:root{
    --bg-0:#070A12;
    --bg-1:#0B1022;
    --card:rgba(255,255,255,.06);
    --card2:rgba(255,255,255,.09);
    --text:rgba(255,255,255,.92);
    --muted:rgba(255,255,255,.72);
    --line:rgba(255,255,255,.12);
    --a:#7CF7D4;
    --b:#A78BFA;
    --c:#60A5FA;
    --shadow: 0 20px 60px rgba(0,0,0,.55);
    --radius: 22px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
    margin:0;
    color:var(--text);
    font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
    background:
    radial-gradient(1200px 700px at 20% 10%, rgba(167,139,250,.22), transparent 60%),
    radial-gradient(900px 700px at 80% 20%, rgba(124,247,212,.18), transparent 55%),
    radial-gradient(1000px 800px at 55% 90%, rgba(96,165,250,.14), transparent 60%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1));
    overflow-x:hidden;
}

/* Header (keeps your structure intact; only styles it) */
header{
    position:sticky;
    top:0;
    z-index:20;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(10, 14, 28, .55);
    border-bottom: 1px solid rgba(255,255,255,.10);
}
header nav{
    max-width: 1100px;
    margin: 0 auto;
    padding: 14px 18px;
    display:flex;
    align-items:center;
    gap: 14px;
}
header nav a{
    text-decoration:none;
    color: var(--text);
    font-weight: 600;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,.10);
    background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
    box-shadow: 0 8px 22px rgba(0,0,0,.25);
    transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
header nav a:hover{
    transform: translateY(-1px);
    border-color: rgba(124,247,212,.35);
    background: linear-gradient(180deg, rgba(124,247,212,.12), rgba(255,255,255,.04));
}

/* Ambient CSS figures (no images) */
.scene{
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    overflow:hidden;
}

/* soft grid */
.grid{
    position:absolute;
    inset:-20%;
    background:
    linear-gradient(to right, rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 72px 72px;
    transform: rotate(-10deg);
    opacity:.18;
    mask-image: radial-gradient(circle at 50% 35%, black 10%, transparent 70%);
    -webkit-mask-image: radial-gradient(circle at 50% 35%, black 10%, transparent 70%);
    animation: drift 18s linear infinite;
}
@keyframes drift{
    0%{ transform: translate3d(0,0,0) rotate(-10deg); }
    100%{ transform: translate3d(-120px, 80px, 0) rotate(-10deg); }
}

/* floating orbs */
.orb{
    position:absolute;
    width: min(42vw, 520px);
    aspect-ratio: 1/1;
    border-radius: 999px;
    filter: blur(22px);
    opacity:.22;
    mix-blend-mode: screen;
    background: radial-gradient(circle at 30% 30%, rgba(124,247,212,.9), transparent 55%),
                radial-gradient(circle at 70% 70%, rgba(167,139,250,.9), transparent 55%);
    animation: float 12s ease-in-out infinite;
}
.orb.o1{ top:-10%; left:-6%; animation-duration: 14s; }
.orb.o2{
    top: 10%;
    right:-8%;
    width:min(38vw, 460px);
    opacity:.18;
    background: radial-gradient(circle at 35% 35%, rgba(96,165,250,.95), transparent 58%),
                radial-gradient(circle at 70% 70%, rgba(124,247,212,.75), transparent 58%);
    animation-duration: 16s;
}
.orb.o3{
    bottom:-12%;
    left: 22%;
    width:min(46vw, 560px);
    opacity:.16;
    background: radial-gradient(circle at 35% 35%, rgba(167,139,250,.95), transparent 58%),
                radial-gradient(circle at 70% 70%, rgba(96,165,250,.75), transparent 58%);
    animation-duration: 18s;
}
@keyframes float{
    0%,100%{ transform: translate3d(0,0,0) scale(1); }
    50%{ transform: translate3d(22px,-18px,0) scale(1.04); }
}

/* particles */
.spark{
    position:absolute;
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(255,255,255,.95), rgba(255,255,255,.0) 70%);
    opacity:.45;
    filter: blur(.2px);
    animation: twinkle 2.8s ease-in-out infinite;
}
@keyframes twinkle{
    0%,100%{ transform: scale(.75); opacity:.25; }
    50%{ transform: scale(1.25); opacity:.70; }
}

/* Main content layout */
main{
    position:relative;
    z-index:1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 38px 18px 70px;
}

.hero{
    display:grid;
    grid-template-columns: 1.25fr .75fr;
    gap: 18px;
    align-items: start;
}
@media (max-width: 900px){
    .hero{ grid-template-columns: 1fr; }
}

.card{
    border-radius: var(--radius);
    background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.05));
    border: 1px solid rgba(255,255,255,.12);
    box-shadow: var(--shadow);
    overflow:hidden;
    position:relative;
}
.card::before{
    content:"";
    position:absolute;
    inset:-2px;
    background: radial-gradient(900px 180px at 10% 0%, rgba(124,247,212,.18), transparent 60%),
                radial-gradient(700px 200px at 80% 20%, rgba(167,139,250,.16), transparent 60%),
                radial-gradient(600px 200px at 60% 90%, rgba(96,165,250,.12), transparent 60%);
    opacity:.9;
    pointer-events:none;
}
.card > *{ position:relative; }

