.mfl-guide-page { max-width: 1120px; }
.mfl-guide-intro { max-width: 930px; margin-bottom: 24px; }
.mfl-guide-intro h1 { font-size: clamp(2.4rem, 5.4vw, 4.65rem); }
.mfl-guide-intro .lede { max-width: 900px; }

.mfl-guide-flow {
  margin-top: 18px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 760;
}
.mfl-guide-flow span { display: inline-flex; align-items: center; gap: 7px; }
.mfl-guide-flow strong {
  width: 25px;
  height: 25px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: var(--dark);
  color: var(--accent);
  font-size: .72rem;
}

.mfl-guide-jump {
  margin: 0 0 18px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.mfl-guide-jump a {
  padding: 7px 9px;
  border-radius: 9px;
  color: var(--muted);
  text-decoration: none;
  font-size: .76rem;
  font-weight: 790;
}
.mfl-guide-jump a:hover { background: var(--bg); color: var(--text); }

.mfl-guide-section {
  margin-top: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}
.mfl-guide-section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  margin-bottom: 19px;
}
.mfl-guide-section-head h2 {
  margin: 0 0 8px;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  letter-spacing: -.035em;
}
.mfl-guide-section-head p { margin: 0; max-width: 860px; color: var(--muted); line-height: 1.58; }
.mfl-guide-step {
  min-width: 66px;
  padding: 8px 9px;
  border-radius: 999px;
  background: var(--dark);
  color: var(--accent);
  font-size: .66rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-align: center;
}

.mfl-guide-visual-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #f8f9f5;
}
.mfl-guide-visual-heading {
  padding: 13px 15px;
  border-bottom: 1px solid var(--line);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.mfl-guide-visual-heading span,
.mfl-guide-card-kicker {
  color: var(--muted);
  font-size: .66rem;
  font-weight: 900;
  letter-spacing: .09em;
}
.mfl-guide-visual-heading strong { font-size: .83rem; }

.mfl-guide-svg,
.mfl-condition-svg { width: 100%; height: auto; display: block; font-family: Inter, ui-sans-serif, system-ui, sans-serif; }
.mfl-svg-track { fill: #d9dcd5; stroke: #62685f; stroke-width: 2; }
.mfl-svg-gwb { fill: #fff; stroke: #aeb3aa; stroke-width: 1.5; }
.mfl-svg-gwb-accent { fill: #f4ffc2; stroke: #9cab2c; }
.mfl-svg-finish-highlight { stroke: #20231f; stroke-width: 4; }
.mfl-svg-track-highlight { stroke: #9cab2c; stroke-width: 4; }
.mfl-svg-witness { stroke: #a4aaa0; stroke-width: 1.5; }
.mfl-svg-dim { stroke: #6d716a; stroke-width: 2; }
.mfl-svg-dim-text { fill: #181a17; font-size: 17px; font-weight: 900; text-anchor: middle; }
.mfl-svg-finish-label { fill: #181a17; font-size: 13px; font-weight: 900; text-anchor: middle; }
.mfl-svg-track-label { fill: #63701d; font-size: 12px; font-weight: 900; text-anchor: middle; }
.mfl-svg-small { fill: #565c53; font-size: 12px; font-weight: 900; text-anchor: middle; dominant-baseline: middle; }
.mfl-svg-board-label { fill: #4d551b; font-size: 11px; font-weight: 900; text-anchor: middle; dominant-baseline: middle; }
.mfl-svg-track-word { fill: #565c53; font-size: 15px; font-weight: 900; text-anchor: middle; dominant-baseline: middle; }
.mfl-svg-label-leader { stroke: #20231f; stroke-width: 1.5; }
.mfl-svg-label-leader-track { stroke: #9cab2c; }
.mfl-svg-space { fill: #777d73; font-size: 12px; font-weight: 850; text-anchor: middle; letter-spacing: .08em; }

