:root { color-scheme: dark; }

body {
    font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: #020617;
    background-image:
        radial-gradient(60rem 40rem at 50% -10rem, rgba(99, 102, 241, 0.25), transparent 70%),
        radial-gradient(40rem 30rem at 90% 110%, rgba(56, 189, 248, 0.12), transparent 70%);
}

/* 100vh overshoots the visible area on mobile while the browser's
   address bar is showing; 100dvh tracks what's actually on screen. */
.min-h-dvh {
    min-height: 100vh;
    min-height: 100dvh;
}

.drag-over {
    border-color: #6366f1 !important;
    background-color: rgba(99, 102, 241, 0.10) !important;
}

#file {
    opacity: 0;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}
#file::-webkit-file-upload-button { display: none; }
#file::file-selector-button { display: none; }

#mobile-file-btn {
    display: none;
    background-color: #6366f1;
    color: #fff;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 15px;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 10;
}
#mobile-file-btn:hover { background-color: #818cf8; }

@media (max-width: 767px) {
    #mobile-file-btn { display: inline-block; }
    .desktop-hint { display: none; }
}