.content{
    padding: 26px 24px 24px;
}

.kicker{
    display:inline-flex;
    gap:10px;
    align-items:center;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.14);
    background: rgba(0,0,0,.18);
    color: var(--muted);
    letter-spacing:.2px;
    font-size: 13px;
    margin-bottom: 14px;
}
.dot{
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: conic-gradient(from 90deg, var(--a), var(--b), var(--c), var(--a));
    box-shadow: 0 0 18px rgba(124,247,212,.35);
}

/* Text preservation: keep exactly as given, including line breaks */
.provided{
    white-space: pre-wrap; /* preserves newlines */
    margin:0;
    font-size: 16px;
    color: rgba(255,255,255,.90);
}

/* Sidebar decorative "figures" */
.side{
    padding: 18px;
    display:flex;
    flex-direction:column;
    gap: 14px;
}

.mini{
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,.12);
    background: linear-gradient(180deg, rgba(0,0,0,.18), rgba(255,255,255,.04));
    padding: 14px 14px 12px;
    position:relative;
    overflow:hidden;
}
.mini h3{
    margin:0 0 10px;
    font-size: 13px;
    color: rgba(255,255,255,.80);
    letter-spacing:.35px;
    text-transform: uppercase;
}

/* Figure 1: language rings */
.rings{
    height: 150px;
    display:grid;
    place-items:center;
    position:relative;
}
.ring{
    position:absolute;
    width: 120px;
    height: 120px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.22);
    box-shadow: inset 0 0 28px rgba(124,247,212,.10);
    background:
    radial-gradient(circle at 30% 30%, rgba(124,247,212,.10), transparent 55%),
    radial-gradient(circle at 70% 70%, rgba(167,139,250,.10), transparent 55%);
    animation: spin 10s linear infinite;
}
.ring.r2{
    width: 92px;
    height: 92px;
    border-color: rgba(255,255,255,.18);
    animation-direction: reverse;
    animation-duration: 8s;
    box-shadow: inset 0 0 22px rgba(167,139,250,.10);
}
.ring.r3{
    width: 62px;
    height: 62px;
    border-color: rgba(255,255,255,.14);
    animation-duration: 6s;
    box-shadow: inset 0 0 18px rgba(96,165,250,.10);
}
@keyframes spin{
    from{ transform: rotate(0deg); }
    to{ transform: rotate(360deg); }
}
.glyphs{
    position:absolute;
    inset:0;
    display:grid;
    place-items:center;
    font-weight: 700;
    letter-spacing: .8px;
    color: rgba(255,255,255,.82);
    text-shadow: 0 0 22px rgba(124,247,212,.18);
    user-select:none;
}
.glyphs span{
    display:inline-block;
    padding: 8px 12px;
    border-radius: 12px;
    background: rgba(0,0,0,.20);
    border: 1px solid rgba(255,255,255,.12);
    font-size: 12px;
}

/* Figure 2: "grammar scan" bar */
.scan{
    height: 120px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,.12);
    background:
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(0,0,0,.18));
    position:relative;
    overflow:hidden;
}
.scan::before{
    content:"";
    position:absolute;
    inset:-40%;
    background:
    repeating-linear-gradient(
        90deg,
        rgba(255,255,255,.0) 0px,
        rgba(255,255,255,.0) 18px,
        rgba(255,255,255,.10) 19px,
        rgba(255,255,255,.0) 20px
    );
    transform: rotate(18deg);
    opacity:.45;
}
.beam{
    position:absolute;
    top:-20%;
    left:-30%;
    width: 60%;
    height: 160%;
    background: linear-gradient(90deg, transparent, rgba(124,247,212,.25), rgba(167,139,250,.18), transparent);
    filter: blur(6px);
    transform: skewX(-18deg);
    animation: sweep 3.8s ease-in-out infinite;
}
@keyframes sweep{
    0%{ transform: translateX(-40%) skewX(-18deg); opacity:.25; }
    50%{ transform: translateX(120%) skewX(-18deg); opacity:.55; }
    100%{ transform: translateX(220%) skewX(-18deg); opacity:.20; }
}
.ticks{
    position:absolute;
    inset: 14px;
    display:flex;
    flex-direction:column;
    gap: 10px;
}
.tick{
    height: 10px;
    border-radius: 999px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.10);
    position:relative;
    overflow:hidden;
}
.tick::after{
    content:"";
    position:absolute;
    inset:0;
    width: var(--w, 62%);
    background: linear-gradient(90deg, rgba(96,165,250,.22), rgba(124,247,212,.22), rgba(167,139,250,.18));
    border-right: 1px solid rgba(255,255,255,.20);
    opacity:.9;
}

/* Footer line */
.footer{
    margin-top: 18px;
    padding: 14px 18px;
    color: rgba(255,255,255,.62);
    font-size: 12.5px;
    border-top: 1px solid rgba(255,255,255,.10);
}

/* Motion accessibility */
@media (prefers-reduced-motion: reduce){
    .grid, .orb, .ring, .beam{ animation: none !important; }
}