/* ══════════════════════════════════
     RESET & BASE
  ══════════════════════════════════ */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    min-height: 100vh;
    transition: background 0.5s ease, color 0.4s ease;
    overflow-x: hidden;
  }
  /* Background texture */
  body::before {
    content: '';
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background-image: repeating-linear-gradient(-55deg, transparent, transparent 50px, rgba(255,255,255,0.008) 50px, rgba(255,255,255,0.008) 51px);
  }
  /* Bloom blobs */
  .bg-blob-1 {
    position: fixed; width: 600px; height: 600px; top: -200px; right: -180px; z-index: 0;
    background: radial-gradient(ellipse, var(--accent-dim) 0%, transparent 65%);
    border-radius: 60% 40% 70% 30%/50% 60% 40% 50%;
    pointer-events: none;
    animation: blobFloat 12s ease-in-out infinite alternate;
    transition: background 0.5s;
  }
  .bg-blob-2 {
    position: fixed; width: 400px; height: 400px; bottom: -100px; left: -80px; z-index: 0;
    background: radial-gradient(ellipse, var(--gold-dim) 0%, transparent 65%);
    border-radius: 40% 60% 30% 70%;
    pointer-events: none;
    transition: background 0.5s;
  }
  @keyframes blobFloat {
    0%   { border-radius: 60% 40% 70% 30%/50% 60% 40% 50%; transform: translate(0,0); }
    100% { border-radius: 40% 60% 30% 70%/60% 40% 60% 40%; transform: translate(-20px, 20px); }
  }
  /* Leap grid overlay */
  [data-theme="leap"] body::after {
    content: '';
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
    background-image: linear-gradient(rgba(58,134,255,0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(58,134,255,0.02) 1px, transparent 1px);
    background-size: 36px 36px;
  }
  /* Leap left stripe */
  .leap-stripe {
    position: fixed; top: 0; left: 0; bottom: 0; width: 4px; z-index: 100;
    background: linear-gradient(180deg, #e84855, #3a86ff, #e84855);
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
  }
  [data-theme="leap"] .leap-stripe { opacity: 1; }
  /* ══════════════════════════════════
     CSS VARIABLES — BOTH THEMES
  ══════════════════════════════════ */
  :root {
    --accent:       #52b788;
    --accent-dim:   rgba(82,183,136,0.15);
    --accent-border:rgba(82,183,136,0.25);
    --bg:           #1b3a2d;
    --bg-card:      rgba(255,255,255,0.025);
    --bg-deep:      #132b20;
    --text:         #d8f3dc;
    --text-dim:     rgba(216,243,220,0.45);
    --text-muted:   rgba(216,243,220,0.22);
    --gold:         #e9c46a;
    --gold-dim:     rgba(233,196,106,0.12);
    --gold-border:  rgba(233,196,106,0.25);
    --warn:         #e84855;
    --warn-dim:     rgba(232,72,85,0.1);
    --warn-border:  rgba(232,72,85,0.25);
    --stripe:       none;
    --font-display: 'Fraunces', serif;
    --font-ui:      'Outfit', sans-serif;
    --font-body:    'Plus Jakarta Sans', sans-serif;
    --font-code:    'Space Mono', monospace;
    --border-radius-card: 6px;
    --section-num-bg: rgba(82,183,136,0.1);
    --section-num-border: rgba(82,183,136,0.22);
    --section-num-color: var(--accent);
    --hero-title-color: var(--text);
    --hero-em-color: var(--accent);
    --tag-bg: rgba(82,183,136,0.1);
    --tag-border: rgba(82,183,136,0.28);
    --tag-color: var(--accent);
    --accordion-arrow: var(--accent);
  }
  [data-theme="leap"] {
    --accent:       #3a86ff;
    --accent-dim:   rgba(58,134,255,0.12);
    --accent-border:rgba(58,134,255,0.28);
    --bg:           #0b1f3a;
    --bg-card:      rgba(255,255,255,0.025);
    --bg-deep:      #061529;
    --text:         #f0f4ff;
    --text-dim:     rgba(240,244,255,0.45);
    --text-muted:   rgba(240,244,255,0.22);
    --gold:         #ffbe0b;
    --gold-dim:     rgba(255,190,11,0.08);
    --gold-border:  rgba(255,190,11,0.3);
    --warn:         #e84855;
    --warn-dim:     rgba(232,72,85,0.08);
    --warn-border:  rgba(232,72,85,0.28);
    /*--font-display: 'Syne', sans-serif;*/
    --font-ui:      'Outfit', sans-serif;
    --font-body:    'Plus Jakarta Sans', sans-serif;
    --font-code:    'Space Mono', monospace;
    --border-radius-card: 4px;
    --section-num-bg: rgba(58,134,255,0.1);
    --section-num-border: rgba(58,134,255,0.22);
    --section-num-color: var(--accent);
    --hero-title-color: var(--text);
    --hero-em-color: var(--accent);
    --tag-bg: rgba(58,134,255,0.1);
    --tag-border: rgba(58,134,255,0.28);
    --tag-color: var(--accent);
    --accordion-arrow: var(--accent);
  }
  /* ══════════════════════════════════
     NAVBAR
  ══════════════════════════════════ */
  nav {
    position: sticky; 
    top: 0; 
    z-index: 200;
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--accent-border);
    padding: 0 40px;
    display: flex; 
    align-items: center; 
