:root {
  color-scheme: light;
  --ink: #07142f;
  --ink-2: #0d2455;
  --muted: #5e6675;
  --paper: #fffdf8;
  --paper-2: #f8f4ea;
  --line: #d9cfbb;
  --gold: #b78322;
  --gold-dark: #8a6900;
  --cyan: #37a0a4;
  --shadow: 0 28px 80px rgba(7, 20, 47, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
  background: var(--paper);
}

body {
  position: relative;
  min-height: 100vh;
  margin: 0;
  overflow-x: clip;
  background-color: var(--paper);
  background:
    radial-gradient(circle at 8% 0%, rgba(183, 131, 34, 0.16), transparent 28rem),
    linear-gradient(180deg, var(--paper), var(--paper-2));
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("assets/doodles-mates-fisica.png");
  background-size: min(1780px, 165vw) auto;
  background-position: center 3rem;
  background-repeat: repeat-y;
  opacity: 0.3;
  mix-blend-mode: multiply;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(255, 253, 248, 0.88), rgba(255, 253, 248, 0.5) 45%, rgba(255, 253, 248, 0.82)),
    linear-gradient(180deg, rgba(255, 253, 248, 0.08), rgba(255, 253, 248, 0.6));
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0.9rem 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  width: 3.55rem;
  height: 3.55rem;
  border: 1px solid rgba(7, 20, 47, 0.1);
  border-radius: 0.7rem;
  object-fit: cover;
  object-position: center 34%;
  box-shadow: 0 10px 28px rgba(7, 20, 47, 0.1);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1rem;
  line-height: 1.1;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
}

.main-nav a {
  text-decoration: none;
}

.nav-cta {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.72rem 1rem;
  background: rgba(255, 253, 248, 0.76);
  color: var(--ink);
}

main {
  padding-bottom: 2rem;
}

section,
.hero {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  display: block;
  width: min(980px, calc(100% - 2rem));
  min-height: auto;
  padding: clamp(2.2rem, 4.8vw, 4rem) 0 clamp(3.2rem, 6vw, 5rem);
  text-align: center;
}

.hero-copy {
  margin: 0 auto;
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.9rem;
  color: var(--gold-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.question-title {
  max-width: 13ch;
  margin: 0 auto;
  font-size: clamp(3rem, 6.4vw, 5.55rem);
  line-height: 0.92;
  letter-spacing: 0;
}

.inline-equation {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.32rem 0.62rem;
  align-items: center;
  margin: 1.8rem auto 0;
  border: 0;
  padding: 0.6rem 1.25rem 0.76rem;
  background: transparent;
  color: var(--ink);
  font-family: "Caveat", "Segoe Print", cursive;
  font-size: clamp(2.15rem, 4vw, 3.35rem);
  font-weight: 700;
  line-height: 0.9;
  transform: rotate(-0.35deg);
}

.inline-equation::before,
.mini-equation::before,
.implication strong::before {
  content: "";
  position: absolute;
  inset: -0.2rem -0.5rem -0.28rem;
  z-index: -2;
  background: rgba(255, 253, 248, 0.78);
  border-radius: 1.1rem 0.8rem 1rem 0.65rem / 0.75rem 1rem 0.7rem 0.9rem;
  box-shadow: 8px 8px 0 rgba(183, 131, 34, 0.13);
  transform: rotate(0.22deg);
}

.inline-equation::after,
.mini-equation::after,
.implication strong::after {
  content: "";
  position: absolute;
  inset: -0.28rem -0.65rem -0.34rem;
  z-index: -1;
  pointer-events: none;
  background: url("data:image/svg+xml,%3Csvg preserveAspectRatio='none' viewBox='0 0 640 112' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M13 17 C95 8 190 15 276 11 C395 6 514 10 627 18 C635 40 625 70 630 96 C526 105 389 99 270 103 C167 107 78 101 14 96 C7 73 15 44 13 17Z' fill='none' stroke='%2307142f' stroke-width='5' stroke-linecap='round' stroke-linejoin='round' vector-effect='non-scaling-stroke'/%3E%3Cpath d='M18 20 C122 13 216 21 315 15 C425 10 532 16 622 22 C625 45 620 71 623 91 C500 99 384 94 261 99 C151 102 73 96 19 91 C13 67 20 43 18 20Z' fill='none' stroke='%2307142f' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round' opacity='.34' vector-effect='non-scaling-stroke'/%3E%3C/svg%3E") center / 100% 100% no-repeat;
}

