:root {
    --navy: #0c223f;
    --navy-soft: #18365f;
    --blue: #1a47c8;
    --sky: #83c8ff;
    --green: #5ecf8a;
    --cover-blue: #103aa4;
    --cover-red: #e30000;
    --orange: var(--cover-red);
    --paper: #f7f9fc;
    --ink: #101a2b;
    --muted: #9db0c7;
}

* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
    background: var(--navy);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
a {
    font: inherit;
}

.film {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    color: white;
    background:
        radial-gradient(circle at 14% 20%, rgba(68, 153, 232, 0.23), transparent 32%),
        linear-gradient(135deg, #07182d 0%, #0c223f 48%, #102d50 100%);
    isolation: isolate;
}

.film:focus-visible {
    outline: 3px solid var(--sky);
    outline-offset: -3px;
}

.film-grid {
    position: absolute;
    inset: 0;
    z-index: -2;
    opacity: 0.18;
    background-image:
        linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: linear-gradient(to bottom, black, transparent 82%);
}

.film-glow {
    position: absolute;
    z-index: -1;
    width: 48vw;
    height: 48vw;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.13;
    animation: glow-drift 9s ease-in-out infinite alternate;
}

.film-glow--one {
    top: -32vw;
    right: -8vw;
    background: var(--blue);
}

.film-glow--two {
    bottom: -38vw;
    left: -12vw;
    background: var(--green);
    animation-delay: -3s;
}

.film-brand {
    position: absolute;
    z-index: 50;
    top: clamp(14px, 3.2vw, 28px);
    left: clamp(16px, 3.6vw, 40px);
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255,255,255,0.83);
    font-size: clamp(10px, 1.25vw, 14px);
    font-weight: 700;
    letter-spacing: 0.03em;
}

.brand-mark,
.final-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    color: white;
    background: var(--blue);
    font-size: 10px;
    letter-spacing: 0.06em;
}

.scene {
    position: absolute;
    inset: 0;
    visibility: hidden;
    opacity: 0;
    transform: scale(1.025);
    transition: opacity 700ms ease, transform 900ms cubic-bezier(.2,.7,.2,1), visibility 700ms;
    pointer-events: none;
}

.scene.is-active {
    visibility: visible;
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.eyebrow {
    display: block;
    margin-bottom: 0.75em;
    color: var(--green);
    font-size: clamp(9px, 1.15vw, 14px);
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.scene h1,
.scene h2,
.scene p {
    margin: 0;
}

.scene h1,
.scene h2 {
    font-weight: 750;
    line-height: 1.02;
    letter-spacing: -0.045em;
}

.scene h1 {
    font-size: clamp(31px, 5.5vw, 72px);
}

.scene h2 {
    font-size: clamp(26px, 4.7vw, 62px);
}

.scene h1 em,
.scene h2 em {
    color: var(--sky);
    font-style: normal;
}

.scene p {
    color: #bed0e3;
    font-size: clamp(11px, 1.5vw, 18px);
    line-height: 1.55;
}

.opening-copy {
    position: absolute;
    top: 30%;
    left: 8%;
    z-index: 3;
    max-width: 62%;
}

.scene--opening.is-active .opening-copy {
    animation: copy-rise 900ms 200ms both;
}

.symptom-cloud {
    position: absolute;
    inset: 0;
    opacity: 0.55;
}

.symptom {
    position: absolute;
    padding: 0.6em 1em;
    border: 1px solid rgba(131, 200, 255, 0.24);
    border-radius: 999px;
    color: #c7d8e9;
    background: rgba(12, 34, 63, 0.72);
    box-shadow: 0 12px 38px rgba(0,0,0,0.18);
    font-size: clamp(8px, 1.15vw, 14px);
    animation: symptom-float 5s ease-in-out infinite alternate;
}

.symptom--one { top: 17%; left: 7%; }
.symptom--two { top: 18%; left: 38%; animation-delay: -1.2s; }
.symptom--three { top: 65%; left: 7%; animation-delay: -2.1s; }
.symptom--four { top: 72%; left: 32%; animation-delay: -0.6s; }
.symptom--five { top: 13%; right: 16%; animation-delay: -3s; }
.symptom--six { bottom: 18%; right: 9%; animation-delay: -1.7s; }

