:root {
    --teal-dark: #1a6b6b;
    --teal-mid: #2a9090;
    --teal-light: #7ec8c8;
    --teal-pale: #f0f9f9;
    --gold: #c9a96e;
    --text-dark: #1a3333;
    --text-mid: #3d6060;
    --text-light: #6a9a9a;
    --white: #ffffff;
    --bg: #ffffff;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }

  html { scroll-behavior: smooth; }

  body {
    font-family: 'Jost', sans-serif;
    background: #ffffff;
    color: var(--text-dark);
    overflow-x: hidden;
  }


  .logo-mark svg { display: block; }
  .logo-text-block { display: flex; flex-direction: column; }
  .logo-acronym {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--teal-dark);
    line-height: 1;
    letter-spacing: 0.05em;
  }
  .logo-full {
    font-family: 'Cormorant Garamond', serif;
    font-size: 0.72rem;
    font-weight: 400;
    font-style: italic;
    color: var(--text-mid);
    letter-spacing: 0.03em;
    line-height: 1.3;
    max-width: 200px;
  }


  .hero-logos {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 40px;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(4px);
    border-top: 1px solid rgba(255,255,255,0.2);
  }
  .hero-logo-athta {
    height: 52px;
    width: auto;
    object-fit: contain;
    filter: brightness(0) invert(1) opacity(0.85);
  }
  .hero-logo-cptyc {
    height: 52px;
    width: auto;
  }

  /* ── NAV ── */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(42,144,144,0.12);
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    transition: box-shadow .3s;
  }
  nav.scrolled { box-shadow: 0 4px 24px rgba(26,107,107,0.10); }

  .nav-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
  }
  .nav-logo img {
    height: 52px;
    width: auto;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
  }
  .nav-links a {
    text-decoration: none;
    font-family: 'Jost', sans-serif;
    font-weight: 400;
    font-size: 0.88rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-mid);
    transition: color .25s;
    position: relative;
  }
  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 1.5px;
    background: var(--teal-mid);
    transition: width .3s;
  }
  .nav-links a:hover { color: var(--teal-dark); }
  .nav-links a:hover::after { width: 100%; }

  /* Dropdown */
  .dropdown { position: relative; }
  .dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border: 1px solid rgba(42,144,144,0.15);
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(26,107,107,0.12);
    min-width: 220px;
    padding: 8px 0;
    z-index: 200;
  }
  .dropdown:hover .dropdown-menu { display: block; }
  .dropdown-menu a {
    display: block;
    padding: 10px 20px;
    font-size: 0.82rem;
    color: var(--text-mid);
    text-transform: none;
    letter-spacing: 0.03em;
    white-space: nowrap;
  }
  .dropdown-menu a::after { display: none; }
  .dropdown-menu a:hover { background: var(--teal-pale); color: var(--teal-dark); }
  .dropdown-label { cursor: default; }
  .dropdown-label::after { content: ' ▾'; font-size: 0.7em; }

  /* ── HERO ── */
  .hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden;
  }
  .hero-bg {
    position: absolute;
    inset: 0;
    background:
      linear-gradient(160deg, rgba(255,255,255,0.08) 0%, rgba(200,200,200,0.12) 100%),
      url('../images/bg-a9789acfb6da.jpg') center bottom/cover no-repeat;
  }
  .hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 60%, rgba(42,144,144,0.10) 100%);
  }
  .hero-content {
    position: relative;
    z-index: 2;
    text-align: left;
    color: white;
    padding: 0 60px;
    max-width: 480px;
    animation: fadeUp 1.2s ease both;
  }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  .hero-eyebrow {
    font-family: 'Jost', sans-serif;
    font-weight: 300;
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: #0d4a4a;
    margin-bottom: 12px;
  }
  .hero h1 {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 600;
    font-size: clamp(1.6rem, 3.5vw, 3rem);
    line-height: 1.1;
    margin-bottom: 8px;
    color: #0d4a4a;
  }
  .hero h1 em {
    color: var(--teal-dark);
    font-style: italic;
    color: var(--teal-light);
  }
  .hero-subtitle {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: clamp(0.95rem, 1.6vw, 1.2rem);
    color: var(--teal-mid);
    margin-bottom: 40px;
    font-weight: 300;
  }
  .hero-badges {
    display: flex;
    gap: 12px;
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-bottom: 44px;
  }
  .badge {
    border: 1px solid #0d4a4a;
    border-radius: 100px;
    padding: 7px 18px;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: #0d4a4a;
    font-weight: 500;
  }
  .hero-cta {
    display: inline-block;
    background: var(--teal-mid);
    color: white;
    text-decoration: none;
    padding: 14px 40px;
    border-radius: 100px;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
    transition: background .3s, transform .3s;
  }
  .hero-cta:hover { background: var(--teal-dark); transform: translateY(-2px); }

