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

  body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: #ffffff;
    color: #1a1a2e;
    overflow-x: hidden;
  }

  header {
    padding: 16px 40px;
    border-bottom: 1px solid rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    gap: 32px;
  }

  header h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.5px; color: #111; white-space: nowrap; }
  header p { font-size: 14px; color: #888; margin-top: 4px; }
  .header-left { flex-shrink: 0; }
  .header-stats { display: flex; gap: 28px; align-items: center; margin-left: auto; }
  .header-stats .stat-value { color: #111; font-weight: 600; font-size: 16px; display: block; }
  .header-stats .stat-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.3px; color: #888; margin-top: 1px; }

  .controls {
    padding: 16px 40px;
    display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
    border-bottom: 1px solid rgba(0,0,0,0.06);
  }

  .controls label { font-size: 12px; color: #888; text-transform: uppercase; letter-spacing: 0.5px; }

  .controls select { background: #f8f9fa; border: 1px solid #d0d0d0; color: #555; padding: 6px 10px; border-radius: 6px; font-size: 13px; outline: none; }

  .view-tabs { display: flex; gap: 4px; background: #f0f0f0; border-radius: 8px; padding: 2px; }
  .view-tab { padding: 6px 14px; border-radius: 6px; font-size: 13px; cursor: pointer; color: #888; transition: all 0.15s; border: none; background: none; }
  .view-tab.active { background: #ffffff; color: #111; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
  .view-tab:hover { color: #555; }

  #alluvial-container { width: 100%; padding: 20px 20px 20px 40px; overflow-x: hidden; }

  #cards-container {
    padding: 20px 40px;
    display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); gap: 16px;
  }

  .founder-card {
    background: #ffffff; border: 1px solid #e0e0e0; border-radius: 12px; padding: 20px;
    cursor: pointer; transition: all 0.2s;
  }
  .founder-card:hover { border-color: #b0b0c0; transform: translateY(-2px); box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
  .founder-card .name { font-size: 16px; font-weight: 600; color: #111; margin-bottom: 8px; }

  .switch-badge {
    display: inline-flex; align-items: center; gap: 4px; font-size: 11px; padding: 3px 8px;
    border-radius: 8px; background: rgba(85,102,255,0.08); color: #5566dd; margin: 2px 4px 2px 0;
  }
  .switch-badge .arrow { color: #aaa; }

  .timeline-row { display: flex; gap: 4px; margin-top: 8px; flex-wrap: wrap; }

  .role-chip {
    display: flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 6px;
    font-size: 12px; color: #555; border: 1px solid rgba(0,0,0,0.08); white-space: nowrap;
  }
  .role-chip .dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
  .role-chip .years { color: #aaa; font-size: 10px; }

  .tooltip {
    position: fixed; background: #ffffff; border: 1px solid #e0e0e0; border-radius: 8px;
    padding: 10px 14px; font-size: 11px; pointer-events: none; z-index: 1000;
    max-width: 360px; box-shadow: 0 8px 32px rgba(0,0,0,0.12); display: none; line-height: 1.5;
  }
  .tooltip .tt-name { font-weight: 700; color: #111; font-size: 13px; margin-bottom: 4px; }
  .tooltip .tt-detail { color: #555; font-size: 10px; }
  .tooltip .tt-role { display: flex; align-items: center; gap: 6px; margin: 2px 0; }
  .tooltip .tt-role-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
  .tooltip .tt-role-company { color: #111; font-weight: 500; }
  .tooltip .tt-role-title { color: #888; font-size: 10px; }
  .tooltip .tt-role-years { color: #aaa; font-size: 9px; margin-left: auto; }
  .tooltip .tt-switch-label {
    display: inline-block; background: rgba(251,191,36,0.12); color: #d97706;
    padding: 1px 6px; border-radius: 4px; font-size: 9px; font-weight: 600;
    margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px;
  }
  .tooltip .tt-sector-title {
    font-weight: 700; color: #111; font-size: 12px; margin-bottom: 6px;
  }
  .tooltip .tt-person-row {
    display: flex; align-items: center; gap: 6px; margin: 2px 0; color: #555; font-size: 10px;
  }
  .tooltip .tt-person-company { color: #888; font-size: 10px; }

