/* ── Tokens (matches site-wide palette) ── */
:root {
    --blush:      #F9C6D0;
    --blush-deep: #F0A3B5;
    --sage:       #A8C5A0;
    --sage-deep:  #3D6B4F;
    --cream:      #FEF6F8;
    --charcoal:   #3A2E35;
    --white:      #FFFFFF;
    --shadow:     0 4px 24px rgba(58,46,53,.10);
    --radius:     18px;
    --radius-sm:  10px;
  }
  
  .active-link { color: var(--sage-deep) !important; border-bottom: 2px solid var(--sage-deep); padding-bottom: 2px; }
  
  /* ── HERO ── */
  .learn-hero {
    background: linear-gradient(135deg, var(--cream) 50%, #f3e8f0 100%);
    text-align: center;
    padding: 5rem 2rem 3.5rem;
    position: relative;
    overflow: hidden;
  }
  .learn-hero::before {
    content: '';
    position: absolute; top: -50px; left: -50px;
    width: 220px; height: 220px;
    background: var(--blush); opacity: .2; border-radius: 50%;
  }
  .learn-hero::after {
    content: '';
    position: absolute; bottom: -50px; right: -30px;
    width: 200px; height: 200px;
    background: var(--sage); opacity: .18; border-radius: 50%;
  }
  .hero-eyebrow {
    display: inline-block;
    background: var(--blush); color: var(--sage-deep);
    font-weight: 700; font-size: .82rem; letter-spacing: .12em;
    text-transform: uppercase; padding: .35rem 1rem;
    border-radius: 50px; margin-bottom: 1.2rem;
    position: relative; z-index: 1;
  }
  .learn-hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700; color: var(--charcoal);
    margin: .5rem 0 1rem;
    position: relative; z-index: 1;
  }
  .learn-hero h1 em { color: var(--sage-deep); font-style: normal; }
  .learn-hero p {
    color: #5a4f55; font-size: 1.05rem;
    max-width: 540px; margin: 0 auto;
    position: relative; z-index: 1;
  }
  
  /* ── SHARED SECTION LABELS ── */
  .section-center { text-align: center; margin-bottom: 2.5rem; }
  .section-label {
    display: inline-block; font-size: .78rem; font-weight: 700;
    letter-spacing: .14em; text-transform: uppercase; color: var(--sage-deep);
    background: rgba(168,197,160,.18); padding: .3rem .9rem;
    border-radius: 50px; margin-bottom: .75rem;
  }
  .section-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700; margin-bottom: .8rem;
  }
  .section-sub { color: #5a4f55; font-size: 1.05rem; max-width: 560px; margin: 0 auto; }
  
  /* ── ALPHABET SECTION ── */
  .alphabet-section { padding: 4.5rem 2rem 3rem; background: var(--white); }
  .alphabet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 1rem;
    max-width: 920px;
    margin: 0 auto;
  }
  .letter-card {
    position: relative;
    background: var(--cream);
    border: 2px solid var(--blush);
    border-radius: var(--radius-sm);
    padding: 1.1rem .5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color .2s, transform .2s, box-shadow .2s;
  }
  .letter-card:hover {
    border-color: var(--sage-deep);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    z-index: 5;
  }
  .asl-emoji { font-size: 1.8rem; }
  .letter-label {
    display: block; font-weight: 700; font-size: 1rem;
    margin-top: .35rem; color: var(--sage-deep);
  }
  
  /* Tooltip shown on hover */
  .letter-tooltip {
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    width: 220px;
    background: var(--charcoal);
    color: var(--white);
    border-radius: var(--radius-sm);
    padding: .9rem 1rem;
    text-align: left;
    font-size: .82rem;
    line-height: 1.5;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, transform .2s;
    pointer-events: none;
    box-shadow: 0 10px 30px rgba(0,0,0,.25);
  }
  .letter-tooltip strong {
    display: block;
    color: var(--blush);
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    margin-bottom: .3rem;
  }
  .letter-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 7px solid transparent;
    border-top-color: var(--charcoal);
  }
  .letter-card:hover .letter-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  
  /* ── LESSONS SECTION ── */
  .lessons-section {
    padding: 4.5rem 2rem 5.5rem;
    background: linear-gradient(135deg, #f0dde6 0%, #ddf0e5 100%);
  }
  
