/* ═══ BUTTONS ════════════════════════════════════════ */

body.inkside-theme .ink-btn,
body.inkside-theme button.ink-btn,
body.inkside-theme a.ink-btn,
body.inkside-theme input[type="submit"].ink-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--ink-space-sm);
    height: var(--ink-btn-height);
    padding: 0 var(--ink-space-lg);
    font-family: var(--ink-font);
    font-size: var(--ink-font-size-base);
    font-weight: var(--ink-btn-font-weight);
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--ink-btn-radius);
    cursor: pointer;
    transition:
        background-color var(--ink-transition-fast),
        border-color var(--ink-transition-fast),
        color var(--ink-transition-fast),
        box-shadow var(--ink-transition-fast),
        transform var(--ink-transition-fast);
    white-space: nowrap;
    user-select: none;
    -webkit-appearance: none;
}

body.inkside-theme .ink-btn:active {
    transform: translateY(1px);
}

/* ── Primary ── */
body.inkside-theme .ink-btn--primary {
    background-color: var(--ink-primary);
    color: #fff;
    border-color: var(--ink-primary);
}

body.inkside-theme .ink-btn--primary:hover {
    background-color: var(--ink-primary-hover);
    border-color: var(--ink-primary-hover);
    color: #fff;
}

body.inkside-theme .ink-btn--primary:focus-visible {
    box-shadow: 0 0 0 3px var(--ink-primary-ring);
}

/* ── Accent ── */
body.inkside-theme .ink-btn--accent {
    background-color: var(--ink-accent);
    color: #fff;
    border-color: var(--ink-accent);
}

body.inkside-theme .ink-btn--accent:hover {
    background-color: var(--ink-accent-hover);
    border-color: var(--ink-accent-hover);
    color: #fff;
}

/* ── Secondary (outline) ── */
body.inkside-theme .ink-btn--secondary {
    background-color: transparent;
    color: var(--ink-primary);
    border-color: var(--ink-border);
}

body.inkside-theme .ink-btn--secondary:hover {
    background-color: var(--ink-bg-muted);
    border-color: var(--ink-border-hover);
    color: var(--ink-primary-hover);
}

/* ── Ghost ── */
body.inkside-theme .ink-btn--ghost {
    background-color: transparent;
    color: var(--ink-text-muted);
    border-color: transparent;
}

body.inkside-theme .ink-btn--ghost:hover {
    background-color: var(--ink-bg-muted);
    color: var(--ink-text);
}

/* ── Destructive ── */
body.inkside-theme .ink-btn--destructive {
    background-color: var(--ink-red);
    color: #fff;
    border-color: var(--ink-red);
}

body.inkside-theme .ink-btn--destructive:hover {
    background-color: #dc2626;
    border-color: #dc2626;
    color: #fff;
}

/* ── Sizes ── */
body.inkside-theme .ink-btn--sm {
    height: var(--ink-btn-height-sm);
    padding: 0 var(--ink-space-md);
    font-size: var(--ink-font-size-sm);
}

body.inkside-theme .ink-btn--lg {
    height: var(--ink-btn-height-lg);
    padding: 0 var(--ink-space-xl);
    font-size: var(--ink-font-size-md);
}

body.inkside-theme .ink-btn--full {
    width: 100%;
}

/* ── Icon button ── */
body.inkside-theme .ink-btn--icon {
    width: var(--ink-btn-height);
    padding: 0;
}

body.inkside-theme .ink-btn--icon.ink-btn--sm {
    width: var(--ink-btn-height-sm);
}

/* ── Disabled ── */
body.inkside-theme .ink-btn:disabled,
body.inkside-theme .ink-btn[disabled],
body.inkside-theme .ink-btn--disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ── Loading ── */
body.inkside-theme .ink-btn--loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

body.inkside-theme .ink-btn--loading::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: ink-spin 0.6s linear infinite;
}

body.inkside-theme .ink-btn--loading.ink-btn--primary::after {
    border-color: rgba(255,255,255,0.4);
    border-right-color: transparent;
}

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