:root {
  --color-bg: #0b1020;
  --color-bg-soft: #111831;
  --color-bg-card: #151f3d;
  --color-bg-card-strong: #1d2a52;
  --color-text: #eef3ff;
  --color-text-muted: #b7c2dd;
  --color-heading: #ffffff;
  --color-border: rgba(255, 255, 255, 0.13);
  --color-border-strong: rgba(255, 255, 255, 0.22);
  --color-primary: #8fb6ff;
  --color-primary-strong: #6da1ff;
  --color-accent: #f6d985;
  --color-success: #8ee6c1;
  --font-body: Arial, Helvetica, sans-serif;
  --font-heading: Arial, Helvetica, sans-serif;
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 6rem;
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-pill: 999px;
  --shadow-card: 0 1rem 3rem rgba(0, 0, 0, 0.22);
  --shadow-button: 0 0.7rem 1.5rem rgba(109, 161, 255, 0.24);
  --container-width: 1120px;
  --container-padding: 1.25rem;
  --logo-height: 3.75rem;
  --logo-max-width: 360px;
  --nav-height: 5.5rem;
  --mobile-menu-top: 5.5rem;
  --line-height-body: 1.7;
  --line-height-heading: 1.1;
  --transition-fast: 180ms ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background: radial-gradient(circle at top left, rgba(109, 161, 255, 0.22), transparent 28rem), radial-gradient(circle at top right, rgba(246, 217, 133, 0.13), transparent 26rem), var(--color-bg);
}
img { max-width: 100%; display: block; }
a { color: inherit; }
p { margin: 0 0 var(--space-sm); color: var(--color-text-muted); }
h1, h2, h3 { margin: 0; font-family: var(--font-heading); line-height: var(--line-height-heading); color: var(--color-heading); letter-spacing: -0.03em; }
h1 { font-size: clamp(2.4rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { font-size: 1.25rem; }
ul, ol { margin: var(--space-sm) 0 0; padding-left: 1.2rem; }
li { margin-bottom: var(--space-2xs); color: var(--color-text-muted); }
.container { width: min(var(--container-width), calc(100% - (var(--container-padding) * 2))); margin-inline: auto; }
.narrow { max-width: 760px; }
.content-wide { max-width: var(--container-width); }
.section { padding-block: var(--space-3xl); }
.section-muted { background: rgba(255, 255, 255, 0.035); border-block: 1px solid var(--color-border); }
.section-heading { max-width: 780px; margin-bottom: var(--space-xl); }
.section-kicker, .eyebrow, .stream-label { margin-bottom: var(--space-xs); color: var(--color-accent); text-transform: uppercase; letter-spacing: 0.12em; font-weight: 800; font-size: 0.8rem; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(11, 16, 32, 0.84); backdrop-filter: blur(16px); border-bottom: 1px solid var(--color-border); }
.nav { min-height: var(--nav-height); display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }
.brand { display: inline-flex; align-items: center; text-decoration: none; }
.brand-logo { width: auto; height: var(--logo-height); max-width: var(--logo-max-width); }
.nav-links { display: flex; align-items: center; gap: var(--space-md); }
.nav-links a { color: var(--color-text-muted); text-decoration: none; font-weight: 700; font-size: 0.95rem; transition: color var(--transition-fast); }
.nav-links a:hover { color: var(--color-text); }
