/* ==================== TYPOGRAPHY ==================== */
  .display { font-family: 'Poppins', sans-serif; font-weight: 700; letter-spacing: -0.025em; }
  .mono { font-family: 'Poppins', sans-serif; font-weight: 600; letter-spacing: 0.04em; }
  .label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.14em; color: var(--copper); }
  .caption { font-size: 12px; color: var(--ink-mute); line-height: 1.5; }

  /* ==================== LAYOUT ==================== */
  .shell { max-width: 1280px; margin: 0 auto; padding: 32px 40px 80px; }
  @media (max-width: 720px) { .shell { padding: 20px 20px 60px; } }

  /* ==================== HEADER ==================== */
  .topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--line-soft);
    margin-bottom: 48px;
    gap: 32px;
  }
  @media (max-width: 900px) {
    .topbar { flex-wrap: wrap; gap: 16px; }
  }
  .brand {
    display: flex;
    align-items: baseline;
    gap: 14px;
    flex-shrink: 0;
  }

  .topnav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
  }
  @media (max-width: 900px) {
    .topnav { width: 100%; order: 3; justify-content: flex-start; flex-wrap: wrap; }
  }
  .topnav-link {
    background: transparent;
    border: none;
    font-family: 'Poppins', sans-serif;
    font-size: 13px;
    font-weight: 500;
    color: var(--ink-mute);
    padding: 8px 16px;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.15s ease;
    letter-spacing: 0.01em;
  }
  .topnav-link:hover {
    background: var(--copper-soft);
    color: var(--copper-deep);
  }
  .topnav-link.active {
    background: var(--ink);
    color: var(--paper);
    font-weight: 600;
  }

  .mobile-menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line-soft);
    border-radius: 9999px;
    background: var(--paper);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
  }
  .mobile-menu-toggle span {
    width: 18px;
    height: 2px;
    background: var(--ink);
    border-radius: 9999px;
    transition: transform 0.18s ease, opacity 0.18s ease;
  }
  .topbar.nav-open .mobile-menu-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .topbar.nav-open .mobile-menu-toggle span:nth-child(2) { opacity: 0; }
  .topbar.nav-open .mobile-menu-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  @media (max-width: 900px) {
    html, body { overflow-x: hidden; width: 100%; }
    .shell { max-width: 100%; overflow-x: hidden; }
    .topbar {
      position: relative;
      align-items: center;
      gap: 12px;
      margin-bottom: 32px;
    }
    .brand { flex: 1; min-width: 0; }
    .brand-mark { font-size: clamp(22px, 6vw, 26px); }
    .brand-sub { font-size: 9px; letter-spacing: 0.12em; }
    .mobile-menu-toggle { display: inline-flex; }
    .topnav {
      display: none;
      position: absolute;
      top: calc(100% + 12px);
      left: 0;
      right: 0;
      z-index: 500;
      width: 100%;
      order: 0;
      flex-direction: column;
      align-items: stretch;
      gap: 6px;
      padding: 12px;
      background: rgba(255, 255, 255, 0.98);
      border: 1px solid var(--line-soft);
      border-radius: 16px;
      box-shadow: var(--shadow-lg);
      backdrop-filter: blur(10px);
    }
    .topbar.nav-open .topnav { display: flex; }
    .topnav-link {
      width: 100%;
      text-align: left;
      padding: 12px 14px;
      font-size: 14px;
      border-radius: 12px;
    }
    .progress-meter { width: 100%; order: 4; justify-content: flex-start; }
    .intro-title, .hiw-title, .step-title, .results-title { font-size: clamp(32px, 10vw, 48px); }
    .intro-lede, .hiw-lede, .step-desc, .depth-sub, .hiw-section-sub { font-size: clamp(14px, 3.8vw, 16px); }
    .hiw-hero, .intro-top, .opp-hero-frame { padding: clamp(32px, 8vw, 48px) clamp(22px, 6vw, 36px); }
    .products-grid, .trades-grid, .states-grid, .markets-grid, .channels-grid { grid-template-columns: 1fr; }
    .journey-svg-wrap, .dfl-loop-wrap, .architecture-pyramid, .channels-hero-visual { max-width: 100%; overflow: hidden; }
    .depth-card, .depth-cta, .btn, .topnav-link, .mobile-menu-toggle { touch-action: manipulation; }
    .hiw-stat-card { overflow: visible; padding-left: 12px; padding-right: 12px; }
    .hiw-stat-card-num { font-size: clamp(26px, 8vw, 34px); line-height: 1.15; overflow: visible; }
    svg, img { max-width: 100%; height: auto; }
  }