.mfl-guide-note {
  margin: 14px 0 0;
  padding: 13px 15px;
  border-left: 4px solid var(--accent);
  background: #f8f9f5;
  color: var(--muted);
  line-height: 1.55;
  font-size: .86rem;
}

.mfl-guide-two-col,
.mfl-guide-direction-grid,
.mfl-axis-grid,
.mfl-condition-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.mfl-guide-build-card,
.mfl-guide-direction-card,
.mfl-axis-card,
.mfl-condition-card {
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #f8f9f5;
}
.mfl-guide-build-card h3 { margin: 8px 0 13px; font-size: 1.2rem; }
.mfl-guide-build-card p,
.mfl-axis-card p { margin: 13px 0 0; color: var(--muted); font-size: .83rem; line-height: 1.5; }
.mfl-guide-build-row {
  padding: 9px 0;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: .84rem;
}
.mfl-guide-build-row strong { font-size: 1rem; }

.mfl-guide-direction-card { display: grid; gap: 9px; }
.mfl-guide-direction-card > span { color: var(--muted); font-size: .66rem; font-weight: 900; letter-spacing: .08em; }
.mfl-guide-direction-card > strong { font-size: 1.12rem; }
.mfl-guide-direction-card.is-add { border-color: #dce887; background: var(--accent-soft); }
.mfl-guide-move-line {
  margin-top: 3px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
}
.mfl-guide-move-line i { font-style: normal; color: var(--muted); font-size: .72rem; font-weight: 900; }
.mfl-guide-move-line b { font-size: 1.35rem; }
.mfl-guide-equation {
  margin-top: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: #fff;
  display: grid;
  gap: 7px;
  text-align: center;
}
.mfl-guide-equation span { color: var(--muted); font-size: .7rem; font-weight: 850; text-transform: uppercase; letter-spacing: .07em; }
.mfl-guide-equation strong { font-size: clamp(1.15rem, 3vw, 1.55rem); }
.mfl-guide-equation small { color: var(--muted); line-height: 1.45; }

.mfl-condition-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.mfl-condition-top span { font-size: .72rem; font-weight: 900; letter-spacing: .06em; }
.mfl-condition-top strong { padding: 5px 7px; border-radius: 7px; background: var(--dark); color: var(--accent); font-size: .61rem; letter-spacing: .06em; }
.mfl-condition-svg { margin-top: 7px; }
.mfl-mini-track { fill: #d9dcd5; stroke: #62685f; stroke-width: 2; }
.mfl-mini-gwb { fill: #f4ffc2; stroke: #9cab2c; stroke-width: 1.5; }
.mfl-mini-finish { stroke: #20231f; stroke-width: 4; }
.mfl-mini-target { stroke: #9cab2c; stroke-width: 4; }
.mfl-mini-label { fill: #555b52; font-size: 14px; font-weight: 850; text-anchor: middle; }
.mfl-mini-move { fill: #181a17; font-size: 13px; font-weight: 900; text-anchor: middle; }
.mfl-condition-equation {
  padding: 9px 10px;
  border-radius: 9px;
  background: #fff;
  text-align: center;
  font-size: .82rem;
}

.mfl-axis-card { padding-top: 14px; }
.mfl-axis-line { stroke: #181a17; stroke-width: 3; stroke-dasharray: 7 5; }
.mfl-axis-label { fill: #181a17; font-size: 13px; font-weight: 900; text-anchor: middle; }
.mfl-axis-given { stroke: #6d716a; stroke-width: 2; }
.mfl-axis-given-text { fill: #181a17; font-size: 14px; font-weight: 900; text-anchor: middle; }
.mfl-axis-result { fill: #181a17; font-size: 15px; font-weight: 900; text-anchor: middle; }