  .stats-bar { display: none; }

  .sector-legend { display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 40px 12px; }
  .legend-item {
    display: flex; align-items: center; gap: 5px; font-size: 11px; color: #666;
    cursor: pointer; padding: 3px 8px; border-radius: 6px; transition: background 0.15s;
  }
  .legend-item:hover { background: rgba(0,0,0,0.04); }
  .legend-item.dimmed { opacity: 0.3; }
  .legend-dot { width: 8px; height: 8px; border-radius: 50%; }

  .alluvial-path {
    fill: none; stroke-opacity: 0.25; stroke-width: 2;
    transition: stroke-opacity 0.2s, stroke-width 0.2s; cursor: pointer;
  }
  .alluvial-path.sector-switch { stroke-opacity: 0.45; stroke-width: 2.5; }
  .alluvial-path:hover, .alluvial-path.highlight { stroke-opacity: 0.85; stroke-width: 3.5; }
  .alluvial-path.dimmed { stroke-opacity: 0.04; stroke-width: 1.5; }

  .sector-block { cursor: pointer; transition: opacity 0.15s; }
  .sector-block:hover { opacity: 0.2 !important; }

  .view-hidden { display: none !important; }
  .switch-highlight { background: rgba(255,170,0,0.04); border-color: rgba(255,170,0,0.25); }

  .add-person-wrap { position: relative; }
  #add-person {
    background: #f8f9fa; border: 1px solid #d0d0d0; color: #555; padding: 6px 10px;
    border-radius: 6px; font-size: 13px; outline: none; width: 180px;
  }
  #add-person:focus { border-color: #9090b0; }
  .add-suggestions {
    position: absolute; top: 100%; left: 0; width: 260px; background: #ffffff;
    border: 1px solid #e0e0e0; border-radius: 8px; max-height: 200px; overflow-y: auto;
    z-index: 100; display: none; box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  }
  .add-suggestions.show { display: block; }
  .add-suggestion {
    padding: 8px 12px; cursor: pointer; font-size: 12px; color: #555;
    display: flex; align-items: center; gap: 8px;
  }
  .add-suggestion:hover { background: rgba(0,0,0,0.04); }
  .add-suggestion .sg-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
  .add-suggestion .sg-name { color: #111; font-weight: 500; }
  .add-suggestion .sg-sub { color: #aaa; font-size: 10px; }

  .restore-btn {
    background: #f8f9fa; border: 1px solid #d0d0d0; color: #888; padding: 5px 10px;
    border-radius: 6px; font-size: 11px; cursor: pointer;
  }
  .restore-btn:hover { color: #444; border-color: #aaa; }

  .presets-bar {
    padding: 8px 40px 12px;
    display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
    border-bottom: 1px solid rgba(0,0,0,0.06);
  }
  .presets-label { font-size: 11px; color: #bbb; text-transform: uppercase; letter-spacing: 0.5px; margin-right: 4px; }
  .preset-btn {
    background: #f8f9fa; border: 1px solid #d0d0d0; color: #666; padding: 5px 14px;
    border-radius: 20px; font-size: 12px; cursor: pointer; transition: all 0.15s;
    white-space: nowrap;
  }
  .preset-btn:hover { background: #f0f0f0; border-color: #b0b0c0; color: #333; }
  .preset-btn.active { background: #eeeeff; border-color: #6366f1; color: #4448cc; }
  .preset-btn-all {
    background: transparent; border: 1px solid #d0d0d0; color: #888; padding: 5px 14px;
    border-radius: 20px; font-size: 12px; cursor: pointer; transition: all 0.15s;
  }
  .preset-btn-all:hover { border-color: #b0b0c0; color: #555; }
  .preset-btn-all.active { border-color: #6366f1; color: #4448cc; }

  .tt-remove-btn {
    display: inline-block; margin-top: 8px; padding: 4px 10px; font-size: 11px;
    background: rgba(239,68,68,0.15); color: #f87171; border: 1px solid rgba(239,68,68,0.3);
    border-radius: 5px; cursor: pointer; transition: all 0.15s;
  }
  .tt-remove-btn:hover { background: rgba(239,68,68,0.3); color: #fff; }

