-progress .bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--p-cyan-3), var(--p-cyan), var(--p-cyan-2));
  box-shadow: 0 0 10px color-mix(in oklab, var(--p-cyan) 55%, transparent);
  transition: width .5s cubic-bezier(.16,1,.3,1);
}

/* ============ Completion card ============ */
.tu-complete {
  position: fixed;
  inset: 0;
  z-index: 9030;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: color-mix(in oklab, #000 60%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.tu-complete.on { display: flex; animation: tuCompleteIn .4s ease; }
@keyframes tuCompleteIn { from { opacity: 0; } to { opacity: 1; } }

.tu-complete-card {
  width: 100%;
  max-width: 460px;
  padding: 32px 32px 28px;
  border-radius: 20px;
  background: linear-gradient(180deg, var(--p-glass-strong-1) 0%, var(--p-glass-strong-2) 100%);
  border: 1px solid var(--p-hair-2);
  backdrop-filter: blur(30px) saturate(160%);
  -webkit-backdrop-filter: blur(30px) saturate(160%);
  box-shadow:
    0 40px 100px rgba(0,0,0,.55),
    0 0 60px color-mix(in oklab, var(--p-cyan) 30%, transparent);
  text-align: center;
  position: relative;
  overflow: hidden;
  animation: tuCardIn .5s cubic-bezier(.16,1,.3,1);
}
@keyframes tuCardIn { from { opacity: 0; transform: translateY(20px) scale(.96); } to { opacity: 1; transform: translateY(0) scale(1); } }
.tu-complete-card::before {
  content: "";
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--p-cyan), transparent);
  pointer-events: none;
}

.tu-badge {
  width: 68px;
  height: 68px;
  margin: 0 auto 18px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.35), transparent 55%),
    linear-gradient(180deg, var(--p-emerald), color-mix(in oklab, var(--p-emerald) 55%, #000));
  display: grid;
  place-items: center;
  color: #04180f;
  font-size: 28px;
  border: 2px solid color-mix(in oklab, var(--p-emerald) 60%, transparent);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.35),
    0 12px 30px color-mix(in oklab, var(--p-emerald) 45%, transparent);
  animation: tuBadgePop .6s cubic-bezier(.16,1.5,.3,1) .1s both;
}
@keyframes tuBadgePop { 0% { transform: scale(0); } 100% { transform: scale(1); } }

.tu-complete h2 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 700;
  color: var(--p-ink);
  letter-spacing: -.02em;
}
.tu-complete p {
  margin: 0 0 22px;
  font-size: 14px;
  color: var(--p-ink-3);
  line-height: 1.5;
}
.tu-complete-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.tu-complete-actions button, .tu-complete-actions a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -.005em;
  text-decoration: none;
  transition: all .18s ease;
}
.tu-complete-actions .primary {
  border: 1px solid var(--p-hair-3);
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  color: var(--p-on-cyan);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 12px color-mix(in oklab, var(--p-cyan) 35%, transparent);
}
.tu-complete-actions .primary:hover {
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 6px 16px color-mix(in oklab, var(--p-cyan) 50%, transparent);
}
.tu-complete-actions .ghost {
  background: transparent;
  border: 1px solid var(--p-hair);
  color: var(--p-ink-2);
}
.tu-complete-actions .ghost:hover {
  color: var(--p-ink);
  border-color: var(--p-hair-2);
  background: var(--p-hair);
}

/* Confetti canvas */
.tu-confetti {
  position: fixed;
  inset: 0;
  z-index: 9040;
  pointer-events: none;
  display: none;
}
.tu-confetti.on { display: block; }

/* ============ Tutorial hub cards (used on tutorials.html) ============ */
.hub-head {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--p-hair);
  position: relative;
}
.hub-head::after {
  content: "";
  position: absolute;
  bottom: -1px; left: 8%; right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--p-hair-3), transparent);
  pointer-events: none;
}
.hub-titles { flex: 1; min-width: 0; }
.hub-titles h1 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: var(--p-ink);
  letter-spacing: -.025em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hub-titles h1 .diamond { color: var(--p-cyan); font-size: 12px; filter: drop-shadow(0 0 6px currentColor); }
.hub-titles .sub {
  margin-top: 4px;
  font-family: var(--p-mono);
  font-size: 11px;
  color: var(--p-ink-3);
  letter-spacing: .04em;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 1100px) { .hub-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .hub-grid { grid-template-columns: 1fr; } }

.hub-card {
  position: relative;
  padding: 20px 22px 18px;
  border-radius: 14px;
  background: linear-gradient(180deg, var(--p-glass-mid-1) 0%, var(--p-glass-mid-2) 100%);
  border: 1px solid var(--p-hair);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 12px;
  cursor: pointer;
  transition: all .28s cubic-bezier(.16,1,.3,1);
  text-decoration: none;
  color: inherit;
}
.hub-card::before {
  content: "";
  position: absolute;
  top: 0; left: 15%; right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--p-hair-3), transparent);
  pointer-events: none;
  transition: opacity .3s ease;
}
.hub-card:hover {
  border-color: var(--p-hair-2);
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 var(--p-hl-inner),
    0 20px 40px rgba(0,0,0,.20),
    0 0 24px color-mix(in oklab, var(--p-cyan) 18%, transparent);
}
.hub-card:hover::before { background: linear-gradient(90deg, transparent, var(--p-cyan), transparent); }