    justify-content: space-between;
    height: 60px;
    transition: border-color 0.4s;
  }
  .nav-brand {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 20px;
    color: var(--text);
    transition: font-family 0.1s;
  }
  .nav-brand em { 
    font-style: italic; 
    color: var(--accent); 
    transition: color 0.4s; 
  }
  [data-theme="leap"] .nav-brand { 
    font-family: var(--font-display); 
    font-weight: 300; 
    font-size: 20px; 
    text-transform: capitalize; 
  }
  [data-theme="leap"] .nav-brand em { font-style: italic; }
  .nav-right { 
    display: flex; 
    align-items: center; 
    gap: 16px; 
  }
  .nav-contact {
    font-family: var(--font-ui); 
    font-size: 9px; 
    font-weight: 300;
    letter-spacing: 0.3em; 
    color: var(--text-muted); 
    text-transform: uppercase;
  }
  /* Theme switcher */
  .theme-switcher {
    display: flex; 
    align-items: center; 
    gap: 0;
    background: rgba(0,0,0,0.3); 
    border: 1px solid var(--accent-border);
    border-radius: 100px; 
    padding: 3px; 
    transition: border-color 0.4s;
  }
  .theme-btn {
    padding: 5px 14px; 
    border-radius: 100px; 
    border: none;
    font-family: var(--font-ui); 
    font-size: 9px; 
    font-weight: 300;
    letter-spacing: 0.3em; 
    text-transform: uppercase; 
    cursor: pointer;
    background: transparent; 
    color: var(--text-muted);
    transition: all 0.3s;
  }
  .theme-btn.active {
    background: var(--accent); 
    color: var(--bg);
    font-weight: 600;
  }
  /* ══════════════════════════════════
     HERO SECTION
  ══════════════════════════════════ */
  .hero {
    position: relative; 
    z-index: 1;
    padding: 80px 60px 60px;
    max-width: 1400px; 
    margin: 0 auto;
    display: flex; 
    flex-direction: column; 
    gap: 20px;
  }
  .hero-eyebrow {
    font-family: var(--font-ui); 
    font-size: 9px; 
    font-weight: 300;
    letter-spacing: 0.55em; 
    color: var(--accent); 
    text-transform: uppercase; 
    opacity: 0.65;
    display: flex; 
    align-items: center; 
    gap: 10px;
    animation: fadeUp 0.6s cubic-bezier(0.22,1,0.36,1) both;
  }
  .hero-eyebrow::before { 
    content:''; 
    width: 20px; 
    height: 1px; 
    background: var(--accent); 
    opacity: 0.6; 
  }
  .hero-title {
    font-family: var(--font-display);
    font-weight: 700; 
    font-size: 64px; 
    line-height: 0.92;
    letter-spacing: -0.02em;
    color: var(--hero-title-color);
    animation: fadeUp 0.7s 0.05s cubic-bezier(0.22,1,0.36,1) both;
  }
  .hero-title em { 
    font-style: italic; 
    color: var(--hero-em-color); 
  }
  [data-theme="leap"] .hero-title { 
    font-family: var(--font-display); 
    font-weight: 700; 
    letter-spacing: -0.03em; 
  }
  [data-theme="leap"] .hero-title em { 
    font-style: italic; 
    text-transform: capitalize; 
  }
  .hero-sub {
    font-family: var(--font-display); 
    font-style: italic; 
    font-size: 15px; 
    font-weight: 300;
    color: var(--text-dim); 
    letter-spacing: 0.02em; 
    max-width: 520px;
    animation: fadeUp 0.7s 0.1s cubic-bezier(0.22,1,0.36,1) both;
  }
  [data-theme="leap"] .hero-sub { 
    font-family: var(--font-display); 
    font-style: italic; 
    font-weight: 300; 
    font-size: 15px; 
    letter-spacing: 0.06em; 
  }
  .hero-meta {
    display: flex; 
    align-items: center; 
    gap: 20px; 
    flex-wrap: wrap;
    animation: fadeUp 0.7s 0.15s cubic-bezier(0.22,1,0.36,1) both;
  }
  .hero-badge {
    display: flex; 
    align-items: center; 
    gap: 8px;
    padding: 8px 20px;
    background: var(--accent-dim); 
    border: 1px solid var(--accent-border);
    border-radius: 100px;
    font-family: var(--font-ui); 
    font-size: 9px; 
    font-weight: 300;
    letter-spacing: 0.35em; 
    color: var(--accent); 
    text-transform: uppercase;
  }
  .hero-badge-dot {
    width: 6px; 
    height: 6px; 
    background: var(--accent); 
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
    animation: pulse 2s ease-in-out infinite;
  }
  @keyframes pulse { 0%,100% { box-shadow: 0 0 5px currentColor; } 50%{ box-shadow: 0 0 16px currentColor, 0 0 28px currentColor; } }
  .hero-contact {
    font-family: var(--font-ui); 
    font-size: 10px; 
    font-weight: 300;
    color: var(--text-muted); 
    letter-spacing: 0.15em;
  }
  .hero-cta {
    display: inline-flex; 
    align-items: center; 
    gap: 10px;
    padding: 12px 28px;
    font-family: var(--font-ui); 
    font-size: 9px; 
    font-weight: 300;
    letter-spacing: 0.45em; 
    text-transform: uppercase;
    cursor: pointer; 
    border-radius: 3px; 
    text-decoration: none;
    transition: all 0.3s;
  }
  .hero-cta.primary {
    background: var(--accent); 
    color: var(--bg); 