.book {
    position: absolute;
    width: clamp(105px, 23vw, 285px);
    aspect-ratio: 0.68;
    filter: drop-shadow(0 32px 28px rgba(0,0,0,0.3));
    transform-style: preserve-3d;
}

.book-cover {
    position: absolute;
    inset: 0;
    z-index: 3;
    display: flex;
    flex-direction: column;
    padding: 0;
    border-radius: 2px 9px 9px 2px;
    overflow: hidden;
    background: var(--cover-blue) url('assets/video-cover.png') center / cover no-repeat;
    border: 1px solid rgba(255,255,255,0.32);
}

.book-cover::before {
    display: none;
}

.book-cover::after {
    display: none;
}

.book-cover > span {
    opacity: 0;
}

.book-spine {
    position: absolute;
    top: 1.5%;
    bottom: 1.5%;
    left: -6%;
    z-index: 2;
    width: 8%;
    border-radius: 6px 0 0 6px;
    background: var(--cover-blue);
    transform: skewY(-8deg);
}

.book-pages {
    position: absolute;
    z-index: 1;
    top: 3%;
    right: -4%;
    width: 8%;
    height: 94%;
    border-radius: 0 7px 7px 0;
    background: repeating-linear-gradient(to bottom, #f8f6ef 0 2px, #d7d3c7 2px 3px);
    transform: skewY(5deg);
}

.book-kicker {
    color: var(--green);
    font-size: clamp(6px, 0.75vw, 10px);
    font-weight: 800;
    letter-spacing: 0.14em;
}

.book-title {
    margin-top: 19%;
    color: white;
    font-size: clamp(24px, 4vw, 52px);
    font-weight: 850;
    line-height: 0.82;
    letter-spacing: -0.06em;
}

.book-rule {
    width: 28%;
    height: 3px;
    margin-top: 12%;
    background: var(--orange);
}

.book-subtitle {
    margin-top: auto;
    color: #cfe0ef;
    font-size: clamp(7px, 0.9vw, 11px);
    line-height: 1.4;
}

.book--opening {
    top: 14%;
    right: 9%;
    transform: perspective(900px) rotateY(-18deg) rotateZ(4deg);
}

.scene--opening.is-active .book--opening {
    animation: book-enter 1.1s 650ms both;
}

.scene-copy--left {
    position: absolute;
    top: 28%;
    left: 7%;
    z-index: 4;
    max-width: 46%;
}

.scene-copy--left p {
    max-width: 30em;
    margin-top: 1.2em;
}

.scene--consolidate.is-active .scene-copy--left {
    animation: copy-rise 850ms 120ms both;
}

.page-fan {
    position: absolute;
    top: 10%;
    right: 3%;
    width: 48%;
    height: 75%;
}

.sample-page {
    position: absolute;
    top: 5%;
    right: 12%;
    width: 44%;
    aspect-ratio: 0.778;
    margin: 0;
    overflow: hidden;
    border-radius: 4px;
    background: white;
    box-shadow: 0 25px 50px rgba(0,0,0,0.33);
    transform-origin: 50% 85%;
}

.sample-page img,
.annotated-page img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sample-page--back { transform: translate(-48%, 6%) rotate(-12deg); opacity: 0.72; }
.sample-page--middle { transform: translate(-23%, 1%) rotate(-4deg); opacity: 0.9; }
.sample-page--front { transform: rotate(6deg); }

.scene--consolidate.is-active .sample-page--back { animation: fan-back 1s 200ms both; }
.scene--consolidate.is-active .sample-page--middle { animation: fan-middle 1s 350ms both; }
.scene--consolidate.is-active .sample-page--front { animation: fan-front 1s 500ms both; }

.page-highlight {
    position: absolute;
    left: 12%;
    height: 3.4%;
    border-radius: 3px;
    background: rgba(255, 209, 71, 0.55);
    mix-blend-mode: multiply;
    transform-origin: left;
}

.page-highlight--one { top: 36%; width: 62%; }
.page-highlight--two { top: 57%; width: 74%; }

.scene--consolidate.is-active .page-highlight {
    animation: highlight-sweep 900ms 1.3s both;
}