.inline-equation b {
  color: var(--gold);
  font-family: Inter, system-ui, sans-serif;
  font-size: 0.8em;
  line-height: 1;
}

.implication {
  display: grid;
  justify-items: center;
  gap: 1.05rem;
  width: fit-content;
  margin: 1.5rem auto 1.55rem;
}

.implication b {
  color: var(--gold);
  font-size: clamp(5.3rem, 9vw, 7.45rem);
  line-height: 0.62;
  text-shadow: 0 18px 36px rgba(183, 131, 34, 0.18);
}

.implication strong {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  justify-content: center;
  border: 0;
  padding: 0.5rem 1.25rem 0.75rem;
  background: transparent;
  color: var(--ink);
  font-family: "Caveat", "Segoe Print", cursive;
  font-size: clamp(3rem, 5.2vw, 4.5rem);
  font-weight: 700;
  line-height: 0.82;
  transform: rotate(-0.25deg);
}

.hero-text {
  max-width: 50rem;
  margin: 1.35rem auto 0;
  color: var(--muted);
  font-size: 1.16rem;
}

.level-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem 1.8rem;
  margin: 1.6rem auto 0;
}

.level-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.35rem 0.15rem;
  border-bottom: 3px solid #c5a14a;
  background: transparent;
  font-weight: 800;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}

.level-nav a:hover, .level-nav a:focus-visible {
  border-color: var(--cyan);
  color: var(--ink-2);
}

.level-nav a:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }
.level-nav span { color: var(--gold-dark); font-size: 1.15rem; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
  margin-top: 1.7rem;
}

.button,
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  border: 0;
  border-radius: 999px;
  padding: 0.88rem 1.18rem;
  font: inherit;
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
}

.button.primary,
.contact-form button {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 18px 42px rgba(7, 20, 47, 0.22);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.78);
}

.formula-board {
  position: relative;
  display: grid;
  align-content: center;
  min-height: 25rem;
  padding: clamp(1.5rem, 4vw, 3.2rem);
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(rgba(7, 20, 47, 0.86), rgba(7, 20, 47, 0.92)),
    url("assets/doodles-mates-fisica.png") center / 1050px auto;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 0.35rem;
  box-shadow: 18px 18px 0 rgba(183, 131, 34, 0.2), var(--shadow);
}

.formula-board::before,
.formula-board::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.formula-board::before {
  inset: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.formula-board::after {
  right: 1.1rem;
  top: 1.1rem;
  width: 4.5rem;
  height: 4.5rem;
  border-top: 2px solid rgba(183, 131, 34, 0.8);
  border-right: 2px solid rgba(183, 131, 34, 0.8);
}

.board-label {
  position: relative;
  z-index: 1;
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.path-equation {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem 0.72rem;
  align-items: center;
  margin: 1rem 0;
  font-size: clamp(2rem, 3.35vw, 3.05rem);
  font-weight: 900;
  line-height: 1;
}

.path-equation span {
  position: relative;
  white-space: nowrap;
}

.path-equation span::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.18rem;
  height: 0.14rem;
  background: rgba(183, 131, 34, 0.8);
}

.path-equation b {
  color: var(--gold);
}

.formula-board p {
  position: relative;
  z-index: 1;
  max-width: 25rem;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 1.08rem;
}

.story-section,
.method-section,
.courses-section,
.community-section,
.results-section,
.offers-section,
.faq-section,
.contact-section {
  padding: clamp(2.8rem, 5.5vw, 4.9rem) 0;
}

.chapter {
  width: fit-content;
  margin-bottom: 1.15rem;
  color: var(--gold);
  font-size: clamp(3.4rem, 7vw, 6rem);
  font-weight: 900;
  line-height: 0.8;
}