.welcome-overlay {
  position: fixed;
  inset: 0;
  background: rgba(240, 240, 248, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.welcome-overlay.visible { opacity: 1; pointer-events: auto; }
.welcome-overlay.hidden { pointer-events: none; opacity: 0; }

.welcome-card {
  background: #ffffff;
  border: 1px solid #e0e0e0;
  border-radius: 16px;
  padding: 48px 44px 40px;
  max-width: 480px;
  width: 90%;
  text-align: center;
  transform: translateY(12px);
  transition: transform 0.4s ease, opacity 0.4s ease;
  opacity: 0;
  box-shadow: 0 8px 40px rgba(0,0,0,0.12);
}
.welcome-overlay.visible .welcome-card {
  transform: translateY(0);
  opacity: 1;
}

.welcome-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #111;
  margin-bottom: 20px;
}

.welcome-body {
  font-size: 15px;
  line-height: 1.7;
  color: #555;
  margin-bottom: 32px;
}
.welcome-body em {
  color: #1a1a2e;
  font-style: italic;
}

.welcome-cta {
  background: #6366f1;
  border: 1px solid #6366f1;
  color: #fff;
  padding: 12px 32px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.welcome-cta:hover {
  background: #4f52d9;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

  /* Era stepper — hidden on desktop */
  .era-stepper {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    padding: 8px 12px;
  }
  .era-step-btn {
    background: #f8f9fa;
    border: 1px solid #d0d0d0;
    color: #666;
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
    flex-shrink: 0;
    white-space: nowrap;
  }
  .era-step-btn:hover { border-color: #b0b0c0; color: #333; background: #f0f0f0; }
  .era-step-btn:disabled { opacity: 0; pointer-events: none; }
  .era-step-btn .arrow { font-size: 14px; line-height: 1; }
  .era-step-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    flex: 1;
    min-width: 0;
  }
  .era-step-labels {
    display: flex;
    align-items: center;
    gap: 6px;
    text-align: center;
  }
  .era-step-label {
    font-size: 13px;
    font-weight: 600;
    color: #111;
    white-space: nowrap;
  }
  .era-step-sub {
    font-size: 10px;
    color: #aaa;
    display: block;
  }
  .era-step-arrow {
    color: #bbb;
    font-size: 16px;
  }
  .era-step-dots {
    display: flex;
    gap: 6px;
    justify-content: center;
    flex: 1;
    align-items: center;
  }
  .era-step-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #d0d0d0;
    transition: background 0.2s;
  }
  .era-step-dot.active { background: #6366f1; }

  /* Mobile tap hint — hidden on desktop, fades out after interaction */
  .mobile-tap-hint {
    display: none;
    text-align: center;
    color: #aaa;
    font-size: 12px;
    padding: 8px 0 4px;
    transition: opacity 0.5s;
  }
  .mobile-tap-hint.hidden { opacity: 0; pointer-events: none; }

  /* Mobile toast — lightweight name display */
  .mobile-toast {
    display: none;
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 8px 16px;
    color: #111;
    font-size: 13px;
    font-weight: 500;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    white-space: nowrap;
    max-width: calc(100vw - 32px);
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
  }
  .mobile-toast.show {
    display: block;
    opacity: 1;
  }
  .mobile-toast .toast-sector {
    font-size: 11px;
    font-weight: 400;
    opacity: 0.6;
    margin-left: 6px;
  }
  .mobile-toast .toast-switches {
    font-size: 10px;
    color: #fbbf24;
    margin-left: 8px;
  }

  /* Mobile controls toggle */
  .controls-toggle {
    display: none;
    background: #f8f9fa;
    border: 1px solid #d0d0d0;
    color: #555;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    width: calc(100% - 24px);
    margin: 8px 12px 0;
    text-align: left;
  }
  .controls-toggle:hover { border-color: #b0b0c0; }
  .controls-toggle .toggle-arrow { float: right; transition: transform 0.2s; }
  .controls-toggle.open .toggle-arrow { transform: rotate(180deg); }

