@font-face {
    font-family: 'Virgil';
    src: url('/assets/fonts/Virgil.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
  }

  :root {
    --paper: #fdfaf3;
    --ink: #2a2a2e;
    --blue: #3b6fd4;
    --blue-deep: #2c56a8;
    --yellow: #f6c945;
    --red: #d9534f;
    --night: #232c47;
    --night-ink: #f3efe2;
    --shadow: rgba(60, 50, 20, 0.12);
  }

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

  body {
    font-family: 'Virgil', 'Segoe Print', 'Comic Sans MS', cursive;
    background: var(--paper);
    color: var(--ink);
    overflow-x: hidden;
  }

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 50;
    opacity: 0.35;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.45 0 0 0 0 0.42 0 0 0 0 0.35 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
  }

  #scroll-space { width: 100%; }
  #stage { position: fixed; inset: 0; overflow: hidden; }

  .frame {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4vh 6vw;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  .frame.active { pointer-events: auto; }

  .frame-inner {
    max-width: 980px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5vh;
  }

  .chapter {
    display: inline-block;
    font-size: clamp(0.95rem, 1.8vw, 1.2rem);
    color: var(--blue-deep);
    letter-spacing: 0.06em;
    padding: 0.15em 0.7em;
    border: 2.5px solid var(--blue);
    border-radius: 225px 20px 255px 20px / 20px 255px 20px 225px;
    background: rgba(246, 201, 69, 0.25);
    transform: rotate(-1.2deg);
  }

  h1, h2 { font-weight: normal; line-height: 1.15; }
  h1 { font-size: clamp(2.4rem, 7vw, 5rem); }
  h2 { font-size: clamp(1.6rem, 4vw, 2.8rem); }

  .mark {
    background: linear-gradient(180deg, transparent 58%, rgba(246, 201, 69, 0.55) 58%, rgba(246, 201, 69, 0.55) 92%, transparent 92%);
    padding: 0 0.1em;
  }

  p.caption {
    font-size: clamp(1.1rem, 2.4vw, 1.5rem);
    line-height: 1.5;
    max-width: 34em;
    color: #3d3d44;
  }
  p.caption .b { color: var(--blue-deep); }
  p.specnote {
    font-size: clamp(0.9rem, 1.7vw, 1.1rem);
    color: #85857e;
    transform: rotate(-0.8deg);
  }

  .art-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(0.5rem, 3vw, 2.5rem);
    flex-wrap: wrap;
  }

  .sticker {
    height: clamp(150px, 32vh, 300px);
    width: auto;
    filter: drop-shadow(0 6px 10px var(--shadow));
  }
  .sticker.sm { height: clamp(100px, 20vh, 190px); }
  .sticker.xs { height: clamp(70px, 13vh, 120px); }
  .r-l { transform: rotate(-2.5deg); }
  .r-r { transform: rotate(2deg); }
  .flip { transform: scaleX(-1) rotate(2deg); }

  /* ---- speech bubbles ---- */
  .convo {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: clamp(1rem, 4vw, 3.5rem);
    flex-wrap: wrap;
  }
  .speaker {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.1rem;
    max-width: 340px;
  }
  .bubble {
    font-size: clamp(1rem, 2vw, 1.3rem);
    line-height: 1.35;
    padding: 0.8em 1.1em;
    background: #fffdf6;
    border: 3px solid var(--blue);
    border-radius: 255px 22px 225px 22px / 22px 225px 22px 255px;
    position: relative;
    transform: rotate(-0.6deg);
    box-shadow: 0 4px 8px var(--shadow);
  }
  .bubble::after {
    content: '';
    position: absolute;
    bottom: -13px;
    left: 42px;
    width: 18px;
    height: 18px;
    background: #fffdf6;
    border-right: 3px solid var(--blue);
    border-bottom: 3px solid var(--blue);
    transform: rotate(45deg);
  }
  .bubble.tail-right::after { left: auto; right: 42px; }
  .bubble.aye { color: var(--blue-deep); }

  .who { font-size: clamp(0.9rem, 1.6vw, 1.1rem); color: #6b6b72; }

  /* ---- sticky note ---- */
  .stickynote {
    width: clamp(230px, 30vw, 300px);
    background: #fbe97a;
    padding: 2.2rem 1.4rem 1.6rem;
    transform: rotate(-2.5deg);
    box-shadow: 3px 8px 14px rgba(60, 50, 20, 0.25);
    border-radius: 2px 2px 14px 2px;
    text-align: left;
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.55;
    color: #4a4324;
    position: relative;
  }
  .stickynote::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%) rotate(1.5deg);
    width: 100px;
    height: 26px;
    background: rgba(255, 255, 255, 0.55);
    border-left: 1px dashed rgba(0,0,0,0.08);
    border-right: 1px dashed rgba(0,0,0,0.08);
  }
  .stickynote .note-title {
    display: block;
    margin-bottom: 0.4em;
    border-bottom: 2px solid rgba(74, 67, 36, 0.35);
    padding-bottom: 0.2em;
  }