.chapter + .split .eyebrow,
.chapter + .section-heading .eyebrow,
.chapter + .result-manifest .eyebrow {
  font-size: clamp(1.08rem, 1.55vw, 1.28rem);
  letter-spacing: 0.08em;
}

.split {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2.2rem, 4.7vw, 4.65rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.35rem;
  font-size: 1.25rem;
  line-height: 1.15;
}

.notebook-list {
  display: grid;
  border-top: 2px solid var(--ink);
}

.notebook-list p {
  margin: 0;
  border-bottom: 1px solid var(--line);
  padding: 1.1rem 0;
  color: var(--ink);
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
  font-weight: 800;
}

.section-heading {
  max-width: 56rem;
  margin-bottom: 1.45rem;
}

.study-route {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink);
}

.study-route li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: clamp(1rem, 4vw, 4rem);
  align-items: start;
  border-bottom: 1px solid var(--line);
  padding: 1.45rem 0;
}

.study-route span {
  color: var(--gold-dark);
  font-size: clamp(1.18rem, 1.75vw, 1.5rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.study-route p,
.stage-ledger span,
.result-manifest p,
.offer-ledger p,
.contact-copy p:last-child {
  color: var(--muted);
}

.stage-ledger {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.35rem);
  align-items: stretch;
  padding: 1.2rem 0 0.4rem;
  border: 0;
}

.stage-ledger > a {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
  align-content: start;
  min-height: 14rem;
  border: 0;
  border-radius: 0.16rem;
  padding: 1.55rem 1.18rem 1.15rem;
  background: #fff3cf;
  box-shadow:
    0 24px 34px rgba(7, 20, 47, 0.12),
    inset 0 -0.45rem 0 rgba(183, 131, 34, 0.12);
  transform: rotate(-1.2deg);
  color: var(--ink);
  text-decoration: none;
}

.stage-ledger > a::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -0.6rem;
  width: 4.8rem;
  height: 1.15rem;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.26));
  border: 1px solid rgba(183, 131, 34, 0.18);
  box-shadow: 0 8px 16px rgba(7, 20, 47, 0.07);
  transform: translateX(-50%) rotate(3deg);
}

.stage-ledger > a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 2.3rem;
  height: 2.3rem;
  background: linear-gradient(135deg, transparent 49%, rgba(7, 20, 47, 0.09) 50%, rgba(255, 255, 255, 0.7) 52%);
}

.stage-ledger > a:nth-child(2) {
  background: #eaf0ff;
  transform: rotate(1deg);
}

.stage-ledger > a:nth-child(3) {
  background: #e7fbf8;
  transform: rotate(-0.4deg);
}

.stage-ledger > a:nth-child(4) {
  background: #f6e2a8;
  transform: rotate(1.3deg);
}

.stage-ledger > a:nth-child(5) {
  background: #eef3ff;
  transform: rotate(-0.8deg);
}

.stage-ledger strong {
  max-width: 8ch;
  font-size: clamp(1.55rem, 2.6vw, 2.25rem);
  line-height: 0.98;
}

.stage-ledger span {
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.35;
}

.stage-ledger small { align-self: end; margin-top: auto; color: var(--ink-2); font-weight: 800; }
.stage-ledger > a:hover, .stage-ledger > a:focus-visible { outline: 2px solid var(--gold); outline-offset: 4px; }
.level-details { margin-top: 3rem; border-top: 2px solid var(--ink); }
.level-details article { display: grid; grid-template-columns: minmax(10rem, 0.45fr) 1fr; gap: 2rem; padding: 2rem 0; border-bottom: 1px solid var(--line); scroll-margin-top: 6rem; }
.level-details article > span { color: var(--gold-dark); font-weight: 800; font-size: 0.9rem; }
.level-details h3 { font-size: 1.5rem; }
.level-details p { color: var(--muted); max-width: 48rem; }
.level-details a { color: var(--ink-2); font-weight: 800; text-underline-offset: 0.25rem; }
.subjects { display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0; margin: 0 0 1.2rem; list-style: none; }
.subjects li { padding: 0.35rem 0.75rem; background: #d7efed; border-radius: 0.25rem; font-weight: 700; }
.director-section { display: grid; grid-template-columns: minmax(12rem, 19rem) 1fr; align-items: center; gap: 3rem; padding: 4rem 0; }
.director-photo img { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 50%; }
.director-section h2 { font-size: 3rem; }
.director-role { margin: 0.7rem 0; color: var(--gold-dark); font-weight: 800; }
.director-copy > p:not(.eyebrow):not(.director-role) { max-width: 43rem; color: var(--muted); font-size: 1.1rem; }