    border: none;
    font-weight: 600;
  }
  .hero-cta.primary:hover { 
    opacity: 0.88; 
    transform: translateY(-2px); 
  }
  [data-theme="leap"] .hero-cta.primary { 
    font-family: 'Syne', sans-serif; 
    font-weight: 700; 
    background: linear-gradient(135deg, #e84855, #c1121f); 
    color: #fff; 
    box-shadow: 0 4px 20px rgba(232,72,85,0.3); 
  }
  @keyframes fadeUp { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }
  /* ══════════════════════════════════
     MODULE STATS BAR
  ══════════════════════════════════ */
  .stats-bar {
    position: relative; 
    z-index: 1;
    max-width: 1400px; 
    margin: 0 auto;
    padding: 0 60px 50px;
    display: flex; 
    gap: 0;
    animation: fadeUp 0.7s 0.2s cubic-bezier(0.22,1,0.36,1) both;
  }
  .stat-item {
    flex: 1; 
    padding: 20px 24px;
    border-top: 1px solid var(--accent-border);
    transition: border-color 0.4s;
  }
  .stat-item:first-child { 
    border-left: 1px solid var(--accent-border); 
  }
  .stat-num {
    font-family: var(--font-display); 
    font-size: 36px; 
    font-weight: 700;
    color: var(--accent); 
    line-height: 1;
    transition: color 0.4s;
  }
  [data-theme="leap"] .stat-num { 
    font-family: var(--font-display); 
    font-weight: 800; 
  }
  .stat-label {
    font-family: var(--font-ui); 
    font-size: 11px; 
    font-weight: 300;
    letter-spacing: 0.4em; 
    color: var(--text-muted); 
    text-transform: uppercase; margin-top: 6px;
  }
  /* ══════════════════════════════════
     CURRICULUM ACCORDION SECTION
  ══════════════════════════════════ */
  .curriculum {
    position: relative; z-index: 1;
    max-width: 1400px; margin: 0 auto;
    padding: 0 60px 100px;
  }
  .curriculum-heading {
    font-family: var(--font-ui); 
    font-size: 11px; 
    font-weight: 300;
    letter-spacing: 0.55em;
    color: var(--text-muted); 
    text-transform: uppercase;
    margin-bottom: 24px;
    display: flex; 
    align-items: center; 
    gap: 16px;
  }
  .curriculum-heading::after { 
    content:''; 
    flex: 1; 
    height: 1px; 
    background: var(--accent-border); 
  }
  .curriculum-title {
    font-family: var(--font-display); 
    font-weight: 700; 
    font-size: 30px;
    line-height: 1.2; 
    letter-spacing: -0.01em;
    color: var(--text); 
    margin-bottom: 12px;
  }
  [data-theme="leap"] .curriculum-title { 
    font-weight: 800; 
    letter-spacing: -0.015em; 
  }
  .curriculum-sub {
    font-family: var(--font-body); 
    font-weight: 300; 
    font-size: 13.5px;
    line-height: 1.7; 
    color: var(--text-dim); 
    max-width: 560px;
    margin-bottom: 28px;
  }
  [data-theme="leap"] .curriculum-sub { 
    font-family: var(--font-ui); 
    letter-spacing: 0.02em; 
  }
  /* ══════════════════════════════════
     ACCORDION SECTION
  ══════════════════════════════════ */
  .accordion { 
    display: flex; 
    flex-direction: column; 
    gap: 10px; 
  }
  .acc-item {
    background: var(--bg-card);
    border: 1px solid var(--accent-border);
    border-radius: var(--border-radius-card);
    overflow: hidden;
    transition: border-color 0.3s, box-shadow 0.3s;
  }
  [data-theme="leap"] .acc-item { 
    border-left: 3px solid var(--accent-border); 
    border-radius: 0 var(--border-radius-card) var(--border-radius-card) 0; 
  }
  .acc-item:hover { 
    border-color: var(--accent); 
    box-shadow: 0 8px 30px rgba(0,0,0,0.25); 
  }
  .acc-item.open { 
    border-color: var(--accent); 
    box-shadow: 0 12px 40px rgba(0,0,0,0.3); 
  }
  .acc-item.important-module { border-color: var(--gold-border); }
  .acc-item.important-module:hover { border-color: var(--gold); }
  .acc-item.important-module.open { border-color: var(--gold); }
  .acc-item.warn-module { border-color: var(--warn-border); }
  /* Accordion header */
  .acc-header {
    display: flex; 
    align-items: center; 
    gap: 16px;
    padding: 20px 24px; 
    cursor: pointer;
    transition: background 0.3s; 
    user-select: none;
  }
  .acc-header:hover { background: rgba(255,255,255,0.03); }
  .acc-module-num {
    font-family: var(--font-code); 
    font-size: 10px;
    color: var(--accent); 
    background: var(--section-num-bg);
    border: 1px solid var(--section-num-border);
    border-radius: 4px; 
    padding: 3px 8px; 
    flex-shrink: 0;
    transition: all 0.3s;
  }
  [data-theme="leap"] .acc-module-num { border-radius: 3px; }
  .acc-item.important-module .acc-module-num { 
    color: var(--gold); 
    background: var(--gold-dim); 
    border-color: var(--gold-border); 
  }
  .acc-item.warn-module .acc-module-num { 
    color: var(--warn); 
    background: var(--warn-dim); 
    border-color: var(--warn-border); 
  }
  .acc-header-text { flex: 1; }
  .acc-title {