  /* ---- context meter ---- */
  .ctxmeter {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
  }
  .ctxbar {
    width: clamp(220px, 32vw, 340px);
    height: 26px;
    border: 3px solid var(--ink);
    border-radius: 200px 14px 180px 14px / 14px 180px 14px 200px;
    overflow: hidden;
    background: #fffdf6;
  }
  .ctxbar .fill {
    height: 100%;
    width: 9%;
    background: var(--red);
    opacity: 0.85;
  }
  .ctxmeter .ctxlabel { font-size: clamp(0.9rem, 1.7vw, 1.1rem); color: var(--red); }

  /* ---- title card ---- */
  .titlecard h1 { font-size: clamp(2.2rem, 6.5vw, 4.6rem); max-width: 15em; }
  .titlecard .sub {
    font-size: clamp(1.15rem, 2.6vw, 1.6rem);
    color: #6b6b72;
    margin-top: 1.5vh;
  }

  /* ---- VM box ---- */
  .vmbox {
    border: 3px dashed var(--blue);
    border-radius: 18px 22px 16px 24px;
    padding: clamp(0.6rem, 1.5vw, 1.2rem) clamp(0.8rem, 2vw, 1.6rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    background: rgba(59, 111, 212, 0.05);
    transform: rotate(0.8deg);
  }
  .vmbox .vmlabel { font-size: clamp(0.85rem, 1.6vw, 1.05rem); color: var(--blue-deep); }
  .vmbox .vm-duo { display: flex; align-items: flex-end; gap: clamp(0.3rem, 1vw, 0.8rem); }

  .thought { position: relative; margin-bottom: 8vh; }
  .thought .thought-item {
    position: absolute;
    top: 40%; left: 47%;
    transform: translate(-50%, -50%);
    height: 38%;
  }
  .thought .thought-q {
    position: absolute;
    top: 40%; left: 64%;
    transform: translate(-50%, -50%) rotate(8deg);
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    color: var(--blue-deep);
  }

  .plus { font-size: clamp(2rem, 5vw, 3.2rem); color: var(--blue-deep); }

  .urlpill {
    font-size: clamp(1.15rem, 3vw, 1.9rem);
    color: var(--blue-deep);
    border: 3px solid var(--blue);
    background: #fffdf6;
    padding: 0.35em 0.9em;
    border-radius: 255px 22px 225px 22px / 22px 225px 22px 255px;
    transform: rotate(-1deg);
    box-shadow: 0 4px 8px var(--shadow);
  }

  /* ---- night frame ---- */
  .frame.night { background: var(--night); }
  .frame.night h2, .frame.night p.caption { color: var(--night-ink); }
  .frame.night .mark { background: none; box-shadow: inset 0 -0.14em rgba(246, 201, 69, 0.65); }
  .frame.night p.caption .b { color: #ffd95e; }
  .frame.night .who { color: #b9b4a2; }
  .frame.night .sticker { filter: drop-shadow(0 6px 12px rgba(0,0,0,0.45)); }
  .frame.night .stars {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
      radial-gradient(2px 2px at 12% 22%, #fff8, transparent 60%),
      radial-gradient(2px 2px at 28% 12%, #fff7, transparent 60%),
      radial-gradient(3px 3px at 41% 30%, #fff9, transparent 60%),
      radial-gradient(2px 2px at 58% 15%, #fff6, transparent 60%),
      radial-gradient(2px 2px at 70% 26%, #fff8, transparent 60%),
      radial-gradient(3px 3px at 84% 12%, #fff7, transparent 60%),
      radial-gradient(2px 2px at 92% 34%, #fff6, transparent 60%),
      radial-gradient(2px 2px at 18% 48%, #fff5, transparent 60%),
      radial-gradient(2px 2px at 80% 52%, #fff5, transparent 60%);
  }
  .frame.night .moon {
    position: absolute;
    top: 9vh;
    right: 12vw;
    width: clamp(50px, 8vw, 90px);
    height: clamp(50px, 8vw, 90px);
    border-radius: 50% 48% 52% 50%;
    background: #f6e9b8;
    box-shadow: 0 0 40px 8px rgba(246, 233, 184, 0.35), inset -10px -8px 0 0 rgba(0,0,0,0.07);
    transform: rotate(-8deg);
  }
  .frame.night .zzz {
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    color: #b9b4a2;
    transform: rotate(-6deg);
  }

