.tutorial-trigger {
      --primary-light: var(--primary-soft, #eff6ff);
      display: flex; align-items: center; justify-content: space-between; gap: 12px;
      width: 100%; margin: 12px 0; padding: 12px 14px; border: 1px solid hsl(221 83% 86%);
      border-radius: 10px; background: var(--primary-light); color: var(--primary);
      font: inherit; font-size: 14px; cursor: pointer; text-align: left;
    }
    .tutorial-trigger[hidden] { display: none; }
    .tutorial-trigger:hover { background: hsl(221 83% 93%); border-color: var(--primary); }
    .tutorial-trigger span { display: flex; align-items: center; gap: 8px; }
    .tutorial-trigger strong { font-weight: 600; }
    .tutorial-trigger svg { width: 18px; height: 18px; flex-shrink: 0; }
    .tutorial-dialog {
      --primary-light: var(--primary-soft, #eff6ff);
      --text-primary: var(--text-main, #0f172a);
      --text-secondary: var(--text-sub, #64748b);
      --border: #e2e8f0;
      --muted: #f1f5f9;
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      --shadow-sm: 0 1px 3px rgb(15 23 42 / 8%);
      --shadow-md: 0 4px 8px rgb(15 23 42 / 12%);
      width: min(960px, calc(100% - 24px)); max-height: calc(100dvh - 24px); margin: auto;
      padding: 0; border: 1px solid var(--border); border-radius: 18px;
      color: var(--text-primary); background: white; box-shadow: 0 24px 80px rgb(15 23 42 / 24%);
      overscroll-behavior: contain;
    }
    .tutorial-dialog::backdrop { background: rgb(15 23 42 / 55%); backdrop-filter: blur(5px); }
    .tutorial-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 18px 20px 12px; }
    .tutorial-eyebrow { display: block; color: var(--primary); font-size: 11px; font-weight: 600; margin-bottom: 3px; }
    .tutorial-header h2 { font-size: 20px; line-height: 1.4; }
    .tutorial-header p { font-size: 12px; color: var(--text-secondary); margin-top: 3px; }
    .tutorial-close { width: 32px; height: 32px; flex-shrink: 0; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 50%; background: white; color: var(--text-secondary); cursor: pointer; }
    .tutorial-close svg { width: 17px; height: 17px; }
    .tutorial-close:hover { background: var(--muted); }
    .tutorial-steps { display: flex; gap: 8px; padding: 0 20px 12px; }
    .tutorial-step { flex: 1; display: flex; align-items: center; justify-content: center; gap: 7px; padding: 7px 4px; border: 1px solid var(--border); border-radius: 8px; background: white; color: var(--text-secondary); font: inherit; font-size: 12px; cursor: pointer; white-space: nowrap; }
    .tutorial-step span { display: grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; background: var(--muted); font-size: 11px; font-weight: 600; }
    .tutorial-step[aria-current="step"] { color: var(--primary); border-color: hsl(221 83% 83%); background: var(--primary-light); font-weight: 600; }
    .tutorial-step[aria-current="step"] span { color: white; background: var(--primary); }
    .tutorial-stage { position: relative; margin: 0 20px; border: 1px solid #dce2ec; border-radius: 10px; overflow: hidden; background: #f8fafc; pointer-events: none; }
    .tutorial-browser-tabs { display: flex; align-items: center; gap: 6px; padding: 8px 10px 0; background: #e8edf5; }
    .tutorial-browser-dots { display: flex; gap: 4px; margin-right: 6px; }
    .tutorial-browser-dots i { width: 6px; height: 6px; border-radius: 50%; background: #bdc7d6; }
    .tutorial-browser-tab { padding: 6px 12px; border-radius: 7px 7px 0 0; font-size: 11px; color: #64748b; white-space: nowrap; }
    .tutorial-browser-tab { transition: background-color 220ms ease, color 220ms ease; }