.question-card {
    position: absolute;
    top: 18%;
    left: 5%;
    width: 36%;
    padding: 3.2%;
    border: 1px solid rgba(255,255,255,0.13);
    border-radius: 16px;
    background: rgba(244, 248, 252, 0.97);
    color: var(--ink);
    box-shadow: 0 30px 70px rgba(0,0,0,0.28);
}

.question-topline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #67788d;
    font-size: clamp(7px, 0.9vw, 11px);
    font-weight: 700;
}

.question-progress {
    width: 33%;
    height: 4px;
    overflow: hidden;
    border-radius: 99px;
    background: #dce5ed;
}

.question-progress i {
    display: block;
    width: 60%;
    height: 100%;
    background: var(--blue);
}

.question-stem {
    margin: 7% 0 !important;
    color: var(--ink) !important;
    font-size: clamp(9px, 1.25vw, 15px) !important;
    font-weight: 650;
    line-height: 1.45 !important;
}

.answer-row {
    display: flex;
    align-items: center;
    gap: 4%;
    margin-top: 3%;
    padding: 3.2%;
    border: 1px solid #dce4eb;
    border-radius: 8px;
    color: #526274;
    font-size: clamp(7px, 1vw, 12px);
}

.answer-row span {
    display: grid;
    place-items: center;
    width: 19px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: #e7edf3;
    font-size: 0.8em;
    font-weight: 800;
}

.answer-row--selected {
    border-color: #51b27d;
    color: #174a32;
    background: #e9f8ef;
}

.answer-row--selected span {
    color: white;
    background: #3d9968;
}

.lesson-chip {
    position: absolute;
    right: -5%;
    bottom: -6%;
    padding: 3% 6%;
    border-radius: 999px;
    color: #092e1c;
    background: var(--green);
    box-shadow: 0 15px 30px rgba(0,0,0,0.24);
    font-size: clamp(7px, 1vw, 12px);
    font-weight: 800;
}

.scene--questions.is-active .question-card { animation: question-in 900ms 100ms both; }
.scene--questions.is-active .lesson-chip { animation: chip-pop 600ms 1s both; }

.knowledge-path {
    position: absolute;
    top: 45%;
    left: 43%;
    width: 9%;
    height: 5px;
    display: flex;
    justify-content: space-between;
}

.knowledge-path i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 14px var(--green);
    animation: path-pulse 1.2s infinite;
}

.knowledge-path i:nth-child(2) { animation-delay: 180ms; }
.knowledge-path i:nth-child(3) { animation-delay: 360ms; }

.annotated-page {
    position: absolute;
    top: 12%;
    right: 9%;
    width: 24%;
    aspect-ratio: 0.778;
    border-radius: 5px;
    overflow: visible;
    background: white;
    box-shadow: 0 30px 60px rgba(0,0,0,0.3);
    transform: rotate(4deg);
}

.annotated-page img {
    border-radius: 5px;
}

.annotation {
    position: absolute;
    z-index: 2;
    padding: 2.5% 4%;
    border-radius: 3px;
    color: #0a6c42;
    background: rgba(230, 255, 239, 0.94);
    box-shadow: 0 6px 14px rgba(0,0,0,0.12);
    font: 700 clamp(7px, 0.9vw, 12px) "Comic Sans MS", cursive;
    transform: rotate(-5deg);
}

.annotation--one { top: 55%; right: -20%; }
.annotation--two { left: -26%; bottom: 30%; transform: rotate(4deg); }

.annotation-ring {
    position: absolute;
    z-index: 2;
    top: 52%;
    left: 5%;
    width: 90%;
    height: 13%;
    border: 3px solid rgba(242, 122, 54, 0.82);
    border-radius: 50%;
    transform: rotate(-6deg);
}

.scene--questions.is-active .annotated-page { animation: page-in 900ms 300ms both; }
.scene--questions.is-active .annotation--one { animation: note-in 650ms 1.2s both; }
.scene--questions.is-active .annotation--two { animation: note-in-two 650ms 1.6s both; }

.questions-copy {
    position: absolute;
    right: 5%;
    bottom: 16%;
    z-index: 4;
    text-align: right;
}

.questions-copy h2 {
    font-size: clamp(22px, 3.2vw, 42px);
}

.scene--questions.is-active .questions-copy { animation: copy-rise 800ms 1.8s both; }