  /* ---- fact vs skill cards ---- */
  .fvs {
    display: flex;
    gap: clamp(1rem, 3vw, 2.5rem);
    align-items: stretch;
    justify-content: center;
    flex-wrap: wrap;
  }
  .fvs .card {
    width: clamp(220px, 30vw, 320px);
    border: 3px solid var(--ink);
    border-radius: 255px 22px 225px 22px / 22px 225px 22px 255px;
    padding: 1.1rem 1.2rem;
    background: #fffdf6;
    box-shadow: 0 4px 8px var(--shadow);
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.45;
  }
  .fvs .card .cardtag {
    display: block;
    font-size: clamp(0.85rem, 1.6vw, 1.05rem);
    margin-bottom: 0.4em;
    color: #85857e;
  }
  .fvs .card.skill { border-color: var(--blue); transform: rotate(0.8deg); }
  .fvs .card.skill .cardtag { color: var(--blue-deep); }
  .fvs .card.fact { transform: rotate(-1.2deg); color: #6b6b72; }

  /* ---- engine swap ---- */
  .engineswap {
    display: flex;
    align-items: center;
    gap: clamp(0.5rem, 2vw, 1.2rem);
    flex-wrap: wrap;
    justify-content: center;
  }
  .modelpill {
    font-size: clamp(1rem, 2.2vw, 1.4rem);
    padding: 0.3em 0.9em;
    border: 3px solid #9a9a92;
    color: #9a9a92;
    border-radius: 255px 22px 225px 22px / 22px 225px 22px 255px;
    background: #fffdf6;
    text-decoration: line-through;
    transform: rotate(-1.5deg);
  }
  .modelpill.fresh {
    border-color: var(--blue);
    color: var(--blue-deep);
    text-decoration: none;
    transform: rotate(1deg);
    box-shadow: 0 4px 8px var(--shadow);
  }
  .swap-arrow { font-size: clamp(1.4rem, 3vw, 2rem); color: var(--blue-deep); }

  /* ---- flowchart finale ---- */
  .flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(0.4rem, 1.6vw, 1.4rem);
    flex-wrap: nowrap;
    width: 100%;
  }
  .flow-col { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
  .flow .devices { display: flex; gap: 0.4rem; align-items: center; }
  .flow .devices img { height: clamp(38px, 7vh, 64px); filter: drop-shadow(0 3px 5px var(--shadow)); }
  .flow-cap img, .flow-skip img { height: clamp(90px, 17vh, 150px); filter: drop-shadow(0 4px 7px var(--shadow)); }
  .flow-skip .onbox { display: flex; flex-direction: column; align-items: center; }
  .flow-skip .onbox img.machine { height: clamp(44px, 8vh, 72px); margin-top: -8px; }
  .flow-label { font-size: clamp(0.8rem, 1.5vw, 1.05rem); color: #6b6b72; }

  .fleet { display: grid; grid-template-columns: repeat(3, auto); gap: clamp(0.35rem, 1vw, 0.8rem); }
  .fleet .vm-mini {
    border: 2.5px dashed var(--blue);
    border-radius: 12px 16px 10px 18px;
    padding: 0.35rem 0.5rem 0.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(59, 111, 212, 0.05);
  }
  .fleet .vm-mini img { height: clamp(40px, 8vh, 74px); }
  .fleet .vm-mini .duo { display: flex; align-items: flex-end; gap: 2px; }
  .fleet .vm-mini img.vm-ic { height: clamp(24px, 4.5vh, 42px); }
  .fleet .vm-mini span { font-size: clamp(0.6rem, 1.1vw, 0.8rem); color: var(--blue-deep); white-space: nowrap; }

  svg.sk-arrow { width: clamp(40px, 7vw, 90px); height: auto; flex-shrink: 0; }
  svg.sk-arrow path { stroke: var(--blue-deep); stroke-width: 4; fill: none; stroke-linecap: round; stroke-linejoin: round; }

  /* ---- setup recap ---- */
  .recap {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: clamp(0.8rem, 3vw, 2.4rem);
    flex-wrap: wrap;
  }
  .recap .step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    width: clamp(130px, 18vw, 190px);
  }
  .recap .step img { height: clamp(70px, 13vh, 120px); filter: drop-shadow(0 4px 7px var(--shadow)); }
  .recap .num {
    width: 1.9em; height: 1.9em;
    display: flex; align-items: center; justify-content: center;
    border: 2.5px solid var(--blue);
    border-radius: 50% 46% 54% 50%;
    color: var(--blue-deep);
    background: rgba(246, 201, 69, 0.25);
    font-size: clamp(0.9rem, 1.8vw, 1.15rem);
  }
  .recap .steplabel { font-size: clamp(0.9rem, 1.7vw, 1.1rem); line-height: 1.35; color: #3d3d44; }