.nav-links .nav-cta { padding: 0.65rem 1rem; color: var(--color-bg); background: var(--color-primary); border-radius: var(--radius-pill); }
.nav-toggle { display: none; width: 2.5rem; height: 2.5rem; padding: 0; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: transparent; }
.nav-toggle span { display: block; width: 1.15rem; height: 0.12rem; margin: 0.25rem auto; background: var(--color-text); border-radius: var(--radius-pill); }
.hero { padding-top: var(--space-2xl); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr); gap: var(--space-xl); align-items: center; }
.hero-lead { max-width: 760px; margin-top: var(--space-md); font-size: clamp(1.08rem, 2vw, 1.3rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-lg); }
.center-actions { justify-content: center; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: 0.85rem 1.2rem; border-radius: var(--radius-pill); text-decoration: none; font-weight: 800; border: 1px solid transparent; transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast); }
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--color-bg); background: var(--color-primary); box-shadow: var(--shadow-button); }
.button-primary:hover { background: var(--color-primary-strong); }
.button-secondary { color: var(--color-text); border-color: var(--color-border-strong); background: rgba(255, 255, 255, 0.06); }
.button-secondary:hover { border-color: var(--color-primary); }
.hero-proof { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-sm); margin-top: var(--space-xl); }
.hero-proof div, .hero-card, .panel, .subject-table-block, .principle-card, .step, .price-card, .policy-box, details, .referral-card, .callout { border: 1px solid var(--color-border); background: rgba(255, 255, 255, 0.055); box-shadow: var(--shadow-card); }
.hero-proof div { padding: var(--space-sm); border-radius: var(--radius-md); }
.hero-proof strong { display: block; color: var(--color-heading); line-height: 1.25; }
.hero-proof span { display: block; margin-top: var(--space-3xs); color: var(--color-text-muted); font-size: 0.9rem; line-height: 1.45; }
.hero-card, .panel, .subject-table-block, .principle-card, .step, .price-card, .policy-box, .referral-card, .callout { padding: var(--space-lg); border-radius: var(--radius-lg); }
.hero-card { background: linear-gradient(145deg, rgba(143, 182, 255, 0.14), rgba(255, 255, 255, 0.05)), var(--color-bg-card); }
.check-list { padding-left: 0; list-style: none; }
.check-list li { position: relative; padding-left: 1.8rem; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--color-success); font-weight: 900; }
.text-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-md) var(--space-xl); margin-top: var(--space-lg); }
.text-grid p { margin: 0; }
.callout { margin-top: var(--space-lg); background: linear-gradient(135deg, rgba(143, 182, 255, 0.12), rgba(246, 217, 133, 0.06)), var(--color-bg-card); }
.callout p { margin: 0; color: var(--color-text); font-weight: 700; }
.subject-dropdowns { display: grid;  gap: var(--space-md);}
.subject-dropdown {
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.subject-dropdown summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg);
  cursor: pointer;
  list-style: none;
}

