/* ==========================================================================
   Buttons Component
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 1.4rem 2.8rem;
    font-family: var(--font-heading);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    line-height: 1;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-fast),
                color var(--transition-fast),
                border-color var(--transition-fast),
                box-shadow var(--transition-fast);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--color-sage);
    outline-offset: 2px;
}

/* ---- Primary (Sage) ---- */
.btn--primary {
    background-color: var(--color-sage);
    color: var(--color-white);
    border-color: var(--color-sage);
}

.btn--primary:hover,
.btn--primary:focus {
    background-color: var(--color-sage-hover);
    border-color: var(--color-sage-hover);
    color: var(--color-white);
}

/* ---- Secondary (Outlined) ---- */
.btn--secondary {
    background-color: transparent;
    color: var(--color-text-dark);
    border-color: var(--color-text-dark);
}

.btn--secondary:hover,
.btn--secondary:focus {
    background-color: var(--color-text-dark);
    color: var(--color-white);
}

/* ---- Secondary Light (for dark backgrounds) ---- */
.btn--secondary-light {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn--secondary-light:hover,
.btn--secondary-light:focus {
    background-color: var(--color-white);
    color: var(--color-text-dark);
}

/* ---- Link Style ---- */
.btn--link {
    background: none;
    border: none;
    padding: 0;
    color: var(--color-sage);
    font-weight: var(--fw-semibold);
    text-decoration: none;
}

.btn--link:hover,
.btn--link:focus {
    color: var(--color-sage-hover);
    text-decoration: underline;
}

/* ---- Small ---- */
.btn--sm {
    padding: 1rem 2rem;
    font-size: var(--fs-xs);
}

/* ---- Large ---- */
.btn--lg {
    padding: 1.8rem 3.6rem;
    font-size: var(--fs-base);
}

/* ---- Full Width ---- */
.btn--block {
    width: 100%;
}

/* ---- Loading State ---- */
.btn--loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn--loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

@keyframes btn-spin {
    to { transform: rotate(360deg); }
}