.laptop {
    position: absolute;
    top: 24%;
    left: 6%;
    width: 39%;
}

.laptop-screen {
    position: relative;
    width: 78%;
    aspect-ratio: 1.55;
    margin-inline: auto;
    padding: 9%;
    border: 8px solid #15283e;
    border-radius: 10px 10px 4px 4px;
    background: #e7edf4;
    box-shadow: 0 30px 60px rgba(0,0,0,0.26);
    transform-origin: bottom;
}

.laptop-base {
    width: 100%;
    height: 16px;
    border-radius: 2px 2px 14px 14px;
    background: linear-gradient(#b8c4cf, #6f7e8e);
    box-shadow: 0 14px 30px rgba(0,0,0,0.25);
}

.screen-line {
    display: block;
    height: 5%;
    margin-bottom: 5%;
    border-radius: 99px;
    background: #a7b8c9;
}

.screen-line--one { width: 62%; background: #4a8ac4; }
.screen-line--two { width: 84%; }
.screen-line--three { width: 72%; }
.screen-card {
    display: block;
    width: 100%;
    height: 39%;
    margin-top: 8%;
    border-radius: 5px;
    background: linear-gradient(135deg, #d6e6f3, #b9cfdf);
}

.closing-line {
    position: absolute;
    left: 7%;
    bottom: 20%;
    width: 36%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}

.scene--tangible.is-active .laptop { animation: laptop-away 2.2s 200ms both; }

.book--tangible {
    top: 12%;
    left: 19%;
    transform: perspective(900px) rotateY(-14deg) rotateZ(-4deg) scale(0.85);
    opacity: 0;
}

.scene--tangible.is-active .book--tangible { animation: tangible-book 1.2s 1.25s both; }

.book-tab {
    position: absolute;
    z-index: 0;
    right: -8%;
    width: 14%;
    height: 5%;
    border-radius: 0 4px 4px 0;
    background: var(--orange);
}

.book-tab--one { top: 22%; }
.book-tab--two { top: 41%; background: var(--green); }
.book-tab--three { top: 65%; background: var(--sky); }

.tangible-copy {
    position: absolute;
    top: 29%;
    right: 7%;
    width: 48%;
}

.tangible-copy p {
    max-width: 32em;
    margin-top: 1.2em;
}

.scene--tangible.is-active .tangible-copy { animation: copy-rise 900ms 1.7s both; }

.pricing-copy {
    position: absolute;
    top: 13%;
    width: 100%;
    text-align: center;
}

.pricing-copy h2 {
    font-size: clamp(25px, 3.9vw, 50px);
}

.scene--pricing.is-active .pricing-copy { animation: copy-rise 850ms 100ms both; }

.price-cards {
    position: absolute;
    top: 44%;
    left: 50%;
    display: grid;
    grid-template-columns: repeat(2, minmax(170px, 260px));
    gap: clamp(12px, 2vw, 24px);
    transform: translateX(-50%);
}

.price-card {
    position: relative;
    min-height: clamp(115px, 17vw, 180px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(16px, 2.5vw, 30px);
    border: 1px solid rgba(255,255,255,0.16);
    border-radius: 14px;
    background: rgba(255,255,255,0.075);
    box-shadow: 0 24px 50px rgba(0,0,0,0.2);
    backdrop-filter: blur(12px);
}

.price-card--featured {
    border-color: rgba(94,207,138,0.55);
    background: linear-gradient(145deg, rgba(94,207,138,0.18), rgba(255,255,255,0.08));
}

.price-label {
    color: #c7d6e5;
    font-size: clamp(9px, 1vw, 12px);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.price-card strong {
    margin-block: 4% 1%;
    font-size: clamp(40px, 6vw, 72px);
    line-height: 1;
    letter-spacing: -0.06em;
}

.price-card sup {
    top: -0.65em;
    margin-right: 4px;
    color: var(--green);
    font-size: 0.32em;
}

.price-detail {
    color: #aebfd1;
    font-size: clamp(8px, 1.05vw, 13px);
}

.program-pill {
    position: absolute;
    top: -10px;
    right: 16px;
    padding: 6px 10px;
    border-radius: 999px;
    color: #092b1a;
    background: var(--green);
    font-size: clamp(7px, 0.7vw, 9px);
    font-weight: 850;
    letter-spacing: 0.09em;
}

