:root{
    --crt-ink:var(--ink);
    --crt-ink-soft:var(--ink-soft);
    --crt-pencil:var(--pencil);

    --crt-line:rgba(24,33,58,.12);
    --crt-purple:#6d63b8;
    --crt-purple-soft:rgba(109,99,184,.12);

    --crt-card:rgba(255,255,255,.28);
    --crt-card-strong:rgba(255,255,255,.45);

    --crt-shadow:0 24px 70px rgba(24,33,58,.08);
}

/*---------------- HERO ----------------*/

.crt-page{
    padding:70px 0 120px;
}

.crt-hero{
    position:relative;
    min-height:560px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    padding:70px 0 90px;
}

.crt-hero::after{
    content:"CRT";
    position:absolute;
    right:0;
    top:50%;
    transform:translateY(-50%) rotate(-8deg);

    font-family:"Inter","Helvetica Neue",Arial,sans-serif;
    font-size:clamp(140px,26vw,380px);
    font-weight:900;
    letter-spacing:-.08em;

    color:rgba(24,33,58,.04);

    pointer-events:none;
    -webkit-user-select:none;
user-select:none;
}

.crt-kicker,
.card-label{
    color:var(--crt-pencil);

    font-size:12px;
    font-weight:800;
    letter-spacing:.22em;
    text-transform:uppercase;
}

.crt-hero h1{
    position:relative;

    max-width:850px;
    margin:16px 0 24px;

    color:var(--crt-ink);

    font-size:clamp(60px,8vw,110px);
    line-height:.88;
    letter-spacing:-.07em;
}

.crt-subtitle{
    position:relative;

    max-width:700px;

    color:var(--crt-ink-soft);

    font-size:clamp(20px,2vw,30px);
    line-height:1.35;
}

.crt-actions{
    display:flex;
    flex-wrap:wrap;
    gap:14px;
    margin-top:40px;
}

.crt-button{
    display:inline-flex;
    align-items:center;
    justify-content:center;

    height:48px;
    padding:0 22px;

    border-radius:999px;
    border:1px solid rgba(24,33,58,.18);

    background:rgba(255,255,255,.22);

    color:var(--crt-ink);

    font-size:12px;
    font-weight:800;
    letter-spacing:.15em;
    text-transform:uppercase;

    text-decoration:none;

    transition:.25s;
}

.crt-button:hover{
    transform:translateY(-2px);

    background:rgba(255,255,255,.42);
}

.crt-button.primary{
    background:var(--ink);
    color:white;
    border-color:var(--ink);
}

/*---------------- LAYOUT ----------------*/

.crt-grid{
    display:grid;
    grid-template-columns:280px 1fr;
    gap:40px;
    align-items:start;
}

.crt-sidebar{
    position:sticky;
    top:24px;

    display:grid;
    gap:18px;
}

.crt-content{
    display:grid;
    gap:28px;
}

/*---------------- CARDS ----------------*/

.crt-card{
    padding:22px;

    border-radius:24px;
    border:1px solid var(--crt-line);

    background:var(--crt-card);

     -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);

    box-shadow:var(--crt-shadow);
}

.status-card{
    background:
        linear-gradient(
            135deg,
            rgba(109,99,184,.12),
            rgba(255,255,255,.3)
        );
}

.crt-card strong{
    display:block;
    margin-top:8px;

    color:var(--crt-ink);

    font-size:20px;
}

.crt-card p{
    margin-top:10px;

    color:var(--crt-ink-soft);

    font-size:15px;
    line-height:1.6;
}

/*---------------- MINI TOC ----------------*/

.mini-toc{
    display:flex;
    flex-direction:column;
    gap:10px;
}

.mini-toc a{
    color:var(--crt-ink-soft);

    text-decoration:none;

    transition:.2s;
}

.mini-toc a:hover{
    color:var(--crt-ink);
}

/*---------------- CONTENT ----------------*/

.crt-section{
    position:relative;

    padding:42px;

    border-radius:32px;
    border:1px solid var(--crt-line);

    background:var(--crt-card-strong);

    box-shadow:var(--crt-shadow);

    scroll-margin-top:40px;
}

.crt-section::before{
    content:"";

    position:absolute;
    inset:14px;

    border:1px dashed rgba(24,33,58,.10);
    border-radius:20px;

    pointer-events:none;
}

.section-number{
    position:relative;

    color:var(--crt-purple);

    font-size:12px;
    font-weight:800;
    letter-spacing:.2em;
    text-transform:uppercase;
}

.crt-section h2{
    position:relative;

    margin:10px 0 20px;

    color:var(--crt-ink);

    font-size:clamp(34px,4vw,60px);
    line-height:.95;
    letter-spacing:-.05em;
}