  .progress-meter {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-mute);
    flex-shrink: 0;
  }
  .progress-track {
    width: 120px;
    height: 4px;
    background: var(--line-soft);
    border-radius: 2px;
    overflow: hidden;
  }
  .progress-fill {
    height: 100%;
    background: var(--copper);
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
  }
  .brand-mark {
    font-family: 'Poppins', sans-serif;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.03em;
    text-transform: lowercase;
    color: var(--ink);
  }
  .brand-mark::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--copper);
    margin-left: 3px;
    vertical-align: baseline;
  }
  .brand-sub {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--ink-mute);
    border-left: 1px solid var(--line-soft);
    padding-left: 14px;
  }

  /* ==================== SCREENS ==================== */
  .screen { display: none; animation: fadeUp 0.5s cubic-bezier(0.4, 0, 0.2, 1); }
  .screen.active { display: block; }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ==================== INTRO SCREEN ==================== */
  .intro-top {
    background: linear-gradient(135deg, var(--purple-deep) 0%, var(--purple-mid) 100%);
    border-radius: 16px;
    padding: 64px 56px;
    margin: 0 auto 40px;
    color: var(--paper);
    position: relative;
    overflow: hidden;
    max-width: 1180px;
  }
  .intro-top::before {
    content: '';
    position: absolute;
    top: -10%; right: -5%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(147, 21, 246, 0.4) 0%, transparent 65%);
    pointer-events: none;
  }
  .intro-top::after {
    content: '';
    position: absolute;
    bottom: -20%; left: -10%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(0, 173, 169, 0.15) 0%, transparent 65%);
    pointer-events: none;
  }
  .intro-top > * { position: relative; z-index: 1; }
  @media (max-width: 720px) { .intro-top { padding: 40px 28px; } }

  .intro-eyebrow {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--mint);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
  }
  .intro-eyebrow::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--mint);
  }
  .intro-title {
    font-size: clamp(40px, 6vw, 72px);
    line-height: 1.05;
    margin-bottom: 28px;
    color: var(--paper);
    font-weight: 700;
    letter-spacing: -0.025em;
    max-width: 900px;
  }
  .intro-title em {
    font-style: normal;
    color: var(--mint);
    font-weight: 700;
  }
  .intro-lede {
    font-size: 17px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.85);
    max-width: 720px;
    margin-bottom: 32px;
    font-weight: 400;
  }

  .doctor-frame {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    border-left: 3px solid var(--mint);
    border-radius: 0 8px 8px 0;
    max-width: 760px;
  }
  .doctor-frame-icon {
    font-size: 22px;
    color: var(--mint);
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
  }
  .doctor-frame-text {
    font-size: 15px;
    line-height: 1.55;
    color: rgba(255, 255, 255, 0.9);
  }
  .doctor-frame-text strong {
    color: var(--paper);
    font-weight: 600;
  }

  .depth-section {
    max-width: 1180px;
    margin: 0 auto;
  }
  .depth-header {
    margin-bottom: 40px;
    text-align: center;
  }
  .depth-header .label {
    margin-bottom: 12px;
    color: var(--copper);
  }
  .depth-sub {
    font-size: 16px;
    color: var(--ink-soft);
    max-width: 580px;
    margin: 0 auto;
    line-height: 1.5;
  }

  .depth-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 40px;
  }
  @media (max-width: 900px) {
    .depth-grid { grid-template-columns: 1fr; }
  }