    font-family: var(--font-display); 
    font-weight: 400; 
    font-size: 18px;
    color: var(--text); 
    line-height: 1.2;
    transition: color 0.3s;
  }
  [data-theme="leap"] .acc-title { 
    font-family: var(--font-display); 
    font-weight: 400; font-size: 16px;  
    letter-spacing: 0.02em; 
  }
  .acc-item:hover .acc-title, .acc-item.open .acc-title { color: var(--accent); }
  .acc-item.important-module:hover .acc-title,
  .acc-item.important-module.open .acc-title { 
    color: var(--gold); 
  }
  .acc-subtitle {
    font-family: var(--font-body); 
    font-size: 11px; 
    font-weight: 300;
    color: var(--text-muted); 
    margin-top: 3px;
  }
  .acc-badges { 
    display: flex; gap: 6px; 
    flex-shrink: 0; 
    flex-wrap: wrap; 
    justify-content: flex-end; 
  }
  .acc-badge {
    padding: 3px 10px; 
    border-radius: 100px;
    font-family: var(--font-ui); 
    font-size: 7.5px; 
    font-weight: 300;
    letter-spacing: 0.35em; 
    text-transform: uppercase;
  }
  .acc-badge.lang { 
    background: var(--tag-bg); 
    border: 1px solid var(--tag-border); 
    color: var(--tag-color); 
  }
  .acc-badge.level-b { 
    background: rgba(82,183,136,0.08); 
    border: 1px solid rgba(82,183,136,0.2); 
    color: #52b788; 
  }
  .acc-badge.level-i { 
    background: var(--gold-dim); 
    border: 1px solid var(--gold-border); 
    color: var(--gold); 
  }
  .acc-arrow {
    width: 28px; 
    height: 28px; 
    border-radius: 50%; 
    flex-shrink: 0;
    background: var(--accent-dim); 
    border: 1px solid var(--accent-border);
    display: flex; 
    align-items: center; 
    justify-content: center;
    color: var(--accent); 
    font-size: 11px;
    transition: all 0.35s cubic-bezier(0.22,1,0.36,1);
  }
  .acc-item.open .acc-arrow { 
    transform: rotate(180deg); 
    background: var(--accent); 
    color: var(--bg); 
  }
  /* Accordion body */
  .acc-body {
    display: none; 
    padding: 0 24px 24px;
    border-top: 1px solid var(--accent-border);
    animation: accFade 0.35s cubic-bezier(0.22,1,0.36,1);
  }
  .acc-item.open .acc-body { display: block; }
  @keyframes accFade { from { opacity:0; transform:translateY(-8px); } to { opacity:1; transform:translateY(0); } }
  .acc-note {
    font-family: var(--font-display); 
    font-style: italic; 
    font-size: 12px;
    color: var(--text-muted); 
    padding: 16px 0 12px; 
    letter-spacing: 0.02em;
    border-bottom: 1px solid rgba(255,255,255,0.05); 
    margin-bottom: 16px;
  }
  [data-theme="leap"] .acc-note { 
    font-family: var(--font-ui); 
    font-style: normal; 
    font-size: 11px; 
    letter-spacing: 0.05em; 
  }
  /* Topics grid */
  .topics-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 14px; 
  }
  .topic-group.full { grid-column: 1 / -1; }
  .topic-group { 
    display: flex; 
    flex-direction: column; 
    gap: 8px; 
  }
  .topic-group-title {
    font-family: var(--font-ui); 
    font-size: 8px; 
    font-weight: 300;
    letter-spacing: 0.5em; 
    color: var(--accent); 
    text-transform: uppercase; 
    opacity: 0.6;
    display: flex; 
    align-items: center; 
    gap: 8px;
  }
  .topic-group-title::before {
    content: '';
    width: 14px; 
    height: 1px; 
    background: var(--accent); 
    opacity: 0.5;
  }
  .acc-item.important-module .topic-group-title { color: var(--gold); }
  .acc-item.important-module .topic-group-title::before { background: var(--gold); }
  .topic-tags { 
    display: flex; 
    flex-wrap: wrap; 
    gap: 6px; 
  }
  .topic-tag {
    font-family: var(--font-body); 
    font-size: 10.5px; 
    font-weight: 300;
    color: var(--text-dim); 
    padding: 4px 11px;
    background: rgba(255,255,255,0.03); 
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 3px; 
    line-height: 1.4;
    transition: border-color 0.2s, color 0.2s;
  }
  .topic-tag:hover { 
    border-color: var(--accent-border); 
    color: var(--text); 
  }
  .topic-tag.code {
    font-family: var(--font-code); 
    font-size: 9.5px;
    color: var(--accent); 
    background: var(--accent-dim); 
    border-color: var(--accent-border);
  }
  .topic-tag.gold { 
    color: rgba(233,196,106,0.75); 
    background: var(--gold-dim); 
    border-color: var(--gold-border); 
  }
  .topic-tag.red  { 
    color: rgba(232,72,85,0.72); 
    background: var(--warn-dim); 
    border-color: var(--warn-border); 
  }
  [data-theme="leap"] .topic-tag.gold { color: rgba(255,190,11,0.75); }
  /* Important notice */
  .important-notice {
    display: flex; 
    align-items: center; 
    gap: 10px;
    padding: 10px 14px; 
    margin-bottom: 14px;
    background: var(--gold-dim); 
    border: 1px solid var(--gold-border); 
    border-radius: 4px;
    font-family: var(--font-ui); 
