/* ---- Button ---- */
.btn {
    font-family: inherit;
    font-size: var(--font-size-md);
    line-height: 1.4;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    padding: var(--spacing-xs) var(--spacing-md);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);

    &.btn--primary {
        background-color: var(--accent-color);
        color: white;

        &:hover {
            background-color: color-mix(in srgb, var(--accent-color), var(--text-color-1) 20%);
        }
    }

    &.btn--subtle {
        background-color: transparent;
        color: var(--text-color-2);
        border-color: var(--border-color-2);

        &:hover {
            background-color: var(--background-color-1);
            color: var(--text-color-1);
        }
    }

    &.btn--ghost {
        background-color: transparent;
        color: var(--text-color-2);
        border-color: transparent;

        &:hover {
            background-color: var(--background-color-1);
            color: var(--text-color-1);
        }
    }

    &.btn--danger {
        background-color: var(--error-background);
        color: var(--error-text);
        border-color: var(--error-border);

        &:hover {
            background-color: color-mix(in srgb, var(--error-background), var(--error-text) 20%);
        }
    }

    &.btn--success {
        background-color: var(--success-background);
        color: var(--success-text);
        border-color: var(--success-border);

        &:hover {
            background-color: color-mix(in srgb, var(--success-background), var(--success-text) 20%);
        }
    }

    &.btn--warning {
        background-color: var(--warning-background);
        color: var(--warning-text);
        border-color: var(--warning-border);

        &:hover {
            background-color: color-mix(in srgb, var(--warning-background), var(--warning-text) 20%);
        }
    }

    &.btn--info {
        background-color: var(--info-background);
        color: var(--info-text);
        border-color: var(--info-border);

        &:hover {
            background-color: color-mix(in srgb, var(--info-background), var(--info-text) 20%);
        }
    }

    &.btn--link {
        background-color: transparent;
        color: var(--accent-color);
        border-color: transparent;
        padding-left: 0;
        padding-right: 0;

        &:hover {
            text-decoration: underline;
            background-color: transparent;
        }
    }
}

.btn--sm {
    font-size: var(--font-size-sm);
    padding: calc(var(--spacing-xs) * 0.5) var(--spacing-sm);
}

.btn--lg {
    font-size: var(--font-size-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
}

.btn--icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
    line-height: 0;
}

.btn:focus-visible,
.dropdown__trigger:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 1px;
}

.btn[disabled] {
    opacity: 0.5;
    pointer-events: none;
    cursor: not-allowed;
}

/* Standalone inline link helper (e.g. "Need help?"). Same visual
   language as .btn.btn--link but without the button chrome. */
.link {
    color: var(--accent-color);
    text-decoration: none;
    font-size: var(--font-size-sm);

    &:hover {
        text-decoration: underline;
    }
}

/* ---- Button row (gallery / toolbar wrapper) ---- */
.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
}

/* ---- Group button — joined row of buttons / dropdowns / inputs.
   Children share borders; only outer corners stay rounded. */
.group-button {
    display: inline-flex;
    align-items: stretch;
}

.group-button > * {
    margin-right: -1px;
    position: relative;
}

.group-button > *:last-child {
    margin-right: 0;
}

.group-button > *:hover,
.group-button > *:focus-within {
    z-index: 1;
}

.group-button .btn,
.group-button .input {
    border-radius: 0;
}

.group-button > :first-child.btn,
.group-button > :first-child.input,
.group-button > :first-child .btn {
    border-top-left-radius: var(--radius-sm);
    border-bottom-left-radius: var(--radius-sm);
}

.group-button > :last-child.btn,
.group-button > :last-child.input,
.group-button > :last-child .btn {
    border-top-right-radius: var(--radius-sm);
    border-bottom-right-radius: var(--radius-sm);
}

/* ---- Segmented (form-field cousin of group-button) ---- */
.segmented__option {
    cursor: pointer;
    user-select: none;
}

.segmented__input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
    width: 0;
    height: 0;
}

.segmented__option:has(.segmented__input:checked) {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    z-index: 1;
}

.segmented__option:has(.segmented__input:focus-visible) {
    outline: 2px solid var(--accent-color);
    outline-offset: 1px;
    z-index: 2;
}

/* ---- Dropdown ---- */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown__trigger {
    list-style: none;
    cursor: pointer;
}

.dropdown__trigger::-webkit-details-marker,
.dropdown__trigger::marker {
    display: none;
}

.dropdown__caret {
    font-size: 0.75em;
    opacity: 0.7;
    margin-left: var(--spacing-xs);
}

.dropdown__menu {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    left: 0;
    min-width: 10rem;
    background-color: var(--background-color-0);
    border: 1px solid var(--border-color-2);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: var(--spacing-xs) 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
}

.dropdown--align-end .dropdown__menu {
    left: auto;
    right: 0;
}

.dropdown__item {
    display: block;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-md);
    color: var(--text-color-1);
    background: transparent;
    border: none;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
    font-family: inherit;

    &:hover {
        background-color: var(--background-color-1);
    }
}

/* ---- Theme toggle ---- */
.toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xs);
    border: 1px solid var(--border-color-2);
    border-radius: var(--radius-sm);
    background-color: var(--background-color-0);
    color: var(--text-color-2);
    cursor: pointer;
    line-height: 0;

    &:hover {
        background-color: var(--background-color-1);
        color: var(--text-color-1);
    }
}

/* ---- SF Symbol mask ---- */
.sfsymbol {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    vertical-align: middle;
    background-color: currentColor;
    mask-image: var(--sfsymbol-url);
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    -webkit-mask-image: var(--sfsymbol-url);
    -webkit-mask-size: contain;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center;
}