.chalk-band {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 4rem);
  color: white;
  background:
    linear-gradient(120deg, rgba(7, 20, 47, 0.94), rgba(9, 31, 78, 0.9)),
    url("assets/doodles-mates-fisica.png") center / 1300px auto;
  border-radius: 0.35rem;
  box-shadow: 16px 16px 0 rgba(54, 160, 164, 0.22);
}

.chalk-band .eyebrow {
  color: var(--gold);
}

.chalk-band h2 {
  max-width: 12ch;
}

.chalk-band p:last-child {
  max-width: 42rem;
  margin: 1rem 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 1.12rem;
}

.result-manifest {
  display: grid;
  gap: 1rem;
  max-width: 66rem;
}

.mini-equation {
  position: relative;
  isolation: isolate;
  width: fit-content;
  border: 0;
  padding: 0.64rem 1.15rem 0.82rem;
  background: transparent;
  color: var(--gold-dark);
  font-family: "Caveat", "Segoe Print", cursive;
  font-size: clamp(1.85rem, 3vw, 2.75rem);
  font-weight: 700;
  line-height: 0.95;
  transform: rotate(-0.25deg);
}

.offer-ledger {
  display: grid;
  border-top: 2px solid var(--ink);
}

.offer-ledger div {
  display: grid;
  grid-template-columns: 8rem 1fr 1.2fr;
  gap: 1.4rem;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  padding: 1.2rem 0;
}

.offer-ledger span {
  color: var(--gold-dark);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.offer-ledger strong {
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.15;
}

.offer-ledger p {
  margin-bottom: 0;
}

.faq-section {
  width: 100%;
  padding-inline: 1rem;
}

.faq-panel {
  position: relative;
  overflow: hidden;
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4rem);
  color: #fff;
  background:
    linear-gradient(120deg, rgba(7, 20, 47, 0.96), rgba(7, 20, 47, 0.88)),
    url("assets/doodles-mates-fisica.png") center / 1380px auto;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 0.4rem;
  box-shadow: 18px 18px 0 rgba(183, 131, 34, 0.14);
}

.faq-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 82% 15%, rgba(54, 160, 164, 0.18), transparent 22rem);
}

.faq-panel .section-heading {
  position: relative;
  z-index: 1;
}

.faq-panel .eyebrow {
  color: var(--gold);
}

.faq-panel h2 {
  max-width: 13ch;
}

.faq-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem;
}

.faq-grid details {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 0.6rem;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.faq-grid summary {
  display: grid;
  grid-template-columns: 2.25rem 1fr auto;
  gap: 0.95rem;
  align-items: center;
  min-height: 4.6rem;
  padding: 0.9rem 1rem;
  color: rgba(255, 255, 255, 0.92);
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

.faq-grid summary::-webkit-details-marker {
  display: none;
}

.faq-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: 900;
}

.faq-grid summary b {
  color: rgba(255, 255, 255, 0.42);
  font-size: 1.25rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

.faq-grid details[open] summary b {
  transform: rotate(180deg);
}

.faq-grid details p {
  margin: 0;
  padding: 0 1rem 1.15rem 4.2rem;
  color: rgba(255, 255, 255, 0.68);
}

.contact-section {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.contact-copy {
  position: sticky;
  top: 6rem;
}

.contact-copy p:last-child {
  font-size: 1.08rem;
}

.contact-form {
  display: grid;
  gap: 1rem;
  border-top: 2px solid var(--ink);
  padding-top: 1.25rem;
}

.contact-form label {
  display: grid;
  gap: 0.45rem;
  color: var(--ink);
  font-weight: 900;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 0.9rem 0;
  background: rgba(255, 253, 248, 0.58);
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 0;
  border-color: var(--ink);
}

