:root {
    --bg: #07020d;
    --bg-2: #0c0417;
    --fg: #f4eaff;
    --fg-dim: #c9b6e0;
    --muted: #8b7ba0;
    --muted-2: #4a3859;
    --line: rgba(176,38,255,0.12);
    --line-2: rgba(176,38,255,0.3);
    --line-3: rgba(176,38,255,0.55);
    --violet: #b026ff;
    --violet-deep: #7d10d4;
    --magenta: #ff2ec4;
    --lilac: #e0a3ff;
    --yellow: #fbbf24;
    --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
    --serif: 'Instrument Serif', 'Times New Roman', serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--mono);
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    font-size: 14px;
}

/* ============ AMBIENT ============ */
.bg-grid {
    position: fixed; inset: 0; z-index: -2;
    background-image:
            linear-gradient(rgba(176,38,255,0.055) 1px, transparent 1px),
            linear-gradient(90deg, rgba(176,38,255,0.055) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 85%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 85%);
    pointer-events: none;
}
.bg-glow { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.bg-glow::before, .bg-glow::after {
    content: ''; position: absolute; width: 800px; height: 800px;
    border-radius: 50%; filter: blur(140px);
}
.bg-glow::before {
    background: radial-gradient(circle, var(--violet), transparent 65%);
    opacity: 0.22; top: -300px; left: 50%; transform: translateX(-50%);
}
.bg-glow::after {
    background: radial-gradient(circle, var(--magenta), transparent 65%);
    opacity: 0.12; bottom: 10%; right: -200px;
}
.bg-noise {
    position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='2' /%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

.symbol {
    position: fixed; font-family: var(--serif); font-style: italic;
    color: var(--violet); opacity: 0.06; pointer-events: none; z-index: -1;
    user-select: none; animation: float 18s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(6deg); }
}
.symbol.s1 { top: 12%; left: 3%; font-size: 120px; animation-delay: 0s; }
.symbol.s2 { top: 45%; right: 4%; font-size: 90px; animation-delay: -4s; }
.symbol.s3 { bottom: 15%; left: 8%; font-size: 140px; animation-delay: -8s; }
.symbol.s4 { top: 70%; right: 10%; font-size: 70px; animation-delay: -12s; }

/* ============ LAYOUT ============ */
.wrap {
    max-width: 1280px; margin: 0 auto; padding: 0 32px;
    position: relative; z-index: 1;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ============ NAV ============ */
header.top {
    position: sticky; top: 0; z-index: 100; padding: 14px 0;
    background: rgba(7,2,13,0.75);
    backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.nav { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; letter-spacing: -0.01em; font-size: 14px; }
.brand img {
    width: 34px; height: 34px; border-radius: 8px;
    border: 1px solid var(--line-2); object-fit: cover;
    box-shadow: 0 0 20px rgba(176,38,255,0.3);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text .main { font-weight: 600; font-size: 14px; letter-spacing: -0.02em; }
.brand-text .sub { font-size: 9px; color: var(--muted); letter-spacing: 0.2em; text-transform: uppercase; }

.nav-links {
    display: flex; gap: 28px; align-items: center;
    font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em;
}
.nav-links > a { color: var(--muted); transition: color 0.2s; position: relative; }
.nav-links > a::before { content: attr(data-idx); color: var(--muted-2); margin-right: 6px; }
.nav-links > a:hover { color: var(--lilac); }

.lang {
    display: flex; border: 1px solid var(--line-2); border-radius: 6px;
    overflow: hidden; font-size: 10px; letter-spacing: 0.1em;
}
.lang button {
    background: transparent; border: none; color: var(--muted);
    padding: 6px 10px; cursor: pointer; font-family: inherit; font-weight: 500;
    transition: all 0.2s; border-right: 1px solid var(--line-2);
}
.lang button:last-child { border-right: none; }
.lang button.active { background: var(--violet); color: #fff; text-shadow: 0 0 8px rgba(255,255,255,0.6); }
.lang button:hover:not(.active) { color: var(--fg); background: rgba(176,38,255,0.08); }

/* ============ HERO ============ */
.hero { padding: 80px 0 60px; position: relative; }

