body {
    margin: 2rem;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}

h2 {
    margin-top: 0;
}

section {
    margin: 2rem 0;
    padding-bottom: 2rem;
    border-bottom: 2px solid;
}

button {
    cursor: pointer;
    min-width: 8rem;
    font-size: 1rem;
}

@media (prefers-reduced-motion: reduce) {
    button {
        transition: none;
    }

        button:hover {
            transform: none;
        }
}
@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes spinner {
    to {transform: rotate(360deg);}
}

@keyframes substrate-button-activate {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(0.95);
    }

    100% {
        transform: scale(1);
    }
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    @keyframes spin {
        from {
            transform: rotate(0deg);
        }

        to {
            transform: rotate(0deg);
        }
    }

    @keyframes spinner {
        to {transform: rotate(0deg);}
    }

    @keyframes substrate-button-activate {
        0%, 50%, 100% {
            transform: scale(1);
        }
    }
}

substrate-button {
    display: inline-block;
    user-select: none;
    min-width: 8rem;
    transition: all 0.3s;
}

substrate-button button {
        transition: all 0.3s ease;
    }

:is(substrate-button button):hover {
            box-shadow: 0 4px 12px #00000026;
            transform: translateY(-2px);
        }

substrate-button.substrate-loading {
        pointer-events: none;
    }

substrate-button.substrate-loading button {
            color: transparent;
            pointer-events: none;
        }

:is(substrate-button.substrate-loading button):hover {
                color: transparent;
            }

:is(substrate-button.substrate-loading button)::after {
                content: "";
                background: transparent;
                box-sizing: border-box;
                position: absolute;
                width: 16px;
                height: 16px;
                inset: 0;
                margin: auto;
                border-radius: 50%;
                border-top: 2px solid black;
                border-right: 2px solid transparent;
                animation: spinner 0.6s linear infinite;
            }

substrate-button[aria-disabled="true"] {
        user-select: none;
        background-color: transparent;
    }

substrate-button[aria-disabled="true"] button {
            user-select: none;
            background-color: transparent
        }

/* Disable animations and transitions for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
            substrate-button.substrate-loading button {
                transition: none;
            }

                :is(substrate-button.substrate-loading button)::after {
                    animation: none;
                    /* Show a static indicator instead of spinning */
                    border: 2px solid black;
                    opacity: 0.5;
                }
            button.substrate-button:not([disabled]):active {
                animation: none;
            }
}

:root {
    --default-color: #36393d;
}

button.substrate-button {
    border: 1px solid black;
    color: var(--default-color);
    padding: 0.5em 1em;
    position: relative;
    background-color: var(--substrate-button-background, transparent);
    appearance: none;
    outline: 2px solid transparent;
}

button.substrate-button:disabled {
        pointer-events: none;
        opacity: 0.4;
    }

/* Enhanced focus visibility */

button.substrate-button:focus,button.substrate-button:focus-visible {
        outline: 2px solid var(--default-color);
    }

button.substrate-button:focus:not(:focus-visible) {
        outline-color: transparent;
    }

button.substrate-button:not([disabled]):active {
            animation-duration: .2s;
            animation-name: substrate-button-activate;
            transition-timing-function: ease;
        }