.contact-form button {
  width: 100%;
  margin-top: 0.5rem;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.form-note a {
  color: var(--ink);
  font-weight: 900;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
}

.site-footer strong,
.site-footer a {
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
}

@media (max-width: 920px) {
  body::before {
    background-size: 1300px auto;
    background-position: center 5rem;
    opacity: 0.24;
  }

  .site-header {
    align-items: flex-start;
  }

  .main-nav {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .hero,
  .split,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .faq-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 1rem;
  }

  .formula-board {
    min-height: 22rem;
  }

  .study-route li,
  .stage-ledger > a,
  .offer-ledger div {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .stage-ledger {
    grid-template-columns: repeat(2, minmax(12rem, 1fr));
  }

  .contact-copy {
    position: static;
  }
}

@media (max-width: 640px) {
  body::before {
    background-size: 1120px auto;
    background-position: center 4rem;
    opacity: 0.22;
  }

  .site-header {
    position: static;
    display: grid;
  }

  .main-nav {
    justify-content: flex-start;
    font-size: 0.88rem;
  }

  .main-nav a:not(.nav-cta) {
    display: none;
  }

  .nav-cta,
  .button {
    width: 100%;
    text-align: center;
  }

  .question-title {
    max-width: 100%;
    font-size: clamp(2.25rem, 10.2vw, 3rem);
    line-height: 0.96;
  }

  .inline-equation {
    max-width: 100%;
    gap: 0.22rem 0.42rem;
    padding: 0.5rem 0.72rem 0.64rem;
    font-size: clamp(1.72rem, 7vw, 2.05rem);
  }

  .implication {
    gap: 0.95rem;
    margin: 1.25rem auto 1.35rem;
  }

  .implication b {
    font-size: 5.35rem;
  }

  .implication strong {
    width: min(100%, 22rem);
    padding: 0.52rem 0.88rem 0.72rem;
    font-size: clamp(2.3rem, 10.8vw, 2.85rem);
  }

  .hero-actions {
    display: grid;
    margin-top: 1.55rem;
  }

  .stage-ledger {
    grid-template-columns: 1fr;
  }

  .stage-ledger > a {
    min-height: 9.6rem;
    transform: rotate(-0.6deg);
  }

  .formula-board {
    min-height: 18rem;
    padding: 1.6rem;
    box-shadow: 8px 8px 0 rgba(183, 131, 34, 0.18);
  }

  .path-equation {
    max-width: 16rem;
    font-size: clamp(1.65rem, 9vw, 2.15rem);
  }

  h2 {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .story-section,
  .method-section,
  .courses-section,
  .community-section,
  .results-section,
  .offers-section,
  .faq-section,
  .contact-section {
    padding: 3rem 0;
  }

  .faq-section {
    padding-inline: 1rem;
  }

  .faq-panel {
    padding: 2rem 1rem;
    box-shadow: 8px 8px 0 rgba(183, 131, 34, 0.12);
  }

  .faq-panel h2 {
    max-width: 100%;
  }

  .faq-grid summary {
    grid-template-columns: 2rem 1fr auto;
    gap: 0.75rem;
    min-height: 4.25rem;
    padding: 0.8rem;
  }

  .faq-icon {
    width: 2rem;
    height: 2rem;
  }

  .faq-grid details p {
    padding: 0 0.8rem 1rem 3.55rem;
  }

  .chapter {
    font-size: 3.3rem;
  }

  .chapter + .split .eyebrow,
  .chapter + .section-heading .eyebrow,
  .chapter + .result-manifest .eyebrow {
    font-size: 1.08rem;
  }

  .study-route span {
    font-size: 1.18rem;
  }

  .mini-equation {
    width: 100%;
    font-size: clamp(1.55rem, 7.2vw, 2rem);
  }

  .level-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .level-nav a { justify-content: center; }
  .level-details article { grid-template-columns: 1fr; gap: 0.5rem; scroll-margin-top: 1rem; }
  .director-section { grid-template-columns: 1fr; gap: 1.5rem; padding: 3rem 0; }
  .director-photo { max-width: 13rem; }
  .director-section h2 { font-size: 2.4rem; }
}