    font-size: 9.5px; 
    font-weight: 300;
    color: var(--gold); 
    letter-spacing: 0.08em;
  }
  .warn-notice {
    display: flex; 
    align-items: center; 
    gap: 10px;
    padding: 10px 14px; 
    margin-bottom: 14px;
    background: var(--warn-dim); 
    border: 1px solid var(--warn-border); 
    border-radius: 4px;
    font-family: var(--font-ui); 
    font-size: 9.5px; 
    font-weight: 300;
    color: rgba(232,72,85,0.8); 
    letter-spacing: 0.08em;
  }
  /* Box model diagram inside accordion */
  .box-model {
    display: flex; 
    justify-content: center; 
    align-items: center;
    padding: 16px 0 4px;
  }
  .bm-margin { 
    border: 1.5px dashed var(--gold-border); 
    padding: 10px; 
    border-radius: 4px; 
    position: relative; 
  }
  .bm-margin-lbl { 
    position: absolute; 
    top: -9px; 
    left: 10px; 
    font-family: var(--font-code); 
    font-size: 8px; 
    color: var(--gold); 
    background: var(--bg); 
    padding: 0 4px; 
    opacity: 0.7; 
  }
  .bm-border-box { 
    border: 1.5px solid var(--accent-border); 
    padding: 10px; 
    border-radius: 3px; 
    position: relative; 
  }
  .bm-border-lbl { 
    position: absolute; 
    top: -9px; 
    left: 10px; 
    font-family: var(--font-code); 
    font-size: 8px; 
    color: var(--accent); 
    background: var(--bg); 
    padding: 0 4px; 
    opacity: 0.8; 
  }
  .bm-padding { 
    border: 1.5px dashed rgba(255,255,255,0.12); 
    padding: 10px; 
    border-radius: 2px; 
    position: relative; 
  }
  .bm-padding-lbl { 
    position: absolute; 
    top: -9px; 
    left: 10px; 
    font-family: var(--font-code); 
    font-size: 8px; 
    color: var(--text-muted); 
    background: var(--bg); 
    padding: 0 4px; 
  }
  .bm-content { 
    background: var(--accent-dim); 
    border: 1px solid var(--accent-border); 
    padding: 8px 28px;
    border-radius: 2px; 
    font-family: var(--font-code); 
    font-size: 9px; 
    color: var(--accent);
  }
  /* Code snippet */
  .code-block {
    margin-top: 12px; 
    background: rgba(0,0,0,0.4);
    border: 1px solid rgba(255,255,255,0.06); 
    border-radius: 4px;
    padding: 14px 16px; 
    display: flex; 
    flex-direction: column; 
    gap: 2px;
  }
  .code-line { 
    font-family: var(--font-code); 
    font-size: 9px; 
    line-height: 1.75; 
  }
  .code-line .kw  { color: var(--gold); }
  .code-line .fn  { color: var(--accent); }
  .code-line .str { color: rgba(216,243,220,0.6); }
  .code-line .cm  { color: var(--text-muted); }
  .code-line .num { color: rgba(233,196,106,0.55); }
  .code-line .pl  { color: var(--text-dim); }
  [data-theme="leap"] .code-line .kw  { color: #e84855; }
  [data-theme="leap"] .code-line .str { color: rgba(255,190,11,0.7); }
  [data-theme="leap"] .code-line .num { color: rgba(199,125,255,0.65); }
  /* ══════════════════════════════════
     PRICING SECTION
  ══════════════════════════════════ */
  .pricing {
    position: relative; 
    z-index: 1;
    max-width: 1400px; 
    margin: 0 auto;
    padding: 0 60px 100px;
  }
  .pricing-info {
    display: flex; 
    align-items: stretch;
    background: var(--bg-card);
    border: 1px solid var(--accent-border);
    border-radius: var(--border-radius-card);
    margin-bottom: 28px;
    overflow: hidden;
  }
  .pricing-rate {
    padding: 26px 30px;
    display: flex; 
    flex-direction: column; 
    justify-content: center;
    flex: 1.1;
  }
  .pricing-rate-num {
    font-family: var(--font-display); 
    font-weight: 700; font-size: 38px;
    color: var(--accent); 
    line-height: 1;
  }
  .pricing-rate-label {
    font-family: var(--font-body); 
    font-weight: 300; 
    font-size: 12.5px;
    line-height: 1.6; 
    color: var(--text-dim); 
    margin-top: 8px;
  }
  .hours-divider { 
    width: 1px; 
    background: var(--accent-border); 
  }
  .hours-table {
    padding: 26px 30px;
    flex: 1.4;
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    gap: 10px;
  }
  .hours-heading {
    font-family: var(--font-ui); 
    font-weight: 600; 
    font-size: 10px;
    letter-spacing: 0.18em; 
    text-transform: uppercase;
    color: var(--text-muted); 
    margin-bottom: 4px;
  }
  .hours-row {
    display: flex; 
    align-items: baseline; 
    justify-content: space-between; 
    gap: 16px;
    flex-wrap: wrap;
  }
  .hours-day {
    font-family: var(--font-ui); 
    font-weight: 500; 
    font-size: 13px;
    color: var(--text);
  }
  .hours-time {
    font-family: var(--font-code); 
    font-size: 12px;
    color: var(--accent);
  }
  .hours-time em { 
    font-style: normal; 
    color: var(--text-muted); 
    margin: 0 2px; 
  }
  @media (max-width: 640px) {
    .pricing-info { flex-direction: column; }
    