.hub-card-head {
  display: flex; align-items: center; gap: 12px;
}
.hub-card-ic {
  width: 42px; height: 42px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font-size: 16px;
  color: var(--p-on-cyan);
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 10px color-mix(in oklab, var(--p-cyan) 30%, transparent);
}
.hub-card-ic.iris    { background: linear-gradient(180deg, #a6b8ff, #6b7fd8); box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 10px rgba(122, 143, 232, .35); }
.hub-card-ic.emerald { background: linear-gradient(180deg, #7fe8c8, color-mix(in oklab, var(--p-emerald) 55%, #000)); color: #04180f; box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 10px color-mix(in oklab, var(--p-emerald) 35%, transparent); }
.hub-card-ic.gold    { background: linear-gradient(180deg, #ffd79a, color-mix(in oklab, var(--p-gold) 60%, #000)); color: #2a1a04; box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 10px color-mix(in oklab, var(--p-gold) 35%, transparent); }
.hub-card-ic.rose    { background: linear-gradient(180deg, #ffb7c9, color-mix(in oklab, var(--p-rose) 55%, #000)); color: #2a0410; box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 10px color-mix(in oklab, var(--p-rose) 35%, transparent); }

.hub-card-titles { flex: 1; min-width: 0; }
.hub-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--p-ink);
  letter-spacing: -.015em;
  line-height: 1.2;
  margin-bottom: 3px;
}
.hub-card-sub {
  font-size: 12px;
  color: var(--p-ink-3);
  letter-spacing: -.005em;
  line-height: 1.35;
}

.hub-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.hub-duration-pill {
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--p-hair);
  border: 1px solid var(--p-hair-2);
  color: var(--p-ink-2);
  font-family: var(--p-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.hub-duration-pill i { color: var(--p-ink-3); font-size: 9px; }
.hub-status-pill {
  padding: 3px 10px;
  border-radius: 999px;
  font-family: var(--p-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.hub-status-pill.new     { background: color-mix(in oklab, var(--p-cyan-2) 14%, transparent); border: 1px solid color-mix(in oklab, var(--p-cyan-2) 32%, transparent); color: var(--p-cyan-2); }
.hub-status-pill.in-progress { background: color-mix(in oklab, var(--p-gold) 14%, transparent); border: 1px solid color-mix(in oklab, var(--p-gold) 32%, transparent); color: var(--p-gold); }
.hub-status-pill.done    { background: color-mix(in oklab, var(--p-emerald) 14%, transparent); border: 1px solid color-mix(in oklab, var(--p-emerald) 32%, transparent); color: var(--p-emerald); }
.hub-status-pill.done::before { content: "✓"; }

.hub-card-body {
  font-size: 12.5px;
  color: var(--p-ink-2);
  line-height: 1.55;
  letter-spacing: -.005em;
  min-height: 40px;
}

.hub-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--p-hair-3);
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  color: var(--p-on-cyan);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -.005em;
  transition: all .2s ease;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 10px color-mix(in oklab, var(--p-cyan) 30%, transparent);
  align-self: flex-start;
}
.hub-card:hover .hub-cta {
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 6px 14px color-mix(in oklab, var(--p-cyan) 45%, transparent);
}
.hub-cta i { font-size: 10px; }

/* Overall progress strip on hub */
.hub-summary {
  padding: 14px 18px;
  border-radius: 12px;
  background: color-mix(in oklab, var(--p-cyan) 6%, transparent);
  border: 1px solid color-mix(in oklab, var(--p-cyan) 25%, transparent);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.hub-summary .ic {
  width: 34px; height: 34px;
  border-radius: 8px;
  display: grid; place-items: center;
  background: color-mix(in oklab, var(--p-cyan) 18%, transparent);
  color: var(--p-cyan);
  font-size: 14px;
  filter: drop-shadow(0 0 6px color-mix(in oklab, var(--p-cyan) 40%, transparent));
}
.hub-summary .txt { flex: 1; }
.hub-summary .lbl {
  font-family: var(--p-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--p-cyan);
  margin-bottom: 4px;
}
.hub-summary .val {
  font-size: 14px;
  color: var(--p-ink);
  font-weight: 500;
  letter-spacing: -.005em;
}
.hub-summary .val b { color: var(--p-cyan); font-weight: 700; }
.hub-summary .bar {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--p-hair);
  overflow: hidden;
  position: relative;
  max-width: 200px;
}
.hub-summary .bar::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: var(--pct, 0%);
  background: linear-gradient(90deg, var(--p-cyan-3), var(--p-cyan));
  box-shadow: 0 0 6px color-mix(in oklab, var(--p-cyan) 45%, transparent);
  transition: width .6s cubic-bezier(.16,1,.3,1);
}
.hub-summary .reset-btn {
  padding: 6px 12px;
  border-radius: 7px;
  background: transparent;
  border: 1px solid var(--p-hair);
  color: var(--p-ink-3);
  cursor: pointer;
  font: inherit;
  font-size: 11px;
  transition: all .15s ease;
}
.hub-summary .reset-btn:hover {
  color: var(--p-danger);
  border-color: color-mix(in oklab, var(--p-danger) 40%, transparent);
  background: color-mix(in oklab, var(--p-danger) 10%, transparent);
}