.crt-section p{
    position:relative;

    max-width:760px;

    color:var(--crt-ink-soft);

    font-size:18px;
    line-height:1.75;
}

.crt-section p + p{
    margin-top:18px;
}

/*---------------- CONTENTS ----------------*/

.contents-list{
    display:grid;
    gap:16px;
}

.contents-list details{
    overflow:hidden;

    border-radius:22px;
    border:1px solid var(--crt-line);

    background:rgba(255,255,255,.25);
}

.contents-list summary{
    display:flex;
    align-items:center;
    gap:14px;

    padding:18px 20px;

    cursor:pointer;

    list-style:none;

    font-weight:800;
    letter-spacing:.08em;
    text-transform:uppercase;
}

.contents-list summary::-webkit-details-marker{
    display:none;
}

.contents-list summary span{
    display:grid;
    place-items:center;

    width:30px;
    height:30px;

    border-radius:50%;

    background:var(--ink);
    color:white;

    font-size:12px;
}

.contents-list a{
    display:flex;
    gap:12px;

    padding:14px 22px 14px 64px;

    border-top:1px solid var(--crt-line);

    color:var(--crt-ink-soft);

    text-decoration:none;

    transition:.2s;
}

.contents-list a:hover{
    background:rgba(109,99,184,.06);

    color:var(--crt-ink);
}

.contents-list strong{
    color:var(--crt-purple);
}

/*---------------- REQUIREMENTS ----------------*/

.requirement-list{
    display:grid;
    gap:16px;

    margin-top:26px;

    list-style:none;
}

.requirement-list li{
    padding:20px;

    border-radius:20px;
    border:1px solid var(--crt-line);

    background:rgba(255,255,255,.22);

    line-height:1.7;
}

.requirement-list strong{
    color:var(--crt-ink);
}

/*---------------- SCORE ----------------*/

.score-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:14px;

    margin-top:28px;
}

.score-grid div{
    padding:18px;

    border-radius:20px;
    border:1px solid var(--crt-line);

    background:rgba(255,255,255,.25);

    min-height:110px;

    display:flex;
    flex-direction:column;
    justify-content:space-between;
}

.score-grid span{
    color:var(--crt-pencil);

    font-size:11px;
    font-weight:800;
    letter-spacing:.15em;
    text-transform:uppercase;
}

.score-grid strong{
    font-size:42px;
}

/*---------------- CODE ----------------*/

/*---------------- CODE ----------------*/

.lambda-block{
    max-width:760px;

    margin:24px 0;

    padding:22px 24px;

    border-radius:22px;

    background:rgba(24,33,58,.92);

    overflow:auto;
}

.lambda-block + p{
    margin-top:22px;
}

.lambda-block code{
    display:block;

    color:white;

    font-family:"Courier New", monospace;
    font-size:14px;
    line-height:1.75;

    white-space:pre-wrap;
}

/*---------------- CALLOUT ----------------*/

.principle-box{
    margin-top:30px;

    padding:24px;

    border-radius:24px;

    background:var(--crt-purple-soft);

    border:1px solid rgba(109,99,184,.22);
}

.principle-box + p{
    margin-top:28px;
}

.principle-box strong{
    display:block;

    margin-bottom:10px;

    color:var(--crt-purple);

    letter-spacing:.18em;
    text-transform:uppercase;

    font-size:12px;
}

.principle-box p{
    margin:0;
}

/*---------------- NOTES ----------------*/

.note-list{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:16px;

    margin-top:24px;
}

.note-list article{
    padding:22px;

    border-radius:22px;

    border:1px solid var(--crt-line);

    background:rgba(255,255,255,.25);
}

.note-list span{
    color:var(--crt-purple);

    font-size:11px;
    font-weight:800;
    letter-spacing:.16em;
    text-transform:uppercase;
}

.note-list h3{
    margin:12px 0;

    font-size:22px;
    line-height:1.1;
}

.note-list p{
    font-size:15px;
    line-height:1.6;
}

/*---------------- PAPER ----------------*/

.paper-link{
    display:flex;
    align-items:center;
    gap:18px;

    margin-top:26px;
    padding:22px;

    border-radius:22px;

    border:1px solid var(--crt-line);

    background:rgba(255,255,255,.26);

    text-decoration:none;
    color:inherit;

    transition:.2s;
}

.paper-link:hover{
    background:rgba(255,255,255,.42);
}

.paper-link span{
    display:grid;
    place-items:center;

    width:54px;
    height:54px;

    border-radius:16px;

    background:var(--ink);

    color:white;

    font-size:12px;
    font-weight:800;
    letter-spacing:.12em;
}


/*---------------- MOBILE ----------------*/

@media(max-width:1050px){

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

    .crt-sidebar{
        position:relative;
        top:auto;

        grid-template-columns:repeat(2,1fr);
    }

    .mini-toc{
        grid-column:1/-1;
    }

    .score-grid,
    .note-list{
        grid-template-columns:repeat(2,1fr);
    }

}

@media(max-width:700px){

    .crt-page{
        padding:40px 0 80px;
    }

    .crt-hero{
    min-height:0;
    padding:40px 0 60px;
}

    .crt-actions{
        flex-direction:column;
    }

    .crt-button{
        width:100%;
    }

    .crt-sidebar,
    .score-grid,
    .note-list{
        grid-template-columns:1fr;
    }

    .crt-section{
        padding:28px 22px;
    }

    .crt-section::before{
        inset:10px;
    }

    .crt-section h2{
        font-size:36px;
    }

    .crt-section p{
        font-size:16px;
    }

    .contents-list a{
        padding-left:22px;
    }

}