.hero-meta {
    display: flex; gap: 20px; align-items: center;
    font-size: 11px; color: var(--muted); letter-spacing: 0.18em;
    text-transform: uppercase; margin-bottom: 36px; flex-wrap: wrap;
}
.hero-meta .dot {
    width: 6px; height: 6px; background: var(--violet); border-radius: 50%;
    box-shadow: 0 0 12px var(--violet); animation: blink 2s infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero-meta .sep { color: var(--muted-2); }

.hero-grid {
    display: grid; grid-template-columns: 1.15fr 1fr;
    gap: 64px; align-items: start;
}

h1.display {
    font-family: var(--serif); font-weight: 400;
    font-size: clamp(64px, 11vw, 148px); line-height: 0.9;
    letter-spacing: -0.045em; color: var(--fg); margin-bottom: 32px;
}
h1.display em {
    font-style: italic; color: var(--violet);
    position: relative; display: inline-block; padding-right: 0.08em;
}
h1.display em::after {
    content: ''; position: absolute; left: 0; right: -0.08em; bottom: 0.08em;
    height: 3px; background: linear-gradient(90deg, var(--violet), var(--magenta));
    box-shadow: 0 0 20px var(--violet); border-radius: 2px;
}

.hero-sub {
    font-size: 15px; color: var(--fg-dim); line-height: 1.7;
    max-width: 460px; margin-bottom: 36px;
}
.hero-sub strong { color: var(--lilac); font-weight: 500; }
.hero-sub code {
    background: rgba(176,38,255,0.1); border: 1px solid var(--line-2);
    padding: 1px 6px; border-radius: 4px; color: var(--lilac); font-size: 13px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 12px 20px; font-family: var(--mono); font-size: 12px;
    font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase;
    border-radius: 6px; border: 1px solid var(--line-2);
    background: transparent; color: var(--fg); cursor: pointer;
    transition: all 0.22s cubic-bezier(0.4,0,0.2,1); position: relative;
}
.btn:hover {
    border-color: var(--line-3); background: rgba(176,38,255,0.08);
    transform: translateY(-1px);
}
.btn.primary {
    background: var(--violet); border-color: var(--violet); color: #fff;
    box-shadow: 0 0 30px rgba(176,38,255,0.4);
}
.btn.primary:hover {
    background: var(--magenta); border-color: var(--magenta);
    box-shadow: 0 0 40px rgba(255,46,196,0.55);
}
.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ============ SOLVER BOX ============ */
.solver {
    border: 1px solid var(--line-2);
    background: linear-gradient(180deg, rgba(176,38,255,0.04), rgba(176,38,255,0.01));
    border-radius: 10px; overflow: hidden; position: relative;
    box-shadow: 0 0 80px rgba(176,38,255,0.15), inset 0 1px 0 rgba(255,255,255,0.03);
}
.solver::before, .solver::after {
    content: ''; position: absolute; width: 14px; height: 14px;
    border: 1px solid var(--lilac); pointer-events: none;
}
.solver::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.solver::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.solver-head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-bottom: 1px solid var(--line);
    background: rgba(0,0,0,0.3); gap: 12px;
}
.solver-head .label {
    font-size: 10px; letter-spacing: 0.2em;
    text-transform: uppercase; color: var(--muted);
}

.model-status {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
    padding: 3px 8px; border-radius: 999px; border: 1px solid transparent;
    transition: all 0.3s; white-space: nowrap;
}
.model-status .ms-dot {
    width: 6px; height: 6px; border-radius: 50%; background: currentColor;
    box-shadow: 0 0 8px currentColor;
}
.model-status.loading { color: var(--yellow); border-color: rgba(251,191,36,0.3); background: rgba(251,191,36,0.06); }
.model-status.loading .ms-dot { animation: blink 0.9s infinite; }
.model-status.ready { color: var(--lilac); border-color: var(--line-3); background: rgba(176,38,255,0.08); }
.model-status.ready .ms-dot { animation: blink 2s infinite; }
.model-status.fallback { color: var(--muted); border-color: var(--line-2); background: rgba(0,0,0,0.3); }