.scene--pricing.is-active .price-card:first-child { animation: price-in 750ms 500ms both; }
.scene--pricing.is-active .price-card:last-child { animation: price-in 750ms 700ms both; }

.fraction-line {
    position: absolute;
    bottom: 13%;
    width: 100%;
    text-align: center;
    font-size: clamp(9px, 1.2vw, 14px) !important;
}

.scene--pricing.is-active .fraction-line { animation: copy-rise 700ms 1.15s both; }

.final-lockup {
    position: absolute;
    top: 24%;
    left: 10%;
    z-index: 3;
}

.final-mark {
    width: clamp(38px, 5vw, 58px);
    height: clamp(38px, 5vw, 58px);
    margin-bottom: 6%;
    font-size: clamp(10px, 1.2vw, 14px);
    box-shadow: 0 0 0 7px rgba(68,153,232,0.12);
}

.final-lockup h2 {
    font-size: clamp(29px, 4.35vw, 58px);
}

.final-lockup p {
    margin-top: 3%;
    color: white;
    font-size: clamp(12px, 1.5vw, 18px);
    font-weight: 750;
    letter-spacing: 0.05em;
}

.film-cta {
    display: inline-flex;
    align-items: center;
    gap: 1.2em;
    margin-top: 8%;
    padding: 0.9em 1.2em;
    border-radius: 8px;
    color: #102038;
    background: white;
    box-shadow: 0 16px 35px rgba(0,0,0,0.22);
    font-size: clamp(10px, 1.2vw, 14px);
    font-weight: 800;
    text-decoration: none;
    transition: transform 180ms ease, background 180ms ease;
}

.film-cta:hover,
.film-cta:focus-visible {
    transform: translateY(-2px);
    background: #e8f5ff;
}

.film-cta span {
    color: var(--blue);
    font-size: 1.25em;
}

.final-book {
    position: absolute;
    inset: 0 0 0 52%;
    overflow: hidden;
}

.book--final {
    top: 8%;
    left: 24%;
    width: clamp(125px, 27vw, 335px);
    transform: perspective(1000px) rotateY(-15deg) rotateZ(5deg);
}

.scene--final.is-active .final-lockup { animation: copy-rise 900ms 150ms both; }
.scene--final.is-active .book--final { animation: final-book 1s 250ms both; }

.start-card {
    position: absolute;
    z-index: 80;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    width: 100%;
    border: 0;
    color: white;
    background: rgba(4, 15, 28, 0.2);
    cursor: pointer;
    transition: opacity 350ms ease, visibility 350ms;
}

.start-card.is-hidden {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.start-icon {
    display: grid;
    place-items: center;
    width: clamp(52px, 7vw, 78px);
    height: clamp(52px, 7vw, 78px);
    padding-left: 0.28em;
    border: 1px solid rgba(255,255,255,0.4);
    border-radius: 50%;
    background: rgba(68,153,232,0.9);
    box-shadow: 0 18px 45px rgba(0,0,0,0.28), 0 0 0 10px rgba(68,153,232,0.12);
    font-size: clamp(18px, 2.3vw, 28px);
    transition: transform 180ms ease;
}

.start-card:hover .start-icon,
.start-card:focus-visible .start-icon {
    transform: scale(1.06);
}

.start-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
    text-align: left;
}

.start-copy strong {
    font-size: clamp(16px, 2.3vw, 27px);
}

.start-copy small {
    color: #c3d4e5;
    font-size: clamp(9px, 1.1vw, 13px);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.film-notice {
    position: absolute;
    z-index: 78;
    top: clamp(48px, 10%, 72px);
    left: 50%;
    max-width: min(90%, 420px);
    padding: 0.55em 0.9em;
    border: 1px solid rgba(131, 200, 255, 0.28);
    border-radius: 999px;
    color: #e8f3ff;
    background: rgba(8, 24, 42, 0.88);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
    font-size: clamp(10px, 1.2vw, 13px);
    font-weight: 650;
    text-align: center;
    transform: translateX(-50%);
    pointer-events: none;
}

