button,
.btn,
input[type="button"],
input[type="submit"],
input[type="reset"],
a.btn {
    -webkit-font-smoothing: antialiased;
    appearance: none;
    border: 1px solid var(--color-border-subtle);
    border-radius: 0.3125em;
    background-color: var(--color-surface);
    color: var(--color-on-primary);
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.2;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 150ms ease-out,
    color 150ms ease-out,
    border-color 150ms ease-out,
    box-shadow 150ms ease-out,
    transform 100ms ease-out;
}

.btn-primary,
button.btn-primary,
input.btn-primary[type="button"],
input.btn-primary[type="submit"] {
    background-color: var(--color-accent);
    color: var(--color-on-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary,
button.btn-secondary,
input.btn-secondary[type="button"],
input.btn-secondary[type="submit"] {
    background-color: var(--color-primary);
    color: var(--color-on-secondary);
    border: 1px solid var(--color-border);
}

.btn-outline {
    --btn-bg: transparent;
    --btn-color: inherit;
    --btn-border: currentColor;
}

.btn-ghost {
    --btn-bg: transparent;
    --btn-border: transparent;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-full {
    display: flex;
    width: 100%;
}

.btn-icon-left > svg,
.btn-icon-left > i {
    margin-right: 0.25rem;
}

.btn-icon-right > svg,
.btn-icon-right > i {
    margin-left: 0.25rem;
}

button:hover,
.btn:hover,
input[type="button"]:hover,
input[type="submit"]:hover,
a.btn:hover {
    filter: brightness(0.97);
    text-decoration: none;
}

.btn-primary:hover,
button.btn-primary:hover,
input.btn-primary[type="button"]:hover,
input.btn-primary[type="submit"]:hover {
    filter: none;
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
}

.btn-secondary:hover,
button.btn-secondary:hover,
input.btn-secondary[type="button"]:hover,
input.btn-secondary[type="submit"]:hover {
    filter: none;
    background-color: var(--color-secondary-hover);
    border-color: var(--color-secondary-hover);
}

button:active,
.btn:active,
input[type="button"]:active,
input[type="submit"]:active,
a.btn:active {
    filter: brightness(0.94);
}

.btn-ghost:hover {
    background-color: var(--color-surface);
}

button:focus-visible,
.btn:focus-visible,
input[type="button"]:focus-visible,
input[type="submit"]:focus-visible,
a.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

button:disabled,
.btn:disabled,
input[type="button"]:disabled,
input[type="submit"]:disabled,
a.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    transform: none;
    filter: none;
}

.btn-group {
    display: inline-flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-group .btn {
    margin: 0;
}