.solver-body { padding: 24px; }

.solver-prompt {
    display: flex; align-items: center; gap: 12px;
    font-size: 22px; font-family: var(--mono); margin-bottom: 20px;
}
.solver-prompt .cursor-mark {
    color: var(--magenta); font-weight: 700; text-shadow: 0 0 12px var(--magenta);
}
.solver-prompt input {
    flex: 1; background: transparent; border: none;
    border-bottom: 1px dashed var(--line-2); color: var(--lilac);
    font-family: var(--mono); font-size: 22px; padding: 8px 0;
    outline: none; transition: border-color 0.2s; min-width: 0;
}
.solver-prompt input:focus { border-bottom-color: var(--magenta); border-bottom-style: solid; }
.solver-prompt input::placeholder { color: var(--muted-2); }

.solver-controls { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }

.btn-mini {
    font-family: var(--mono); font-size: 10px; letter-spacing: 0.15em;
    text-transform: uppercase; padding: 6px 12px; border-radius: 4px;
    border: 1px solid var(--line-2); background: transparent;
    color: var(--muted); cursor: pointer; transition: all 0.18s;
}
.btn-mini:hover {
    color: var(--fg); border-color: var(--line-3); background: rgba(176,38,255,0.08);
}
.btn-mini.go {
    background: var(--magenta); border-color: var(--magenta); color: #fff;
    box-shadow: 0 0 20px rgba(255,46,196,0.5);
}
.btn-mini.go:hover { background: var(--violet); border-color: var(--violet); }

.solver-out {
    border-top: 1px solid var(--line); padding-top: 20px;
    min-height: 80px; font-size: 14px; color: var(--fg-dim); line-height: 1.8;
}
.solver-out .out-line { display: flex; align-items: baseline; gap: 12px; }
.solver-out .out-line .k {
    color: var(--muted); font-size: 11px; letter-spacing: 0.1em;
    text-transform: uppercase; min-width: 60px;
}
.solver-out .out-line .v { color: var(--lilac); font-weight: 500; }
.solver-out .out-line .v.err { color: var(--magenta); }
.solver-out .root { display: block; padding: 2px 0; }
.solver-out .root .idx { color: var(--muted-2); margin-right: 8px; }
.solver-out .root .val { color: var(--lilac); font-weight: 500; }
.solver-out .root.approx .val { color: var(--fg-dim); font-weight: 400; }
.solver-out .result-note {
    font-size: 11px; color: var(--muted); letter-spacing: 0.08em;
    text-transform: uppercase; margin-top: 12px;
}
.solver-out .result-note.approx { color: var(--yellow); }

.solver-foot {
    border-top: 1px solid var(--line); padding: 10px 16px;
    display: flex; justify-content: space-between;
    font-size: 10px; letter-spacing: 0.15em;
    text-transform: uppercase; color: var(--muted-2);
    background: rgba(0,0,0,0.3);
}

/* ============ MARQUEE ============ */
.marquee {
    border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
    padding: 18px 0; overflow: hidden; position: relative;
    margin-top: 60px; background: rgba(176,38,255,0.02);
}
.marquee-track {
    display: flex; gap: 60px; white-space: nowrap;
    animation: marquee 50s linear infinite; width: max-content;
}
.marquee-track span {
    font-family: var(--serif); font-style: italic; font-size: 28px;
    color: var(--muted); letter-spacing: -0.01em;
}
@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ============ SECTIONS ============ */
section { padding: 120px 0; position: relative; }

.sec-head {
    display: grid; grid-template-columns: 200px 1fr;
    gap: 40px; margin-bottom: 60px; align-items: start;
}
.sec-tag {
    font-size: 10px; letter-spacing: 0.25em; text-transform: uppercase;
    color: var(--violet); padding-top: 6px;
}
.sec-tag::before {
    content: ''; display: inline-block; width: 24px; height: 1px;
    background: var(--violet); vertical-align: middle; margin-right: 10px;
    box-shadow: 0 0 8px var(--violet);
}
.sec-title {
    font-family: var(--serif); font-size: clamp(36px, 5vw, 64px);
    line-height: 1.02; letter-spacing: -0.03em; font-weight: 400;
}
.sec-title em { font-style: italic; color: var(--violet); }