  .level-tabs {
    display: flex;
    justify-content: center;
    gap: .8rem;
    flex-wrap: wrap;
    margin-bottom: 2.8rem;
  }
  .level-tab {
    background: var(--white);
    border: 2px solid var(--blush);
    color: var(--charcoal);
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    font-size: .95rem;
    padding: .65rem 1.6rem;
    border-radius: 50px;
    cursor: pointer;
    transition: background .2s, border-color .2s, transform .2s, color .2s;
  }
  .level-tab:hover {
    transform: translateY(-2px);
    border-color: var(--sage);
  }
  .level-tab.active {
    background: var(--sage-deep);
    border-color: var(--sage-deep);
    color: var(--white);
  }
  
  .level-panel { display: none; max-width: 980px; margin: 0 auto; }
  .level-panel.active { display: block; animation: fadeIn .4s ease; }
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  
  .level-intro {
    text-align: center;
    margin-bottom: 2.2rem;
  }
  .level-intro h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem; font-weight: 700;
    color: var(--charcoal); margin-bottom: .6rem;
  }
  .level-intro p {
    color: #5a4f55; font-size: 1rem;
    max-width: 600px; margin: 0 auto;
  }
  
  .lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.4rem;
  }
  .lesson-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 1.6rem 1.6rem 1.5rem;
    border-top: 5px solid var(--blush);
    box-shadow: var(--shadow);
    transition: transform .2s, box-shadow .2s;
  }
  .lesson-card:nth-child(2) { border-top-color: var(--sage); }
  .lesson-card:nth-child(3) { border-top-color: var(--blush-deep); }
  .lesson-card:nth-child(4) { border-top-color: var(--sage-deep); }
  .lesson-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(58,46,53,.13);
  }
  .lesson-num {
    display: inline-block;
    font-size: .72rem; font-weight: 700;
    letter-spacing: .1em; text-transform: uppercase;
    color: var(--sage-deep);
    background: rgba(168,197,160,.18);
    padding: .25rem .7rem;
    border-radius: 50px;
    margin-bottom: .7rem;
  }
  .lesson-card h4 {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem; font-weight: 700;
    color: var(--charcoal); margin-bottom: .5rem;
  }
  .lesson-signs {
    font-size: .82rem;
    font-weight: 700;
    color: var(--blush-deep);
    letter-spacing: .02em;
    margin-bottom: .7rem;
    line-height: 1.6;
  }
  .lesson-tip {
    font-size: .87rem;
    color: #5a4f55;
    line-height: 1.6;
    margin-bottom: 1rem;
  }
  .lesson-tip strong { color: var(--charcoal); }
  .practice-box {
    background: var(--cream);
    border: 1.5px dashed var(--blush);
    border-radius: var(--radius-sm);
    padding: .8rem 1rem;
    font-size: .85rem;
    color: var(--charcoal);
    line-height: 1.5;
  }
  .practice-label {
    font-weight: 700;
    color: var(--sage-deep);
  }
  
  /* ── FOOTER (shared) ── */
  footer {
    background: var(--charcoal);
    color: rgba(255,255,255,.75);
    padding: 3rem 6rem;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
  }
  .footer-brand p { font-size: .9rem; margin-top: .6rem; line-height: 1.6; }
  footer h4 { font-weight: 700; color: var(--white); margin-bottom: .8rem; font-size: .95rem; }
  footer ul { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
  footer ul a { color: rgba(255,255,255,.7); text-decoration: none; font-size: .9rem; transition: color .2s; }
  footer ul a:hover { color: var(--blush); }
  .footer-bottom {
    background: #2a2028; text-align: center; padding: 1rem;
    font-size: .82rem; color: rgba(255,255,255,.45);
  }
  .footer-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem; font-weight: 700; color: var(--white);
  }
  .footer-logo span { color: var(--blush); }
  
  /* ── RESPONSIVE ── */
  @media (max-width: 700px) {
    .lesson-grid { grid-template-columns: 1fr; }
    footer { grid-template-columns: 1fr; padding: 2.5rem 1.5rem; gap: 2rem; }
    .letter-tooltip { width: 180px; font-size: .78rem; }
  }
  @media (max-width: 600px) {
    .nav-links { display: none; }
    .level-tabs { gap: .5rem; }
    .level-tab { padding: .55rem 1.2rem; font-size: .85rem; }
  }