.tutorial { padding: 1.2rem 0 2.4rem; max-width: 100%; overflow-x: hidden; }
.tutorial-hero { text-align: center; margin-bottom: 1.6rem; }
.tutorial-hero h1 {
  font-family: var(--display); color: var(--navy);
  font-size: clamp(1.45rem, 3.6vw, 2.15rem); margin: .2rem 0 .5rem; line-height: 1.25;
}
.tutorial-lead { color: var(--muted); font-size: 1.02rem; max-width: 42rem; margin: 0 auto .85rem; }
.tutorial-intro { max-width: 46rem; margin: 0 auto 1.4rem; line-height: 1.55; }

.tutorial-toc {
  list-style: none; margin: 0 0 2rem; padding: 1rem 1.1rem;
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  border: 1px solid #e3eaef; display: grid; gap: .35rem;
}
.tutorial-toc a { font-weight: 600; color: var(--ocean); }
@media (min-width: 720px) {
  .tutorial-toc { grid-template-columns: 1fr 1fr; }
}

.tutorial-section { margin: 2.2rem 0; }
.tutorial-section h2 {
  font-family: var(--display); color: var(--navy);
  font-size: clamp(1.2rem, 2.6vw, 1.55rem); margin: 0 0 .7rem;
}
.tutorial-section h3 { color: var(--navy); margin: 1.2rem 0 .5rem; }

.tutorial-figure {
  margin: 0 0 1rem; position: relative;
  background: #0B1F33; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid #d5dee6;
}
.tutorial-figure img, .tutorial-figure picture {
  display: block; width: 100%; height: auto; vertical-align: middle;
}
.tutorial-figure button.tutorial-open {
  display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in;
}
.tutorial-figure .marks { position: absolute; inset: 0; pointer-events: none; }
.tutorial-mark {
  position: absolute; transform: translate(-50%, -50%);
  width: 1.55rem; height: 1.55rem; border-radius: 50%;
  background: #E8A317; color: #0B1F33; font-weight: 800; font-size: .78rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 0 3px rgba(255,255,255,.92), 0 4px 10px rgba(11,31,51,.35);
}

.tutorial-num-cards {
  display: grid; gap: .65rem; margin: 1rem 0;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .tutorial-num-cards { grid-template-columns: 1fr 1fr; }
}
.tutorial-num-card {
  background: #fff; border: 1px solid #e3eaef; border-radius: 12px;
  padding: .75rem .9rem; display: flex; gap: .65rem; align-items: flex-start;
  box-shadow: 0 6px 16px rgba(11,31,51,.06);
}
.tutorial-num {
  flex: 0 0 auto; width: 1.7rem; height: 1.7rem; border-radius: 50%;
  background: var(--navy); color: #fff; font-weight: 800; font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
}

.tutorial-box {
  border-radius: var(--radius); padding: 1rem 1.15rem; margin: 1.1rem 0;
  border: 1px solid #e3eaef; background: #fff; box-shadow: var(--shadow);
}
.tutorial-box h3 { margin: 0 0 .45rem; }
.tutorial-box-idea { background: #eef5fb; border-color: #c5d8ea; }
.tutorial-box-warn { background: var(--alert-soft); border-color: #e2c47a; }
.tutorial-box-danger { background: #f8e8e6; border-left: 5px solid #C0392B; }

.tutorial-compare {
  display: flex; flex-wrap: wrap; gap: .5rem; margin: .7rem 0 1rem;
}
.tutorial-pill {
  border-radius: 999px; padding: .35rem .8rem; font-weight: 700; font-size: .88rem;
}
.tutorial-pill-ok { background: #e7f4ea; color: #1e6b34; }
.tutorial-pill-alert { background: #f8e0dc; color: #a12316; }

.tutorial-legend { display: grid; gap: .7rem; margin: 1rem 0; }
@media (min-width: 720px) {
  .tutorial-legend { grid-template-columns: 1fr 1fr; }
}
.tutorial-legend-item {
  background: #fff; border-radius: 12px; padding: .8rem .95rem;
  border: 1px solid #e3eaef; display: flex; gap: .7rem; align-items: flex-start;
}
.tutorial-swatch {
  width: 1.15rem; height: 1.15rem; border-radius: 50%; flex: 0 0 auto; margin-top: .15rem;
  border: 2px solid #fff; box-shadow: 0 0 0 1px #c5d0da;
}
.tutorial-swatch-blue { background: #1A4B73; }
.tutorial-swatch-purple-dash {
  background: transparent;
  border-radius: 0;
  height: 0;
  margin-top: .55rem;
  border: none;
  box-shadow: none;
  border-top: 3px dashed #6B4C9A;
}
.tutorial-swatch-yellow { background: #E8A317; }
.tutorial-swatch-red { background: #C0392B; }
.tutorial-swatch-white { background: #d5dbe1; }

.tutorial-steps { display: grid; gap: .65rem; margin: 1rem 0; }
.tutorial-step {
  background: #fff; border-radius: 12px; padding: .8rem 1rem;
  border: 1px solid #e3eaef; display: grid; grid-template-columns: auto 1fr; gap: .7rem;
}
.tutorial-step-n {
  font-weight: 800; color: var(--ocean); font-size: .78rem; letter-spacing: .04em;
}

.tutorial-scheme {
  font-family: ui-monospace, monospace; background: #0B1F33; color: #d5e0ea;
  border-radius: 12px; padding: 1rem 1.1rem; margin: .8rem 0; line-height: 1.6;
}
.tutorial-scheme .dot-w { color: #fff; }
.tutorial-scheme .dot-o { color: #E8A317; }

.tutorial-btn-demo {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 40px; padding: .4rem .9rem; border-radius: 12px;
  border: 1px solid var(--ocean); background: #fff; color: var(--ocean);
  font-weight: 700; pointer-events: none;
}

.tutorial-flow {
  background: var(--navy); color: #fff; border-radius: var(--radius);
  padding: 1.1rem; text-align: center; letter-spacing: .04em; font-weight: 700;
  margin: 1rem 0;
}
.tutorial-flow span { display: block; }
.tutorial-flow .arrow { color: var(--alert); margin: .25rem 0; font-weight: 400; }

.tutorial-split { display: grid; gap: 1rem; align-items: start; }
@media (min-width: 900px) {
  .tutorial-split { grid-template-columns: 1.15fr .85fr; }
}

.tutorial-figure-sm { max-width: 420px; margin-inline: auto; }

.tutorial-lightbox {
  position: fixed; inset: 0; z-index: 80; background: rgba(11,31,51,.88);
  display: flex; align-items: center; justify-content: center; padding: 1rem;
}
.tutorial-lightbox[hidden] { display: none !important; }
.tutorial-lightbox-inner {
  max-width: min(1100px, 100%); max-height: 92vh; overflow: auto;
  touch-action: pinch-zoom;
  background: #000; border-radius: 12px;
}
.tutorial-lightbox-inner img { display: block; width: 100%; height: auto; }
.tutorial-lightbox-close {
  position: absolute; top: .7rem; right: .7rem; width: 2.4rem; height: 2.4rem;
  border: 0; border-radius: 50%; background: #fff; color: var(--navy);
  font-size: 1.5rem; font-weight: 700; cursor: pointer;
}