.mfl-reference-card {
  margin-top: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.mfl-reference-card h2 { margin: 0 0 15px; }
.mfl-reference-wrap { overflow-x: auto; }
.mfl-reference-table { width: 100%; border-collapse: collapse; min-width: 720px; font-size: .82rem; }
.mfl-reference-table th,
.mfl-reference-table td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.mfl-reference-table th { background: #f8f9f5; color: var(--muted); font-size: .67rem; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
.mfl-reference-table td:first-child { font-weight: 850; }
.mfl-memory-rule {
  margin-top: 14px;
  padding: 14px 15px;
  border-radius: 12px;
  background: var(--dark);
  color: #fff;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
}
.mfl-memory-rule strong { color: var(--accent); font-size: .74rem; }
.mfl-memory-rule span { color: #e6e9e2; font-size: .82rem; line-height: 1.45; }

.mfl-guide-summary {
  margin-top: 18px;
  padding: 24px;
  border-radius: 18px;
  background: var(--dark);
  color: #fff;
}
.mfl-guide-summary .section-kicker { color: var(--accent); }
.mfl-guide-summary h2 { margin: 0 0 15px; color: #fff; }
.mfl-guide-summary ol { margin: 0; padding-left: 23px; display: grid; gap: 10px; }
.mfl-guide-summary li { padding-left: 5px; line-height: 1.5; color: #e6e9e2; }
.mfl-guide-summary strong { color: #fff; }

.mfl-guide-next {
  margin-top: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.mfl-guide-next h2 { margin: 0 0 5px; }
.mfl-guide-next p:not(.section-kicker) { margin: 0; color: var(--muted); line-height: 1.45; }
.mfl-guide-next .primary-button { flex: 0 0 auto; text-decoration: none; text-align: center; }

@media (max-width: 760px) {
  .mfl-guide-intro h1 { font-size: clamp(2.05rem, 10.2vw, 3.1rem); line-height: 1.06; }
  .mfl-guide-intro { margin-bottom: 16px; }
  .mfl-guide-flow { margin-top: 14px; display: grid; grid-template-columns: 1fr; gap: 7px; font-size: .78rem; }
  .mfl-guide-flow > span[aria-hidden="true"] { display: none; }
  .mfl-guide-flow > span:not([aria-hidden="true"]) { width: 100%; padding: 5px 0; }
  .mfl-guide-jump { overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
  .mfl-guide-jump a { flex: 0 0 auto; }
  .mfl-guide-section { padding: 16px 12px; border-radius: 16px; }
  .mfl-guide-section-head { grid-template-columns: 1fr; gap: 10px; }
  .mfl-guide-step { justify-self: start; }
  .mfl-guide-visual-heading { align-items: flex-start; flex-direction: column; gap: 4px; }
  .mfl-guide-two-col,
  .mfl-guide-direction-grid,
  .mfl-axis-grid,
  .mfl-condition-grid { grid-template-columns: 1fr; }
  .mfl-guide-svg { min-width: 0; }
  .mfl-memory-rule { grid-template-columns: 1fr; gap: 7px; }
  .mfl-guide-next { align-items: stretch; flex-direction: column; }
  .mfl-guide-next .primary-button { width: 100%; }
  .mfl-reference-card { padding: 18px 14px; }
}

@media (max-width: 430px) {
  .mfl-guide-section { padding-left: 10px; padding-right: 10px; }
  .mfl-guide-visual-heading { padding: 11px 12px; }
  .mfl-condition-card,
  .mfl-axis-card,
  .mfl-guide-build-card,
  .mfl-guide-direction-card { padding: 13px 10px; }
  .mfl-svg-dim-text { font-size: 19px; }
  .mfl-mini-label { font-size: 16px; }
  .mfl-mini-move { font-size: 15px; }
  .mfl-axis-result { font-size: 17px; }
}

/* Preview 12.1 lesson-method polish */
.mfl-guide-top-actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}
.mfl-guide-top-actions a { text-decoration: none; }

