:root {
    --background: #f2f0e9;
    --foreground: #101010;
    --accent: #d8ff00;
    --muted: #5f5f59;
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
    margin: 0;
}

body {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
    background: var(--background);
    color: var(--foreground);
    font-family:
        "Helvetica Neue",
        Helvetica,
        Arial,
        sans-serif;
}

.hero {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: center;
    padding: clamp(28px, 6vw, 100px);
}

.eyebrow {
    margin-bottom: 4rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.22em;
}

h1 {
    max-width: 1100px;
    margin: 0;
    font-size: clamp(4rem, 12vw, 12rem);
    font-weight: 300;
    letter-spacing: -0.075em;
    line-height: 0.78;
}

.introduction {
    max-width: 690px;
    margin: clamp(45px, 7vw, 90px) 0 0 auto;
    color: var(--muted);
    font-size: clamp(1.1rem, 2vw, 1.7rem);
    font-weight: 400;
    line-height: 1.35;
}

.status {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 44px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.status-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 35px var(--accent);
}

footer {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    border-top: 1px solid var(--foreground);
    padding: 18px clamp(28px, 6vw, 100px);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.16em;
}

@media (max-width: 700px) {
    .hero {
        justify-content: flex-start;
        padding-top: 80px;
    }

    .eyebrow {
        margin-bottom: 3rem;
    }

    h1 {
        font-size: clamp(4rem, 19vw, 7rem);
    }

    .introduction {
        margin-left: 0;
    }

    footer {
        flex-wrap: wrap;
    }
}

/* =========================================================
   RESEARCH PROGRAMS
   ========================================================= */

.research {
    border-top: 1px solid var(--foreground);
    padding:
        clamp(80px, 11vw, 170px) clamp(28px, 6vw, 100px);
}

.section-heading {
    display: grid;
    grid-template-columns: minmax(160px, 0.55fr) minmax(0, 1.45fr);
    gap: clamp(40px, 8vw, 150px);
    margin-bottom: clamp(70px, 9vw, 130px);
}

.section-index {
    margin: 8px 0 0;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    line-height: 1.4;
    text-transform: uppercase;
}

.section-heading h2 {
    max-width: 900px;
    margin: 0;
    font-size: clamp(3.2rem, 7.5vw, 8rem);
    font-weight: 300;
    letter-spacing: -0.065em;
    line-height: 0.9;
}

.section-intro {
    max-width: 650px;
    margin: 40px 0 0;
    color: var(--muted);
    font-size: clamp(1.05rem, 1.7vw, 1.45rem);
    line-height: 1.45;
}


/* =========================================================
   PROJECT GRID
   ========================================================= */

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 1px solid var(--foreground);
    border-left: 1px solid var(--foreground);
}

.project-card {
    position: relative;
    display: flex;
    min-height: 620px;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid var(--foreground);
    border-bottom: 1px solid var(--foreground);
    padding: clamp(28px, 3.5vw, 56px);
    background: transparent;
    transition:
        background-color 220ms ease,
        transform 220ms ease;
}

.project-card::before {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 5px;
    background: var(--accent);
    content: "";
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 260ms ease;
}

.project-card:hover {
    background: rgba(255, 255, 255, 0.42);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.project-number {
    font-size: 0.69rem;
    font-weight: 700;
    letter-spacing: 0.18em;
}

.project-status {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    border: 1px solid var(--foreground);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.project-status__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
}

.project-status--live .project-status__dot {
    background: var(--accent);
    box-shadow: 0 0 18px var(--accent);
}

.project-status--prototype,
.project-status--alpha,
.project-status--research {
    color: var(--muted);
}

.project-card__body {
    margin-top: clamp(90px, 11vw, 150px);
}

.project-field {
    margin: 0 0 22px;
    color: var(--muted);
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.19em;
    text-transform: uppercase;
}

.project-card h3 {
    max-width: 620px;
    margin: 0;
    font-size: clamp(2.7rem, 4.5vw, 5.5rem);
    font-weight: 300;
    letter-spacing: -0.06em;
    line-height: 0.93;
}

.project-description {
    max-width: 610px;
    margin: 38px 0 0;
    color: var(--muted);
    font-size: clamp(1rem, 1.35vw, 1.24rem);
    line-height: 1.55;
}


/* =========================================================
   PROJECT DATA
   ========================================================= */

.project-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: auto 0 0;
    border-top: 1px solid var(--foreground);
}

.project-meta div {
    min-width: 0;
    padding: 22px 16px 22px 0;
}

.project-meta div+div {
    border-left: 1px solid rgba(16, 16, 16, 0.2);
    padding-left: 18px;
}

.project-meta dt {
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.project-meta dd {
    margin: 0;
    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1.3;
}


/* =========================================================
   PROJECT LINK
   ========================================================= */

.project-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 34px;
    border-top: 1px solid var(--foreground);
    padding-top: 22px;
    color: var(--foreground);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-decoration: none;
    text-transform: uppercase;
}

