:root {
    --bg: #050505;
    --panel: #0e0e0e;
    --line: #2a2a2a;
    --paper: #f3f0e8;
    --ink: #0b0b0b;
    --muted: #8d8a82;
    --acid: #dfff45;
    --red: #ff4b36;
    --blue: #2d55ff;
    --mono: 'Space Mono', ui-monospace, 'SF Mono', Menlo, monospace;
    --sans: 'Manrope', 'Inter', system-ui, -apple-system, sans-serif;
    color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--bg); }
body {
    min-height: 100vh;
    background: var(--bg);
    color: var(--paper);
    font-family: var(--sans);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { color: inherit; }
::selection { background: var(--acid); color: var(--ink); }
:focus-visible { outline: 3px solid var(--acid); outline-offset: 3px; }

/* --- Top bar --- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: calc(0.9rem + env(safe-area-inset-top, 0px)) clamp(1rem, 4vw, 2.5rem) 0.9rem;
    background: rgba(5, 5, 5, 0.82);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    font: 800 1.05rem/1 var(--sans);
    letter-spacing: -0.03em;
}
.logo-mark {
    display: grid;
    place-items: center;
    width: 2.1rem;
    height: 2.1rem;
    background: var(--acid);
    color: var(--ink);
    font: 700 0.8rem/1 var(--mono);
    box-shadow: 3px 3px 0 var(--red);
}
.topbar-status, .topbar-nav a {
    font: 700 0.68rem/1 var(--mono);
    letter-spacing: 0.08em;
    color: var(--muted);
}
.topbar-status { display: inline-flex; align-items: center; gap: 0.5rem; }
.topbar-status i {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--acid);
    box-shadow: 0 0 10px var(--acid);
    animation: blink 1.2s steps(2, end) infinite;
}
.topbar-nav { display: flex; gap: 1.25rem; }
.topbar-nav a { text-decoration: none; }
.topbar-nav a:hover { color: var(--acid); }

.logo-pixel { font: 700 1rem/1 'Silkscreen', var(--mono); letter-spacing: 0.02em; }
.logo-pixel b { margin-left: 0.35em; color: var(--acid); font-weight: 700; }

/* --- Tools hub --- */
.wrap { width: min(1240px, 100%); margin: 0 auto; padding-inline: clamp(1rem, 4vw, 2.5rem); }
.kicker { font: 700 0.72rem/1 var(--mono); letter-spacing: 0.12em; color: var(--acid); }
.tools-hero { padding-block: clamp(3rem, 9vw, 7rem) clamp(2rem, 5vw, 3.5rem); }
.tools-hero h1 {
    margin-top: 1.2rem;
    font: 800 clamp(2.8rem, 9vw, 7.5rem)/1 var(--sans);
    letter-spacing: -0.06em;
}
.hl { color: var(--ink); background: var(--acid); padding: 0 0.12em; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.lede { max-width: 38rem; margin-top: 1.6rem; color: var(--muted); font: 500 clamp(1rem, 1.6vw, 1.15rem)/1.55 var(--sans); }

.tool-grid {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
    perspective: 1200px;
}
.tool-card {
    --accent: var(--acid);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 17rem;
    padding: 1.5rem;
    border: 2px solid var(--line);
    background: var(--panel);
    text-decoration: none;
    overflow: hidden;
    transform: rotateX(var(--rx, 0)) rotateY(var(--ry, 0));
    transition: transform 0.2s ease, border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.tool-card[data-accent="red"] { --accent: var(--red); }
.tool-card[data-accent="blue"] { --accent: var(--blue); }
.tool-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%);
    opacity: 0;
    transition: opacity 0.25s;
    pointer-events: none;
}
.tool-card:hover, .tool-card:focus-visible {
    border-color: var(--accent);
    box-shadow: 8px 8px 0 var(--accent);
}
.tool-card:hover::before { opacity: 1; }
.tool-card:active { transform: translate(4px, 4px); box-shadow: 2px 2px 0 var(--accent); }
.tool-idx { font: 700 0.72rem/1 var(--mono); color: var(--muted); letter-spacing: 0.1em; }
.tool-glyph { position: absolute; top: 1.1rem; right: 1.2rem; font-size: 2.4rem; filter: grayscale(1) contrast(1.2); transition: filter 0.2s, transform 0.2s; }
.tool-card:hover .tool-glyph { filter: none; transform: rotate(-8deg) scale(1.12); }
.tool-card h2 { margin-top: auto; padding-top: 3rem; font: 800 clamp(1.7rem, 3vw, 2.2rem)/0.95 var(--sans); letter-spacing: -0.045em; }
.tool-card p { margin-top: 0.8rem; color: var(--muted); font: 500 0.95rem/1.5 var(--sans); }
.tool-go {
    align-self: flex-start;
    margin-top: 1.3rem;
    padding: 0.55rem 0.75rem;
    background: var(--accent);
    color: var(--ink);
    font: 700 0.72rem/1 var(--mono);
    letter-spacing: 0.08em;
}
.tool-card[data-accent="blue"] .tool-go { color: #fff; }

.howto {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
    gap: 1px;
    margin-block: clamp(3rem, 7vw, 5rem);
    border: 1px solid var(--line);
    background: var(--line);
}
.howto div { display: flex; gap: 1rem; padding: 1.25rem; background: var(--bg); }
.howto b { font: 700 0.8rem/1.4 var(--mono); color: var(--acid); }
.howto span { color: var(--muted); font: 500 0.92rem/1.45 var(--sans); }

.foot {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1.5rem clamp(1rem, 4vw, 2.5rem) calc(1.5rem + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--line);
    color: var(--muted);
    font: 400 0.72rem/1.4 var(--mono);
}

/* --- 404 --- */
.lost { min-height: 100vh; display: grid; place-content: center; gap: 1.5rem; padding: 2rem 1rem; text-align: center; }
.lost h1 { font: 800 clamp(5rem, 22vw, 14rem)/0.8 var(--sans); letter-spacing: -0.08em; color: var(--acid); }
.lost p { color: var(--muted); font: 400 0.85rem/1.5 var(--mono); }
.lost a { justify-self: center; padding: 0.8rem 1.1rem; background: var(--paper); color: var(--ink); font: 700 0.75rem/1 var(--mono); text-decoration: none; box-shadow: 5px 5px 0 var(--red); }

@keyframes blink { 50% { opacity: 0.2; } }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
}