.mfl-check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.mfl-check-card {
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f8f9f5;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 11px;
  align-items: start;
}
.mfl-check-number {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--dark);
  color: var(--accent);
  font-size: .72rem;
  font-weight: 900;
}
.mfl-check-card strong { display: block; margin: 2px 0 4px; }
.mfl-check-card p { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.48; }
.mfl-example-rule {
  margin-top: 14px;
  padding: 15px 16px;
  border: 1px solid #dce887;
  border-left: 4px solid var(--accent);
  border-radius: 13px;
  background: var(--accent-soft);
}
.mfl-example-rule > span { display: block; margin-bottom: 5px; color: var(--muted); font-size: .66rem; font-weight: 900; letter-spacing: .08em; }
.mfl-example-rule > strong { display: block; line-height: 1.45; }
.mfl-example-rule p { margin: 7px 0 0; color: var(--muted); font-size: .82rem; line-height: 1.5; }

.mfl-guide-direction-grid-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mfl-guide-direction-card p { margin: 0; color: var(--muted); font-size: .8rem; line-height: 1.48; }
.mfl-guide-direction-card.is-same { background: #f8f9f5; }

.mfl-drawing-key {
  margin: 0 0 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8f9f5;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--muted);
  font-size: .75rem;
  font-weight: 760;
}
.mfl-drawing-key span { display: inline-flex; align-items: center; gap: 7px; }
.mfl-key-line { width: 27px; height: 0; border-top: 3px solid #20231f; }
.mfl-key-line-layout { border-color: #9cab2c; }
.mfl-mini-witness-given { stroke: #20231f; stroke-width: 1.5; }
.mfl-mini-witness-layout { stroke: #9cab2c; stroke-width: 1.5; }
.mfl-mini-given-line { stroke: #20231f; stroke-width: 2; }
.mfl-mini-layout-line { stroke: #9cab2c; stroke-width: 2.5; }
.mfl-mini-point-given { fill: #20231f; }
.mfl-mini-point-target { fill: #9cab2c; }
.mfl-mini-given-text { fill: #181a17; font-size: 12px; font-weight: 900; text-anchor: middle; }
.mfl-mini-layout-text { fill: #63701d; font-size: 12px; font-weight: 900; text-anchor: middle; }

.mfl-reference-table-simple { min-width: 620px; }
.mfl-reference-table-simple td:first-child { font-weight: 700; }

.mfl-guide-next-actions {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}
.mfl-guide-next-actions a { text-decoration: none; text-align: center; }

@media (max-width: 760px) {
  .mfl-guide-top-actions { align-items: stretch; flex-direction: column; }
  .mfl-guide-top-actions .subtle-button { width: 100%; text-align: center; }
  .mfl-check-grid,
  .mfl-guide-direction-grid-three { grid-template-columns: 1fr; }
  .mfl-drawing-key { display: grid; grid-template-columns: 1fr; }
  .mfl-guide-next-actions { width: 100%; display: grid; grid-template-columns: 1fr; }
  .mfl-guide-next-actions .primary-button,
  .mfl-guide-next-actions .subtle-button { width: 100%; }
}

/* Preview 12.2 Step 3 interactive checkpoint */
.mfl-guide-choice {
  width: 100%;
  appearance: none;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color .16s ease, background .16s ease, transform .16s ease, box-shadow .16s ease;
}
.mfl-guide-choice:hover {
  border-color: #b8bdb0;
  background: #fff;
  transform: translateY(-1px);
}
.mfl-guide-choice:focus-visible {
  outline: 3px solid rgba(229, 255, 80, .55);
  outline-offset: 3px;
}
.mfl-guide-choice.is-correct {
  border-color: #9cab2c;
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px #9cab2c;
}
.mfl-guide-choice.is-wrong {
  border-color: #c8a39d;
  background: #fff7f5;
}
.mfl-guide-check-feedback {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8f9f5;
  display: grid;
  gap: 3px;
}
.mfl-guide-check-feedback strong { font-size: .88rem; }
.mfl-guide-check-feedback span { color: var(--muted); font-size: .8rem; line-height: 1.45; }
.mfl-guide-check-feedback.is-correct { border-color: #dce887; background: var(--accent-soft); }
.mfl-guide-check-feedback.is-wrong { border-color: #e4c9c4; background: #fff7f5; }