    .hours-divider { 
      width: auto; 
      height: 1px; 
    }
  }
  [data-theme="leap"] .pricing-rate-num { font-weight: 800; }
  [data-theme="leap"] .hours-heading { letter-spacing: 0.22em; }
  .price-grid {
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 14px;
  }
  .price-card {
    background: var(--bg-card);
    border: 1px solid var(--accent-border);
    border-radius: var(--border-radius-card);
    padding: 28px 24px;
    display: flex; 
    flex-direction: column;
    transition: border-color 0.3s, box-shadow 0.3s;
  }
  .price-card:hover { 
    border-color: var(--accent); 
    box-shadow: 0 8px 30px rgba(0,0,0,0.25); 
  }
  .price-card.featured {
    border-color: var(--accent);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    position: relative;
  }
  .price-card.featured::before {
    content: 'Most Popular';
    position: absolute; 
    top: -11px; 
    left: 24px;
    background: var(--accent); 
    color: var(--bg);
    font-family: var(--font-ui); 
    font-size: 7.5px; 
    font-weight: 600;
    letter-spacing: 0.25em; 
    text-transform: uppercase;
    padding: 4px 10px; 
    border-radius: 100px;
  }
  .price-tier {
    font-family: var(--font-code); 
    font-size: 10px;
    color: var(--accent); 
    background: var(--section-num-bg);
    border: 1px solid var(--section-num-border);
    border-radius: 4px; 
    padding: 3px 8px;
    display: inline-block; 
    width: fit-content;
  }
  .price-tier-sub {
    font-family: var(--font-body); 
    font-size: 11px; 
    font-weight: 300;
    color: var(--text-muted); 
    margin-top: 10px;
  }
  .price-amount {
    font-family: var(--font-display); 
    font-weight: 700; 
    font-size: 34px;
    color: var(--accent); 
    margin-top: 20px; 
    line-height: 1;
  }
  .price-amount span {
    display: block;
    font-family: var(--font-ui); 
    font-weight: 300; 
    font-size: 9px;
    letter-spacing: 0.2em; 
    text-transform: uppercase;
    color: var(--text-muted); 
    margin-top: 8px;
  }
  .price-features {
    list-style: none; 
    margin-top: 22px; 
    margin-bottom: 24px;
    display: flex; 
    flex-direction: column; 
    gap: 10px; 
    flex: 1;
  }
  .price-features li {
    font-family: var(--font-body); 
    font-size: 11.5px; 
    font-weight: 300;
    color: var(--text-dim);
    display: flex; 
    align-items: flex-start; 
    gap: 8px;
  }
  .price-features li::before {
    content: '✓'; 
    color: var(--accent); 
    font-family: var(--font-code);
    font-size: 10px; 
    flex-shrink: 0; 
    margin-top: 1px;
  }
  .price-cta { 
    width: 100%; 
    justify-content: center;
    margin: 20px auto;
  }
  [data-theme="leap"] .price-tier { border-radius: 3px; }
  [data-theme="leap"] .price-amount { font-weight: 800; }
  /* ══════════════════════════════════
     PARTNERS SECTION
  ══════════════════════════════════ */
  .partners {
    position: relative; 
    z-index: 1;
    max-width: 1400px; 
    margin: 0 auto;
    padding: 0 60px 100px;
  }
  .partners-note {
    font-family: var(--font-display); 
    font-weight: 700; 
    font-size: 30px;
    line-height: 1.2; 
    letter-spacing: -0.01em;
    color: var(--text); 
    max-width: 620px;
    margin-bottom: 12px;
  }
  /* ══════════════════════════════════
     ADVANCED CURRICULUM SECTION
     (Reuses .accordion / .acc-item / .topic-tag etc. from _accordion.css)
  ══════════════════════════════════ */
  .advanced-curriculum {
    position: relative; 
    z-index: 1;
    max-width: 1400px; 
    margin: 0 auto;
    padding: 0 60px 100px;
  }
  /* ══════════════════════════════════
     FOOTER
  ══════════════════════════════════ */
  footer {
    position: relative; 
    z-index: 1;
    border-top: 1px solid var(--accent-border);
    padding: 48px 60px;
    max-width: 1400px; 
    margin: 0 auto;
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    transition: border-color 0.4s;
  }
  .footer-brand {
    font-family: var(--font-display); 
    font-weight: 300; 
    font-size: 24px; 
    color: var(--text);
  }
  .footer-brand em { 
    font-style: italic; 
    color: var(--accent); 
  }
  [data-theme="leap"] .footer-brand { 
    font-family: var(--font-display); 
    font-weight: 300; 
    font-size: 24px; 
    text-transform: capitalize; 
    letter-spacing: 0.05em; 
  }
  [data-theme="leap"] .footer-brand em { font-style: italic; }
  .footer-by { 
    font-family: var(--font-ui); 
    font-size: 9px; 
    font-weight: 300; 
    letter-spacing: 0.3em; 
    color: var(--text-muted); 
    text-transform: uppercase; 
    margin-top: 4px; 
  }
  .footer-contact { 
    text-align: right; 
    display: flex; 
    flex-direction: column; 
    gap: 5px; 
  }
  .footer-contact-item { 
    font-family: var(--font-ui); 
    font-size: 11px; 
    font-weight: 300; 
    color: var(--text-muted); 
    letter-spacing: 0.1em; 
  }
  .footer-cta {
    margin-top: 10px; 
    padding: 10px 24px;
    background: var(--accent); 
    color: var(--bg); 
    border: none;
    font-family: var(--font-ui); 
    font-size: 8px; 
    font-weight: 600;
    letter-spacing: 0.4em; 
    text-transform: uppercase;
    cursor: pointer; 
    border-radius: 3px;
    transition: opacity 0.3s, transform 0.3s;
  }
  .footer-cta:hover { 
    opacity: 0.85; 
    transform: translateY(-2px); 
  }
  [data-theme="leap"] .footer-cta { 
    background: linear-gradient(135deg, #e84855, #c1121f); 
    color: #fff; 
    font-family: 'Syne', sans-serif; 
    font-weight: 700; 
    box-shadow: 0 4px 18px rgba(232,72,85,0.3); 
  }
  /* ══════════════════════════════════════════════════════
   RESPONSIVE STYLES — Tablet (≤768px) & Mobile (≤480px)
   Add this block at the bottom of your existing CSS,
   inside the same <style> tag.
══════════════════════════════════════════════════════ */
  /* ── TABLET  ≤768px ───────────────────────────────── */
  @media (max-width: 768px) {
  /* NAVBAR */
  nav {
    padding: 0 24px;
    height: auto;
    min-height: 60px;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .nav-contact {
    display: none; /* hidden on tablet, shown only on desktop */
  }