.film-notice[hidden] {
    display: none;
}

.caption {
    position: absolute;
    z-index: 70;
    left: 50%;
    bottom: calc(clamp(39px, 7.5vw, 56px) + 10px);
    max-width: min(84%, 760px);
    padding: 0.55em 0.85em;
    border-radius: 5px;
    color: white;
    background: rgba(2, 10, 18, 0.78);
    box-shadow: 0 8px 22px rgba(0,0,0,0.23);
    font-size: clamp(9px, 1.35vw, 16px);
    font-weight: 650;
    line-height: 1.35;
    text-align: center;
    transform: translateX(-50%);
    transition: opacity 200ms ease;
}

.caption.is-hidden {
    opacity: 0;
    visibility: hidden;
}

.mute-icon {
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    line-height: 0;
}

.mute-icon svg {
    display: block;
    width: clamp(14px, 1.6vw, 18px);
    height: clamp(14px, 1.6vw, 18px);
}

.film-controls {
    position: absolute;
    z-index: 75;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: auto auto auto 1fr auto;
    align-items: center;
    gap: clamp(5px, 1vw, 12px);
    height: clamp(39px, 7.5vw, 56px);
    padding: 0 clamp(10px, 2.3vw, 24px);
    background: linear-gradient(transparent, rgba(2,9,17,0.82));
}

.control-button {
    display: grid;
    place-items: center;
    width: clamp(27px, 3.4vw, 38px);
    height: clamp(27px, 3.4vw, 38px);
    padding: 0;
    border: 0;
    border-radius: 50%;
    color: white;
    background: transparent;
    cursor: pointer;
    font-size: clamp(10px, 1.2vw, 14px);
    line-height: 1;
}

#playIcon {
    letter-spacing: -0.12em;
    font-size: 0.95em;
}

.control-button:hover,
.control-button:focus-visible {
    background: rgba(255,255,255,0.12);
}

.control-button--cc {
    width: auto;
    padding-inline: 8px;
    border-radius: 5px;
    color: #9eb1c5;
    font-size: clamp(8px, 0.9vw, 11px);
    font-weight: 850;
}

.control-button--cc.is-on {
    color: white;
    text-decoration: underline;
    text-decoration-color: var(--green);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

.timecode {
    min-width: 73px;
    color: #c6d3e0;
    font-size: clamp(8px, 0.9vw, 11px);
    font-variant-numeric: tabular-nums;
}

.timeline {
    position: relative;
    height: 4px;
    border-radius: 99px;
    background: rgba(255,255,255,0.23);
    cursor: pointer;
}

.timeline::after {
    content: "";
    position: absolute;
    inset: -8px 0;
}

.timeline-fill {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: var(--green);
    box-shadow: 0 0 10px rgba(94,207,138,0.45);
}

@keyframes copy-rise {
    from { opacity: 0; transform: translateY(22px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes book-enter {
    from { opacity: 0; transform: perspective(900px) translateX(90px) rotateY(-30deg) rotateZ(9deg) scale(.86); }
    to { opacity: 1; transform: perspective(900px) translateX(0) rotateY(-18deg) rotateZ(4deg) scale(1); }
}

@keyframes symptom-float {
    from { transform: translate3d(-4px, -5px, 0); }
    to { transform: translate3d(7px, 9px, 0); }
}

@keyframes glow-drift {
    to { transform: translate(7vw, 5vw) scale(1.13); }
}

@keyframes fan-back {
    from { opacity: 0; transform: translate(-25%, 10%) rotate(0) scale(.88); }
    to { opacity: .72; transform: translate(-48%, 6%) rotate(-12deg) scale(1); }
}

@keyframes fan-middle {
    from { opacity: 0; transform: translate(-10%, 7%) rotate(0) scale(.9); }
    to { opacity: .9; transform: translate(-23%, 1%) rotate(-4deg) scale(1); }
}

@keyframes fan-front {
    from { opacity: 0; transform: translate(15%, 7%) rotate(0) scale(.9); }
    to { opacity: 1; transform: translate(0, 0) rotate(6deg) scale(1); }
}

@keyframes highlight-sweep {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
}