  /* ---- CTA ---- */
  .cta-row { display: flex; gap: clamp(0.8rem, 2.5vw, 1.6rem); flex-wrap: wrap; justify-content: center; }
  a.cta {
    font-family: inherit;
    font-size: clamp(1.15rem, 2.6vw, 1.6rem);
    color: var(--ink);
    text-decoration: none;
    padding: 0.45em 1.2em;
    border: 3px solid var(--ink);
    border-radius: 255px 22px 225px 22px / 22px 225px 22px 255px;
    background: var(--yellow);
    box-shadow: 0 5px 10px var(--shadow);
    transform: rotate(-1deg);
    transition: transform 0.15s ease;
  }
  a.cta:hover { transform: rotate(-1deg) scale(1.05); }
  a.cta.ghost { background: #fffdf6; transform: rotate(0.8deg); }
  a.cta.ghost:hover { transform: rotate(0.8deg) scale(1.05); }

  /* ---- hero ---- */
  #hero h1 { font-size: clamp(2.8rem, 9vw, 6.5rem); }
  .scroll-cue {
    position: absolute;
    bottom: 5vh;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.1rem;
    color: #8a8a92;
    opacity: 0;
    animation: cue-in 1s ease 2.2s forwards;
  }
  .scroll-cue .chev { display: block; font-size: 1.6rem; animation: bob 1.6s ease-in-out infinite; }
  @keyframes cue-in { to { opacity: 1; } }
  @keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(7px); } }

  /* ---- corner nav ---- */
  .corner {
    position: fixed;
    top: 18px;
    z-index: 70;
    font-size: clamp(0.95rem, 1.8vw, 1.15rem);
    color: var(--blue-deep);
    text-decoration: none;
    background: #fffdf6;
    border: 2.5px solid var(--blue);
    border-radius: 225px 20px 255px 20px / 20px 255px 20px 225px;
    padding: 0.25em 0.85em;
    box-shadow: 0 3px 6px var(--shadow);
    transition: opacity 0.3s, transform 0.15s;
  }
  .corner:hover { transform: scale(1.05); }
  #skip-btn { right: 20px; transform: rotate(1deg); cursor: pointer; font-family: inherit; }
  #docs-link { left: 20px; transform: rotate(-1deg); }
  .corner.hidden { opacity: 0; pointer-events: none; }

  /* ---- progress rail ---- */
  #rail {
    position: fixed;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 9px;
    z-index: 60;
  }
  #rail .dot {
    width: 9px; height: 9px;
    border-radius: 50% 45% 55% 50%;
    border: 2px solid var(--blue-deep);
    background: transparent;
    cursor: pointer;
    padding: 0;
    opacity: 0.45;
    transition: opacity 0.25s, background 0.25s, transform 0.25s;
  }
  #rail .dot.on { background: var(--blue-deep); opacity: 1; transform: scale(1.25); }

  @media (max-width: 720px) {
    #rail { display: none; }
    .sticker { height: clamp(120px, 24vh, 210px); }
    .convo { gap: 0.8rem; }
    .frame { padding: 2.5vh 5vw; }
    .frame-inner { gap: 1.6vh; }
    .flow { flex-direction: column; gap: 0.3rem; }
    .flow .devices { display: none; }
    .flow-cap img, .flow-skip img { height: clamp(60px, 10vh, 95px); }
    .flow-skip .onbox img.machine { height: clamp(30px, 5vh, 44px); margin-top: -4px; }
    svg.sk-arrow { transform: rotate(90deg); width: 34px; }
    .fleet { gap: 0.3rem; }
    .fleet .vm-mini { padding: 0.25rem 0.35rem 0.15rem; }
    .fleet .vm-mini img { height: clamp(28px, 5vh, 42px); }
    .fleet .vm-mini img.vm-ic { height: clamp(16px, 3vh, 25px); }
    .fleet .vm-mini span { font-size: 0.55rem; }
    .flow-label { font-size: 0.75rem; }
    .frame-inner > p.caption { font-size: clamp(0.95rem, 3.6vw, 1.25rem); }
    .recap { gap: 0.6rem; }
    .recap .step { width: 42vw; }
    .recap .step img { height: clamp(55px, 9vh, 85px); }
    .fvs .card { width: 80vw; }
    .frame.night .moon { top: 5vh; right: 8vw; }
  }

  @media (prefers-reduced-motion: reduce) {
    .scroll-cue .chev { animation: none; }
  }
  /* former inline styles (CSP: style-src 'self') */
  .channel-shot { height: clamp(180px, 40vh, 360px); }
  .stack { display: flex; flex-direction: column; align-items: center; gap: 0.35rem; }
  .frame-inner.wide { max-width: 1200px; }

  /* half-opacity legal line (final frame) */
  .legal {
    opacity: 0.5;
    font-size: clamp(0.8rem, 1.5vw, 0.95rem);
    color: var(--ink);
  }
  .legal a { color: inherit; }