/* Base */
:root {
    --tile-radius: 16px;
    --tile-shadow: 0 8px 30px rgba(0,0,0,0.08);
    --tile-glow: 0 10px 40px rgba(0,0,0,0.18);
    --label-bg: rgba(0,0,0,0.55);
    --label-color: #fff;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    color: #111;
    background: #ffffff;
    transition: background 420ms ease, background-color 420ms ease;
}

/* Container sizing: 90% viewport height, width at least 81% of viewport */
.tiles {
    height: 100vh;
    min-width: 81vw;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5vh 2.5vw;
    display: flex;
    align-items: center;
    justify-content: center;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1.5vmin;
    width: 100%;
    height: 100%;
}

@media (max-width: 820px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 1fr);
        gap: 2vmin;
    }
}

/* Tile */
.tile {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--tile-radius);
    background: #f7f7f7;
    box-shadow: var(--tile-shadow);
    text-decoration: none;
    overflow: hidden;
    isolation: isolate;
    transition: transform 240ms ease, box-shadow 240ms ease, filter 240ms ease, opacity 240ms ease;
}

.tile:hover { transform: translateY(-2px); }

.tile img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 240ms ease, opacity 240ms ease;
    z-index: 0;
}

.tile:hover img,
.tile.is-hovered img { 
    transform: scale(1.02);
    opacity: 0.3;
}

.tile .label {
    position: absolute;
    left: 12px;
    bottom: 12px;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--label-bg);
    color: var(--label-color);
    font-weight: 600;
    letter-spacing: 0.2px;
    font-size: 14px;
    z-index: 2;
}

.tile .description {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: rgba(240, 240, 240, 0.85);
    color: var(--tile-text-color, #111);
    font-weight: 600;
    letter-spacing: 0.2px;
    font-size: clamp(18px, 4vw, 48px);
    z-index: 3;
    opacity: 0;
    pointer-events: none;
    transition: opacity 240ms ease;
    text-align: center;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.tile:hover .description,
.tile.is-hovered .description {
    opacity: 1;
}

/* Dimming for non-hovered tiles */
.grid.dim-others .tile { filter: grayscale(0.8) saturate(0.6); opacity: 0.6; }
.grid.dim-others .tile.is-hovered { filter: none; opacity: 1; box-shadow: var(--tile-glow); }

/* About tile - white text */
.tile.about .description {
    background: rgba(240, 240, 240, 0.85);
}

/* Finnodec starfield (dark purple with subtle stars) */
.tile.finnodec {
    background: #2a1147;
    color: #fff;
}

.tile.finnodec::before,
.tile.finnodec::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(2px 2px at 20% 30%, rgba(255,255,255,0.9) 50%, transparent 55%),
        radial-gradient(1.5px 1.5px at 70% 60%, rgba(255,255,255,0.7) 50%, transparent 55%),
        radial-gradient(1.2px 1.2px at 40% 80%, rgba(255,255,255,0.6) 50%, transparent 55%),
        radial-gradient(1.2px 1.2px at 85% 25%, rgba(255,255,255,0.5) 50%, transparent 55%),
        radial-gradient(1.2px 1.2px at 10% 70%, rgba(255,255,255,0.5) 50%, transparent 55%);
    pointer-events: none;
    opacity: 0.6;
    z-index: 1; /* Render stars above image but below label */
}

.tile.finnodec::after {
    animation: twinkle 6s ease-in-out infinite;
    mix-blend-mode: screen;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 0.65; }
}

/* Accessibility focus */
.tile:focus-visible {
    outline: 2px solid #000;
    outline-offset: 2px;
}

/* Page-wide starfield when Finnodec hovered */
body.page-stars::before,
body.page-stars::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1; /* Stay behind content */
}

body.page-stars::before {
    /* subtle multi-layer star speckles */
    background-image:
        radial-gradient(2px 2px at 12% 22%, rgba(255,255,255,0.9) 50%, transparent 55%),
        radial-gradient(1.8px 1.8px at 44% 18%, rgba(255,255,255,0.7) 50%, transparent 55%),
        radial-gradient(1.4px 1.4px at 78% 28%, rgba(255,255,255,0.6) 50%, transparent 55%),
        radial-gradient(1.4px 1.4px at 26% 66%, rgba(255,255,255,0.5) 50%, transparent 55%),
        radial-gradient(1.2px 1.2px at 84% 74%, rgba(255,255,255,0.5) 50%, transparent 55%);
    opacity: 0.5;
}

body.page-stars::after {
    animation: twinkle 7s ease-in-out infinite;
    background-image:
        radial-gradient(2px 2px at 32% 42%, rgba(255,255,255,0.8) 50%, transparent 55%),
        radial-gradient(1.6px 1.6px at 64% 58%, rgba(255,255,255,0.6) 50%, transparent 55%),
        radial-gradient(1.2px 1.2px at 90% 12%, rgba(255,255,255,0.5) 50%, transparent 55%);
    opacity: 0.4;
}