/* =========================================================
   Design system buttons
   Varianten: primary (filled), secondary (outlined), tertiary (text)
   Kleuren:   accent, success, warning, error
   Staten:    default, hover/focus, pressed, loading, disabled
   (.is-hover / .is-pressed / .is-loading forceren een staat voor de showcase)
   ========================================================= */
.ds-btn {
    --btn-base: var(--accent-color-primary);
    --btn-d20: var(--accent-color-primary-d20);
    --btn-d40: var(--accent-color-primary-d40);
    --btn-l60: var(--accent-color-primary-l60);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 2.5rem;
    min-width: 7rem;
    padding: 0.5rem 1rem;
    font-family: inherit;
    font-size: var(--font-size-small);
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
    border: 1.5px solid transparent;
    border-radius: var(--radius-md);
    background-color: transparent;
    cursor: pointer;
    transition: var(--transition-base);
}

.ds-btn-success { --btn-base: var(--status-color-success); --btn-d20: var(--status-color-success-d20); --btn-d40: var(--status-color-success-d40); --btn-l60: var(--status-color-success-l60); }
.ds-btn-warning { --btn-base: var(--status-color-warning); --btn-d20: var(--status-color-warning-d20); --btn-d40: var(--status-color-warning-d40); --btn-l60: var(--status-color-warning-l60); }
.ds-btn-error   { --btn-base: var(--status-color-error);   --btn-d20: var(--status-color-error-d20);   --btn-d40: var(--status-color-error-d40);   --btn-l60: var(--status-color-error-l60); }
.ds-btn-text-primary { --btn-base: var(--text-color-primary); --btn-d20: var(--accent-color-primary); --btn-d40: var(--accent-color-primary-d20); --btn-l60: var(--background-color-secondary); }
.ds-btn-grey    { --btn-base: var(--text-color-grey);    --btn-d20: var(--text-color-primary);      --btn-d40: var(--text-color-primary);         --btn-l60: var(--background-color-secondary); }
.ds-btn-white   { --btn-base: var(--text-color-white);   --btn-d20: var(--accent-color-primary-l60); --btn-d40: var(--accent-color-primary-l40);  --btn-l60: rgba(255, 255, 255, 0.15); }

/* Sizes */
.ds-btn-sm { min-height: 2rem;    padding: 0.35rem 0.75rem; font-size: 0.8125rem; }
.ds-btn-md { min-height: 2.5rem;  padding: 0.5rem 1rem;     font-size: var(--font-size-small); }
.ds-btn-lg { min-height: 3rem;    padding: 0.75rem 1.5rem;  font-size: 1rem; }
.ds-btn-tertiary { min-height: 0; min-width: 0; padding-left: 0.25rem; padding-right: 0.25rem; }

.ds-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* Primary: filled */
.ds-btn-primary {
    background-color: var(--btn-base);
    color: var(--text-color-white);
    box-shadow: var(--shadow-sm);
}

.ds-btn-primary:hover, .ds-btn-primary:focus-visible, .ds-btn-primary.is-hover {
    background-color: var(--btn-d20);
    box-shadow: var(--shadow-md);
    transform: var(--hover-lift);
}

.ds-btn-primary:active, .ds-btn-primary.is-pressed {
    background-color: var(--btn-d40);
    box-shadow: var(--shadow-inset-pressed);
    transform: var(--pressed-scale);
}

.ds-btn-primary.is-loading {
    background-color: var(--btn-d20);
}

/* Secondary: outlined */
.ds-btn-secondary {
    border-color: var(--btn-base);
    color: var(--btn-base);
    background-color: var(--background-color-primary);
}

.ds-btn-secondary:hover, .ds-btn-secondary:focus-visible, .ds-btn-secondary.is-hover {
    border-color: var(--btn-d20);
    color: var(--btn-d20);
    background-color: color-mix(in srgb, var(--btn-base) 10%, #ffffff);
    transform: var(--hover-lift);
}

.ds-btn-secondary:active, .ds-btn-secondary.is-pressed {
    border-color: var(--btn-d40);
    color: var(--btn-d40);
    background-color: color-mix(in srgb, var(--btn-base) 20%, #ffffff);
    transform: var(--pressed-scale);
}

/* Tertiary: text */
.ds-btn-tertiary {
    min-width: 0;
    padding-left: 0.25rem;
    padding-right: 0.25rem;
    color: var(--btn-base);
}

.ds-btn-tertiary:hover, .ds-btn-tertiary:focus-visible, .ds-btn-tertiary.is-hover {
    color: var(--btn-d20);
}

.ds-btn-tertiary:active, .ds-btn-tertiary.is-pressed {
    color: var(--btn-d40);
}

/* Loading */
.ds-btn.is-loading {
    pointer-events: none;
    transform: none;
}

.ds-btn.is-loading > :not(.ds-btn-spinner) {
    visibility: hidden;
}

.ds-btn-spinner {
    position: absolute;
    width: 1.1em;
    height: 1.1em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: ds-btn-spin 0.7s linear infinite;
}

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

/* Disabled */
/* Rounded (pill) variant: alleen voor primary en secondary */
.ds-btn-primary.ds-btn-rounded,
.ds-btn-secondary.ds-btn-rounded {
    border-radius: 999px;
}

.ds-btn:disabled, .ds-btn.is-disabled {
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    text-decoration: none;
    opacity: var(--disabled-opacity);
}

.ds-btn-primary:disabled, .ds-btn-primary.is-disabled {
    background-color: var(--disabled-color-background);
    color: var(--disabled-color-foreground);
}

.ds-btn-secondary:disabled, .ds-btn-secondary.is-disabled {
    background-color: var(--background-color-primary);
    border-color: var(--disabled-color-background);
    color: var(--disabled-color-foreground);
}

.ds-btn-tertiary:disabled, .ds-btn-tertiary.is-disabled {
    color: var(--disabled-color-foreground);
}

.ds-btn-arrow {
    display: inline-flex;
    align-items: center;
    font-size: 1.1em;
    line-height: 1;
    transition: transform var(--transition-duration-base) var(--transition-easing);
}

.ds-btn:hover:not(:disabled) .ds-btn-arrow,
.ds-btn:focus-visible .ds-btn-arrow,
.ds-btn.is-hover .ds-btn-arrow {
    transform: translateX(3px);

}