/* UI-S01-T03 — pg-button.css: Standard button component */
.pg-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
    border-radius: var(--pg-radius-md, 6px);
    font-family: var(--font-family, 'Inter', sans-serif);
    font-weight: 500;
    font-size: 13px;
    line-height: 1;
    padding: 7px 14px;
    cursor: pointer;
    transition: all var(--pg-t-normal, 150ms ease);
    white-space: nowrap;
    text-decoration: none;
}

.pg-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ── Sizes ─────────────────────────────────────────────── */
.pg-btn--sm { font-size: 12px; padding: 5px 10px; }
.pg-btn--lg { font-size: 14px; padding: 9px 18px; }

/* ── Variants ──────────────────────────────────────────── */
.pg-btn--primary {
    background: var(--pg-color-primary, #0070f2);
    color: #fff;
}
.pg-btn--primary:hover:not(:disabled) {
    background: var(--pg-color-primary-hover, #0054b5);
    transform: translateY(-1px);
}

.pg-btn--secondary {
    background: #fff;
    color: var(--pg-color-text, #32363a);
    border-color: var(--pg-color-border, #d9d9d9);
}
.pg-btn--secondary:hover:not(:disabled) {
    background: var(--pg-color-bg, #f5f6f7);
    border-color: #b0b7c0;
}

.pg-btn--ghost {
    background: transparent;
    color: var(--pg-color-text, #32363a);
}
.pg-btn--ghost:hover:not(:disabled) {
    background: var(--pg-color-bg, #f5f6f7);
}

.pg-btn--danger {
    background: #dc2626;
    color: #fff;
}
.pg-btn--danger:hover:not(:disabled) {
    background: #b91c1c;
}

.pg-btn--icon {
    padding: 6px;
    background: transparent;
    border: none;
    color: var(--pg-color-text-secondary, #6a6d70);
}
.pg-btn--icon:hover:not(:disabled) {
    background: var(--pg-color-bg, #f5f6f7);
    color: var(--pg-color-text, #32363a);
}

/* ── Loading Spinner ───────────────────────────────────── */
.pg-btn__spinner {
    width: 12px;
    height: 12px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: pg-spin 0.6s linear infinite;
    display: inline-block;
}

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