/* Small intro CTA button used on individual tutorial pages */
.tu-intro {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: color-mix(in oklab, #000 55%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s ease;
}
.tu-intro.on { opacity: 1; pointer-events: auto; }

.tu-intro-card {
  width: 100%;
  max-width: 480px;
  padding: 28px 30px 26px;
  border-radius: 18px;
  background: linear-gradient(180deg, var(--p-glass-strong-1) 0%, var(--p-glass-strong-2) 100%);
  border: 1px solid var(--p-hair-2);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  box-shadow:
    0 30px 80px rgba(0,0,0,.5),
    0 0 40px color-mix(in oklab, var(--p-cyan) 22%, transparent);
  position: relative;
  overflow: hidden;
  animation: tuCardIn .5s cubic-bezier(.16,1,.3,1);
}
.tu-intro-card::before {
  content: "";
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--p-cyan), transparent);
  pointer-events: none;
}
.tu-intro-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.tu-intro-ic {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  color: var(--p-on-cyan);
  font-size: 17px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 6px 16px color-mix(in oklab, var(--p-cyan) 35%, transparent);
}
.tu-intro-titles h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--p-ink);
  letter-spacing: -.02em;
}
.tu-intro-titles .sub {
  font-family: var(--p-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--p-ink-3);
  text-transform: uppercase;
  margin-top: 3px;
}
.tu-intro-body {
  font-size: 13.5px;
  color: var(--p-ink-2);
  line-height: 1.55;
  margin-bottom: 20px;
}
.tu-intro-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.tu-intro-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 12.5px;
  color: var(--p-ink-2);
  letter-spacing: -.005em;
  line-height: 1.5;
}
.tu-intro-list li::before {
  content: "▸";
  color: var(--p-cyan);
  font-size: 11px;
  filter: drop-shadow(0 0 4px currentColor);
  margin-top: 2px;
}
.tu-intro-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.tu-intro-actions .primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--p-hair-3);
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  color: var(--p-on-cyan);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -.005em;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 4px 12px color-mix(in oklab, var(--p-cyan) 35%, transparent);
  transition: all .2s ease;
}
.tu-intro-actions .primary:hover {
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 6px 16px color-mix(in oklab, var(--p-cyan) 50%, transparent);
}
.tu-intro-actions .primary i { font-size: 11px; }
.tu-intro-actions .ghost {
  padding: 10px 16px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid var(--p-hair);
  color: var(--p-ink-2);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -.005em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: all .15s ease;
}
.tu-intro-actions .ghost:hover {
  color: var(--p-ink);
  border-color: var(--p-hair-2);
  background: var(--p-hair);
}
.tu-intro-actions .mode-toggle {
  margin-left: auto;
  display: inline-flex;
  padding: 3px;
  border-radius: 999px;
  background: var(--p-hl-inner);
  border: 1px solid var(--p-hair);
}
.tu-intro-actions .mode-toggle button {
  padding: 5px 10px;
  border-radius: 999px;
  background: transparent;
  border: 0;
  color: var(--p-ink-3);
  cursor: pointer;
  font: inherit;
  font-size: 10.5px;
  font-weight: 600;
  font-family: var(--p-mono);
  letter-spacing: .04em;
  transition: all .15s ease;
}
.tu-intro-actions .mode-toggle button.on {
  background: color-mix(in oklab, var(--p-cyan) 22%, transparent);
  color: var(--p-cyan);
}

/* Small floating "Tutorial mode" pill shown on real pages when overlay is available */
.tu-floating-start {
  position: fixed;
  bottom: 22px;
  right: 22px;
  z-index: 55;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--p-hair-3);
  background: linear-gradient(180deg, var(--p-cyan-3), var(--p-cyan-deep));
  color: var(--p-on-cyan);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -.005em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 10px 26px color-mix(in oklab, var(--p-cyan) 35%, transparent);
  transition: all .2s ease;
}
.tu-floating-start:hover {
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35), 0 14px 32px color-mix(in oklab, var(--p-cyan) 50%, transparent);
}

/* ============ Responsive ============ */
@media (max-width: 640px) {
  .tu-callout { width: calc(100vw - 32px); }
  .tu-controls { padding: 6px 8px; }
  .tu-btn { width: 30px; height: 30px; }
  .tu-btn.play { width: 36px; height: 36px; }
  .tu-dots { padding: 0 6px; margin: 0 2px; }
  .tu-speed { padding: 4px 8px; font-size: 9.5px; }
  .tu-intro-card { padding: 22px; }
  .tu-intro-titles h2 { font-size: 18px; }
}