    .tutorial-browser-tab.active { background: white; color: #0f172a; }
    .tutorial-browser-tab.tutorial-tab-target { box-shadow: inset 0 0 0 2px #60a5fa; }
    .tutorial-address { display: flex; align-items: center; gap: 7px; padding: 8px 12px; background: white; border-bottom: 1px solid #e2e8f0; font: 11px var(--font-mono); color: #475569; overflow-wrap: anywhere; }
    .tutorial-address svg { width: 12px; height: 12px; flex-shrink: 0; color: #16a34a; }
    .tutorial-demo { position: relative; height: clamp(260px, calc(100dvh - 395px), 480px); overflow: hidden; }
    .tutorial-scene { position: absolute; inset: 0; }
    .tutorial-scene[hidden] { display: none; }
    .tutorial-scene:not([hidden]) { animation: tutorialSceneIn 260ms ease-out; }
    @keyframes tutorialSceneIn { from { opacity: 0.55; } to { opacity: 1; } }
    .tutorial-demo-label { position: absolute; top: 7px; right: 10px; padding: 2px 5px; border-radius: 4px; background: rgb(255 255 255 / 90%); font-size: 9px; color: #94a3b8; z-index: 6; }
    .tutorial-website-scene { background: radial-gradient(ellipse at 18% 20%, #e5efff, transparent 65%), radial-gradient(ellipse at 85% 90%, #e8f7ff, transparent 65%), white; }
    .tutorial-camera { position: absolute; top: 0; left: 50%; width: 624px; transform: translateX(-50%); }
    .tutorial-page { padding: 16px 0; transform-origin: top center; }
    .tutorial-page .main-card { width: 100%; max-width: none; }
    .tutorial-page .glass-card { width: 100%; max-width: none; margin: 0; }
    .tutorial-page.tutorial-verifying { transition: transform 650ms cubic-bezier(0.22, 1, 0.36, 1); }
    .tutorial-page * { animation: none !important; }
    .tutorial-page .tutorial-hotspot { outline: 3px solid #60a5fa; outline-offset: 3px; background: var(--primary-light); }
    .tutorial-page .tutorial-input-active { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
    .tutorial-page .tutorial-input-filled { border-color: var(--success); }
    .tutorial-page .tutorial-hint-success { color: #15803d; }
    .tutorial-page .tutorial-verify-target { outline: 3px solid #60a5fa; outline-offset: 3px; animation: tutorialVerifyPulse 1.4s ease-in-out infinite !important; }
    @keyframes tutorialVerifyPulse { 0%, 100% { box-shadow: 0 0 0 0 rgb(37 99 235 / 24%); } 50% { box-shadow: 0 0 0 7px rgb(37 99 235 / 7%); } }
    .tutorial-login-scene { background: white; padding: 18px; display: flex; align-items: center; justify-content: center; }
    .tutorial-gpt-login { width: 290px; text-align: center; }
    .tutorial-gpt-brand { position: absolute; top: 10px; left: 14px; font-size: 13px; font-weight: 600; color: #111; }
    .tutorial-gpt-login h3 { font-size: 20px; color: #111; line-height: 1.3; margin-bottom: 9px; font-weight: 600; }
    .tutorial-social { height: 25px; display: flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid #d9d9d9; border-radius: 999px; margin: 4px 0; color: #111; font-size: 10px; }
    .tutorial-social b { width: 13px; font-size: 12px; }
    .tutorial-or { display: flex; align-items: center; gap: 10px; margin: 7px 0; font-size: 9px; line-height: 1.3; color: #666; }
    .tutorial-or::before, .tutorial-or::after { content: ''; flex: 1; height: 1px; background: #e5e5e5; }
    .tutorial-login-email { min-height: 32px; border: 1px solid #aaa; border-radius: 999px; padding: 7px 12px; text-align: left; font-size: 11px; line-height: 16px; color: #111; }
    .tutorial-login-email:empty::before { content: 'Email address'; color: #777; }
    .tutorial-stage[data-login-action="email"] .tutorial-login-email { border-color: #111; box-shadow: 0 0 0 2px #e5e7eb; }