.project-link span {
    display: inline-block;
    font-size: 1.25rem;
    transition: transform 180ms ease;
}

.project-link:hover span {
    transform: translateX(5px);
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 960px) {
    .section-heading {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .project-card {
        min-height: 570px;
    }

    .project-card__body {
        margin-top: 85px;
    }
}

@media (max-width: 620px) {
    .research {
        padding:
            75px 22px;
    }

    .project-card {
        min-height: auto;
        padding: 26px 22px 30px;
    }

    .project-card__top {
        align-items: flex-start;
    }

    .project-card__body {
        margin-top: 75px;
    }

    .project-description {
        margin-top: 28px;
    }

    .project-meta {
        grid-template-columns: 1fr;
        margin-top: 80px;
    }

    .project-meta div {
        padding: 16px 0;
    }

    .project-meta div+div {
        border-top: 1px solid rgba(16, 16, 16, 0.2);
        border-left: 0;
        padding-left: 0;
    }
}

/* =========================================================
   PRECEPTRESS TECHNICAL BACKGROUND SYSTEM
   ========================================================= */

.research {
    position: relative;
    overflow: hidden;

    background-image:
        linear-gradient(rgba(16, 16, 16, 0.025) 1px,
            transparent 1px),
        linear-gradient(90deg,
            rgba(16, 16, 16, 0.025) 1px,
            transparent 1px);

    background-size:
        72px 72px,
        72px 72px;
}


/* Large, nearly invisible laboratory network behind the section */

.research::before {
    position: absolute;
    top: 110px;
    right: -180px;
    width: 760px;
    height: 760px;
    border: 1px solid rgba(16, 16, 16, 0.045);
    border-radius: 50%;
    content: "";
    pointer-events: none;

    background:
        radial-gradient(circle at 28% 32%,
            rgba(198, 255, 0, 0.45) 0 4px,
            transparent 5px),
        radial-gradient(circle at 62% 19%,
            rgba(16, 16, 16, 0.15) 0 3px,
            transparent 4px),
        radial-gradient(circle at 76% 57%,
            rgba(16, 16, 16, 0.12) 0 4px,
            transparent 5px),
        radial-gradient(circle at 40% 74%,
            rgba(16, 16, 16, 0.12) 0 3px,
            transparent 4px);

    opacity: 0.55;
}


/* Thin colored registration line */

.research::after {
    position: absolute;
    top: 0;
    left: clamp(28px, 6vw, 100px);
    width: min(320px, 36vw);
    height: 3px;
    content: "";
    pointer-events: none;

    background:
        linear-gradient(90deg,
            var(--accent) 0 24%,
            #ff8a4c 24% 50%,
            #7198ff 50% 74%,
            transparent 74% 100%);
}


/* Keep all actual content above the graphics */

.section-heading,
.project-grid {
    position: relative;
    z-index: 2;
}

/* =========================================================
   SECTION HEADING — NUMBER ONLY
   ========================================================= */

.section-index {
    position: relative;
    padding-top: 0;
}

.section-index::before {
    display: none;
    content: none;
}



/* =========================================================
   PROJECT CARD TECHNICAL GRAPHICS
   ========================================================= */

.project-card {
    isolation: isolate;
}

.project-card>* {
    position: relative;
    z-index: 3;
}


/*
The existing ::before element remains the animated top line.
The new ::after element creates each card's technical graphic.
*/

.project-card::after {
    position: absolute;
    z-index: 1;
    right: -35px;
    bottom: -35px;
    width: 330px;
    height: 330px;
    content: "";
    pointer-events: none;

    opacity: 0.07;
    transition:
        opacity 300ms ease,
        transform 500ms ease;
}

.project-card:hover::after {
    opacity: 0.13;
    transform: translate3d(-8px, -8px, 0);
}


/* ---------------------------------------------------------
   PR—001: Hacking Baseball
   Strike zone, field geometry, trajectory marks
   --------------------------------------------------------- */

.project-card--baseball::after {
    border: 1px solid var(--foreground);
    border-radius: 50%;

    background:
        linear-gradient(90deg,
            transparent 49.5%,
            var(--foreground) 49.5% 50.5%,
            transparent 50.5%),
        linear-gradient(transparent 49.5%,
            var(--foreground) 49.5% 50.5%,
            transparent 50.5%),
        linear-gradient(45deg,
            transparent 42%,
            var(--foreground) 42% 42.6%,
            transparent 42.6% 57.4%,
            var(--foreground) 57.4% 58%,
            transparent 58%);
}

.project-card--baseball .project-field::before {
    content: "◆ ";
    color: var(--accent);
}


/* ---------------------------------------------------------
   PR—002: PulseOS
   Clinical pulse waveform
   --------------------------------------------------------- */