  .hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--teal-mid);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: bounce 2s infinite;
  }
  .hero-scroll span { font-size: 1.2rem; }
  @keyframes bounce {
    0%,100% { transform: translateX(-50%) translateY(0); }
    50%      { transform: translateX(-50%) translateY(6px); }
  }

  /* ── SECTIONS ── */
  section { padding: 90px 40px; }
  .section-label {
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--teal-mid);
    font-weight: 500;
    margin-bottom: 12px;
    display: block;
  }
  .section-title {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 400;
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--teal-dark);
    margin-bottom: 16px;
  }
  .section-desc {
    font-weight: 300;
    font-size: 1rem;
    color: var(--text-mid);
    max-width: 560px;
    line-height: 1.8;
    margin-bottom: 60px;
  }
  .centered { text-align: center; }
  .centered .section-desc { margin-left: auto; margin-right: auto; }

  /* ── CURSOS GRID ── */
  .cursos-section { background: white; }
  .cursos-section + .cursos-section { background: #ffffff; }

  .tab-nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 56px;
    flex-wrap: wrap;
  }
  .tab-btn {
    border: 1.5px solid var(--teal-mid);
    background: transparent;
    color: var(--teal-mid);
    padding: 10px 26px;
    border-radius: 100px;
    font-family: 'Jost', sans-serif;
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all .25s;
  }
  .tab-btn:hover, .tab-btn.active {
    background: var(--teal-mid);
    color: white;
  }

  .cursos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
  }

  .curso-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 16px rgba(26,107,107,0.07);
    transition: transform .3s, box-shadow .3s;
    display: flex;
    flex-direction: column;
  }
  .curso-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(26,107,107,0.14);
  }
  .curso-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
  }
  .curso-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
  }
  .curso-tag {
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--teal-mid);
    font-weight: 500;
    margin-bottom: 8px;
  }
  .curso-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--teal-dark);
    margin-bottom: 12px;
    line-height: 1.3;
  }
  .curso-desc {
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--text-mid);
    font-weight: 300;
    flex: 1;
  }
  .curso-btn {
    display: block;
    margin-top: 20px;
    border: 1.5px solid var(--teal-mid);
    color: var(--teal-mid);
    text-align: center;
    padding: 10px;
    border-radius: 8px;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    font-weight: 500;
    transition: all .25s;
  }
  .curso-btn:hover {
    background: var(--teal-mid);
    color: white;
  }

  /* hidden tab content */
  .tab-content { display: none; }
  .tab-content.active { display: block; }

  /* ── NOSOTROS ── */
  #nosotros {
    background: linear-gradient(135deg, var(--teal-dark) 0%, #0d4a4a 100%);
    color: white;
  }
  #nosotros .section-label { color: var(--teal-light); }
  #nosotros .section-title { color: white; }
  .nosotros-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
  }
  .nosotros-text p {
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.85;
    color: rgba(255,255,255,0.8);
    margin-bottom: 20px;
  }
  .directora-bloque {
    margin-top: 36px;
    padding: 24px 28px;
    background: rgba(255,255,255,0.07);
    border-left: 3px solid var(--teal-light);
    border-radius: 0 12px 12px 0;
  }
  .directora-nombre {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    margin-bottom: 6px;
    letter-spacing: 0.02em;
  }
  .directora-titulo {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--teal-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 14px;
  }
  .directora-bio {
    font-size: 0.95rem;
    font-weight: 300;
    line-height: 1.8;
    color: rgba(255,255,255,0.8);
    margin: 0;
  }
  .nosotros-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .value-item {
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(126,200,200,0.2);
    border-radius: 12px;
    padding: 24px 20px;
  }
  .value-icon { font-size: 1.8rem; margin-bottom: 10px; }
  .value-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--teal-light);
    margin-bottom: 6px;
  }
  .value-desc {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.6;
    font-weight: 300;
  }

