/*
          Futuristic single‑file website
          - Dark (gray/black) default + Light mode toggle
          - Pure HTML/CSS/JS — no deps
        */

:root {
    /* Base — DARK (gray/black) */
    --bg-1: #0b0b0c;          /* page gradient start */
    --bg-2: #121315;          /* page gradient end */
    --bg-radial-1: #15171b;   /* subtle blobs */
    --bg-radial-2: #0c0d11;

    --text:  #e8e9ec;         /* primary text */
    --muted: #a4a8b2;         /* secondary */

    --card: rgba(255,255,255,0.03);
    --glass: rgba(255,255,255,0.06);
    --border: rgba(255,255,255,0.12);
    --grid-line: rgba(255,255,255,0.06);
    --ring: rgba(0,238,255,0.28);

    /* Accents kept cool + subtle */
    --neon-a: #4fd2ff; /* cyan */
    --neon-b: #8c7bff; /* violet */
    --neon-c: #6ef2bc; /* mint  */
}

/* LIGHT THEME OVERRIDES */
[data-theme="light"] {
    --bg-1: #d9dadf;
    --bg-2: #eaeaee;
    --bg-radial-1: #d0d1d6;
    --bg-radial-2: #eaeaee;

    --text: #14151a;
    --muted: #4a4f5a;

    --card: rgba(0,0,0,0.08);
    --glass: rgba(0,0,0,0.06);
    --border: rgba(0,0,0,0.22);
    --grid-line: rgba(0,0,0,0.10);
    --ring: rgba(0,0,0,0.14);

    --neon-a: #177cff;
    --neon-b: #6a58ff;
    --neon-c: #0aa174;
}

/* Utilities */
[hidden] { display: none !important; }

/* Base layout */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0;
    font: 500 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    color: var(--text);
    background:
            radial-gradient(1100px 700px at 12% 10%, var(--bg-radial-1) 0%, transparent 55%),
            radial-gradient(1100px 700px at 88% 22%, var(--bg-radial-1) 0%, transparent 55%),
            linear-gradient(180deg, var(--bg-1), var(--bg-2));
    overflow-x: hidden;
    background-attachment: fixed;
}

/* Subtle animated grid in the background */
.grid-bg {
    position: fixed; inset: 0; pointer-events: none;
    background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(60% 50% at 50% 50%, black, transparent 80%);
    animation: drift 32s linear infinite;
    opacity: .35;
    z-index: -1;
}
@keyframes drift { to { transform: translateY(40px); } }

/* Header */
header.site-header {
    position: sticky; top: 0; z-index: 20;
    backdrop-filter: saturate(120%) blur(10px);
    background: linear-gradient(180deg,
    color-mix(in srgb, var(--bg-1) 85%, transparent),
    color-mix(in srgb, var(--bg-1) 60%, transparent)
    );
    border-bottom: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(0,0,0,.25);
}
.header-inner {
    max-width: 1200px; margin: 0 auto; padding: 14px 18px;
    display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px;
}
.brand {
    display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text);
}
.brand .dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: radial-gradient(circle at 40% 40%, #fff, var(--neon-a) 40%, transparent 70%);
    box-shadow: 0 0 10px var(--neon-a), 0 0 24px var(--neon-a);
}
.brand .name { font-weight: 700; letter-spacing: .4px; }

nav.actions { display: inline-flex; gap: 10px; align-items: center; }
.btn {
    --glow: var(--neon-a);
    appearance: none; outline: none; border: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
    color: var(--text);
    padding: 10px 14px; border-radius: 12px; cursor: pointer; text-decoration: none;
    display: inline-flex; align-items: center; gap: 10px; font-weight: 600;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03), 0 0 0 0 var(--ring);
    transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
[data-theme="light"] .btn {
    background: linear-gradient(180deg, rgba(0,0,0,0.03), rgba(0,0,0,0.01));
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.02), 0 0 0 0 var(--ring);
}
.btn:hover, .btn:focus-visible {
    border-color: color-mix(in srgb, var(--glow) 50%, white 20%);
    box-shadow: 0 0 20px var(--ring), inset 0 0 0 1px rgba(255,255,255,0.08);
    transform: translateY(-1px);
}
.btn .icon { width: 18px; height: 18px; display: inline-block; }

/* Main */
main { max-width: 1200px; margin: 0 auto; padding: 28px 18px 60px; position: relative; }
.hero { display: grid; gap: 14px; margin-bottom: 22px; }
.hero h1 { margin: 0; font-size: clamp(24px, 4vw, 34px); letter-spacing: .6px; }
.hero p { margin: 0; color: var(--muted); }