    .tutorial-login-button { height: 32px; display: grid; place-items: center; border-radius: 999px; margin-top: 7px; background: #111; color: white; font-size: 11px; font-weight: 600; }
    .tutorial-login-note { display: none; }
    .tutorial-gpt-home { position: absolute; inset: 0; background: white; display: flex; flex-direction: column; }
    .tutorial-gpt-home[hidden] { display: none; }
    .tutorial-gpt-home-header { padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; gap: 8px; color: #222; font-size: 14px; }
    .tutorial-gpt-account { font-size: 11px; padding: 6px 9px; background: #f4f4f4; border-radius: 999px; }
    .tutorial-gpt-home-main { flex: 1; display: grid; align-content: center; gap: 18px; padding: 20px; max-width: 570px; margin: 0 auto; width: 100%; }
    .tutorial-gpt-home-main h3 { text-align: center; font-size: 24px; color: #222; }
    .tutorial-gpt-prompt { border: 1px solid #dedede; border-radius: 24px; padding: 20px; color: #888; font-size: 13px; background: #fafafa; }
    .tutorial-login-success { text-align: center; font-size: 12px; color: #15803d; }
    .tutorial-code-scene { background: white; }
    .tutorial-code-scroll { position: absolute; inset: 0; padding: 12px 10px 60px; overflow: hidden; }
    .tutorial-code-scene pre { margin: 0; font: 12px/1.55 var(--font-mono); color: #111; white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-all; }
    .tutorial-code-selection { font: inherit; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
    .tutorial-stage[data-scene="copy"][data-phase="action"] .tutorial-code-selection,
    .tutorial-stage[data-scene="copy"][data-phase="done"] .tutorial-code-selection { background: #2563eb; color: white; }
    .tutorial-copy-tools { position: absolute; bottom: 10px; left: 10px; right: 10px; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 10px 12px; border: 1px solid #dce2ec; border-radius: 8px; background: #f8fafc; font-size: 11px; color: #475569; box-shadow: var(--shadow-sm); }
    .tutorial-shortcut { font-weight: 600; }
    .tutorial-copy-badge { color: #15803d; opacity: 0; transition: opacity 0.25s; }
    .tutorial-stage[data-scene="copy"][data-phase="done"] .tutorial-copy-badge { opacity: 1; }
    .tutorial-cursor { position: absolute; width: 24px; height: 30px; top: 0; left: 0; z-index: 8; pointer-events: none; transition: transform 520ms cubic-bezier(0.22, 1, 0.36, 1); will-change: transform; filter: drop-shadow(0 2px 2px rgb(0 0 0 / 20%)); }
    .tutorial-cursor svg { width: 24px; height: 30px; }
    .tutorial-cursor::after { content: ''; position: absolute; width: 28px; height: 28px; left: -11px; top: -10px; border: 2px solid #2563eb; border-radius: 50%; opacity: 0; }
    .tutorial-stage[data-click="true"] .tutorial-cursor::after { animation: tutorialClick 600ms ease-out 1; }
    @keyframes tutorialClick { 0% { opacity: 0.8; transform: scale(0.4); } 100% { opacity: 0; transform: scale(1.6); } }
    .tutorial-caption { display: flex; gap: 10px; align-items: flex-start; padding: 12px 20px; min-height: 78px; }
    .tutorial-caption-number { display: grid; place-items: center; width: 27px; height: 27px; flex-shrink: 0; background: var(--primary-light); color: var(--primary); border-radius: 8px; font-size: 13px; font-weight: 600; }
    .tutorial-caption h3 { font-size: 14px; margin-bottom: 3px; }
    .tutorial-caption p { font-size: 12px; color: var(--text-secondary); line-height: 1.6; }
    .tutorial-caption .tutorial-transfer-summary { margin-top: 3px; color: #15803d; font-weight: 600; }
    .tutorial-caption .tutorial-transfer-summary::before { content: '✓ '; }
    .tutorial-dialog:has([data-copy-state="idle"]) #tutorialCopySummary,