  /* ===== MOBILE: STRIP TO ESSENTIALS ===== */
  @media (max-width: 768px) {
    /* Header: just the title, kill the subtitle and stats */
    header {
      padding: 10px 16px;
      flex-direction: row;
      align-items: center;
      gap: 0;
    }
    header h1 { font-size: 20px; }
    header p { display: none; }
    .header-stats { display: none !important; }

    /* Presets: wrapping chip grid — all visible at a glance */
    .presets-bar {
      padding: 8px 12px;
      gap: 6px;
      flex-wrap: wrap;
      border-bottom: none;
      overflow-x: visible;
    }
    .presets-label { display: none; }
    .preset-btn, .preset-btn-all {
      font-size: 12px;
      padding: 7px 12px;
      flex-shrink: 0;
      border-radius: 16px;
    }
    /* MYO button: show as a chip like the rest */
    .preset-btn[data-preset="__myo__"] { border-style: dashed; }
    /* MYO panel: full-width on mobile */
    #myo-panel { margin: 0 12px 12px !important; padding: 12px 14px !important; }
    #myo-panel > div:first-child { flex-wrap: wrap; gap: 8px; }
    #myo-share { width: 100%; margin-top: 4px; }

    /* Controls: hide everything except search behind toggle */
    .controls-toggle { display: block; }
    .controls {
      padding: 12px;
      gap: 8px;
      flex-direction: column;
      align-items: stretch;
    }
    .controls.collapsed { display: none !important; }
    /* Hide view tabs, filters, checkboxes — flow-only on mobile */
    .controls .view-tabs { display: none; }
    .controls label { display: none; }
    .controls input[type="checkbox"] { display: none; }
    .controls > div[style*="flex:1"] { display: none; }
    .controls .restore-btn { display: none; }
    /* Search is the only thing that shows */
    .add-person-wrap { width: 100%; }
    #add-person { width: 100%; font-size: 16px; padding: 10px 12px; border-radius: 10px; }
    .add-suggestions { width: 100%; left: 0; right: 0; }

    /* Kill sector legend on mobile — learn colors by tapping dots */
    .sector-legend { display: none; }

    /* Force flow view, hide cards */
    #cards-container { display: none !important; }

    /* Diagram: full bleed, horizontal scroll */
    #alluvial-container {
      padding: 8px 0 8px 8px;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    /* Show tap hint on mobile */
    .mobile-tap-hint { display: block; }

    /* Tooltip: bottom sheet */
    .tooltip {
      max-width: calc(100vw - 24px);
      font-size: 12px;
    }
    .tooltip.mobile-tooltip {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      top: auto !important;
      max-width: 100%;
      width: 100%;
      border-radius: 16px 16px 0 0;
      padding: 16px 18px 24px;
      max-height: 50vh;
      overflow-y: auto;
      box-shadow: 0 -8px 40px rgba(0,0,0,0.15);
      z-index: 1001;
      border: none;
    }
    .tooltip.mobile-tooltip .tt-close {
      position: absolute;
      top: 10px;
      right: 14px;
      color: #aaa;
      font-size: 22px;
      cursor: pointer;
      padding: 4px 8px;
      line-height: 1;
    }
    .tooltip.mobile-tooltip .tt-name { font-size: 15px; margin-bottom: 6px; }
    .tooltip.mobile-tooltip .tt-role { margin: 4px 0; }
    .tooltip-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.2);
      z-index: 1000;
      display: none;
    }
    .tooltip-overlay.show { display: block; }

    /* Welcome modal */
    .welcome-card {
      padding: 32px 24px 28px;
      width: 95%;
      max-width: 420px;
    }
    .welcome-title { font-size: 24px; }
    .welcome-body { font-size: 14px; line-height: 1.6; margin-bottom: 24px; }

    /* Hide MYO panel on mobile */
    #myo-panel { display: none !important; }

    /* Era stepper visible on mobile */
    .era-stepper { display: flex; }

    /* Diagram: no scrolling needed, fits viewport */
    #alluvial-container {
      overflow-x: hidden;
      padding: 4px 0;
    }
  }

  @media (max-width: 480px) {
    header h1 { font-size: 18px; }
    .preset-btn, .preset-btn-all { font-size: 11px; padding: 6px 10px; }
    .presets-bar { padding: 6px 10px; gap: 5px; }
  }