.project-card--pulse::after {
    width: 390px;
    height: 220px;
    border-top: 1px solid var(--foreground);
    border-bottom: 1px solid var(--foreground);

    background:
        linear-gradient(110deg,
            transparent 0 15%,
            var(--foreground) 15% 15.7%,
            transparent 15.7% 23%,
            var(--foreground) 23% 23.7%,
            transparent 23.7% 31%,
            var(--foreground) 31% 31.7%,
            transparent 31.7% 48%,
            var(--foreground) 48% 48.7%,
            transparent 48.7% 100%);
}

.project-card--pulse .project-field::before {
    content: "＋ ";
    color: var(--accent);
}


/* ---------------------------------------------------------
   PR—003: SongToSpot
   Sound wave / vinyl groove system
   --------------------------------------------------------- */

.project-card--sound::after {
    border: 1px solid var(--foreground);
    border-radius: 50%;

    background:
        repeating-radial-gradient(circle at center,
            transparent 0 17px,
            var(--foreground) 18px 19px,
            transparent 20px 34px);
}

.project-card--sound .project-field::before {
    content: "◉ ";
    color: var(--accent);
}


/* ---------------------------------------------------------
   PR—004: Narrative Velocity
   Connected intelligence network
   --------------------------------------------------------- */

.project-card--network::after {
    background:
        radial-gradient(circle at 15% 72%,
            var(--foreground) 0 5px,
            transparent 6px),
        radial-gradient(circle at 38% 35%,
            var(--foreground) 0 4px,
            transparent 5px),
        radial-gradient(circle at 67% 64%,
            var(--foreground) 0 6px,
            transparent 7px),
        radial-gradient(circle at 84% 23%,
            var(--foreground) 0 4px,
            transparent 5px),
        linear-gradient(57deg,
            transparent 23%,
            var(--foreground) 23.3% 23.8%,
            transparent 24.1%),
        linear-gradient(126deg,
            transparent 43%,
            var(--foreground) 43.3% 43.8%,
            transparent 44.1%),
        linear-gradient(28deg,
            transparent 60%,
            var(--foreground) 60.3% 60.8%,
            transparent 61.1%);
}

.project-card--network .project-field::before {
    content: "⬢ ";
    color: var(--accent);
}


/* =========================================================
   CARD REGISTRATION MARKS
   ========================================================= */

.project-number {
    position: relative;
    padding-left: 21px;
}

.project-number::before {
    position: absolute;
    top: 50%;
    left: 0;
    width: 10px;
    height: 10px;
    border: 1px solid var(--foreground);
    content: "";
    transform: translateY(-50%);
}


/* Different small line accents for each card */

.project-card--baseball .project-number::after,
.project-card--pulse .project-number::after,
.project-card--sound .project-number::after,
.project-card--network .project-number::after {
    position: absolute;
    top: calc(100% + 15px);
    left: 0;
    width: 72px;
    height: 2px;
    content: "";
}

.project-card--baseball .project-number::after {
    background:
        linear-gradient(90deg,
            var(--accent) 0 65%,
            transparent 65%);
}

.project-card--pulse .project-number::after {
    background:
        linear-gradient(90deg,
            #ff7657 0 48%,
            transparent 48%);
}

.project-card--sound .project-number::after {
    background:
        linear-gradient(90deg,
            #7198ff 0 58%,
            transparent 58%);
}

.project-card--network .project-number::after {
    background:
        linear-gradient(90deg,
            var(--foreground) 0 32%,
            var(--accent) 32% 68%,
            transparent 68%);
}


/* =========================================================
   META DATA DETAIL
   ========================================================= */

.project-meta {
    position: relative;
}

.project-meta::before {
    position: absolute;
    top: -1px;
    left: 0;
    width: 42px;
    height: 3px;
    background: var(--accent);
    content: "";
}


/* =========================================================
   SUBTLE DATA REVEAL ON HOVER
   ========================================================= */

.project-card__body::after {
    display: block;
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    color: rgba(16, 16, 16, 0.26);
    content: "01001000 01010101 01001101 01000001 01001110";
    font-family:
        "SFMono-Regular",
        Consolas,
        "Liberation Mono",
        monospace;
    font-size: 0.59rem;
    letter-spacing: 0.16em;
    opacity: 0;
    transition:
        max-height 260ms ease,
        margin-top 260ms ease,
        opacity 260ms ease;
}

.project-card:hover .project-card__body::after {
    max-height: 30px;
    margin-top: 26px;
    opacity: 1;
}


/* =========================================================
   MOBILE REFINEMENTS
   ========================================================= */

@media (max-width: 960px) {
    .research::before {
        right: -360px;
    }

    .project-card::after {
        width: 260px;
        height: 260px;
    }

    .project-card--pulse::after {
        width: 300px;
        height: 170px;
    }
}

@media (max-width: 620px) {
    .research {
        background-size:
            42px 42px,
            42px 42px;
    }

    .research::after {
        left: 22px;
        width: 185px;
    }

    .project-card::after {
        right: -90px;
        bottom: -65px;
        opacity: 0.05;
    }

    .project-card:hover::after {
        opacity: 0.08;
        transform: none;
    }

    .project-card__body::after {
        display: none;
    }
}