    .tutorial-dialog:has([data-copy-state="selected"]) #tutorialCopySummary { color: var(--primary); }
    .tutorial-progress { height: 3px; background: #e8edf5; margin: 0 20px; overflow: hidden; border-radius: 2px; }
    .tutorial-progress span { display: block; height: 100%; width: 0; background: var(--primary); }
    .tutorial-controls { position: sticky; bottom: 0; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 20px 16px; background: white; z-index: 9; }
    .tutorial-playback { display: flex; align-items: center; gap: 6px; }
    .tutorial-control { padding: 7px 10px; border: 1px solid var(--border); border-radius: 7px; background: white; color: #475569; font: inherit; font-size: 12px; cursor: pointer; }
    .tutorial-control:hover { background: var(--muted); }
    .tutorial-time { margin-left: 5px; font: 11px var(--font-mono); color: #94a3b8; white-space: nowrap; }
    .tutorial-start { padding: 9px 15px; border: none; border-radius: 8px; background: var(--primary); color: white; font: inherit; font-size: 12px; font-weight: 600; cursor: pointer; }
    .tutorial-dialog button:focus-visible, .tutorial-trigger:focus-visible { outline: 3px solid hsl(221 83% 70%); outline-offset: 3px; }
    .tutorial-dialog[data-playing="false"] .tutorial-cursor::after { animation-play-state: paused; }
    .tutorial-dialog[data-playing="false"] .tutorial-verify-target { animation-play-state: paused !important; }
    @media (max-height: 700px) {
      .tutorial-header { padding-top: 14px; padding-bottom: 8px; }
      .tutorial-header p { display: none; }
      .tutorial-steps { padding-bottom: 10px; }
      .tutorial-caption { padding-block: 10px; }
      .tutorial-controls { padding-bottom: 12px; }
    }
    @media (max-height: 660px) and (min-width: 521px) {
      .tutorial-demo { height: 240px; }
      .tutorial-login-scene { padding-block: 8px; }
    }
    @media (max-width: 520px) {
      .tutorial-trigger { font-size: 12px; padding: 11px 12px; }
      .tutorial-dialog { width: calc(100% - 16px); max-height: calc(100dvh - 16px); border-radius: 14px; }
      .tutorial-header { padding: 13px 12px 9px; }
      .tutorial-header h2 { font-size: 17px; }
      .tutorial-header p { font-size: 11px; }
      .tutorial-steps { padding: 0 12px 10px; gap: 4px; }
      .tutorial-step { font-size: 11px; gap: 4px; }
      .tutorial-stage { margin: 0 12px; }
      .tutorial-browser-dots { display: none; }
      .tutorial-browser-tab { padding-inline: 8px; font-size: 10px; }
      .tutorial-address { font-size: 10px; }
      .tutorial-demo { height: clamp(255px, calc(100dvh - 385px), 430px); }
      .tutorial-gpt-login { width: min(260px, 100%); }
      .tutorial-code-scene pre { font-size: 10px; }
      .tutorial-caption { padding: 10px 12px; min-height: 80px; }
      .tutorial-caption p { font-size: 11px; }
      .tutorial-progress { margin: 0 12px; }
      .tutorial-controls { padding: 10px 12px 13px; flex-wrap: wrap; }
      .tutorial-playback { flex: 1; }
      .tutorial-start { width: 100%; }
    }
    @media (max-width: 520px) and (max-height: 740px) {
      .tutorial-header p { display: none; }
      .tutorial-demo { height: 255px; }
      .tutorial-gpt-login h3 { font-size: 20px; margin-bottom: 9px; }
      .tutorial-login-scene { padding-block: 14px; }
      .tutorial-social { height: 26px; }
      .tutorial-login-note { display: none; }
      .tutorial-caption { min-height: 74px; }
    }
    @media (prefers-reduced-motion: reduce) {
      .tutorial-dialog *, .tutorial-trigger { animation: none !important; transition: none !important; }
      .tutorial-page .tutorial-verify-target { animation: none !important; }
      .tutorial-cursor { display: none; }
    }