/* Tiles grid */
.tiles { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
a.tile {
    position: relative; isolation: isolate; overflow: hidden;
    border: 1px solid var(--border); border-radius: 16px; text-decoration: none;
    background: linear-gradient(180deg, var(--card), rgba(255,255,255,0.02));
    padding: 22px; display: grid; align-content: start; gap: 14px; min-height: 140px;
    transition: transform .18s ease, border-color .2s ease, box-shadow .2s ease;
    color: var(--text);
    /* Default glare center to avoid undefined var warnings */
    --mx: 60%;
    --my: 40%;
}
[data-theme="light"] a.tile { background: linear-gradient(180deg, var(--card), rgba(255,255,255,0.01)); }
a.tile:hover, a.tile:focus-visible {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--neon-b) 50%, white 20%);
    box-shadow: 0 10px 30px rgba(0,0,0,.35), 0 0 36px -6px color-mix(in srgb, var(--neon-b) 65%, transparent);
}
.tile .glare {
    position: absolute; inset: -40% -40% auto auto; width: 140%; height: 140%;
    background:
            radial-gradient(200px 140px at var(--mx) var(--my), color-mix(in srgb, var(--neon-a) 28%, transparent), transparent 60%),
            radial-gradient(280px 200px at calc(var(--mx) + 10%) calc(var(--my) + 10%), color-mix(in srgb, var(--neon-b) 18%, transparent), transparent 60%);
    opacity: .45; filter: blur(32px);
    pointer-events: none; transition: opacity .15s ease;
}
a.tile:where(:hover, :focus-visible) .glare { opacity: .72; }

.tile .iconWrap {
    width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
    background: linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.02));
    border: 1px solid var(--border);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), 0 6px 16px rgba(0,0,0,.3);
}
[data-theme="light"] .tile .iconWrap {
    background: linear-gradient(180deg, rgba(0,0,0,0.06), rgba(0,0,0,0.02));
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.03), 0 6px 16px rgba(0,0,0,.12);
}
.tile .iconWrap svg { width: 28px; height: 28px; }
.tile .label { font-weight: 700; letter-spacing: .5px; }
.tile .sub { color: var(--muted); font-size: .95rem; }

/* Footer badge */
.footer {
    max-width: 1200px; margin: 26px auto 40px; padding: 0 18px; color: var(--muted);
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    font-size: .95rem; opacity: .9;
}

/* Small responsive tweaks */
@media (max-width: 520px) {
    .header-inner { grid-template-columns: 1fr; }
    nav.actions { justify-content: space-between; }
}
/* Icon micro-anim for Gravity Cube on hover */
.tile.cube:hover .iconWrap { animation: cube-bounce .8s ease-in-out infinite alternate; }
@keyframes cube-bounce { from { transform: translateY(0); } to { transform: translateY(-6px); } }

/* Modal */
.modal-overlay { position: fixed; inset: 0; display: grid; place-items: center; background: rgba(0,0,0,0.55); backdrop-filter: blur(6px) saturate(120%); z-index: 60; }
[data-theme="light"] .modal-overlay { background: rgba(0,0,0,0.25); }
.modal-overlay[hidden] { display: none; }
.modal { width: min(520px, 92vw); border: 1px solid var(--border); border-radius: 16px; background: linear-gradient(180deg, var(--glass), rgba(255,255,255,0.02)); color: var(--text); padding: 16px; box-shadow: 0 30px 60px rgba(0,0,0,.4); transform: translateY(10px) scale(.98); opacity: 0; transition: transform .18s ease, opacity .18s ease; }
.modal-overlay[data-open="true"] .modal { transform: none; opacity: 1; }

.modal-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 6px 6px 10px; }
.modal-title { margin: 0; font-size: 1.15rem; letter-spacing: .3px; }
.icon-btn { appearance: none; border: 1px solid var(--border); background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.02)); color: var(--text); border-radius: 10px; padding: 6px; display: inline-grid; place-items: center; cursor: pointer; }
.icon-btn:hover { box-shadow: 0 0 0 2px var(--ring) inset; }
.icon-btn svg { width: 18px; height: 18px; }

.modal-content { display: grid; gap: 14px; padding: 8px; }
.modal-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 420px) { .modal-actions { grid-template-columns: 1fr; } }