  /* ── TESTIMONIOS ── */
  #testimonios { background: #ffffff; }
  .testimonios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
    max-width: 1100px;
    margin: 0 auto;
  }
  .testimonio-card {
    background: white;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 2px 16px rgba(26,107,107,0.06);
    position: relative;
  }
  .testimonio-card::before {
    content: '"';
    font-family: 'Cormorant Garamond', serif;
    font-size: 5rem;
    color: var(--teal-light);
    position: absolute;
    top: 10px; left: 24px;
    line-height: 1;
    opacity: 0.4;
  }
  .testimonio-text {
    font-size: 0.92rem;
    line-height: 1.8;
    color: var(--text-mid);
    font-weight: 300;
    font-style: italic;
    margin-bottom: 20px;
    padding-top: 24px;
  }
  .testimonio-autor {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--teal-dark);
    letter-spacing: 0.05em;
  }
  .testimonio-curso {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 300;
  }

  /* ── CONTACTO ── */
  #contacto { background: white; }
  .contacto-inner {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
  }
  .contacto-info p {
    font-size: 0.92rem;
    color: var(--text-mid);
    line-height: 1.8;
    font-weight: 300;
    margin-bottom: 28px;
  }
  .contacto-item {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
  }
  .contacto-icon {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--teal-pale);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
  }
  .contacto-label {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-light);
    font-weight: 500;
  }
  .contacto-value {
    font-size: 0.9rem;
    color: var(--teal-dark);
    font-weight: 400;
  }
  .contacto-form { display: flex; flex-direction: column; gap: 16px; }
  .form-group { display: flex; flex-direction: column; gap: 6px; }
  .form-group label {
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-mid);
    font-weight: 500;
  }
  .form-group input,
  .form-group textarea,
  .form-group select {
    border: 1.5px solid rgba(42,144,144,0.2);
    border-radius: 8px;
    padding: 12px 14px;
    font-family: 'Jost', sans-serif;
    font-size: 0.9rem;
    color: var(--text-dark);
    background: #ffffff;
    transition: border-color .25s;
    outline: none;
  }
  .form-group input:focus,
  .form-group textarea:focus,
  .form-group select:focus {
    border-color: var(--teal-mid);
  }
  .form-group textarea { resize: vertical; min-height: 100px; }
  .form-submit {
    background: var(--teal-mid);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 14px;
    font-family: 'Jost', sans-serif;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
    cursor: pointer;
    transition: background .25s;
  }
  .form-submit:hover { background: var(--teal-dark); }

  /* ── FOOTER ── */
  footer {
    background: var(--text-dark);
    padding: 40px;
  }
  .footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1100px;
    margin: 0 auto;
    gap: 40px;
  }
  .footer-logo-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    min-width: 130px;
  }
  .footer-logo-right {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 130px;
  }
  .footer-logo-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .footer-acronym {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--teal-light);
    letter-spacing: 0.05em;
    line-height: 1;
  }
  .footer-name {
    font-family: 'Cormorant Garamond', serif;
    font-size: 0.75rem;
    font-style: italic;
    color: rgba(255,255,255,0.5);
    line-height: 1.4;
    margin-top: 4px;
  }
  .footer-center {
    text-align: center;
    flex: 1;
  }
  .footer-reconocido {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.75);
    line-height: 1.6;
    margin-bottom: 10px;
  }
  .footer-desc {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
    margin-bottom: 16px;
    font-weight: 300;
  }
  .footer-social {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
  }
  .social-btn {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: rgba(42,144,144,0.3);
    border: 1px solid rgba(42,144,144,0.4);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.9rem;
    text-decoration: none;
    transition: background .2s;
  }
  .social-btn:hover { background: rgba(42,144,144,0.6); }
  .footer-divider { border: none; border-top: 1px solid rgba(255,255,255,0.1); margin: 16px auto; max-width: 300px; }
  .footer-copy { font-size: 0.7rem; color: rgba(255,255,255,0.3); font-weight: 300; }

/* ── RESPONSIVE ── */
  @media (max-width: 768px) {
    nav { padding: 0 20px; }
    .nav-links { display: none; }
    section { padding: 60px 20px; }
    .nosotros-inner { grid-template-columns: 1fr; gap: 40px; }
    .contacto-inner { grid-template-columns: 1fr; gap: 40px; }
    .nosotros-values { grid-template-columns: 1fr; }
  }