/* ============ MODEL BLOCK ============ */
.model-block { position: relative; }
.model-head-row {
    display: flex; justify-content: space-between; align-items: flex-end;
    gap: 20px; margin-bottom: 20px; padding-bottom: 18px;
    border-bottom: 1px solid var(--line-2); flex-wrap: wrap;
}
.model-name-big {
    font-family: var(--mono); font-size: clamp(24px, 4vw, 44px);
    font-weight: 500; letter-spacing: -0.03em; color: var(--fg);
    line-height: 1; word-break: break-all;
}
.model-name-big .slash { color: var(--muted-2); font-weight: 300; }
.model-name-big .accent { color: var(--lilac); }

.status-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 12px; border-radius: 999px;
    font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
    font-weight: 500; white-space: nowrap;
}
.status-badge.live {
    background: rgba(176,38,255,0.1); border: 1px solid var(--line-3); color: var(--lilac);
}
.status-badge.live span:first-child {
    width: 6px; height: 6px; border-radius: 50%; background: var(--lilac);
    box-shadow: 0 0 10px var(--lilac); animation: blink 1.5s infinite;
}
.status-badge.dev {
    background: rgba(255,46,196,0.06); border: 1px solid rgba(255,46,196,0.35);
    color: var(--magenta);
}
.status-badge.dev span:first-child {
    width: 6px; height: 6px; border-radius: 50%; background: var(--magenta);
    box-shadow: 0 0 10px var(--magenta); animation: blink 2.5s infinite;
}

/* ============ SPEC SHEET ============ */
.spec { border-top: 1px solid var(--line-2); }
.spec-row {
    display: grid; grid-template-columns: 260px 1fr;
    border-bottom: 1px solid var(--line); padding: 24px 0;
    transition: background 0.2s; position: relative;
}
.spec-row:hover { background: rgba(176,38,255,0.025); }
.spec-row:hover .spec-key { color: var(--lilac); }
.spec-row:hover .spec-key::before { transform: scaleX(1); }

.spec-key {
    font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase;
    color: var(--muted); transition: color 0.2s; position: relative; padding-left: 20px;
}
.spec-key::before {
    content: ''; position: absolute; left: 0; top: 50%;
    width: 12px; height: 1px; background: var(--violet);
    transform: scaleX(0.4); transform-origin: left;
    transition: transform 0.3s; box-shadow: 0 0 8px var(--violet);
}
.spec-val { font-size: 15px; color: var(--fg-dim); line-height: 1.6; }
.spec-val .hl { color: var(--lilac); }
.spec-val a {
    color: var(--violet); border-bottom: 1px dashed var(--line-2); transition: all 0.2s;
}
.spec-val a:hover { color: var(--magenta); border-bottom-color: var(--magenta); }

/* ============ MODEL DOWNLOADS ============ */
.model-downloads {
    margin-top: 44px; padding-top: 32px;
    border-top: 1px solid var(--line-2);
}
.model-downloads-head {
    font-size: 10px; letter-spacing: 0.25em; text-transform: uppercase;
    color: var(--violet); margin-bottom: 22px;
}
.model-downloads-head::before {
    content: ''; display: inline-block; width: 18px; height: 1px;
    background: var(--violet); vertical-align: middle; margin-right: 10px;
    box-shadow: 0 0 8px var(--violet);
}

/* ============ DOWNLOAD CARDS ============ */
.dl-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px; margin-bottom: 20px;
}
.dl-card {
    border: 1px solid var(--line-2);
    background: linear-gradient(180deg, rgba(176,38,255,0.03), transparent);
    border-radius: 10px; padding: 20px; text-decoration: none;
    color: inherit; position: relative; overflow: hidden;
    transition: all 0.25s; display: block;
}
.dl-card::after {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 100% 0%, rgba(255,46,196,0.15), transparent 60%);
    opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
.dl-card:hover {
    border-color: var(--violet); transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(176,38,255,0.3);
}
.dl-card:hover::after { opacity: 1; }
.dl-card .fmt {
    font-family: var(--mono); font-size: 18px; font-weight: 600;
    color: var(--lilac); letter-spacing: -0.02em; margin-bottom: 8px;
    text-transform: uppercase;
}
.dl-card .desc { font-size: 12px; color: var(--muted); line-height: 1.5; margin-bottom: 16px; }
.dl-card .link {
    font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
    color: var(--violet); display: flex; align-items: center; gap: 8px;
}
.dl-card .link .arrow { transition: transform 0.2s; }
.dl-card:hover .link .arrow { transform: translateX(4px); }
.dl-card:hover .link { color: var(--magenta); }