  .nav-right {
    gap: 10px;
  }

  .theme-btn {
    padding: 5px 10px;
    font-size: 8px;
    letter-spacing: 0.2em;
  }

  /* HERO */
  .hero {
    padding: 52px 32px 44px;
    gap: 16px;
  }

  .hero-title {
    font-size: 48px;
    line-height: 0.94;
  }

  .hero-sub {
    font-size: 14px;
    max-width: 100%;
  }

  .hero-meta {
    gap: 12px;
  }

  .hero-contact {
    font-size: 9px;
    letter-spacing: 0.1em;
  }

  /* STATS BAR */
  .stats-bar {
    padding: 0 32px 36px;
    flex-wrap: wrap;
  }

  .stat-item {
    flex: 1 1 calc(50% - 1px); /* 2-column grid */
    padding: 16px 20px;
  }

  .stat-item:nth-child(n) {
    border-left: none;
    border-top: 1px solid var(--accent-border);
  }

  .stat-item:nth-child(1),
  .stat-item:nth-child(2) {
    border-top: 1px solid var(--accent-border);
  }

  .stat-item:nth-child(odd) {
    border-left: 1px solid var(--accent-border);
  }

  .stat-num {
    font-size: 30px;
  }

  /* CURRICULUM / ACCORDION */
  .curriculum {
    padding: 0 32px 72px;
  }

  .acc-header {
    padding: 16px 20px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .acc-badges {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    margin-top: 4px;
  }

  .acc-arrow {
    order: 2;
    flex-shrink: 0;
  }

  .acc-header-text {
    order: 1;
  }

  .acc-title {
    font-size: 16px;
  }

  .acc-body {
    padding: 0 20px 20px;
  }

  .topics-grid {
    grid-template-columns: 1fr; /* single column on tablet */
    gap: 12px;
  }

  .topic-group.full {
    grid-column: 1; /* override the span since we're now 1 column */
  }

  /* FOOTER */
  footer {
    padding: 36px 32px;
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
  }

  .footer-contact {
    text-align: left;
    width: 100%;
  }

  .footer-cta {
    align-self: flex-start;
  }
}
  /* ── MOBILE  ≤480px ───────────────────────────────── */
  @media (max-width: 480px) {
  /* NAVBAR */
  nav {
    padding: 10px 16px;
    justify-content: space-between;
  }

  .nav-brand {
    font-size: 17px;
  }

  .theme-btn {
    padding: 4px 8px;
    font-size: 7.5px;
    letter-spacing: 0.15em;
  }

  /* Collapse theme label text for very small screens */
  .theme-btn:first-child::after {
    content: none;
  }

  /* HERO */
  .hero {
    padding: 36px 16px 32px;
    gap: 14px;
  }

  .hero-eyebrow {
    font-size: 8px;
    letter-spacing: 0.4em;
  }

  .hero-eyebrow::before {
    display: none;
  }

  .hero-title {
    font-size: 36px;
    line-height: 0.96;
    letter-spacing: -0.015em;
  }

  [data-theme="leap"] .hero-title {
    font-size: 34px;
  }

  .hero-sub {
    font-size: 13px;
    max-width: 100%;
  }

  .hero-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .hero-badge {
    padding: 7px 16px;
    font-size: 8px;
    letter-spacing: 0.25em;
  }

  .hero-contact {
    display: none; /* email is in footer, no need to repeat on mobile */
  }

  .hero-cta {
    width: 100%;
    justify-content: center;
    padding: 12px 20px;
    font-size: 8.5px;
    letter-spacing: 0.35em;
  }

  /* STATS BAR */
  .stats-bar {
    padding: 0 16px 28px;
  }

  .stat-item {
    flex: 1 1 calc(50% - 1px);
    padding: 14px 16px;
  }

  .stat-num {
    font-size: 26px;
  }

  .stat-label {
    font-size: 8px;
    letter-spacing: 0.3em;
  }

  /* CURRICULUM / ACCORDION */
  .curriculum {
    padding: 0 16px 52px;
  }

  .curriculum-heading {
    font-size: 8px;
    letter-spacing: 0.4em;
  }

  .accordion {
    gap: 8px;
  }

  .acc-header {
    padding: 14px 16px;
    gap: 10px;
  }

  .acc-module-num {
    font-size: 9px;
    padding: 2px 6px;
  }

  .acc-title {
    font-size: 14px;
  }

  .acc-subtitle {
    font-size: 10px;
  }

  .acc-badges {
    gap: 4px;
  }

  .acc-badge {
    font-size: 7px;
    letter-spacing: 0.25em;
    padding: 2px 8px;
  }