@keyframes question-in {
    from { opacity: 0; transform: translateX(-50px) scale(.94); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes page-in {
    from { opacity: 0; transform: translateX(60px) rotate(9deg) scale(.92); }
    to { opacity: 1; transform: translateX(0) rotate(4deg) scale(1); }
}

@keyframes chip-pop {
    from { opacity: 0; transform: scale(.6); }
    70% { transform: scale(1.08); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes note-in {
    from { opacity: 0; transform: translateY(8px) rotate(-5deg) scale(.82); }
    to { opacity: 1; transform: translateY(0) rotate(-5deg) scale(1); }
}

@keyframes note-in-two {
    from { opacity: 0; transform: translateY(8px) rotate(4deg) scale(.82); }
    to { opacity: 1; transform: translateY(0) rotate(4deg) scale(1); }
}

@keyframes path-pulse {
    0%, 100% { opacity: .25; transform: scale(.7); }
    50% { opacity: 1; transform: scale(1); }
}

@keyframes laptop-away {
    0%, 40% { opacity: 1; transform: translateX(0) scale(1); }
    65% { opacity: 1; transform: translateX(-5%) scale(.95); }
    100% { opacity: 0; transform: translateX(-28%) scale(.87); }
}

@keyframes tangible-book {
    from { opacity: 0; transform: perspective(900px) translateX(80px) rotateY(-24deg) rotateZ(1deg) scale(.78); }
    to { opacity: 1; transform: perspective(900px) translateX(0) rotateY(-14deg) rotateZ(-4deg) scale(.85); }
}

@keyframes price-in {
    from { opacity: 0; transform: translateY(30px) scale(.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes final-book {
    from { opacity: 0; transform: perspective(1000px) translateX(70px) rotateY(-22deg) rotateZ(10deg) scale(.9); }
    to { opacity: 1; transform: perspective(1000px) translateX(0) rotateY(-15deg) rotateZ(5deg) scale(1); }
}

@media (max-width: 620px) {
    .film-brand span:last-child { display: none; }
    .opening-copy { left: 7%; max-width: 68%; }
    .book--opening { right: 4%; opacity: .72; }
    .scene-copy--left { top: 24%; left: 6%; max-width: 51%; }
    .page-fan { right: -5%; width: 55%; }
    .question-card { left: 3%; width: 43%; }
    .annotated-page { right: 7%; width: 29%; }
    .questions-copy { right: 4%; bottom: 18%; }
    .laptop { left: 1%; width: 45%; }
    .book--tangible { left: 12%; }
    .tangible-copy { right: 5%; width: 52%; }
    .price-cards { width: 84%; grid-template-columns: repeat(2, 1fr); }
    .price-card { min-height: 100px; }
    .final-lockup { left: 7%; }
    .final-book { left: 47%; }
    .book--final { left: 17%; }
    .annotation--one { right: -8%; }
    .annotation--two { left: -12%; }
    .caption {
        max-width: min(92%, 760px);
        font-size: clamp(10px, 2.8vw, 14px);
    }
}

@media (max-height: 360px) {
    .film-brand {
        top: 9px;
        left: 12px;
    }

    .brand-mark {
        width: 25px;
        height: 25px;
        font-size: 7px;
    }

    .opening-copy,
    .scene-copy--left,
    .tangible-copy {
        top: 18%;
    }

    .opening-copy {
        max-width: 62%;
    }

    .scene h1 {
        font-size: clamp(18px, 5vw, 48px);
    }

    .scene h2 {
        font-size: clamp(16px, 4.2vw, 40px);
    }

    .scene p {
        display: none;
    }

    .eyebrow {
        margin-bottom: 0.35em;
        font-size: clamp(8px, 1.1vw, 11px);
    }

    .book--opening,
    .book--tangible {
        top: 7%;
    }

    .question-card {
        top: 10%;
        padding: 2%;
        width: 40%;
    }

    .annotated-page {
        top: 7%;
        width: 22%;
    }

    .annotation {
        display: none;
    }

    .questions-copy {
        bottom: 22%;
    }

    .questions-copy h2 {
        font-size: clamp(14px, 3vw, 28px);
    }

    .pricing-copy {
        top: 8%;
    }

    .price-cards {
        top: 38%;
        gap: 8px;
    }

    .price-card {
        min-height: 58px;
        padding: 8px;
    }

    .price-card strong {
        font-size: clamp(24px, 5.5vw, 48px);
    }

    .program-pill {
        top: -8px;
        right: 8px;
        padding: 3px 7px;
    }