  .libros-grid {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 28px;
    max-width: 1200px;
    margin: 0 auto;
  }
  .libro-card {
    background: white;
    border: 1px solid rgba(42,144,144,0.15);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 16px rgba(26,107,107,0.07);
    transition: transform .3s, box-shadow .3s;
    display: flex;
    flex-direction: column;
  }
  .libro-card:hover { transform: translateY(-6px); }
  .libro-img-placeholder { width:100%; height:340px; background:linear-gradient(135deg,#f0f9f9 0%,#d4eeee 100%); display:flex; align-items:center; justify-content:center; font-size:4rem; }
  .libro-img { width:100%; height:340px; object-fit:contain; background:#f8f8f8; display:block; }
  .libro-body { padding:20px; flex:1; display:flex; flex-direction:column; }
  .libro-titulo { font-family:'Cormorant Garamond',serif; font-size:1.2rem; font-weight:600; color:#1a6b6b; margin-bottom:10px; line-height:1.3; }
  .libro-resena { font-size:0.85rem; line-height:1.7; color:#3d6060; font-weight:300; flex:1; margin-bottom:14px; }
  .libro-precio { display:flex; flex-direction:column; gap:4px; margin-bottom:14px; }
  .precio-arg { font-size:0.85rem; font-weight:500; color:#1a6b6b; }
  .precio-ext { font-size:0.85rem; font-weight:400; color:#6a9a9a; }
  .libro-btn { display:block; background:#25D366; color:white; text-align:center; padding:10px; border-radius:8px; font-size:0.82rem; text-decoration:none; font-weight:500; }
  .libro-btn:hover { background:#1ebe5d; }
  @media(max-width:900px) { .libros-grid { grid-template-columns:repeat(2,1fr) !important; } }
  @media(max-width:600px) { .libros-grid { grid-template-columns:1fr !important; } }

  .btn-login {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: var(--teal-mid, #2a9090);
    color: white !important;
    border-radius: 100px;
    padding: 9px 22px;
    font-family: 'Jost', sans-serif;
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    transition: background 0.25s, transform 0.2s;
    box-shadow: 0 3px 12px rgba(42,144,144,0.25);
  }
  .btn-login:hover {
    background: #1a6b6b;
    transform: translateY(-1px);
    box-shadow: 0 5px 18px rgba(42,144,144,0.35);
  }

  .whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    background: #25D366;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(37,211,102,0.45);
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
  }
  .whatsapp-float:hover {
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 10px 28px rgba(37,211,102,0.55);
  }
  .whatsapp-float svg {
    width: 34px;
    height: 34px;
    fill: white;
  }
  .whatsapp-tooltip {
    position: fixed;
    bottom: 38px;
    right: 98px;
    z-index: 998;
    background: #1a3333;
    color: white;
    font-family: 'Jost', sans-serif;
    font-size: 0.78rem;
    font-weight: 400;
    padding: 8px 14px;
    border-radius: 8px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
  }
  .whatsapp-float:hover + .whatsapp-tooltip,
  .whatsapp-tooltip:hover {
    opacity: 1;
  }

  .frase-banner {
    background: linear-gradient(135deg, #1a6b6b 0%, #2a9090 100%);
    padding: 48px 40px;
    text-align: center;
  }
  .frase-banner p {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 400;
    font-style: italic;
    color: white;
    letter-spacing: 0.03em;
    line-height: 1.5;
    margin: 0;
    opacity: 0.95;
  }
  .frase-banner span {
    display: inline-block;
    width: 40px;
    height: 1px;
    background: rgba(255,255,255,0.4);
    margin: 0 12px;
    vertical-align: middle;
  }

  .ver-mas-btn {
    display: block;
    width: fit-content;
    margin: 40px auto 0;
    background: transparent;
    color: var(--teal-dark);
    border: 2px solid var(--teal-dark);
    padding: 13px 36px;
    border-radius: 30px;
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    transition: all 0.2s;
  }
  .ver-mas-btn:hover {
    background: var(--teal-dark);
    color: white;
  }



    .back-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--teal-dark);
      color: white;
      padding: 12px 28px;
      border-radius: 30px;
      text-decoration: none;
      font-family: 'Montserrat', sans-serif;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 48px;
      transition: background 0.2s;
    }
    .back-btn:hover { background: var(--teal-medium); }