  .acc-arrow {
    width: 24px;
    height: 24px;
    font-size: 10px;
  }

  .acc-body {
    padding: 0 16px 18px;
  }

  .acc-note {
    font-size: 11px;
    padding: 12px 0 10px;
  }

  .topics-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .topic-group-title {
    font-size: 7.5px;
    letter-spacing: 0.35em;
  }

  .topic-tag {
    font-size: 9.5px;
    padding: 3px 9px;
  }

  .topic-tag.code {
    font-size: 8.5px;
  }

  .important-notice,
  .warn-notice {
    font-size: 9px;
    padding: 8px 12px;
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
  }

  /* Box model — scale down on small screens */
  .bm-margin {
    padding: 6px;
  }
  .bm-border-box {
    padding: 6px;
  }
  .bm-padding {
    padding: 6px;
  }
  .bm-content {
    padding: 6px 14px;
    font-size: 8px;
  }
  .bm-margin-lbl,
  .bm-border-lbl,
  .bm-padding-lbl {
    font-size: 7px;
  }

  /* Code blocks */
  .code-block {
    padding: 10px 12px;
  }

  .code-line {
    font-size: 8px;
    line-height: 1.65;
  }

  /* FOOTER */
  footer {
    padding: 28px 16px 40px;
    gap: 20px;
  }

  .footer-brand {
    font-size: 20px;
  }

  .footer-by {
    font-size: 8px;
    letter-spacing: 0.25em;
  }

  .footer-contact-item {
    font-size: 10px;
    letter-spacing: 0.06em;
  }

  .footer-cta {
    width: 100%;
    text-align: center;
    padding: 10px 20px;
    font-size: 7.5px;
    letter-spacing: 0.35em;
  }

  /* BACKGROUND BLOBS — reduce on mobile for performance */
  .bg-blob-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
  }

  .bg-blob-2 {
    width: 220px;
    height: 220px;
  }
}
  /* ══════════════════════════════════════════════════════
   SMALL DEVICES  ≤450px
   Covers everything above, plus the sections added after
   this file was first written (Pricing, Partners/Sponsors,
   Advanced Curriculum) which had no mobile rules at all —
   most importantly .price-grid, which was still a fixed
   3-column grid with no breakpoint anywhere.
══════════════════════════════════════════════════════ */
  @media (max-width: 450px) {
  /* NAVBAR */
  nav {
    padding: 8px 14px;
  }

  .nav-brand {
    font-size: 16px;
  }

  .theme-btn {
    padding: 4px 7px;
    font-size: 7px;
    letter-spacing: 0.12em;
  }

  /* HERO */
  .hero {
    padding: 32px 14px 28px;
    gap: 12px;
  }

  .hero-title {
    font-size: 32px;
  }

  [data-theme="leap"] .hero-title {
    font-size: 30px;
  }

  .hero-badge {
    padding: 6px 14px;
    font-size: 7.5px;
    letter-spacing: 0.2em;
  }

  .hero-cta {
    font-size: 8px;
    letter-spacing: 0.3em;
    padding: 11px 18px;
  }

  /* STATS BAR */
  .stats-bar {
    padding: 0 14px 24px;
  }

  .stat-item {
    padding: 12px 14px;
  }

  .stat-num {
    font-size: 22px;
  }

  .stat-label {
    font-size: 7.5px;
    letter-spacing: 0.22em;
  }

  /* CURRICULUM HEADING / TITLE / SUB
     (curriculum-title & curriculum-sub had no responsive
     rule at any breakpoint before this) */
  .curriculum,
  .pricing,
  .partners,
  .advanced-curriculum {
    padding: 0 14px 48px;
  }

  .curriculum-title {
    font-size: 22px;
    margin-bottom: 10px;
  }

  .curriculum-sub {
    font-size: 12px;
    line-height: 1.6;
    margin-bottom: 22px;
  }

  /* PRICING — the price-grid had NO responsive rule anywhere;
     it was still a fixed 3-column grid at every screen size */
  .pricing-info {
    margin-bottom: 20px;
  }

  .pricing-rate,
  .hours-table {
    padding: 18px 18px;
  }

  .pricing-rate-num {
    font-size: 28px;
  }

  .hours-heading {
    font-size: 9px;
    letter-spacing: 0.14em;
  }

  .hours-day {
    font-size: 11.5px;
  }

  .hours-time {
    font-size: 10.5px;
  }

  .price-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .price-card {
    padding: 22px 18px;
  }

  .price-card.featured::before {
    top: -10px;
    left: 18px;
    font-size: 7px;
  }

  .price-tier {
    font-size: 9px;
  }

  .price-tier-sub {
    font-size: 10px;
  }

  .price-amount {
    font-size: 28px;
    margin-top: 16px;
  }

  .price-amount span {
    font-size: 8px;
  }

  .price-features li {
    font-size: 11px;
  }

  /* PARTNERS / SPONSORS
     (.partners-note had no responsive rule at any breakpoint) */
  .partners-note {
    font-size: 22px;
    margin-bottom: 8px;
  }

  /* FOOTER */
  footer {
    padding: 24px 14px 36px;
    gap: 18px;
  }

  .footer-brand {
    font-size: 18px;
  }

  .footer-contact-item {
    font-size: 9.5px;
  }

  .footer-cta {
    font-size: 7px;
    letter-spacing: 0.3em;
    padding: 9px 18px;
  }
}