/* ============ CODE ============ */
.code-block {
    border: 1px solid var(--line-2); background: #05010a;
    border-radius: 10px; overflow: hidden;
}
.code-head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-bottom: 1px solid var(--line);
    background: rgba(176,38,255,0.03);
}
.code-head .lang-label {
    font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted);
}
.code-head .copy {
    font-size: 10px; letter-spacing: 0.15em; text-transform: uppercase;
    color: var(--muted); background: transparent;
    border: 1px solid var(--line); padding: 4px 10px;
    border-radius: 4px; cursor: pointer; transition: all 0.2s;
}
.code-head .copy:hover { color: var(--lilac); border-color: var(--line-2); }
.code-head .copy.ok {
    color: var(--lilac); border-color: var(--violet); background: rgba(176,38,255,0.1);
}
.code-body {
    padding: 20px 22px; font-size: 13px; line-height: 1.8;
    color: var(--fg-dim); overflow-x: auto; white-space: pre;
}
.code-body .cm { color: var(--muted-2); font-style: italic; }
.code-body .fn { color: var(--fg); }
.code-body .st { color: var(--lilac); }

/* ============ NOTE ============ */
.note { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.note-text p {
    font-size: 15px; color: var(--fg-dim); line-height: 1.8;
    margin-bottom: 18px; max-width: 520px;
}
.note-text p strong { color: var(--lilac); font-weight: 500; }
.note-aside {
    border: 1px solid var(--line-2); border-radius: 10px; padding: 24px;
    background: rgba(176,38,255,0.03); font-size: 13px; line-height: 1.8;
    color: var(--fg-dim); position: relative;
}
.note-aside::before {
    content: ''; position: absolute; top: -1px; left: 24px; right: 24px;
    height: 1px; background: linear-gradient(90deg, transparent, var(--violet), transparent);
}
.note-aside .aside-line {
    display: flex; justify-content: space-between; padding: 8px 0;
    border-bottom: 1px solid var(--line); gap: 12px;
}
.note-aside .aside-line:last-child { border-bottom: none; }
.note-aside .aside-line .k {
    color: var(--muted); font-size: 11px; letter-spacing: 0.15em; text-transform: uppercase;
}
.note-aside .aside-line .v { color: var(--lilac); font-family: var(--mono); text-align: right; }

/* ============ STAT GRID ============ */
.stat-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1px; background: var(--line); border: 1px solid var(--line);
    border-radius: 10px; overflow: hidden; margin-top: 60px;
}
.stat-cell { background: var(--bg); padding: 24px 20px; position: relative; }
.stat-cell .k {
    font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
    color: var(--muted); margin-bottom: 10px;
}
.stat-cell .v {
    font-family: var(--mono); font-size: 28px; font-weight: 500;
    color: var(--lilac); letter-spacing: -0.02em; line-height: 1;
}

/* ============ FOOTER ============ */
footer {
    border-top: 1px solid var(--line); padding: 40px 0; margin-top: 60px;
    font-size: 11px; color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase;
}
.foot-inner {
    display: flex; justify-content: space-between; align-items: center;
    gap: 20px; flex-wrap: wrap;
}
.foot-inner a { color: var(--muted); transition: color 0.2s; margin-left: 24px; }
.foot-inner a:hover { color: var(--lilac); }

/* ============ REVEAL ============ */
.rv { opacity: 0; transform: translateY(16px); transition: opacity 0.8s ease, transform 0.8s ease; }
.rv.in { opacity: 1; transform: translateY(0); }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; gap: 48px; }
    .sec-head { grid-template-columns: 1fr; gap: 12px; }
    .note { grid-template-columns: 1fr; gap: 40px; }
    .spec-row { grid-template-columns: 1fr; gap: 10px; }
    section { padding: 80px 0; }
    .nav-links > a { display: none; }
    .wrap { padding: 0 20px; }
    .model-head-row { align-items: flex-start; }
}
@media (max-width: 560px) {
    .solver-prompt { font-size: 16px; }
    .solver-prompt input { font-size: 16px; }
    .symbol { display: none; }
    .marquee-track span { font-size: 20px; }
}