.btn {
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
    background: transparent;
    color: var(--ink);
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn:focus-visible {
    outline: 3px solid rgba(27, 127, 121, 0.35);
    outline-offset: 2px;
}

.btn.solid {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 10px 20px rgba(27, 127, 121, 0.18);
}

.btn.solid:hover {
    box-shadow: 0 14px 26px rgba(27, 127, 121, 0.24);
}

.btn.ghost {
    border-color: var(--stroke-strong);
    background: rgba(255, 255, 255, 0.75);
    color: var(--ink);
}

.btn.tool {
    background: #fff;
    border-color: var(--stroke);
    color: var(--ink);
    box-shadow: 0 6px 12px rgba(15, 23, 42, 0.08);
}

.btn.tool:hover {
    border-color: var(--accent);
    color: var(--accent-strong);
}

.tag {
    font-size: 0.75rem;
    letter-spacing: 0.3px;
    padding: 0.35rem 0.6rem;
    border-radius: 999px;
    border: 1px solid var(--stroke);
    background: rgba(255, 255, 255, 0.7);
    color: var(--ink-muted);
}

.select {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.select select {
    padding: 0.4rem 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--stroke);
    background: #fff;
    font-weight: 600;
    color: var(--ink);
    cursor: pointer;
}

.select select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(27, 127, 121, 0.15);
}

.copy-button {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(255, 255, 255, 0.08);
    color: #f8fafc;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.3rem 0.6rem;
    border-radius: 8px;
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 2;
}

.copy-button:hover {
    opacity: 1;
    transform: translateY(-1px);
}

.copy-button.copied {
    opacity: 1;
    background: rgba(27, 127, 121, 0.8);
}