  .depth-card {
    position: relative;
    background: var(--paper);
    border: 1.5px solid var(--line-soft);
    border-radius: 16px;
    padding: 28px 26px 24px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
  }
  .depth-card:hover {
    transform: translateY(-3px);
    border-color: var(--copper);
    box-shadow: var(--shadow-lg);
  }
  .depth-card.depth-recommended {
    border: 2px solid var(--copper);
    box-shadow: 0 0 0 1px var(--copper), var(--shadow-md);
  }
  .depth-card.depth-recommended:hover {
    box-shadow: 0 0 0 1px var(--copper), var(--shadow-lg);
  }
  .depth-recommended-tag {
    position: absolute;
    top: -12px;
    left: 24px;
    background: var(--copper);
    color: var(--paper);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    padding: 5px 12px;
    border-radius: 9999px;
  }

  .depth-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
  }
  .depth-time {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 32px;
    line-height: 1;
    color: var(--ink);
    
  }
  .depth-badge {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--ink-mute);
    padding: 4px 10px;
    border: 1px solid var(--line-soft);
    border-radius: 12px;
  }

  .depth-confidence {
    margin-bottom: 20px;
  }
  .depth-conf-num {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 64px;
    line-height: 0.9;
    color: var(--copper);
    
    margin-bottom: 4px;
  }
  .depth-conf-pct {
    font-style: normal;
    font-size: 22px;
    color: var(--ink-mute);
    margin-left: 2px;
  }
  .depth-conf-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-mute);
    font-weight: 500;
  }

  .depth-divider {
    height: 1px;
    background: var(--line-soft);
    margin-bottom: 18px;
  }

  .depth-detail { margin-bottom: 16px; }
  .depth-stat {
    font-size: 13px;
    color: var(--ink-mute);
    margin-bottom: 8px;
  }
  .depth-stat-num {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 22px;
    color: var(--ink);
    
    margin-right: 4px;
  }
  .depth-desc {
    font-size: 13px;
    line-height: 1.5;
    color: var(--ink-soft);
  }

  .depth-bullets {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
  }
  .depth-bullet {
    font-size: 12px;
    color: var(--ink-soft);
    padding-left: 16px;
    position: relative;
    line-height: 1.4;
  }
  .depth-bullet::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 8px;
    height: 1px;
    background: var(--copper);
  }

  .depth-cta {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: 1px solid var(--ink);
    color: var(--ink);
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.18s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }
  .depth-card.depth-recommended .depth-cta {
    background: var(--ink);
    color: var(--paper);
  }
  .depth-card:hover .depth-cta {
    background: var(--copper);
    border-color: var(--copper);
    color: var(--paper);
  }
  .depth-cta .arrow {
    transition: transform 0.18s ease;
  }
  .depth-card:hover .depth-cta .arrow {
    transform: translateX(3px);
  }

  .depth-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 28px;
    border-top: 1px solid var(--line-soft);
    gap: 24px;
    flex-wrap: wrap;
  }
  .depth-footer-stats {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
  }
  .meta-item .label { margin-bottom: 6px; }
  .meta-item .value {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 22px;
    line-height: 1.1;
  }

  /* ==================== BUTTONS ==================== */
  .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.01em;
    border-radius: 9999px;
    border: 1.5px solid var(--copper);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    background: transparent;
    color: var(--copper);
    font-family: inherit;
  }
  .btn-primary {
    background: var(--copper);
    color: var(--paper);
    border-color: var(--copper);
  }
  .btn-primary:hover {
    background: var(--copper-deep);
    border-color: var(--copper-deep);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(147, 21, 246, 0.3);
  }
  .btn-secondary {
    background: transparent;
    color: var(--copper);
    border-color: var(--copper);
  }
  .btn-secondary:hover {
    background: var(--copper);
    color: var(--paper);
  }
  .btn-mint {
    background: var(--mint);
    color: var(--ink);
    border-color: var(--mint);
  }
  .btn-mint:hover {
    background: var(--mint-deep);
    border-color: var(--mint-deep);
  }
  .btn-ghost {
    border: none;
    padding: 10px 0;
    color: var(--ink-mute);
    background: transparent;
  }
  .btn-ghost:hover {
    color: var(--copper);
    background: transparent;
  }
  .btn .arrow {
    transition: transform 0.2s ease;
  }
  .btn:hover .arrow {
    transform: translateX(3px);
  }