.subject-dropdown summary::-webkit-details-marker {
  display: none;
}

.subject-dropdown summary::after {
  content: "+";
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  flex: 0 0 auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-heading);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
}

.subject-dropdown[open] summary::after {
  content: "−";
}

.subject-dropdown summary strong {
  display: block;
  color: var(--color-heading);
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.subject-dropdown .stream-label {
  display: block;
  margin-bottom: var(--space-2xs);
}

.subject-dropdown .table-scroll {
  padding: 0 var(--space-lg) var(--space-lg);
}
.subject-table-block { margin-top: var(--space-lg); background: var(--color-bg-card); }
.subject-table-block:first-of-type { margin-top: 0; }
.subject-table-heading { margin-bottom: var(--space-md); }
.subject-table-heading h3 { font-size: clamp(1.45rem, 2.5vw, 2rem); }
.table-scroll { overflow-x: auto; }
.subject-table { width: 100%; min-width: 860px; border-collapse: collapse; }
.subject-table th, .subject-table td { padding: var(--space-sm); border: 1px solid var(--color-border); text-align: left; vertical-align: top; }
.subject-table th { color: var(--color-heading); background: rgba(255, 255, 255, 0.08); font-size: 0.92rem; }
.subject-table td { color: var(--color-text-muted); }
.subject-table td:first-child { width: 10rem; color: var(--color-heading); }
.subject-table td strong { color: var(--color-heading); }
.principle-grid, .steps, .pricing-grid, .faq-grid { display: grid; gap: var(--space-md); }
.principle-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.steps { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.pricing-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.principle-card, .step, .price-card, .panel, .referral-card { background: var(--color-bg-card); }
.step-number { display: inline-flex; margin-bottom: var(--space-md); color: var(--color-accent); font-weight: 900; letter-spacing: 0.08em; }
.split, .referral-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr); gap: var(--space-xl); align-items: center; }
.price { margin: var(--space-md) 0 0; color: var(--color-heading); font-size: 3rem; font-weight: 900; line-height: 1; letter-spacing: -0.05em; }
.price-note { color: var(--color-accent); font-weight: 700; }
.policy-box { margin-top: var(--space-md); background: rgba(255, 255, 255, 0.045); }
details { padding: var(--space-md); border-radius: var(--radius-md); background: var(--color-bg-card); }
summary { cursor: pointer; color: var(--color-heading); font-weight: 800; }
details p { margin-top: var(--space-sm); margin-bottom: 0; }
.referral-section { background: radial-gradient(circle at top left, rgba(246, 217, 133, 0.12), transparent 24rem), radial-gradient(circle at bottom right, rgba(143, 182, 255, 0.14), transparent 24rem); }
.small-note { margin-top: var(--space-md); font-size: 0.92rem; }
.final-cta { text-align: center; }
.site-footer { border-top: 1px solid var(--color-border); padding-block: var(--space-lg); background: rgba(0, 0, 0, 0.16); }
.footer-inner { display: flex; justify-content: space-between; gap: var(--space-md); align-items: center; }
.footer-inner p { margin: 0; }
.footer-inner a { color: var(--color-text-muted); text-decoration: none; font-weight: 700; }
.footer-inner a:hover { color: var(--color-text); }
@media (max-width: 920px) {
  .nav-toggle { display: block; }
  .nav-links { position: absolute; top: var(--mobile-menu-top); left: var(--container-padding); right: var(--container-padding); display: none; flex-direction: column; align-items: stretch; padding: var(--space-md); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg-soft); box-shadow: var(--shadow-card); }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: var(--space-xs); }
  .nav-links .nav-cta { text-align: center; }
  .hero-grid, .split, .referral-grid { grid-template-columns: 1fr; }
  .hero-proof, .text-grid, .steps, .pricing-grid, .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .principle-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  :root { --container-padding: 1rem; --space-3xl: 4rem; --logo-height: 3rem; --logo-max-width: 280px; --nav-height: 4.8rem; --mobile-menu-top: 4.8rem; }
  .hero-proof, .text-grid, .principle-grid, .steps, .pricing-grid, .faq-grid { grid-template-columns: 1fr; }
  .hero-actions, .center-actions { flex-direction: column; }
  .button { width: 100%; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

.fees-table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--space-xl);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.fees-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

.fees-table th,
.fees-table td {
  padding: var(--space-md);
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-width) solid var(--color-border);
}

.fees-table th {
  color: var(--color-text);
  background: var(--color-primary-soft);
  font-size: var(--font-size-sm);
  font-weight: 900;
}

.fees-table td {
  color: var(--color-text-muted);
}

.fees-table td strong {
  color: var(--color-text);
}

.fees-table tbody tr:last-child td {
  border-bottom: none;
}

.lesson-options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.info-card,
.recommendation-box {
  padding: var(--space-lg);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.info-card h3,
.recommendation-box h3 {
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-lg);
}

.info-card ul {
  display: grid;
  gap: var(--space-xs);
  color: var(--color-text-muted);
}

.recommendation-box {
  background: var(--color-primary-soft);
  box-shadow: none;
}

.recommendation-box p:last-child {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .lesson-options-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .fees-table th,
  .fees-table td {
    padding: var(--space-sm);
  }

  .info-card,
  .recommendation-box {
    padding: var(--space-md);
  }

.compact-heading {
  margin-bottom: var(--space-lg);
}

.qa-compact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-sm);
}

.qa-compact-item {
  padding: var(--space-sm) var(--space-md);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.qa-compact-item h3 {
  margin-bottom: var(--space-2xs);
  color: var(--color-text);
  font-size: var(--font-size-base);
  line-height: 1.25;
}

.qa-compact-item p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.45;
}

@media (max-width: 760px) {
  .qa-compact-grid {
    grid-template-columns: 1fr;
  }
}