.nav-btn {
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    color: #4b5563;
    transition: all 0.15s;
}
.nav-btn:hover {
    background-color: #f3f4f6;
}
.nav-btn.active {
    background-color: #2563eb;
    color: white;
}

.input-field {
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    padding: 0.375rem 0.625rem;
    font-size: 0.875rem;
    outline: none;
}
.input-field:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}
.modal.hidden {
    display: none;
}
.modal-content {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    width: 100%;
    max-width: 28rem;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.tag {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}
.tag-income {
    background-color: #dcfce7;
    color: #166534;
}
.tag-expense {
    background-color: #fee2e2;
    color: #991b1b;
}