    .fraction-line {
        display: none;
    }

    .final-lockup {
        top: 12%;
    }

    .book--final {
        top: 4%;
    }

    .start-icon {
        width: 44px;
        height: 44px;
    }

    .start-copy {
        display: none;
    }

    .film-cta {
        margin-top: 1%;
        padding: 0.55em 0.85em;
    }

    .film-controls {
        height: 34px;
        gap: 6px;
        padding-inline: 8px;
    }

    .control-button {
        width: 26px;
        height: 26px;
    }

    .timecode {
        min-width: 62px;
        font-size: 9px;
    }

    .caption {
        bottom: calc(34px + 6px);
        max-width: min(94%, 760px);
        padding: 0.35em 0.6em;
        font-size: clamp(9px, 2.4vw, 12px);
    }

    .film-notice {
        top: 36px;
        font-size: 10px;
        padding: 0.4em 0.7em;
    }

    .symptom {
        font-size: 8px;
        padding: 0.35em 0.6em;
    }

    .lesson-chip {
        font-size: 8px;
    }
}

@media (max-height: 240px) {
    .film-brand {
        display: none;
    }

    .scene p,
    .eyebrow,
    .fraction-line,
    .price-detail,
    .program-pill {
        display: none;
    }

    .caption {
        bottom: 30px;
        font-size: 9px;
        line-height: 1.2;
    }

    .film-controls {
        height: 28px;
    }

    .price-cards {
        top: 42%;
        width: 70%;
    }

    .price-card {
        min-height: 44px;
        padding: 6px;
    }

    .price-card strong {
        font-size: clamp(18px, 5vw, 32px);
        margin-block: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .film-glow,
    .symptom,
    .knowledge-path i {
        animation: none !important;
    }

    .scene,
    .start-card,
    .caption,
    .film-cta,
    .control-button {
        transition: none !important;
    }

    .scene.is-active .opening-copy,
    .scene.is-active .book--opening,
    .scene.is-active .scene-copy--left,
    .scene.is-active .sample-page--back,
    .scene.is-active .sample-page--middle,
    .scene.is-active .sample-page--front,
    .scene.is-active .page-highlight,
    .scene.is-active .question-card,
    .scene.is-active .lesson-chip,
    .scene.is-active .annotated-page,
    .scene.is-active .annotation--one,
    .scene.is-active .annotation--two,
    .scene.is-active .questions-copy,
    .scene.is-active .laptop,
    .scene.is-active .book--tangible,
    .scene.is-active .tangible-copy,
    .scene.is-active .pricing-copy,
    .scene.is-active .price-card,
    .scene.is-active .fraction-line,
    .scene.is-active .final-lockup,
    .scene.is-active .book--final {
        animation: none !important;
        opacity: 1 !important;
        visibility: visible;
    }

    .scene:not(.is-active) {
        opacity: 0;
        visibility: hidden;
        transform: none;
    }

    .scene.is-active {
        transform: none;
    }

    .scene.is-active .book--opening {
        transform: perspective(900px) rotateY(-18deg) rotateZ(4deg) !important;
    }

    .scene.is-active .sample-page--back {
        transform: translate(-48%, 6%) rotate(-12deg) !important;
        opacity: 0.72 !important;
    }

    .scene.is-active .sample-page--middle {
        transform: translate(-23%, 1%) rotate(-4deg) !important;
        opacity: 0.9 !important;
    }

    .scene.is-active .sample-page--front {
        transform: rotate(6deg) !important;
    }

    .scene.is-active .annotated-page {
        transform: rotate(4deg) !important;
    }

    .scene.is-active .laptop {
        opacity: 0 !important;
    }

    .scene.is-active .book--tangible {
        opacity: 1 !important;
        transform: perspective(900px) rotateY(-14deg) rotateZ(-4deg) scale(0.85) !important;
    }

    .scene.is-active .book--final {
        transform: perspective(1000px) rotateY(-15deg) rotateZ(5deg) !important;
    }
}